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Installation and Operation Instructions
FOR YOUR SAFETY: This product must be installed and serviced by a professional service technician, qualified
in hot water boiler and heater installation and maintenance. Improper installation and/or operation could create
carbon monoxide gas in flue gases which could cause serious injury, property damage, or death. Improper
installation and/or operation will void the warranty.
If the information in this manual is not followed
exactly, a fire or explosion may result causing
property damage, personal injury or loss of life.
Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any
other unit.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any unit.
• Do not touch any electrical switch; do not use
any phone in your building.
• Immediately call your gas supplier from a
nearby phone. Follow the gas supplier's
instructions.
• If you cannot reach your gas supplier, call the
fire department.
Installation and service must be performed by
a qualified installer, service agency, or gas supplier.
Installation and Operation Instructions for
O
WARNING
T
MNI
HERM
Category II and IV Venting
with Laars Linc
Assurez-vous de bien suivres les instructions
données dans cette notice pour réduire au minimum
le risque d'incendie ou d'explosion ou pour éviter
tout dommage matériel, toute blessure ou la mort.
Ne pas entreposer ni utiliser d'essence ni d'autres
vapeurs ou liquides inflammables dans le voisinage de
cet appareil ou de tout autre appareil.
QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ:
• Ne pas tenter d'allumer d'appareils.
• Ne touchez à aucun interrupteur. Ne pas vous servir des
téléphones dansle bâtiment où vous êtes.
• Appelez immédiatement votre fournisseur de gaz depuis
un voisin. Suivez les instructions du fournisseur.
• Si vous ne pouvez rejoindre le fournisseur de gaz,
appelez le service des incendies.
L'installation et l'entretien doivent être assurés par un
installateur ou un service d'entretien qualifié ou par le
fournisseur de gaz.
Document 1464
®
®
Boiler
Water Heater
Model OCH1250
Model OCV1250
1,250 MBTU/h
1,250 MBTU/h
Model OCH1500
Model OCV1500
1,500 MBTU/h
1,500 MBTU/h
Model OCH1750
Model OCV1750
1,750 MBTU/h
1,750 MBTU/h
Model OCH2000
Model OCV2000
2,000 MBTU/h
2,000 MBTU/h
Model OCH2500
Model OCV2500
2,500 MBTU/h
2,500 MBTU/h
Model OCH3000
Model OCV3000
3,000 MBTU/h
3,000 MBTU/h
AVERTISSEMENT
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Table of Contents
Related Manuals for Bradford White LAARS OmniTherm OCH1250
Summary of Contents for Bradford White LAARS OmniTherm OCH1250
- Page 1 Installation and Operation Instructions Document 1464 Installation and Operation Instructions for HERM ® Category II and IV Venting ® with Laars Linc Boiler Water Heater Model OCH1250 Model OCV1250 1,250 MBTU/h 1,250 MBTU/h Model OCH1500 Model OCV1500 1,500 MBTU/h 1,500 MBTU/h Model OCH1750 Model OCV1750 1,750 MBTU/h...
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Page 2: Table Of Contents
LAARS Heating Systems Table of Contents SECTION 1 General Information 5.A.2 Cold Water Make-Up ........27 Introduction ..........5 5.A.3 Freeze Protection ........27 Warranty .............5 Model Identification ........5 5.A.4 Suggested Boiler Piping Schematics ...28-30 Water Heaters ...........31 Safety Notes ..........6 5.B.1 Water Quality ..........31 Unit Dimensions and Components ..... - Page 3 HERM SECTION 9 Gas Valve Touchscreen, SECTION 8 (continued) Menus and Descriptions Configuration ..........63 About the Gas Valve .........95 8.D.1 CH (Central Heat) ........63 Menu Structure (Example) ....... 96 8.D.1.a CH1 (Central Heat, One) ......64 Gas Valve Display Navigation and Menus 96 8.D.1.a.1 PID Low ............65 Fuel Air Ratio &...
- Page 4 LAARS Heating Systems HERM 3000 2000 & 2500 1750 1250 & 1500 FRONT VIEW...
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Page 5: Section 1 General Information 1.A Introduction
HERM ® HERM OmniTherm - Category II / IV Vent Page 5 Commercial Boiler / Water Heater OCH & OCV with Laars Linc Control SECTION 1 General Information Standard Features 1.A Introduction 1.B Warranty ASME "H" stamp (OCH) Multiple, independent heat demands ... -
Page 6: Safety Notes
LAARS Heating Systems Page 6 Safety Notes Safety Notes are used thoughout this manual to bring attention to the presence of hazards with various risk levels and to off er important information concering the life of this product. There are 3 basic types. Indicates an imminently hazardous situation which, if not WARNING avoided, can or will result in death or serious injury and can... - Page 7 HERM Page 7 NOTE: All installations must be made in accordance with WARNING 1) American National Standard Z223.1/NFPA54-Latest Electrical Shock Hazard Edition “National Fuel Gas Code” or Electrical shock can cause severe injury, death or 2) CSA B149.1 “Natural Gas and Propane Installation property damage.
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Page 8: E Unit Dimensions And Components
LAARS Heating Systems Page 8 Unit Dimensions and Components 1.E.1 Model 1250 / 1500 All dimensions are in inches. 24.5 26.7 10.3 6" Electrical Air Inlet Connections 2" NPT Conn. 6" 48.4 Vent Cond 17.5 Trap 2 1/2" Outlet 2 1/2" Inlet 11.5 17.7 Gas Train as viewed from the front of the unit... - Page 9 HERM Page 9 Blower Gas Valve System Controls Touchscreen Gas Valve Touchscreen Control Panel Heat Exchanger Power Pack Power Connections Conduit Manual gas valve Air Filter Box Power Connections Vent Condensate Trap Water Inlet Water Outlet...
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Page 10: Model 1750
LAARS Heating Systems Page 10 1.E.2 Model 1750 All dimensions are in inches. 32.0 Electrical 20.2 31.6 Connection 8" NPT Air Inlet 2" NPT Gas Inlet 55.6 8" Vent Cond. Trap 22.7 3" Inlet 3" Outlet 20.1 Gas Train as viewed from the front of the unit Gas Valve Reset Sight Glass... - Page 11 HERM Page 11 Blower Gas Valve System Controls Touchscreen Gas Valve Touchscreen (Behind Top Panel) Control Panel Manual gas valve Power Pack Power Connections Manual Conduit Gas Valve Power Connections Air Filter Box Gas Inlet Heat Exchanger Vent Condensate Trap Water Inlet Water Outlet...
