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MZ INSTALLATION & MAINTENANCE
From Factory To 3-way To Indirect tank or
Harness valve motor High temp thermostat
Either black to Black
Either black to #2 on BS tank
Brown to #1 on BS tank
Orange to Brown
Grey to Blue
Green Ground terminal
(connect to ground) on tank
Red - not used
Red - not used
DHW KIT-MPI #9523
• Rapid way to offer two
temperatures
• Priority to DHW Zone
Monitor’s domestic hot water kit (part #
9523) allows for the zoning and control of
any indirect tank, or any two or more
temperature applications - one usually
being DHW recovery - with the higher temp
being a priority. This system utilizes the
built-in control feature that allows the non prioritized space-
heat side to be regulated by the main temperature knob and
the high temp side controlled by a strap-on aquastat.
The kit contains a factory wiring harness, 3-way valve, motor, and
strap on aquastat. The heating system output’s first connection
is the “AB” port of the 3-way valve. All system water flow thru the
“B” port will be controlled by the MZ’s main temp knob and the
heating thermostats. The “A” port will be the primary hi temp
circuit for DHW recovery. The “A” port is also a priority zone.
Wire the aquastat in series with the high limit on the MZ’s
water jacket. Strap the bulb to the leaving water pipe just
behind the combustion- air fan. Cover with foam insulation.
Secure with nylon ties; not ultra tight. Adjust leaving water
temp. at 170º to 175º F. Scratching the paint off the water
pipe will give a more accurate temp reading.
MPI #9110
MZ MOD CONTROL / MPI #9110
The MZ Mod Control comes with modulating control, 2 strap
on sensors, instruction manual, outdoor sensor, & wiring
harness.
Control Features:
• Versatile, easily adapts to all common piping methods.
• Heating system inlet and outlet sensors
• Optional primary loop sensor
• Optional DHW sensor.
• Smart control feature can adapt to the building.
• Exercising of heating system pump.
• Purging of heating system based on time.
MZ MOD CONTROL SPECIFICATIONS
Control — Microprocessor PID Control. This is not a safety (limit) control
Enclosure — Enclosure D, back Noryl Plastic
Optional Devices — Universal Sensor
Dimensions — 4-3/4" H x 2-7/8" W x 1-7/8 D (120 x 74 x 48 mm)
Approvals — CSA C US, meets ICES & FCC regulations for EI/RFI
Power Supply — 24 V 50/60 Hz 75 VA
Pump / Stage 1 Relay — 120 V (ac) 5 A 1/6 hp, pilot duty 240 VA
Stage 2 Relay — 120 V (ac) 3 A 1/6 hp
Alarm Relay — 24 V (ac) 3 A 1/6 hp
Ambient Conditions — Indoor use only, -40 to 140º F (40 to 60º C) <90% RH non-condensing
Sensors Include — NTC thermistor, 10 kW @ 77º F (25º C 0.2º C) B = 3892 2 of Universal Sensor and 1 of Outdoor Sensor
• Display of temperatures & run times
• Error messages for sensor failure with alarm signal.
• Minimum on and off delays
• Adjustable differential.
• Smart control feature adapts to each heating system.
• Built-in test sequence.
• Building occupants can be locked out of installer’s settings.
ACCESSORIES
Heating System Ground
MZ Heating System
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