HTP ELU-85WBN Installation Start-Up Maintenance
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HTP ELU-85WBN Installation Start-Up Maintenance

High efficiency condensing wall-hung gas boilers
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Installation
Start-Up
Maintenance
ELU-85WBN
ELU-120WBN
ELU-120WCN
ELU-150WCN models
This manual must only be used by a qualified installer / service technician. Read all instructions in this manual before installing.
Perform steps in the given order. Failure to do so could result in substantial property damage, severe personal injury, or death.
Improper installation, adjustment, alteration, service, or maintenance could void product warranty and cause property
damage, severe personal injury, or death.
California Proposition 65 Warning: This product contains chemicals known to the State of California to cause cancer, birth
defects, or other reproductive harm.
The manufacturer reserves the right to make product changes or updates without notice and will not be held liable for
typographical errors in literature.
The surfaces of these products contacted by potable (consumable) water contain less than 0.25% lead by weight as
required by the Safe Drinking Water Act, Section 1417.
NOTE TO CONSUMER: PLEASE KEEP ALL INSTRUCTIONS FOR FUTURE REFERENCE.
272 Duchaine Blvd.
High Efficiency Condensing
Wall-Hung Gas Boilers
DANGER
!
WARNING
!
NOTICE
New Bedford, MA 02745
ELU
Heat Exchanger Bears the ASME "H" Stamp
www.htproducts.com
LP-700 Rev. 000 Rel. 002 Date 4.21.21

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Summary of Contents for HTP ELU-85WBN

  • Page 1 High Efficiency Condensing Wall-Hung Gas Boilers Installation Start-Up Maintenance ELU-85WBN ELU-120WBN ELU-120WCN ELU-150WCN models Heat Exchanger Bears the ASME “H” Stamp DANGER This manual must only be used by a qualified installer / service technician. Read all instructions in this manual before installing.
  • Page 2 WARNING WARNING: If the information in these instructions is not followed exactly, a fire or explosion may result causing property damage, personal injury or death. • 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 •...
  • Page 3 Installation should be made in accordance with the regulations of SPECIAL ATTENTION BOXES the Authority Having Jurisdiction, local code authorities, and utility The following defined terms are used throughout this manual to companies which pertain to this type of water heating equipment. bring attention to the presence of hazards of various risk levels or Authority Having Jurisdiction (AHJ) –...

  • Page 4: Table Of Contents

    In accordance with Section 325 (f) (3) of the Energy Policy and product in any manner other than described in this manual may Conservation Act, HTP has provided this boiler with multiple result in premature product failure, substantial property damage, features designed to save energy by reducing the boiler water severe personal injury, or death.

  • Page 5: Part 1 - General Safety Information

    Part 6 - Installing the Condensate Drain Part 1 - General Safety Information Part 7 - Connecting Electrical Service A. Wiring This boiler is approved for indoor installations only and is not intended 1. Removing the Power Cord (To Hard Wire the Boiler) for use as a pool heater.

  • Page 6: Improper Combustion

    DO NOT alter or modify the appliance or appliance controls. This boiler must be installed by a qualified service technician. Altering any HTP boiler with parts not manufactured by HTP WILL Improper installation and/or operation can cause a potentially INSTANTLY VOID the boiler warranty and could result in property hazardous situation, which if not avoided will void the warranty damage, personal injury, or death.

  • Page 7: Boiler System

    If you suspect that your water is contaminated in any way, discontinue loop CH applications. use of the appliance and contact an authorized technician or licensed NOTE: HTP DOES NOT WARRANT THE BOILER AGAINST FREEZE- professional. RELATED DAMAGE. The boiler control is equipped with freeze protection that activates based on internal water temperature.

  • Page 8: Water Temperature Adjustment And Scalding

    Freeze Protection Operation Condition Events Time • The internal pump operates at high speed. The water temperature Until the NTC1 and • The 3-Way Valve alternately switches positions - 1 minute on heating mode to Stage 1 NTC2 temperature detected by probes NTC1 1 minute on DHW mode or NTC2 ranges between is greater than or...

  • Page 9: Part 2 - Before You Start

    Connectivity Quick Start Guide LP Conversion Instructions Warranty Installation Quick Start Guide Replacement parts manual Template Piping Adapter Kit - ELU-85WBN 15-a 1 + 1 Gas Adapter 3/4” + 1 gas flat 15-b Gasket (2x1/2” + 2x3/4” + 1 x 1” ) 15-c Cap 1/2”...
  • Page 10 How the Boiler Operates ELU-150WCN / ELU-120WBN ELU condensing technology intelligently delivers hydronic heating while maximizing efficiency. Outlined below are system features and operation: Stainless Steel Heat Exchanger The highly efficient stainless steel heat exchanger is designed to extract all available heat from the supply line before it is exhausted. Modulating Combustion System The combustion system modulates the output of the burner during operation to match system demand and achieve the control set...

