York H1DS048 User manual

GENERAL
This instruction covers the installation of the following Stellar
ULTRA high efficiency condensing units.
NOMENCLATURE
Theoutdoor condensing units aredesignedto be installedwith
corresponding variable speed air handlers and a correspond-
ing coil with sweat connect lines. Each unit is factory charged
withrefrigerantsufficientforthesmallestindoorevaporatorcoil
plus 15 feet of field supplied vapor and liquid lines. Abalanced
port hard shut-off TXV kit must be used for optimum system
performance.
SAFETY
Use this instruction in conjunction with the instruction for the
appropriate indoor evaporator coil, variable speed airhandler and
other accessories. Read all instructions before installing the unit.
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 the installer that personal injury
and/or equipment damage may result ifinstallationprocedures
are not handled properly.
INSPECTION
Assoonasaunitisreceived,itshouldbeinspectedforpossible
damage during transit. If damage is evident, the extent of the
damage should be noted onthe carrier’sfreightbill. Aseparate
request for inspection by the carrier’s agent should be made in
writing. See Form 50.15-NM for more information.
LIMITATIONS
The unitshould be installed in accordance with all nationaland
local safety codes and the limitations listed below:
1. Limitations for the indoor unit, coil and appropriate acces-
sories must also be observed.
2. This unit
should not be installed with a single speed air
handler or furnace system.
3. The outdoor unit must notbe installed with any ductwork in
the air stream. The outdoorfan is the propeller type and is
not designed to operate against any additional external
static pressure.
4. The unit should not be operated at outdoor temperatures
below 60 °F.
The unit is not designed to operate with a
low ambient kit. Do not modify the control system to
operate with any type of low ambient kit.
5. Indoor evaporator coil orifice
must be removed prior to
the installation of a factory supplied balanced port TXV kit.
S
TELLAR ULTRA
CO
NDEN
S
IN
G
UNIT
S
SPLIT-SYSTEM COOLING
3 and 5 TONS
Supersedes: 550.37-N1Y (793)
550.37-N1Y (594)
035-10821
MODELS H1DS036, H1DS048 and H1DS060
H1DS036S06
H1DS048S06
H1DS060S06
Voltage Code
Refrigerant Line Connections
Nominal Cooling Capacity
H036 S061 DS
Product Category
Product Generation
Product Identifier
H = Condensing Unit
1 = Design Level
DS = 16.00 SEER Condensing Unit
036=36,000 BTUH 048=48,000 BTUH
060=60,000 BTUH
S = Sweat-Connect
06 = 208/230-1-60
®
INSTALLATION INSTRUCTION
CAUTION
THE ENCLOSED INSTALLATION INSTRUCTIONS AND ANYAPPLICABLE
LOCAL,STATE,AND NATIONAL CODES INCLUDING, BUT NOT LIMITED
TO,BUILDING,ELECTRICAL,AND MECHANICAL CODES.
THIS PRODUCT MUST BE INSTALLED IN STRICT COMPLIANCE WITH
WARNING
OPERATION OF THE PRODUCT COULD CAUSE PERSONAL INJURY
OR PROPERTY DAMAGE.
INCORRECT INSTALLATION MAY CREATE A CONDITION WHERE THE

THERMOSTAT
NEC CLASS 1
WIRING
WEATHERPROOF
DISCONNECT
SWITCH
NOTE: ALL OUTDOOR WIRING MUST
BE WEATHERPROOF
TO POWER
SUPPLY
12" REAR AND
SIDES
CLEARANCE
REQUIRED
TO
BLOWER
MOTOR
RELAY
TO
COIL
SEAL OPENING(S) WITH PERMAGUM OR EQUIVALENT
24" SERVICE
ACCESS CLEARANCE
REQUIRED
48" OVERHEAD
CLEARANCE
REQUIRED
NEC CLASS 2
WIRING
Sit unit on
rubber
elevator
grommets
to reduce
noise and
allow for
proper
drainage.
FIGURE 1- TYPICALINSTALLATION
MODEL H1DS... 036 048 060
UNIT SUPPLY VOLTAGE 208/230-1-60
NORMAL VOLTAGE RANGE1 187 to 252
MIN.CIRCUITAMPACITY 20 25.9 30.5
MAX. OVERCURRENT DEVICE AMPS 225 35 40
COMPRESSOR #1 AMPS
(Lead Compressor) RATEDLOAD 8.3 8.3 10.9
LOCKED ROTOR 48 48 64
COMPRESSOR # 2 AMPS
(Follower Compressor) RATEDLOAD 9.0 13.5 15.1
LOCKEDROTOR 48 68 81.0
CRANKCASE HEATER YES YES YES
FANMOTORAMPS RATEDLOAD 0.7 0.7 0.7
LOCKEDROTOR 0.8 0.8 0.8
MIN.FIELDWIRESIZEAWG
60°C COPPER CONDUCTORS 10 10 8
MAX. WIRE LENGTH FEET
BASED ON 3% VOLTAGE DROP 208V 125 100 100
230V 140 115 110
FAN DIAMETER INCHES 24 24 24
FAN MOTOR RATEDHP 1/10 1/10 1/10 NOMINALRPM 825 825 825
NOMINALCFM 2800 2800 2700
COIL FACEAREASQ.FT. 23.5 23.5 23.5 ROWS DEEP 1 1 2
FIN/INCH 20 20 16
LIQUIDLINEOD 3/8 3/8 3/8
VAPORLINEOD 7/8 7/8 7/8
OPERATINGWEIGHTLBS. 277 282 340
1Utilization range “A” in accordance with ARI standard 110.
