8
HEATER
PLUG
WIRE
TIES
A05385
Fig. 9 -- Power Connection to Heater
Single Point Electrical Connection
NOTE
: All electrical connections, wire sizes and type of conduit
shall meet the National Electric Code (NEC) and state and local
codes (or International Electric Code) as applicable.
NOTE
: Use minimum 75
_
C copper wire only.
1. Make sure all disconnects are still open and tagged out as
required previously.
2. Mark the main unit nameplate with an “X” for the electric
heater size being installed. Refer to the electrical data
marked with an “X” on the nameplate for wire and
maximum over current protection sizing.
3. Connect low voltage wires as shown in unit schematic
diagrams found on the base unit installation instructions.
There connections must be made in the 24v barrier section
inside the unit panel (See Fig. 10 or Fig. 11).
4. Insert field power line through the Electrical Panel hole (see
Fig. 10 or Fig. 11) and connect to electric heater as shown
in their respective wiring diagram. Electrical heaters with
factory installed circuit breakers must have their field lines
connected to the breaker block lugs and electric heater
without factory installed circuit breakers must have their
field lines connected to the heater leads using wire nuts.
Ground electrical equipment in the appropriate locations.
IMPORTANT
: Heaters with factory installed circuit breakers may
be installed on a branch circuit protected by either a fuse or circuit
breaker. For all other heaters, the branch circuit must be protected
by a fuse or circuit breaker supplied by others.
5. Connect black and yellow stripped wires from heater to the
unit compressor contactor leads using supplied wire nuts
according to their heater wiring diagram.
NOTE
: Dress wires with wire ties provided. Separate all wires
from incoming power leads.
6. Close control box access panel.
Dual Point Heater Installation
NOTE
:
Complete single point heater installation procedures
before completing the following steps.
1. Open all electrical disconnects and install lockout tag before
beginning any installation or service work.
2. Remove Control Box Access Panel (see Fig. 1), check for
clearance on the inside of control box, and remove a 7/8--in
knockout hole on the Electrical Panel for second power line.
3. Attach warning and rating labels in the selected location
(see Fig. 1).
4. Mark the main unit nameplate with an “X” next to the
accessory heater “none”. Mark the dual point rating label
installed at step 3 with an “X” for the electrical heater size
being installed. Refer to the electrical data marked with an
“X” on each nameplate for wire and maximum over current
protection sizing.
5. Remove unit power wiring line connection from heater to
unit contactor and compressor leads a s shown in heater
wiring diagram. these are the stripped end wires black and
yellow, with opened ends.
Dual Point Electrical Connection
NOTE
: All electrical connections, wire sizes and type of conduit
shall meet the national Electric Code (NEC) and state and local
codes (or International Electric Code) as applicable.
NOTE
: Use a minimum 75
_
C copper wire only.
1. Make sure all disconnects are still open and tagged out as
required previously.
2. Connect low voltage wires as shown in unit schematic
diagrams found on base unit installation instructions. These
connections must be made in the 24v barrier section inside
the unit panel (see Fig. 12 or Fig. 13).
3. Insert first field power line through the Electrical Panel
bottom hole (see Fig. 12 or Fig. 13) and connect to electric
heater as shown in their respective wiring diagram found on
the heater accessory kit. Electrical heaters with factory
installed circuit breakers must have their field lines
connected to the breaker block lugs and electric heater
without factory installed circuit breakers must have their
field lines connected to the heater leads using wire nuts.
Ground electrical equipment in the appropriate locations.
IMPORTANT
: Heaters with factory installed circuit breakers may
be installed on a branch circuit protected by either a fuse or circuit
breaker. For all other heaters, the branch circuit must be protected
by a fuse or circuit breaker supplied by others.
CPHEA
T
ER
