Multizone output wiring, Figure 3.5d, Figure 3.5e – Watlow Power Series Rev H User Manual
Page 17: Fan wiring for 250a models
L2
L1
L3
4
5
6
Limit Control
Contacts
(If Required)
Heater
2
Gnd
1
3
4
5
6
On-board
Semiconductor Fuses
Figure 3.5a – 3-Phase, 3-Leg,
6-SCR Output Wiring for
4-Wire Wye Application
(Model PC4X-XXXX-XXXX)
Figure 3.5b – 3-Phase, 3-Leg,
6-SCR Inside Delta
Figure 3.5c – 3 Phase, 3-Leg,
6-SCR Output Wiring
(Model PC3X-XXXX-XXXX)
L2
L1
L3
Limit Control
Contacts
(If Required)
Gnd
On-board
Semiconductor
Fuses
ref.1
ref. 2
ref. 3
PC9
2
1
3
4
5
6
N
Limit Control
Contacts
(If Required)
L2
L1
L3
2
Gnd
1
3
4
5
6
On-board
Semiconductor
Fuses
ref.1
ref. 2
ref. 3
W i r i n g , C h a p t e r 3
Wa t l o w P o w e r S e r i e s
I
3 . 5
ç∫
WARNING:
To avoid damage to
property and equipment,
and/or injury or loss of
life, use National Electric
Code (NEC) standard
wiring practices to install
and operate the Power
Series. Failure to do so
could result in damage,
and/or injury or death.
ç
WARNING:
Install high or low
temperature limit control
protection in systems
where an over
temperature fault
condition could present a
fire hazard or other
hazard. Failure to install
temperature limit control
protection where a
potential hazard exists
could result in damage to
equipment, property and
injury to personnel.
NOTE:
For reference
connections 1 to 3, use
QC 0.250 in. wide and
0.032 in. thick
compatible connection
which is fully insulated
with nylon and has a
metal grip ring.
For 14-16 AWG:
Molex/ETC AA-5261; 3M
MNG14-250DFIX C-54-
503X or equivalent.
**NOTE: Models PC8 and PC9 control legs are isolated so that they may be wired from phase-to-phase inside delta or
phase-to-neutral, independent of how the other legs are wired.
çCAUTION: Do not connect ref.
connections with PC3 models. Failure
to follow this guideline could cause
damage to the Power Series.
Note:
Wiring must
be A, B, C
rotation.
Note:
Wiring must be A,
B, C rotation if phase
control is selected.
Limit Control
Contacts
(if required)
L1
L2
Gnd
1
3
4
6
PC8
On-board
Semi-
conductor
Fuses
2 Independent,
Single-phase Heaters
heater 2
ref.1
ref. 3
heater 1
Limit Control
Contacts
(if required)
L2
L1
L3
Gnd
1
3
4
6
PC8
On-board
Semi-
conductor
Fuses
2 Independent,
Single-phase Heaters
heater 2
ref.1
ref. 3
heater 1
Figure 3.5d –
**
Multizone Output Wiring
Figure 3.5e –
Fan Wiring for 250A Models
Note: 1. Phasing must be as shown.
2. Do not connect Ref. terminals.
Gnd
On-board
Semi-
conductor
Fuses
2
1
3
PC9
4
5
6
ref.1
ref. 2
ref. 3
heater
1
heater
3
heater
2
3 Independent,
Single-phase Heaters
Limit Control
Contacts
(if required)
L1
L2
Limit Control
Contacts
(if required)
L2
L1
L3
Gnd
On-board
Semi-
conductor
Fuses
2
1
3
PC9
4
5
6
ref.1
ref. 2
ref. 3
heater
1
heater
3
heater
2
3 Independent,
Single-phase Heaters
PC8X-XXXX-XXX1
PC8X-XXXX-XXX3
PC9X-XXXX-XXX1
PC9X-XXXX-XXX3
Molex/ETC AA-5261; 3M
MNG14-250DFIX
C-54-503X or equivalent.
Note:
Wiring must be A,
B, C rotation if phase
control is selected.