  • Page 11: Optional Equipment

    45 WARNING B. Optional Equipment Optional equipment available from HTP (and Part #): This boiler has a condensate disposal system that may freeze • Indirect Sensor (7250P-325) if exposed to sustained temperatures below 32 F.

  • Page 12: Leveling

    WARNING C. Clearances for Service Access NOTE: If you do not provide the minimum clearances shown in Failure to keep the boiler area clear and free of combustible Figure 5 and Table 6 it might not be possible to service the boiler materials, liquids, and vapors can result in substantial property without removing it from the space.

  • Page 13: Wall Mounting Considerations

    Boiler Area Ventilation Air Openings - Closet Installations E. Wall Mounting Instructions If the boiler is installed in a closet or alcove the boiler area/room must WARNING be ventilated. EXCEPTION: If the boiler area/room has a volume of 150 ft or greater, This boiler is too heavy for one person to lift.

  • Page 14: Mounting To A Wood Studded Wall

    After the plywood board has been installed to the studs, position the 2. Mounting to a Wood Studded Wall paper template on the plywood. CAUTION Locate the positions of the hanging bracket and piping adapter bracket. Position the wall mounting and piping adapter brackets. If the boiler is not installed upright, vertically plumb, and level, Ensure the brackets are level.

  • Page 15: Residential Garage And Closet Installations

    Equipment in Venting Section). The exhaust vent and intake piping F. Residential Garage and Closet Installations lengths, routing, and termination methods must all comply with the CAUTION methods and limits given in the Venting Section, this manual. When installing a combustion air intake from outdoors, care must Check with your local Authority Having Jurisdiction for requirements be taken to utilize uncontaminated combustion air.

  • Page 16: Prevent Combustion Air Contamination

    of qualified licensed professionals for the installation of hard wired carbon monoxide detectors. a. In the event that the vented gas fueled appliance is installed in a crawl space or attic, the hard wired carbon monoxide detector with alarm and battery back-up shall be installed on the next adjacent floor level.

  • Page 17: Technical Specifications

    K. Technical Specifications Model ELU-85WBN ELU-120WBN ELU-120WCN ELU-150WCN Type Boiler Combi Installation Indoor, Wall Hung, Fully Condensing Space Heating 9,400 / 85,000 13,200 / 120,000 11,200 / 106,000 13,200 / 120,000 Minimum / Maximum Input (Btu/Hr) Domestic Hot Water 11,200 / 114,000...
  • Page 18 4-3/4” 4-3/4” (120 mm) (120 mm) 15-3/4” (400 mm) 2-9/16” 2-5/8” 2-5/8” 2-9/16” (65mm) (67mm) (67mm) (65mm) 2-3/16” 3-7/16” 3-7/16” 3-7/16” 3-7/16” (55,3mm) 5-7/8” (87,2 mm) (87,6 mm) (87,6 mm) (87,2 mm) (150 mm) 15-5/16” (390 mm) Figure 10 - Boiler Dimensions - NOTE: All Dimensions Are Approximate Model ELU85WBN ELU120WBN...
  • Page 19 ELU85WBN - ELU120WBN Pressure relief valve Circulation Pump with auto air vent Air purge valve Water pressure switch Boiler outlet temperature sensor Modulating Fan Air pressure switch Boiler inlet temperature sensor Flue gas temperature sensor Frame Main heat exchanger Ignition electrode Flame detection electrode Spark generator Silencer...
  • Page 20 ELU120WCN - ELU150WCN Pressure relief valve CH circuit filter Air purge valve Circulation Pump with auto air vent Boiler outlet temperature sensor DHW Flow switch Air pressure switch Water pressure switch Flue gas temperature sensor Modulating Fan Main heat exchanger Boiler inlet temperature sensor Flame detection electrode Frame...
  • Page 21 ELU85WBN - ELU120WBN ELU120WCN - ELU150WCN °F °F Pressure relief valve Air purge valve Boiler outlet temperature sensor Air pressure switch Flue gas temperature sensor Main heat exchanger Flame detection electrode Silencer Junction box DHW heat exchanger Condensate trap Gas valve Control panel CH circuit filter Circulation Pump with auto air vent...