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Page 12: Models 2000 / 2500
LAARS Heating Systems Page 12 1.E.3 3000 Models 2000 / 2500 and All dimensions are in inches. 10” ELECTRICAL 20.2 32.0 42.8 AIR INLET CONNECTIONS 3000 2" NPT 2000 & 2500 65.8 71.5 65.6 10” 8" 60.2 VENT 54.3 COND TRAP 22.7 20.1... - Page 13 HERM Page 13 Blower Gas Valve Gas Valve Touchscreen Note: The Model 3000 is 7" taller than the Model 2000 and Model 2500 System Controls Touchscreen 3000 Control Panel 2000 / 2500 Heat Exchanger Power Pack Power Manual gas valve Connections Conduit Power...
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Page 14: F Unpacking
LAARS Heating Systems Page 14 Unpacking The unit should not be located in an area where leakage This unit is shipped in a single crate. Carefully of any connections will result in damage to the area disassemble the crate and inspect the unit for any adjacent to the unit, or to lower floors of the structure. -
Page 15: Section 2 Venting And Combustion Air 2.A General Venting Info
HERM Page 15 SECTION 2 Venting and Combustion Air 2.A General Venting Info WARNING ADVERTISSEMENT Tous les évents doivent être installés conformément à ce All venting must be installed according to this manual and any other applicable local codes, including but not manuel et à... -
Page 16: A.1.A Category Ii Vent
LAARS Heating Systems Page 16 2.A.1.a Category II Vent Non-positive pressure vent systems are generally vertically-terminated. Table 2 gives guidelines for vent and air pipe sizes, but the draft must be measured to ensure that it remains between -0.001” w.c. and -0.10” w.c. at all firing rates. The vent system must be sealed stainless steel. -
Page 17: Exhaust Vent Terminal
HERM Page 17 2.A.3 Exhaust Vent Terminal An exhaust vent terminal must be installed. If an exhaust vent terminal is not available with the certified vent system, the manufacturer suggests the use of a coupler fitting from the certified vent system into which the vent terminal screen can be installed. -
Page 18: B Common Venting
LAARS Heating Systems Page 18 2.B Common Venting Refer to the installation and operating instructions on all appliances to be common vented for instructions, WARNING warnings, restrictions and safety requirements. If safe operations of all appliances connected to a common Operation of appliances with a blocked common vent may lead to serious injury or death. -
Page 19: C Locating Vent & Combustion
HERM Page 19 After it has been determined that each appliance système d’évacuation est mis à l’air libre de façon adéquate. Remettre les portes et les fenêtres, les remaining connected to the common venting ventilateurs, les registres de cheminées et les appareils system properly vents when tested as outlined au gaz à... -
Page 20: Side-Wall Combustion Air Terminal
LAARS Heating Systems Page 20 *When vent terminal is less than 10 feet (3 m) horizontally from a forced air inlet, the terminal must be at least 3 feet (0.9 m) above the air inlet. (US only) U.S. Installations (see note 1) Canadian Installations (see note 2) A= Clearance above grade, veranda, porch, 12 inches (30 cm) - Page 21 HERM Page 21 Multiple Vents 2” Min. (Typ) Window OUTLET Multiple Air Intakes 2” Min. (Typ) 36” 12” 84” INLET Terminals must be placed such that they are a Minimum of 12” above the Above expected snow line expected snow line. Local codes may have more specific requirements and 12”...
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Page 22: Outdoor Installation
LAARS Heating Systems Page 22 Installations in the Commonwealth of 2.D Outdoor Installation Massachusetts Precautions must be taken to prevent water in the heat exchanger and condensate inside and outside of the In Massachusetts the following items are required if the boiler from freezing. -
Page 23: Section 3 Gas Supply And Piping
HERM Page 23 SECTION 3 Gas Supply and Piping 3.A Gas Supply and Piping Review the following instructions before proceeding with the All Installations must conform to the National Fuel Gas installation. Code ANSI Z223.1/NFPA54, and/or local codes. In 1. Verify that the unit is fitted for the proper type of gas by Canada, the installation must conform to the latest edition checking the rating plate. -
Page 24: Gas Pipe Sizing
LAARS Heating Systems Page 24 3.B Gas Pipe Sizing SECTION 4 Water Flow and Headloss Data The following are gas line sizing examples from the National Fuel Gas Code. Size your gas lines properly, 4.A General Water Flow Information based on your installation and all applicable codes. SCH 40 METAL PIPE CAPACITY FOR 0.60 SPECIFIC This appliance is a water-tube design that requires Natural Gas... -
Page 25: B Boiler Water Flow & Headloss Data
HERM Page 25 4.B Boiler Water Flow & Headloss Data See Table 11 for water flow and boiler headloss, based on heat exchanger temperature rise. Model 20°F 25°F 30°F 35°F 40°F Flow Headloss Flow Headloss Flow Headloss Flow Headloss Flow Headloss 1250 25.0... -
Page 26: Recovery Data
LAARS Heating Systems Page 26 4.D Water Flow Recovery Data Model Temperature Rise 40°F 50°F 60°F 70°F 80°F 90°F 100°F 1250 3293 2634 2195 1881 1646 1463 1317 1500 3920 3136 2613 2240 1960 1742 1568 1750 4568 3654 3045 2610 2284 2030... -
Page 27: Section 5 Piping
HERM Page 27 SECTION 5 Piping 5.A Boiler Water Piping 5.A.1 Boiler Water Connections in the heat exchanger and condensate inside and outside of the boiler from freezing. Damage due to freezing water or NOTE: This unit must be installed in a closed pressure condensate is not covered by the warranty. -
Page 28: Suggested Boiler Piping Schematics
LAARS Heating Systems Page 28 5.A.4 Suggested Boiler Piping Schematics 1. If the outlet sensor detects less than 45°F, the control Figure 4 on page 28 through Figure 6 on page 30 show suggested piping configurations for boilers. These energizes the boiler pump. diagrams are only meant as guides. - Page 29 HERM Page 29 Space heating Note - zone circuits This drawing is a schematic representation of a piping style, and is not intended to be used as a working installation drawing. Local code requirements must be met. Low temp. radiant zone Space heating zone circuit Air vent 4 pipe dia.
- Page 30 LAARS Heating Systems Page 30 High temp. Note - Space heating This drawing is a schematic representation of space heating zone circuit zone circuits a piping style, and is not intended to be used as a working installation drawing. Local code requirements must be met. Space heating zone circuit Air vent 4 pipe dia.
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Page 31: Water Heaters
HERM Page 31 5.B Water Heaters 5.B.1 5.B.3 Cold Water Make-Up Water Quality Water heaters must be installed in water conditions of The cold water make-up may be connected to the tank 15 gpg hardness or less, with a pH range of 6.5 to 9.5 as shown in Figure 7 through Figure 9. - Page 32 LAARS Heating Systems Page 32 NOTE: This drawing shows suggested piping configuration and valving. Check with local codes and ordinances for additional requirements. NOTES: 1. Locate the DHW sensor or remote aquastat well in lower 1/3 of tank. 2. Backflow preventer may be required - check local codes. 3.
