7
Information and specifications outlined in this manual in effect at the
time of printing of this manual. Manufacturer reserves the right to
discontinue, change specifications or system design at any time without
notice and without incurring any obligation, whatsoever.
2.5 Designated Use
• Hot water heating boiler.
• Indoor installation.
• Closet or alcove installation.
• Direct vent boiler.
• For use with natural gas or liquefied petroleum gases
(LP/propane).
• GMHB380 single vent pipe option.
2.6 The unit MUST NOT:
• Directly heat potable water. Indirect heating is acceptable.
• Heat water with non-hydronic heating system chemicals
present (example, swimming pool water).
• Exceed:
(GMHB227) - 50 psig (3.44 bar)
(GMHB380) - 80 psig (5.5 bar)
Maximum allowable working pressure, or drop below
minimum system pressure 7.25 psig (.50 bar)
• Exceed 176°F (80°C) system design temperature.
2.7
Operational Features
• Modulating: (GMHB227) 20-100% Input Rate.
(GMHB380) 16-100% Input Rate.
• Integral Dual Limit.
• Integral Low Water Pressure Cutoff.
• Outdoor Temperature Reset. (Optional)
• Heat exchanger over heat protection.
• Recommended system pressure (cold) 21.7 psig (1.5
bar)
2 - Introduction
2.1
Installation shall conform to requirements of authority
having jurisdiction or in absence of such requirements:
United States
• National Fuel Gas Code, ANSI Z223.1/NFPA 54.
• National Electrical Code, NFPA 70.
2.2
Where required by authority having jurisdiction,
installation shall conform to Standard for Controls and Safety
Devices for Automatically Fired Boilers, ANSI/ASME CSD-1.
Additional manual reset low water cutoff may be required.
2.3 Requirements for Commonwealth of
Massachusetts:
Boiler installation must conform to Commonwealth of
Massachusetts code 248 CMR which includes but is not limited
to:
Installation by licensed plumber or gas fitter.
2.4 Manufacturer recommends use of Carbon
Monoxide monitor may be requirement of local
jurisdiction.
PN 240012369, REV A [08/31/2018]
2 - INTRODUCTION
Содержание GMHB227
Страница 78: ...78 PN 240012369 REV A 08 31 2018 A 1 MODEL GMHB227 APPENDIX A WIRING DIAGRAMS...
Страница 80: ...80 PN 240012369 REV A 08 31 2018 A 2 MODEL GMHB380 APPENDIX A WIRING DIAGRAMS...
Страница 82: ...82 PN 240012369 REV A 08 31 2018 NOTES...
Страница 83: ...83 PN 240012369 REV A 08 31 2018 NOTES...
