PB Heat Gas/Oil Boilers manual Install Controls and Trim, Install Safety Relief Valve

INSTALL CONTROLS AND TRIM

8. INSTALL CONTROLS AND TRIM

A.INSTALL SAFETY RELIEF VALVE

1.Pipe the Safety Relief Valve off of the 2-1/2" tapping at the upper left side of the Rear Section. Make sure the relief valve sizing meets local code requirements. See Figure 8.1.

CAUTION

Pipe the discharge of the Safety Relief Valve(s) away from any traffic area, preferably to a floor drain. This is necessary to prevent injury should the valve discharge.

Pipe the discharge full size of valve outlet.

B.INSTALL DRAIN VALVE

1.Install a 3/4" drain valve in the lower center tapping in the Rear Section. See Figure 8.1 and Figure 8.2.

2.Pipe the valve discharge to a floor drain if available or apply a nipple and cap to close off when not in use.

C.INSTALL LOW WATER CUTOFFS

1.See Figure 8.2 for the locations of tappings for probe type and float type low water cutoffs. The Front Section has a 3/4" tapping for a probe type control. The Rear Section has two 1" tappings for mounting a float type control.

D.INSTALL CONTROLS & TRIM

1.Install the Temperature-Pressure Gage in the 1/2" tapping at the upper center of the Front Section. See Figure 8.2.

2.Mount the Operating Temperature Limit Control bulb well in the Coil Cover Plate at the upper right of the Front Section. Place the well in the right side 3/4" control tapping of the cover plate if a Tankless Heater is not installed there. If a tankless heater is installed at this location (Position 2), mount the well in the center 3/4" control tapping of the coil. See Figure 8.2.

Figure 8.1: Safety Relief Valve Piping

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