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Page 33: Section 6 Condensate Drain Trap
HERM Page 33 SECTION 6 Condensate Drain Trap SECTION 7 Electrical Connections 7.A Installation Warnings This appliance creates condensation at some operating conditions as a by-product of cold water supply conditions. The condensate must be drained from unit. CAUTION A combination condensate drain/trap is included on The supply voltage to this unit must not be the unit. -
Page 34: Main Power Connections
LAARS Heating Systems Page 34 7.B Main Power Connections This unit is provided with an electrical junction box on the rear panel for main power connections. See Figure 11. All power wires are factory installed between this junction box and the main high voltage box at the front of the unit. -
Page 35: Control Panel Layout
120N 120N HERM Page 35 120N 120L 7.D Control Panel Layout 120L 120L BOILER PUMP (N) 17 BOILER PUMP (L) 18 DHW PUMP DHW PUMP SYSTEM PUMP SYSTEM PUMP SPARE 1 SPARE 1 SPARE 2 SPARE 2 ALARM BELL ALARM BELL SYSTEM SUPPLY SYSTEM SUPPLY SYSTEM RETURN... -
Page 36: Power
LAARS Heating Systems Page 36 7.E.1 Power Notice When running the Power and Field Connection 7.E.2 Boiler Pump wiring between the units (Cascade, System Sensor, Outdoor Sensor, Building Automation, If connecting a boiler contactor or pump, use terminals Etc), always Exit and Enter the wiring through 17 (neutral) and 18 (line voltage). -
Page 37: Heat Demands
HERM Page 37 7.E.6 Heat Demands (Boiler / Water Heater) Alarm - when used, is connected to terminals 54 (common), 55 (normally closed), and 56 (normally open). CH1/DHW1 - if a thermostat/aquastat or end switch The controller closes the normally open set of contacts (isolated contact only) is used as a heat demand, connect whenever the unit is locked out. - Page 38 OUTDOOR OUTDOOR OUTDOOR OUTDOOR OUTDOOR OUTDOOR CH1/DHW1 CH1/DHW1 CH1/DHW1 LAARS Heating Systems Page 38 CH1/DHW1 CH1/DHW1 CH1/DHW1 BOILER PUMP (N) 17 BOILER PUMP (N) 17 BOILER PUMP (N) CH2/DHW2 CH2/DHW2 CH2/DHW2 BOILER PUMP (L) 18 BOILER PUMP (L) 18 BOILER PUMP (L) 7.E.12 RS485 BMS (continued) CH2/DHW2...
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Page 39: Modbus/Bacnet Memory Map
HERM Page 39 Modbus/BACnet Memory Map BACnet BACnet Modbus Data Object Address Map Descriptor Name Type Read/Write Notes Read Inlet sensor Read Read Outlet sensor Read Read DHW sensor Read Read System Inlet Sensor Read Read System Outlet Sensor Read Read Outdoor Sensor Read... - Page 40 LAARS Heating Systems Page 40 7.F Modbus/BACnet Memory Map (continued) BACnet BACnet Modbus Data Object Address Map Descriptor Name Type Read/Write Notes SYSTEM RETURN PROBE ERROR = 34 Read Error Code Read OUTDOOR PROBE ERROR = 35 FLUE PROBE ERROR = 36 HIGH LIMIT AUTO ERROR = 41 HIGH DELTA T ERROR = 42 FAN SPEED ERROR = 43...
- Page 41 HERM Page 41 BACnet BACnet Modbus Data Object Address Map Descriptor Name Type Read/Write Notes 0 = Not Present 1 = Not Available Read Lead 0 State Read 2 = Available 3 = Running 4 = Locked Out Read Lead 0 Firing Rate Read Current firing rate (0-100%) Read...
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Page 42: Wiring Diagrams, High Voltage
LAARS Heating Systems Page 42 Wiring Diagrams, High Voltage Figure 16. Wiring Diagram, 208 or 240V 1 Phase 1500 to 2500... - Page 43 HERM Page 43 Figure 17. Wiring Diagram, 208V 3 Phase 2500...
- Page 44 LAARS Heating Systems Page 44 7.G Wiring Diagrams, High Voltage (continued) Figure 18. Wiring Diagram, 480V or 600V 3 Phase 2500...
- Page 45 HERM Page 45 Figure 19. Wiring Diagram, 208V or 480V 3 Phase 3000...
- Page 46 LAARS Heating Systems Page 46 7.G Wiring Diagrams, High Voltage (continued) Figure 20. Wiring Diagram, 600V 3 Phase 3000...
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Page 47: Ladder Diagrams
HERM Page 47 7.H Ladder Diagrams CONTAINED HEREIN ARE 120VAC (1PH/60Hz) CO.AND SHALL NOT BE OCUMENTS, USED OR NG OR ANY OTHER TB1-17 RIZED IN WRITING BLOWER MOTOR TB1-18 TB1-19 TB1-20 TB1-21 TB1-22 TB1-23 TB1-24 TB1-25 TB1-26 TB1-27 POWER SWITCH TB1-28 TB1-29 POWER INDICATOR... - Page 48 LAARS Heating Systems Page 48 7. H Ladder Diagrams (continued) HEREIN ARE 208/220/240VAC (1PH/60Hz) ALL NOT BE L1 L2 USED OR Y OTHER TB1-17 Boiler (N TING Pump (L TB1-18 BLOWER MOTOR TB1-19 TB1-20 Pump TB1-21 System TB1-22 Pump Spare 1 TB1-23 TB1-24 Spare 1...
- Page 49 HERM Page 49 7. H Ladder Diagrams (continued) EIN ARE 208VAC (3PH/60Hz) NOT BE REV. D OR 17-152 THER TB1-17 Boiler (N) POWER OUTPUTS TB1-18 Pump (L) CHANGE: BLOWER MOTOR TB1-19 TB1-20 Pump TB1-21 System TB1-22 Pump TB1-23 Spare 1 TB1-24 Spare 1 CONTACTS...
- Page 50 Page 50 LAARS Heating Systems 7. H Ladder Diagrams (continued) EIN ARE 480/575/600VAC (3PH/60Hz) NOT BE REV. D OR 17-1 BLOWER MOTOR TB1-17 POWER Boiler (N) CHANGE: OUTPUTS 220VAC (1PH/60Hz) Pump (L) TB1-18 TB1-19 TB1-20 Pump TB1-21 System TB1-22 Pump TB1-23 Spare 1 120VAC TRANSFORMER...
