Green Mountain GMHB227 Installation, Operation & Maintenance Manual
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Green Mountain GMHB227 Installation, Operation & Maintenance Manual

Condensing wall mounted gas fired
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Condensing Wall Mounted
Gas Fired
INSTALLATION, OPERATION &
MAINTENANCE MANUAL
Models
GMHB227
GMHB380
Manufactured by:
ECR International Inc.
2201 Dwyer Avenue, Utica, NY 13501
Tel. 800 253 7900
www.ecrinternational.com
PN 240012369 REV. A [08/31/2018]

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Summary of Contents for Green Mountain GMHB227

  • Page 1 Condensing Wall Mounted Gas Fired INSTALLATION, OPERATION & MAINTENANCE MANUAL Models GMHB227 GMHB380 Manufactured by: ECR International Inc. 2201 Dwyer Avenue, Utica, NY 13501 Tel. 800 253 7900 www.ecrinternational.com PN 240012369 REV. A [08/31/2018]...
  • Page 2 VERIFY CONTENTS RECEIVED Safety Relief Valve 30 PSI (227) Fully Assembled Boiler Metal Wall Bracket Temperature Gauge 50 PSI (380) Maximum 50 PSI Used for measuring outside Used for connecting Includes essential documents. temperature condensate piping to boiler Outdoor Sensor Condensate Drain Gas Shutoff Valve Document Package...

  • Page 3: Table Of Contents

    TABLE OF CONTENTS 1 - Important Information ........5 9.7 De-aeration Function........48 9.8 Commissioning ...........48 2 - Introduction ............ 7 9.9 Before Gas Conversion ........50 3 - Component Listing .......... 8 9.10 Gas Conversion (Propane) ......50 4 - Locating Boiler..........10 9.11 Gas Valve Calibration and CO Adjustment..51 9.12 Chimney Sweep Function (CO2 Adjust) ..
  • Page 4 PHYSICAL DATA Dimensions DIMENSIONS GMHB227 GMHB380 Height 30 " [763 mm] 37 7/16" [951 mm] Width 17 3/4" [450 mm] 23 5/8" [600 mm] Depth 22 5/8" [585mm] 25 3/8" [644 mm] Condensate Trap Connection 3/4" NPT 3/4" NPT System Supply 11/4”...
  • Page 5 PHYSICAL DATA GMHB227 GMHB380 Front View 0NLY 0NLY All Models Bottom View Bottom View Dimensions Dimensions 101/2" 83/4" 33/4" 4" 73/4" 5" 113/4" 81/2" 161/4" 91/2" Top View All Models Combustion Vent Connector PN 240012369, REV A [08/31/2018]...

  • Page 6: Important Information

    1 - IMPORTANT INFORMATION FOR YOUR SAFETY READ BEFORE OPERATING 1. Safety Information DANGER Boiler installation shall be completed by qualified agency. See glossary for additional information. WARNING Fire, explosion, asphyxiation and electrical shock hazard. Improper installation could result in death or serious injury.

  • Page 7: Introduction

    (example, swimming pool water). 2.3 Requirements for Commonwealth of • Exceed: Massachusetts: (GMHB227) - 50 psig (3.44 bar) Boiler installation must conform to Commonwealth of (GMHB380) - 80 psig (5.5 bar) Massachusetts code 248 CMR which includes but is not limited Maximum allowable working pressure, or drop below minimum system pressure 7.25 psig (.50 bar)

  • Page 8: Component Listing

    3 - COMPONENT LISTING ITEM GMHB227 Pump System Return Low Water Pressure Cutoff System Supply Gas Valve Condensate Trap NTC Heating sensor (Supply/ Return) QTY 2, (1 Shown for clarity) Water Safety Thermostat Spark Generator Ignition Electrode Flue Sensor Coaxial Connector...
  • Page 9 3 - COMPONENT LISTING ITEM GMHB380 Pump Boiler Drain System Return Low Water Pressure Cutoff Gas Valve System Supply Gas Supply Condensate Trap Air/Gas Blend Manifold Ignition Electrode Flame Detection Electrode Coaxial Connector Flue Sensor De-Aerator Heat Exchanger Heat Exchanger Temperature Sensor Water Safety Thermostat NTC Heating sensor (Supply/...

