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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.
Summary of Contents for WeatherExpert 50LC14
Page 4: ...4 Fig 2 50LC Vertical Airflow Size 14...
Page 5: ...5 Fig 3 50LC Horizontal Airflow Size 14...
Page 6: ...6 Fig 4 50LC Back View and Condensate Drain Location Size 14...
Page 7: ...7 Fig 5 50LC Corner Weights and Clearances Size 14...
Page 8: ...8 Fig 6 50LC Bottom View Size 14...
Page 9: ...9 Fig 7 50LC Vertical Airflow Sizes 17 20...
Page 10: ...10 Fig 8 50LC Horizontal Airflow Sizes 17 20...
Page 11: ...11 Fig 9 50LC Back View and Condensate Drain Location Sizes 17 20...
Page 12: ...12 Fig 10 50LC Corner Weights and Clearances Sizes 17 20...
Page 13: ...13 Fig 11 50LC Bottom View Sizes 17 20...
Page 14: ...14 Fig 12 50LC Vertical Airflow Sizes 24 26...
Page 15: ...15 Fig 13 50LC Horizontal Airflow Sizes 24 26...
Page 16: ...16 Fig 14 50LC Back View and Condensate Drain Location Sizes 24 26...
Page 17: ...17 Fig 15 50LC Corner Weights and Clearances Sizes 24 26...
Page 18: ...18 Fig 16 50LC Bottom View Sizes 24 26...
Page 21: ...21 Fig 19 Roof Curb Details 14 Size Unit...
Page 22: ...22 Fig 20 Roof Curb Details 17 and 20 Size Units...
Page 23: ...23 Fig 21 Roof Curb Details 24 and 26 Size Units...
Page 30: ...30 Fig 42 50LC 14 26 Electro Mechanical Control Wiring Diagram...
Page 31: ...31 Fig 43 50LC 14 26 RTU Open Control Wiring Diagram...
Page 32: ...32 Fig 44 50LC 14 26 SystemVu Control Wiring Diagram...
Page 35: ...35 Fig 47 Typical Power Wiring Diagram SystemVu Controls 50LC Unit 208 230V Shown...
Page 36: ...36 Fig 48 Typical Power Wiring Diagram SystemVu Controls 50LC Unit 460V 575V Shown...
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