103904-UIM-B-0505
Unitary Products Group
7
FIGURE 9: Control Box
CFM
SELECTION
BOARD
TRANSFORMER
THERMOSTAT
WIRING
CONNECTIONS
FIGURE 10: Control Board
R
Y
G
W2
W1
O
C
2
4
V
A
C
BREAK TAB FOR
VARIABLE SPEED MOTOR
L
2
F
A
N
L
1
L
2
L
1
L2
H
L
L
1
2
3
4
K2
T9A
K1
T9A
5
A
M
P
M
A
X
2
SPEED
L
TRIP
ECM
FAN
&
LIM
PWR
LIM
&
HEAT
COM
TEST
HEAT 2
DRV
HEAT 4
DRV
HEAT 3
DRV
FAN RELAY
FAN CONNECTIONS
TRANSFORMER
CONNECTIONS
(HIGH VOLTAGE)
4-PIN POWER
CONNECTOR
1 STAGE
HEAT RELAY
24 VOLT R
5 AMP
CONTROL
VOLTAGE
FUSE
6-PIN CONNECTOR
(LIMIT, 2ND, 3RD
& 4TH HEAT RELAY
DRIVER)
24 VOLT
COMMON
FIGURE 11: Line Power
ELECTRIC HEAT
WITHOUT CIRCUIT BREAKER
SINGLE SOURCE (2.5 - 10 KW)
ELECTRIC HEAT
WITHOUT CIRCUIT BREAKER
3 PHASE (10 - 15 KW)
1 PHASE ELECTRIC HEAT
WITH CIRCUIT BREAKER
AS SHIPPED FROM FACTORY
SINGLE SOURCE (2.5 - 25 KW) - 25 KW SHOWN
1 PHASE ELECTRIC HEAT
WITH CIRCUIT BREAKER
& BREAKER BAR REMOVED
MULTI-SOURCE (15 - 25 KW) - 25 KW SHOWN
TYPICAL WIRING WITHOUT
ELECTRIC HEAT
GND.
LUG
POWER
SUPPLY
GND.
LUG
GND.
LUG
POWER
SUPPLY
GND.
LUG
GND.
LUG
POWER
SUPPLY 1
GND.
LUG
GND.
LUG
POWER
SUPPLY
GND.
LUG
POWER
SUPPLY 2
POWER
SUPPLY 3
GND.
LUG
POWER
SUPPLY
GND.
LUG
POWER WIRING (208/230-1-60)
NOTE: USE ONLY COPPER CONDUCTORS
POWER CONNECTIONS
L1
L2
L3
L1
L2
L3
TABLE 3: Physical and Electrical Data
MODEL N1VS
1
B12
D12
C16
D20
06
06
06
06
Blower - Diameter x Width
10 x 8
11 x 10
11 x 10
11 x 10
Motor
HP
1/2
1/2
3/4
1
Nominal RPM
1200
Voltage 208/230
208/230
208/230
208/230
Amps
Full Load
5.0/4.3
5.0/4.3
6.1/5.5
7.8/7.0
Locked Rotor
-
-
-
-
Shipping / Operating Weight (lbs.)
66/60
86/80
73/67
91/85
1. All tables refer to models with and without an “X” suffix.
TABLE 4: Conversion Table
KW & MBH CONVERSIONS - FOR TOTAL POWER INPUT REQUIREMENT
FOR
208V
OPERATION MULTIPLY
240V
TABULATED KW & MBH BY
.751
230V
240V
.918
