Reznor Q6SD Option - Installation - Elec Heating - Manual (Page 3)

3
In most cases the overcurrent protection specified on
the unit rating label is less than the 60 amp rating of
the circuit breakers used in the units. This is because
the function of the overcurrent protection required
at the distribution panel (field supplied) and the unit
mounted breakers is different.
• When circuit breakers are used they must be used on
all circuits. Refer to Tables 3 - 8 (pages 6 - 9) for the
correct circuit breaker for the application.
• If the number of circuits listed in Tables 3 - 7 are more
than 1, circuit breakers are required. If single circuit
supply wiring is desired: Use the 4-pole circuit adapter
kit (P/N 913350) when two 2-pole circuit breakers are
used. If 3 circuit breakers are used, the 6-pole circuit
adapter kit (P/N 913556) is required.The single circuit
adapter kits are not applicable to 3-phase units.
• If circuit breakers are not being used, proceed to the
Terminal Block section (page 4).
Circuit Breakers
If circuit breakers are used for any circuit, they must be
used for all circuits. Use one breaker for each circuit. See
Tables 3 - 8 (pages 6 - 9).
ELECTRICAL SUPPLY
If the unit was previously installed without electric heat,
the existing supply wiring may not be sufficient to handle
the increased load. See the unit rating label or Tables 9
- 26 (pages 10 - 20) for minimum circuit ampacities and
maximum overcurrent protection ratings. The units with
installed electric heat may be supplied by a single circuit
or by multiple circuits. Additional accessory kits may be
required if single circuit installation and/or circuit breakers
are desired. See Figure 1 for kit identification and Table 1
for accessory descriptions and part numbers.
WARNING:
ELECTRICAL SHOCK, FIRE OR EXPLOSION
HAZARD
Failure to follow safety warnings exactly could
result in serious injury or property damage.
Improper servicing could result in dangerous
operation, serious injury, death or property
damage.
• Before servicing, disconnect all electrical
power to air handler.
• When servicing controls, label all wires prior
to disconnecting. Reconnect wires correctly.
• Verify proper operation after servicing.
Installation
Remove the control box access panel. Locate the 9 pin
(12 pin for 3 phase kits) heater plug assembly and remove
the jumper cap. Discard the jumper cap; it will not be used
after installing the heater kits.
Circuit Options
The units with electric heat may be wired for single or
multiple circuits and may have circuit breakers or terminal
blocks.
NOTE: Circuit breakers installed in the unit are for
short-circuit protection of the internal wiring and to serve
as a unit disconnect. The circuit breakers DO NOT provide
overcurrent protection of the supply wiring.
• Whether or not circuit breakers are used in the
units, overcurrent protection must be provided at the
branch circuit distribution panel and sized as shown
in Tables 9 - 24 (pages 10 - 19) or on the unit rating
label and according to the National Electric Code,
Canadian Electrical Code and applicable local codes.
Table 1. Heater Kits & Accessories
HEATER
KITS
DESCRIPTION
PART
NUMBER
1 Phase
208/230v
H3HK005H-01A (5kw) 917166B
H3HK008H-01A (8kw) 917167B
H3HK010H-01A (10kw) 917168B
H3HK015H-01A (15kw) 917169B
H3HK015H-21A (15kw) 917172B
H3HK020H-01A (20kw) 917170B
H3HK020H-21A (20kw) 917173B
3 Phase
208/230v
H3HK-009Q-01A (9kw) 903854B
H3HK-015Q-01A (15kw) 903855B
3 Phase
460v
H3HK-009S-01A (9kw) 903850B
H3HK-015S-01A (15kw) 903851B
Accessories
4-Pole Single Circuit Adaptor* 913350
6-Pole Single Circuit Adaptor* 913556
Circuit Breaker, 1 Phase (2-Pole) 913554
Circuit Breaker, 3 Phase (3-Pole) 913740
* Single phase models only
H 3 HK 008 - H 0 1
Heater
Heater Kit
3-Pkgd. Units
Electric
Heater KW
No. of Breakers
Electric Code
H=240-1-60
Stages
Sequencer
Figure 1. Heater Kit Identification Code