Specifications
45
Pressure / Temperature Relief Valve Replacement
If the pressure or pressure and temperature relief valve mounted on the tank is not
functioning correctly and must be replaced, follow the procedures outlined below.
1. Follow Steps 1 through 5 of the shutdown procedure (page 19) to take the unit
off-line before attempting to replace the pressure gauge.
t The combination of electricity and water can pose a very dangerous situation.
Assure that all power has been shut off / disconnected and locked out in an
approved manner, before attempting any installation or maintenance procedures.
2. After assuring that the power has been turned off, the pressure bled from the tank,
the water drained, and the unit has cooled, disconnect the drain line leading from
the relief valve to drain.
Note: For Electric Steam Boilers, disconnect the vent line leading from the relief
valve to atmosphere (usually through the roof), and via a drip elbow, to drain.
3. Carefully unscrew the relief valve from the port in the tank.
4. Install the new valve by screwing it into the relief valve port in the tank. Follow
recommendations contained in the manufacturer's documentation, local codes, or
accepted contractor practices as to the use and / or type of joint compound or
sealer at the connections.
5. Reconnect the drain line leading from the relief valve to drain.
Note: For Electric Steam Boilers, reconnect the vent line leading from the relief valve
to atmosphere and, via drip elbow, to drain.
6. Follow the startup procedures (page 17) to put the unit back on-line. Carefully
check all connections for any sign of leakage.
Pressure Gauge - Replacement
If the pressure gauge for the unit is not functioning correctly and must be replaced, follow
the procedures outlined below.
1. Follow Steps 1 through 5 of the shutdown procedure (page 19) to take the unit
off-line before attempting to replace the pressure gauge.
t The combination of electricity and water can pose a very dangerous situation.
Assure that all power has been shut off / disconnected and locked out in an
approved manner, before attempting any installation or maintenance procedures.