Lennox GCWB95W-150 Application Manual
Condensing wall mounted gas boiler
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Also See for GCWB95W-150:
- Installation instructions manual (64 pages) ,
- User's information manual (9 pages)
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Summary of Contents for Lennox GCWB95W-150
- Page 1 APPLICATION GUIDE PRODUCT LITERATURE Lennox Industries Inc. Dallas, Texas FOR USE WITH GCWB95W-150 GCWB95W-205 CONDENSING WALL MOUNTED GAS BOILER This manual has been prepared for use with the appropriate Installation, Operation and Maintenance Manual. PN 240012998 REV A [04/15/2020]...
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Page 2: Table Of Contents
TABLE OF CONTENTS Important Safety Information ..................3 Labor Saving Piping Manifolds / Near Boiler Piping Connections ........4 General Information - Hydronic Piping ................5 General Information - Wiring ..................6 Piping and Wiring Diagrams Piping Legend ......................7 150 &... -
Page 3: Important Safety Information
IMPORTANT SAFETY INFORMATION 1. General 3. Installation shall conform to requirements of Boiler installation shall be completed by qualified agency. authority having jurisdiction or in absence of such See Installation, Operation & Maintenance Manual for requirements: additional information. • United States •... -
Page 4: Labor Saving Piping Manifolds / Near Boiler Piping Connections
LABOR SAVING PIPING MANIFOLDS / NEAR BOILER PIPING CONNECTIONS GCWB95W-205 COMBI GCWB95W-150 COMBI LEGEND Pressure Gauge Pressure Relief Valve 30.00 psi [2.11 bar] Heating return connection 3/4" [22.2 mm] 1" [25.4 mm] 1/2" Cold DHW inlet tap 3/4" NPT [15.9 mm]... -
Page 5: General Information - Hydronic Piping
GENERAL INFORMATION - HYDRONIC PIPING WARNING FOR YOUR SAFETY READ BEFORE OPERATING Burn and scald hazard! Manufacturer requires installation of field supplied anti-scald valve. DANGER Failure to follow these instructions could result in death or serious injury. General Information: Piping installation, materials, and joining methods shall conform to requirements of authority having jurisdiction or in absence of such requirements: •... -
Page 6: General Information - Wiring
GENERAL INFORMATION - HYDRONIC PIPING Provided Wiring and Piping illustrations Water 1st Degree Burn 2nd and 3rd Degree Burn Note are meant to show system concepts only. Temperature Exposure Time For Exposure Time For An Installer is responsible for all equipment Setting An Adult Adult... -
Page 7: Piping Legend
PIPING LEGEND PIPING LEGEND ZONE VALVE TEMPERATURE & PRESSURE GAUGE EXPANSION TANK BALL VALVE FLAT PLATE HEAT EXCHANGER AIR SEPERATOR (COMBI ONLY) STRAINER CIRCULATOR DRAIN MAGNETIC DIRT SEPARATOR COMBINATION FILL FLOW CHECK VALVE BYPASS VALVE DIVERTER VALVE T&P OR RELIEF VALVE THERMOSTATIC MIXING VALVE PURGE VALVE PN 240012998 REV A [04/15/2020]... -
Page 8: 150 & 205 With Zone Circulator Pumps - Piping Diagram
150 & 205 WITH ZONE CIRCULATOR PUMPS - PIPING DIAGRAM PN 240012998 REV A [04/15/2020]... -
Page 9: 150 & 205 With Zone Pumps - Wiring Diagram
150 & 205 WITH ZONE PUMPS - WIRING DIAGRAM PN 240012998 REV A [04/15/2020]... -
Page 10: 150 & 205 With Zone Valves - Piping Diagram
150 & 205 WITH ZONE VALVES - PIPING DIAGRAM PN 240012998 REV A [04/15/2020]... -
Page 11: 150 & 205 With Zone Valves - Wiring Diagram
150 & 205 WITH ZONE VALVES - WIRING DIAGRAM PN 240012998 REV A [04/15/2020]... -
Page 12: Buffer Tank - Piping Diagram
LOW MASS - PIPING DIAGRAM Buffer Tank Piping When installing low mass systems, additional water mass may be required to avoid short cycling by the boiler. In these applications it is recommended that a buffer tank be installed. Buffer Tank on Central Heat Circuit Note: •... -
Page 13: Optional Equipment & Accessories
OPTIONAL EQUIPMENT Optional Equipment IMPORTANT: Sensors supplied with this boiler are proprietary to the manufacturer. Use of alternate market sensors WILL diminish boiler performanc Outdoor Air Sensor, if used. 1k Ω A. Boiler automatically recognizes sensor when used. B. See Chart 1 for sensor data. Sensor part number BD710487302V C. - Page 14 ACCESSORIES Accessories: • Use lower value of range as the desired Kt value. 1. 1k Ω Outdoor Temperature Sensor Kit - (example): to deliver 186°F water @ OT of -20°F = Kt range is 90 thru BD710487302V 25. Select 25. Use Outdoor Sensor Kit with Heating Only or Combi Boilers.
