Safety Relief Valve And Air Vent; Trim Piping; System Piping - ECR International Dunkirk DCBF-75 Manual

!
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.
When installing safety relief valve it must
Note
be installed in a vertical position with
spindle at top.

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).

6.4 Trim Piping

• Temperature - Pressure Gauge. Install temperature
pressure gauge using tee and bushing provided in
near boiler piping on supply side. See Figure 6-2.
• Some boiler models may have integral drain valve
located inside jacket directly underneath pump.
Install external drain valve as required.

6.5 System Piping

• Ensure plugs are removed from boiler water
connections.
• See Figure 6-5 for basic system piping
configurations.
6 - HYDRONIC PIPING
• Systems with automatic fill valves require back flow
prevention device.
• Single boiler system. See Figures 6-2, 6-5, 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.
• Manufacturer recommends installing an isolation
and purge valve to use during commissioning to
ensure the boiler does not shut down due to over-
temperature. See figure 6-2 for details.
• Do not install isolation valve between boiler and any
field installed LWCO.
• If soldering piping to boiler, avoid over heating and
damaging seals and gaskets.
• Connect system valve pipe work to the 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.
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240013509 REV A, [03/15/2022]