  • Page 10: Locating Boiler

    Dimension Service (1)(2) Materials follow these instructions could result in death or serious injury. 11-13/16" Model GMHB227 - Top 0" (0 mm) (302 mm) 4.1 Boiler Location Considerations 15-3/4" Model GMHB380 - Top 0" (0 mm) • Ambient room temperature always above 32°F (0°C) to (400 mm) prevent freezing of liquid condensate.
  • Page 11 11-13/16" (300mm) (401mm) Boiler Front View Boiler Front View GMHB380 GMHB227 9-7/8" (250mm) 11-13/16" (302mm) FIGURE 4-2b Service Clearances - Boiler Left side F L O O R FIGURE 4-1b Clearance to Combustible Materials Boiler Left Side View FIGURE 4-2c Service Clearances - Closet Installation...
  • Page 12 4 - LOCATING BOILER FIGURE 4-3 Wall Mount Bracket (Included) CAUTION Boiler weight exceeds 140 pounds (63.5 kg). Do not lift boiler onto wall without assistance. Center brackets. Avoid overhang on sides of Note wall mount bracket. Lift boiler using chassis. Using front jacket, vent piping, water or gas fittings to lift boiler may cause damage to the boiler.

  • Page 13: Hydronic Piping

    5 - HYDRONIC PIPING • Thoroughly clean and flush system before connecting to GMHB227 - Boiler rated at 50 psig (3.5 Bar) Note boiler. maximum allowable working pressure. • If oil is present in system water, use approved detergent to wash system.

  • Page 14: Safety Relief Valve And Air Vent

    5 - HYDRONIC PIPING FIGURE 5-2 Safety Relief Valve Discharge Piping WARNING Burn and scald hazard. Safety relief valve could discharge steam or hot water during operation. Install discharge piping per these instructions. 5.3 Safety Relief Valve • Install safety relief valve using pipe fitting provided with boiler.

  • Page 15: Trim Piping

    5 - HYDRONIC PIPING 5.5 Trim Piping • Temperature - Pressure Gauge. Install temperature WARNING pressure gauge using piping provided with boiler. See Burn and scald hazard. Safety relief valve could figure 5-2. Boiler has integral drain valve located inside discharge steam or hot water during operation.
  • Page 16 5 - HYDRONIC PIPING Piping Legend Illustrations are meant to show system piping Note concept only. Installer responsible for all equipment and detailing required by authority having jurisdiction. Boiler PN 240012369, REV A [08/31/2018]...
  • Page 17 5 - HYDRONIC PIPING FIGURE 5-4 - Primary/Secondary, Zoned, WITH ZONE VALVES, (Optional) Indirect Tank * Hot Water Supply Tempered Tank Sensor Optional Indirect BOILER DHW Tank Cold T & P Relief Water Valve to Supply Drain DHW Pump ASME Relief CH /System Valve...
  • Page 18 5 - HYDRONIC PIPING FIGURE 5-5 - Multiple Boilers with Individual Primary Secondary, Zone Valves and (Optional) Indirect CH/System Pump 1 - SEE NOTE # BOILERS ON PIPE PIPE BRANCH SIZE System Temperature 2-1/2 Sensor BOILER BOILER BOILER CH/System Pump 1 must # Boilers on Pipe match total capacity of all...

  • Page 19: Combustion Air And Vent Piping

    6 - COMBUSTION AIR AND VENT PIPING • Venting shall be supported adjacent to each joint using WARNING steel strapping or equivalent. See Figure 6-1. Fire, explosion, and asphyxiation hazard. Improper • Support horizontal sections of vent pipe to prevent sags capable of accumulating condensate.

  • Page 20: Definitions

    6 - COMBUSTION AIR AND VENT PIPING 6.4 Securing Twin Pipe Polypropylene Venting Figure 6-1 - Venting Support Venting manufacturer's use a device to secure Note single wall twin pipe polypropylene vent pieces to each other. Proper application of the securing mechanism is necessary for any use of twin pipe polypropylene venting on exhaust or air intake.

  • Page 21: Approved Venting Materials

    *Centrotherm * Z-Flex ® Note: Maximum equivalent length may vary between manufacturers. Vent Material Options GMHB227 GMHB380 4" / 6" [110 mm / 1600 mm] polypropylene 5"/3" [125mm/80m] polypropylene coaxial. coaxial. 3" [80mm] polypropylene twin pipe. 4" [110mm] polypropylene twin pipe.

