15
Step 10 — Make Electrical Connections
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Do not use gas piping as an electrical ground.
Unit
cabinet must have an uninterrupted, unbroken
electrical ground to minimize the possibility of
personal injury if an electrical fault should occur. This
ground may consist of electrical wire connected to
unit ground lug in control compartment, or conduit
approved for electrical ground when installed in
accordance with NEC (National Electrical Code);
ANSI/NFPA 70, latest edition (in Canada, Canadian
Electrical
Code
CSA
[Canadian
Standards
Association] C22.1), and local electrical codes.
!
WARNING
NOTE
: Check all factory and field electrical connections
for tightness. Field--supplied wiring shall conform with
the limitations of 63
_
F (33
_
C) rise.
Field Power Supply —
For those units without through--the--curb power, conduit
must be used to route the main power from the condenser
end of the unit to either the factory option disconnect, the
bottom of the control box or the single point box accessory.
1 inch conduit is provided behind the access panel located
under the control box. For those units that require conduit
larger than 1 inch, it must be field supplied. Figures 19--21
show the various wire routings.
If the field disconnect is larger than 100A, it must be
attached to the unit using accessory CRDISBKT001A00
(see Fig. 22). Follow the instructions provided with this
accessory. For smaller field disconnects, be sure to use
1
/
2
in.
screws to mount the disconnect directly to the end panel
(see Fig. 23). In either case, set the disconnect vertical
location on the unit so that a 90 degree fitting can be used
to connect the conduit to the disconnect.
C10010
Fig. 19 -- Conduit into Factory Option Disconnect
C10011
Fig. 20 -- Conduit into Control Box
C10012
Fig. 21 -- Conduit into Single Point Box
C10014
Fig. 22 -- Mounting Position for Field Disconnects
(over 100A)
Summary of Contents for 548J*14D Series
Page 5: ...5 a548J 011 Fig 2 Unit Dimensional Drawing Size 14 Unit...
Page 6: ...6 a548J 012 Fig 2 Unit Dimensional Drawing Size 14 Unit cont...
Page 10: ...10 a548J 013 Fig 6 Roof Curb Details...
Page 17: ...17 a50 9707 Fig 26 Typical 548J Size 14 Control Wiring Diagram...
Page 43: ...43 a50 9711 Fig 49 RTU Open Controller System Wiring Diagram...
