Laars FT Series Installation And Operation Instruction Manual
Wall-mounted modulating condensing gas boiler (includes optional floor stand accessory information)
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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 appliance.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• 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
Wall-Mounted Modulating Condensing
Gas Boiler (Includes Optional Floor
Stand Accessory Information)
Model FTHW301 and FTHW399
•
•
WARNING
Natural Gas (NG) - Factory Configuration
Propane - Field-Convertible
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 ou ni
d'autres vapeurs ou liquides inflammables dans
le à proximité de cet appareil ou de tout autre
appareil.
QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE
• Ne pas tenter d'allumer d'appareils.
• Ne touchez à aucun interrupteur. Ne pas vous servir
des téléphones dans le bâtiment où vous vous
trovez.
• 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 sservice 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 1538D
AVERTISSEMENT
GAZ:
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Summary of Contents for Laars FT Series
- Page 1 Installation and Operation Instructions Document 1538D Installation and Operation Instructions for Wall-Mounted Modulating Condensing Gas Boiler (Includes Optional Floor Stand Accessory Information) Model FTHW301 and FTHW399 Natural Gas (NG) - Factory Configuration • • Propane - Field-Convertible 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.
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Page 2: Table Of Contents
Page 2 TABLE OF CONTENTS SECTION 1 Introduction About this Installation Manual ........3 4.14 High Altitude Installations. 2,000’ to 10,000’ ....40 Included in the Box ............4 4.15 Natural Gas to Propane Conversion ......41 4.16 Adjusting Combustion ..........44 4.17 Plumbing and Wiring Guidelines ......46 SECTION 2 Product Characteristics 4.17.1 Single wall-mounted boiler with DHW heating ..48 Model Number ............5... -
Page 3: Introduction About This Installation Manual
The FT Series 301 / 399 Heating Only Boiler Page 3 SECTION 1 Introduction About this Installation Manual For details on Plumbing for Central Heat (see page 46 to page 57) For details on Combustion Air and Venting, (pages 17-29) -
Page 4: Included In The Box
Page 4 Included in the Box Item Description Item Description Documents Wall Mounted Package Heating Only (I/O manual and Boiler warranty) Package, Outdoor Sensor Package, and Silicone Two Mesh tubing for air relief Screens on condensate 3” Dia. trap, velcro strap and condensate hose Propane... -
Page 5: Section 2 Product Characteristics Model Number
The FT Series 301 / 399 Heating Only Boiler Page 5 SECTION 2 Product Characteristics Model Number / Model Number Rating Plate The Model Number is shown on your Rating Plate and consists of a series of letters and numbers (Nomenclature) that further identifies the characteristics of your FTHW Heating Only Boiler. -
Page 6: Specifications
Page 6 Specifications Specifications, 301 2.3.1 FTHW301NX Model Name 301,000 Btu/h Gas Input Rate 39,900 Btu/h Indoor / Wall-mounted or floor (requires floor stand) Installation boiler Sealed Combustion Direct / Single Vent / Concentric Flue System Vent 3”(65 ft), 4” (150 ft) Schedule 40 CPVC, PP, PVC, Vent Run Stainless Steel, PP Flex 6.55 mm (0.258”) - Page 7 The FT Series 301 / 399 Heating Only Boiler Page 7 Specifications, 399 2.3.2 FTHW399NX Model Name 399,000 Btu/h Gas Input Rate 39,900 Btu/h Indoor / wall-mounted or Floor (requires floor stand) Installation Sealed Combustion Direct / Single Vent / Concentric...