  • Page 22: Coaxial Venting

    6 - COMBUSTION AIR AND VENT PIPING FIGURE 6-4 Side Wall Concentric Venting WARNING • Covering non-metallic vent pipe and fittings with thermal insulation shall be prohibited. • Use of cellular core PVC for venting flue gas could 18" Vertical Clearance to result in death, or serious injury.

  • Page 23: Indoor Air For Combustion (380 Only)

    6 - COMBUSTION AIR AND VENT PIPING 6.8A Indoor Air For Combustion (380 ONLY) 02. One Permanent Opening Method. Provide opening commencing within 12 inches Provisions for combustion and ventilation air to be in of top of enclosure. Provide minimum accordance with the section “Air for Combustion and clearance of 1 inch on sides/back and Ventilation,”...

  • Page 24: Twin Pipe Polypropylene And Cpvc System

    Fresh air is drawn in at a different area from the flue terminal location. A. Twin Pipe CPVC System (GMHB227 ONLY) CPVC is approved for boiler exhaust. CPVC or PVC are both approved for air intake.
  • Page 25 6 - COMBUSTION AIR AND VENT PIPING E. Securing Twin Pipe Polypropylene Venting Figure 6-8 - Venting Support Venting manufacturer's use a device to secure Note single wall twin pipe polypropylene vent pieces to each other. Proper application of the securing mechanism is necessary for any use of twin pipe polypropylene venting on exhaust or air intake.

  • Page 26: Venting Configurations

    6 - COMBUSTION AIR AND VENT PIPING 6.10 Venting Configurations Use of vent covers may cause freezing. If using Note Various venting configurations can be applied to this boiler. vent covers overall vent length must be considered. For guidance see Venting Configuration Table 5A and Failure to heed this information may compromise corresponding figures.
  • Page 27 6 - COMBUSTION AIR AND VENT PIPING FIGURE 6-9 Two Pipe Roof Vent  12" (205mm) Min. horizontal separation between combustion air intake and vent 12" (205mm) Min. of same appliance.  12" (205mm) Min. 84" (2134mm) Max. 12" (305mm) Min. 15"...
  • Page 28 6 - COMBUSTION AIR AND VENT PIPING FIGURE 6-12 Side Wall Venting Terminal w/T-Terminal Configurations of single pipe vent with flue on the Note sidewall, requires a tee as the vent terminal. See Figures 6-12, 6-14 and 6-21 12" (305mm) Min. Separation of Combustion Air and Vent shall be maintained.
  • Page 29 6 - COMBUSTION AIR AND VENT PIPING FIGURE 6-15 Flue on Roof, Indoor Combustion Air (380 ONLY) Maintain 12"(305mm) US (18"(457mm) Canada) Vent minimum clearance above highest anticipated Combustion air and Vent Piping Length Page snow level maximum 24" (610mm) above roof 24"...

  • Page 30: Side Venting Terminal Requirements

    6 - COMBUSTION AIR AND VENT PIPING 6.11 Side Venting Terminal Requirements of : • USA - National Fuel Gas Code, ANSI Z223.1/NFPA 54. Venting terminal from doors and windows See figure 6-17 Venting terminal from forced air inlet of other appliances See figure 6-18 Venting terminal from snow level See figure 6-19...
  • Page 31 6 - COMBUSTION AIR AND VENT PIPING FIGURE 6-20 Keep vent termination 3’ minimum Vegetation, (914mm) away from vegetation. Position Plants & termination where vent vapors will not Shrubs damage plants/shrubs or air conditioning equipment. Termination Vent termination US only - 4’ (1.2m), Meters, Canada - 6' (1.9m) horizontally from, no Regulators,...
  • Page 32 6 - COMBUSTION AIR AND VENT PIPING FIGURE 6-22 Flue Termination Location Vent Termination Minimum Clearances CANADA Clearance above grade, veranda, porch, deck, or balcony 12" (305mm) 12" (305mm) Clearance to window or door that may be opened 12" (305mm) 3 ft.

  • Page 33: Multiple Boiler Venting - General

    6 - COMBUSTION AIR AND VENT PIPING FIGURE 6-23 Correctly Mounted Piping WARNING Asphyxiation hazard. DO NOT use screws to secure piping together. Failure to follow these instructions USE OF CHECK VALVE IS could cause death or serious injury. MANDATORY WARNING Cascade venting of condensing boilers shall be vented with Duravent...
  • Page 34 6 - COMBUSTION AIR AND VENT PIPING FIGURE 6-26 Secure Clamp around Flue Adapter each boiler in cascade system Connect flue damper to 90° elbow for each boiler in cascade system. Connect boiler flue adapter to flue damper for each boiler in cascade system.