- Page 15 ACCESSORIES Management of 0-10V Input The functions with 0...10V regulator are activated by means of their parameters. When the function is enabled (P82=3) and P78=1, the input manages the heating set point temperature directly; when P78=2, the input manages the heating power input directly. Demand is activated above 3V and the heating setpoint is calculated in proportion to deviation from 3 to 10 V DC, to give a setpoint that goes from minimum to maximum.
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Page 16: Wiring Diagrams
150 - COMBI WIRING DIAGRAM MODEL 150 - Combi PN 240012998 REV A [04/15/2020]... -
Page 17: 205 - Combi Wiring Diagram
205 - COMBI WIRING DIAGRAM MODEL 205 - Combi PN 240012998 REV A [04/15/2020]... -
Page 18: Altitude Effects On Boiler Performance
ALTITUDE EFFECTS ON BOILER PERFORMANCE MODEL GCWB95W-150 MODELS 125/150 CALCULATED EFFECTS OF HI-ALTITUDE ON BOILER PERFORMANCE 160,000 140,000 120,000 DHW MODE 100,000 HEAT MODE 80,000 60,000 NET RATNG HEAT MODE 40,000 2,000 4,000 6,000 8,000 10,000 ALTITUDE (FEET) MODEL GCWB95W-205... -
Page 19: Low Water Cutoff
A - LOW WATER CUTOFF • Locate LWCO sensing device in the supply Low Water Cut Off piping, above the minimum height of boiler. These guidelines are supplied when necessary to install See Figure A-2, Piping Diagram. an additional Low Water Cut Off (LWCO), for sensing a low water level condition in a boiler, as required by the •... -
Page 20: Piping Diagram - Lwco Location
LOW WATER CUTOFF Piping Diagram - LWCO Location Low Water Cutoff (LWCO) (See Figure 3 for detail) Arrange piping to prevent water Note dripping onto boiler. Air Vent Illustrations are meant to show Note system piping concept only. Installer Supply is responsible for all equipment and Position LWCO Above Top of Boiler... -
Page 21: Low Water Cutoff - Detail
LOW WATER CUTOFF Low Water Cutoff - Detail PN 240012998 REV A [04/15/2020]... -
Page 22: Error Code Table
ERROR CODE TABLE NOTE: When instructed press and hold the 'Reset' for between 1-3 seconds to reset the boiler. Initial Fault Finding Checks 1. Check that gas, water and electrical supplies are available at the boiler. Table Of Error Codes 2. -
Page 23: Troubleshooting Chart
TROUBLESHOOTING CHART PN 240012998 REV A [04/15/2020]... - Page 24 TROUBLESHOOTING CHART PN 240012998 REV A [04/15/2020]...
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Page 25: Fault Solution Sections
FAULT SOLUTION SECTIONS Fault Finding Solutions Sections Power supply 120V Main terminals L and N Check electrical supply Connection OK at connector x1 0 Integrity of the fuse Replace fuse Main or Display Display PCB fault illuminated PCB - X1 0 connector Check wiring Mains terminals L &... - Page 26 FAULT SOLUTION SECTIONS Temperature sensor faulty. Check correct location and wiring Temperature sensors faulty. _ _ �.,, Replace sensor , _ _ Cold resistance approximately ° 10k0 @ 77 F (CH sensor) ° 20k0 @ 77 F (Flue sensor) (resistance reduces with increase in temp.) Gas at burner Ensure gas is on and purged .----------------, NO...
- Page 27 FAULT SOLUTION SECTIONS Overheat thermostat operated or Check for and correct any system faulty. faults (water circulation). Allow to cool. Continuity �I across thermostat terminals � Replace safety thermostat '---------------' more than 1.5 ohm Is E11 O is still flashing Check Flow, Return, Replace PCB sensors.
- Page 28 Verify the position of the Service key Check obstruction in the flue duct Remove the obstruction on the flue pipe Performs the calibration function (see the Service manual) Check the electrical connection between Ru and pcb PRODUCT LITERATURE Lennox Industries Inc. Dallas, Texas...
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