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•
If applicable, verify the operating aquastat is functioning properly.
5.1.4 Annually
•
The brazed plate heat exchanger can scale up with calcium and other minerals present in the
domestic water. This will inhibit heat transfer and it may be necessary to clean or replace the
brazed plate heat exchanger. Cleaning the brazed plate heat exchanger may be needed to
ensure continued performance.
•
Remove and inspect the circulating pumps for signs of deterioration. Repair or replace if needed.
•
Clean and inspect the P-K MACH 'n' Roll
connections. Repair or replace if needed.
5.2 Accessing the Components (MnR & MnRP, 750 & 1050)
The P-K MACH 'n' Roll
and service.
1. Lockout/tag out gas supply to the appliance.
2. Lockout/tag out electrical service to the appliance and P-K MACH 'n' Roll
3. If available, close the isolation valves in the domestic piping between the storage tank and the P-K
MACH 'n' Roll
™
system.
4. Open the drain valves on the appliance piping and the domestic piping. Allow the water content to
drain completely.
5. Open the Victaulic couplings on the appliance piping at the rear of the P-K MACH 'n' Roll
6. Open the 2" copper Victaulic coupling on the domestic piping at the rear of the P-K MACH 'n' Roll
system.
7. Remove the 2" pump flange on the domestic piping at the rear of the P-K MACH 'n' Roll
8. Remove the front panel of the P-K MACH 'n' Roll
9. Pull the components out the front surface by grabbing either the brazed plate heat exchanger or the
supporting tray. The components should pull out smoothly to allow for easier access and inspection.
or fingers near moving parts or pinch points.
NOTE: THE ABOVE LISTED MAINTENANCE ITEMS ARE FOR THE MACH-N-ROLL PORTION
OF THIS UNIT. SEE THE P-K MACH
MAINTENANCE ITEMS REQUIRED FOR THE P-K MACH
Revised: January 3, 2020
Released: January 3, 2020
™
750/1050 designs allow the user to pull out the components for easier access
Use caution when moving the lower tray in and out. Avoid placing hands
®
APPLIANCE O&M MANUAL FOR IMPORTANT
Patterson Kelley 2020
All Rights Reserved.
™
system for any signs of cracks, leaks, or loose
™
system.
®
APPLIANCE.
1004905989 MnR & MnRP 300-399-500-750-
®
P-K MACH
Gas Fired Appliance
Technical Service 1.877.728.5351
™
system.
™
™
system.
1050 NURO Rev C (Jan-2020).docx
system.
™
Page 34
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