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Page 8: Names Of Components
Page 8 Names of Components Item # Description Boiler Return Connection Boiler Supply Connection Vent Pipe Collar Combustion Test Port Air Intake Collar Air Intake Screen Gas Inlet Connector Supply Gas Pressure Test Port Blower Air/Gas Venturi Air Intake Attenuator Gas Valve Internal Exhaust Pipe Sensor, Flue Gas Temperature... -
Page 9: Product Flow Paths And Characteristics
The FT Series 301 / 399 Heating Only Boiler Page 9 Product Flow Paths and Characteristics Central Heating flow. Boiler Heating Mode. 2.5.1 This boiler has top and bottom return and supply water connections. Place the combo brass adaptor fitting on the upper left supply connection. Use at least one of the CH return and CH supply connections. -
Page 10: Section 3 Safety Regulations Safety Symbols
Page 10 SECTION 3 Safety Regulations WARNING Safety Symbols FOR YOUR SAFETY READ BEFORE This manual provides Safety Symbols. When the user OPERATING fails to adhere to the following requirement, it may If you do not follow these instructions exactly, a fire cause death, serious injury, and substantial property or explosion could result causing property damage, damage. - Page 11 The FT Series 301 / 399 Heating Only Boiler Page 11 This appliance must be installed in accordance with Be aware of the location of the gas shut-off valve local codes if any; if not, follow ANSI Z224.1/NFPA and operation method. Close the gas shut-off valve 54 or CAN/CSA B149.1, Natural Gas and Propane...
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Page 12: Before Operation
Page 12 Before Operation WARNING Note: FTHW301/399 is factory built for Natural Gas. Do not use the appliance for any other purpose For use with Propane, refer to Section 4.15 than for space heating and DHW heating using an indirect boiler tank. Natural Gas to Propane Conversion. -
Page 13: Section 4 Installation
The FT Series 301 / 399 Heating Only Boiler Page 13 WARNING SECTION 4 Installation The K1 Series Floor Standing and Wall Mounted, Heating Only Boiler Page 13 ▪ Installations must comply with • All the local, state, provincial, and national codes, laws, NOTE: For Cascading Installations, regulations and ordinances. -
Page 14: Wall Mount Bracket
Page 14 4.1.1 Wall Mount Bracket Mounting Location Preparation 4.1.3 Hang the Boiler 4.1.2 • Remove the front door of the boiler. The installation height and location for your FT depends on your installation scenario. With all • Lift the boiler up with at least 2 people, align the clearances considered, and given adequate Hangers on the back of the boiler with the knife edge positioning for air supply and venting, you will need to... -
Page 15: Location And Clearances For Boiler
The FT Series 301 / 399 Heating Only Boiler Page 15 Location and Clearances for Boiler WARNING with Optional Floor Stand (Part #: 4AC1000) Installations must comply with • All the local, state, provincial, and national codes, The boiler must be installed on a level surface of laws, regulations and ordinances. -
Page 16: Flooring & Leveling
Page 16 Flooring & Leveling : Installing the FTHW301/399 on the floor. 4.2.1 WARNING Make sure that the floor and structure of the installation location are sufficient to support the full installed weight of the boiler, including water content of the heat exchanger and related piping. Failure to ensure the floor and structure of the installation location are structurally sound before installation of the boiler can result in structural failure, substantial property damage, severe personal injury, or death. -
Page 17: Combustion Air
The FT Series 301 / 399 Heating Only Boiler Page 17 Combustion Air FTHW 301/399 boilers must have provisions for vertical or horizontal duct to the outdoors or spaces combustion and ventilation air in accordance with the that directly communicate with the outdoors and shall... - Page 18 Page 18 NOTICE AVIS The instructions for the installation of the venting Les instructions d'installation du système system shall specify that the horizontal portions of d'évacuation doivent préciser que les sections the venting system shall be supported to prevent horizontales doivent être supportées pour prévenir sagging;...