  • Page 35: Multiple Boiler Venting - Layout

    6 - COMBUSTION AIR AND VENT PIPING 6.14 Multiple Boiler Venting - Venting Layout Available pressure at flue outlet is 0.40" w.c. (100pa) Maximum Vertical Length Number of Appliances 6 in *6 in / 8 in 8 in (150 mm) (150 / 200 mm) (200 mm) 98.4 ft...
  • Page 36 6 - COMBUSTION AIR AND VENT PIPING A. Single Line System System consisting of boilers arranged in line each connected to common exhaust manifold. FIGURE 6-29 2 in. per 3 ft. 4 in. (50.0 mm per 1.0 m) 3° B. Back to Back System This system consists of boilers installed back to back connected to a common exhaust manifold.

  • Page 37: Multiple Boiler Venting - Parameter Setting

    6 - COMBUSTION AIR AND VENT PIPING C. Double Line System This system consists of boilers installed on two lines, connected to a common exhaust manifold. FIGURE 6-31 2 in. per 3 ft. 4 in. (50.0 mm per 1.0 m) 3°...

  • Page 38: Condensate Piping

    6 - COMBUSTION AIR AND VENT PIPING FIGURE 6-32 Condensate Drain 6.16 Condensate Piping • Use materials acceptable to authority having jurisdiction. In absence of such authority: USA - PVC or CPVC per ASTM D1785/D2845 Cement or primer per ASME D2564 or F493. •...

  • Page 39: Gas Supply Piping

    • USA - National Fuel Gas Code, ANSI Z223.1/NFPA 54 • Size and install gas piping system to provide sufficient gas supply to meet maximum input at not less than minimum supply pressure. GMHB227 GMHB380 Required Gas Rate Gas Connection...

  • Page 40: Leak Check

    7 - GAS SUPPLY PIPING FIGURE 7-3 Manual Main Gas Shutoff Valve Outside DANGER Boiler Jacket Fire Hazard. Do not use matches, candles, open flames, or other methods providing ignition source. Failure to comply will result in death or serious injury.

  • Page 41: Electrical Connections

    8 - ELECTRICAL CONNECTIONS 8.2 Electrical Connections DANGER • Boiler requires 120V 60Hz power supply. Verify Electrocution Hazard! HIGH VOLTAGE - Connections electrical supply is polarized. in terminal block M1 are high voltage (120V / 60Hz). • Boiler shall be grounded and on dedicated circuit. Before making connections, verify appliance is •...

  • Page 42: Access To Connection Block

    Terminals 4 - 5: outdoor temperature sensor connection (supplied as accessory) Terminal 3 : not used. Terminals 6 - 7 - 8: see section 8.6. Terminals 9 - 10: Indirect storage tank sensor connection for GMHB227 and GMHB380 models. PN 240012369, REV A [08/31/2018]...

  • Page 43: Install Room Thermostat

    8 - ELECTRICAL CONNECTIONS 8.5 Install Room Thermostat FIGURE 8-4 Thermostat Connections Install room thermostat on inside wall. Do not install where it will be influenced by drafts, hot or cold water pipes, lighting fixtures, television, sun rays or near a fireplace. Dry contact only - do not apply 24 volts between 6 and 7.

  • Page 44: Optional Electrical Connections

    8 - ELECTRICAL CONNECTIONS 8.6 Optional Electrical Connections FIGURE 8-5 1K Ω Outdoor Sensor Connections A. 1 K Ohm (1K Ω) Outdoor Temperature Sensor 1 K Ω To connect this accessory, see figure 8-5, terminals 4-5, and instructions supplied with sensor. B.

  • Page 45: Start Up Procedure

    9 - START UP PROCEDURE 9.1 Central Heating System Connections GMHB227 HEATING ONLY GMHB380 HEATING ONLY WITH OPTIONAL INDIRECT DHW CONNECTION LEGEND GMHB227 GMHB380 Pressure Relief Valve 30.00 psig 50 psig Heating return connection 1" NPT 1 1/4" NPT Heating supply connection 1"...

