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NOTE: The power distribution on the P-K MACH 'n' Roll
pumps as well as to the P-K MACH
disconnect to the 4"x4" junction box and power the entire system. Connect a single grounded, code-
compliant disconnect to JB-1 (Junction Box 1) to the three wire pig-tails (hot, neutral and ground).
6.2 Wiring Diagram – Controls for DHW Operation
In standard DHW operation, the P-K MACH 'n' Roll
closed aquastat, or a 12kΩ thermistor-type temperature sensor (preferred). This aquastat or
temperature sensor should be installed in the lower 1/3
size for the application. It is important that the sensing element is of sufficient length to accurately
measure the storage tank temperature. Wire either the aquastat's normally-closed terminals or the 2
sensor wires to the boiler's DHW STAT/SENSOR terminals (TB1-9 & TB1-10).
A normally-closed high temperature limit aquastat MUST be installed either in the domestic hot water
supply pipe exiting the P-K MACH n' Roll
which supplies the building. Wire the normally-closed terminals of the high temperature limit aquastat to
the appliance's START INTERLOCK #1 terminals (TB2-7 & TB2-8).
Revised: January 3, 2020
Released: January 3, 2020
™
®
appliance. This allows the user to bring a single code-compliant
™
system is capable of operating to either a normally-
rd
of a domestic water storage tank of suitable
™
system, or in the storage tank or domestic hot water pipe
Patterson Kelley 2020
All Rights Reserved.
P-K MACH
Technical Service 1.877.728.5351
system provides power to the circulation
1004905989 MnR & MnRP 300-399-500-750-
1050 NURO Rev C (Jan-2020).docx
®
Gas Fired Appliance
Patterson Kelley, LLC
Page 37
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