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Green Mountain GMHB125 Installation, Operation & Maintenance Manual

Condensing wall mounted gas fired
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Models
GMHB125
GMHB160
GMCB150
GMCB200
Condensing Wall Mounted
Gas Fired
INSTALLATION, OPERATION &
MAINTENANCE MANUAL
Manufactured by:
ECR International Inc.
2201 Dwyer Avenue, Utica, NY 13501
Tel. 800 253 7900
www.ecrinternational.com
PN 240012363 REV. B [03/29/2019]

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  • Page 1 Condensing Wall Mounted Gas Fired INSTALLATION, OPERATION & MAINTENANCE MANUAL Models GMHB125 GMHB160 GMCB150 GMCB200 Manufactured by: ECR International Inc. 2201 Dwyer Avenue, Utica, NY 13501 Tel. 800 253 7900 www.ecrinternational.com PN 240012363 REV. B [03/29/2019]...
  • Page 2 Concentric to Two Pipe Metal Wall Bracket Temperature Pressure Adapter Fully Assembled Boiler w/ 4 ea Wall Screws Gauge GMHB125/GMCB150 and Plugs Shown Includes Essential Documents and Warranty 4 ea - 17x24x2 Gaskets 11x17 Wire Diagrams 5 GPM Flow Restrictor...

  • Page 3: Table Of Contents

    TABLE OF CONTENTS 1 - Important Safety Information ......6 9 - Start Up Procedure ......... 57 9.1 Central Heating System Connections - Heat Only..57 2 - Introduction ............ 7 9.2 Central Heating System Connections - Combi ..57 2.1 Installation Requirements ........7 9.3 Gas Conversion ..........58 2.2 ANSI/ASME CSD-1.
  • Page 4 23" [584 mm] 3/4" NPT 3/4" NPT Condensate Trap Connection 1" NPT 1" NPT System Supply 3/4” NPT 3/4” NPT DHW Outlet (GMHB125 Optional) 3/4” NPT 3/4” NPT Gas Connection 3/4” NPT 3/4” NPT DHW (Cold Water) Inlet 1" NPT 1” NPT...
  • Page 5 PHYSICAL DATA 125 HEAT Front View 160 HEAT ONLY All Models 0NLY Bottom View Bottom View Dimensions Dimensions 7" 5" 101/2" 31/2" 31/2" Wall 4" 6" 6" Wall 5" 125/150 9" Top View 81/2" *Combustion 91/2" Vent Connector Wall 200 COMBI 150 COMBI Bottom View Bottom View...

  • Page 6: Important Safety Information

    1 - IMPORTANT SAFETY INFORMATION 1. Safety Information DANGER Fire, explosion, asphyxiation hazard. This boiler is set Boiler installation shall be completed by qualified agency. See operate with Natural Gas. A conversion kit is included glossary for additional information. with this boiler for use with Propane. Do not operate this boiler before identifying the type of fuel to be WARNING used and conversion to propane if necessary.

  • Page 7: Introduction

    • GMCB150 and GMCB200 provide both central heating and domestic hot water. 2.1 Installation shall conform to requirements of authority having jurisdiction or in absence of such • GMHB125 and GMHB160 central heating only. requirements: • Indoor installation. UNITED STATES •...

  • Page 8: Component Listing

    3 - COMPONENT LISTING GMHB125 Heat Only ITEM GMHB125 Pump with Air Separator Boiler Drain Tap System Return DHW Indirect Tank Return DHW Indirect Tank Supply Gas Valve DHW Indirect Tank Supply Low Water Pressure Cutoff System Supply Condensate Trap...
  • Page 9 3 - COMPONENT LISTING GMHB160 Heat Only ITEM GMHB160 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 Aerator Coaxial Connector...
  • Page 10 3 - COMPONENT LISTING GMCB150 Combi ITEM GMCB150 Pump with Air Separator Boiler Drain Tap System Return DHW Indirect Tank supply Flow Sensor with Water Filter and Flow Restrictor Gas Valve DHW (Hot Water) Outlet NTC DHW Sensor Low Water Pressure Cutoff System Supply Condensate Trap 3-Way Valve with Motor...
  • Page 11 3 - COMPONENT LISTING GMCB200 Combi ITEM GMCB200 Pump with Air Separator System Return DHW (Cold Water ) Inlet Flow Sensor with Water Filter and Flow Restrictor Gas Valve DHW (Hot Water) Outlet NTC DHW Sensor Low Water Pressure Cutoff System Supply Condensate Trap 3-Way Valve with Motor...

