Winco ASCO 300 Accessory 44 Strip Heater - Manual

381339–211 E
ASCO POWER TECHNOLOGIES L.P. 50 Hanover Road, Florham Park, New Jersey 07932 USA www.asco.com
Automatic Transfer Switches
for Accessory 44
Strip Heater
Accessory 44 Strip Heater is designed to keep humidity
and/or temperature within the ATS enclosure at acceptable
levels. This accessory consists of a mounting bracket with
strip heater, thermostat, and terminal block. A transformer
with fuses is included when the power for the assembly is
derived from the ATS. The 120 V ac customer powered
assembly does not include a transformer. This accessory is
available factory installed or in kit form. If already installed,
turn the thermostat’s dial to required setting.
DANGER: De–energize all power to the
Transfer Switch before opening the enclosure.
Hazardous voltage capable of causing shock,
burns, or death is used in this switch.
Mounting
1. After de–energizing both Normal and Emergency
power sources and the Load, open the enclosure door.
Carefully use a voltmeter to verify that all power is
de–energized at the Transfer Switch power terminals
2. Hole Drilling Data Sheets are shown in this publication.
They are not drilling templates. They specify the
locations and sizes of the strip heater assembly
mounting holes for each ampere rating size ATS. Drill
two holes into the enclosure as indicated.
CAUTION: Protect the Transfer Switch from
metal chips when drilling the holes. Clean up all
debris inside the enclosure after drilling.
3. Use the hardware supplied in the kit to mount the
bracket to the inside of the enclosure. The thermostat
should face the front of the enclosure after mounting the
assembly.
dial
turn counterclockwise
to lower temperature
turn clockwise
to raise temperature
thermostat
thermostat
heater
transformer
with fuses
mounting
holes
DANGER: De–energize the conductors
before making any connections. Open the
Normal and Emergency source circuit breakers
and be sure that the load is also de–energized.
Wiring
1. A Mounting Data drawing is included on the back page.
Select the appropriate wiring diagram and illustration
according to Transfer Switch ampere rating size. If 120 V
ac customer–furnished power will be used, go to step 2. If
power will be from the Transfer Switch go to step 3.
2. 120 V ac customer–furnished power. Run the 120 V ac
line into the enclosure and connect the wires to TB
terminals TB–1 and TB–2 on the strip heater assembly.
3. Transfer Switch derived power. A two–wire harness is
provided in the kit. Select the appropriate illustration on
the Mounting Data diagram (back page) according to
Transfer Switch ampere rating size. Follow it to connect
the harness to the Transfer Switch and to the strip heater
assembly. Connect one wire from transfer switch Load
terminal LA to the strip heater assembly’s fuse block
terminal HI; connect the other wire from Load terminal
LC to terminal HF on the fuse block. Double check all
wiring before continuing.
4. Turn the thermostat’s dial to desired setting. Then
close the enclosure door.
5. After the door is closed, reenergize the ATS (close
Normal and Emergency source circuit breakers and
reenergize the load). If a separate 120 V ac line was
used for the accessory, energize that line.