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Page 19: Venting (Exhaust)
The FT Series 301 / 399 Heating Only Boiler Page 19 Venting (Exhaust) WARNING All venting must be installed according to this NOTICE manual and any other applicable local codes, including but not limited to, ANSI Z223.1/NFPA DO NOT COMMON VENT FT UNITS WITH OTHER MAKES OF BOILERS. -
Page 20: General Location Guideline
Page 20 Venting system components can only WARNING be mixed with alternate manufacturers Failure to vent this Boiler in accordance with these certified components when clearly listed instructions could cause a fire, resulting in severe in the Boiler manufacturers Installation property damage, personal injury or death. -
Page 21: Locations For Vent Pipe Terminator
The FT Series 301 / 399 Heating Only Boiler Page 21 Locations for Vent Pipe Terminator Canadian Installations U.S. Installations A = Clearance above grade, veranda, porch, deck, or balcony ● 6 in (15 cm) for appliances ≤ 10,000 Btuh (3 kW) ●... -
Page 22: Venting Requirements In The Massachusetts
Page 22 Venting Requirements in the 4.6.1 Commonwealth of Massachusetts In Massachusetts the following items are required if Inspection The state or local gas inspector of the the side-wall exhaust vent termination is less than side-wall horizontally vented gas fueled appliance shall seven (7) feet above finished grade in the area of not approve the installation unless, upon inspection, the venting, including but not limited to decks and... -
Page 23: Air Supply And Vent Connections
The FT Series 301 / 399 Heating Only Boiler Page 23 Air Supply and Vent Connections Vent / Air Pipe Lengths for dual pipe venting systems. 4.7.1 3” Combustion Air or Vent Pipe 4” Combustion Air or Vent Pipe Min. -
Page 24: Indoor Combustion Air
Page 24 Indoor Combustion Air Short pipe shown is not required. Included 3” PVC Screen fits coupler hub size 3.5” ID. Read and follow section 4.5.1 Guidelines first. 1. Insert the termination end cap into the intake air duct. 2. Provide two openings to allow for circulation of combustion air as specified by ANSI Z223.1/NFPA 54. -
Page 25: Horizontal Vent Termination
The FT Series 301 / 399 Heating Only Boiler Page 25 Vent / Air Pipe Terminations (continued) (Direct Vent - Sidewall Termination) 4.9.2 Horizontal Vent Termination Note: For cases Exterior Wall A thru C below, Vent Screens are required the location of... -
Page 26: Low Profile Two-Pipe Sidewall Venting
Page 26 Low Profile Two-Pipe 4.9.3 Sidewall Venting NOTICE Follow the manufacturer’s installation guidelines included with the Low Profile Vent Termination Kit for installation requirements and guidelines. Failure to provide properly separated combustion air and exhaust air will result in flue gas cross-contamination which will cause shut-downs and ignition failures. -
Page 27: Flexible Vent Systems
The FT Series 301 / 399 Heating Only Boiler Page 27 Flexible Vent Systems 4.9.4 Using flexible polypropylene in an existing vertical chimney. NOTE : Only VERTICAL installations are allowed. Horizontal terminations are prohibited. The use of proper adapters and supports are required to fully complete the installation. -
Page 28: Concentric Vent Termination
Page 28 • Direct Vent - Optional Side wall Terminations Exter 4.9.5 Concentric Vent Termination • Direct Vent - Optional Horizontal Exterior Wall and Vertical Concentric Vent using 3” or 4” Side Wall Kit intake air and exhaust vent pipes. (2”... -
Page 29: Common Vent Test
The FT Series 301 / 399 Heating Only Boiler Page 29 4.10 Common Vent Test NOTE: This section does not describe a method for common venting FT units. It describes what must be done when an existing unit is removed from a common vent system. -
Page 30: Common Vent System
Page 30 4.11 Common Vent System WARNING Improper venting of the boilers can result in excessive levels of carbon monoxide, which can lead to severe personal injury or death. The boilers must be vented in accordance with the “Venting of Equipment”... -
Page 31: Determining The Common Vent Length
The FT Series 301 / 399 Heating Only Boiler Page 31 ■ Risk Guidelines • Horizontal vent pipe runs must be supported every 4 • Ensure that all common venting system components feet (1.2 m) (minimum). are manufactured and installed in accordance with •... -
Page 32: Common Vent Materials
WARNING: Only PP and PP Flex materials are allowed by ETL for use on the exhaust and intake venting of FT Series boiler common vent systems. Do not mix components from different manufacturers in either the exhaust or intake venting. -
Page 33: Sizing A Common Vent System
The FT Series 301 / 399 Heating Only Boiler Page 33 4.11.6 Sizing a Common Vent System made to minimize the lengths of these portions of the Vents can be installed in a vertical or horizontal vent system. They should not exceed 5 feet of vent orientation. - Page 34 Page 34 Common Vent Systems (continued) Flex Vent / Vertical Intake Air Flex Vent / Horizontal Intake Air Vertical Tee Termination / Horizontal Intake Air Must use Item #8 from Section 4.11.5 Flex Vent / Room Intake Air...