  • Page 12: Locating Boiler

    4 - LOCATING BOILER WARNING TABLE 1: BOILER CLEARANCES Fire Hazard! Do not install on carpeting. Failure to Manufacturer Combustible follow these instructions could result in death or Dimension Recommended Materials serious injury. for Service (1)(2) Top (A) 0" (0 cm) 8-5/8"...

  • Page 13: Service And Combustible Clearances

    4 - LOCATING BOILER 4.2 Service and Combustible Clearances SERVICE CLEARANCES 125 & 150 160 & 200 13-9/16 in 21-1/2 in Front View of Boiler [571.5 mm] [345 mm] Left Side View of Boiler 13.58 in / 345.00 mm 30 in [763 mm] CLEARANCES FOR COMBUSTIBLE MATERIALS CLEARANCES REQUIRED FOR...

  • Page 14: Wall Mounting

    6. This will give position of center of hole for flue. Required hole size for coaxial flue: • GMHB125 & GMCB150 - 4 3/8" [110 mm] diameter • GMBH160 & GMCB200 - 5 5/16" [135 mm] diameter PN 240012363 REV. B [03/29/2019]...

  • Page 15: Hydronic Piping

    5 - HYDRONIC PIPING WARNING Boiler rated at 50 psig (345 kPa) maximum Note allowable working pressure. Boiler provided with Boiler and its individual shutoff valve shall be disconnected from gas supply piping system during 30 psig (206 kPa) safety relief valve. any pressure testing of that system at test pressures in excess of 1/2 psi (3.40 kPa - 34.47 mbar).

  • Page 16: Special Conditions

    5 - HYDRONIC PIPING 5.2 Special Conditions • When purging installations that include standing iron radiators and systems with manual vents at high points, start with nearest manual air vent. Open the Do not expose boiler and condensate piping to vent until water flows out, then close vent.

  • Page 17: 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 and Air Vent •...

  • Page 18: Trim Piping

    5 - HYDRONIC PIPING 5.4 Trim Piping • Manufacturer recommends installing an isolation and purge valve to use during commissioning to ensure the boiler • Temperature - Pressure Gauge. Install temperature does not shut down due to over temperature. See Figure pressure gauge.
  • Page 19 5 - HYDRONIC PIPING FIGURE 5-3 - PIPING DIAGRAM - LWCO LOCATION Arrange piping to prevent Low Water Cutoff (LWCO) Note Installation if required by the water dripping onto boiler. Authority Having Jurisdiction Illustrations are meant to (See Figure 5-5 for detail) Note show system piping concept Position LWCO Above...
  • Page 20 5 - HYDRONIC PIPING FIGURE 5-4 - LWCO WIRING DIAGRAM Low Water Cutoff (LWCO) Electrical Conduit J-Box 120 V/60 HZ Conduit or Power (Polarized) 120 V/60 HZ Supply cord Cord Set From Boiler (Polarized) 120 V/60 HZ Socket FIGURE 5-5 - LOW WATER CUTOFF - DETAIL PN 240012363 REV.
  • Page 21 5 - HYDRONIC PIPING FIGURE 5-6 MULTI ZONE SYSTEM WITH ZONE VALVES Zone Valves ASME Relief Valve CH System Pump Cold Water Supply Note 12” (305MM) MAXIMUM SEPARATION Note BOILER DOES NOT INCLUDE EXTERNAL PUMP RELAY PN 240012363 REV. B [03/29/2019]...
  • Page 22 5 - HYDRONIC PIPING 125 with Zone Circulator Pumps USE ONLY IF TANK IS WITHIN 5FT OF BOILER FROM SYSTEM SYSTEM 5 FT MAX. MAGNETIC DIRT SEPARATOR PN 240012363 REV. B [03/29/2019]...
  • Page 23 5 - HYDRONIC PIPING 160 with Zone Circulator Pumps FROM SYSTEM SYSTEM MAGNETIC DIRT SEPARATOR PN 240012363 REV. B [03/29/2019]...

