Output wiring – Watlow QPAC User Manual
Page 13
QPAC User's Guide
13
Chapter 2: Install & Wire
Output Wiring
*1 NOTE: A contactor is
required if a high limit
control is used.
*2 NOTE: A separate
disconnect is required
for the fan(s) if used.
QPAC-33 Power and Load
Wiring for all Units.
Circuit
Breakers
or
Disconnects
Contactors
If Required
3 factory-
supplied
semiconductor
fuses
Heater
Load
Fan 120VÅ (ac)/20W
L1
L2
L1
L2
L3
L1
T1
L2
T2
L3
T3
Hybrid
*1
*2
G
∫
WARNING: Shock Hazard
Heatsinks are electrically
Live.
ç
CAUTION:
Check terminals for
tightness before ap-
plying power and then
recheck terminals after
one day of operation.
Loose connections can
damage the SCR.
NOTE:
A circuit breaker is re-
quired in addition to the
semiconductor fuses.
All semiconductor fuses
are mounted on-board
the QPAC models 400 to
1,000. Where third-leg
fusing is selected, addi-
tional space is required.
NOTE:
QPAC models Q01, Q32
and Q33 up to 300A and
575V
Å
(ac) are agency
listed. QPAC models Q01
and Q32 up to 1,000A
and 480V
Å
(ac) are
agency listed. Q33 400
to 1,000A are not agency
listed.
∫
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 QPAC.
Failure to do so could
result in damage and/or
injury or death.