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Page 35: Common Vent Kits
The FT Series 301 / 399 Heating Only Boiler Page 35 4.11.8 Common Vent Kits Ball Valve Siphon ADDITIONAL - NON-RETURN VALVE KIT: D2027800 (REQUIRED IN CANADA) ADDITIONAL - NON-RETURN VALVE KIT: D2027800 (REQUIRED IN CANADA) -
Page 36: Gas Supply And Piping
Page 36 4.12 Gas Supply and Piping Schedule 40 Metal Pipe Capacity for Gas piping should be supported by suitable hangers or 1.6 Specific Gravity Undiluted Propane floor stands, near the appliance. Nominal Pipe Size @ 11” W.C. Inlet Review the following instructions before proceeding with and 0.5”... - Page 37 The FT Series 301 / 399 Heating Only Boiler Page 37 Gas Supply and Piping (continued) The manual gas shut-off valve in the gas supply The gas connection fitting is, 1” male NPT. line should be installed close to the unit as shown The FT boiler is standard equipped with top and below.
- Page 38 Page 38 Suggested Natural Gas (NG) Layout NOTE: Total gas supply capacity must not be less than the total demand capacity of the connected appliances. Gas Regulator (Supply Press 12˝ ) Suggested Propane Layout NOTE: Total gas supply capacity must not be less than the total demand capacity of the connected appliances.
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Page 39: Gas Supply Pressure
The FT Series 301 / 399 Heating Only Boiler Page 39 4.13 Gas Supply Pressure Supply Gas INLET port Refer to NOTE (below) for gas pressure reading. Gas Valve Adjustment Port Do Not Adjust without using a combustion analyzer to verify adjustment. Adjust ONLY when in MIN Fire and when using a combustion analyser. -
Page 40: High Altitude Installations. 2,000' To 10,000
Page 40 4.14 High Altitude Installations. 2,000’ to 10,000’ NOTE: For installations above 5,000’, a high altitude conversion kit must also be installed. See Table 13 The FT is shipped with a default factory setting for installation at an altitude of 0 to 2,000’ (approx). For installations at altitudes above 2,000’... -
Page 41: Natural Gas To Propane Conversion
The FT Series 301 / 399 Heating Only Boiler Page 41 ORIFICE PACKING 4.15 Natural Gas to Propane Conversion WARNING AVERTISSEMENT Cette conversion doit être installée par un installateur This conversion shall be installed by a qualifi ed installer, qualifi é, une agence de service ou le fournisseur de gaz service agency, or the gas supplier in accordance with the conformément aux instructions du fabricant et à... - Page 42 Page 42 4.15 Natural Gas to Propane Conversion (continued) Natural Gas (NG) Propane Orifice Model Part # FT4143 Part # FT4119 FTHW301 6.55 mm (0.258") 5.40 mm (0.216") Part # FT4118 Part # FT4119 FTHW399 6.7 mm (0.264") 5.40 mm (0.216") Table 14.
- Page 43 The FT Series 301 / 399 Heating Only Boiler Page 43 MIN Fire Normal Operation MAX Fire Normal Operation Natural (NG) Propane DHW System Smart Priority Regular Priority Model Size Table 15. DIP Switch #5 for Gas Type Shown is a Model 301 Natural Gas with 4” Venting.
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Page 44: Adjusting Combustion
Page 44 4.16 Adjusting Combustion 1. Remove the front cover by opening the four clips on the boiler front cover - (2 top, 2 bottom) pick up Note: When in Low Fire the burner should remain the cover and lift the cover off. on. - Page 45 The FT Series 301 / 399 Heating Only Boiler Page 45 Propane Manifold Pressure Natural Gas 3” VENT 4” VENT 3” VENT 4” VENT -0.28” WC -0.28” WC -0.28” WC -0.28” WC Max Fire FTHW301 -0.015” WC -0.015” WC -0.015” WC -0.015”...
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Page 46: Plumbing And Wiring Guidelines
Page 46 4.17 Plumbing and Wiring Guidelines This Section will show the basic plumbing diagrams AND also the electrical connections for three (3) common installation configurations. Plumbing and Electrical Connections Piping diagrams will have a legend. And the electrical connections will show the devices. - Page 47 The FT Series 301 / 399 Heating Only Boiler Page 47 Photo 6. Low Voltage Photo 7. Low Voltage, Sensors...