2Dual element fuses or HACR circuit breaker.
TABLE 1 - PHYSICAL AND ELECTRICAL DATA
550.37-N1Y
2Central Environmental Systems

LOCATION
Before starting the installation, select and check the suitability
of the location for both the indoor and outdoor unit.Observe all
limitations and clearance requirements.
Theoutdoorunitmusthavesufficientclearanceforairentrance
to the condenser coil, for air discharge and for service access.
See Figure 1.
If the unit is to be installed on a hot sun exposed roof or a
black-toppedgroundarea,theunitshouldberaisedsufficiently
above the roof or ground to avoid taking the accumulated layer
of hot air into the outdoor unit.
Provide an adequate structural support.
GROUND INSTALLATION
The unit may be installed at ground level on a solid base that
will notshiftor settle,causing strainon therefrigerantlinesand
possible leaks. Maintain the clearances shown in Figure 1 and
install the unit in a level position. Isolate the base from the
structure to avoid noise or vibration transmission.
Isolatetheunitfromraingutterstoavoidany possiblewashout
of the foundation.
Normal operating sound levels may be objectionable if the unit
is placed directly under windows of certain rooms (bedrooms,
study, etc.).
ROOF INSTALLATION
When installing units on a roof, the structure must be capable
ofsupportingthetotalweightoftheunit,includingapad,lintels,
rails, etc., which should be used to minimize the transmission
of sound or vibration into the conditioned space.
UNIT PLACEMENT
1. Provide a base in the pre-determined location.
2. Removetheshippingcartonandinspectforpossibledamage.
3. Compressor tie-down bolts should remain tightened.
4. Position the unit on the base provided.
5. Sit unit on the (4) rubber elevating grommets provided with
the unit. These should be positioned as shown in Figure 2
to reduce noise and allow for proper drainage.
6. Make a hole(s) in the structure wall large enough to acco-
modate the insulated vapor line, theliquid line and the wiring.
TXV INSTALLATION
This condensing unit requires the installation of a thermal
expansion valve. The TXV controls the superheat of the
refrigerant at the outlet of the evaporator coil, ensuring the
proper refrigerant temperature at the suction of compressor.
Following are the basic steps for installing the TXV. For detail
instructions, referto theInstallationInstructionsaccompanying
the TXV kit.
Install TXV kit as follows:
1. Position the interconnecting refrigerant lines for proper
installation to the outdoor condensing unit and the indoor
evaporator coil, but do not make any connections at this
time.
WARNING:The evaporator coil is under 15 psig pressure.
2. Crack open the liquid line fitting of the indoor coil torelieve
pressure. This fitting is left handed thread. Turn clockwise
to open.
3. Remove the fitting.
4. Using a small diameter wire, remove the orifice from the
other half of the liquid line fitting.
NOTE: Orificeis notusedwhentheTXVassemblyisinstalled.
5. Reinstall the liquid line fitting hand tight and turn an addi-
tional 1/8 turn to seal well.
6. Insert and braze the TXVoutletconnectionto theliquid line
flare fitting mounted on the evaporator coil.
7. Connect external equalizer tube to the vapor line.
8. Position sensing bulb on horizontal portion of vapor line.
Secure usingthe clamps furnishedin the kit. See Figure 3.
for positioning of the bulb. Insulate bulb after installation.
RUBBER
ELEVATING
GROMMETS
(4)
UNIT
BASE
PAN
Note: Do Not block
drainage holes with
grommets.
FIGURE 2 - POSITIONING GROMMETS FIGURE 3 - CORRECT BULB LOCATIONS
7/8" VAPOR LINE
ROTATE BULB TO KEEP
TAIL AT BOTTOM
SENSING
BULB
10 O'CLOCK 2 O'CLOCK
OR
END VIEW
550.37-N1Y
Central Environmental Systems 3

PIPING CONNECTIONS
The outdoor condensing unit may be connected to the indoor
evaporator coil using field supplied refrigerant grade copper
tubing thatis internally clean and dry. Units shouldbeinstalled
only with the tubing sizes for approved system combinations
as specified in Table 5. The charge given is applicable for total
tubinglengthsupto15feet.SeeApplicationDataForm690.01-
AD1V for installing tubing of longer lengths and elevation
differences.
NOTE: Using a larger than specified line size could result in
oil return problems. Using too small a line will result in
loss of capacity and other problems caused by insuffi-
cient refrigerant flow. Slope horizontal vapor lines at
least 1" every 20 feet toward the outdoor unit to
facilitate proper oil return.
