York 30 to 50 TR Instruction manual

Installation, Operation & Maintenance Manual - 60 Hz
DMS Saber Series
Air Cooled Packaged Air Conditioners
30 to 50 TR

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Installation, Operation & Maintenance Manual ( IOPCKKS60220510C1)
CONTENTS
GENERAL
Safety considerations............................................................ 3
Inspection ............................................................................ 3
Renewal parts ....................................................................... 3
Product nomenclature........................................................... 4
INSTALLATION
Limitations ........................................................................... 4
Location ................................................................................ 5
Rigging and handling............................................................. 5
Clearances ........................................................................... 5
Ductwork ............................................................................. 5
Fixed outdoor air intake damper........................................... 6
Condensate drain.................................................................. 6
Compressors......................................................................... 7
Filters.................................................................................... 7
Service access ...................................................................... 7
Thermostat .......................................................................... 7
Power and control wiring...................................................... 7
Optional electric heat............................................................ 7
Phasing ................................................................................ 8
Product data ......................................................................... 9
Dimensions and clearances .................................................. 10
Drive and pulley data ............................................................ 11
Electrical data ....................................................................... 12
Fan performance data........................................................... 13
Additional pressure drops ..................................................... 14
Checking supply air cfm ........................................................ 15
SAFETY
Terminology .......................................................................... 15
Operational safety................................................................. 15
Use and Operation................................................................ 16
Adherence to warnings......................................................... 16
Staff training ......................................................................... 16
Use of the unit ...................................................................... 16
Recommended safety practices............................................ 17
Applicable standards of EEC machinery directive ................. 17
OPERATION
Sound power ratings............................................................. 18
Volt free contact ................................................................... 18
Sequence of operations........................................................ 18
Cooling operation errors....................................................... 19
High pressure limit switch..................................................... 19
Low pressure limit switch...................................................... 19
Freezestat ............................................................................. 19
Low ambient cooling............................................................. 19
Safety controls...................................................................... 19
Compressor protection ......................................................... 20
Flash codes........................................................................... 20
Reset .................................................................................... 20
Electric heating sequence of operations............................... 20
Heating operation errors....................................................... 20
START UP
Restart check list................................................................... 20
Operating instructions........................................................... 20
Post start check list............................................................... 20
Shut down............................................................................. 20
Belt drive blower................................................................... 21
TROUBLE SHOOTING
Cooling trouble shooting guide............................................. 21
Unit flash codes .................................................................... 23
MAINTENANCE
Every month.......................................................................... 24
Every three months............................................................... 24
Every six months................................................................... 24
Every twelve months............................................................. 24
Notes .................................................................................... 25

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Installation, Operation & Maintenance Manual ( IOPCKKS60220510C1)
95 1570
GENERAL
YORK®Saber units are single package air conditioners equipped
with optional factory installed electric heaters and designed for
outdoor installation on a rooftop or steel structure.
The units are completely assembled on a rigid base frame. All
piping, refrigerant charge, and electrical wiring is factory installed
and tested. The units require electric power, duct connections and
drain piping connections at the point of installation.
The supplemental electric heaters have nickel-chrome elements
and utilize single point power connection.
SAFETY CONSIDERATIONS
Due to system pressure, moving parts and electrical components,
installation and servicing of air conditioning equipment can be
hazardous. Only qualified, trained, service personnel should install,
repair, maintain or service this equipment.
Observe all precautions in the literature, on labels and tags
accompanying the equipment whenever working on air conditioning
equipment. Be sure to follow all other safety precautions that
apply.
Wear safety glasses and work gloves, and follow all safety codes.
Use a quenching cloth and have a fire extinguisher available for all
brazing operations.
INSPECTION
As soon as a unit is received, it should be inspected for possible
damage during transit. If damage is evident, the extent of the
damage should be noted on the carrier’s freight bill.
RENEWAL PARTS
Referto YORK® USER’S MAINTENANCE andSERVICEINFORMATION
MANUAL. It is strongly suggested that only genuine YORK®Spare
Parts are used to ensure long life, product and operator safety and
efficient working of the unit.
CAUTION
THIS PRODUCT MUST BE INSTALLED IN STRICT COMPLIANCE
WITH THE ENCLOSED INSTALLATION INSTRUCTIONS AND ANY
APPLICABLE LOCAL, STATE, AND NATIONAL CODES INCLUDING,
BUT NOT LIMITED TO, BUILDING, ELECTRICAL, AND MECHANICAL
CODES.
WARNING
IMPROPER INSTALLATION MAY CREATE A CONDITION WHERE
THE OPERATION OF THE PRODUCT COULD CAUSE PERSONAL
INJURY OR PROPERTY DAMAGE.
Installer should pay particular attention to the words :
NOTE, CAUTION and WARNING.
NOTES are intended to clarify or make the installation easier.
CAUTIONS are given to prevent equipment damage.
WARNINGS are given to alert installer that personal injury and/
or equipment damage may result if installation procedure is not
handled properly.
Figure 1: Typical Unit Configuration

