2
1
3 4 5 6
7
8
6 5 4 3
2
1
3 4 5 6
10V
2V
OFF
OFF
T
V
ANALOG INPUTS
BINARY
INPUTS
SEE NO
TE 6
P5
P6
Z BUS
TO
ZONE
STAT
JOHNSON CONTROLS, INC.
METASYS
MODEL AS-UNT110-1
(10 VA POWER REQUIREMENT)
2 1
ON
MA
SEE NOTE 4
(BETWEEN THE ELECTRIC PRE-
HEAT AND EVAPORATOR COILS)
SEE NOTE 5
AI COM
AI COM
AI COM
AI COM
AI COM
AI COM
15 VDC
24 V
A
C
24 V
A
C
24 V
A
C
24 V
A
C
AI 1
AI 2
AI 3
AI 4
AI 5
AI 6
15 VDC
B11
B12
B13
B14
24 V
A
C
COM
REF
N2
–
N2+
ZB
US
HS
OT
DA
AF
(SET @ 0.25")
(ON THE RETURN AIR DUCT FLANGE
UPSTREAM OF THE AIR DAMPERS)
(IN THE DISCHARGE AIR DUCTWORK)
(IN THE DISCHARGE AIR DUCTWORK)
OUT
COM
POWER
TEMP
TEMP
RED
YELLOW
BINARY OUTPUTS
24 V
A
C
24 V
A
C
TRIA
CS
COMMON
COMMON
COMMON
COMMON
COMMON
BO 1
BO 2
BO 3
BO 4
BO 5
BO 6
BO 7
BO 8
TERMINAL
STRIP
1
2
E
Y1
Y2
R
G
C1
H
L
O
C2
YELLOW
BLUE
BLUE
PINK
PINK/BLACK STRIPE
ORANGE
PURPLE
BLACK
PINK/BLACK STRIPE
RV
208/230 OR
460 VOLTS
60 HERTZ
3 PHASE
SEE NOTE 2
L3
L2
L1
50 VA
TRANSFORMER
24 VAC
BLA
CK
SEE NO
TES
1, 8 & 11
YELLO
W
BLUE
#
5R
2
4
3
1
5
12
U-5 IOM
Figure 9. 100% outside air unit with Johnson Metasys controls and hot water preheat wiring diagram
NOTES:
1. All units are factory-wired to customer order.
For 208 volt units, use the black and red transformer leads.
For 230 volt units, use the black and orange transformer leads.
For 460 volt units, use the black and black/red strip transformer leads.
2. Supply wiring must have copper conductors.
3. An external manual reset overload is used on all 5 HP blower motors. All other blower motors have auto reset overloads.
4. Both the HS and OT sensors are contained within one device.
5. JCI Metasys UNT110-1 uses a factory installed program.
6. This factory wired jumper between terminals BI1 and 24 VAC indicates occupied status.
7. The optional “Water Temperature Switch” (WT) is also included in the optional “Low Temperature Package” (TL).
8. Both transformers must be phased identically: L1 is always the transformer’s black lead.
9. Johnson Controls, Inc. supplied jumper wire. Remove this jumper wire only if using a separate load transformer (by others).
10. The “Low Temperature Cutout” switch (P/N 71042410) is factory set at 33 F. Its bulb is positioned across the discharge side of the preheat coil.
11. Insulate all unused wire ends.
