12
WARNING
Burn or Scald Hazard. Discharge line shall be installed to relief valve outlet connection to avoid burns,
scalding, or water damage due to discharge of steam and/or hot water during operation.
Discharge line shall:
• Use ¾" or larger pipe.
• Use pipe suitable for temperatures of 375°F (191°C) or greater.
• Individual boiler discharge piping shall be independent of other discharge piping.
• Size and arrange discharge piping to avoid reducing safety relief valve relieving capacity below
minimum relief valve capacity stated on rating plate.
• Run pipe as short and straight as possible to location protecting user from scalding and properly drain
piping.
• Install union, if used, close to safety relief valve outlet.
• Install elbow(s), if used, close to safety relief valve outlet and downstream of union (if used).
• Terminate pipe with plain end (not threaded).
Refer to local codes and appropriate ASME Boiler and Pressure Vessel Code for additional installation
requirements.
!
CONNECTING SUPPLY AND RETURN PIPING
12.
Install limit sensor in supply pipe. See Figure 13
.
• Install nipple and tee.
• Install well in tee.
• Insert sensor into well. Secure with clip.
• Secure sensor wire to jacket with cable clamps.
• Plug sensor wire into limit. See wiring diagram.
13.
Install safety relief valve. See Figure 14.
• Install safety relief valve in rear section using
provided nipple and elbow.
• Install discharge piping. Follow instructions in
Warning above.
Figure 14
Safety Relief Valve With Discharge
Line
Check local codes
for maximum
distance from floor
or allowable safe
point of discharge.
Discharge Line
Safety Relief Valve
Figure 13
Limit Sensor
Well
Supply
Pipe
Limit Sensor
Cable
Clamps
Limit
Temperature
Pressure Gauge
Tee