PRECAUTIONS DURING LINE INSTALLATION
1. Install the lines with as few bends as possible. Care must
be taken not to damage the couplings or kink the tubing.
Use clean hard drawn copper tubing where no appreciable
amount of bending around obstruction is necessary. If soft
copper must be used, care must be taken to avoid sharp
bends which may cause a restriction.
2. The lines should be installed so that they will not obstruct
service access to the coil, air handling system or filter.
3. Care must also be taken to isolate the refrigerant lines to
minimize noise transmission from the equipment to the struc-
ture.
4. The vapor line must be insulated with a minimum of 1/2"
foam rubber insulation (Arm-A-Flex or equivalent). Liquid
lines that will be exposed to direct sunlight and/or high
temperatures must also be insulated.
5. Tape and suspend therefrigerantlines as shown.DO NOT
allow metal-to metal contact. See Figure 4.
6. Use PVC piping as a conduit for all underground installa-
tions as shown in Figure 5. Buried lines should be kept as
short as possible to minimize the build up of liquid refriger-
ant in the vapor line during long periods of shutdown.
7. Pack fiber glass insulation and a sealing material such as
permagum around refrigerantlines where they penetrate a
wall to reduce vibration and to retain some flexibility.
8. See Form 690.01-AD1V for additional piping information.
PRECAUTIONS DURING BRAZING OF LINES
All outdoor unit and evaporatorcoil connections are copper-to-
copper and shouldbe brazed with a phosphorous-copperalloy
material such as Silfos-5 or equivalent. DO NOT use soft
solder.
CAUTION: Dry nitrogen should always be supplied through the
tubing while itis being brazed, because the tempera-
turerequiredishighenoughtocauseoxidationofthe
copper unless an inert atmosphere is provided. The
flow of dry nitrogen should continueuntil the jointhas
cooled. Always use a pressure regulator and safety
valve to insure that only low pressure dry nitrogen is
introduced into the tubing. Only a small flow is nec-
essary to displace air and prevent oxidation.
The outdoor units have re-usable service valves on both the
liquid and vapor connections. The total system refrigerant
charge is retained within the outdoor unit during shipping and
installation. The re-usable service valves are provided to
evacuate and charge per this instruction.
Serious service problems can be avoided by taking adequate
precautions to assure an internally clean and dry system.
PRECAUTIONS DURING BRAZING ANGLE VALVE
Precautions should be taken to prevent heat damage to angle
valve by wrapping a wet rag around it as shown in Figure 6.
Also,protectallpaintedsurfacesandinsulationduringbrazing.
After brazing - cool joint with wet rag.
WARNING:Thisisnotabackseatingvalve.Theserviceaccess
port has a valve core. Opening or closing valve
does not close service access port.
Valve can be opened by removing the plunger cap(See Figure
7) and fully inserting a hex wrench into the stem and backing
out counter-clockwise until valve stem just touches retaining ring.
FIGURE 4 - TUBING HANGER
LIQUID
LINE
TAPE
SHEET
METAL
HANGER
INSULATED
VAPOR LINE
TO INDOOR COIL TO OUTDOOR UNIT
LIQUID LINE
CAP
PVC
CONDUIT
INSULATED
VAPOR LINE
FIGURE 5 - UNDERGROUND INSTALLATION
550.37-N1Y
4Central Environmental Systems

CAUTION: If visual verification of the valve stem reaching the
retaining ring is impossible, stop backing out the
valve stem when the slightest increase in resis-
tance is felt. Because of the small size and there-
fore the reduced resistance, back out the liquid
valve
5 turns maximum to prevent going past the
retaining ring.
WARNING: If the valve stem is backed out past the retaining
ring, the O’ring can be damaged causing leakage
or system pressure could force the valve stem out
of the valve body possibly causing personal injury.
In the event the retaining ring is missing, do not
attempt to open the valve.
Replaceplungercapfingertight,thentightenanadditional1/12
turn (1/2 hex flat). Cap must be replaced to prevent leaks.
LINE CONNECTION
Connect the refrigerant lines using the following procedure:
1. RemovethecapandSchradercorefromboththeliquidand
vaporanglevalveserviceportsattheoutdoorunit.Connect
low pressure nitrogen to the liquid line service port.
2. Braze the liquid line to the liquid valve at the outdoor unit.
Be sure to wrap the valve body with a wet rag. Allow the
nitrogen to continue flowing.
3. Carefully remove the rubber plugs from the evaporator
liquid and vapor connections.
CAUTION: The evaporator is pressurized.
4. Brazetheliquidlinetotheevaporatorliquidconnection.The
nitrogenshouldnowbeflowingthroughtheevaporatorcoil.
5. Slide the grommet away from the vapor connection at the
coil. Braze the vapor line to the evaporator vapor connec-
tion. After the connection has cooled, slide the grommet
back into original position.
6. Protect the vapor valve with a wet rag and braze the vapor
line connection. The nitrogen flow should be exiting the
system from the vapor service port connection. After this
connection has cooled, remove the nitrogen source from
the liquid fitting service port.