  • Page 22: Part 4 - Water Piping

    HTP offers indirect water heaters in a wide range of gallon Model Heat Exchanger Volume (Gallons) sizes in either stainless steel or glass-lined construction.
  • Page 23 Connect the 3/4” DHW inlet and outlet pipes. A shut-off valve between the city water supply and DHW inlet is recommended for ease of service. HTP offers threaded 3/4” DHW tankless isolation valves with a DHW pressure relief valve for ease of installation and future service.

  • Page 24: Internal Circulation Pump

    (ex: due to the response of thermostatic valves or zone valves). The by-pass valve is located: - in the left hydraulic block for ELU-85WBN and ELU-120WBN. - in the right hydraulic block , behind the three-way valve, for ELU120WCN and ELU150WCN...
  • Page 25 CH Loop DHW Loop (Combi Models) This boiler is provided with a CH pressure relief valve that complies The DHW piping must be provided with a DHW pressure relief valve with the ANSI/ASME Boiler and Pressure Vessel Code, Section IV that complies with local codes, but not less than valves certified (Heating Boilers).

  • Page 26: Air Elimination Device

    WARNING J. Applications* CAUTION Do not thread a cap or plug into the relief valve or relief valve line under any circumstances! Explosion and property damage, serious In mixed temperature applications, a mixing valve is required for the injury, or death may result. protection of low temperature loops.
  • Page 27 Cap this fitting when not in Primary/Secondary Piping Shown Figure 23 - ELUWBN with Single Central Heating Circulator NOTE: In piping applications utilizing a single zone, it is recommended that the installer use flow / check valves with weighted seats at or near the appliance to prevent gravity circulation.
  • Page 28 WARNING For direct (not primary / secondary) piping applications, the expansion vessel must be placed on the supply side of the boiler as illustrated. Placement of flow resticting devices, such as check valves, is prohibited between the boiler return and the expansion vessel. Failure to place the expansion vessel as instructed, may result in the release of the pressure relief valve, property damage, severe personal injury, or death.
  • Page 29 Cap this fitting when not in Primary/Secondary Piping is Required Figure 25 - ELUWBN with Multiple Central Heating Circulators NOTE: In piping applications utilizing a single zone, it is recommended that the installer use flow / check valves with weighted seats at or near the appliance to prevent gravity circulation.
  • Page 30 Primary/Secondary Piping Shown Figure 26 - ELUWCN with Single Central Heating Circulator NOTE: In piping applications utilizing a single zone, it is recommended that the installer use flow / check valves with weighted seats at or near the appliance to prevent gravity circulation. NOTICE Figure illustrates the basic plumbing requirements for an ELU-WBN boiler installation utilizing Primary/Secondary piping when the boiler circulator will not provide adequate flow for the system.
  • Page 31 WARNING For direct (not primary / secondary) piping applications, the expansion vessel must be placed on the supply side of the boiler as illustrated. Placement of flow resticting de- vices, such as check valves, is prohibited between the boiler return and the expansion vessel.
  • Page 32 In mixed temperature applications, a mixing valve is required for the protection of low temperature loops. Primary/Secondary Piping is Required Figure 28 - ELUWCN with Multiple Central Heating Circulators NOTE: In piping applications utilizing a single zone, it is recommended that the installer use flow / check valves with weighted seats at or near the appliance to prevent gravity circulation.

  • Page 33: Floor Drying Function

    K. Floor Drying Function The Floor Drying Function is a special function that allows the installer, through a dedicated heating cycle, to use the boiler for drying a freshly poured radiant floor during a floor system installation. The installer can set parameter 2.7.4 (Floor Drying Cycle) and choose the cycle‘s operation (Functional Heating, Curing Heating, a combination of Functional and Curing Heating, or Manual Heating).

  • Page 34: Part 5 - Venting

    Part 5 - Venting DANGER The boiler must be vented as detailed in this section. Ensure exhaust vent and intake piping complies with these instructions regarding vent system. Inspect finished exhaust vent and intake piping thoroughly to ensure all joints are well secured, airtight, and comply with all applicable code requirements, as well as the instructions provided in this manual.

  • Page 35: Approved Materials For Exhaust Vent And Intake Pipe

    B. Approved Materials for Exhaust Vent and Intake Pipe Standards for Installation In: Item Material United States Canada Pipe and Fittings Approved for Intake ONLY ABS* ANSI/ASTM D2661 ANSI/ASTM D2661 PVC Schedule 40/80 UL-1738 or ANSI/ASTM D1785 PVC-DWV Schedule 40/80 UL-1738 or ANSI/ASTM D2665 UL-1738 or ULC-S636 Pipe Approved for...

