Advertisement
NOTE: Dress wires with wire ties provided. Separate all wires
from incoming power leads.
4. Insert second field power line through the Electrical Panel
top hole (see Fig. 12 or Fig. 13) and connect to unit
contactor black and yellow leads using sire nuts. Ground
electrical equipment in the appropriate locations.
5. Separate all wires from incoming power leads.
6. Close electrical access panel.
START- - UP
CAUTION
!
ELECTRICAL SHOCK HAZARD
Failure to follow this caution may result in personal injury
or death.
Before proceeding, verify that all wiring is correct per
factory approved schematic. Notify equipment supplier
immediately of any discrepancies.
NOTE: Relay, Rectifier and Time Delay Boards
Each heater element is controlled by a 24VDC control relay. Each
control relay is energized by a small rectifier board attached
directly to relay coil terminals. When possible - - one rectifier board
is used to control a second relay.
The rectifier board converts incoming 24v AC control signal to
DC. Some heaters may have up to four relays. The second and/or
third relay rectifier board may also have a time delay feature and a
Fig. 10 - - Single Point Connections For Heaters With Circuit Breakers
small jumper wire built into it. With the jumper uncut, the time
delay is approximately 5 sec after the initial first stage. When
jumper is cut at factory, this provides an 8 sec delay.
1. Refer to base unit installation instructions as required.
2. Check for loose terminal connections.
3. Check that all fuse and circuit breaker short circuit
interrupting ratings are adequate.
4. Turn on unit and heater power.
5. Set thermostat to call for heat.
6. Check operation of heater.
7. Check that airflow across the heater is at or above the
minimum recommended CFM requirement (See Table 2).
8. Use of accessory electric heaters that are not tested and
approved by the original equipment manufacturer of the
packaged air conditioner or heat pump is not recommended
and will not be warranted by the original equipment manu-
facturer. Additionally, damage caused by such heaters to the
equipment will not be covered under warranty by the
original equipment manufacturer.
TROUBLESHOOTING
1. Circuit Breakers- -Malfunction will interrupt power to the
unit. Check for cause of failure, reset or replace.
2. Limit Switch- -Malfunction prevents heating element(s) from
being energized. Replace switch if malfunction occurs.
3. Relay- -Malfunction will not allow heater to energize.
Replace faulty relay. Do not attempt to repair.
POWER LINE
TO HEATER
24V FIELD
WIRING BOX
9
A10381
Advertisement
