21.7 Single-Stage, Single-Phase Unit with CT Motor and Electric Heat
Fig. 35 Single-Stage, Single-Phase Unit with CT Motor and Electric Heat
PART No.
LUG
GROUND
UNIT
CO YRG
24
EMS
RV
BMR
DPS
AUX
LWV
LWV
FACTORY WIRE
FIELD WIRE
OPTIONAL COMPONENTS LEGEND:
[ ] A2L - AIR TO LIQUID REFRIGERANT LEAK SENSOR
[ ] A2R - A2L BLOWER RELAY
[ ] AUX - AUXILIARY RELAY
(FOR LOOP PUMP, ETC)
[ ] BMR - BLOWER MONITOR RELAY
[ ] CBR - 24V CIRCUIT BREAKER (75VA & 100VA ONLY)
[ ] CMR - COMPRESSOR MONITOR RELAY
[ ] DPS - DIFFERENTIAL PRESSURE SWITCH
[ ] DS - DISCONNECT SWITCH
[ ] EMS - ENERGY MGMT SYSTEM RELAY
[ ] HSL - HIGH TEMPERATURE SUCTION LIMIT
(WITH HOT GAS BYPASS ONLY)
[ ] LWV - LEAVING WATER VALVE
STANDARD COMPONENTS LEGEND:
BM - BLOWER MOTOR
CAP - COMPRESSOR CAPACITOR
CC - COMPRESSOR CONTACTOR
CS - CONDENSATE SENSOR (IN DRAIN PAN)
FS - FREEZE SENSOR
EHR - ELECTRIC HEATING/BLOWER RELAY
HE - HEATING ELEMENT
HLS - HEATING LIMIT SWITCH
HPS - HIGH PRESSURE SWITCH
HC - HEATING CONTACTOR
LPS - LOW PRESSURE SWITCH
RV - REVERSING VALVE (HEAT PUMPS)
GROUND
BLK (COM)
TRANSFORMER
CC
T1
L1
T2
L2
L1 L2
DS
CAP
COMP
C
R
S
NOTES:
1. SEE UNIT NAME PLATE FOR ELECTRICAL RATING.
2. ALL FIELD WIRING MUST BE IN ACCORDANCE WITH
N.E.C.-N.F.P.A. #70, COPPER CONDUCTORS ONLY - CONDUCTEURS EN CUIVRE SEULEMENT.
3. 208/230V UNITS ARE FACTORY WIRED FOR 230V OPERATION. FOR 208V OPERATION,
REMOVE PRIMARY LEAD FROM 240 TERMINAL AND CONNECT IT TO 208. CAP ALL UNUSED TERMINALS.
4. FOR ALTERNATE EMS COIL VOLTAGES CONSULT FACTORY.
5. UPM-I INCLUDES BUILT IN: 270-300 SECOND RANDOM START
300 SECOND DELAY ON BREAK
120 SECOND LOW PRESSURE BYPASS
6. "TEST" DIP SWITCH REDUCES DELAYS TO 10 SEC WHEN SET TO YES. MUST BE SET TO "NO" FOR NORMAL OPERATION.
7. "FREEZE SENSOR" ON CONDENSER WILL BE SET TO 25°F OPERATION BY DEFAULT, IF 15°F OPERATION IS REQUIRED,
MOVE DIP SWITCH SLIDER TO THE 15°F POSITION.
8. "ALARM OUTPUT" DIP SWITCH MUST BE SET TO "PULSE" IF BLINKING T-STAT SERVICE LIGHT IS DESIRED OR IF DDC
CONNECTION IS AVAILABLE. CONT FOR NON BLINKING THERMOSTAT CONNECTION.
9. DEFAULT SETTINGS FOR UPM BOARD FROM FACTORY SHOWN. ALSO SEE INSTALLATION MANUAL.
10. ALARM OUTPUT IS NORMALLY OPEN (NO) DRY CONTACT. IF 24 VAC IS NEEDED, CONNECT R FROM TERMINAL BLOCK TO
ALR-COM TERMINAL, 24VAC WILL BE SENSED ON THE ALR-OUT WHEN THE UNIT IS IN ALARM CONDITION. OUTPUT WILL
BE PULSED IF PULSE IS SELECTED.
11. REVERSING VALVE NOT PRESENT ON UNITS WITH STRAIGHT COOL.
12. REFER TO UNIT IOM FOR FACTORY DEFAULT MOTOR SPEED INSTALLATION SETTINGS AND AVAILABLE PROGRAMMED
SPEED PINS.
13. A2R WILL ONLY BE PRESENT WHEN OPTIONAL A2L SENSOR IS CONNECTED.
14. DUAL RESET PRIMARY CONTACTS WILL OPEN AT 145°F (+/-5°F) AND CLOSE AT 105°F (+/-9°F). BACK UP CONTACTS
WILL OPEN AT 185°F (+/-8°F). BACK-UP CONTACTS WILL NOT RESET IN AMBIENT TEMPERATURES ABOVE -31°F.
3
21
SEE MOTOR TERMINAL
CONNECTIONS BELOW
BM
ECM TERMINAL CONNECTIONS
N - L2
G - GROUND
L - L1
C - 24V COMMON
1-5 - SPEED TAPS
N
G
L
C
34
5
HIGH VOLTAGE
MOTOR CONNECTIONS
1
2
ECM TERMINAL CONNECTIONS
12
RD
BK BK
G_Out
G
C
OUT
COM
POWER
UNIT PROTECTION MODULE
STATUS
R
R
ALARM
FREEZE1
FREEZE2
COND
LPC
HPS
CC
LOCKOUT 4 2
RESET R Y
ALARM CONT PULSE
TEST YES NO
FREEZE1 15F 25F
FREEZE2 15F 25F
PUMP YES NO
GND
TO
DDC
OR
THERMOSTAT
CS
FS2
FS1
VT
CC
CMR
BN
BL
BN
BK
WT
GN/YL
A2L
Y
HPS
HPS
YL
LPS
HSL
BN
SEE NOTES 5 - 10
11
BL
OR
OR
BL
YL
YL
RD
GN
BL
BL
GN
RD
RD
YL
YL
RD
BK
BK
WT
BL
GN
RD
BK
GN/YL
BL
USE CLASS II FIELD WIRING
HLS1
HE1
HCHC
RD
BK
BK
RD
HC
W
WT
BL
EHR
3
9
EHR
2
8
EHR
WT
example. Always refer to the wiring diagram attached to the unit.
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