Trane Mitsubishi Electric TPEFYP006MS140C Technical & Service Manual page 26

[ VII Microprocessor Control ]
2) TPEFYP-MA143A, TPEFYP-MH142A and other models
Remote control board Relay circuit
Electric Heater
or panel
heater
Preparations in the field
For relay X, use the specifications given below.
Operation coil
Rated voltage: 12VDC
Power consumption: 0.9W or less
* Use the diode that is recommended by the relay manufacturer at both ends of the relay coil.
The length of the electrical wiring for the PAC-YU25HT is 2 meters (6-1/2 ft.)
To extend this length, use sheathed 2-core cable.
Control cable type: CVV, CVS, CPEV or equivalent.
2
Cable size: 0.5 mm ~ 1.25 mm
Don't extend the cable more than 10 meters (32ft)
Recommended circuit
Wiring diagram
(4) Wiring restrictions
Keep the length of the cable connecting to the circuit board of the indoor unit shorter than 10 meters (32ft).
Longer than 10 meters (32ft) could cause improper operation.
Use a transit relay when extending wiring such as remote wiring.
HWE1833B
X
X
2
(16 to 22 AWG)
R
1-phase power
S
supply
208V, 230V/60Hz
R
S
Control board
CN24
Indoor unit
control board
Adapter
CN24
Red 1
White 2
CN22
White 1
2
(applicable only when a panel
Dip switch SW3-2 "ON"
heater is connected)
Maximum cable length
is 10 m (32ft)
H1
FS1
FS2
88H
H2
FS1
FS2
88H
26H
88H
- 19 -
Outdoor unit
control board
• TUHY,TURY type Dip
switch
SW4: 932 "ON/OFF"
• TUMY series
Dip switch SW5-4
"ON/OFF"
FS1, 2 ----- Thermal fuse
H1, H2 ----- Heater
26H --------- Overheat protection
thermostat
88H --------- Electromagnetic contactor
GB