7. Evacuate the vapor line, evaporator and the liquid line, to
1000 microns or less.
8. Leak testall refrigerant piping connections including the serv-
ice port flare caps to be sure they are leak tight. DO NOT
OVERTIGHTEN (between 40 and 60 inch - lbs. maximum).
NOTE: Do not use the system refrigerant in the outdoor unit
to purge or leak test.
9. Do not remove the flare caps from the service ports except
when necessary for servicing the system.
CAUTION: Do not connect manifold gauges unless trouble is
suspected.Approximately 3/4 ounce of refrigerant
will be lost each time a standard manifold gauge is
connected.
10.Release the refrigerant charge into the system. Open both
the liquid and vapor valves by removing the plunger cap
and with an allen wrench back out counter-clockwise until
valve stem just touches retaining ring. See Figure 7. Re-
lease the refrigerant charge into the system. See "Precau-
tions During Brazing Angle Valves" on page 4 and 5.
11. If the refrigerant tubing, indoor evaporator coil or outdoor
condensing unit has developed a leak during shipment, or
was, for any other reason, opened to the atmosphere for
more than four (4)minutes, it is necessary to evacuate the
systemdown toatleast 1000 microns to eliminatecontami-
nation and moisture in the system.
If a leak is suspected, leak test to locate theleak. Toverify
the leak, close the valve to the vacuum pump suction to
isolate the pump and hold the system under vacuum. If the
micron gauge indicates a steady and continuous rise after
afewminutes,it’sanindicationofaleak.Iftheguageshows
a rise,then levels offafter a few minutes and remains fairly
constant, its an indication that the system is leak free, but
still contains moisture and may require further evacuation
if the reading is above 1000 microns.
WARNING:Never attempt to repair any brazed connections
whilethesystemisunderpressure.Personalinjury
could result.
See "System Start Up" section for checking and recording
system charge.
FIGURE 6 - HEAT PROTECTION
ANGLE
VALVE
PLUNGER
CAP
FIGURE 7 - REMOVING PLUNGER CAP
550.37-N1Y
Central Environmental Systems 5

ELECTRICAL CONNECTIONS
GENERAL INFORMATION & GROUNDING
Check the electrical supply to be sure that it meets the values
specified on the unit nameplate and wiring label.
Power wiring, control (low voltage) wiring, disconnect switches
and overcurrent protection to be supplied by the installer. See
Table 1 for proper sizes. Wire size should be at least equal to
or greater than the size shown in Table 1.
CAUTION: All field wiring must USE COPPER CONDUC-
TORS ONLY and be in accordance with Local,
National Fire, Safety & Electrical Codes. This
unit must be grounded with a separate ground
wire in accordance with the above codes.
The complete connection diagram and schematic wiring label
is located on the inside surface of the unitelectrical box cover.
Field wiring is also shown in Figure 1.
NOTE: The wires for the operation of the leadcompressor are
solid in color. For differentiation, the wires of the fol-
lower compressor are basically the same in color, but
striped.
POWER WIRING
1. Install the proper size weatherproof disconnect switch out-
doors and within sight of the unit.
2. Run power wiring from the disconnect switch to the unit.
3. Remove the control box cover to gain access to the unit
wiring. Route wires from disconnect through power wiring
opening provided and into the unit control box as shown in
Figure 8.
4. Install the proper size time-delay fuses or circuit breaker,
and make the power supply connections.
5. Energize the crankcase heater to save time by preheating
the compressor oil while the remaining installation is com-
pleted.
ACCESSORY WIRING
Theelectricalaccessoriesavailableforthisunitareatwostage
cooling thermostat and an optional De-humidification Control.
Refertothe individualinstructions packagedwiththe accesso-
ries for installation.
THERMOSTAT MOUNTING / WIRING
This condensing unit must be installed with the factory recom-
mended thermostat, 2ET04700224 or any conventional two-
stage cooling thermostat. The difference between the two
stages of a typical two-stage thermostat is 2 - 2.5 °F.
The thermostat should be located about 5 ft. above the floor,
where it will be exposed to normal room air circulation. Do not
place it on an outside wall or where itis exposed to the radiant
effect from exposed glass or appliances, drafts from outside
doors or supply air grilles.
Afterthethermostatismounted,routethe24-voltcontrolwiring
(NEC Class 2) from the thermostat to the indoor varible speed
air handler and outdoor unit. Route the control wiring into the
grommetted hole in the bottom of control box of the outdoor
unit. Using wire nuts connect to leads provided in unit control
box as per Figure 8.
Interconnecting control wiring must be a minimum of No. 18
AWGcolorcodedinsulatedwires.Ifwirelengthsincreasemore
than 90 feet, use No. 16 AWG wires, to prevent excessive
voltage drop.
NOTE: To eliminate erratic operation, seal the hole in the wall
at the thermostat with permagum or equivalent to
prevent air drafts affecting the anticipators in the
thermostat.
