FULTON PulseHW Series Installation, Operation And Maintenance Manual page 26

e) Connect return water to boiler return water connection.
f) Install an air separator and air eliminator (air vent) which is necessary as there is no built
in boiler air eliminating feature.
1. If a sealed diaphragm-type expansion tank is used, install air eliminator
in hot water piping at air separator.
2. If an air cushion type expansion tank is used, pipe tank directly into boiler
supply.
3. On multi zoned systems (or a system with both space and domestic
water heating), air elimination must be provided either in the common
piping or every loop.
4. When the boiler is installed at a higher level than baseboard radiation, air
elimination must be provided directly above the unit.
g) Install hot water circulator, remote mounted from boiler. Do not attach directly to the
boiler. Flexible connectors must be placed between the circulator and the boiler.
1. For all models, a no flow condition will not damage the heat exchanger,
however, adequate flow should be provided to prevent tripping the boiler
on high temperature limit.
2. For boilers with carbon steel heat exchangers, maximum allowable
temperature differential across the heat exchanger is 170 degrees F.
Minimum outlet temperature for carbon steel units must be 120 degrees
F or greater. Maximum allowable outlet temperature is 240 degrees F.
3. For boilers with duplex steel heat exchangers, maximum allowable
temperature differential across the heat exchanger is 100 degrees F.
There is no minimum outlet temperature for duplex steel. Maximum
allowable outlet temperature is 210 degrees F.
h) Install manual purging valves in all loops and zones. Install pressure reducing (automatic
fill) valve in the cold water fill line to the boiler system.
i) Check that the proposed operation of zone valves, zone circulator(s) and diverting valves
will not isolate air separator(s) and/ or expansion tank(s) from the boiler.
j) Clearance from hot water pipes to combustibles must be at least 6".
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.
Fulton Heating Solutions, Inc. -- PHW Manual -- 2010-0713
Note
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