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1.
Differential Pressure Transducer
– Monitors the air pressure differential between two points. This
transducer is used in different air control options.
2.
40VA 120V to 24V Transformer
(TR-xx)
– Verify transformers on schematics. Will vary by application.
3.
20VA 120V to 24V Transformer
(TR-xx)
– Verify transformers on schematics. Will vary by application.
4.
Convenience Outlet Circuit Breaker (CB-02)
– Protects transformer for convenience outlet
from high
current spikes.
5.
Circuit Breaker (CB-01)
– Protects electrical components from high current spikes.
6.
Terminal Strip
– Central location to terminate control wiring. Should be used for troubleshooting.
7.
24V DC Power Supply (PWS-01)
– Converts input voltage of
100-240V AC
to an output voltage of
24V DC
.
8.
RJ45 Converter
– Communication port for a Cat 5 cable that allows components to connect to other
components.
9.
Induced Draft Air Sensor (PS-01)
– A safety device located near the draft inducer motor that will
prevent operation of the furnace if correct venting air pressures are not detected.
10.
MUA Board
- Controls the
0-10V DC
signal to modulating furnace controls, modulating gas valve, and
24V AC
signals to staged furnace controls.
11.
Flame Safety Control (FSC-01)
– Initiates and monitors flame. Equipped with non-adjustable time
settings for pre-purge, inter-purge, and post-purge of the exhaust flue and control cabinet.
12.
750V 230/460V to 120V Transformer
– Used for the convenience outlet. Voltage inputs 208/230/480.
13.
Clogged Filter Switch
(PS-10)
– Senses whether the filters at the intake to the main supply motor are
free of dirt and contaminant. This is an optional component.
14.
VFD Controller (VFD-01)
– Used to protect supply motor, and to control the speed of the motor to vary
airflow across unit.
15.
Distribution Block
– Distributes power to condensing components.
16.
Disconnect Switch
(SW-01)
– Controls all electrical power to the entire unit.
17.
Compressor Drive Frequency Converter (VFD-02)
– Operates the compressor.
18.
Compressor Local Control Panel (LCP)
– Used to navigate the compressor’s VFD controls.
19.
HMI Panel
– MUA board interface. The 4 buttons are used to navigate through the menu screens.
20.
Convenience Outlet Transformer (TR-09)
– 2000VA transformer used for the convenience outlet.
Voltage inputs 208/230/480.
21.
Door Switches (DS-xx)
– These switches operate the LED lights inside the cabinet.
