This equipment is a relatively complicated apparatus. During installation, operation, maintenance or service, individuals may be exposed to certain components or
conditions including, but not limited to: refrigerants, oils, materials under pressure,
rotating components, and both high and low voltage. Each of these items has the
potential, if mis-used or handled improperly , to cause bodily injury or death. It is the
obligation and responsibility of operating/service personnel to identify and recognize these inherent hazards, protect themselves, and proceed safely in completing
their tasks. Failure to comply with any of these requirements could result in serious
damage to the equipment and the property in which it is situated, as well as severe
personal injury or death to themselves and people at the site.
This document is intended for use by owner-authorized operating/service personnel. It is expected that this individual possesses independent training that will enable them to perform their assigned tasks properly and safely. It is essential that,
prior to performing any task on this equipment, this individual shall have read and
understood this document and any referenced materials. This individual shall also
be familiar with and comply with all applicable governmental standards and regulations pertaining to the task in question.
SAFETY SYMBOLS
The following symbols are used in this document to alert the reader to areas of
potential hazard:
DANGER indicates an imminently hazardous situation which, if not avoided,
will result in death or serious injury.
WARNING indicates a potentially hazardous situation which, if not avoided,
could result in death or serious injury.
2
YORK INTERNATIONAL
FORM 150.62-NM1
CAUTION identifies a hazard which could lead to damage to the machine,
damage to other equipment and/or environmental pollution. Usually an
instruction will be given, together with a brief explanation.
NOTE is used to highlight additional information which may be helpful to
you.
CHANGEABILITY OF THIS DOCUMENT
In complying with YORK’s policy for continuous product improvement, the information contained in this document is subject to change without notice. While YORK
makes no commitment to update or provide current information automatically to the
manual owner, that information, if applicable, can be obtained by contacting the
nearest YORK Engineered Systems Service office.
It is the responsibility of operating/service personnel to verify the applicability of
these documents to the equipment in question. If there is any question in the mind
of operating/service personnel as to the applicability of these documents, then prior
to working on the equipment, they should verify with the owner whether the equipment has been modified and if current literature is available.
3. X :w/in OPTIONS FIELD, DENOTES NO OPTION SELECTED
4. Agency Files (i.e. U.L. / E.T .L.; C.E.; ARI; ETC.) will contain info. based on the first 14 characters only.
HOT DISCHARGE
GAS LINE
REFRIGERANT FLOW DIAGRAM
AIR COOLED CONDENSERS
(INCLUDING TEMPERATURE SENSORS & PRESSURE TRANSDUCERS)
LIQUID LINE FILTER / DRIER
LIQUID LINE
SERVICE V ALVE
FORM 150.62-NM1
YCAL REFRIGERANT FLOW DIAGRAM
NOTE: YCAL0040-0080 HAVE TWO REFRIGERANT
SYSTEMS AND ONE DX COOLER.
* HOT GAS OPTION - SYSTEM 1 ONLY
SIGHT GLASS /
MOISTURE INDICATOR
LIQUID LINE
SOLENOID VALVE
DISCHARGE LINE
BALL VALVE
SERVICE V ALVE
2 OR 3 COMPRESSORS PER SYSTEM
OPTIONAL DISCHARGE
PRESSURE TRANSDUCER
HIGH PRESSURE
CUTOUT SWITCH
SERVICE
VALVE
LOW PRESSURE SWITCH OR
SUCTION PRESSURE TRANSDUCER
OIL EQUALIZING
LINE
SUCTION LINE
BALL VALVE
LEAVING CHILLED WATER
SOLENOID OPERATED
*
HOT GAS BY PASS VALVE
RELIEF VALVE
300 PSIG
(20.68 BARG)
DX COOLER
LEAVING
CHILLED WATER
TEMP. SENSOR
TXV
EQUALIZER
RETURN WATER
TEMP. SENSOR
ENTERING CHILLED WATER
LINE
LD03844
FIG. 1 – REFRIGERANT FLOW DIAGRAM
YORK INTERNATIONAL
9
Installation
INSTALLATION
To ensure warranty coverage, this
equipment must be commissioned and
serviced by an authorized YORK service mechanic or a qualified service
person experienced in chiller installation. Installation must comply with
all applicable codes, particularly in
regard to electrical wiring and other
safety elements such as relief valves,
HP cut-out settings, design working
pressures, and ventilation requirements consistent with the amount and
type of refrigerant charge.