  • Page 46: System Startup

    9 - START UP PROCEDURE 9.2 System Start Up FIGURE 9-1 Condensate Drain Assembly Follow all codes and regulations when filling the boiler. Model 227 shown (380 at top of boiler) Use drain taps to allow system to completely drain. Thoroughly flush the heating system before boiler is connected and again after first heating.

  • Page 47: Commission Setup (Electric)

    9 - START UP PROCEDURE 9.5 Control Panel 9.4 Commission Setup (Electric) Control display will light immediately when power is applied. Check electrical connections to thermostat and other external controls. Check any other connections to boiler. Press and hold for 6 seconds, to display information as Check electrical connections, particularly the ground shown in the table below.

  • Page 48: Commissioning Setup (Overview)

    9 - START UP PROCEDURE Close aeration valve. WARNING If venting function is interrupted by power blackout, start Fire, explosion, and asphyxiation hazard! Boiler is set function again when power is restored. Press for natural gas from the factory. If propane is to be used together and hold at same time for at least 6 seconds.
  • Page 49 9 - START UP PROCEDURE FIGURE 9-2 - Commissioning Function Flow Chart To complete the function check: Gas Supply Pressure • Power supply (120V; 60Hz + T-fuse) Natural Gas • Gas Pressure - (See Sections 7-1 and 7-2) 10.5 13.5 Power Supply Short Display...

  • Page 50: Before Gas Conversion

    The temperature of combustion air must be measured on the air intake test port (B) by inserting the measurement sensor approximately 3-3/16" (80.00 mm) (C). For GMHB227 port (B) is blocked off if using a 2 pipe vent conversion kit. PN 240012369, REV A [08/31/2018]...

  • Page 51: Gas Valve Calibration And Co

    9 - START UP PROCEDURE FIGURE 9-6 Aerator (GMHB227 shown) 9.11 Gas Valve Calibration and CO Adjustment: Chimney Sweep Function = Manual CO adjustment. CO values shall be checked and adjusted if outside the required range. Enable Chimney Function/CSF (Service): •...

  • Page 52: Check Firing Rate

    100% Fire (MBH) 15 seconds. Size • Use a regularly calibrated combustion analyzer for combustion analysis. GMHB227 GMHB380 WARNING Fire, explosion, and asphyxiation hazard! Boiler is set for natural gas from the factory. If propane is to be used the gas valve must be adjusted before turning boiler on.

  • Page 53: Parameters Settings

    9 - START UP PROCEDURE 9.14 Parameter Setting Menu To set PCB parameters proceed as follows: Press together for about 6 seconds, the display shows "PO1" alternating with its valve (01); The parameter setting menu is divided in pages, each with 10 parameters (i.e.

  • Page 54: Operating Instructions

    10 - OPERATING INSTRUCTIONS FOR YOUR SAFETY READ BEFORE OPERATING CAUTION WARNING WHAT TO DO IF YOU SMELL GAS • Do not try to light any appliance. If you do not follow these instructions exactly, a fire or explosion may result causing property •...

  • Page 55: Boiler Controls

    10 - OPERATING INSTRUCTIONS 10.3 Boiler Controls For correct boiler ignition, proceed as follows: • Check system pressure is correct; • Power boiler; • Open manual gas shut off valve (positioned under boiler); • Select required heating mode. Push to select operating mode.

  • Page 56: Boiler Operating Mode

    10 - OPERATING INSTRUCTIONS 10.3.1 Boiler Operating Mode 10.3.3 Control Function Knobs Left and Right Knobs: main use is to adjust respectively the To change the boiler MODE press To change the boiler MODE press with a very short push. with a very short push.

  • Page 57: Test For Gas Leaks And Purge

    10 - OPERATING INSTRUCTIONS Special functions Buttons/Knobs INFO menu long push   Next page short push Previous page short push Scroll within a page* Address/Page Knob (Left Knob DHW) Escape long push Parameter setting menu long push   Next page short push Previous page...