  • Page 36: Exhaust Vent And Intake Pipe Location

    D. Exhaust Vent and Intake Pipe Location INSIDE CORNER DETAIL FIXED OPERABLE CLOSED FIXED CLOSED OPERABLE LP-179-CC 03/28/17 Exhaust Vent Terminal Intake Pipe Terminal Area Where Intake Terminal Is Not Permitted Figure 29 - Exit Terminals for Direct Vent Systems - ANSI Z223.1 / NFPA 54 for US and CAN/CSA B149.1 for Canada DESCRIPTION CANADA Clearance above grade, veranda, porch, deck, or balcony...

  • Page 37: Exhaust Vent And Intake Pipe Sizing

    NOTE: Clean and dry the boiler connection. E. Exhaust Vent and Intake Pipe Sizing DO NOT use primer or cement on the boiler connection. 1. The factory ready exhaust vent and intake air pipe diameter is 2”. When preparing pipe for installation: The vent diameter can be increased to 3”...

  • Page 38: Exhaust Vent And Intake Pipe Installation

    2. If using the right side connection, remove the gear clamp from G. Exhaust Vent and Intake Pipe Installation the left side connection and install it on the right side. See Figure 33. WARNING WARNING All joints of positive pressure vent systems must be sealed You must cut out the plastic on the air intake connection being completely to prevent leakage of flue products into the living used before installing the air intake pipe.
  • Page 39 • Signage: Whenever any through-the-wall (horizontal or The following table lists optional exhaust/intake terminations sidewall) vent is installed less than seven feet above the available from HTP: finished grade, a metal or plastic identification plate shall Description Stock Code be permanently mounted to the exterior of the building at a minimum height of eight feet above grade directly in line 3”...

  • Page 40: Applications

    H. Applications 1. Direct Vent Installation of Exhaust and Intake If installing a direct vent option, combustion air must be drawn from the outdoors directly into the boiler intake, and exhaust must terminate outside. There are three basic direct vent options detailed in this manual: 1.
  • Page 41 Sidewall Venting Options - Direct Vent Installation Low Profile Termination Two Pipe Termination WARNING WARNING Exhaust must terminate a minimum of 18” above the air intake 3” IPEX Low Profile Termination illustrated. See Figure 40 for more termination. See Figure 39 for more details. details.
  • Page 42 Sidewall Venting Options - Direct Vent Installation Low Profile Termination Two Pipe Termination WARNING 4 in min. Refer to documentation included with termination kit for complete installation instructions. Gas Vent Directly Gas Vent Below Keep Free of Directly Obstructions Below Keep Free of Obstructions Figure 40 - Low Profile Sidewall Termination (with Optional IPEX Kit)
  • Page 43 Snorkel Venting (Two Pipe Sidewall Venting Terminations Venting Below Grade Beneath an Overhang) For installations that exit the wall below grade: Excavate the site to a point where the pipes are to exit as shown in Figure 44. Ensure the wall is fully sealed where the pipes penetrate. The exhaust vent / air intake piping MUST be secured to the side of the building above grade, as shown, to provide rigidity.
  • Page 44 Roof Venting Options - Direct Vent Installation Unbalanced Termination (Roof Exhaust / Sidewall Intake) Two Pipe Termination WARNING WARNING Exhaust must terminate a minimum of 18” above the air intake Exhaust must terminate a minimum of 12” above snow level. See termination.
  • Page 45 Roof Venting Options - Direct Vent Installation Unbalanced Venting - Roof Exhaust Termination Two Pipe Termination WARNING Figure illustrates two options for exhaust termination only. Neither vent pipe illustrated is intended for combustion air intake. 4 in min. Figure 50 - Two Pipe Roof Venting Detail Concentric Termination Figure 51 - Unbalanced Venting - Roof Exhaust Termination Options WARNING...

  • Page 46: Venting Through An Existing System

    NOTE: The following instructions refer only to venting through This boiler may be vented through an existing unused vent system. an existing vent system, and not to venting with HTP’s optional The inner diameter of the existing vent system is utilized for the concentric vent kits.

  • Page 47: Power Venting, Indoor Combustion Air In Confined Or Unconfined

    3. Power Venting, Indoor Combustion Air in Confined or Unconfined Space This boiler requires fresh, uncontaminated air for safe operation and must be installed in a mechanical room where there is adequate combustion and ventilating air. NOTE: To prevent combustion air contamination, see Table 7.

