Carrier 40QQ Series - Electric Heater Installation Sequence; General Electric Heater Installation Steps

33
No Fuses
If the unit’s MOCP device rating is 60- A or less, then the
MOCP device is recognized as providing the required
overcurre nt protection to the heater and no internal fusing
is requi red. If two heater modules are installed, a single
point box that contains only a field power terminal block
is required.
Single Point Box Contents
See Package Content tables for a list of components
included in each single point box kit. Note the height
differences and their use in specific size units.
Control Wiring
Heate r modules contain one or two heater control
contactors.
Table 20 – Heater Model Number
Bare Heater Model
Number
C R H E A T E R 0 0 1 A 0 0
Heater Sales Package
PNO Includes:
Bare Heater
Carton and Packing
Material
Installation Sheet
C R H E A T E R 1 0 1
A
or
B
0 0
GENERAL INSTALLATION SEQUENCE
1. Pre- stage heat er packages and single point boxes by
placing the required component cartons at each unit.
2. Check the heater sales package number and single
point box part number (if used) against the part
numbers on the unit’s rating plate.
3. Disconnect power wiring into unit control box from
factory- installed disconnect switch or HACR breaker
and withdraw wiring from control box.
4. Install the single point box, and connect power wiring
tap conductors to field power terminals in main
control box.
5. Install the electric heater module(s) and connect
heat er powe r conductors to single point box or main
unit control box per appropriate connections.
6. Connect the heater control contactors to unit terminal
block TB4.
7. Mark the unit rating plate to indicate which heater
module(s) have been installed.
8. Note the required wire size ampacity for the field
power supply conductors as marked on the unit info
plate as MIN CKT AMPS for accessory heater(s) plus
conveni ence outlet and power exhaust when provided.
Selec t and install suita ble field power c onductors
from external safety disconnect to unit power
connec tion points, or confirm wiring already provided
is suitable for required MIN CKT AMPS.
A
L
LI
E
D
P
A
M
OD
E
L
N
O
.
ER
I
A
L
N
O
.
11
13
C
O
R
P
.
21
23
O
D
2
2
.
2
3
1
2
3
I
S
T
E
D
N
D
I
T
I
O
N
I
N
A
I
R
U
I
P
A
C
C
E
S
G
S
3
4
6
N
.
P
/
N
2
-
5
6
10
-
4
R
E
V
1
1
1
3
2
1
2
3
CONTROL
BOX
BUSHING
SINGLE
MOUNTING
SCREWS
POINT BOX
FOAM
BUSHING
DRIP BOOT
BRACKET
MOUNTING
SCREWS
HEATER
POWER
RELAYS
WIRES
HEATER
MOUNTING
SCREWS
Fig. 36 - Typical Single Point Kit Installation
Check sales packages – Following the project drawing
schedule tables or submittal documents, select the
schedule d heaters and single point boxes (if used) and
place at each unit.
Compare the sales package number(s) for scheduled
heat er modules against the approved usage table on the
unit’s info plate. If the scheduled heater usage does not
appea r on the unit info plate label, STOP. Contact the
projec t engineer or the local distributor sales office for
clarification. Open the cartons and inspect for damage.
40QQ