XLT XD-9004A - Manual (Page 48)

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AVI HOOD ELECTRICAL CONNECTIONS
MUA Damper Relays - Single Output - Standard Voltage & Frequency
Supply from Breaker Panel
10 Amperes Maximum
TS 1
Neutral
TS 2
MUA Unit Relay
A1 A2
Power Power
Some wiring removed for clarity. See schematic for details.
R3 R2 R1