Programming Guide

VAV-SVP01A-EN 111
Troubleshooting
Figure 63. SCR/PSC fan-powered with single phase voltage electric heat
T
B
3
_
3
1ST STAGE
2ND STAGE
CONTACTOR
CONTACTOR
T
B
3
_
2
T
B
4
_
1
T
B
4
_
2
COMMUNICATIONS
FIELD INSTALLED
T
B
2
_
1
T
B
2
_
2
TWISTED PAIR
WIRING
T
B
2
_
5
T
B
2
_
3
T
B
2
_
4
T
B
2
_
6
T
B
3
_
1
T
B
1
_
1
T
B
1
_
2
T
r
a
c
e
r
V
V
5
5
0
Y
B
L
ACTUATOR
J
1
0
J
8
B
R
J
9
O
R
J
1
1
V
H
O
T
H
O
T
C
L
O
S
E
O
P
E
N
CONTACTORS
MAGNETIC CONTACTORS (MAGN)
MERCURY CONTACTORS (MERC)
2
HEAT
STAGES
1
208
240
277
480
347
DAMPER
WIRING
ACTUATOR
SINGLE PHASE
LINE VOLTAGES
TRANSFORMER
SPEED
BLOCK
TERMINAL
CONTROL
R
T
B
3
_
6
T
B
3
_
5
CONTROL BOX
F
L
O
W
VV550
G
BK
VOUT
-
PRESSURE
TRANSDUCER
BK
DISCONNECT
+
OPTIONAL
FUSE
BK
R
1
2
3
4
SWITCH
RELAY
MOTOR
BK
BK
BR
BK
W
W
CONTROL BOX
VV550
BL
2
4
V
Y
BR
W
MOTOR
W W
L1 L2 N - 208, 240, 480
L1 N - 277, 347
OPTIONAL
DISCONNECT
SWITCH
HEATER TERMINAL BOX
AUTO RESET
CUTOUT
THERMAL
Y
Y
V
O
OPTIONAL
AIR FLOW
SWITCH
B
R
B
K
TO FAN
MOTOR
W
L1
L2
CUTOUT
MANUAL
OPTIONAL
(SEE NAMEPLATE)
LINE VOLTAGE
FUSE
L1
L1
N
G
N
L2
G
NL2
OPTIONAL FIELD
INSTALLED ZONE SENSOR
ZONE SENSOR
REMOTE MTD.
W/ COMM. JACK
2 1
TB2-5
TB2-6
1(-)2(+)
3
TB3-2
TB3-3
TB3-1
VV550 BOARD
INSTALLED
WIRELESS
24VAC
T
B
1
-
1
T
B
1
-
2
GND
24V
BL
Y
Y
BL
OPTIONAL
FACTORY
TB2-5
TB3-3
W/ COMM. JACK
DIGITAL DISPLAY ZONE SENSOR
REMOT E MTD .
OPTIONAL FIELD INST ALLED
DIGITAL DISPLAY ZONE SENSOR
7 136 2
TB3-2
TB3-1
TB1-1
TB1-2
11 10
TB2-6
HEATER TERMINALS - TYPICAL OF SINGLE PHASE VOLTAGES
FAN-POWERED UNITS - VV550