TABLE OF CONTENTS Introduction Important Safety Information ....... 5 Boiler is designed for use in closed heating systems where Locating the Boiler ........6 all steam is returned as condensate and make-up water is Hydronic Piping .......... 8 minimal. Boiler is not designed for or intended for use in open systems using 100% make-up water.
IMPORTANT SAFETY INFORMATION General Installation shall conform to requirements of Boiler and venting installation shall be completed by authority having jurisdiction or in absence of such qualifi ed agency. to the National Fuel Gas Code, requirements ANSI Z223.1/NFPA 54. WARNING Where required by authority having jurisdiction, Fire, explosion, asphyxiation and electrical shock installation shall conform to Standard for Controls...
LOCATING THE BOILER Locating the Boiler Figure 2 - Minimum Clearances To Combustible Select level location as centralized with piping system, Construction and as near chimney as possible. 6” (152mm) Place crated boiler at selected location. Remove all crate material. Please recycle responsibly. View from top WARNING of boiler...
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LOCATING THE BOILER DANGER Figure 4 - Pressuretrol Assemly Burn, scald hazard. Pressuretrol must be installed by a qualifi ed service agency in accordance with manufacturer’s instructions, all applicable codes and requirements of authority having jurisdiction. Failure to follow the information in these instructions exactly will result in death or serious injury.
HYDRONIC PIPING WARNING Burn or Scald Hazard. Discharge line shall be installed to relief valve outlet connection to avoid burns, scalding, or water damage due to discharge of steam and/or hot water during operation. Discharge line shall: • Connect to safety valve outlet. Piped down to safe point of disposal. Check local codes for maximum distance from fl...
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HYDRONIC PIPING Recommended near boiler piping for gravity return Consider near boiler piping as part of the boiler for proper systems is shown in Figure 8 page 11. For gravity return water level control and to produce dry steam. systems, bottom of lowest steam carrying pipe, dry Correct near boiler piping is crucial to proper operation of return or end of steam main, must be at least 28”...
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HYDRONIC PIPING Figure 6a - Recommended Near Boiler Piping Using One Supply Tapping Main Vent Sections Risers Headers Equalizers 2" 2" 1½ Header 2" 2" 1½ 28" 24" Cap To Skimmer Tee Water Line 2" Hartford Loop Close Nipple 24" Equalizer 1½"...
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HYDRONIC PIPING Figure 7 - Recommended Near Boiler Piping For Pumped Return Systems Figure 8 - Recommended Near Boiler Piping For Gravity Return Systems...
FRESH AIR FOR COMBUSTION WARNING C. Refer to National Fuel Gas Code for opening Air openings to combustion area must not be requirements between connected indoor spaces. obstructed. Follow instructions below, to maintain • All Outdoor Air. Provide permanent opening(s) adequate combustion air communicating directly or by ducts with outdoors.
CHIMNEY AND VENT PIPE CONNECTION Boiler is equipped with factory wired harness that plugs WARNING into vent damper. Connect thermostat to orange and Installing or venting a boiler or any other gas white wires marked 24 volt thermostat on boiler. appliance with improper methods or materials could Vent pipe must be same size as fl...
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CHIMNEY AND VENT PIPE CONNECTION Insofar as is practical, close all building doors and Figure 9 - Typical Masonry Chimney Requirements windows and all doors between the space in which the appliances remaining connected to the common venting system are located and other spaces of the building. Turn on clothes dryers and any appliance not connected to the common venting system.
VENT DAMPER OPERATION Check vent damper and all fl ue product carrying Figure 10 - Horizontal Installation areas of boiler annually for deterioration from corrosion or other sources. If you see corrosion or Horizontal Installation other deterioration, contact your service agent for Flow repairs.
GAS SUPPLY PIPING CAUTION DANGER WHAT TO DO IF YOU SMELL GAS Fire Hazard. Do not use matches, candles, open fl ames, or other methods providing ignition source. • Do not try to light any appliance. Failure to comply will result in death or serious •...
ELECTRICAL WIRING Thermostat Installation WARNING Install thermostat on inside wall per manufacturer's Electrical shock hazard. Turn OFF electrical power instructions. supply at service panel before making electrical NEVER install thermostat on outside wall. connections. Failure to do so could result in death or serious injury.
OPERATING INSTRUCTIONS For Your Safety Read Before Operating STOP! Read the safety information on this page. WARNING Set the thermostat to lowest setting. Turn off all electric power to the appliance. If you do not follow these instructions This appliance is equipped with an ignition device which exactly, a fi...
OPERATING YOUR BOILER Thermostat WARNING A. Set thermostat to desired room temperature. Burn Hazard. Never run water into a hot empty B. Set thermostat to lower setting if heat is not boiler. Failure to follow these instructions could required result in death or serious injury. C.
CHECKING AND ADJUSTING Adjust Pilot Burner Figure 15 - Pilot Burner Pilot fl ame should surround 3/8” to 1/2” of pilot sensor. See Figure 15. To adjust Flame. Remove screw cover over pilot adjusting screw. See Figure 14. Insert small screwdriver and adjust fl ame as needed. Turn screw counterclockwise to increase fl...
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CHECKING AND ADJUSTING Adjust Steam Pressure Control Checking Controls • Steam pressure limit control (pressuretrol) shuts Low Water Cut-Off off gas to main burners when steam pressure in A. Turn off power to boiler or turn thermostat down to boiler reaches cut-off setpoint (i.e. sum of cut-in and lowest setting.
START-UP CLEANING Following fi nal blow-down, allow boiler to cool. WARNING • Add fresh water slowly up to normal water line. Following service procedures must be performed • Start burners. by qualifi ed service agent. Boiler owner shall not attempt these steps. Failure to do so could result in •...
GENERAL MAINTENANCE Low Water Cut-Off Boiler Water Treatment Other Than Cleaners Low Water Cut-Off interrupts electrical current to burner In steam systems where system is tight, free from leaks, when water line in boiler drops to low level. and all steam is returned to boiler as condensate, amount of make up water is small.
TROUBLESHOOTING You may avoid inconvenience and service calls by checking these points before you call for service. CAUTION WHAT TO DO IF YOU SMELL GAS • Do not try to light any appliance. • Do not touch any electrical switch; do not use any phone in your building.
WIRE DIAGRAMS Figure 17 - Isolation Relay Wiring For Steam Boilers With Probe Type Low Water Cut Off And Using An Electronic Thermostat - Optional Figure 18 - Water Feeder Connection - Optional Optional water feeder connection. • Connect feeder N to terminal 2. •...
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WIRE DIAGRAMS (For full-sized Wire Diagrams, see Literature Envelope.) Figure 19 - Wiring Diagram For Boilers With CG 400-2060 Probe Type Low Water Cut-Off BLOCKED VENT SWITCH PRESSURETROL VENT DAMPER CUT IN 120V / 24V, 50VA TRANSFORMER 120V AC FIELD CONNECTIONS IN ACCORDANCE WITH NEC / CEC AND LOCAL...
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WIRE DIAGRAMS (For full-sized Wire Diagrams, see Literature Envelope.) Figure 20 - Ladder Diagram For Boilers With CG 400-2060 Probe Type Low Water Cut-Off HIGH VOLTAGE CONNECTIONS PER NEC AND LOCAL CODES 120V / 24V, 50VA TRANSFORMER NEC CLASS 2 LOW WATER LOW VOLTAGE CUT OFF...