DE-HUMIDIFICATION CONTROL
A de-humidification control accessory 2HU06700124 may be
required in high humidity areas. This control provides cooling
at a reduced air flow, lowering evaporator temperature and
increasing latent capacity. To install, refer to instructions pack-
aged with the accessory. Prior to the installation of the de-hu-
midification control, the jumper across the de-humidification
control terminals on the indoor variable speed air handler
terminal board must be removed. See Figure 10. Refer to
Figure 9 for wiring details.
During first or second stage cooling, if the relative humidity in
the space is higher than the desired set point of the de-humidi-
fication control, thevariable speedblower motor will operate at
a lower speed until thede-humidification control is satisfied. A
40 - 60% relative humidity level is recommended to achieve
optimum comfort.
NOTE: If a de-humidification control is installed, it is recom-
mended that a minimum air flow of 325 cfm/ton be
supplied at all times.
550.37-N1Y
6Central Environmental Systems

All outdoor wiring must be
weatherproof. Use copper
conductors only.
POWER WIRING
208/230-1-60
CONTACTOR
GRD.
SCREW
M2
T1
L1
L2
OUTDOOR UNIT
T2
CONTACTOR
M1
T1
L1
L2
T2
TYPICAL
TWO STAGE
COOLING
THERMOSTAT
MUST BE
USED
POWER
CONTROL
FACTORY
WIRE NUT
BRN
YEL
BLU
BLK
INDOOR
VARIABLE SPEED AIR
HANDLER / FURNACE
TERMINAL BOARD
RED
W1
G
W2
C
R
Y2
Y1
Y
G
W2
BK
X
O
C
R
Y2
Y1
C
R
Y2
Y1
Y2 OUT
W/W1 DE-HUMIDIFICATION
CONTROL CONNECTION
(JUMPER MUST BE REMOVED)
FOR ELECTRIC HEAT ONLY
(CLASS 2 WIRING)
(CLASS 1 WIRING)
FIGURE 8 - TYPICAL FIELD WIRING
POWER
WIRING
CONTROL
WIRING
COOLING
WITH
DE-HUMIDIFICATION
CONTROL
FIGURE 9 - TYPICAL FIELD WIRING WITH
POWER WIRING
208/230-1-60
CONTACTOR
GRD.
SCREW
M2
T1
L1
L2
OUTDOOR UNIT
T2
CONTACTOR
M1
T1
L1
L2
T2
TYPICAL
TWO STAGE
COOLING
THERMOSTAT
MUST BE
USED
POWER
CONTROL
FACTORY
WIRE NUT
BRN
YEL
BLU
BLK
INDOOR
VARIABLE SPEED AIR
HANDLER / FURNACE
TERMINAL BOARD
RED
W1
G
W2
C
R
Y2
Y1
Y
G
W2
BK
X
O
C
R
Y2
Y1
C
R
Y2
Y1
Y2 OUT
W/W1 FOR ELECTRIC HEAT ONLY
(CLASS 2 WIRING)
(CLASS 1 WIRING)
COOLING
ONLY
ALLFIELD WIRING TO BE IN ACCORDANCE WITH NATIONALELECTRICAL CODE (NEC) AND/OR LOCAL CODES.
DE-HUMIDIFICATION CONTROL
550.37-N1Y
Central Environmental Systems 7

SPEED TAP SELECTION FOR VARIABLE SPEED
AIR HANDLERS
The variable speed air handler motor’s speed tappings must
be adjusted from the factory settings for the required outdoor
condensing unit as shown in Table 2. Atypical variable speed
airhandler(N1VS/N2VS)connectorboardconfigurationshow-
ing the various speed taps is shown in Figure 10. Refer to
variablespeedairhandlerinstallationinstructionsforadditional
details, regarding the CFM for the corresponding speed taps.
By selecting the speed taps shown in Table 2, the air handler
will deliver the rated CFM when both (lead and follower)
compressors are running, and the air handler motor will oper-
ate at a lower speed automatically when only the lead com-
pressor is running. The variable speed motor used in this air
handler is programmed to automatically adjust to the lower
speed when there is a call for first stage (Y1) cooling from the
two stage cooling thermostat.
INDOOR
VARIABLE
SPEED
AIR
HANDLER
INDOOR
EVAP.
COIL
CONDENSING UNITS
H*DS036 H*DS048 H*DS060
COOL
TAP ADJ TAP DELAY PROFILE COOL TAP ADJ TAP DELAY PROFILE COOL TAP ADJ TAP DELAY PROFILE
N1VSD14 G/HC036 Jumper
at "B" NO Jumper Jumper at "C" NA NA NA NA NA NA
G/HC042
N2VSD20 G/HC048 Jumper
at "A" NO Jumper Jumper at "C" Jumper at "B" NO Jumper Jumper at "C" NA NA NA
G/HC060 Jumper
at "A" Jumper at "C" Jumper at "C" Jumper at "C" NO Jumper Jumper at "C" Jumper at "B" Jumper at "C" Jumper at "C"
NOTE: For ARI testing requirements, adjust the delay profile in "Test Mode". Refer to Installation Instructions for N1VS variable speed
air handlers for additional details if necessary.
