related to approximate water volume of the system. The system should be turned on to circulate water mix for about one hour and then flush clean with fresh water.
Before operating the boiler, the entire system must be filled with water, purged of air and checked for leaks. Do not use Stop Leak or other boiler compounds.
THE WATER HEATER SHOULD BE LOCATED IN AN AREA WHERE THE GENERAL PUBLIC DOES NOT HAVE ACCESS TO BOILER CONTROLS.
limit the maximum tank probe temperature for GW applications. Failure to do this will void the warranty. If the tank probe is not designated as the controlling probe, the staging of the unit will be controlled by the inlet probe and will not use the desired tank temperature as its base.
Refer to "Connection Diagram" in order to connect the tank probe to the boiler. See Figures 12 and 15.
See section titled "Temperature Setpoints" for instructions on how to set the temperature.
HOT WATER SUPPLY BOILER INSTALLATION
GAS CONNECTIONS
WATER LINE CONNECTIONS
Where excessive heat exchanger condensation exists due to continued low inlet water temperatures below 120°F (49°C), a bypass balance loop must be installed. See Figures 10 and 12.
HARD WATER CONDITIONS
Where hard water conditions exist, water softening or the threshold type of water treatment is recommended. This will protect the dishwashers, coffee urns, water heaters, water piping and other equipment. When water softening or water treatment is not practical, a comparatively easy method of periodic lime removal from the unit must be employed.
WARNING
LIME ACCUMULATION CAN REDUCE THE LIFE OF THE EQUIPMENT, REDUCE EFFICIENCY AND WASTE FUEL. BOILER FAILURE DUE TO LIME OR SCALE BUILDUP VOIDS THE WARRANTY.
Tank Probe (Optional)
In addition to the Inlet and Outlet/ECO Probes, units can be optionally equipped with a tank probe. The connection for the tank probe is located in the 24VAC junction box at the rear of the unit. The tank probe can be configured to control the staging of the unit. See "Tank Probe Installation Procedure" section below for additional information.
TANK PROBE INSTALLATION PROCEDURE
A tank probe is supplied with each hot water supply boiler (GW). To connect the tank probe to the boiler, remove the cover from the 24VAC junction box at the rear of the unit. Connect the probe wires across terminals 1 & 2. (The wires leading to the terminals will be yellow.) Check the field connection diagram located on this cover of the junction box to assure proper wiring.
Once the tank probe has been connected to the boiler, it must be designated as the controlling probe for the system. This is accomplished by changing two Dip Switch settings on the Central Control Board. First, Dip Switch
WARNING
THIS BOILER IS NOT INTENDED TO OPERATE AT GAS SUPPLY PRESSURE OTHER THAN SHOWN ON THE RATING PLATE. EXPOSURE TO HIGHER GAS SUPPLY PRESSURE MAY CAUSE DAMAGE TO GAS VALVES WHICH CAN RESULT IN FIRE OR EXPLOSION. IF OVERPRESSURE HAS OCCURRED SUCH AS THROUGH IMPROPER TESTING OF GAS LINES OR EMERGENCY MALFUNCTIONOFTHESUPPLYSYSTEM,THEGASVALVESMUSTBE CHECKED FOR SAFE OPERATION. MAKE SURE THATTHE OUTSIDE VENTSONTHESUPPLYREGULATORSANDTHESAFETYVENTVALVES ARE PROTECTED AGAINST BLOCKAGE. THESE ARE PARTS OF THE GAS SUPPLY SYSTEM, NOT THE BOILER. VENT BLOCKAGE MAY OCCUR DURING ICE
WHEN LOCAL CODES REQUIRE A MAIN MANUAL
IT IS IMPORTANT TO GUARD AGAINST GAS VALVE FOULING FROM CONTAMINANTS IN THE GAS WAYS. SUCH FOULING MAY CAUSE IMPROPER OPERATION, FIRE OR EXPLOSION. IF COPPER SUPPLY LINES ARE USED THEY MUST BE APPROVED FOR GAS SERVICE.
BEFORE ATTACHING THE GAS LINE BE SURE THAT ALL GAS PIPE IS CLEAN ON THE INSIDE.
TO TRAP ANY DIRT OR FOREIGN MATERIAL IN THE GAS SUPPLY LINE, A DIRT LEG (SOMETIMES CALLED DRIP LEG) MUST BE INCORPORATED IN THE PIPING. THE DIRT LEG MUST BE READILY ACCESSIBLE AND NOT SUBJECT TO FREEZING CONDITIONS. INSTALL IN ACCORDANCE WITH RECOMMENDATIONS OF SERVING GAS SUPPLIERS. REFER TO NATIONAL FUEL GAS CODE, ANSI Z223.1 OR CAN/CSA
THE BOILER AND ITS INDIVIDUAL SHUTOFF VALVE MUST BE DISCONNECTED FROM THE GAS SUPPLY PIPING SYSTEM DURING ANY PRESSURE TESTING OF THAT SYSTEM AT TEST PRESSURES IN EXCESS OF 1/2 PSI (3.5 KPA).
THE BOILER MUST BE ISOLATED FROM THE GAS SUPPLY PIPING SYSTEM BY CLOSING ITS INDIVIDUAL MANUAL SHUTOFF VALVE DURING ANY PRESSURE TESTING OF THE GAS SUPPLY PIPING SYSTEM AT TEST PRESSURES EQUAL TO OR LESS THAN 1/2 PSI (3.5KPA).
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