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Installation, Operation & Maintenance Manual ( IOPCKKS60220510C1)
PRODUCT NOMENCLATURE
INSTALLATION
Read these instructions before continuing this appliance
installation. This is an outdoor combination heating and cooling
unit. The installer must assure that these instructions are made
available to the consumer and with instructions to retain them for
future reference.
LIMITATIONS
These units must be installed in accordance with the applicable
national and local safety codes. (Refer to Unit Application Data
table).
If components are to be added to a unit to meet local codes, they
are to be installed at the dealer’s and/or the customer’s expense.
Size of unit for proposed installation should be based on heat loss/
heat gain calculation.
DMS-360 DMS-420 DMS-480 DMS-600
220V/3Ph/60Hz
380V/3Ph/60Hz
460V/3Ph/60Hz
Supply Airflow Rate (min/max) cfm 9500/14000 10500/15000 12500/17000 14000/19000
On-Coil Wet Bulb Temperature (min/max) °F
Ambient Air Temperature (min/max) °F
Voltage Variation (min/max)
Unit Model Number
57/72
50/125 (30/125 with Low Ambient Option)
180/253
342/418
414/506
Table 1: Unit Application Data

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Installation, Operation & Maintenance Manual ( IOPCKKS60220510C1)
LOCATION
Use the following guidelines to select a suitable location for these
units :
1. Unit are designed for outdoor installation only.
2. Condenser coils must have an unlimited supply of air.
3. Where a choice of location is possible, position the unit on
either north or east side of building.
4. For ground level installation, use a level concrete slab. The
length and width should be at least 6 inches greater than the
unit base rails. Do not tie slab to the building foundation.
5. Roof structures must be able to support the weight of the unit
and its options and/or accessories. Unit must be installed on
a solid level roof curb.
6. Maintain level tolerance to 1/2 inch maximum across the
entire length or width of the unit.
RIGGING AND HANDLING
Exercise care when moving the unit. Do not remove any packaging
until the unit is near the place of installation. Rig the unit by
attaching chain or cable slings to the round lifting holes provided
in the base rails. Spreaders, whose length exceeds the largest
dimension across the unit, MUST BE USED. Refer to Figure 2. Units
may also be moved or lifted with a forklift, from the side only,
provided that an accessory skid is used.
LENGTH OF FORKS MUST BE A MINIMUM OF 90”. Refer to the
Product Data Table 5 for unit weights.
Figure 2: Typical Rigging
WARNING
BEFORE LIFTING A UNIT, MAKE SURE THAT ALL PANELS
ARE IN PLACE AND THAT ITS WEIGHT IS DISTRIBUTED
EQUALLY ON ALL CABLES SO IT WILL LIFT EVENLY
CLEARANCES
All units require certain clearances for proper operation and
service. Installer must make provisions for adequate ventilation
air in accordance with applicable provisions of the local building
codes. Refer to Dimensions and Clearances. Refer Figure 8 for the
clearances required for servicing, and proper unit operation.
WARNING
DO NOT PERMIT OVERHANGING STRUCTURES OR
SHRUBS TO OBSTRUCT OUTDOOR AIR DISCHARGE
OUTLET.
DUCTWORK
A closed return duct system should be used. This should not
preclude use of outdoor fresh air intake.
The supply and return air duct connections at the unit should
be made with flexible joints to minimize noise. The supply and
return air duct systems should be designed for the CFM and static
requirements of the job. They should NOT besized to match the
dimensions of the duct connections on the unit.
WARNING
WHEN FASTENING DUCTWORK TO SIDE DUCT FLANGES
ON UNIT, INSERT SCREWS THROUGH DUCT FLANGES
ONLY. DO NOT INSERT SCREWS THROUGH CASING.
OUTDOOR DUCTWORK MUST BE INSULATED AND
WATERPROOFED.
Refer to Dimensions and Clearances Figure 7 for information
concerning supply and return air duct openings.
FIXED OUTDOOR AIR INTAKE DAMPER
This damper is shipped inside the return air compartment. It is
completely assembled and ready for installation. Refer to the
Fixed Outdoor Damper Figure 3.
Gasketing and mounting screws are provided in a parts bag.
Adjusting the damper to the desired air flow may be done after
installation by opening or closing dampers with handle.
Damper provides maximum of 25% fresh air when fully opened.

