Heater Wiring Schematics - Graco B Series Instructions-Parts List Manual

Troubleshooting –

Heater Wiring Schematics

NOTE: Heater No. 235–840 is shown in Fig. 10. The
wiring for Heater No. 235–839 is identical except the
second set of elements (wires 9, 10, 19, 20) are not
used.
RESIN HEATER
OPTIONAL ATC
+ +
P1
OPTIONAL
ISO HEATER
OPTIONAL ATC
+ +
P1
OPTIONAL
Fig. 10
Electrical Resistance Checks
LAMP
BOARD
–
–
T1
+
TRIAC
+
B
C
MT1
A
MT2
G
J2
CAL
J1
+ +
P1
P2
STANDARD
CONNECTOR
LAMP
TRIAC
B
C
MT1
A
MT2
G
J2
J1
+ +
P1
P2
STANDARD
CONNECTOR
2
1
A
11
12
D
B
C
7
BLK
4
BLK
3
WHT
2
WHT
1
M+
M–
TEMP DIAL
A
B
N.T.C
SENSOR
PROBE
3
A
21
BOARD
22
D
B
C
BLK
4
–
BLK
– 3
WHT
T1
+ 2
WHT
+ 1
M+
M– TEMP DIAL
CAL
A
B
N.T.C
SENSO
R
PROBE
POWER IN
TERMINAL BLOCK (TB)
1
2
3
A
4
5
6
B
CIRCUIT BREAKER
9
8
10
ELEMENTS
LIMIT
THERMOSTAT
POWER IN
TERMINAL BLOCK (TB)
1
2
4
3
A
4
5
6
B
CIRCUIT BREAKER
19
18
20
ELEMENTS
LIMIT
THERMOSTAT