508216-01
Issue 2130
Page 27 of 42
Electrical Wiring
All field wiring must be done in accordance with the National
Electrical Code (NEC) recommendations, Canadian
Electrical Code (CEC) and CSA Standards, or local codes,
where applicable.
Electrical Shock Hazard!
Turn OFF electric power before connecting
unit, performing any maintenance or
removing panels or doors. More than one
disconnect may be required to turn off all
power.
FAILURE TO DO SO COULD RESULT IN
BODILY INJURY OR DEATH.
WARNING
Unit must be grounded in accordance with national and
local codes. Failure to ground unit properly can result in
personal injury or death.
WARNING
Line voltage is present at all components when unit is
not in operation on units with single pole contactors.
Disconnect all remote electric power supplies before
opening access panel. Unit may have multiple power
supplies. Failure to disconnect all power supplies could
result in personal injury or death.
WARNING
Refer to the furnace or blower coil Installation Instructions
for additional wiring application diagrams and refer to unit
rating plate for minimum circuit ampacity and maximum
overcurrent protection size.
1.
Install line voltage power supply to unit from a properly
sized disconnect switch. Any excess high voltage field
wiring should be trimmed or secured away from the
low voltage field wiring.
2.
High voltage power connections to 3-phase models
is made to “Pig Tail” leads with field supplied splice
connectors.
3. Ground unit at unit disconnect switch or to an earth
ground. To facilitate conduit, a hole is in the bottom
of the control box. Connect conduit to the control box
using a proper conduit fitting. Units are approved for
use only with copper conductors. 24V Class II circuit
connections are made in the low voltage junction box.
A complete unit wiring diagram is located inside the
unit control box cover.
4.
Install room thermostat according to thermostat
installation instruction and on an inside wall that is
not subject to drafts, direct sunshine, or other heat
sources.
5.
Install low voltage wiring from outdoor to indoor unit
and from thermostat to indoor unit (see Figure 8).
6.
Do not bundle any excess 24V control wire inside
control box. Run control wire through installed wire tie
and tighten wire tie to provide low voltage strain relief
and to maintain separation of field-installed low and
high voltage circuits.
1 Refer to thermostat installation instructions
2 “L” is used for any accessories (e.g. diagnostic /
warning / alarm), used to activate thermostat
warning light
R
R
R
C
C
C
G
G
Indoor Blower Only
Thermostat
Indoor Unit
Outdoor Unit
L
L
Y1
Compressor
Y1
1
1
L
2
W
W1
Heat
1
Figure 8.
Thermostat Designations -
Non-Communicating
Summary of Contents for 4SCU13LE/B
Page 32: ...508216 01 Issue 2130 Page 32 of 42 Figure 12 A C Single Phase Wiring Diagram Wiring Diagram ...
Page 33: ...508216 01 Issue 2130 Page 33 of 42 Figure 13 A C Single Phase Wiring Diagram 59 model only ...
Page 34: ...508216 01 Issue 2130 Page 34 of 42 Figure 14 3 Phase 208 230 Volt ...
Page 35: ...508216 01 Issue 2130 Page 35 of 42 Figure 15 3 Phase 460 Volt ...
Page 39: ...508216 01 Issue 2130 Page 39 of 42 Charge Labels Figure 16 4SCU13L 3 through 5 ...
Page 40: ...508216 01 Issue 2130 Page 40 of 42 Figure 17 4SCU13L 2 ...
Page 41: ...508216 01 Issue 2130 Page 41 of 42 Figure 18 4SCU13L 1 ...
