•Installation •
IIIb Water piping — relief valve
Install relief valve
Figure 8
Install and pipe relief valve
Refer to Figure 8 for location of the relief valve on the boiler.
Install the relief with the spindle vertical in the ¾" tapping on top left of the back section, as shown.
To avoid water damage or scalding due to valve operation, a metal discharge line must be connected to relief valve outlet and run to a safe place of disposal. Terminate the discharge line to eliminate possibility of severe burns should the valve discharge.
Discharge line must be as short as possible and be the same size as the valve discharge connection throughout its entire length.
Discharge line must pitch downward from the valve and terminate at least 6" above the floor drain where any discharge will be clearly visible.
The discharge line shall terminate plain, not threaded, and must be rigid metallic pipe of material suitable for temperatures of 375 °F or greater.
Do not pipe the discharge to any place where freezing could occur.
No shutoff valve shall be installed between the relief valve and boiler, or in the discharge line. Do not plug or place any obstruction in the discharge line.
Failure to comply with the above guidelines could result in failure of the relief valve to operate, resulting in possibility of severe personal injury, death or substantial property damage.
Test the operation of the valve after filling and pressurizing system by lifting the lever. Make sure the valve discharges freely. If the valve fails to operate correctly, replace it with a new relief valve.
1 Jacket plug for unused relief valve jacket opening.
2 Jackets are provided with two relief valve openings because each jacket size is used for two boiler sizes. Cover the unused opening with the plug provided.
3 Boiler relief valve (from accessory bag)
4 ¾" x 3" nipple, provided in accessory bag
5 ¾" relief valve tapping in back section
6 Connect minimum ¾" discharge piping to relief valve.
See WARNING above.
85008
Part number | 27 |