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4.2.2.2 Sensor for Remote Modulation
If "Sensor for Remote Modulation" is selected, the next screen allows the user to adjust two settings:
•
DHW Tank Setpoint Temperature
o This is the desired domestic hot water setpoint temperature to maintain in the storage
tank.
•
Max DHW Appliance Temperature
o This is the maximum allowable supply temperature for the P-K MACH
domestic hot water operation. If the P-K MACH
this value, the appliance will be forced to return to "Standby".
o NOTE: The "Max DHW Boiler Temperature" must exceed the desired domestic hot water
temperature. For the most efficient and reliable operation, it is recommended to find the
lowest possible appliance setpoint which satisfies the domestic hot water load
requirements.
These setpoint temperatures can be adjusted in one of 3 methods:
1. Use the <UP> or <DOWN> arrows to adjust the setpoint in increments of 1°F.
2. Move the slider bar left or right to perform quick adjustments to the setpoint.
3. Press the numeric temperature value to access a numeric
0-9 keypad. Once the keypad is displayed, the user can
enter the desired setpoint value.
After the "DHW Tank Setpoint Temperature" and "Max DHW Boiler
Temperature" values have been programmed, press <NEXT> to
continue. Proceed to
Section
4.2.3 On/Off Differentials
The final screen of the Setup Wizard asks the user to adjust the
"on differential" and the "off differential" as shown to the right. A
visual representation of the appliance's "DHW Tank Setpoint
Temperature" is shown by the horizontal white line. The "on
differential" is the lower temperature deadband which will enable
®
the P-K MACH
appliance for operation and is represented by the
dashed green line. The "off differential" is the upper temperature
deadband which will disable the P-K MACH
represented by the dashed red line.
In the example to the right, the "DHW Tank Setpoint Temperature"
is 153°F, the "on differential" is 4°F, and the "off differential" is 7°F.
In this scenario, the P-K MACH
the tank temperature drops below 153°F – 4°F = 149°F. The P-K
®
MACH
appliance will continue to operate until the tank
temperature exceeds 153°F + 7°F = 160°F.
Once the "on differential" and "off differential" are programmed, press <NEXT> to proceed. The NURO
will present a confirmation screen with a 30 second countdown timer. Press <HOME> to return to the
home screen, or simply wait for the timer to expire. The MACH 'n' Roll
respond to the aquastat installed in the domestic water storage tank.
Revised: January 3, 2020
Released: January 3, 2020
4.2.3.
®
appliance and is
®
appliance will be enabled when
Patterson Kelley 2020
All Rights Reserved.
®
P-K MACH
Gas Fired Appliance
Technical Service 1.877.728.5351
®
appliance's supply temperature reaches
®
™
system is now programmed to
1004905989 MnR & MnRP 300-399-500-750-
1050 NURO Rev C (Jan-2020).docx
appliance during
Page 32
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