Installation - Mitsubishi Electric TRANE NTXAMT12A112AA Service Manual

11.2. Installation

A basic connection method is shown below.
Sequence of operation:
1. The ERV demand switch closes CNER
2. 12VDC is provided to CN2C to turn on ERV
3. If the unit goes into defrost, CN2C stops 12VDC output
ERV Switch:
Non-Voltage a-contact input
Contact rating voltage >= 15VDC
Contact rating current >= 0.1 A
Minimum applicable load <= 1mA at DC
ERV output
Condition
CNER input
Cool/Heat/Fan operation
OFF Defrost
STOP
Cool/Heat/Fan operation
ON Defrost
STOP
RC: Remote controller
Specifications are subject to change without notice.
NTXAMT12, 18, 24, 30, 36A112AA
Part Number: PAC-740
max 30 ft.
Fan speed
RC setting
STOP
STOP
RC setting
STOP
STOP
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Control board control box
CN2C output
(=Fan output)
ON
OFF
OFF
ON
OFF
ON
Control box