  • Page 48: Part 6 - Installing The Condensate Drain

    9. Route the drain line to a nearby floor drain, laundry tub, or condensate pump. If the boiler condensate outlet is lower than the drain, you must use a condensate removal pump (kit p/n 554200 available from HTP). Figure 57 - Condensate Trap Filling...
  • Page 49 NOTES: CONDENSATE PIPING 1. Condensate line must be pitched at least ¼” per foot to properly (SUGGESTED SETUP FOR CONDENSATE REMOVAL drain. If this cannot be done, or a very long length of condensate TO FLOOR DRAIN) hose is used, increase the condensate line to a minimum of 1” ID and place a tee in the line after the condensate neutralizer to properly reduce vacuum lock in the drain line.

  • Page 50: Part 7 - Connecting Electrical Service

    NOTE: For additional electrical protection, the use of a whole house Part 7 - Connecting Electrical Service surge protector is recommended. Damage caused by power surges IS NOT covered by the warranty. WARNING 1. Removing the Power Cord (To Hard Wire the Boiler) To remove the power cord and hard wire the boiler: Install wiring and electrically ground boiler in accordance with the Shut off the power supply at the boiler and at the circuit breaker.

  • Page 51: Connecting Power (120V) For Dhw And Ch Circulators

    2. Connecting Power (120V) for DHW and CH Circulators Cut the cable inside the cabinet and below the plastic connector. Remove the internal part of the cable from the junction box. To connect power for the CH and DHW external pump at the boiler Discard the internal and external parts of the cable.

  • Page 52: Room Thermostat Wiring Connections

    4. Room Thermostat Wiring Connections To connect a room thermostat: Access the low voltage wiring connections by following the directions in Item 3, Low Voltage Wiring Connections. Loosen the cable clamp using a screwdriver and insert the wires leading from the room thermostat. Connect the room thermostat wires to the terminals indicated in Table 19 and Figure 68.

  • Page 53: Internal Wiring Details

    B. Internal Wiring Details POWER-IN DHW PUMP FUSE 5AT FUSE 5A CN16 CN22 CN26 CN12 CN20 CN19 Figure 70 - Electrical Wiring Diagram 420010970304 - LP-700 Rev. 000 Rel. 002 Date 4.21.21...
  • Page 54 Figure 71 - Ladder Diagram 420010970304 - LP-700 Rev. 000 Rel. 002 Date 4.21.21...
  • Page 55 Connector Description HT Selv No. of Location 120 VAC LIVE INPUT POWER SUPPLY 120 VAC NEUTRAL INPUT HT (120V~) AC PROTECTIVE EARTH 120 VAC EXT. PUMP2 INPUT / 120VAC LINE DIV1 EXTERNAL PUMP 2 / Hi-V DIVERTER VALVE 120 VAC NEUTRAL (DHW) 120 VAC EXT.
  • Page 56 Connector Description HT Selv No. of Location +24V ROOM THERMOSTAT SELV (24V) ROOM THERMOSTAT 1 SIGNAL NTC SYSTEM CASCADE NTC SENSOR SIGNAL NTC TANK SELV (5V) BOILER NTC SENSOR SIGNAL CN24 OUTDOOR SENSOR OUTDOOR NTC SENSOR SIGNAL +24V ROOM THERMOSTAT 2 SELV (24V) ROOM THERMOSTAT 2 SIGNAL EBUS2 SIGNAL...

  • Page 57: Part 8 - Gas Connections

    Part 8 - Gas Connections WARNING FIRE AND/OR EXPLOSION HAZARD To avoid serious injury or death, the gas line installation and the gas line inlet pressure test must be done by a licensed professional. Ensure the gas on which the boiler will operate is the same type specified on the rating plate (natural gas or LP gas). This boiler must be converted to propane operation.

  • Page 58: Additional Precaution For Excess Flow Valve (Efv)

    To check inlet gas pressure: 7. Use a manometer to test the gas pressure to make sure it meets 1. Remove yellow cap from line pressure test point. See Figure 74. the minimum standards and does not exceed the maximum 2.

  • Page 59: Part 9 - Controls

    Part 9 - Controls A. Control and Display Overview AUTO COMFORT ON OFF MENU PAR CODE Display Icon Description Digits Indicating: • Boiler Status • Temperature ( F) with bar level Figure 76 - Control and Display Overview • Error Codes (ERROR) •...