  • Page 24: Central Heating System

    5 - HYDRONIC PIPING 5.7 Central Heating System 5.10 Domestic Hot Water Mode GMCB150 & GMCB200 or GMHB125 with Indirect Tank Boiler is designed for use in a sealed central heating system. WARNING Design the system to operate with flow temperatures of up to 176°F (80°...
  • Page 25 5 - HYDRONIC PIPING DANGER Water 1st Degree Burn 2nd and 3rd Degree Temperature Exposure Time For Burn Exposure Time Setting An Adult For An Adult 120° F 1 minute 5 minutes 130° F 5 seconds 30 seconds 140° F 2 seconds 5 seconds 150°...

  • Page 26: Manufacturer Recommendation - Filter

    5 - HYDRONIC PIPING 5.11 Manufacturer Recommendation - Filter (Combi Models - DHW Piping) FIELD SOURCE PRESSURE RELIEF VALVE AS REQUIRED BY AUTHORITY HAVING JURISDICTION Potable water Potable water Filter Thermostatic Mixing Valve Manufacturer Recommendation A water sediment filter for potable water before entering the boiler is highly recommended to prevent errors and lockouts.

  • Page 27: Combustion Air And Vent Piping

    6 - COMBUSTION AIR AND VENT PIPING • Slope exhaust pipe minimum of 1/4” per foot, or vent WARNING manufacturer’s recommendation, whichever is greater; Fire, explosion, and asphyxiation hazard. Improper back toward the boiler. installation could result in death or serious •...

  • Page 28: Fill Condensate Trap With Water

    6 - COMBUSTION AIR AND VENT PIPING 6.4 Definitions 6.3 Fill Condensate Trap with Water Coaxial piping – exhaust and air intake pipe have a WARNING common axis. Asphyxiation hazard! Fill condensate trap before installing venting to avoid combustion products escaping boiler.

  • Page 29: Vent Termination

    6 - COMBUSTION AIR AND VENT PIPING 6.5 Vent Termination 6.6 Approved Venting Materials • Terminate combustion air and vent pipes with fittings or WARNING coaxial vent kit. Manufacturer recommends this condensing boiler be Use horizontal pipe for vent and 90° elbow for vented with approved polypropylene venting material.

  • Page 30: Approved Polypropylene Manufacturers

    (Polyphenolsulfone) in venting systems shall be prohibited. * Natalini - Evaluated and approved for use with this boiler. Vent Material Options GMHB125 & GMCB150 GMHB160 & GMCB200 4" / 2" [100 mm / 50 mm] polypropylene coaxial. 5"/3" [125 mm/80 mm] polypropylene coaxial.

  • Page 31: Coaxial Venting Instructions

    6 - COMBUSTION AIR AND VENT PIPING 6.8 Coaxial Venting Instructions WARNING Maximum equivalent flue lengths for Coaxial venting are: Asphyxiation hazard. Before securing the screws ensure the pipe has been pushed in a minimum of Coaxial Pipe Vent Lengths 1-3/4"...
  • Page 32 6 - COMBUSTION AIR AND VENT PIPING FIGURE 6-5 SIDE WALL COAXIAL VENTING FIGURE 6-4 - COAXIAL VERTICAL EXHAUST (MULTIPLE BOILERS) 12" (305 mm) Manufacturer Minimum Separation 18" Vertical Recommends Greater Separation Clearance to ventilated soffit 2” (50 mm) Min. 8" (181 mm) Max.