NA= Not Applicable.
TABLE 2 - RECOMMENDED SPEED TAP SELECTION
FIGURE 10 - N1VS/N2VS Connector Board
SCREW
TERMINAL
BOARD
DE-HUMIDIFI
CATION
CONTROL
ACCESSORY
JUMPER
DELAY
PROFILE TAP
BLOWER MOTOR
INTERFACE HARNESS
CONNECTS HERE
COOL TAP
ELECTRIC
HEAT TAP
ADJ TAP
ELECTRIC HEAT OR TRANSFORMER WIRING
HARNESS CONNECTS HERE
JUMPER IN STORED POSITION
(Vertically on RH side, pins "A" and "B")
HEAT PUMP JUMPER
JUMPER IN "A" CFM
(Horizontally jumper two "A" pins)
550.37-N1Y
8Central Environmental Systems

SYSTEM START-UP
ENERGIZE CRANKCASE HEATER
This unit is equipped with crankcase heaters for both the lead
and follower compressors. The operation of the crankcase
heater is monitored by means of the control board.
CAUTION: Anattemptto start thecompressorwithoutatleast
8 hours of crankcase heat will damage the com-
pressor.
A warning label with an adhesive back is supplied in the unit
installation instruction packet. This label should be attachedto
thefieldsupplieddisconnectswitchwhereitwillbeeasilyseen.
See below.
In order to energize the crankcase heater:
- Set indoor two stage cooling thermostat to "OFF" position.
- Close the line power disconnect to the unit.
CHECKING SYSTEM CHARGE
The factory charge in the outdoor unitis listed in the Table 5 as
well as unit nameplate and includes enoughcharge for the unit
and the corresponding indoor evaporator coil. This unit in-
cludes sufficient charge for 15 feet of line sets. Table 6 lists the
refrigerant line charges for additional lengths.
CAUTION:
REFRIGERANT CHARGING SHOULD ONLY BE
CARRIED OUT BY A QUALIFIED AIR CONDI-
TIONING CONTRACTOR.
In order to check whether the unit has the required charge in
the system, follow the procedure described below.
WARNING:DO NOTVENTREFRIGERANT TOTHEATMOS-
PHERE. IT IS NECESSARY TO RECOVER THE
REFRIGERANT DURING ANY REPAIR OR IN-
STALLATION OF THE SYSTEM.
1. Set room thermostat at desired temperature. The thermo-
stat may be energized at first (Y1) stage or second (Y2)
stage. If only the first stage (Y1) is energized, only the lead
compressor will be in operation. Both the compressors will
be in operation if the second stage of thermostat (Y2) is
energized.
Set room thermostat at "COOL" position and fan switch at
"AUTO" or "FAN" position. There is a five minute delay
when the "system control board" is powered for the first
time. Refer to "System Functions" for more information
about time delays.
2. Operate the unit for a minimum of 15-20 minutes before
checking the charge.
3. Verify the desired indoor air handler air flow (CFM).
4. The system charge should be varified with only the lead
compressor running, however it can be also checked with
both thecompressorsrunningatthesame timeat the rated
indoor air handler air flow. However, itis requiredto estab-
lishthe subcooling level at anyoneconditioni.e.either with
the lead compressor running or when both (the lead and
follower) compressors are running.Recommended sub-
cooling temperature is listed in Table 3.
MODEL
RECOMMENDED SUBCOOLING °F
LEAD
COMPRESSOR
ONLY
LEAD + FOLLOWER*
(BOTH)
COMPR. RUNNING
H1DS036 10 18
H1DS048 10 18
H1DS060 10 18
*Lead compressor is designated / labeled as the # 1 com-
pressor. Follower compressor is the # 2 compressor.
TABLE 3 - RECOMMENDED SUBCOOLING
LIQUID
PRESSURE
(PSIG) @
SERVICE
PORT
Required Subcooling Temp. °F LIQUID
PRESSURE
(PSIG) @
SERVICE
PORT
Required Subcooling Temp. °F
510 12 15 20 510 12 15 20
Liquid Line Temperature °F Liquid Line Temperature °F
139 73 68 66 63 58 264 116 111 109 106 101
146 76 71 69 66 61 271 117 112 110 107 102
153 79 73 71 68 63 276 120 115 113 110 105
161 82 77 75 72 67 285 122 117 115 112 107
166 85 90 88 85 80 301 126 121 119 116 111
179 89 84 82 79 74 309 127 122 120 117 112
187 92 87 85 82 77 317 130 125 123 120 115
196 95 90 88 85 80 325 132 127 125 122 117
202 97 92 90 87 82 333 134 129 127 124 119
208 99 94 92 89 84 342 136 131 129 126 121
220 103 98 96 93 88 350 138 133 131 128 123
229 106 101 99 96 91 359 140 135 133 130 125
236 108 103 101 98 93 368 142 137 135 132 127
246 111 106 104 101 96 377 144 139 137 134 129
256 114 109 107 104 99 386 146 141 139 136 131
TABLE 4 - SUB-COOLING CHART
IMPORTANT
IF POWER HAS BEEN OFF FOR 8 HOURS OR LONGER,
DISCONNECT SWITCH MUST BE TURNED ON 8 HOURS
BEFORE THERMOSTATIS SET TO “HEAT”,"COOL" OR
“AUTO”
035-03095.
