Amana xMVM97 series Installation Instructions Manual page 5

This product may be installed with the ComfortNet thermostat
and a non-ComfortNet compatible single stage air conditioning
unit. However, this reduces the benefits of the ComfortNet sys-
tem as the enhancements will only apply to the furnace.
The modulating furnace operation is based off of negative
pressure created by the draft inducer. The furnace control
board receives commands from the room thermostat. The
furnace control board then controls the RPM of the (3 phase)
inducer by varying the frequency and voltage to the in-
ducer. This is known as variable frequency drive (VFD). The
inducer, pressure switches, and gas valve are linked by pneu-
matic tubing. The gas valve modulates based on this nega-
tive pressure.
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UPFLOW/HORIZONTAL
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Figure 1
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COUNTERFLOW/HORIZONTAL
Figure 2
Gas Valve
Gas Line Entrance (Alternate)
Pressure Switch(es)
Gas Manifold
Combustion Air Intake Connection
Hot Surface Igniter
Rollout Limit
Burners
Flame Sensor
Flue Pipe Connection
Flue Pipe
Primary Limit
Gas Line Entrance
Flue Pipe Connection (Alternate) NK
Rubber Elbow
Variable-Speed Induced Draft Blower
Electrical Connection Inlets (Alternate)
Coil Front Cover Pressure Tap
Coil Front Cover Drain Port
Drain Line Penetrations
Drain Trap
Blower Door Interlock Switch
Inductor (Not All Models)
Integrated Control Module
(with fuse and diagnostic LED)
24 Volt Thermostat Connections
Transformer (40 VA)
ECM Variable Speed Circulator Blower
Auxiliary Limit
Junction Box
Electrical Connection Inlets
Coil Front Cover
"H" Fitting
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