Cn24Relay-Kit-Cm3 (Optional Parts) Installation - Mitsubishi Electric TRANE NTXAMT12A112AA Service Manual

9.3. CN24RELAY-KIT-CM3 (Optional Parts) installation

The following section describes installation of the External Heater Adapter that connects to SVZ-KP-NA
series indoor unit. This products is the special wiring parts to drive an electric heater with the air
conditioner.
(1) Parts list
Check that the following parts are included in the package.
1. External output cable..................................................................... 2 in total
Two types of cables with different connectors are included.
2. Panel heater connector.................................................................. 3 in total
White: 3
(2) Connection to the indoor unit
Use the cables that fit the connectors on the indoor unit control board.
1. External output cable
This cable is used to connect a relay circuit for an interlocked operation with either an electric or a
panel heater.
Select the heater output pattern (1st = CN24-1 or 2nd = CN24-2) to use, and connect the cable to the
connector on the indoor unit control board that corresponds to the selection.
2. Panel heater connector
This connector is used to perform an interlocked operation with a panel heater. Depending on the
indoor unit control board specification, connect the cable to CN4Y as appropriate.
CN4Y for FAN control
(CN24RELAY-KIT-CM3)
3) Wiring
• A basic connection method is shown below.
Remote control board Relay circuit
Electric Heater
or panel
heater
Preparations in the field
• The length of the electrical wiring for the CN24RELAY-KIT-CM3 is 2 meters (6-1/2 ft.)
• To extend this length, use sheathed 2-core cable.
Control cable type: CVV, CVS, CPEV or equivalent.Cable size: 0.5 mm
Don't extend the cable more than 10 meters (32ft)
Specifications are subject to change without notice.
NTXAMT12, 18, 24, 30, 36A112AA
Adapter
X
X
(applicable only when a panel
heater is connected)
Maximum cable length
is 10 m (32ft)
34
Indoor unit
control board
CN24
Red 1
White 2
CN4Y
White 1
3
2
~ 1.25 mm
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2
(16 to 22 AWG)