5
Figure 3. Installation of Circuit Breakers
For 25 kw & 30 kw Heater Kits: Attach the 4-Pin and
3-Pin Harnesses to the Auxiliary circuit board.
NOTE:
A wiring diagram and a rating label are supplied
with the electric heater kit. Affix the wiring diagram to the
blower housing.
• When installing the electric heater kit into a standard
air handler, affix the supplied rating label over the
electrical data section of the air handler unit data
label located on the lower access door.
• When installing the electric heater kit into a variable
speed air handler, the rating label supplied with the
kit will NOT be used. Check the appropriate block
on the air handler ratings label located on the lower
access door.
8. Install the circuit breaker bracket inside of the air handler.
Position the tab on the bottom of the bracket into the
slot of the control panel box. See Figure 2 (page 4) for
proper placement of bracket
9. Slide the bracket forward and align the screw holes
with the holes in the bottom of the control panel box.
Secure the bracket to the air handler with the supplied
screws.
Electric Heater Kits with Circuit Breakers
NOTE 1:
Circuit breakers supplied with the H6HK electric
heater kit are for short-circuit protection of the internal
wiring and to serve as a unit disconnect. They DO NOT
provide over-current protection of the supply wiring. Over-
current protection of the supply wiring must be provided
at the distribution panel and sized as shown in Table 1
(page 4) or the unit data label, and in accordance with
the NEC and all applicable local codes.
NOTE 2:
In some cases, the over-current protection
specified in Table 1 (or the unit data label) is less than the
60 amp rating of the circuit breakers used in the H6HK
electric heater kit. This difference may occur if the function
of the over-current protection required at the distribution
panel (field supplied) and the function of the circuit breakers
in the H6HK electric heater kit are different.
5, 8, & 10 kw Electric Heater Kits
1. Snap the circuit breaker onto the circuit breaker bracket
as shown in Figure 3. The circuit breaker must be
positioned (side with 1/4" terminals to the right) as
shown in the Figure 2.
2. Remove the lower circuit breaker knockout from the
air handler upper access door.
15, 20, 24/25, & 29/30 kw Electric Heater Kits
NOTE 1:
The heavy red and black supply leads are bundled
by circuit with wire ties at the factory. The bundle coming
from the top element tier is circuit “A”.
NOTE 2:
The element assembly is right-side-up when
the limits are on the right side). The bundle coming from
the second element tier is circuit “B”. The bundle coming
from the bottom element tier is circuit "C".
1. Snap the circuit breakers onto the circuit breaker
bracket as shown in Figure 3. The circuit breakers must
be positioned (side with 1/4" terminals to the right) as
shown in the Figure.
2. Remove all necessary circuit breaker knockouts in
the air handler upper access door.
3-Phase 9 & 15 kw electric heater kits
1. Snap the 3-pole circuit breaker onto the circuit breaker
bracket as shown in Figure 3. The circuit breaker must
be positioned (side with 1/4" terminals to the right) as
shown in the Figure.
2. Remove all circuit breaker knockouts in the air handler
upper access door.
Line Cover
Heater Kits with circuit breakers are supplied with a
line cover shown in Figure 4 (page 6). The line cover is
required by code in order to protect installers from the
line/supply wiring. The line cover should be installed as
shown in Figure 5.
Electric Heater Kits without Circuit Breakers
1. Attach the supplied power terminal block to the circuit
breaker bracket with the supplied screws as shown in
Figure 6 (page 6).
2. Using the 1/4" terminals, connect the red supply wire(s)
from the element assembly to one pole of the terminal
block and connect the black wires to the other pole.
Staging
All Single-phase heater kits are internally staged using
B5, B6, HMG and HMB air handler circuit board logic. B5
air handlers may stage the heater kit with a slow or fast
timed option. B6 single stage air handlers will not stage
the heater kit. B6 two-stage air handlers may stage the
heat Kw turned on with either a low or high heat call. All
3-phase heater kits are not equipped for internal staging.
Refer to the installation instructions supplied with the air
handler for additional staging information
Summary of Contents for H6HK Series
Page 15: ......
