GUIDE SPECIFICATION
Furnish and install YORK Sunline air-cooled condensing units
or equivalent, suitable for ground or roof mounting. Units shall
have capacities and efficiencies as outlined in the schedules
shown on the plans and shall be installed in accordance with
all applicable national and local codes.
I. General
A. Units shall be manufactured in a facility registered under
the ISO 9002 manufacturing quality standard.
B. Units shall be UL and CSA approved.
C Unit shall be packaged to allow outdoor storage
D. Hermetic compressors shall be covered by a five year
limited warranty.
All other unit parts shall be covered by a full year limited
warranty.
II. Unit Cabinet
A. Cabinet shall be constructed of 18 gauge, zinc-coated
steel, finished with a powder paint process capable of
withstanding a minimum of 750 salt spray hours
according to ASTM B117.
B. Cabinet screws shall comply with the ASTM B117 salt
spray test for a minimum of 750 hours.
C. Panels shall be removable for easy access to all internal
components during maintenance and service.
D. Cabinet shall feature a separate access panel for the
controls so that unit airflow need not be disturbed during
servicing.
E. Permanently attached base rails shall have 3-way fork
lift access and lifting holes for ease of installation.
III. Compressor
A. Compressor shall be a tandem reciprocating or scroll
compressor with integral motor overload protection.
B. Reciprocating compressors shall have an integral
crankcase heater to keep refrigerant from diluting the
compressor oil in the sump (H*CE150 is a scroll).
Crankcase heater shall be field replaceable without
removal of the charge.
C. Compressor shall be mounted on isolators to limit the
transmission of sound and vibration.
IV. Condenser and Fans
A. Fan motors shall be single phase, direct-drive with
propeller-type condenser fans which discharge air
vertically upward.
B. Units with more than one condenser fan motor shall be
wired to distribute the single phase motor loads across
the 3 phase power supply, thus minimizing phase
imbalance on multiple unit installations.
C. Fan motors shall totally enclosed with permanently
lubricated ball-bearings for longer wear during start and
stop cycles.
D. Fan motors shall have inherent overload protection.
E. Coil shall be constructed of rifled copper tubing
mechanically expanded and bonded to louvered
aluminum fins. Coil shall include an integral subcooler.
V.Refrigeration Components - Refrigeration system shall
contain the following:
•
High and low pressure cut-outs
•
Service valves to ease installation and recovery of
refrigerant
•
External ports to accomodate gauge lines, allowing for
easy servicing
•
Filter drier shipped in unit for field installation
•
Holding charge of R-22
VI. Controls - Unit controls shall include:
A. 24 volt control circuit with terminal blocks.
B. Color-coded wiring for easy service and troubleshooting.
C. Independent line break thermal protection for the
condenser fans.
C. 5 minute anti-short cycle timer to protect the compressor
from frequent cycling.
D. Unit safety lockouts which automatically reset from the
thermostat once the anti-short cycle timer is satisfied.
Safety lockouts will also generate a 24 volt signal to the
"X" terminal, allowing notification to the user via the
thermostat fault light (if present). These safety lockouts
shall include:
1. High refrigerant pressure
2. Low refrigerant pressure (low refrigerant pressure shall
be bypassed for the first 90 seconds of operation to
eliminate nuisance trips).
550.23-TG1Y
Unitary Products Group
9
