Water Piping And Trim - Crown Boiler PHANTOM-X SERIES Installation And Operating Instructions Manual

VI. Water Piping and Trim
Failure to properly pipe boiler may result in improper operation and damage to boiler or structure.
Install boiler so that the gas ignition system components are protected from water (dripping, spraying,
rain, etc.) during appliance operation and service (circulator replacement, etc.).
Oxygen contamination of boiler water will cause corrosion of iron and steel boiler components, and
can lead to boiler failure. Crown Boiler Co.' Standard Warranty does not cover problems caused by
oxygen contamination of boiler water or scale (lime) build-up caused by frequent addition of water.
Do not fill boiler with softened water to prevent chloride contamination.
Installation is not complete unless a safety relief valve is installed into the tapping located on left side
of appliance or the supply piping.
A. Installation of Factory Supplied Piping and
Trim Components
1. Install provided components per Figure
25 for PHNTM399C or Figure 26 for the
PHNTM500C. Rear tapping is return/inlet.
Front tapping (middle on PHNTM399C) is
supply/outlet. Piping and trim components are
located in miscellaneous parts carton shipped
with the boiler.
a. Safety Relief Valve – Install on tee off 3/4 in.
NPT tapping on PHNTM399C or on tee off
supply tapping on the PHNTM500C. Use
Figure 25: Factory Supplied Piping and Trim Installation - PHNTM399C
NOTICE
provided 10 in. long nipple to locate valve above
heat exchanger top.
b. Drain Valve – Install on tee off 3/4" NPT
tapping on PHNTM399C or on tee off supply
tapping on PHNTM500C.
c. Temperature and Pressure Gauge – Install on
supply piping.
d. Flow Switch – Install on supply piping. Use
provided tee with 1 in. NPT outlet. Use correct
paddle per Table 23. Refer to Section VIII
"Electrical" for flow switch wiring.
e. Install drain valve into tee bottom outlet.
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