Wiring Diagrams - Chromalox DRA Series Installation And Operation Instructions Manual

Wiring Diagrams

Diag. 1 – FACTORY WIRED 3 PHASE
Cord by others. Type "SO" or equal
sized to meet nameplate
requirements
L3
T3
L2
T2
L1
T1
Thermostat
1
3
4 6
Cutout
Diag. 2 – FACTORY WIRED 3 PHASE
Cord by others. Type "SO" or equal
sized to meet nameplate
requirements
Contactor
L3
T3
L2
T2
L1
T1
Thermostat
3
1
4
Diag. 4 – FACTORY WIRED 3 PHASE
Cord by others.
Type "SO" or equal
sized to meet nameplate
requirements
Contactor
L3
T3
L2
T2
L1
T1
Thermostat
1 3
6
4
6
5
3
2
1
1
4
3
2
4
Red
Blk
Blu
Motor
Wht
5
To T2 5
3
To T3 4
1
3
1
3
To T3
5
1
6
2
6
4
2
To T1
To T1 To T2
2
4
6
Fan Relay
Black
L1 T1
Motor
L2 T2 White
A1 A2
Blk/Red or Grey
Blk
Cutout
6
Wht XFMR
Blk
Diag. 3 – FACTORY WIRED 3 PHASE
Cord by others.
Type "SO" or equal
sized to meet nameplate
requirements
Contactor
L3
T3
L2
T2
L1
T1
Thermostat
1
12
11
9
8
7
To T3 To T2
3 4
4
11
8
3
7
10 1 5
9
10
2 6
5 6
1 2 To T2 To T1
To T3 To T1
Fan Relay
L1 T1 Black
Motor
L2 T2 White
A1 A2
Blk/Red or Grey
Blk
Cutout
Wht XFMR
Blk
Diag. 1a – FIELD CONVERSION TO 1 PHASE
Cord by others. Type "SO" or equal
sized to meet nameplate
requirements
6
Front of
5
Heater
L2
L1
All control wiring
same as Diag. 1
Instructions:
1. Loosen screws on load side of contactor. Remove all lead wire.
2. Insert lead wires numbers 1, 3, and 5 into box lug connector "T1". Tighten screws
on box lug connector.
3. Insert lead wires numbers 2, 4, and 6 into box lug connector "T2". Tighten screws
on box lug connector.
4. Examine wiring to make certain it is per above diagram.
Diag. 2a – FIELD CONVERSION TO 1 PHASE
Cord by others. Type "SO" or equal
sized to meet nameplate
requirements
Front of
Heater
L2
L1
All control wiring
same as Diag. 2
Instructions:
1. Loosen screws on load side of contactor. Remove all lead wire.
2. Insert lead wires numbers 1, 3, and 5 into box lug connector "T1".
Tighten screws on box lug connector.
3. Insert lead wires numbers 2, 4, and 6 into box lug connector "T2".
Tighten screws on box lug connector.
4. Examine wiring to make certain it is per above diagram.
12
11
9
8
7
To T3 To T2
3 4
4
3
5
10 1
2
5
1 2
To T2 To T1
To T3 To T1
3
Red
4 6
Black
Blue Motor
Cutout
White
Diag. 4a – FIELD CONVERSION TO 1 PHASE
Cord by others.
Type "SO" or equal
sized to meet nameplate
requirements
12
Front of Contactor
Heater
L2
L1
All control wiring
same as Diag. 4
Instructions:
1. Loosen screws on load side of contactor. Remove all lead wire.
2. Insert lead wires numbers 1, 3, 5, 7, 9 and 11 into box lug connector "T1".
Tighten screws on box lug connector.
3. Insert lead wires numbers 2, 4, 6, 8, 10 and 12 into box lug connector "T2".
Tighten screws on box lug connector.
4. Examine wiring to make certain it is per above diagram.
7
6
5
2
T2
4
T1
1
3
6
4
Contactor
2
All even numbered wires to T2
T2
All odd numbered wires to T1
T1
1
3
5
12
Front of
8 11
Heater
7
9
10
6
6
12
10
8
6
4
2
All even numbered wires to T2
4
T2
3
T1
All odd numbered wires to T1
1
1 5
2
6
3
5
7
9
11
2
6
Front of
5
1
Heater
3
4
4
3
Front of
Heater
5
1
2
6
12
Front of
8
11
Heater
7
9
10