- Page 51 HERM Page 51 EIN ARE 208/480VAC (3PH/60Hz) NOT BE REV. D OR 17-152N THER TB1-17 Boiler (N) POWER CHANGE: OUTPUTS Pump (L) TB1-18 BLOWER MOTOR TB1-19 TB1-20 Pump TB1-21 System TB1-22 Pump TB1-23 Spare 1 120VAC TRANSFORMER TB1-24 Spare 1 CONTACTS (OUTPUTS) TB1-25...
- Page 52 Page 52 LAARS Heating Systems 7. H Ladder Diagrams (continued) EIN ARE 575/600VAC (3PH/60Hz) NOT BE REV. D OR THER TB1-17 Boiler (N) POWER CHANG 480VAC (3PH/60Hz) OUTPUTS Pump (L) BLOWER MOTOR TB1-18 TB1-19 TB1-20 Pump TB1-21 System TB1-22 Pump Spare 1 TB1-23 120VAC TRANSFORMER...
- Page 53 HERM Page 53 This page intentionally left blank...
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Page 54: Wiring Diagram
THIS DOCUMENT AND THE INFORMATION CONTAINED HEREIN ARE Page 54 LAARS Heating Systems PROPRIETARY TO LAARS HEATING SYSTEMS CO.AND SHALL NOT BE REPRODUCED, TRANSFERRED TO OTHER DOCUMENTS, USED OR DISCLOSED TO OTHERS FOR MANUFACTURING OR ANY OTHER PURPOSE EXCEPT AS SPECIFICALLY AUTHORIZED IN WRITING Wiring Diagram BY LAARS HEATING SYSTEMS CO. - Page 55 REVISIONS HERM Page 55 REV. DRAFT CHECK DG 3/7/19 RR 3/7/19 17-152N-03 UPDATED TO ADD FAN TO CONTROL PA CHANGE: 24VAC TB1-16:3 24L TB1-12:3 24N 24VAC (COM) UNLESS OTHERWISE SPECIFIED: DO NOT SCALE DRAWING. TOLERANCES ARE: THIRD ANGLE PROJECTION. DECIMALS .X FRACTIONS 1/8"...
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Page 56: Section 8 Control Operation
Page 56 LAARS Heating Systems SECTION 8 Control Operation 8.A The Home Screen CSP: is the Calculated Set Point and is the Current Demand. This could be either the CH1 (Central Heat One), CH2, or the DHW (Domestic Hot Water), depending on the model and the installation set up. -
Page 57: Keypad Operations
HERM Page 57 8.A.2 Keypad Operations NOTE: You can always tell exactly where you have navigated to Navigation Bar. by looking at the icons in the In this example you are in Home / Configure / Central Heat / Central Heat One Shows the current setting of the Parameter. -
Page 58: Login To Lock / Unlock The Disp Screen
LAARS Heating Systems Page 58 8.B Login to Lock / Unlock the Display Screen Password Protection: To change configuration or parameters, a password is required. The control system includes three levels of password protection. Touch the 'Current Lock Status' icon at the top of the screen. USER password is lhs. -
Page 59: Quick Start
Q U I C K S T A R T HERM Page 59 8.C Quick Start Quick Start will allow a user to configure the basic functionality of the control, without going through all of the parameters that are available. The 6 basic functionalites are •... -
Page 60: Ch1 (Central Heat, One) 1
Q U I C K S T A R T LAARS Heating Systems Page 60 8.C.1.a CH1 (Central Heat, One) • Enable/Disable – This allows CH1 to be enabled/disabled. The default setting is Enabled. • Set Point – This is the set point temperature. 8.C.1.b CH2 (Central Heat, Two) To navigate to the CH2 Quick Start Screen, touch the CH2 Icon on the CH Quick... -
Page 61: Outdoor Reset
Q U I C K S T A R T HERM Page 61 8.C.3 Outdoor Reset Outdoor reset adjusts a boiler’s setpoint based on outdoor air temperature. This is for boilers only, and is not used for domestic water. To navigate to the Outdoor Quick Start Screen, touch the Outdoor Icon on the Quick Start Screen. The Outdoor Quick Start Screen allows the adjustment of the following parameters: •... -
Page 62: Anti-Short Cycle
Q U I C K S T A R T LAARS Heating Systems Page 62 8.C.5 Anti-Short Cycle To navigate to the Anti-Short Cycle Quick Start Screen, touch the Anti-Short Cycle Icon on the Quick Start Screen. The Anti-Short Cycle Quick Start Screen allows adjustment of the following parameter: •... -
Page 63: D Configuration
C O N F I G U R A T I O N HERM Page 63 8.D Configuration This area of the controller allows access to all parameters available, based on the access level that is unlocked. To navigate to the Configuration Screen, touch the Configure Icon in the lower left portion of the Home Screen. The Configuration Screen shows all configurable parameters. -
Page 64: D.1
C O N F I G U R A T I O N LAARS Heating Systems Page 64 8.D.1 CH (Central Heat) “CH” stands for “central heat.” It is used for space heating demands. On the Configure Screen, touch the CH thermometer icon to navigate to the CH Selection Screen There are two identical heat demands, CH1 and CH2, each with independent control algorithms and independent inputs on the input terminal strip, see SECTION 7 From the CH Selection Screen, touching CH1 navigates to the CH1... -
Page 65: D.1.A.1 Pid Low
C O N F I G U R A T I O N HERM Page 65 8.D.1.a.1 PID Low Active below Setpoint. Note that in most cases, PID parameters will not need to be changed. The PID Parameters Screen allows adjustment to the following parameters: •... -
Page 66: Dhw (Domestic Hot Water)
LAARS Heating Systems Page 66 8.D.2 DHW (Domestic Hot Water) To navigate to the DHW/DHW3 Screen, touch the DHW faucet icon on the Configure Screen. DHW/DHW3 has all the same parameters as CH1/DHW1 and CH2/DHW2 with one exception. DHW/DHW3 has the following additional parameter for adjustment: •... -
Page 67: Outdoor Reset
C O N F I G U R A T I O N HERM Page 67 8.D.3 Outdoor Reset Outdoor reset adjusts a boiler’s setpoint based on outdoor air temperature. This is for boilers only, and is not used for domestic water. The Outdoor Parameters Screen allows the adjustment of the following parameters: •... -
Page 68: Cascade (All About Lead / Lag)
LAARS Heating Systems Page 68 8.D.4 Cascade (All about Lead / Lag) An installation with two or more units may be configured for cascade operation. Up to eight units can be cascaded and controlled together. To navigate to the Cascade Screen, touch the Cascade Icon on the Configuration Screen. The Cascade Screen provides four navigation icons to configure the system for cascade operations. - Page 69 C O N F I G U R A T I O N HERM Page 69 Log In Settings Parameter User Installer Default Unit Base Load Drop Load Min On Time Seconds Min Off Time Seconds Table 17. Parameter Settings minimum (instead of the allowable minimum firing rate of 5%).
