Technical Guide
718444-YTG-E-0613
76 Johnson Controls Unitary Products
Typical DNQ036-048 Cooling Unit with Single Stage Gas Heat 208/230-3-60 volt Wiring Diagram
LEGEND
ALS AUXILARY LIMIT SWITCH
CB1 CIRCUIT BREAKER
CFMCB CFM SELECTOR BOARD
COMPR COMPRESSOR
DM DRAFT MOTOR
EMCB ELEC. BLOWER MOTOR CTRL. BOARD
GND GROUND
HP HIGH PRESSURE SWITCH OPENS @ 625 PSIG
IDFAN INDOOR FAN MOTOR
IMCB INDOOR MOTOR CONTROL BOARD
LP LOW PRESSURE SWITCH OPENS @ 50 PSIG
LS LIMIT SWITCH
M1 CONTACTOR, COMPR. AND OD FAN
ODFAN OUTDOOR FAN MOTOR
PS PRESSURE SWITCH
RC2 OUTDOOR FAN RUN CAPACITOR
RS ROLLOUT SWITCH
T1 TRANSFORMER, 24V, 230V
TEMPERATURE CONTROLS - DNQ
UNIT SIZE DEVICE
OPERATING TEMPERATURE (DEG F)
OPEN +/- CLOSE +/-
3 TUBE
030-036
RS 270 12 --- ---
LS 160 6 130 9
ALS 160 12 --- ---
4 TUBE
036
RS 270 12 --- ---
LS 160 6 130 9
ALS 160 12 --- ---
3 TUBE
042-048
RS 200 12 --- ---
LS 150 6 120 9
ALS 160 12 --- ---
4 TUBE
042-048
RS 270 12 --- ---
LS 175 6 145 9
ALS 160 12 --- ---
5 TUBE
048
RS 270 12 --- ---
LS 160 6 130 9
ALS 160 12 --- ---
COOLING UNIT WITH GAS HEAT ELEMENTARY DIAGRAM
CAUTION - OPEN ALL DISCONNECTS
BEFORE SERVICING THIS UNIT
POWER SUPPLY 208/230-3-60
USE COPPER CONDUCTORS ONLY
205/R
228/BK
232/BL
227/BK
229/BL
HEAT/BK
COOL/BL
C2/BR
C1/BR
Y1/Y
R/R
Y2/O
BRN
PRP
121/BK
BLK
104/R
100/BK
107/PR
G/PR
231/BL
DELAY/R
ADJUST/PR
CFM OUT/Y-BK
CFM OUT/WT-BK
BLK
W-W1/W
221/BR
234/Y
225/PR
226/W
233/R
201/BR
215/R
244/PR
245/PR
236/O
RED
BLK
BLU
200/R
222/R
123/BL
126/Y
PRP
240V/BK
240V/PR
110/BK
NOTES:
1 ALL FIELD WIRING TO BE ACCOMPLISHED FOLLOWING CITY, LOCAL
AND/OR NATIONAL CODES IN EFFECT AT THE TIME OF INSTALLATION
OF THIS UNIT.
2. CAUTION: LABEL ALL WIRES PRIOR TO DISCONNECTION WHEN SERVICING
CONTROLS. WIRING ERRORS CAN CAUSE IMPROPER AND DANGEROUS
OPERATION. IF ANY OF THE WIRING, AS SUPPLIED WITH THE UNIT,
MUST BE REMOVED IT MUST BE REPLACED WITH TYPE 105 DEGREE C,
600 VOLT WIRE OR EQUIVALENT CLEARLY RENUMBERED FOR IDENTIFICATION.
VERIFY PROPER OPERATION AFTER SERVICING.
3. MOTORS ARE INHERENTLY PROTECTED.
4. FACTORY WIRED FOR 230 VOLT OPERATION. FOR 208 VOLT, MOVE107/PR
WIRE TO 208 VOLT TERMINAL ON T1.
5. REMOVED
6. SEE UNIT NAMEPLATE FOR MAXIMUM FUSE AND/OR CIRCUIT BREAKER SIZE
AND MINIMUM CIRCUIT AMPACITY.
224/R
248/O
RED
BLK
BLU
BLU-WHT/W2
CONTROL BOARD SETTINGS:
COMBUSTION BLOWER POSTPURGE: 30 SEC
INDOOR BLOWER HEAT ON DELAY: 30 SEC
INDOOR BLOWER COOL OFF DELAY: 30 SEC
INDOOR BLOWER HEAT OFF DELAY: FIELD SELECT
STRAIGHT LINE INDICATES SWITCH POSITION
180
120
90
60
CFM SELECTOR BOARD SETTINGS
COOLING: A - ARI RATED CFM
B -
C - SEE TECH LITERATURE
D - FOR ADDITIONAL INFORMATION
HEATING: A - NOMINAL HEATING CFM
B -
C - SEE TECH LITERATURE
D - FOR ADDITIONAL INFORMATION
ADJ: A - NOMINAL COOLING CFM
B - NOMINAL COOLING CFM X 110%
C - NOMINAL COOLING CFM X 90%
D - N/A
DELAY: A - STANDARD
B - HUMID CLIMATE
C - DRY CLIMATE
D - TEMPERATE CLIMATE
M
3
COMPR
C
S
R
P
W1
CFMCB
W2
G
C
Y1
Y/Y2
R
O
X/L
COMP
COND
M1
HP
LP
11
3
1
6
12
2
14
1
2
4
6
3
P9
P6
K2
K1
P4
P3
P2
5
13
15
A
B
C
D
COOL
HEAT
ADJ
DELAY
HEAT
PUMP
REMOVE
FOR
A
B
C
D
A
B
C
D
A
B
C
D
5
AB
HI COM LO
M1C
4
7
16
8
LP
RS
ALS
LS
PS
C
24V SEC
75VA
230V
T1
208V
PRI
M1
L1T1
M1
L2T2
M1AB
5
1
5
4
3
3
6
12
13
15
IMCBS4
S5
11
2
14
7
16
4
8
M
1
DM
M
1
IDFAN
11
5
3
1
6
12
2
14
P4
5
4
3
P5
11
5
3
1
6
12
14
P9
1
2
4
6
3
P6
GND
FIELD WIRING
OPTIONAL WIRING AND DEVICES
FACTORY WIRING AND DEVICES
RC2
13
15
13
15
M
1
ODFAN
BK
BR
PR
4
7
16
4
7
16
8
8
HIGH LIMIT INPUT
ROLLOUT SWITCH INPUT
POWER TO GAS RELAY
COIL
SW1
BLOWER
OFF DELAY
SELECT
60
90
120
180
FS
L1
H-IND
IND
HEAT
COOL
CONT
SPARK
TRANSFORMER
CONTINUOUS
POWER FOR
LOGIC
R
24VAC
Y
C
W1
W2
P1-8
P1-3
P1-5
G
C
JW6 PRESENT
WHEN HIGH
PRESSURE
SWITCH NOT
USED
P1-2
P1-1
P1-4
P1-7
K2
K4
JW6
P1-9
P1-6
PILOT
K7
K7
K5
K5
K6
K6
K3
FLAME SENSE
K1
EMCB
3
8
9
6
7
4
1
2
5
GAS_VALVE
P
M
C
5
CB1
3.2 AMP
M1
L3T3
ALT
GAS VALVE
PV
MV
PV/MV
855354-UWD-A-0412
HP