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Installation, Operation & Maintenance Manual ( IOPCKKS60220510C1)
Figure 3: Fixed Outdoor Damper
CONDENSATE DRAIN
Plumbing must conform to local codes. Use a
sealing compound on male pipe threads. Install
a condensate drain line from the one-inch FPT
female connection on the unit to an open drain.
NOTE:
The condensate drain operates in a negative
pressure in the cabinet. The condensate
drain line MUST be trapped to provide proper
drainage. See Figure 4.
Figure 4: Recommended Drain Pipe
Figure 5: Loading Points
ABCDEFGHTotal
Lbs         
Kg         
Lbs         
Kg         
Lbs         
Kg         
Lbs         
Kg         
Model
DMS360
DMS420
DMS480
DMS600

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Installation, Operation & Maintenance Manual ( IOPCKKS60220510C1)
COMPRESSORS
Units are shipped with factory adjusted compressor mountings
and ready for operation.
CAUTION
DO NOT LOOSEN COMPRESSOR MOUNTING BOLTS.
REMOVE COMPRESSOR SHIPPING BRACKETS BEFORE
START-UP.
FILTERS
Two inch filters can be supplied with each unit. Filters must always
be installed ahead of the evaporator coil and must be kept clean
or replaced with same size and type. Dirty filters will reduce
the capacity of the unit and will result in frosted coils or safety
shutdown. Minimum filter area and required sizes are shown in
Product Data Table 4.
SERVICE ACCESS
The following removable panels provide access to all serviceable
components :
t Compressor compartment
t Electric Heat compartment
t Blower compartment
t Main control box
t Filter compartment
Refer to the Dimensions and Clearances Figure 7 for location of
these access panels.
THERMOSTAT
4 Stage Cooling
The room thermostat should be located on an inside
wallapproximately 56 inches above the floor where it will not
besubject to drafts, sun exposure or heat from electrical fixtures
or appliances. Follow manufacturers instructions enclosed with
thermostat for general installation procedure. A minimum of seven
color coded insulated wires (#18 AWG) should be used to connect
thermostat to unit.
POWER AND CONTROL WIRING
Field wiring to the unit must conform to provisions of the National
Electrical Code and/or local ordinances. The unit must be electrically
grounded in accordance with NEC and/or local codes.
Voltage tolerances, which must be maintained at the compressor
terminals, during starting and running conditions, are indicated on
the unit Rating Plate and the Unit Application Data table.
A fused disconnect switch should be field provided based on the
tabulated rating, with a short circuit capacity of 10K or more, for
the unit. The switch must be separate from all other circuits. Wire
entry at knockout openings require conduit fittings to comply with
local codes. Refer to the Dimensions and Clearances Figures 8 for
installation location.
If any of the wire supplied with the unit must be replaced,
replacement wire must be of the type shown on the wiring diagram
and the same minimum gauge as the replaced wire.
Electrical line must be sized properly to carry the load. Use copper
conductors only. Each unit must be wired with a separate branch
circuit fed directly from the meter panel and properly fused.
Emergency stop button should be field installed as per wiring
diagram. The activator should be red in colour with a yellow outline
background, and should be easily accessible. The device should
be self latching type and contacts must be of positive opening
operation, certified to EN60947 - 5 - 1.
CAUTION
WHEN CONNECTING ELECTRICAL POWER AND CONTROL
WIRING TO THE UNIT, WATERPROOF TYPE CONNECTORS
MUST BE USED SO THAT WATER OR MOISTURE
CANNOT BE DRAWN INTO THE UNIT DURING NORMAL
OPERATION. THE ABOVE WATERPROOFING CONDITIONS
WILL ALSO APPLY WHEN INSTALLING A FIELD SUPPLIED
DISCONNECT SWITCH.
Refer to Typical Wiring Diagram, Figure 7 and to the appropriate unit
wiring diagram for control circuit and power wiring information.
Wire Size Maximum Length (1)
18 AWG 150 feet
From the unit to the thermostat and back to the unit
Table 2: Control Wire Sizes
OPTIONAL ELECTRIC HEAT
The factory installed heaters are wired for single point power
supply. Power supply need only be brought into the singlepoint
terminal block and thermostat wiring to the low voltage terminal
strip located in the upper portion of the unit control box.
These heaters are located within the supply air chamber.Refer
to Figure 8 for access panel location. Fuses are supplied by the
factory. Refer to Table 3 for minimum CFM limitations and to Table
5 for electrical data.
Table 3: Minimum CFM Limitation

