9
FIELD CONTROL WIRING — Install a Carrier-approved
accessory thermostat assembly according to the installation
instructions included with the accessory. Refer to unit Price
Pages or contact your local representative for more informa-
tion. Locate thermostat assembly on a solid wall in the condi-
tioned space to sense average temperature.
Route thermostat cable or equivalent single leads of no. 18
AWG (American Wire Gage) colored wire from subbase termi-
nals through conduit in unit to low-voltage connections as
shown on unit label wiring diagram and in Fig. 12.
NOTE: For wire runs up to 50 ft, use no. 18 AWG insulated
wire (35 C minimum). For 50 to 75 ft, use no. 16 AWG insu-
lated wire (35 C minimum). For over 75 ft, use no. 14 AWG
insulated wire (35 C minimum). All wire larger than no. 18
AWG cannot be directly connected to the thermostat and will
require a junction box and splice at the thermostat.
Set heat anticipator settings as indicated in Table 3. Settings
may be changed slightly to provide a greater degree of comfort
for a particular installation.
OPTIONAL NON-FUSED DISCONNECT — On units with
the optional non-fused disconnect, incoming power will be
wired into the disconnect switch. Refer to Fig. 13 for wiring
for 100 and 200 amp disconnect switches. Units with an
MOCP (maximum overcurrent protection) under 100 will use
the 100 amp disconnect switch. Units with an MOCP over 100
will use the 200 amp disconnect switch. Refer to the applicable
disconnect wiring diagram.
To prevent breakage during shipping, the disconnect han-
dle and shaft are shipped and packaged inside the unit control
box. Install the disconnect handle before unit operation. To in-
stall the handle and shaft, perform the following procedure:
1. Open the control box door and remove the handle and
shaft from shipping location.
2. Loosen the Allen bolt located on the disconnect switch.
The bolt is located on the square hole and is used to hold
the shaft in place. The shaft cannot be inserted until the
Allen bolt is moved.
3. Insert the disconnect shaft into the square hole on the dis-
connect switch. The end of the shaft is specially cut and
the shaft can only be inserted in the correct orientation.
4. Tighten the Allen bolt to lock the shaft into position.
5. Close the control box door.
6. Attach the handle to the external access door with the two
screws provided. When the handle is in the ON position,
the handle will be vertical. When the handle is in the OFF
position, the handle will be horizontal.
7. Turn the handle to the OFF position and close the door.
The handle should fit over the end of the shaft when the
door is closed.
8. The handle must be in the OFF position to open the con-
trol box door.
OPTIONAL CONVENIENCE OUTLET — On units with
optional convenience outlet, a 115-v GFI (ground fault inter-
rupt) convenience outlet receptacle is provided for field wiring.
Field wiring should be run through the
7
/
8
-in. knockout pro-
vided in the basepan near the return air opening.
Table 3 — Heat Anticipator Settings
UNIT 50HJQ
UNIT
VOLTAGE
HEATER
kW
STAGE 1 STAGE 2
014
208/230
14/19 .40 —
26/34 .40 .40
42/56 .66 .40
460
15 .40 —
32 .40 .40
55 .40 .66
575 37 .40 .66
016
208/230
26/34 .40 .66
42/56 .66 .40
460
32 .40 .40
55 .40 .66
575 50 .66 .66
3/4" FPT DRAIN
CONNECTION
1-3/8"
DRAIN HOLE
INDOOR FAN MOTOR ACCESS
FILTER
ACCESS
Fig. 9 — Condensate Drain Details
Fig. 10 — Condensate Drain Piping Details
LEGEND
NOTE: The maximum wire size for TB1 is 350 kcmil for all unit voltages.
Fig. 11 — Field Power Wiring Connections
EQUIP GND — Equipment Ground
kcmil — Thousand Circular Mils
NEC — National Electrical Code
TB — Terminal Block
Fig. 12 — Field Control Thermostat Wiring
To Next Page
Loading...
