17
WARNING
Burn and scald hazard. Safety relief valve could
discharge steam or hot water during operation.
Install discharge piping per these instructions.
!
5 - HYDRONIC PIPING
5.3 Safety Relief Valve and Air Vent
• Install safety relief valve. See Figure 5-2.
• 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. Do not
use plastic pipe.
• Use ¾" or larger pipe.
• Use pipe suitable for temperatures of 375°F (191°C) or
greater. Do not use plastic pipe on safety relief valve.
• 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).
FIGURE 5-2 SAFETY RELIEF VALVE DISCHARGE PIPING
WARNING
Burn and scald hazard. Safety relief valve could
discharge steam or hot water during operation.
Use pipe suitable for temperatures of 375°F (191°C) or
greater. DO NOT use plastic pipe.
!
Check Local
Codes For
Maximum
Distance To Floor
Safety Relief
Valve
Do not use
plastic pipe see
Warning
below.
PN 240012363 REV. A [08/31/2018]
TP Gauge