Lethal voltages exist within the control panels. Before servicing, open and
tag all disconnect switches.
INST ALLATION CHECK LIST
The following items, 1 thru 5, must be checked before
placing the units in operation.
1. Inspect the unit for shipping damage.
2. Rig unit using spreader bars.
3. Open the unit only to install water piping system. Do
not remove protective covers from water connections
until piping is ready for attachment. Check water piping to insure cleanliness.
4. Pipe unit using good piping practice (see ASHRAE
handbook section 215 and 195.
5. Check to see that the unit is installed and operated
within limitations (Refer to LIMIT ATIONS).
The following pages outline detailed procedures to be
followed to install and start-up the chiller.
HANDLING
The unit should be lifted by inserting hooks through
the holes provided in unit base rails. Spreader bars
should be used to avoid crushing the unit frame
rails with the lifting chains. See below.
29224(RIG)A
INSPECTION
Immediately upon receiving the unit, it should be inspected for possible damage which may have occurred
during transit. If damage is evident, it should be noted
in the carrier’s freight bill. A written request for inspection by the carrier’s agent should be made at once. See
“Instruction” manual, Form 50.15-NM for more information and details.
LOCA TION AND CLEARANCES
These units are designed for outdoor installations on
ground level, rooftop, or beside a building. Location
should be selected for minimum sun exposure and to
insure adequate supply of fresh air for the condenser.
The units must be installed with sufficient clearances
for air entrance to the condenser coil, for air discharge
away from the condenser, and for servicing access.
In installations where winter operation is intended and
snow accumulations are expected, additional height
must be provided to insure normal condenser air flow.
These units are shipped as completely assembled units
containing full operating charge, and care should be
taken to avoid damage due to rough handling.
10
Clearances are listed under “Notes” in the “DIMENSIONS” section.
YORK INTERNATIONAL
FORM 150.62-NM1
FOUNDATION
The unit should be mounted on a flat and level foundation, floor, or rooftop capable of supporting the entire
operating weight of the equipment. See PHYSICAL
DATA for operating weight. If the unit is elevated beyond the normal reach of service personnel, a suitable
catwalk must be capable of supporting service personnel, their equipment, and the compressors.
GROUND LEVEL LOCATIONS
It is important that the units be installed on a substantial
base that will not settle. A one piece concrete slab with
footers extended below the frost line is highly recommended. Additionally , the slab should not be tied to the
main building foundations as noise and vibration may
be transmitted. Mounting holes are provided in the steel
channel for bolting the unit to its foundation. (See DIMENSIONS.)
For ground level installations, precautions should be
taken to protect the unit from tampering by or injury to
unauthorized persons. Screws and/or latches on access
panels will prevent casual tampering. However, further
safety precautions such as a fenced-in enclosure or
locking devices on the panels may be advisable.
ROOFTOP LOCATIONS
Choose a spot with adequate structural strength to safely
support the entire weight of the unit and service personnel. Care must be taken not to damage the roof.
SPRING ISOLA TORS (OPTIONAL)
When ordered, four (4) isolators will be furnished.
Identify the isolator, and locate at the proper mounting
point, and adjust per instructions. See Appendix 1.
1
COMPRESSOR MOUNTING
The compressors are mounted on four (4) rubber isolators. The mounting bolts should not be loosened or adjusted at installation of the chiller.
REMOTE COOLER OPTION
For units using remote cooler option, refer to instructions included with miscellaneous cooler parts kit.
The unit is shipped with a 6 lb. (2.7 kg) holding charge.
The remainder of the charge must be weighed-in according to the operating charge listed under Physical
Data. Additional charge must also be added for the refrigerant lines.
CHILLED WATER PIPING
General – When the unit has been located in its final
position, the unit water piping may be connected. Normal installation precautions should be observed in order to receive maximum operating efficiencies. Piping
should be kept free of all foreign matter. All chilled water evaporator piping must comply in all respects with
local plumbing codes and ordinances.
Consult the building contractor or architect if the roof is
bonded. Roof installations should have wooden beams
(treated to reduce deterioration), cork, rubber, or vibration isolators under the base to minimize vibration.
NOISE SENSITIVE LOCA TIONS
Efforts should be made to assure that the chiller is not
located next to occupied spaces or noise sensitive areas where chiller noise level would be a problem. Chiller
noise is a result of compressor and fan operation. Considerations should be made utilizing noise levels published in the YORK Engineering Guide for the specific
chiller model. Sound blankets for the compressors and
low sound fans are available.