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Page 48: Single Wall-Mounted Boiler With Dhw Heating
Page 48 4.17.1 Single wall-mounted boiler with DHW heating and high and low temperature zones w/ 24 V motorized mixing valve. Plumbing 4.17.1.a 1. This piping diagram is meant to show system piping 5. The FTHW boiler has two heating zone inputs. Two concept only. - Page 49 The FT Series 301 / 399 Heating Only Boiler Page 49 4.17.1.b Wiring, Single wall-mounted boiler with DHW heating and high and low temperature zones w/ motorized mixing valve. From 120VAC Circuit Panel 24 VAC Max: 1.6 Amp per pump output...
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Page 50: Floor Stand Application: Zoning With Zone Valves
Page 50 4.17.2 Floor stand application: Zoning with zone valves and indirect DHW tank pump. Plumbing 4.17.2.a 1. This piping diagram is meant to show system piping concept only. Installer is responsible for all equipment and detailing required by local codes. 2. - Page 51 The FT Series 301 / 399 Heating Only Boiler Page 51 4.17.2.b Wiring with zone valves and indirect DHW tank THERMOSTAT THERMOSTAT THERMOSTAT 24 VAC INPUT MODE ZONE 4 PRIORITY NORMAL POWER IN RESET ZONE 1 ZONE 2 ZONE 3...
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Page 52: Cascade System With Separate Controls
The DHW Pumps B4-P4 & B3-P4 must be sized for the DHW Indirect require flow rate and Total Head Loss through the DHW Indirect coil, piping, and respective Boiler B4 & B3 head loss. NOTE: Cascading the FT 301/399 FT Series (document #1548) can be found online at the manufacturer’s website. - Page 53 The FT Series 301 / 399 Heating Only Boiler Page 53 4.17.3.b Wiring of cascade system with separate control of space heating and DHW heating NOTE: Cascading the FT 301/399 FT Series (document #1548) can be found online at the manufacturers website.
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Page 54: Applicable Backflow Preventer
Page 54 CAUTION - Ensure pipe material meets local codes and industry standards. The FTHW301/399 boiler is equipped with top and bottom water connections. Return - The pipe end must be clean and free of debris. connections are located on the right side; supply connections are located on the left side - Do not apply torch heat within 12˝... -
Page 55: Primary/Secondary Piping
The FT Series 301 / 399 Heating Only Boiler Page 55 )*+,-#./0,#!-,..1-,#2-34 Water side Pressure Drop '#"! 12.0 '!"! 10.0 &"! %"! $"! #"! !"! !"! #"! $!"! 10.0 $#"! 15.0 %!"! 20.0 %#"! 25.0 &!"! 30.0 &#"! 35.0 742)(,89.:,0;'<6 Water Flow (GPM) Figure 9. -
Page 56: Pressure Relief Valve
Page 56 4.21 Pressure Relief Valve External pressure relief valve must be installed. This appliance has a high-temperature shut off switch Observe the following. Failure to comply with the built in as a standard safety feature. Therefore a “pressure only” relief valve is required. guidelines on installing the pressure relief valve and discharge piping can result in personal injury, death or substantial property damage. -
Page 57: Disposal Of Condensate
The FT Series 301 / 399 Heating Only Boiler Page 57 4.22 Disposal of Condensate • High efficiency gas condensing boilers create NOTICE condensation when operating. Condensation is acidic Category II & IV boilers must be installed with a means with a pH ranging from 4 to 5. -
Page 58: Electrical Wiring Connections
Page 58 4.23 Electrical Wiring Connections FTHW 301/399 Boiler Electrical Circuit Requirement: 120VAC, 15 Amps, Single-Phase. 120 V field wiring connects to the bottom terminals on the 120 V strip. Pump connections: Max 120 V, 1.6 Amps. Note: For pumps over 1.6 Amps, use 120V isolation relay/starter and separate pump power circuit. Low voltage field wiring connects to the upper terminals on the low voltage terminals. -
Page 59: Dip Switches
The FT Series 301 / 399 Heating Only Boiler Page 59 The DIP Switches are 4.24 DIP Switches located at the bottom of the Printed Circuit Board (PCB). The PCB faces forward at the inside of the boiler. Remove the cover to locate the PCB. -
Page 60: Control Board, Electrical Diagram
Page 60 4.25 Control Board, Electrical Diagram Control Board, NGTB-1000C (399 MBH) -
Page 61: Ladder Diagram
The FT Series 301 / 399 Heating Only Boiler Page 61 4.26 Ladder Diagram... -
Page 62: Electrical Connections, (Table)
Page 62 4.27 Electrical Connections, (table) Connector HT SELV Description #, Location, Type Label data (-) RS485 data (+) SMW250-03D (BMS) VCC(5V) SMW250-06D LWD1140-06 MOTOR DC 24V L T/T OP Water Temperature Sensor DHW Temperature Sensor Return Temperature Sensor Exhaust Temperature Sensor L T/T Temperature Sensor System Sensor(or Over-Heat) Temperature... - Page 63 The FT Series 301 / 399 Heating Only Boiler Page 63 Connector HT SELV Description #, Location, Type Label CN10 LW6A4-03 PAPST Earth Flame Rod COM LW COM Sensor Thermostat(+) VCC(5V) VCC(12V) High Limit VCC(12V) CN11 Safety LWD1140-16 High Water Level...