- Page 70 LAARS Heating Systems Page 70 As the load increases: As the load decreases: • Until all units are firing, no unit is requested to exceed • As long as all units are firing – the base load value can the base load value. be exceeded, as long as all units maintain the same firing rate.
- Page 71 C O N F I G U R A T I O N HERM Page 71 About Cascading (Lead / Lag) -continued Low demand: The first boiler in sequence ignites and gradually increases firing rate to satify the heat demand. Increased demand: Once the first boiler reaches the Base Load Value (40%) firing rate, the second boiler...
- Page 72 eight boilers reach the Base Load Value , all units are allowed to increase firing rate (same at all boilers) up to C O N F I G U R A T I O N LAARS Heating Systems Page 72 maximum firing rate.
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Page 73: D.4.A Cascade Parameters
C O N F I G U R A T I O N HERM Page 73 8.D.4.a Cascade Parameters To navigate to the Cascade Parameters Screen, touch the Cascade Icon on the Configuration Screen, then touch the Cascade Parameters Icon. The Cascade Parameters Screen allows adjustment of the following parameters: •... -
Page 74: D.4.A.1 Base / Drop Load
C O N F I G U R A T I O N LAARS Heating Systems Page 74 8.D.4.a.1 Base / Drop Load Base Load – Is the firing rate that must be achieved prior to adding another unit to satisfy the heat demand. Drop Load –... -
Page 75: D.4.C Redundancy
C O N F I G U R A T I O N HERM Page 75 8.D.4.c.1 Rotation Setup There are two options for cascade Rotation Setup, Rotation ‘Mode’: Run Time Recurrence In the Run Time Mode, you can adjust only the For Recurrence Mode, there are two parameters: Time of Day. -
Page 76: Pumps
C O N F I G U R A T I O N LAARS Heating Systems Page 76 8.D.5 Pumps The Pump Configuration Screen allows adjustment of the following 7 parameters: • Boiler Pump Control – This parameter provides the ability to set the boiler pump functionality to be: Auto –... -
Page 77: D.5.A Vari-Prime
C O N F I G U R A T I O N HERM Page 77 8.D.5.a Vari-Prime The Vari-Prime Screen allows the adjustment of the following parameters: • On Delay – Upon a call for heat, once the unit ignites, this is the amount of time the unit will wait prior to modulating the pump speed. -
Page 78: Manual Firing Rate
C O N F I G U R A T I O N LAARS Heating Systems Page 78 8.D.6 Manual Firing Rate To navigate to the Manual Firing Rate Screen, touch the Manual Firing Rate Icon on the Configuration Screen. The Manual Firing Rate Control Screen allows the adjustment of the following parameters: •... -
Page 79: D.7.A Delta T Parameters
C O N F I G U R A T I O N HERM Page 79 8.D.7.a Delta T Parameters To navigate to the Delta T Parameters Screen, touch the Temp Limits Icon on the Configuration Screen, then touch the Delta T Parameters button on the Temperature Limits Parameters Screen. -
Page 80: External
C O N F I G U R A T I O N LAARS Heating Systems Page 80 8.D.8 External The External Configuration Screen applies to the 0-10VDC (4-20mA) analog input BMS signal, and allows adjustment of the following parameters: To navigate to the External Configuration Screen, touch the External Icon on the Configuration Screen. -
Page 81: D.8.A External - Remote Set Point
C O N F I G U R A T I O N HERM Page 81 8.D.8.a External – Remote Set Point. External (0 – 10VDC or 4 – 20mA) • An External heat demand can be initiated by a Building Management System (BMS) using a 0-10VDC or 4-20mA signal. -
Page 82: Time & Date
LAARS Heating Systems Page 82 8.D.9 Time & Date To navigate to the Time & Date Screen, touch the Time and Date area of ANY Screen. The Time & Date Quick Start Screen allows adjustment of the following parameters: • Hour •... -
Page 83: D.10.A Demands Priorities
C O N F I G U R A T I O N HERM Page 83 8.D.10.a Demands Priorities To navigate to the Demands Priorities Screen, first go to the Miscellaneous folder. At the Demands Priorities screen select each configured demand and assign a priority number. NOTE: Demands Priority is only active on the lag or stand alone boilers. -
Page 84: D.10.C Warm Weather
C O N F I G U R A T I O N LAARS Heating Systems Page 84 8.D.10.c Warm Weather To navigate to the Warm Weather Configuration Screen, touch the Miscellaneous Features on the Configuration Screen, then touch the Warm Weather Icon on the Miscellaneous Features screen. The Warm Weather Configuration Screen allows adjustment of the following parameters: •... -
Page 85: D.10.D Com Port, Bms
C O N F I G U R A T I O N HERM Page 85 8.D.10.d COM Port, BMS The control has Modbus and BACnet MSTP (RS485) protocols on board, for use with Building Management Systems. Gateways can be used for other communication protocols. To navigate to the COM Port Configuration Screen, touch the Misc Icon on the Configuration Screen, then touch the COM Port Icon on the Misc Configuration Screen. -
Page 86: D.10.E Temperature Conversion
C O N F I G U R A T I O N LAARS Heating Systems Page 86 8.D.10.e Temperature Conversion To navigate to the Temperature Conversion Configuration Screen, touch the Temperature Conversion Icon on the Miscellaneous Features screen. The Temperature Conversion Configuration Screen allows adjustment of the following parameter: •... -
Page 87: Login
C O N F I G U R A T I O N HERM Page 87 8.D.11 Login To navigate to the Login Screen, touch the Lock Icon on any screen. The Login Screen allows the operator to make parameter adjustments based on the level of the login credentials. See Section 8.B on page 58 Table 19 on page 107... -
Page 88: E Service Screens
S E R V I C E LAARS Heating Systems Page 88 8.E Service Screens To navigate to the Service Screen, touch the Service Icon in the lower left portion of the Home Screen. Available only to the factory or technician qualified at the OEM level. -
Page 89: Digital I/O Inputs
S E R V I C E HERM Page 89 8.E.2 Digital I/O Inputs There are two screen associated with the Digital I/O: Digital I/O Screen-Inputs; Digital I/O Screen-Outputs. Navigate to the Digital I/O Screen by touching the Digital I/O Button on the Service Screen. Digital I/O Inputs: The indicator light associated with the input is green when the input is satisfied. -
Page 90: Analog I/O
S E R V I C E LAARS Heating Systems Page 90 8.E.3 Analog I/O Navigate to the Analog I/O Screen by touching the Analog I/O Button on the Service Screen. There are two screens associated with the Analog I/O: Analog I/O Inputs; Analog I/O Outputs. Analog I/O Input: There are three types of analog inputs;... -
Page 91: Screen Settings Timeout