Since elbows, tees and valves decrease pump capacity, all piping should be kept as straight and as simple
as possible possible. All piping must be supported
independent of the chiller.
Consideration should be given to compressor access when laying out water
piping. Routing the water piping too
close to the unit could make compressor servicing/replacement difficult.
YORK INTERNATIONAL
11
Installation
Hand stop valves should be installed in all lines to facilitate servicing.
Piping to the inlet and outlet connections of the chiller
should include high-pressure rubber hose or piping loops
to insure against transmission of water pump vibration.
The necessary components must be obtained in the
field.
Drain connections should be provided at all low points
to permit complete drainage of the cooler and system
water piping.
A small valve or valves should be installed at the highest point or points in the chilled water piping to allow
any trapped air to be purged. Vent and drain connections should be extended beyond the insulation to make
them accessible.
The piping to and from the cooler must be designed to
suit the individual installation. It is important that the
following considerations be observed:
1. The chilled liquid piping system should be laid out so
that the circulating pump discharges directly into the
cooler. The suction for this pump should be taken
from the piping system return line and not the cooler.
This piping scheme is recommended, but is not mandatory.
2. The inlet and outlet cooler connection sizes are 3"
(YCAL0014 - 0030), 4" (YCAL0034 - 0060), or 6"
(YCAL0064 - 0080).
3. A strainer, preferably 40 mesh, must be installed in
the cooler inlet line just ahead of the cooler. This is
important to protect the cooler from entrance of large
particles which could cause damage to the evaporator.
4. All chilled liquid piping should be thoroughly flushed
to free it from foreign material before the system is
placed into operation. Use care not to flush any foreign material into or through the cooler.
5. As an aid to servicing, thermometers and pressure
gauges should be installed in the inlet and outlet wa-
ter lines.
6. The chilled water lines that are exposed to outdoor
ambients should be wrapped with supplemental
heater cable and insulated to protect against freezeup during low ambient periods, and to prevent formation of condensation on lines in warm humid locations.
7. A chilled water flow switch, (either by YORK or others) MUST be installed in the leaving water piping of
the cooler. There should be a straight horizontal run
of at least 5 diameters on each side of the switch.
Adjust the flow switch paddle to the size of the pipe
in which it is to be installed. (See manufacturer’s instructions furnished with the switch.) The switch is to
be wired to terminals 13 – 14 of CTB1 located in the
control panel, as shown on the unit wiring diagram.
The Flow Switch MUST NOT be used
to start and stop the chiller (i.e. starting and stopping the chilled water
pump). It is intended only as a safety
switch.
WIRING
Liquid Chillers are shipped with all factory mounted controls wired for operation.
Field Wiring – Power wiring must be provided through
a fused disconnect switch to the unit terminals (or optional molded disconnect switch) in accordance with
N.E.C. or local code requirements. Minimum circuit
ampacity and maximum dual element fuse size are given
in the Tables 2 – 6.
A 120-1-60, 15 amp source must be supplied for the
control panel through a fused disconnect when a control panel transformer (optional) is not provided. Refer
to Table 1 and Figures 2 - 4.
See Figures 2 - 5 and unit wiring diagrams for field and
power wiring connections, chilled water pump starter
contacts, alarm contacts, compressor run status contacts, PWM input, and load limit input. Refer to section
on UNIT OPERATION for a detailed description of operation concerning aforementioned contacts and inputs.
12
YORK INTERNATIONAL
FORM 150.62-NM1
EV APORATOR PUMP START CONTACTS
Terminal block CTB2 - terminals 23 to 24, are normally
open contacts that can be used to switch field supplied
power to provide a start signal to the evaporator pump
contactor. The contacts will be closed when any of the
following conditions occur:
1. Low Leaving Chilled Liquid Fault
2. Any compressor is running.
3. Daily schedule is not programmed OFF and the
Unit Switch is ON.
The pump will not run if the micropanel has been powered up for less than 30 seconds, or if the pump has
run in the last 30 seconds, to prevent pump motor overheating. Refer to figure 5 and unit wiring diagram.
SYSTEM RUN CONTACTS
Contacts are available to monitor system status.
Normally-open auxiliary contacts from each compressor
contactor are wired in parallel with CTB2 - terminals 25
to 26 for system 1, and CTB2 - terminals 27 to 28 for
system 2 (YCAL0040 - YCAL0080). Refer to Figure 5
and unit wiring diagram.