  • Page 60: Ignition Procedure

    NOTE: When set to AUTO - Automatic Temperature Control (e.g., B. Ignition Procedure Outdoor Reset), the CH Temperature Setpoint is calculated in accordance with the type of automatic temperature control Press the ON/OFF button on the control panel to power on the selected.

  • Page 61: Automatic Ch Temperature Control (Auto)

    2.2.4 = 1 via the technical menu. NOTICE In order for the boiler to detect changes in room temperature it is necessary to install an HTP Room Sensor. Other thermostats (not HTP) can only switch the boiler ON and OFF. Parameters of Automatic CH Temperature Control -13 °F...

  • Page 62: Type Of Temperature Control

    4 = Indoor and Outdoor Temp. Reset - The boiler target temperature automatically adjusts between the Min and Max Temperature Set- tings (4.2.6 and 4.2.5), based upon the input temperatures provided by an optional HTP Room Sensor AND the included Outdoor Sensor (or Internet Weather via WiFi connection), in accordance with the following formula: Boiler Target Temp = Min Temp (4.2.6) + Slope of Outdoor Reset Curve (4.2.2) X {Room Sensor Influence (4.2.4) X [Room Setpoint - Room Temp] + [Room...

  • Page 63: Parallel Shift Of Reset Curve

    H. Parallel Shift of Reset Curve 179 °F (e.g. Parameter 4.2.3 for Zone 1) When the Reset Curve results in a boiler target +25°F Increase parallel shift temperature that is too high or too low (i.e., heats the building too quickly or slowly), Parallel Shift can be used 0 °F Default to offset the curve up or down to increase or decrease...

  • Page 64: Technical Menu - Access And Navigation

    I. Technical Menu - Access and Navigation To access advanced setup and troubleshooting parameters, it is necessary to enter the Technical Menu. The Technical Menu includes a number of Quick Access Menus which allow easy access to commonly used parameters. See K. Technical Menu - Menu Structure. The Quick Access Menu option, “MENU”, provides access to all parameters.

  • Page 65: Technical Menu - Menu Structure

    K. Technical Menu - Menu Structure Quick Access Menus NETWORK 25 Cascade Manager Parameters User Interface 0 General Boiler Parameters System Settings Direct Access to the Parameters: 0 General 2 Domestic Hot Water 219, 220, 228, 2.29, 231 - 234, 247, 1 Free Parameters System Diagnostics 250, 253, 257 (only when parameter...

  • Page 66: Technical Menu - Complete Menu

    L. Technical Menu - Complete Menu Description Value ACCESS the Complete Menu “+” and “-” 222. Simultaneously press the buttons for 5 seconds. T he display shows 2. Press the “+” button to select 234 , the service code. 3. Press the OK button. PCB.
  • Page 67 Description Value 9 Boiler Heating Capacity (MBH) 0 - 200 Only if the PCB is changed 3 BOILER CH PARAMETERS - 1 Limited by the absolute values defined by parameters 2.3.3 and 1 Adjustable max CH power percentage 0 - 100 2.3.4, i.e., 0 = min power and 100 = max power.
  • Page 68 Description Value ELU WBN = Activated when the boiler is connected to a tank by 8 Antilegionella frequency 24 - 720 (Hours), or 30 days 30 days an NTC sensor. (Parameter 228 = 1) 6 BOILER MANUAL SETTINGS Only to test components 0 Manual mode activation 0 = OFF, 1 = ON 1 Boiler pump control...
  • Page 69 68 - 179 °F Parameter 4.2.0 = 0 Only applicable when using an 3 Zone Freeze Protection Temperature 36 - 59 °F HTP room sensor - Changes all zones 1 SUMMER/WINTER CHANGEOVER 0 S/W function activation 0 = OFF, 1 = ON 1 S/W temperature threshold 50 - 86 °F...
  • Page 70 Adjusts the influence of room temperature on target boiler temperature - a higher setting causes a greater increase to the boiler target temperature as the indoor temperature drops below room setpoint. Only applicable when using an optional HTP Room Sensor and when 4.2.1 = 2 or 4. 68 - 179 °F if Parameter 4.2.0 = 1...
  • Page 71 Adjusts the influence of room temperature on target boiler temperature - a higher setting causes a greater increase to the boiler target temperature as the indoor temperature drops below room setpoint. Only applicable when using an optional HTP Room Sensor and when 5.2.1 = 2 or 4. 68 - 179 °F if parameter 5.2.0 = 1...
  • Page 72 Adjusts the influence of room temperature on target boiler temperature - a higher setting causes a greater increase to the boiler target temperature as the indoor temperature drops below room setpoint. Only applicable when using an optional HTP Room Sensor and when 6.2.1 = 2 or 4. 68 - 179 °F if Parameter 6.2.0 = 1...
  • Page 73 Description Value 3 BOILER CURRENT TEMPERATURES - Read Only 0 CH Supply Setpoint (in °F) 1 CH Supply Temperature (in °F) 2 CH Return Temperature (in °F) 3 DHW Outlet Temperature (in °F) Not applicable to these models 4 Exhaust Flue Temperature (in °F) Only with outdoor sensor 5 Outdoor Temperature (in °F) connected...