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Installation, Operation & Maintenance Manual ( IOPCKKS60220510C1)
PHASING
YORK Saber units are properly phased at the factory. Check for
proper compressor rotation. If the blower or compressors rotate
in the wrong direction at start up, the electrical connection to the
unit is mis-phased. Change the incoming line connection phasing
to obtain proper rotation. (Scroll compressors operate in only
one direction. If the scroll is drawing low amperage, has similar
suction and discharge pressures, or producing a high noise level,
the scroll is mis-phased).
CAUTION
SCROLL COMPRESSORS REQUIRE PROPER ROTATION TO
OPERATE CORRECTLY. UNITS ARE PROPERLY PHASED
AT THE FACTORY. DO NOT CHANGE THE INTERNAL
WIRING TO MAKE THE BLOWER, CONDENSER FANS, OR
COMPRESSOR ROTATE CORRECTLY.
FIGURE 6 : Typical Field Wiring Schematic

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Installation, Operation & Maintenance Manual ( IOPCKKS60220510C1)
PRODUCT DATA
Table 4: Production Data
DMS 360 420 480 600
Btuh/W 10.3 10.9 8.7 8.7
MBh (kW) 344.6 ( 101 ) 386.3 ( 113.2 ) 462.9 ( 135.7 ) 588 ( 172.3 )
hp (kW) 30.6 ( 22.8 ) 31.5 ( 23.5 ) 50.9 ( 38 ) 69.7 ( 52 )
122.7 ( 36 ) 122.7 ( 36 ) 122.7 ( 36 ) 122.7 ( 36 )
184.1 ( 54 ) 184.1 ( 54 ) 184.1 ( 54 ) 184.1 ( 54 )
fpi (mm) 10 ( 2.5 ) 14 ( 3.5 ) 14 ( 3.5 ) 14 ( 3.5 )
ft² (m²) 31.7 ( 2.9 ) 31.7 ( 2.9 ) 31.7 ( 2.9 ) 38 (3.5 )
fpi (mm) 16 ( 4.0 ) 12 ( 2.1 ) 12 ( 2.1 ) 12 ( 2.1 )
ft² (m²) 50.7 ( 4.7 ) 50.7 ( 4.7 ) 50.7 ( 4.7 ) 50.7 ( 4.7 )
2222
std 10 ( 7.5 ) 10 ( 7.5 ) 15 ( 11 ) 15 ( 11 )
xtd 15 ( 11 ) 15 ( 11 ) 20 ( 50 ) 20 ( 15 )
3444
hp (kW) 1.5 ( 1.1 ) 1.5 ( 1.1 ) 1.5 ( 1.1 ) 1.5 ( 1.1 )
3444
3334
3334
lbs (kgs) 13.2 ( 6 ) 24.2 ( 11 ) 22 ( 10 ) 15.4 ( 7 )
Weights lbs (Kg) 3520 ( 1600 ) 3630 ( 1650 ) 3720 ( 1691 ) 4150 ( 1886 )
Basic Unit
Ratings @ ARI Conditions
Heating Capacities
Dimensions
Motor size
Filters
Refrigerant
Height
# of Comp.s
Hermetic Scroll
6 Pole, Class F Insulation, Totally Enclosed Fan Cooled,IP 54, 1100 rpm
MBh(kW)
EER
Capacity
Compressor
Power Input
Option 1
Option 2
Enhanced Copper /Aluminium
R-22
Quantity
H X L X D- Qty
Type
No of Circuits
inches (mm)Length
Width
Charge / Cir
4 Blade heavyduty PropellerFan
4 Pole, Class F Insulation, Totally Enclosed Fan Cooled,IP 54, 1700 rpm
Forward Curved Centrifugal - DIDW
Enhanced Copper /Aluminium
Model
Fins
Area
Condenser Fan & Motor
Blower Fan & Motor
Motor
Size
Type
Type
Quantity
Motor Type
Evaporator Coil
Condenser Coil
Compressor
Tube / Fins
Tube
Area
69.9 (1776)
88 (2235)
205 (5207)
24 x 24 x 2 (610 x 610 x50 ) - 6#
H X L X D- Qty
Fins
Fan Type
Fan Qty
Motor Type
hp (kW)

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Installation, Operation & Maintenance Manual ( IOPCKKS60220510C1)
DIMENSIIONAL DATA - DMS 360, 420, 480, & 600
Notes :
1. DMS 600 with 4 condenser fans.
2. For economizer option, add 800 mm to the unit length.
3. For bag filter option, add 800 mm to the unit length.
4. When selecting the option of UV lamps, add 800 mm to
the unit length.
FIGURE 7 : Dimensional Data and Clearances