  • Page 33: Twin Pipe Systems

    6 - COMBUSTION AIR AND VENT PIPING FIGURE 6-7 - TWIN PIPE SEPARATED HORIZONTAL FLUE WARNING TERMINATION Asphyxiation hazard! Improper installation could result in death or serious injury. Read Twin Pipe Installation Instructions completely and understand all requirements before beginning installation. 6.10 Twin Pipe Systems Twin pipe venting allows exhaust flue and intake flue to be separated from each other.

  • Page 34: Securing Twin Pipe Polypropylene Venting

    6 - COMBUSTION AIR AND VENT PIPING FIGURE 6-10 - (NATALINI) CLAMP EXAMPLE Twin Pipe Maximum Vent Equivalent Lengths Terminating in same location 125/150 160/200 3" [80 mm] 3" [80 mm] 100 ft 100 ft Note: Twin Pipe Common Atmospheric Zone termination can be run horizontal or vertical 6.11 Securing Twin Pipe Polypropylene Venting Venting manufacturer's use a device to secure...
  • Page 35 6 - COMBUSTION AIR AND VENT PIPING FIGURE 6-11-TWIN PIPE ROOF VENT FIGURE 6-12 - HORIZONTAL TWIN PIPE, EXHAUST AND INTAKE 12" (305mm) Min. 15" 12" (305mm) (381mm) Minimum Separation Max. Roof Line Manufacturer Recommends Greater Separation Vent Combustion 12" (305mm) US, 18"...
  • Page 36 6 - COMBUSTION AIR AND VENT PIPING FIGURE 6-13 -TWIN PIPE SIDE WALL VENT (S-TYPE 12" (305 mm) Min. horizontal separation  TERMINATION) between combustion air intake and vent of same appliance.  12" (305 mm) Min. 84" (2.2 m) Max. 12"(305 mm) Min.

  • Page 37: Flexible Vent System

    6 - COMBUSTION AIR AND VENT PIPING 6.12 Flexible Vent System FIGURE 6-17 - FLEXIBLE VENTING SYSTEM Flexible Pipe Minimum & Maximum Vent Lengths 125/150 160/200 3” [80 mm] Vent Terminal Diameter Pipe 50 ft 6 ft 6 ft 75 ft Exhaust [15.2 m] [1.8 m]...
  • Page 38 6 - COMBUSTION AIR AND VENT PIPING FIGURE 6-18 - FLUE TERMINAL LOCATION All vent pipe and combustion air pipe and fittings shall comply with the following: Materials used in the U.S. must comply with the following standards: ANSI/ASTM D1785, ANSI/ASTMD2661, ANSI/ ASTM F441. INSIDE CORNER DETAIL Operable...

  • Page 39: Condensate Piping

    6 - COMBUSTION AIR AND VENT PIPING FIGURE 6-19 CONDENSATE DRAIN 6.13 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. if the drain line is connected •...

  • Page 40: Gas Supply & Piping

    Follow gas supplier’s *REFERENCE ONLY instructions. • If you cannot reach your gas supplier, call the fire Gas Rate FT /H (M Model department. Nat. GMHB125 119.6 (3.38) 48.0 (1.35) GMCB150 144.0 (4.08) 57.8 (1.64) NOTICE GMBH160 156.9 (4.44) 63.0 (1.78)

  • Page 41: Leak Check Gas Piping

    7 - GAS SUPPLY & PIPING 7.2 Leak Check Gas Piping NOTICE Pressure test boiler and gas connection before placing Sediment trap shall be located upstream of gas boiler in operation. controls. • Pressure test over 1/2 psig (3.5 kPa). Disconnect boiler and its individual gas shutoff valve from FIGURE 7-1 GAS LINE CONNECTION WITH MANUAL MAIN gas supply system.

  • Page 42: Electrical Connections

    8 - ELECTRICAL CONNECTIONS DANGER Model Size Power Supply 120V - 60Hz Electrocution Hazard! HIGH VOLTAGE - Connections in terminal block M1 are high voltage (120V / 60Hz). 133 W 142 W 173 W 182 W Power Consumption Before making connections, verify appliance is Internal Fuse (Qty.

