28
6.3 Safety Relief Valve and Air Vent
•
Install safety relief valve using pipe fitting provided
with boiler. See Figure 6-1.
•
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).
Check Local
Check Local
Codes For
Codes For
Maximum
Maximum
Distance To Floor
Distance To Floor
Safety Relief
Valve
Do not use
plastic pipe see
Warning
above.
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. Install discharge
piping per these instructions.
!
6 - HYDRONIC PIPING
FIGURE 6-1 Safety Relief Valve
6.4 Trim Piping
•
Temperature - Pressure Gauge. Install temperature
pressure gauge in near boiler piping on supply side.
•
Some boiler models may have integral drain valve located
inside jacket directly underneath pump. Install external
drain valve as required.
NOTICE
When installing safety relief valve it must be installed
in a vertical position with spindle at top.
6.5 System Piping
•
See Figure 6-6 for basic system piping configurations.
•
Systems with automatic fill valves require back flow
prevention device.
•
Single boiler system. See Figures 6-5, 6-6, for general
guidance. Additional considerations:
•
Boiler control only supports integrated pump. Installer
responsible for integration of multiple central heating
pumps using field supplied external control.
•
Boiler control allows domestic hot water
prioritization.
•
Thoroughly flush all hydronic piping.
•
Secure all valves/fittings to boiler.
•
Route pressure relief valve discharge piping to the floor.
Follow local code with respect to necessary distance to the
floor.
See Figure 6-1.
•
Verify all drain valves are closed.
240012879 REV A, [01/31/2020]
Summary of Contents for Dunkirk DCBF-125
Page 63: ...61 A 1 MODELS 125 Heat Only APPENDIX A WIRING DIAGRAMS 240012879 REV A 01 31 2020...
Page 64: ...62 APPENDIX A WIRING DIAGRAMS A 2 MODELS 165 Heat Only 240012879 REV A 01 31 2020...
Page 65: ...63 A 2 MODELS 150 Combi APPENDIX A WIRING DIAGRAMS 240012879 REV A 01 31 2020...
Page 66: ...64 A 4 MODELS 205 Combi APPENDIX A WIRING DIAGRAMS 240012879 REV A 01 31 2020...
Page 67: ...65 NOTES 240012879 REV A 01 31 2020...
Page 68: ...66 NOTES 240012879 REV A 01 31 2020...
Page 99: ...29 MODEL 150F Combi 150F FLOOR STANDING COMBI WIRING DIAGRAM PN 240012875 REV A 01 31 2020...
Page 101: ...31 205F FLOOR STANDING COMBI WIRING DIAGRAM MODEL 205F Combi PN 240012875 REV A 01 31 2020...
Page 106: ...36 Low Water Cutoff Detail LOW WATER CUTOFF NO NO YES PN 240012875 REV A 01 31 2020...
Page 114: ...44 NOTES PN 240012875 REV A 01 31 2020...
