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•
STEP 6 – Open the stem of the appliance's safety relief valve.
•
STEP 7 – If available, open the manual isolation valves in the domestic piping. This will fill the
domestic side of the heat exchanger with water.
•
STEP 8 – Open the manual isolation valve ahead of the expansion tank/fill valve assembly. This
will fill the appliance side of the heat exchanger with water.
•
STEP 9 – When water escapes from the boiler's safety valve discharge, close the stem of the
safety relief valve.
•
STEP 10 – Ensure the water pressure is at least 12 psig in the appliance piping. If the water
pressure is less than 12 psig, drain the water in the appliance piping and refer to
charge the expansion tank. When the expansion tank is charged properly, repeat Steps 1
through 9.
•
STEP 11 – Check for any leaks in the appliance piping, especially at the Victaulic couplings as
these may have loosened during shipment. Tighten or reseat the connections if necessary.
•
STEP 12 – Check for any leaks in the domestic piping, especially at the Victaulic couplings and
pump flanges which may have loosened during shipment. Tighten or reseat the connections if
necessary.
Revised: January 3, 2020
Released: January 3, 2020
Patterson Kelley 2020
All Rights Reserved.
®
P-K MACH
Gas Fired Appliance
Technical Service 1.877.728.5351
Section 3.3.4
1004905989 MnR & MnRP 300-399-500-750-
1050 NURO Rev C (Jan-2020).docx
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