  • Page 43: Access To Connection Block

    Terminals 4 - 5: outdoor temperature sensor connection (optional) Terminal 3 : Not Used Terminals 6 - 7 - 8: see section 8.5 for 24V T-Stat. Terminals 9 - 10: Indirect storage tank sensor connection for GMHB125 & GMHB160 models. PN 240012363 REV. B [03/29/2019]...

  • Page 44: Install Room Thermostat

    8 - ELECTRICAL CONNECTIONS FIGURE 8-4 THERMOSTAT CONNECTIONS 8.5 Install Room Thermostat 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 45: Optional Electrical Connections

    8 - ELECTRICAL CONNECTIONS FIGURE 8-7 1K Ω OUTDOOR SENSOR CONNECTIONS 8.6 Optional Electrical Connections A. 1K OHM Outdoor Temperature Sensor 1K Ω To connect this accessory, see Figure 8-7, terminals 4-5, and instructions supplied with sensor. See Chart 1 - 1K Ω...
  • Page 46 8 - ELECTRICAL CONNECTIONS Optional Equipment IMPORTANT: Sensors suplied with this boiler are proprietary to the manufacturer. Use of alternate market sensors WILL diminish boiler performanc CHART 1 - 1 k Ω OUTDOOR AIR SENSOR DATA CHART 2 - 10 k Ω INDIRECT TANK SENSOR DATA [°F] [Ohm] [°F]...

  • Page 47: Indirect Storage Tank

    8 - ELECTRICAL CONNECTIONS 8.7 Indirect Storage Tank Sensors supplied for this boiler are Note Boiler GMHB125 can be electrically connected to indirect proprietary to the manufacturer. Use of storage tank as follows: alternate sensors WILL diminish boiler 10k Ω...
  • Page 48 8 - ELECTRICAL CONNECTIONS HEAT ONLY BOILER WITH ZONE CIRCULATOR PUMPS & INDIRECT TANK (GMHB 160 ONLY) SUPPLY RETURN HOT WATER SUPPLY TEMPERED COLD WATER SUPPLY COLD WATER SUPPLY COMBI BOILER WITH ZONE CIRCULATOR PUMP (MODELS GMCB 150 & 200 ) SUPPLY RETURN DHW COLD...

  • Page 49: Wiring Diagrams

    8 - ELECTRICAL CONNECTIONS FIGURE 8-12A PN 240012363 REV. B [03/29/2019]...
  • Page 50 8 - ELECTRICAL CONNECTIONS FIGURE 8-12B LADDER DIAGRAM GMHB125 CENTRAL HEAT BOILER PN 240012363 REV. B [03/29/2019]...
  • Page 51 8 - ELECTRICAL CONNECTIONS FIGURE 8-13A PN 240012363 REV. B [03/29/2019]...
  • Page 52 8 - ELECTRICAL CONNECTIONS FIGURE 8-13B LADDER DIAGRAM GMCB150 COMBI BOILER PN 240012363 REV. B [03/29/2019]...
  • Page 53 8 - ELECTRICAL CONNECTIONS FIGURE 8A-14A PN 240012363 REV. B [03/29/2019]...
  • Page 54 8 - ELECTRICAL CONNECTIONS FIGURE 8-14B LADDER DIAGRAM LADDER DIAGRAM GMHB160 CENTRAL HEAT BOILER 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 FLOW X12-2...
  • Page 55 8 - ELECTRICAL CONNECTIONS FIGURE 8-15A PN 240012363 REV. B [03/29/2019]...
  • Page 56 8 - ELECTRICAL CONNECTIONS FIGURE 8-15B LADDER DIAGRAM GMCB150 COMBI BOILER PN 240012363 REV. B [03/29/2019]...

