Carrier WeatherExpert 50LC14, Installation Instructions Manual, Page: 37 / 84

37
UNITS WITHOUT FACTORY-INSTALLED NON-FUSED
DISCONNECT OR HACR
When installing units, provide a disconnect switch per NEC
(National Electrical Code) of adequate size. Disconnect sizing
data is provided on the unit informative plate. Locate on unit
cabinet or within sight of the unit per national or local codes. Do
not cover unit informative plate if mounting the disconnect on
the unit cabinet.
UNITS WITH FACTORY-INSTALLED NON-FUSED
DISCONNECT OR HACR
The factory-installed optional non-fused disconnect (NFD) or
HACR switch is located in the main control box. The manual
switch handle and shaft are shipped in the control box and must be
mounted on the corner post adjacent to the control box (see Fig. 49
or 50). Note that the tape covering the hole for the shaft in the cor -
ner post must be removed prior to handle and shaft installation.
Field-Install the NFD Shaft and Handle
1. Open the control box panel.
2. Make sure the NFD shipped from the factory is at OFF
position (the arrow on the black handle knob or on the sil -
ver metal collar is at OFF).
3. Insert the shaft with the cross pin on the top of the shaft in
the horizontal position.
4. Measure the tip of the shaft to the outside surface of the
corner post to be 0.88-in.
5. Tighten the locking screw to secure the shaft to the NFD.
6. Turn the handle to OFF position with red arrow pointing at
OFF.
7. Install the handle on to the corner post vertically with the
red arrow pointing up.
8. Secure the handle to the corner post with (2) screws and
lock washers supplied.
Fig. 49 — Handle and Shaft Assembly for NFD
Field-Install the HACR Shaft and Handle
1. Open the control box panel.
2. Make sure the HACR shipped from the factory is at OFF
position (the white arrow pointing at OFF).
3. Insert the shaft with the cross pin on the top of the shaft in
the horizontal position.
4. Measure the tip of the shaft to the outside surface of the
corner post to be 0.88-in.
5. Tighten the locking screw to secure the shaft to the HACR.
6. Turn the handle to OFF position with red arrow pointing at
OFF.
7. Install the handle on to the corner post vertically with the
red arrow pointing up.
8. Secure the handle to the corner post with (2) screws and
lock washers supplied.
Fig. 50 — Handle and Shaft Assembly for HACR
ALL UNITS
All field wiring must comply with NEC and all local code
requirements.
Size wire based on MCA (Minimum Circuit Amps) on the unit in -
formative plate. See Fig. 51 for power wiring connections to the
unit power terminal block and equipment ground. Maximum wire
size is 2/0 AWG per pole.
Provide a ground-fault and short-circuit over-current protection
device (fuse or breaker) per NEC Article 440 (or local codes). Re -
fer to unit informative data plate for MOCP (Maximum Over-
current Protection) device size.
Units ordered with factory-installed HACR do not need additional
ground-fault and short circuit over current protection device un -
less required by local codes.