ALARM ST ATUS CONTACTS
REMOTE EMERGENCY CUTOFF
Immediate shutdown of the chiller can be accomplished
by opening a field installed dry contact to break the electrical circuit between terminals 5 to L on terminal block
CTB2. The unit is shipped with a factory jumper installed
between terminals 5 to L, which must be removed if
emergency shutdown contacts are installed. Refer to
Figure 5 and unit wiring diagram.
PWM INPUT
The PWM input allows reset of the chilled liquid setpoint by supplying a “timed” contact closure. Field wiring should be connected to CTB1 - terminals 13 to 20.
A detailed explanation is provided in the Unit Control
section. Refer to Figure 5 and unit wiring diagram.
LOAD LIMIT INPUT
Load limiting is a feature that prevents the unit from
loading beyond a desired value. The unit can be “load
limited” either 33%, 50%, or 66%, depending on the
number of compressors on unit. The field connections
are wired to CTB1 - terminals 13 to 21, and work in
conjunction with the PWM inputs. A detailed explanation is provided in the Unit Control section. Refer to figure 5 and unit wiring diagram.
1
Normally-open contacts are available for each refrigerant
system. These normally-open contacts close when the
system if functionally normally . The respective contacts
will open when the unit is shut down on a unit fault, or
locked out on a system fault. Field connections are at
CTB2 terminals 29 to 30 (system 1), and terminals 31 to
32 (system 2 YCAL0040 - YCAL0080).
REMOTE ST ART/STOP CONTACTS
To remotely start and stop the chiller, dry contacts can
be wired in series with the flow switch and CTB1 - terminals 13 to 14. Refer to Figure 5 and unit wiring diagram.
When using the Load Limit feature,
the PWM feature will not function SIMULTANEOUS OPERATION OF
LOAD LIMITING AND TEMPERATURE RESET (PWM INPUT)
CANNOT BE DONE.
FLOW SWITCH INPUT
The flow switch is field wired to CTB1 terminals 13 - 14.
See Figure 5 and unit wiring diagram.
YORK INTERNATIONAL
13
Installation
STANDARD POWER SUPPLY WIRING – (0014 - 0080)
Power Panel
Circuit # 1
1L1
1L2
1L3
*Circuit # 2
2L1
2L2
GRD
See electrical note 9
2L3
GRD
CTB2
2
L
Control Panel
Micropanel
13
CTB1
Field 120-1-60 Micropanel
Power Supply if control
transformer not supplied
Field Unit Power
Supply
Flow Switch
14
LD04483
IT IS POSSIBLE THAT MULTIPLE SOURCES OF POWER CAN BE SUPPLYING
THE UNIT POWER PANEL. TO PREVENT SERIOUS INJURY OR DEATH, THE
TECHNICIAN SHOULD VERIFY THAT NO LETHAL VOLTAGES ARE PRESENT
INSIDE THE P ANEL AFTER DISCONNECTING POWER, PRIOR TO WORKING ON
EQUIPMENT.
THE UNIT EVAPORATOR HEATER USES 120 VAC. DISCONNECTING 120 VAC
POWER FROM THE UNIT, AT OR BELOW FREEZING TEMPERATURES, CAN
RESULT IN DAMAGE TO THE EVAPORATOR AND UNIT AS A RESULT OF THE
CHILLED LIQUID FREEZING.
Electrical Notes and Legend located on Page 18 and 19.
FIG. 2 – MULTI POINT POWER SUPPLY WIRING
14
YORK INTERNATIONAL
FORM 150.62-NM1
OPTIONAL SINGLE POINT POWER SUPPLY WIRING – (0040 - 0080)
Power Panel
1L1
1L3
1L2
See electrical note 9
GRD
Control Panel
2
L
CTB2
Field Unit Power Supply
Micropanel
Flow Switch
14
13
CTB1
Field 120-1-60 Micropanel
Power Supply if control
transformer not supplied
LD04484
1
IT IS POSSIBLE THAT MULTIPLE SOURCES OF POWER CAN BE SUPPLYING
THE UNIT POWER PANEL. TO PREVENT SERIOUS INJURY OR DEATH, THE
TECHNICIAN SHOULD VERIFY THAT NO LETHAL VOLTAGES ARE PRESENT
INSIDE THE P ANEL AFTER DISCONNECTING POWER, PRIOR TO WORKING ON
EQUIPMENT.