  • Page 57: Start Up Procedure

    9 - START UP PROCEDURE 9.1 Central Heating System Connections - HEAT ONLY GMHB125 HEATING ONLY GMHB160 HEATING ONLY WITH OPTIONAL INDIRECT DHW CONNECTION LEGEND 125B 160B Heating return connection 1" NPT Gas shutoff connection 3/4" NPT Indirect tank supply connection 3/4"...

  • Page 58: Gas Conversion

    • For Combi models, open cold water supply inlet valve. Turn on all hot water taps. Allow water to flow until no air is present. Turn off taps. See page 7- Physical Data and GMHB125 section 2.7 Operational Features. GMCB150 •...

  • Page 59: Commission Setup (Electric)

    9 - START UP PROCEDURE 9.7 Control Panel 9.6 Commission Setup (Electric) Check electrical connections to thermostat and other Refer to section 10.3 for Control Operation. external controls. Check any other connections to boiler. Control display will light immediately when power is applied. Check electrical connections, particularly the ground Press and hold for 6 seconds, to display information as...

  • Page 60: Commission Setup (Gas)

    9 - START UP PROCEDURE WARNING NOTICE Fire, explosion, and asphyxiation hazard! Boiler is set During initial ignition, burner may not ignite. This may for natural gas from the factory. If propane is to be cause boiler to shut down until any air in gas pipes is used the gas valve must be adjusted before turning vented.
  • Page 61 9 - START UP PROCEDURE FIGURE 9-2 - COMMISSIONING FUNCTION FLOW CHART To complete the function check: • Power supply (120V; 60Hz + T-fuse) • Heat exchanger (Central Heating or Domestic How Water) Power Supply Short Display push shows Display shows "000"...

  • Page 62: Combustion Adjustment

    9 - START UP PROCEDURE FIGURE 9-3 - GAS INLET AND NOZZLE 9.11 Combustion Adjustment To measure combustion efficiency and emissions of products Gas Pipe of combustion, boiler has two dedicated built in test ports. See Figure 9-4. Use combustion analyzer to properly set gas valve. Orifice Allow time between adjustments for your combustion analyzer to sense adjusted CO...

  • Page 63: Chimney Sweep Function/Manual Co2 Adjust

    Gas A Gas A Gas A Gas E (LPG) (Natural Gas) (Natural Gas) (Natural Gas) (Natural Gas) COMBUSTION TABLE All Sizes GMHB125 GMCB150 GMHB160 GMCB200 Nominal value 10.0 Maximum power (100%) Permitted value 8.2 – 9.3 6.3 – 4.3 8.5 – 9.5 5.7 –...

  • Page 64: Check Firing Rate

    • Use ½, 1 or 2 cu ft dial on gas meter. Measure time required for two or more complete revolutions. Measure for one or more minutes. Boiler Model - PARAMETER P13 (%)/ Heating Output time • Calculate input. For Natural Gas : GMHB125 3600 x cu ft Input (MBH) GMCB150 Btu/hr seconds...

  • Page 65: 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 66: 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 67 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 68 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 69 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 P70 = 30...
  • Page 70 10 - OPERATING INSTRUCTIONS PN 240012363 REV. B [03/29/2019]...
  • Page 71 10 - OPERATING INSTRUCTIONS PN 240012363 REV. B [03/29/2019]...
  • Page 72 10 - OPERATING INSTRUCTIONS PN 240012363 REV. B [03/29/2019]...
  • Page 73 10 - OPERATING INSTRUCTIONS PN 240012363 REV. B [03/29/2019]...
  • Page 74 10 - OPERATING INSTRUCTIONS PN 240012363 REV. B [03/29/2019]...
  • Page 75 10 - OPERATING INSTRUCTIONS PN 240012363 REV. B [03/29/2019]...
  • Page 76 10 - OPERATING INSTRUCTIONS PN 240012363 REV. B [03/29/2019]...
  • Page 77 10 - OPERATING INSTRUCTIONS 10.3.7 Command Functions (Service Use) To enter the Command functions menu press with a long push. This function ends after 3 minutes or by pressing simultaneously with a long push. After accessing the Special functions menu “F00” is displayed. Address/Page Knob is used to scroll between FXX parameters.