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Page 64: Section 5 Control Display And Operation
Page 64 SECTION 5 Control Display and Operation Control Dial and Buttons (Status Light) (Constant green when operating normally) The Control Display The Control Display has a Control Dial (E), 4 Buttons (A,B,C,D), and a Liquid Crystal Display (with 72 back lit segments). This section of this manual gives instruction on how to navigate into the many functions of the Boiler and to change temperature set points, set system variables and controller parameters. -
Page 65: Lcd Overview
The FT Series 301 / 399 Heating Only Boiler Page 65 LCD Overview Symbol Name Description Service Reminder Mode Service Reminder Mode Indication Outside Temperature Mode Outside Temp Setting Indication Anti-freeze Mode Anti-Freeze Mode Indication Storage Mode Storage Mode Indication... -
Page 66: Operating Mode
Page 66 Operating Mode Operating Mode After the Power is turned on, and/or the Control Display is turned on , the Control Display will go through a ‘Start Up’ checklist and briefly show a sequence of diagnostic codes before entering into the ‘Operating Mode’. It will then display the following information. -
Page 67: Setting The Clock
The FT Series 301 / 399 Heating Only Boiler Page 67 Setting the Clock P-953EH The P-953EH Control Display does NOT have a daily timer or programmable thermostat. Setting the Clock. Press and hold the ‘Clock button’ for about 5 seconds. Set the ‘Year’ by turning the dial . -
Page 68: Set Point Change Mode
Page 68 CH Set Point Change Mode ▪ CH set point Change Mode (This mode is only functional when the outdoor sensor (O/S) is not connected.) ▪ In accordance with the United States Energy Policy and Conservation Act, this boiler is equipped with outdoor reset capability, a feature that saves energy by reducing boiler water temperature as heating load decreases Refer to Section 5.9 regarding the O/S details. -
Page 69: Status Display Mode
The FT Series 301 / 399 Heating Only Boiler Page 69 Status Display Mode To view any Status Parameter, P-953EH Press and Hold Button B to get into the Status Display Mode. Rotate Dial E until you find the Parameter that you wish to view. -
Page 70: Installer Mode
Page 70 Installer Mode These changes are to be made only by a qualified technician. WARNING For Low temperature heating applications, adjust P6 to P-953EH desired value. For cascade applications, adjust P31 to desired water temperature. Call Technical services for assistance in changing settings. - Page 71 “29: CP” has to be set with the total number of units in the cascade 27: Cn Cascade Number before “28: Cn” can be set. Cascading the FT 301/399 FT Series (document #1548) can be found online at the manufacturers website. 28: CP Cascade Parameter Number of units cascaded.
- Page 72 Page 72 5.7 Installer Mode (continued) Internal CH Pump, CH This function sets the time to run both the Internal CH and AP:cP Internal DHW Storage pumps to purge air from the system. 5 Min Pump and DHW Indirect Range: 1 - 30 minutes Pump Test Mode Turn this function on to activate Internal CH and CH pump P1:oF or...