HERM S E R V I C E Page 91 8.E.4 Screen (Settings Timeout) Navigate to Screen Settings by touching the Screen Button on the Service Screen. There are two adjustable screen settings: Light Timeout and AutoLock Timeout. • Light Timeout allows the user to adjust the amount of time the touch screen backlight will remain lit after user interaction has ceased. -
Page 92: Restart Touchscreen & Recalibrate
S E R V I C E LAARS Heating Systems Page 92 8.E.6 Restart (Touchscreen & Recalibrate) Touching the Restart Button on the Service Screen reboots the display. If the touchscreen seems to be out of alignment, it can be recalibrated by pressing the Restart Button, promptly touching (and holding) the touch screen. Follow the calibration procedure as shown on the touch screen. -
Page 93: F Messages And Usb
HERM Page 93 Messages and USB 8.F.1 Messages The ‘Messages’ icon at the bottom of the home screen displays an ‘Exclamation Point’ when messages are present. Press the icon to see the message(s). 8.F.2 USB Functionality The USB port is on the back of the display. To access it, the control display can be lifted off of the front of the unit and the USB port is found behind the touchscreen. -
Page 94: G Active Demands
LAARS Heating Systems Page 94 8.G Active Demands The Active Demand Window indicates the status of active heat demands. A black heat demand icon indicates the heat demand that is currently being satisfied. A “greyed out” heat demand icon is either lower in priority than the heat demand that is currently being satisfied, or the heat demand has reached set point, but remains active. -
Page 95: Section 9 Gas Valve Touchscreen, Menus And Descriptions
HERM Page 95 SECTION 9 Gas Valve Touchscreen, Menus and Descriptions 9.A About the Gas Valve This unit utiizes a Honeywell Gas Valve with a touchscreen display. Models 1250 and 1500 Gas Valve Reset Sight Glass Models 1750, 2000 and 2500 Gas Valve Reset Sight Glass... -
Page 96: Menu Structure (Example)
LAARS Heating Systems Page 96 9.B Menu Structure (Example) Your current menu location is always shown in the NAV LOCATION. Keep an eye on this area as it will always tell you where you have navigated to. NAV LOCATION: MENU TABS: SELECTION AREA: MENU OPTIONS: 9.C Gas Valve Display Navigation and Menus... - Page 97 HERM Page 97 From Valve 1, select Setup & Tests. Note your location. Selections • Valve Status - This section gives general information about valve operation and hours and cycles. • Setup & Tests – Allows for valve settings adjustment, configuration of optional components on the boiler and combustion setup of the boiler.
- Page 98 LAARS Heating Systems Page 98 You are now in the Settings menu. MENU TABS: Menu Tabs. General: This menu displays these current settings (as shown). Valve body: Allows the selection of the proper valve body size. This should be done at the factory. No adjustments necessary.
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Page 99: Fuel Air Ratio & Ignition, Menus
HERM Page 99 9.D Fuel Air Ratio & Ignition, Menus Click back to Setup & Tests From Setup & Tests, select Fuel-Air Ratio & Ignition. Fuel Air Ratio & Ignition has several menus that allow for combustion setup, Ignition characteristics modification, Loading and saving A/F curves and valve configurations. -
Page 100: Ignition Menu
LAARS Heating Systems Page 100 9.D.2 Ignition Menu The settings in the ignition tab allow the ignition characteristics of the boiler to be customized to fit the boiler application if needed. In most cases customization will not be necessary. The ignition graph shown is a representation of how the gas valve will react during the trial for ignition process. -
Page 101: Base Curve Menu
HERM Page 101 9.D.3 Base Curve Menu Controls the base A/F ratio curves. These values are set at the factory and can not be adjusted in the field. 9.D.4 Correction Curve Menu Allows for adjustment of the A/F ratio by the installer. To adjust the A/F curves follow the steps provided. Set the desired fan speed. -
Page 102: Summary Menu
LAARS Heating Systems Page 102 9.D.5 Summary Menu The Summary tab shows the A/F curves for the base curve and correction curve, so each curve can be reviewed. The summary tab doesn’t allow the A/F curves to be adjusted, so there is not a risk of making unintended changes 9.D.6 Load &... -
Page 103: Diagnostics
HERM Page 103 Diagnostics Home > Valve 1 > Diagnostics – The diagnostics section is broken up into several menus and will help to diagnose issues if they occur. Active faults - lists the faults that are currently active preventing or limiting boiler function. Fault History –... -
Page 104: Verification Menu
LAARS Heating Systems Page 104 Verification Menu Verification is a required process when changes to safety parameters are made. Verification forces a review of the changes made and allows those changes to be accepted. When a setting is changed that requires verification a notification will appear at the bottom of the screen. Press the Verify Safety Parameters button to proceed to the verification process. - Page 105 HERM Page 105...
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Page 106: Gas Valve Password & Login Menu
Page 106 LAARS Heating Systems 9.F Verification Menu (continued) 9.G Gas Valve Password & Login Menu The login screen will appear with an attempt to make changes to a password protected parameter. The login screen can also be accessed by pressing the login icon at the top of the gas valve display. When entering a password select the installer tab and then enter the password LaarsOmt2018. -
Page 107: Section 10 Parameter Tables
HERM Page 107 SECTION 10 Parameter Tables Table 19. OCH (Boiler) Parameter and Range Table (next 3 pages) Minimum Maximum Default Time & Date Hour Minute Month Year CH1 Enable/Disable Disable Enable Enable 100 F 200 F 180 F CH1 Setpoint 20 F 10 F CH1 On Hysteresis... - Page 108 LAARS Heating Systems Page 108 Minimum Maximum Default 0 secs 600 secs 60 secs Boiler Pump Post Circulation DHW Pump Control Disable Auto/ Always On Auto 0 secs 600 secs 60 secs DHW Pump Post Circulation Auto/ Always On/ Disable Auto System Pump Control Off During DHW...
- Page 109 HERM Page 109 Table 20. OCV (Water Heater) Parameter and Range Table (next 2 pages) Minimum Maximum Default Time & Date Hour Minute Month Year DHW1 Disable Enable Enable DHW1 Enable/Disable 100 F 200 F 180 F DHW1 Setpoint DHW1 On Hysteresis 20 F 10 F 20 F...
- Page 110 LAARS Heating Systems Page 110 Auto/ Always On/ Off During Boiler Pump Control Disable DHW/Auto - Off Auto (continured) When Temperature Reached Boiler Pump Post Circulation 0 secs 600 secs 60 secs Disable Auto/ Always On Auto DHW Pump Control DHW Pump Post Circulation 0 secs 600 secs...
