Watlow QPAC-01 - How to Install and Wire the QPAC, Chapter 2

Starting Out
14
QPAC User's Manual
How to Install and Wire the QPAC, Chapter 2
Circuit
Breakers
or
Disconnects
Contactors
If Required
Onboard,
factory
installed
semicon-
ductor
fuses
QPAC-01 50A
Heater
Load
L1 T2
T1
L2
Circuit
Breakers
or
Disconnects
Contactors
If Required
Onboard,
factory
installed
semicon-
ductor
fuses
QPAC-01 30A
Heater
Load
L1 T2
T1
L2
Figure 16 -
QPAC-01 Wiring
for 50A Units
Figure 15 -
QPAC-01 Wiring
for 30A Units
ç
CAUTION:
Check terminals for tightness before applying power and then recheck terminals
after one day of operation. Loose connections can damage the SCR.
QPAC-01 Power and Load Wiring
Wire QPAC-01
∫
WARNING:
To avoid potential
electric shock and
other hazards, all
mounting and wiring
for the QPAC must
conform to the
National Electric
Code (NEC) and
other locally appli-
cable codes.
① NOTE:
On 120Vac or
277Vac, L2 is neutral
and cannot be
broken.
② NOTE:
A contactor is
required if a high
limit control is used.
∫
①
②
①
②