Filter
Top Products
27Part number 550-141-850/0699
• Installation • Start-Up • Parts • Maintenance
Water piping — relief valve
85008
Figure 8
Install and pipe relief valve
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.
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.
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.
IIIb
Install relief valve