Section 2 — Installation
2-20 Part No. 750-263
F. BOILER WATER PIPING
1. General
All boiler hot water outlet and return piping is connected at the rear
of the boiler. Piping is to be installed per local codes and
regulations.The pipelines for the hot water outlet and return may be
connected in the usual manner without removing the cladding
elements. Unused connectors must be safely blanked off.
2. Water Temperature Sensors
Fasten the return water temperature sensor to the lower return pipe
with a hose clamp and cover with insulation (see Figure 2-13).
Install the outlet temperature sensor in the hot water outlet
thermowell (see Figure 2-14).
3. Safety Valve
Pressure relief valve (Safety Valve) should be piped from the air vent
piping or hot water outlet pipe (see Figure 2-15). Use pipe sealing
compound and a flat sided wrench when securing the Safety relief
valve. Do not use a pipe wrench and do not over tighten the relief
valve. The safety valve must be mounted in a vertical position so
that discharge piping and code-required drains can be properly
piped to prevent buildup of back pressure and accumulation off
oreign material around the valve seat area. Apply only a moderate
amount of pipe compound to male threads and avoid
overtightening, which can distort the seats. Use only flat-jawed
wrenches on the flats provided.
4. Pressure drop curves
The information in Figures 2-16 through 2-26 and in Tables 2-13
and 2-14 can help in determining pump requirements for Model
CFC installations.
Figure 2-13 Hot Water Return
Temperature Sensor Mounting
Figure 2-14 Outlet Temperature
Sensor Well (top of boiler)
Figure 2-15 Pressure Relief
Valve Piped to Safe Point of
Discharge
Only properly certified personnel such as the safety valve
manufacturer’s certified representative should adjust or repair the
boiler safety valve. Failure to follow this warning could result in
serious personal injury or death.
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