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components to buy in order to supply heat to the distribution
system. The MZ is a “mechanical room on the wall.” Labor
savings are dramatic.
If a system is designed with a run temperature of 180°-200°F,
extra radiation may be needed since the MZ is not designed
for such high temperatures.
7. The MZ is wall hung, zero clearance, and direct vent (uses
no room air). It can be mounted almost anywhere; above
the washer / dryer in the laundry room, in a pantry,
bathroom, closet, kitchen - you name it. Because it has
no footprint, it is extremely valuable in condos and
apartments.
INTRODUCTION
8. MZ Heating System facts:
• Longest successful history of reliability of all high
efficiency, fully condensing heating systems.
• ISO 9001 certified.
• Perfect for radiant heating.
• EPA Energy-star listed.
• CSA Listed for Canada & US.
The rest of this manual should give you all the information
needed to properly plan, install, maintain and service this state
of the art, ultra high efficiency heating system.
Flame inspection port
(visible from cabinet door).
27-watt nearly silent air
inlet combustion turbine.
THE MONITOR MZ 25C
Heat exchanger exhaust outlet.
Adjustable system
water temperature control.
Condensate trap.
Heating system supply
water outlet from below
(connection in back).
System return water inlet
with stainless steel strainer
to prevent clogging.
Flue gas
outlet.
Pre-mixing stainless steel burner.
Extremely
reliable spark
ignitor
Cast aluminum water jacket.
Stainless steel finned-tubed
heat exchanger.
Rubber gasket for
cabinet seal
Pressure relief valve.
Air Eliminator- NOTE: Air vent
on top is fully serviceable
without need to drain system.
Grundfos®1542 3-speed
circulator pump.
Electrical interface panel for
thermostat & household power.
Water proving flow switch.
Stainless steel fill &
drain ball valve.
Combustion air intake via
concentric flue housing.
Air flow proving switch.
Honeywell® gas valve.
Convenient tapping for
flue gas measurement.
System water
temperature/pressure indicator.
Gas inlet pipe.
On/Off switch.
Summer/Winter switch.
Expansion-tank NOTE: Easyoff
expansion tank connection.
(Typical of quick piping
connections and extremely easy
parts access throughout.)
Grommets for electrical wiring.
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