York YCUL0016 - Manual (Page 119)

YORK INTERNATIONAL 118 YORK INTERNATIONAL 119
FORM 150.63-EG1
low suction pressure, high pressure switch, and
motor protector. Compressor motor protector
shall protect against damage due to high input
current or thermal overload of windings.
9. Unit Safeties: Shall be automatic reset and
cause compressors to shut down if low ambient,
or under voltage.
10. Alarm Contacts: Low ambient, low voltage,
low battery, and (per compressor circuit):
high discharge pressure, and low suction
pressure.
D. Manufacturer shall provide any controls not listed
above, necessary for automatic condensing unit
operation. Mechanical Contractor shall provide
field control wiring necessary to interface sensors
to the condensing unit control system.
2.06 POWER CONNECTION AND
DISTRIBUTION
A. Power Panels:
1. NEMA 3R/12 (IP55) rain/dust tight, powder
painted steel cabinets with hinged, latched, and
gasket sealed outer doors. Provide main power
connection(s), control power connections,
compressor and fan motor start contactors,
current overloads, and factory wiring.
2. Power supply shall enter unit at a single
location, be 3 phase of scheduled voltage,
and connect to individual terminal blocks per
compressor. Separate disconnecting means
and/or external branch circuit protection (by
Contractor) required per applicable local or
national codes.
B. Exposed compressor, control and fan motor power
wiring shall be routed through liquid tight conduit.
2.07 ACCESSORIES AND OPTIONS
Some accessories and options supercede standard
product features. Your YORK representative will be
pleased to provide assistance.
A. Microprocessor controlled, Factory installed
Across-the-Line type compressor motor starters
as standard.
B. Outdoor Ambient Temperature Control
1. Low Ambient Control: Permits unit operation to
0°F ambient. Standard unit controls to 25°F
ambient. Low Ambient Control standard on
YCUL0096-0130 models.
2. High Ambient Control: Permits unit operation
above 115°F ambient.
C. Power Supply Connections:
1. Single Point Power Supply: Single point Termi-
nal Block for field connection and interconnect-
ing wiring to the compressors. Separate exter-
nal protection must be supplied, by others, in
the incoming power wiring, which must comply
with the National Electric Code and/or local
codes. Single Point Supply option available
on YCUL0046-0090 models and standard on
YCUL0016 - 0040 models.
2. Single Point or Multiple Point Power Supply
with individual System Breakers: Single or
Multiple Point Terminal Block(s) for field con
nection and factory interconnecting wiring to
factory supplied system breakers . Available
on YCUL0096-0130 models.
3. Single Point or Multiple Point Disconnect:
Single or Dual point Non-Fused Disconnect(s)
and lockable external handle (in compliance
with Article 440-14 of N.E.C.) can be supplied
to isolate the unit power voltage for servicing.
Separate external fusing must be supplied, by
others, in the in coming power wiring, which
must comply with the National Electric Code
and/or local codes.
4. Single Point Disconnect with Individual System
Breakers: Single point Terminal Block with Non-
Fused Disconnect and lockable external handle
(in compliance with Article 440-14 of N.E.C.)
can be supplied to isolate power voltage for
servicing. Factory interconnecting wiring from
disconnect to factory supplied circuit breakers.
Available on YCUL0096-0130 models.
5. Single Point Circuit Breaker: Single point Ter-
minal Block with Circuit Breaker and lockable
external handle (in compliance with Article 440
14 of N.E.C.) can be supplied to isolate power
voltage for servicing. Incoming power wiring
must comply with the National Electric Code
and/or local codes. Single Point Circuit Break
ers available on YCUL0016-0090 models.
D. Pressure & Temperature Transducers and Sen-
sors
1. Discharge Pressure Transducers: Permits unit
to sense and display discharge pressure.
2. Suction Pressure Transducers: Permits unit
to sense and display suction pressure. This
capability is standard on YCUL0076-0090
models. (This option is required for suction
pressure control on models YCUL0016-0066.)
3. Suction Temperature Sensors: Permits units to