550.37-N1Y
Central Environmental Systems 9

5. Measure liquid refrigerant pressure at the service valve by
attaching an accurate pressure gauge to the service port
and record the pressure.
NOTE: When only the lead compressor is running, the
suction pressure will be higher than a standard
single speed system, or a dual compressor sys-
tem with both compressors running. This is a
normal operation for a dual compressor system
operating with a large indoor coil at part load
capacities.
6. Refer to the Table 3 to find the recommended subcooling
temperature.
7. RefertoTable4to determinetheproperliquidlinetempera-
ture at thepoint where the "Required Subcooling Tempera-
ture" and "Measured Liquid Pressure"(from step 5)
intersect. Record the required liquid line temperature.
8. Measure the liquid line temperature by attaching an accu-
rate electronicthermometer ora thermistorat the liquidline
near the condensing unit.
9. If the liquid line temperature is higher than the value deter-
mined in step 7, add refrigerant charge carefully until the
recommended subcooling temperature is obtained at the
corresponding liquid line pressure.
CAUTION: DO NOT OVERCHARGE THE SYSTEM,
THIS COULD LEAD TO DAMAGE TO THE
COMPRESSORS.
It is suggested to maintain the recommended subcooling
levels indicated in Table 4,within ±2 °F. Too low a subcool-
ing or too high a subcooling will result in poor performance
of the air conditioning unit.
NOTE: If liquid line temperature is lower, remove and
recover the refrigerant charge until the recommended sub-
cooling temperature is obtained.
EXAMPLE:
Given an H1DS036 with only the lead compressor operating
on first stage.
1. Liquid pressure at the service valve = 179 lbs.
2. Recommended subcooling temperature from Table 3.
= 10 °F
3. Required liquid line temperature from Table 4 = 84°F
If the measured liquid line temperature at the liquid line near
the condensing unit = 89°F,thentheactuallevelofsubcooling
based on Table 4 = 5°F
Therefore, add charge to reach required liquid line tempera-
ture given in Step 3, thereby, reaching the recommended
subcooling level in Step 2 above.
If the measured liquid line temperature at the liquid line near
thecondensingunit=79°F, then the actual level ofsubcooling
based on Table 4 = 15 °F.
Therefore, remove and recover charge to reach required liquid
line temperature given in Step 3, thereby, reaching the recom-
mended subcooling level in Step 2.
Once the charge is established when the lead compressor is
running,it is not necessary to establish the charge once again
when both compressors are running. However it is recom-
mended to energize the second compressor to verify system
performance.
APPROVED SYSTEM COMBINATIONS
(Outdoor Unit / Variable Speed Air Handler & Coil) CONDENSING UNIT
FACTORY CHARGE
LBS. - OZ.
INDOOR COIL
ADJUSTMENT
CHARGE, OZ.
H1DS036 N1VSD14 G3HC / G1FC036 9 - 9
+0
G3HC / G1FC042 +0
N2VSD20 G3HC / G1FC048 +0
G3HC / G1FC060 +14
H1DS048 N2VSD20 G3HC / G1FC048 9 - 9 +0
G3HC / G1FC060 +14
H1DS060 N2VSD20 G3HC / G1FC060 14 - 6 +0
TABLE 5 - CHARGE ADD STANDARD COILS
UNIT
SIZE LIQUID LINE OD VAPOR LINE OD R22 CHARGE OZ / FT
036, 048, 060 3/8 7/8 0.70
TABLE 6 - REFRIGERANT LINE CHARGES
550.37-N1Y
10 Central Environmental Systems

RECORDING TOTAL SYSTEM CHARGE
The factory charge in the outdoor unit is listed in Table 5 and
includes enough charge for the unit, matched evaporator and
15 feet of lines.Installationsover 15 feet long and some indoor
coilmatchesmayrequiresomeadditionalcharge. Table6 lists
the refrigerant line charges.
The “TOTAL SYSTEM CHARGE” must be permanently
stamped on the unit data plate.
Total system charge is determined as follows:
1. Determine the condensing unit charge from Table 5.
2. Determine indoor coil adjustment charge from Table 5.
3. Calculatetheadditionalchargeforlinelengthsgreaterthan
15 feet using Table 6 factors.
4. Total system charge = Item 1 + Item 2 + Item 3.
5. Permanentlystamptheunitdataplatewiththetotalamount
of refrigerant in the system.
SYSTEMS FUNCTIONS
ThedualcompressorStellarULTRA airconditionerhasunique
system functions as described below.
COOLING OPERATION
Thecondensingunitutilizesatwostagecoolingindoorthermo-
stat. Depending on the cooling load requirements, the com-
pressors are energizedin sequenceby means ofthe two stage
thermostat.