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Page 73: Dhw Indirect Storage Mode
The FT Series 301 / 399 Heating Only Boiler Page 73 DHW Indirect Storage Mode P-953EH To change Storage Mode Temp, First turn OFF the power to the Control Display. Then Press and Hold Button B to get into the Installer Mode. -
Page 74: Outdoor Reset Adjustment
Page 74 Outdoor Reset Adjustment Outdoor Reset varies the control set point based on the outdoor temperature. The reset function works as shown in Figure ‘CH Outdoor Reset’. When the outdoor 4:OH “Maximum outdoor air temperature reaches temperature set point”, the control point setting is adjusted 7:cL “Minimum boiler temperature set point”. -
Page 75: Error Mode
The FT Series 301 / 399 Heating Only Boiler Page 75 5.11 Error Mode The Control Display will show the following information when an Error is presented. P-953EH Flashing Indicate Indicator Er:11 Error ‘Er:’ sign Segment Er:11 Error Code If Communication state is activated Note: When communication between the Control Display and the main controller is lost, the will not be displayed. -
Page 76: Modbus Memory Map
Page 76 5.12.1 Modbus Memory Map ModBus Display Type Name Description Units Notes Address Parameter Read Only Firmware Version The firmware version of the control board. C:It Input Temp The CH water return temperature. Celsius Only E:oP Current Boiler Supply Temp The CH water supply temperature. - Page 77 L: rt 1:PH Time For Supply Power The total time the unit has been powered. Hours The FT Series 301 / 399 Heating Only Boiler Page 77 L: rt 2:rh 3:rH Time For Burner Operation The total burner operation time.
- Page 78 Page 78 5.12.2 BACnet Memory Map BACnet BACnet Display Object Data Name Description Units Notes Parameter Type Read Only Firmware Version The firmware version of the control board. C:It Input Temp The CH water return temperature. E:oP Current Boiler Supply Temp The CH water supply temperature.
- Page 79 Previous error 6. Before Error Code 7 Previous error 7. 1:EH Before Error Code 8 Previous error 8. The FT Series 301 / 399 Heating Only Boiler Before Error Code 9 Previous error 9. Page 79 1:EH Before Error Code 10 Previous error 10.
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Page 80: Section 6 Error Codes Error Code Tables
Page 80 SECTION 6 Error Codes Error Code Tables Error Error Code Recover Possible Remedies Code Description methods Press the Power button to clear the Error Code. If Error happens again: 1. Monitor the gas pressure to the appliance while in operation. Ensure pressure is between 3.5” to 10.5” WC (Nat. - Page 81 The FT Series 301 / 399 Heating Only Boiler Page 81 Error Code Tables (continued) Error Error Code Recover Possible Remedies Code Description methods This Error Code will go away when L-tt temperature decreases. If Error happens again: L-tt sensor 1.
- Page 82 Page 82 Error Code Tables (continued) Error Error Code Recover Possible Remedies Code Description methods This Error Code will go away when the condition is remedied. If Error happens again: MCU self 1. Turn power OFF and ON at the main power switch internal to the appliance. Soft Lock diagnostics fault 2.
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Page 83: Fault Tree Analysis
The FT Series 301 / 399 Heating Only Boiler Page 83 Fault Tree Analysis 1. Flame detection... -
Page 84: Fault Tree Analysis (Cont)
Page 84 Fault Tree Analysis (cont) 2. Gas Detection 3. ‘Storage’, ‘DHW’, ‘OP’, ‘CH overheat’, ‘Exhaust heat’ Sensor detects Error code contents DHW NTC open or short OP NTC open or short Exhaust NTC open or short... -
Page 85: Section 7 Trouble Shooting
The FT Series 301 / 399 Heating Only Boiler Page 85 SECTION 7 Trouble Shooting Diagnostics Question Answer The blower is still operat- This is normal because the blower keeps operating for 1 minute to vent (exhaust) the flue gas ing after the combustion from the chamber once the combustion has stopped. - Page 86 Page 86 7.2 Suggested Corrective Actions (continued) Fault Condition Diagnostic Corrective Action(s) Check all the temperature readings of the boiler on the DIAGNOSTICS - Occurs when TEMPERATURES menu to determine if any a temperature sensors are currently displayed as SHORT or sensor has OPEN.
