York Champion Series Technical Manual page 29

036-21311-003-A-0104
4. Unit Controls:
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 contain a reliable time-temperature defrost
control to provide defrost, including field selectable
time periods between cycles (30, 60 and 90 minutes),
factory set at 60 minutes. The defrost control shall also
have an "X" terminal to provide a 24 volt signal for
room thermostat "LED" indication of unit lockout, plus
built in 5 minute anti-short cycle protection.
D. Unit shall have large, easily removable panels, cover-
ing electrical controls and compressor, allowing easy
access for any necessary maintenance or servicing.
ELECTRIC HEATING SECTION
1. An electric heating section, with nickel chromium ele-
ments, shall be provided in a range of 5 thru 25 KW, offer-
ing two stages of capacity - 7 KW and above on single
phase heaters, and one 20 KW and above on three phase
heaters.
Unitary Products Group
2. The heating section shall have a primary limit control(s)
and automatic reset, to prevent the heating element sys-
tem 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 sin-
gle point power supply, with branch circuit fusing (where
required).
UNIT OPERATING CHARACTERISTICS
1. Unit shall be capable of starting and running at 125° F out-
door 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.
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.
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