  • Page 78: Boiler Operation

    10 - OPERATING INSTRUCTIONS 10.4 Boiler Operation 10.8 Pump Domestic hot water supply always takes priority over central If display is switched on and boiler has not operated for 24 heating. hours for heating or hot water, pump will operate automatically for one minute every 24 hours.

  • Page 79: 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 80: 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 81: Component Replacement And Cleaning

    11 - GENERAL MAINTENANCE AND CLEANING 11.4 Draining the Boiler DANGER • turn boiler off Before servicing, turn off electrical power to boiler at • isolate electrical supply service switch. Close manual gas valve to turn gas • close boiler gas service cock supply OFF to boiler.

  • Page 82: Combi (Dhw)

    11 - GENERAL MAINTENANCE AND CLEANING 11.6 Combi (DHW) Model GMCB150 Install an appropriate water treatment system compliant with current regulations. For installations using well water or areas with sediment in the water supply, a sediment filter is manufacturer recommended. 11.7 The Cold Water Filter Boiler is fitted with a cold water filter located on DHW hydraulic assembly (B).

  • Page 83: User Information

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

  • Page 84: Ratings And Capacities

    CH Input, MBH Net AHRI (1)(3) Model Heating (1)(2) CH AFUE% Number Capacity, MBH * Maximum Minimum Rating Water, MBH GMHB125 24.5 95.0 GMCB150 24.5 95.0 GMHB160 32.0 95.0 GMCB200 32.0 95.0 (1) 1000 Btu/hr (British Thermal Units Per Hour) (2) Heating Capacity and AFUE (Annual Fuel Utilization Efficiency) are based on DOE (Department of Energy) test procedures.
  • Page 85 12 - RATINGS AND CAPACITIES LP gas (E) Natural gas (A) 17.4 mbar 27.4 mbar GMHB125 7.0 in w.c. 11.0 in w.c. (Heat Only Boiler) 0 - 2000 Ft 0 - 2000 Ft 0 - 610 m 0 - 610 m Parameter P71 * MAX.

  • Page 86: Troubleshooting

    13 - TROUBLE SHOOTING 13.1 Initial Fault Finding Checks 13.2 Error Diagnostics Check gas, water and electrical supplies are available at The PCB allows the display to list errors accrued in the boiler. the boiler. PCB has a counter which increases itself only if the anomaly is consecutive repetition.
  • Page 87 13 - TROUBLE SHOOTING The phase status is a special sub-operating mode before the Error diagnostics are displayed in the following sequence. error. Diagnostic Error Display Example: Stand-by Pre-purging function active Ignition load purging between the first attempt and second one. Ignition load first attempt Operation active E133...

  • Page 88: Errors Codes

    13 - TROUBLE SHOOTING 13.4 Errors 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 outdoor sensor External RF probe fault Check the sensor Differential water flow switch fault (still Check the water flow switch open)

  • Page 89: Errors In Fault History Only

    13 - TROUBLE SHOOTING ERROR- INTERNAL ERROR ACTION CODE CODE Check the sensing electrode and the cable, flue Safety error for frequent loss of flame E128/ recirculation and CO setting. Check the sensing electrode and the cable, flue Safety error for frequently loss of flame recirculation, enable the automatic calibration E129 with max correction during the ignition...

  • Page 90: Glossary

    14 - GLOSSARY • APPLIANCE - Device to convert gas into energy; term • DIRECT VENT BOILER - Boiler constructed and installed so includes any component, control, wiring, piping or tubing all combustion air is derived directly from outdoors and all required to be part of the device.
  • Page 91 14 - GLOSSARY • METRIC GAS METERS • TWO PIPE SYSTEM - Type of venting that allows for exhaust flue and intake air piping to be separated from each Natural Gas other. Fresh air may be drawn in at a different area from 127,116 x cu meters where flue terminal is located.
  • Page 92 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.

This manual is also suitable for:

Gmhb160Gmcb150Gmcb200

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