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10
HIGH VOLTAGE ENTRANCE
LOW VOLTAGE ENTRANCE
1:4
30 1/4”*
12 3/8”
(REMOVE PLUG)
4 1/2”
47 1/2”
7 1/2”
POWER THRU
THE CURB
3.5 DIA.
Electrical Entrance and Thru Curb
Unit is equipped with a Low Voltage Terminal Block and
has Single Point wiring to the contactor or power block, if
equipped.
l
Ow
v
Oltage
c
OntrOl
w
iring
1. A 24V thermostat must be installed for unit
operation. It may be purchased with the unit or field
-supplied. Thermostats may be programmable or
electromechanical as required.
2. Locate thermostat or remote sensor in the conditioned
space where it will sense average temperature. Do not
locate the device where it may be directly exposed to
supply air, sunlight or other sources of heat. Follow
installation instructions packaged with the thermostat.
3. Use #18 AWG wire for 24V control wiring runs not
exceeding 75 feet. Use #16 AWG wire for 24V control
wiring runs not exceeding 125 feet. Use #14 AWG wire
for 24V control wiring runs not exceeding 200 feet. Low
voltage wiring may be National Electrical Code (NEC)
Class 2 where permitted by local codes.
4. Route thermostat wires from sub-base terminals to the
unit. Control wiring should enter through the condenser
panel opening or through curb indicated in “Electrical
Entrance” figure. Connect thermostat and any accessory
wiring to low voltage terminal block TB1 in the main
control box.
LOW VOLTAGE
BLOCK
MAIN POWER
LOW VOLTAGE
ENTRANCE
POWER THRU
THE CURB
Power and Low Voltage Block Connections
(NOTE: The locations of components may be different in some
models depending on the options installed.)
F
AILURE
OF
UNIT
DUE
TO
OPERATION
ON
IMPROPER
LINE
VOLTAGE
OR
WITH
EXCESSIVE
PHASE
UNBALANCE
CONSTITUTES
PRODUCT
ABUSE
IS
NOT
COVERED
BY
THE
WARRANTY
AND
MAY
CAUSE
SEVERE
DAMAGE
TO
THE
UNIT
ELECTRICAL
COMPONENTS
.
WARNING
Areas Without Convenience Outlet
It is recommended that an independent 115V power source
be brought to the vicinity of the roof top unit for portable
lights and tools used by the service mechanic.
NOTE:
Refer to local codes for requirements. These outlets
can also be factory installed.
u
nits
installed
On
r
OOf
t
OPs
Main power and low voltage wiring may enter the unit
through the condenser end of unit or through the roof curb.
Install conduit connectors at the desired entrance locations.
External connectors must be weatherproof. All holes in the
unit base must be sealed (including those around conduit
nuts) to prevent water leakage into building. All required
conduit and fittings are to be field supplied.
Supply voltage to roof top unit must not vary by more than
10% of the value indicated on the unit data plate. Phase
voltage unbalance must not exceed 2%. Contact your local
power company for correction of improper voltage or phase
unbalance.