Fulton Heating Solutions, Inc. -- PHW Manual -- 2010-0713
Page 12
Caution
The discharge from safety relief valve shall be so arranged that there will be no danger of scalding
personnel. When the safety relief valve discharge is piped away from the boiler to the point of
discharge, there shall be provisions made for properly draining the piping.
Warning
No shutoff of any kind shall be placed between the safety relief valve and the boiler or on the
discharge pipe between such valve and the atmosphere. Doing so can cause an accidental
explosion from overpressure.
Note
The boiler, when used in conjunction with a refrigeration system, must be installed so the chilled
medium is piped in parallel with the boiler with appropriate valves to prevent the chilled medium
from entering the boiler. If the boilers are connected to heating coiIs, located in air handling units
where they may be exposed to refrigerated air circulation, such boiler piping systems shall be
equipped with flow control valves or other automatic means to prevent gravity circulation of the
boiler water during the cooling cycle.
Note
See the above chart for required gas line size, based on overall Iength of pipe from meter plus
equivalent length of all fittings. Approximate sizing may be based on 1,000 BTU for 1 cubic foot of
natural gas.
Caution
Some soaps used for leak testing are corrosive to certain types of metals. Rinse all piping
thoroughly with clean water after leak check has been completed.
Warning
Do not use matches, candles, flame or other sources of ignition to check for gas Ieaks.
Note
The vent line connection on the gas pressure regulator and the low and high gas pressure
switches must be piped to outdoor air by installer in accordance with the National Fuel Gas Code,
ANSI Z223- 1-1991 or latest addenda.
In Canada gas installations must be in accordance with the current CAN/CGA B149.1 and .2 and/or
local codes.
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