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Page 87: Section 8 Maintenance
The FT Series 301 / 399 Heating Only Boiler Page 87 SECTION 8 Maintenance Maintenance procedures [ Daily ] Maintenance procedures [ Monthly ] - Check that the boiler front cover is closed. - Check the vent pipe. Visually inspect the flue gas vent piping for any... -
Page 88: Maintenance Procedures [Every 6 Months]
Page 88 Maintenance procedures SECTION 9 Installation Check [Every 6 Months] Quick View - Check the boiler piping (gas and water) Visually inspect for leaks around internal water Before Installing piping. Also inspect external water piping, - Make sure that there is enough space for installing circulators, relief valve and fittings. -
Page 89: Final Check Lists
The FT Series 301 / 399 Heating Only Boiler Page 89 Final Check Lists Final check: Installation Conditions. Final check: Condensate drain installation • Is the Boiler placed level on a floor with sufficient • Have you installed a condensate drain line from the... -
Page 90: Freeze Protection
Page 90 Freeze Protection The FTHW301/399 Boilers are certified for indoor WARNING use only, and are not design-certified for placement Do NOT use automotive antifreeze or outdoors. ethylene glycol. Use only inhibited propylene Proper precautions for freeze protection are glycol solutions which are specially recommended for boiler installations in areas where formulated for hydronic systems. -
Page 91: Section 10 Parts
The FT Series 301 / 399 Heating Only Boiler Page 91 Water Pipe Assemblies SECTION 10 Parts 33-1 33-2 33-3 36-1 Description Part Number Piping, Water Supply Ass’y FT4124 Piping, Water Supply Top Ass’y FT4032 Adapter, Water Supply Ass’y FT4033... - Page 92 Page 92 Gas Train and Blower Description Part Number Fan Ass’y, EBM FT4047 38-1 FT4048 Packing, Fan 38-2 FT4049 38-3 Damper, Body Assembly FT4160 38-4 Damper, Flap FT4051 B-13 Hex Head Bolt M5 x 12 Machine Hex Head M5 x 16 Machine Screw B-14 Venturi, Intake Pipe Ass’y FT4116...
- Page 93 The FT Series 301 / 399 Heating Only Boiler Page 93 Gas Train and Blower...
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Page 94: Casing Assembly
Sensor, CO FT4003 Bracket, Wall Mount Bottom FT4019 Bracket, Air Guide FT4004 Handle, Case Side FT4020 Bracket, Ignition FT4005 Cover, Front Assembly (Laars) FT4167 Ignition Transformer FT2031 Cover, Front Assembly (BW) FT4168 Bracket, HE Horizontal FT4006 Pad, Hex Support FT4007... - Page 95 The FT Series 301 / 399 Heating Only Boiler Page 95 Casing Assembly Case Assembly FT4023 M4 x 12MM Flange Bolt Truss Head Screw M4 x 12 Tapping M5 x 10 Flange Bolt Machine Hex Head M6 x 15 Flange Bolt...
- Page 96 Page 96 FTHW301/399 Heat Exchanger and Burner Assemblies Note: Set the burner nuts to a torque value of 56 lbf-in (4.7 lbs-ft) or 65 kgf.cm when tightening these nuts. Do not overtighten.
- Page 97 The FT Series 301 / 399 Heating Only Boiler Page 97 Heat Exchanger and Burner Assemblies Description Part Number Heat Exchanger Ass’y (301) FT4099 Heat Exchanger Ass’y (399) FT4101 Packing, Mix Chamber 45-1 FT4100 Burner Head, Mix Chamber Ass’y FT4073...
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Page 98: Accessory Items
Page 98 FTHW301/399 Accessory Items Description Part Number Pressure Relief Valve FT1500 Air Vent FT3117 Outdoor Temp. Sensor FT1501 Bird Screen 3” (Qty 2) FT1730 3 / 4 ” Brass Plug (Qty 2) FT3119 Brass Adaptor FT4129 1 / 2 FT4130 ”... - Page 99 The FT Series 301 / 399 Heating Only Boiler Page 99 Notes:...
- Page 100 The FT Series 301 / 399 Heating Only Boiler Notes: For Product and Service VIDEOS Dimensions and specifications subject to change without notice in accordance with our policy of continuous product improvement. 800.900.9276 • Fax 800.559.1583 Customer Service and Product Support:...
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