Johnson Controls ACPU024 THRU 060 - Manual (Page 30)

279815-PTG-D-0408
30 Johnson Controls Unitary Products
a. Unit shall contain a large, low voltage Terminal Board for
easy connection of field low voltage wiring.
b. Controls shall be mounted in a large control box with tilt-
out, hinged access door, allowing easy access for trouble
shooting and maintenance without affecting the normal
system operation pressures.
c. Unit shall have large, easily removable panels, covering
electrical controls and compressor, allowing easy access
for any necessary maintenance or servicing.
ELECTRIC HEATING SECTION
1. An electric heating section, with nickel chromium elements,
shall be provided in a range of 5 thru 25 KW, offering two
stages of capacity - 7 KW and above on single phase
heaters, and 20 KW and above on three phase heaters.
2. The heating section shall have a primary limit control(s)
and automatic reset, to prevent the heating element
system from operating at an excessive temperature.
3. The heating section assembly shall slide out of the unit for
easy maintenance and service.
4. Units with electric heating sections shall be wired for a
single point power supply, with branch circuit fusing (where
required).
UNIT OPERATING CHARACTERISTICS
1. Unit shall be capable of starting and running at 125° F
outdoor temperature, exceeding maximum load criteria of
ARI Standard 210/240.
2. The compressor, with standard controls, shall be capable
of operation down to 45° F outdoor temperature. Accessory
low ambient kit shall be available for operation to 0° F.
ELECTRICAL REQUIREMENTS
All unit power wiring shall enter unit cabinet at a single factory
provided location and be capable of side or bottom entry, to
minimize roof penetrations and avoid unit field modifications.
Separate side and bottom openings shall be provided for the
control wiring.