INSTALLATION (continued) PAGE 18
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Installation of Fill Valve Drain, Pressure Gauges and Pressure Relief Valve
1. Using the appropriate bushing and nipple, install a 1/2” iron tee in tapping #4 (at the rear
of the boiler). Install a boiler drain on this tee.
2. Pipe feed water to the boiler through a WATTS1156F fill valve (not supplied) into the
other end of the tee. Where required by law, a backflow preventer must be installed in
the line to the fill valve. A backflow preventer is recommended, particularly when any
chemicals, such as freeze protection chemicals, are added to the boiler water. The
backflow preventer protects your drinking water from contamination.
3. Install the Pressure/Temperature Gauge in tapping #5 on the front of the boiler.
Pressure and Temperature Gauge
Install the pressure and temperature gauge by threading it into the ¼” threaded tapping above
and to the left of the loading door. Use a wrench to thread into the boiler. Twisting the dial by
hand will damage the gauge.
4. Install the 10-102-05 30 psi Boiler Pressure Relief Valve (supplied in safety package)
into tapping #3 (rear of boiler). Please note as per the instructions attached to the valve,
that the relief valve should be mounted vertically.
NOTE: 1. THIS BOILER RELIEF VALVE MUST BE INSTALLED TO ENSURE SAFE
OPERATION OF THE BOILER AND FOR PROTECTION OF THE HEATING
SYSTEM.
2. The Boiler Relief Valve discharge line MUST BE PIPED TO WITHIN 6” OF THE
FLOOR NEAR A DRAIN AND MUST BE 1” PIPE WITH NO REDUCTION. If
this valve operates, hot water will be discharged. It should be piped to an open
drain so that this water will not damage the room in which the boiler is located.
Low Water Cut-Off
If the boiler is installed above the level of the radiation, or as required by the authority having
jurisdiction, a low water cut-off device must be installed.
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