  • Page 74: Part 10 - Start-Up Preparation

    B. Check for Gas Leaks Part 10 - Start-Up Preparation WARNING WARNING Before starting the boiler, and during initial operation, smell near Thoroughly clean and flush any system that has used glycol before the floor and around the boiler for gas odorant or any unusual odor. installing the boiler.

  • Page 75: System Water Fill, Purge, And Test

    If the condensate outlet on the boiler is lower than the drain, you Check if the condensate trap contains water. If not, it must be refilled. must use a condensate removal pump, available from HTP (554200). Open the manual air vent on the main exchanger until completely This pump is equipped with two leads that can be connected to filled.

  • Page 76: Part 11 - Start-Up

    The exhaust vent piping for combustion products should be Part 11 - Start-Up suitable and free from any obstructions. 10. Any necessary ventilation inlets in the room should be open WARNING (power vent installation). Verify the condensate trap contains water. If not, it must be FOR YOUR OWN SAFETY READ BEFORE OPERATING filled.

  • Page 77: Combustion Checking Procedure

    B. Combustion Checking Procedure and the icon will appear on the display The order of operations for this procedure must always be respected. when Test Function is active. The boiler will operate at maximum heating power. Operation 1 Gas inlet pressure check Press the button to Loosen screw 1 (Torx 10 - Line Pressure Test...
  • Page 78 If the value measured corresponds to the value given in the Table 29, max adjustment is complete. Otherwise continue the setting procedure. ATTENTION!! The Test Function will automatically deactivate after 30 minutes, or Test Function can be turned off manually by pressing the RESET button.

  • Page 79: Checking Combustion Parameters

    D. Converting the Appliance from Natural Gas to Propane Operation HTP boilers are factory set to operate on Natural Gas. BEFORE OPERATING ON PROPANE the boiler must be converted to Propane using the included conversion kit specific to the boiler model.

  • Page 80: Part 12 - Installation Checklist

    Part 12 - Installation Checklist Before Installing Note Is there enough space to ensure proper installation? Does installation location allow for proper service clearances? Are water and gas lines properly sized and set at proper pressures for the installation? Is boiler location as near the exhaust vent / intake pipe terminations as possible? Have combustible materials been cleared from the installation location? Is there a drain close to the boiler? Water Piping...

  • Page 81: Part 13 - Troubleshooting

    Wiring Note Has the power and control been wired per boiler wiring diagram, this manual? Is the main electrical connection polarity within boiler requirements? Does the power supply voltage agree with the boiler rating plate? 120V AC? Start-Up, Adjust, and Test Note Has the boiler been started? If necessary, has the boiler gas valve been adjusted?

  • Page 82: Boiler Error Codes

    B. Boiler Error Codes Display Description Possible Remedies Error Type CH Circuit Press the Reset button to clear the Error Code. If Error happens again: Blocking 1. Check for the correct functioning and positioning of the supply and return 1 01* Overheat (Manual temperature probes.
  • Page 83 Display Description Possible Remedies Error Type 1. If parameter 223 is set to 0 and a floor safety thermostat is not present, set the Blocking parameter 223 to 1 or connect a floor safety thermostat. 1 16 Floor Thermostat contact open (Auto 2.
  • Page 84 Display Description Possible Remedies Error Type This Error Code will go away when the condition is remedied. If Error happens again disconnect the flame detection electrode. Blocking Then press Reset. 5 02 Flame detected with gas valve closed (Auto If the error does not happen again replace the flame detection Reset) electrode.
  • Page 85 Repeated Lockout Error conditions could indicate a serious error with the boiler or installation. Failure to contact a qualified service technician to troubleshoot the error could result in substantial property damage, serious personal injury, or death. *Error is resettable remotely via HTP Tele-Diagnostic Service, HTP Remote Contractor. 420010970304 - LP-700 Rev. 000 Rel. 002 Date 4.21.21...

