Domestic Hot Water Piping Considerations - Patterson-Kelley MACH ‘n’ Roll with NURO Series Installation & Owner's Manual

3.4.5 Domestic Hot Water Piping Considerations

It is recommended to install the P-K MACH 'n' Roll
storage tank in order to minimize the overall length of piping. The P-K MACH 'n' Roll
fractional horsepower domestic water circulation pump which may have difficulty providing the design
flow rate if the piping is too long, or if there is excessive pressure drop through elbows, tees, valves, etc.
The pump performance curves and flow requirements are listed below for reference:
MnR300, MnR399 & MnR500 (1/3HP 3-Speed Lead-Free Bronze Circulation Pump)
MnR750 & MnR1050 (2/5HP Fixed Speed Lead-Free Bronze Circulation Pump)
Revised: January 3, 2020
Released: January 3, 2020
™
system as close as possible to the domestic water
Model
MnR300
MnR399
MnR500
Model
MnR750
MnR1050
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P-K MACH Gas Fired Appliance
Technical Service 1.877.728.5351
™
system features a
Design Flow Conditions
ΔP
through
GPM
MnR
(FT Head)
25 5
Design Flow Conditions
ΔP
through
GPM
MnR
(FT Head)
60 5
1004905989 MnR & MnRP 300-399-500-750-
1050 NURO Rev C (Jan-2020).docx
ΔP
Available
(FT Head)
9
ΔP
Available
(FT Head)
9
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