THE UNIT EVAPORATOR HEATER USES 120 VAC. DISCONNECTING 120 VAC
POWER FROM THE UNIT, AT OR BELOW FREEZING TEMPERATURES, CAN
RESULT IN DAMAGE TO THE EVAPORATOR AND UNIT AS A RESULT OF THE
CHILLED LIQUID FREEZING.
Electrical Notes and Legend located on Page 18 and 19.
FIG. 3 – OPTIONAL SINGLE POINT POWER SUPPLY WIRING
YORK INTERNATIONAL
15
Installation
OPTIONAL SINGLE-POINT POWER SUPPLY WIRING
N-F DISC SW OR CIRC BKR (0014 - 0080)
Power Panel
N-F Disconnect
Sw. OR Molded
Case Circuit
Bkr.
1L1
1L2
1L3
2
L
GRD
See electrical note 9
CTB2
Field Unit Power
Supply
Control Panel
Micropanel
14
13
CTB1
Field 120-1-60 Micropanel
Power Supply if control
transformer not supplied
Flow Switch
IT IS POSSIBLE THAT MULTIPLE SOURCES OF POWER CAN BE SUPPLYING
THE UNIT POWER PANEL. TO PREVENT SERIOUS INJURY OR DEATH, THE
TECHNICIAN SHOULD VERIFY THAT NO LETHAL VOLTAGES ARE PRESENT
INSIDE THE P ANEL AFTER DISCONNECTING POWER, PRIOR TO WORKING ON
EQUIPMENT.
THE UNIT EVAPORATOR HEATER USES 120 VAC. DISCONNECTING 120 VAC
POWER FROM THE UNIT, AT OR BELOW FREEZING TEMPERATURES, CAN
RESULT IN DAMAGE TO THE EVAPORATOR AND UNIT AS A RESULT OF THE
CHILLED LIQUID FREEZING.
Electrical Notes and Legend located on Page 18 and 19.
LD04485
FIG. 4 – OPTIONAL SINGLE POINT POWER WIRING
16
YORK INTERNATIONAL
CONTROL WIRING
FORM 150.62-NM1
13
14
13
20
13
21
CTB1
FLOW SW
PWM INPUT
LOAD LIMIT INPUT
REMOTE START/STOP
1
LD03819
*
IT IS POSSIBLE THAT MULTIPLE SOURCES OF POWER CAN BE SUPPLYING
THE UNIT POWER PANEL. TO PREVENT SERIOUS INJURY OR DEATH, THE
TECHNICIAN SHOULD VERIFY THAT NO LETHAL VOLTAGES ARE PRESENT
INSIDE THE P ANEL AFTER DISCONNECTING POWER, PRIOR TO WORKING ON
EQUIPMENT.
THE UNIT EVAPORATOR HEATER USES 120 VAC. DISCONNECTING 120 VAC
POWER FROM THE UNIT, AT OR BELOW FREEZING TEMPERATURES, CAN
RESULT IN DAMAGE TO THE EVAPORATOR AND UNIT AS A RESULT OF THE
CHILLED LIQUID FREEZING.
FIG. 5 – CONTROL WIRING
YORK INTERNATIONAL
* Factory wired with optional transformer.
LD03611
17
Installation
ELECTRICAL NOTES
NOTES:
1. Minimum Circuit Ampacity (MCA) is based on 125% of the rated load amps for the largest motor plus 100% of
the rated load amps for all other loads included in the circuit, per N.E.C. Article 430-24. If the Factory Mounted
Control Transformer is provided, add the following to the system MCA values in the electrical tables for the
system supplying power to the optional transformer. -17, add 2.5 amps; -28, add 2.3 amps; -40, add 1.5 amps, 46, add 1.3 amps; -58, add 1 amp.
2. The minimum recommended disconnect switch is based on 115% of the rated load amps for all loads included in
the circuit, per N.E.C. Article 440.
3. Minimum fuse size is based upon 150% of the rated load amps for the largest motor plus 100% of the rated load
amps for all other loads included in the circuit to avoid nuisance trips at start-up due to lock rotor amps. It is not
recommended in applications where brown outs, frequent starting and stopping of the unit, and/or operation at
ambient temperatures in excess of 95 °F is anticipated.
4. Maximum fuse size is based upon 225% of the rated load amps for the largest motor plus 100% of the rated load
amps for all other loads included in the circuit, per N.E.C. Article 440-22.