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Page 111: Section 11 Initial Startup Instructions
HERM Page 111 SECTION 11 Initial startup Instructions 11.A Filling the Boiler System water level exceeds ¼ of the volume of the expansion tank, open the tank drain, and drain to that level. 1. Ensure the system is fully connected. Close all bleeding devices and open the make-up water valve. -
Page 112: Initial Operation
LAARS Heating Systems Page 112 11.B Initial Operation WARNING The initial setup must be checked before the unit is put If any odor of gas is detected, or if the gas burner into operation. Problems such as failure to start, rough does not appear to be functioning in a normal ignition, strong exhaust odors, etc. -
Page 113: Combustion Setup
HERM Page 113 11.E Combustion setup The OmniTherm uses a sophisticated gas control system that monitors the gas air ratio and automatically adjusts to maintain proper operating conditions. On initial installation and subsequent inspections, the CO 2 levels should be checked and if outside the allowable range, adjustments made. To make adjustments to the gas air ratio use the Gas valve display inside the boiler jacket and follow the process below. -
Page 114: Combustion At The Gas Valve Display
LAARS Heating Systems Page 114 11.E.2 Combustion at the Gas Valve Display 2. Measure the combustion product to determine if the CO 2 levels fall in the ranges listed in the table. If the CO 2 level is out of range adjust the CO 2 by using the gas valve display and the process below. Using the gas valve display Navigate to Home >... -
Page 115: Section 12 Maintenance
HERM Page 115 SECTION 12 Maintenance 12.A System Maintenance 12.B Maintenance Notes Do the following once a year: Use only genuine manufacturers replacement parts. Lubricate all the pumps in the system, per the CAUTION instructions on the pump. When servicing the controls, label all wires before Inspect the venting system for obstruction or disconnecting them. -
Page 116: Main Omnitherm Controller
LAARS Heating Systems Page 116 pass through ceramic insulators and then align with allows the entire gas valve and fuel/air mixer assembly to the ground rod. In order for a proper spark to form, be removed as an assembly to facilitate inspection and the mounting bracket must be grounded to the boiler cleaning. - Page 117 HERM Page 117 12.B.8 Gas Pressure Switches If black carbon soot buildup on the heat exchanger is suspected, disconnect the electrical supply to the unit The high and low pressure gas switches are manual and turn off the gas supply by closing the manual gas reset switches that act to cut power to the interlock valve on the unit.
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Page 118: Section 13 Troubleshooting
LAARS Heating Systems Page 118 SECTION 13 Troubleshooting 13.A Error Codes Condition Information Corrective Action Flow Switch • Insufficient flow at the outlet of the • Faulty boiler/heater pump – boiler/heater replace pump. Auto-reset Condition Faulty pump contactor – replace •... - Page 119 HERM Page 119 Condition Information Corrective Action Verify supply and manifold gas • Lockout: Low Gas Pressure pressures satisfy installation requirements. Condensate Condensate trap water level is high Check condensate trap for • • Level proper drainage • Auto-reset Condition Check condensate trap for stuck Annunciation –...
- Page 120 LAARS Heating Systems Page 120 Error Codes (continued) Condition Information Corrective Action 3563 7139 2463 4937 1739 3489 1253 2514 1845 1376 Inlet Sensor • Inlet sensor is damaged or not • Check the sensor and wiring. connected. Repair or replace as needed. Manual-reset condition Measure the resistance of the •...
- Page 121 HERM Page 121 Condition Information Corrective Action Stack Stack sensor disconnected Check the sensor and wiring. • • Sensor Repair or replace as needed. Stack sensor wiring bad • The stack probe is a dual Thermistor elements bad • • element probe with 100K thermistors.
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Page 122: Section 14 Replacement Parts
LAARS Heating Systems Page 122 SECTION 14 Replacement Parts Final Assembly (Models 1250, 1500, 1750, 2000, 2500 and 3000) Use only genuine Manufacturer replacement parts. 14.A General Information To order or purchase parts, contact your nearest manufacturers dealer or distributor. (See the back cover of this manual for the manufacturers website). 14.B Component Illustrations, Parts Lists, and Part Numbers Final Assembly (Models 1250, 1500, 1750, 2000, 2500 and 3000) BACK VIEW... - Page 123 HERM Page 123 Jacket Assembly (Models 1250 and 1500) Parts List ITEM DESCRIPTION PART NUMBER PANEL, JACKET, REAR 150S3005 PANEL, ACCESS, FLUE 150S302601 FILTER ASSY, AIR INTAKE 150S2610 PANEL, JACKET, RIGHT 150S3006 PANEL, JACKET, LEFT 150S3007 PANEL, JACKET, TOP 150S3008 ACCESS PANEL 150S3013 DOOR ASSY, LOWER...
- Page 124 LAARS Heating Systems Page 124 Jacket Parts (Model 1750) PARTS LIST ITEM NO. DESCRIPTION PART NO. DOOR ASSY, DISPLAY 175S3102 DOOR ASSY, LOWER 175S3104 FILTER ASSY, AIR INTAKE 250S2500 PANEL, JACKET, RIGHT, LOWER 175S3002 PANEL, JACKET, LEFT, LOWER 175S3018 PANEL, JACKET, RIGHT, UPPER 175S3004 PANEL, JACKET, LEFT, UPPER 175S3016...
- Page 125 HERM Page 125 Jacket Parts (Models 2000 and 2500) PARTS LIST ITEM NO. DESCRIPTION PART NO. DOOR ASSY, LOWER 300S3104 DOOR ASSY, DISPLAY 300S3102 DOOR ASSEMBLY UPPER 250S3023 FILTER ASSY, AIR INTAKE 250S2500 PANEL, JACKET, LEFT, LOWER 300S3018 PANEL, SIDE, UPPER LEFT 250S3021 PANEL, JACKET, RIGHT, LOWER 300S3002...
- Page 126 LAARS Heating Systems Page 126 Jacket Parts (Model 3000) PARTS LIST ITEM NO. DESCRIPTION PART NO. DOOR ASSY, LOWER 300S3104 DOOR ASSY, DISPLAY 300S3102 DOOR ASSEMBLY UPPER 300S3118 FILTER ASSY, AIR INTAKE 300S2500 PANEL, JACKET, LEFT, LOWER 300S3018 PANEL, SIDE, UPPER LEFT 300S3016 PANEL, JACKET, RIGHT, LOWER 300S3002...