  • Page 58: Parameter Setting Menu

    10 - OPERATING INSTRUCTIONS 10.3.5 Parameter Setting Menu 10.3.6 Description Of Parameters To set PCB parameters proceed as follows: P70 Ignition fan speed setting: Fan Speed = P70 * 100 rpm P71 Maximum fan speed: Fan speed = 3500 + P71 * 25 rpm P72 Minimum fan speed: Fan speed = 750 + P72 * 10rpm Example To set ignition speed at 3000 rpm...
  • Page 59 10 - OPERATING INSTRUCTIONS 10.3.6 Description of Parameters GMHB GMHB GMHB GMHB Parameter Parameter Description DHW Modulation gas type selection Boiler setting 00= instantaneous combi boiler 02= instantaneous combi boiler with DHW micro tank 03= instantaneous combi boiler with pre heat 04= only heating boiler with DHW thermostat (system boiler 1) 05= only heating boiler for external DHW tank 06= boiler with DHW storage tank...
  • Page 60 10 - OPERATING INSTRUCTIONS 10.3.6 Description of Parameters- Continued GMHB GMHB GMHB GMHB Parameter Parameter Description Max DHW power setting Min CH power setting Maximum Central Heating setpoint (°C) 00= 176° F (80°C) 01= 113°F (45°C) Pump overrun time in heating mode (min) Maximum overrun time before a new relight of burner in heating mode (min) Manufacturer information.
  • Page 61 10 - OPERATING INSTRUCTIONS 10.3.6 Description of Parameters- Continued GMHB GMHB GMHB GMHB Parameter Parameter Description Manufacturer information. Set to 90. Ignore other options. Manufacturer information. Set to 0. Ignore other options. Manufacturer information. Set to 20. Ignore other options. Manufacturer information.

  • Page 62: Command Functions (Service)

    10 - OPERATING INSTRUCTIONS 10.4 Boiler Operation 10.3.7 Command Functions (Service) Domestic hot water supply always takes priority over central heating. Demand for hot water required during central heating period, boiler automatically switches to hot water mode until demand is satisfied i.e. storage water is to required temperature. This interruption in central heating is only when demand for hot water is present and should not be noticed by the User.

  • Page 63: General Maintenance And Cleaning

    11 - GENERAL MAINTENANCE AND CLEANING • Check following components are operating properly and are DANGER free of blockages or obstructions: Before servicing, turn off electrical power to boiler at • air vent; service switch. Close manual gas valve to turn gas •...

  • Page 64: Maintenance And Routine Servicing

    11 - GENERAL MAINTENANCE AND CLEANING WARNING NOTICE Following service procedures must be performed by Perform regular service and maintenance by qualified qualified service agent. Boiler owner shall not attempt service agency at least once every 12 months to assure these steps.

  • Page 65: Draining The Boiler

    • Gas valve • Thoroughly flush water pipe work. Clean filters in heating • Gas nozzle return and supply water isolating valves. • Burner • Repressurize the system. • Flame sensing electrode 11-1 Electrodes - (GMHB227 shown) PN 240012369, REV A [08/31/2018]...

  • Page 66: User Information

    11 - GENERAL MAINTENANCE AND CLEANING 11.9 User Information NOTICE Advise and demonstrate to User the following important When servicing the appliance, check the condition and information: position of flame sensing electrode and replace it if A. Turn Boiler on and off. How to operate system controls.

  • Page 67: Ratings And Capacities

    (1)(3) Number (MBH) Efficiency (1)(2) Maximum Minimum GMHB227 95.0 GMHB380 95.0 1000 Btu/hr (British Thermal Units Per Hour) Heating Capacity, Thermal Efficiency, and AFUE (Annual Fuel Utilization Efficiency) are based on DOE (Department of Energy) test procedures. Net AHRI Ratings based on piping and pickup allowance of 1.15. Contact Technical Support before selecting boiler for installations having unusual piping and pickup requirements, such as intermittent system operation, extensive piping systems, etc.

  • Page 68: Trouble Shooting

    13 - TROUBLE SHOOTING 13.1 Initial Fault Finding Checks 128 is displayed if there has been a flame failure during Check gas, water and electrical supplies are available at normal burner operation. the boiler. Electrical supply = 120V ~ 60 Hz. 133 , 134 and 135 indicate the gas supply has been...

  • Page 69: Diagnostic Errors

    13 - TROUBLE SHOOTING 13.2 Error Diagnostics The phase status is a special operating mode before the error. The Green Mountain PCB allows the display to list errors accrued in the boiler. Stand-by PCB has a counter which increases itself only if the anomaly is Pre-purging function active consecutive repetition.

  • Page 70: Error Table For Installer

    13 - TROUBLE SHOOTING Table 13.3 Error Table for Installer Use this table for error reporting: NUMBER OF DAYS CH FLOW CONSECUTIVE ERROR ERROR ELAPSED SYSTEM PHASE TEMPERATURE COUNTER FOR NUMBER CODE FROM STATUS STATUS VALUE DURING SAME ERROR ERROR ERROR EVENT EVENT NO RESET...

