Special Conditions; Safety Relief Valve - Baxi LUNA DUO-TEC 60 GA Installation Instructions For The Installer

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.
FIGURE 5-1 Safety Relief Valve Discharge Piping

Safety Relief Valve

Do not use
plastic pipe see
Warning Above
Do not expose boiler and condensate piping to freezing temperatures.

5.2 Special Conditions

• System piping exposed to freezing conditions: Use inhibited propylene glycol solutions certified by fluid manufacturer for
use with closed water heating system. Do not use automotive or ethylene glycol.
• Boiler installed above radiation level (or as required by authority having jurisdiction). Integral low water pressure switch is
provided in boiler.
• Boiler used in connection with refrigeration system. Install piping in parallel with boiler, with appropriate valves to prevent
chilled medium from entering boiler.
• System piping connected to heating coils located in air handling unit exposed to refrigerated air circulation. Install flow
control valves or other automatic means to prevent gravity circulation of boiler water during cooling cycle.
Burn and scald hazard. Safety relief valve could discharge steam or hot water during operation. Install
discharge piping per these instructions.
5.3 Safety Relief Valve
• Install safety relief valve using field sourced fittings as shown in 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. 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).
WARNING
!
Check Local Codes For
Maximum Distance To Floor
WARNING
!
Field Sourced
(elbow and nipple)
NOTICE
15
240012485 REV C [06/30/2019]