INSTALLATION, OPERATING AND
MAINTENANCE INSTRUCTIONS FOR
UNIT HEATERS
“Series OWD”
INSTALLATION
1.
Caution:
This equipment should be installed by
qualified personnel only.
MECHANICAL INSTALLATION
2. Install the heater at least 6 feet (1.80m) from the floor
and 8” (203 mm) from the wall or ceiling.
3. Install the heater to a wall or ceiling as shown on the
reverse side.
4. If louvered grille is furnished with the unit, it can be
installed with louvers deflecting the air up, down or
sideways.
ELECTRICAL INSTALLATION
5. Follow the wiring diagram on the inside of the control
enclosure.
6. Supply connections must be made with copper wiring
rated for at least 90
°
C (194
°
F), with terminal fittings
rated for the application.
7. If supply connections are for 250 volts or greater, all
wiring must be insulated for 600 volts.
8. All supply connections must be made according to
applicable regulations.
9. Supply conductors must be sized for at least 125% of
the rated load, as shown on the nameplate, calculated
as follows:
Kilowatts per set of terminals x 1250
Single Phase Units =
Voltage
Kilowatts per set of terminals x 1250
Three Phase Units =
Voltage x 1.73
Each set of terminals carries an equal KW load unless
otherwise noted on the wiring diagram.
10. If not built in, install a line disconnect switch or main
circuit breaker in accordance with local and national
codes.
11. All electrical connections in the heaters, including both
field and factory-made connections, should be checked
for tightness before operating the heater. In addition,
after a short period of operation, all connections should
again be check for tightness.
OPERATING AND MAINTENANCE
12. All source of power must be disconnected before
working on this equipment. To avoid injury and electric
shock, do not perform any service other than that which
is contained in the Operating & Maintenance
Instructions.
13. Maximum ambient temperature in which the heater can
be operated is 79
°
F (26
°
C).
14. To operate the heater, make sure all enclosure covers
are closed securely, and all associated control
equipment is on; energize main supply disconnect; if a
thermostat is controlling the heater, set it above the
ambient temperature. If the heater is provided with a
selector switch, it must be in the ON position.
15. When the heater is equipped with a built-in time delay
relay, the fan will remain in operation for about a minute
to cool the elements after the heater is switched off
either by the thermostat or the selector switch. Do not
turn heater off at main disconnect switch, as this
prevents the fan from cooling the elements.
16. During normal operation, the limit controls are not
supposed to cycle the heater ON and OFF. If frequent
tripping of the limit controls occurs, check to see if the
inlet or the outlet of the heater is blocked in some way.
If no obstruction is visible, the heater has to be
examined by qualified service personnel before further
operation to determine the cause of nuisance tripping.
17. The heater can be washed down with water, only if the
nameplate on the heater shows that it is rated “Wash
Down.”
18. At least once at each year, check all electrical
connections, enclosure cover screws and fan blade
screws for tightness.
Keep these instructions
for future reference.
180, 3e avenue – PO Box 188, L’Islet, Qc, G0R 2C0
Tel: (418) 247-3947 or 1-800-463-7043, FAX: 418-247-7801
(16 pagine)
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