15
WARNING
Burn and scald hazard. Safety relief valve could
discharge steam or hot water during operation.
Install discharge piping per these instructions.
!
FIGURE 5-2 Safety Relief Valve Discharge Piping
Safety Relief Valve
5 - HYDRONIC PIPING
5.3 Safety Relief Valve and Air Vent
•
Install safety relief valve and air vent using pipe fittings
provided with boiler. See figure 5-1
• Install safety relief valve with spindle in vertical position.
•
Do not install shutoff valve between boiler and safety
relief valve.
• Install discharge piping from safety relief valve. See
figure 5-2.
• 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).
Check Local Codes For
Check Local Codes For
Maximum Distance To
Maximum Distance To
Floor
Floor
[50-100 Size Shown]
PN 240011320 Rev. G 10/01/2021]