Installation manual
A1
M1
M2
K1
RELAY
K2
RELAY
K5
RELAY
FAN
MOTOR
DAMPER
MOTOR
NEUTRAL
MED
NC
HIGH
LOW
J1 6
J1 3
J1 4
J1 9
K4
RELAY
J3 1
J3 2
FURNACE BLOWER INTERLOCK
CLASS 2 CIRCUIT ONLY
ELECTRONIC ASSEMBLY
S1
120V 60Hz
FROM MAIN
J1 2
J1 1
J1 8
VE0018A
17
7.
Wiring Diagram
BK
G
R
Y
R
BK
Y
NOTE 4
WALL CONTROL
WALL CONTROL
WALL CONTROL
WALL CONTROL
OVERRIDE SWITCH
OVERRIDE SWITCH
OVERRIDE LED
FURNACE BLOWER
INTERLOCK
NOTES 1, 5
NOTE 5
OPTIONAL
NOTES 5, 6
OPTIONAL
M1
X2 M2
1
2
1
123
12
4
7
6
9
3
456789
2
3
1
2
3
NEUTRAL
LOW
HIGH
MEDIUM
FAN MOTOR
X1
GY
O
G
R
BL
GY
O
G
NC
R
(NOTE 2)
BN
BN
C1
BL
BL
G
DAMPER MOTOR
MAIN EARTHING
POINT
R
O
GY
W
G
T1
R1
A1
DEFROST
TEMPERATURE
SENSOR
JU1
J4
J1
J3
ABCDEFG
FF IOCOLYRGB
ELECTRONIC ASSEMBLY
BL
BL
G
BL
BL
COM
120V 60 Hz
W1
G
BK
W
NEMA-15P
5-15 PLUG
BK
DOOR INTERLOCK
SWITCH S1
NO
NEUTRAL
LINE
BK
VE0017A
Models: 90H Novo+ & 190H Novo+
NOTES
1- Controls available. See Section 6 (Low voltage only, 12VDC).
2- The factory set wiring for blower speed selection is high
and low. Medium speed can be selected instead of low
speed. Disconnect the RED wire from the motor RED tap
and connect it to the motor BLUE tap.
3- If any of the original wire, as supplied, must be replaced,
use the same or equivalent wire.
4- Use the factory supplied protective tubing.
5- The field wiring must comply with applicable codes,
ordinnances and regulations.
6- The furnace fan circuit must be class 2 circuit only.
LINE VOLTAGE
LOW VOLTAGE
AND FIELD WIRE
COLOR CODE
BK BLACK NC NO CONNECTION
BL BLUE O ORANGE
BN BROWN R RED
G GREEN W WHITE
GY GREY Y YELLOW
FUNCTION TABLE RELAY
MODE K1 K2 K4* K5
Intermittent 0001
Exchange Low 1010
Exchange High 1110
Circulation Low 1011
Circulation High 1111
Defrost Cycle 1111
Off 0001
0 = Relay coil is de-energized
1 = Relay coil is energized
* On special mode, K4 is cycling 10 min. ON and 20 min. OFF
Connection
Logic
WARNING
Risk of electrical shocks. Before performing any maintenance or servicing, always disconnect the
unit from its power source.
!
DEFROST TIME
JUMPERS TABLE DEFROST/VENTILATION
TYPE MINUTES
23°F 5°F -22°F
JU1A JU1B JU1C JU1D JU1E JU1F JU1G -5°C -15°C -27°C
IN OUT OUT OUT IN IN OUT
STANDARD MODE
6/60 6/32 6/20
IN OUT OUT OUT IN OUT OUT
EXTENDED
DEFROST
10/30 10/20 10/15
A B C D E F G
2
1
JU 1
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