Carrier WeatherMaster 50HC*A07 Series, Руководство по установке

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16
UNITS WITH FACTORY-INSTALLED NON-FUSED DIS-
CONNECT OR HACR
The factory-installed optional non-fused disconnect
(NFD) or HACR switch is located in a weatherproof enclo-
sure located under the main control box. The manual switch
handle and shaft are shipped in the disconnect or HACR en-
closure. Assemble the shaft and handle to the switch at this
point. Discard the factory test leads (see Fig. 18).
Fig. 19 — Disconnect Switch and Unit
Connect field power supply conductors to LINE side ter-
minals when the switch enclosure cover is removed to attach
the handle.
Field-Install the NFD Shaft and Handle
1. Remove the unit front panel (see Fig. 2 on page 4 or
Fig. 3 on page 6).
2. Remove (3) hex screws on the NFD enclosure — (2) on
the face of the cover and (1) on the left side cover. See
Fig. 20.
3. Remove the front cover of the NFD enclosure.
4. Make sure the NFD shipped from the factory is at OFF
position (the arrow on the black handle knob is at OFF).
5. Insert the shaft with the cross pin on the top of the shaft
in the horizontal position. See Fig. 21.
6. Measure from the tip of the shaft to the top surface of the
black pointer; the measurement should be 3.75 to 3.88 in.
(95 to 99 mm).
7. Tighten the locking screw to secure the shaft to the NFD.
8. Turn the handle to the OFF position with red arrow
pointing at OFF.
9. Install the handle on to the painted cover horizontally
with the red arrow pointing to the left.
10. Secure the handle to the painted cover with (2) screws
and lock washers supplied.
11. Engaging the shaft into the handle socket, re-install (3)
hex screws on the NFD enclosure.
12. Re-install the unit front panel.
Fig. 20 — NFD Enclosure Location
Fig. 21 — NFD Handle and Shaft Assembly
Field-Install the HACR Shaft and Handle
1. Remove unit front panel (see Fig. 2 on page 4 or Fig. 3
on page 6).
2. Remove (3) hex screws on the HACR enclosure — (2)
on the face of the cover and (1) on the left side cover. See
Fig. 22.
3. Remove the front cover of the HACR enclosure.
4. Make sure the HACR shipped from the factory is at OFF
position (the white arrow pointing at OFF).
5. Insert the shaft all the way with the cross pin on the top
of the shaft in the horizontal position. See Fig. 23.
6. Tighten the locking screw to secure the shaft to the
HACR.
7. Turn the handle to the OFF position with red arrow
pointing at OFF.
8. Install the handle on to the painted cover horizontally
with the red arrow pointing to the left.
9. Secure the handle to the painted cover with (2) screws
and lock washers supplied.
10. Engaging the shaft into the handle socket, re-install (3)
hex screws on the HACR enclosure.
11. Re-install the unit front panel.
WARNING
Failure to follow this caution could result in fire, intermittent
operation, or unsatisfactory performance.
Do not connect aluminum wire between disconnect
switch and air conditioning unit. Use only copper wire.
See Fig. 19.
COPPER
WIRE ONLY
ELECTRIC
DI S CONNECT
S WITCH
ALUMINUM
WIRE