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ECM INTERFACE BOARD LAYOUT
Y
GGGGR
W
O
Y2
Y1
G
R
C
Y2
Y1
G
O
W
C
R
DH
AL
1
A
A
AL
1
SW
1
SW
2
SW
3
SW
4
SW
5
SW
6
SW
7
SW
8
SW
9
OFF
ON
G
DEH
UM
C
FM
T
B1
J
1
S
1
BM
(ECM)
ECM
INTERFACE
BOARD
BM
(ECM)
SW1
S
W2
S
W3
S
W4
S
W5
S
W6
S
W7
S
W8
S
W9
OFF
O
N
AL — Alarm Relay Contacts
ASTAT — Aquastat
BM — Blower Motor
BR — Blower Relay
CB — Circuit Breaker
CC — Compressor Contactor
CO — Sensor, Condensate Overflow
DDC — Direct Digital Control
DTS — Discharge Temp Switch
ECM — Electronically Commutated Motor
FP1 — Sensor, Water Coil Freeze Protection
FP2 — Sensor, Air Coil Freeze Protection
HP — High-Pressure Switch
HWG — Hot Water Generator
JW1 — Jumper, Alarm
NSB — Digital Night Setback
LOC — Loss of Charge Pressure Switch
MV — Motorized Valve
NEC — National Electrical Code
LEGEND
P1 — Field Wiring Terminal Block
RVS — Reversing Valve Solenoid
TRANS — Transformer
Field Line Voltage Wiring
Field Low Voltage Wiring
Printed Circuit Trace
Relay/Contactor Coil
Condensate Pan
Solenoid Coil
Thermistor
Ground
Wire Nut
NOTES:
1. Compressor and blower motor thermally protected internally.
2. All wiring to the unit must comply with NEC and local codes.
3. FP1 thermistor provides freeze protection for water. When using antifreeze solutions, cut JW3
jumper.
4. Typical Aquazone™ thermostat wiring shown. Refer to thermostat installation instructions for wiring
to the unit. Thermostat wiring must be Class 1 and voltage rating equal to or greater than unit supply
voltage.
5. 24-v alarm signal shown. For dry alarm contact, cut AL2 dry jumper and dry contact will be available
between AL1 and AL2.
6. Transformer secondary ground via Deluxe D board standoffs and screws to control box. (Ground
available from top two standoffs as shown.)
7. Fan motors are factory wired for medium speed. For high or low speed, remove BLU wire from fan
motor speed tap “M” or “3” and connect to “H” or “2” for high speed or “L” or “4” for low speed.
8. Place jumpers on 2 and 3, ECM board, when dehumidification mode is used.
Fig. 20 — Wiring of 50PTH,PTV,PTD026-072 Units with Deluxe D Controller, Three Phase (460 V)