- Page 127 HERM Page 127 Control Panel Assembly (Models 1250, 1500, 1750, 2000, 2500 and 3000) Control Panel Assembly (Models 1250, 1500, 1750, 2000, 2500 and 3000) PARTS LIST ITEM DESCRIPTION PART NO. SWITCH, CUTOFF, LOW WATER E2387600 BOARD, CONTROL R2082700 TRANSFORMER ASSY, 120-24V, 75 VA 150S7019 FAN, COMPACT AC AXIAL E2392600 RELAY, REPLACEMENT, 110V, SLIM...
- Page 128 LAARS Heating Systems Page 128 Heat Exchanger Assembly (Models 1250 and 1500) SEE RFC TILE See Refractory WARNING Ceramic Fibers ON PAGE 7 Warning in Section "1.D Safety Notes" PARTS LIST ITEM DESCRIPTION 1250 1500 PART NO. SHROUD ASSEMBLY R2082901 125S2141 HEAT EXCHANGER 150S2141...
- Page 129 HERM Page 129 Heat Exchanger Assembly (Models 1750, 2000, 2500 and 3000) Heat Exchanger Assembly (Models 1750, 2000, 2500 and 3000) See Refractory Ceramic Fibers SEE RFC TILE Warning in WARNING Section "1.D Safety Notes" PARTS LIST ITEM DESCRIPTION 1750 2000 2500 3000...
- Page 130 LAARS Heating Systems Page 130 Gas Train Assembly (Models 1250 and 1500) CSD-1 Version NOTES: APPLY THREAD SEALANT TO ALL MALE NPT THREADS BEFORE ASSEMBLY O-RINGS INCLUDED WITH GAS VALVE. ITEM 6 FOR USE IN MASSACHUSETS Parts List QTY PART NO. DESCRIPTION ITEM NO.
- Page 131 HERM Page 131 Gas Train Assembly (Models 1750, 2000, 2500 and 3000) CSD-1 Version NOTES: APPLY THREAD SEALANT TO ALL MALE NPT THREADS BEFORE ASSEMBLY O-RINGS INCLUDED WITH GAS VALVE ITEM 6 FOR USE IN MASSACHUSETS PARTS LIST ITEM 1750-2500 3000 PART NO. DESCRIPTION R2004000 SWITCH, HIGH GAS PRESSURE V2026300...
- Page 132 LAARS Heating Systems Page 132 Blower Burner Assembly (Models 1250 and 1500) Parts List ITEM DESCRIPTION 1250 1500 BURNER L2018804 GASKET, BURNER FLANGE S2132900 GASKET, IGNITER-SENSOR S2131900 BACKER PLATE, GASKET, IGNITER-SENSOR 150S5048 IGNITER-FLAME SENSE (includes gaskets and hardware) R2083000 SCREW, 10-32 x 1/2" SHCS, ZINC F2057200 GASKET, BURNER S2131100...
- Page 133 HERM Page 133 Blower Burner Assembly (Models 1750, 2000 and 2500) PART NUMBERS ITEM DESCRIPTION SIZE 1750 SIZE 2000 SIZE 2500 BURNER L2021803 L2021801 L2021801 300S2020 GASKET, BURNER 300S2019 GASKET, ADAPTER FLANGE R2083100 IGNITOR, SPARK, WITH FLAME SENSOR F2057300 SCREW, 8-32 x .375", SHCS, ZINC 400S6904 GASKET, BLOWER OUTLET FLANGE BLOWER, 120V MODELS...
- Page 134 LAARS Heating Systems Page 134 Blower Burner Assembly (Model 3000) PART NUMBERS ITEM DESCRIPTION BURNER L2021802 GASKET, BURNER 300S2020 GASKET, ADAPTER FLANGE 300S2019 IGNITOR, SPARK, WITH FLAME SENSOR R2083100 GASKET, BLOWER OUTLET FLANGE 400S6904 BLOWER, 208V MODEL A2133900 BLOWER, 480-600V MODELS A2133901 O-RING, BLOWER 300S5039...
- Page 135 HERM Page 135 AC Distribution Box (Models 1250 and 1500) 220/240V SECONDARY H1 - H4 PRIMARY X1 - X4 208V Bill of Material ITEM 208V 1Ø 220/240V DESCRIPTION PART NO. 1Ø QTY CIRCUIT BREAKER, 7 AMP, PANEL MOUNT E2378600 DIN RAIL ASSY, 208/220/240V 1Ø 300S731702 TRANSFORMER, 208 X 416 PRIM, 120 X 240 SEC, 500 VA, 50/60HZ E2385300...
- Page 136 LAARS Heating Systems Page 136 AC Distribution Box, Single Phase (Models 1750, 2000 and 2500) AC Distribution Box, Single Phase (Models 1750, 2000 and 2500) PARTS TABLE AC DISTRIBUTION BOX, 1Ø, MODELS 1750, 2000, AND 2500 ITEM 120V 208V 220/240V DESCRIPTION PART NO.
- Page 137 HERM Page 137 AC Distribution Box, Three Phase (Model 2500) PARTS TABLE AC DISTRIBUTION BOX, 3Ø, MODELS 2500 ITEM 208V 480V 575/600V DESCRIPTION PART NO. FAN, AXIAL, 4-11/16" SQUARE, 1-1/2" DEEP, 115VAC E2376300 TRANSFORMER, 208 X 416 PRIM, 120 X 240 SEC, 500 VA, 50/60HZ E2385300 TRANSFORMER, HPS, SP2000ACP, Prim 600/480V, Sec 120x240 E2382900...
- Page 138 LAARS Heating Systems Page 138 AC Distribution Box, (Model 3000) 11 10 PARTS TABLE AC DISTRIBUTION BOX, MODEL 3000 ITEM NO. DESCRIPTION 208V 480V 600V PART NO. TRANSFORMER, HPS, P006QKKF, Prim 600/480V, Sec E2383300 480Y/277V TRANSFORMER, 208 X 416 PRIM, 120 X 240 SEC, 500 VA, E2385300 50/60HZ TRANSFORMER, HPS, SP500ACP, Prim 600/480V, Sec 120x240...
- Page 139 HERM Page 139 Water Outlet Assembly (Models 1250 and 1500) Water Outlet Assembly (Models 1250 and 1500) PARTS LIST ITEM HYDRONIC VOL WAT DESCRIPTION PART NO. PARTS LIST VALVE, SHUT OFF, 3/4" NPT, BRASS R10-143 ITEM HYDRONIC VOL WAT FLOW SWITCH KIT 150S4030 DESCRIPTION PART NO.
- Page 140 HERM Water Outlet Assembly (Models 1750, 2000, 2500 and 3000) Water Outlet Assembly (Models 1750, 2000, 2500 and 3000) All Manuals (Install & Operate, Start Up, and Service Manuals) can be downloaded at www.laars.com For Laars Product and Service VIDEOS https://www.youtube.c o m / user/laarsHeating PARTS LIST...