  • Page 71: Error Codes

    13 - TROUBLE SHOOTING Table 13.4 Error Codes ERROR INTERNAL ERROR ACTION CODE CODE Gas valve connection fault Check the cable PCB/gas valve and gas valve plug External probe fault Check the sensor External RF probe fault Check the sensor Differential water flow switch fault (still Check the water flow switch open)
  • Page 72 13 - TROUBLE SHOOTING ERROR INTERNAL ERROR ACTION CODE CODE Boiler max temperature exceeded for over E110/ temperature (probable pump jammed or air Check the correct circulation of the water and the pump in the circuit) E110 Safety thermostat sensor tripped Check the sensor Water pressure HIGH (>43 psig) (>...

  • Page 73: Errors In Fault History

    13 - TROUBLE SHOOTING 13.5 Errors In Fault History Only ERROR INTERNAL ERROR ACTION CODE CODE Anti wind activation with increase of the Check the position of the terminal of the flue duct. minimum fan speed No other action to do E63/E65 Combustion level out of range Check flue recirculation and the combustion levels.

  • Page 74: Optional Equipment

    13 - TROUBLE SHOOTING 13.6 Optional Equipment IMPORTANT: Sensors supplied with this boiler are proprietary to the manufacturer. Use of alternate market sensors WILL diminish boiler performanc CHART 1 - 1 k Ohm CHART 2 - 10 K Ohm OUTDOOR AIR SENSOR DATA INDIRECT TANK SENSOR DATA [°F] [Ohm]...
  • Page 75 13 - TROUBLE SHOOTING Figure 13-1 Temperature-Resistance Chart for Supply and Return Temperature Sensors T (°C) T (°F) R (Ohm) 309396 171840 98932 58879 36129 22804 14773 12000 9804 6652 4607 3252 2337 1707 1266 PN 240012369, REV A [08/31/2018]...

  • Page 76: Glossary

    14 - GLOSSARY • APPLIANCE - Device to convert gas into energy; term • DRAFT - Pressure difference causes gases or air to flow includes any component, control, wiring, piping or tubing through a chimney, vent, flue or appliance. required to be part of the device. •...
  • Page 77 14 - GLOSSARY • PURGE - To free gas conduit of air or gas, or mixture of gas and air. • PURGE TIME - Period of time intended to allow for dissipation of any unburned gas or residual products of combustion.

  • Page 78: Appendix A - Wiring Diagrams

    APPENDIX A - WIRING DIAGRAMS A-1 MODEL GMHB227 PN 240012369, REV A [08/31/2018]...
  • Page 79 APPENDIX A - WIRING DIAGRAMS A-1 MODEL GMHB227 - LADDER DIAGRAM LADDER DIAGRAM 160/227/230 CENTRAL HEAT BOILER FUSE 15A FUSE 15A BOILER CONTROL SAFETY THERMOSTAT X37-1 X10-1 SAFETY X10-2 X37-2 THERMOSTAT X10-3 X37-3 JUMPER X37-4 IGNITION ELECTRODE X12-1 SPARK X22-1...
  • Page 80 APPENDIX A - WIRING DIAGRAMS A-2 MODEL GMHB380 PN 240012369, REV A [08/31/2018]...
  • Page 81 APPENDIX A - WIRING DIAGRAMS A-3 MODELS - GMHB380 LADDER LADDER DIAGRAM 380 CENTRAL HEAT BOILER FUSE 15A FUSE 15A BOILER CONTROL SAFETY THERMOSTAT X37-1 X10-1 SAFETY X37-2 X10-2 THERMOSTAT X10-3 X37-3 JUMPER IGNITION X37-4 ELECTRODE X12-1 SPARK X12-2 GENERATOR X22-1 FLOW SENSOR...
  • Page 82 NOTES PN 240012369, REV A [08/31/2018]...
  • Page 83 NOTES PN 240012369, REV A [08/31/2018]...
  • Page 84 IMPORTANT In accordance with Section 325 (f) (3) of the Energy Policy and Conservation Act, this boiler is equipped with a feature that saves energy by reducing the boiler water temperature as the heating load decreases. This feature is equipped with an override which is provided primarily to permit the use of an external energy management system that serves the same function.

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