5. Circuit breakers must be U.L. listed and CSA certified and maximum size is based on 225% of the rated load
amps for the largest motor plus 100% of the rated load amps for all other loads included in the circuit. Exception:
YCA0014 and YCAL0020 must have the optional factory overloads installed to use a standard circuit breaker.
Otherwise, an HACR-type circuit breakers must be used. Maximum HACR circuit breaker rating is based on
225% of the rated load amps for the largest motor plus 100% of the rated load amps for all other loads included
in the circuit.
6. The “INCOMING WIRE RANGE” is the minimum and maximum wire size that can be accommodated by the unit
wiring lugs. The (2) preceding the wire range indicates the number of termination points available per phase of
the wire range specified. Actual wire size and number of wires per phase must be determined based on the
National Electrical Code, using copper connectors only . Field wiring must also comply with local codes.
7. A ground lug is provided for each compressor system to accommodate a field grounding conductor per N.E.C.
Table 250-95. A control circuit grounding lug is also supplied.
8. The supplied disconnect is a “Disconnecting Means” as defined in the N.E.C. 100, and is intended for isolating
the unit for the available power supply to perform maintenance and troubleshooting. This disconnect is not
intended to be a Load Break Device.
9. Field Wiring by others which complies to the National Electrical Code and Local Codes.
18
YORK INTERNATIONAL
ELECTRICAL NOTES
LEGEND
ACR-LINEACROSS THE LINE START
C.B.CIRCUIT BREAKER
D.E.DUAL ELEMENT FUSE
DISC SWDISCONNECT SWITCH
FACT MOUNT CBFACTOR Y MOUNTED CIRCUIT BREAKER
FLAFULL LOAD AMPS
HZHERTZ
MAXMAXIMUM
MCAMINIMUM CIRCUIT AMP ACITY
MINMINIMUM
MIN NFMINIMUM NON FUSED
RLARA TED LOAD AMPS
S.P. WIRESINGLE POINT WIRING
UNIT MTD SERV SW
LRALOCKED ROTOR AMPS
UNIT MOUNTED SERVICE (NON-FUSED DISCONNECT
SWITCH)
FORM 150.62-NM1
1
VOL TAGE CODE
-17 = 200-3-60
-28 = 230-3-60
-40 = 380-3-60
-46 = 460-3-60
-58 = 575-3-60
LEGEND: Field Wiring
Factory Wiring
YORK INTERNATIONAL
19
Installation
ELECTRICAL DA TA
T ABLE 1 – MICROPANEL POWER SUPPLY
UNIT VOLTAGEUNIT VOLTAGECONTROL POWER
MODELS w/o
CONTROL TRANS
-17200-1-6015A10A15A30 A / 240V
MODELS w/
CONTROL TRANS
A. Minimum #14 AWG, 75°C, Copper Recommended
B. Minimum and Maximum Over Current Protection, Dual Element Fuse or Circuit Breaker
-28230-1-6015A10A15A30 A / 240V
-40380-1-6015A10A15A30 A / 480V
-46460-1-6015A10A15A30 A / 480V
-58575-1-6015A10A15A30 A / 600V
115-1-60/5015A10A15A30 A / 240V
MCA
NOTE AMINMAX
OVER CURRENT PROTECTION,
SEE NOTE BNF DISC Sw
IT IS POSSIBLE THAT MULTIPLE SOURCES OF POWER CAN BE SUPPLYING
THE UNIT POWER PANEL. TO PREVENT SERIOUS INJURY OR DEATH, THE
TECHNICIAN SHOULD VERIFY THAT NO LETHAL VOLTAGES ARE PRESENT
INSIDE THE P ANEL AFTER DISCONNECTING POWER, PRIOR TO WORKING ON
EQUIPMENT.
THE UNIT EVAPORATOR HEATER USES 120 VAC. DISCONNECTING 120 VAC
POWER FROM THE UNIT, AT OR BELOW FREEZING TEMPERATURES, CAN
RESULT IN DAMAGE TO THE EVAPORATOR AND UNIT AS A RESULT OF THE
CHILLED LIQUID FREEZING.
20
YORK INTERNATIONAL
ELECTRICAL DATA – STANDARD SINGLE POINT POWER
YCAL0014SC - YCAL0034SC
T ABLE 2 – S TANDARD SINGLE POINT POWER
SINGLE POINT FIELD SUPPLIED WIRINGSYSTEM #1 COMPRESSOR & FAN