  • Page 86: Part 14 - Maintenance

    Part 14 - Maintenance vent or intake pipe openings. If removing the debris does not DANGER allow the boiler to operate correctly, contact your qualified service The boiler must be inspected and serviced annually, preferably at technician to inspect the boiler and the vent system. the start of the heating season, by a qualified service technician.

  • Page 87: Maintenance Only To Be Performed By A Qualified Service Technician

    Check Water and Gas Piping C. Maintenance Only to be Performed by a Qualified Remove the boiler cover and perform a gas leak inspection Service Technician following Operating Instructions, page 2, this manual. If gas Removing the Cabinet Cover and Inspecting the Boiler odor or leak is detected, follow procedures on page 2.
  • Page 88 Unhook the junction box support from the fan and silencer WARNING Water drained from the boiler could be scalding hot. Wait for the boiler to cool before draining water, and take precautions when draining water. Failure to do so could result in property damage, personal injury, or death.
  • Page 89 Remove the gas diaphragm. 13. After all maintenance is complete, reinstall the combustion Remove the electrical connection of the electrode. assembly. Ensure all gaskets are installed and all components Remove the electrical connection to the igniter. are tightened properly. Loosen the four screws and remove the burner unit. 14.
  • Page 90 Verify and replace the other gaskets if they are damaged or DANGER showing signs of deterioration. When servicing is complete, make sure the condensate collector Make sure that the burner is not damaged. Replace if necessary. cap is replaced securely. The condensate trap assembly MUST Reassemble the burner assembly.

  • Page 91: Replacing Components

    Replacing the Fan Remove the silencer and gas line as described in Cleaning the Heat Exchanger Combustion Chamber. Loosen the three [3] screws to release the Mixer (1) from the fan (5). Ensure the O-Ring (4) is not damaged or deteriorating. Figure 108 - Removing the Fan DHW Filter Figure 107 - Removing the DHW Filter...
  • Page 92 Removing the By-Pass Valve Reinstall the fan to the air inlet channel. Ensure the gasket is assembled between the fan and air inlet channel. ELU-120WCN and ELU-150WCN Reconnect the gas line. Replace the sealing ring. The by-pass valve is located in the right hydraulic block. To remove it: Restore the electrical connections of the electrodes.
  • Page 93 Replacing the Main Heat Exchanger Drain the boiler and remove the combustion assembly as described in Cleaning the Heat Exchanger Combustion Chamber. Loosen and remove the CH relief valve. Loosen and remove the CH relief valve pipe and gasket. Remove the securing clips from positions a and b. Figure 116 - Remove the CH Pressure Relief Valve Disconnect the plastic pipes from the manual breather.

  • Page 94: After Maintenance Is Complete

    BE SURE TO USE NEW SEALING RINGS. Part 15 - Maintenance Report Ensure there are no gas leaks. CAUTION DANGER In unusually dirty or dusty conditions, care must be taken to keep Failure to replace the sealing rings will result in exhaust gas leaks, boiler cabinet door in place at all times.
  • Page 95 INSPECTION ACTIVITIES DATE LAST COMPLETED 1 st YEAR 2 nd YEAR 4 th YEAR* PIPING 3 rd YEAR Near boiler piping Check boiler and system piping for any sign of leakage. Leaking pipes could cause property damage. Make sure all piping is properly supported.

  • Page 96: Part 16 - Shutdown

    Part 16 - Shutdown A. Shutdown Procedure If the burner is not operating, disconnect the electrical supply. Supply/Return Temperature Sensors Outdoor Sensor If the burner is operating, lower the set point value to 86 F(for high Tank Sensor temperature system) or 68°F (for low temperature system) and wait DHW Outlet Sensor for the burner to shut off.

  • Page 97: Part 17 - Maintenance Notes

    Maintenance Notes 420010970304 - LP-700 Rev. 000 Rel. 002 Date 4.21.21...
  • Page 98 420010970304 - LP-700 Rev. 000 Rel. 002 Date 4.21.21...
  • Page 99 420010970304 - LP-700 Rev. 000 Rel. 002 Date 4.21.21...

  • Page 100: Customer Installation Record Form

    Customer Installation Record Form The following form should be completed by the qualified installer / service technician for you to keep as a record of the installation in case of a warranty claim. After reading the important notes at the bottom of the page, please also sign this document. Customer’s Name Date of Installation Installation Address...

This manual is also suitable for:

Elu seriesElu-120wbnElu-120wcnElu-150wcn

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