With a call for first stage cooling (Y1), the outdoor fan and the
lead compressor are energized. Simultaneously, the variable
speed indoor blower motor is also energized and the blower
delivers the corresponding airflow adequate for the first stage
cooling load.
Withacallforsecondstagecooling(Y2),thefollowercompres-
sor is also energized. Simultaneously, the variable speed
blower now delivers the rated CFM in order to satisfy the
cooling demand. The follower compressor is energized only
when cooling demand is not met by the lead compressor
runningalone.Oncethesecondstagebuildingloadissatisfied,
the unit will operate with only the lead compressor, until first
stage indoor cooling thermostat is satisfied, or if there is a call
for second stage cooling operation.
SYSTEM CONTROL BOARD OPERATIONS
The Stellar ULTRA air conditioner utilizes a control board to
controlaswellasmonitortheoperationofthetwostagecooling
system. The following is an overview of the functions of the
control board.
Control Board LED Functions
The control board used to control and monitor the operation of
thetwostagecoolingsystemhasaLEDmountedontheboard,
which provides signals (Fault Codes) for several system op-
erations. See Table 7, which provides a list of LED functions
and definitions.
Power Supply
Thefiveminutecontrolboardtimedelayisenergizedbymeans
of24Vpowersupplyfromthetransformerinstalledintheindoor
variable speed air handler. As soon as the control board
receives power, it warms up for five minutes before it starts
operating. The control board also hasa 3Afusewhichprotects
the control board from short circuiting.
Five Minute Time Delay (Control Board)
Every time the control board is poweredafter a power interrup-
tion, it will delay the operation for five minutes . The LED light
on the control board will blink "ON" for 1 second and "OFF" for
4 seconds, indicating a warm up period for the control board.
This will prevent the unit from short cycling.
Five Second Time Delay
A five second time delay is energized every time the board
receives a control signal Y1 or Y2 from the thermostat. This
prevents cycling of the unit and unnecessary operation of the
unit as a result of thermostat jiggling.
One Minute Inter Stage Time Delay
Anytime the unit receives a call for second stage cooling
operation(Y2)fromthethermostat, whentheleadcompressor
is operating, there is a one minute time delay before the
follower compressor will start. The outdoor fan motor and the
lead compressor continue to run during this inter-stage time
delay.
Five Minute Time Delay (Compressor 1 and 2)
A fiveminutetimedelaypreventsthesystemfromshortcycling
after a thermostat off cycle or power interruption.
There is a five minute time delay for both, the lead and the
follower compressor after a thermostatoff cycle.These delays
are incorporated to prevent the short cycling of the unit. How-
ever, during the five minute delay on the follower compressor,
the lead compressor and the outdoor fan will continue to run,
together with the indoor variable speed air handler, if the call
for cooling still exists.
Forservicingor duringinstallationofthecondensingunit,thetime
delay may be overridden by momentarily jumpering the test
terminal and "R" terminal on the board if necessary. However,
the jumper must be removed during normal operation.
Pressure Switches
High and low pressure switches are installed and wired in
series. They provide addtional protection for the system if any
abnormal operating conditions occur. If the control board
senses a tripping of thehigh or low pressure switch, the control
will provide a five minute delay before the system starts oper-
ating again. The LED will blink rapidly indicating that there is a
550.37-N1Y
Central Environmental Systems 11

system error. The LED will blink "ON" for 1 second and "OFF"
for 1 second during the opening of either high or low pressure
switches.Iffourtripsoccur within30minutes, thecontrolboard
logic will lock out the outdoor unit, preventing operation. The
unit can be operated again by resetting the indoor two stage
cooling thermostat once the lockout condition is resolved.
Crankcase Heater Operation
Thecontrolboardwillenergizethecrankcaseheaterduringthe
condensing unit "OFF" cycle.
Condensing Unit Fan Operation
Thecontrolboardwillenergizethecondensingunitfananytime
the compressor is operating. The outdoor fan will remain ener-
gized during the "One Minute Inter-Stage Time Delay". How-
ever,thefanwillnotremainenergized,ifeither,theHighorLow
pressure switches trip.
INSTRUCTING THE OWNER
Assist owner with processing warranty cards. Review Owners
Guide and provide a copy for the owner guidance on proper
operation and maintenance. Instruct the owner orthe operator
how to start, stop and adjust temperature setting.
When applicable, instruct the owner that the compressor is
equipped with a crankcase heater to prevent the migration of
refrigerant to the compressor during the “OFF” cycle. The
heaterisenergizedonlywhentheunitisnotrunning.Ifthemain
switch is disconnected for long periods of shut down, do not
attempt to start the unit 8 hours after the switch has been
connected. Thiswill allow sufficient timefor allliquid refrigerant
to be driven out of the compressor.
The installer should also instruct the owner on proper opera-
tion and maintenance of all other system components.
INDICATIONS OF PROPER OPERATION
Cooling operation is the same as any conventional air condi-
tioning unit.
The following checks may be made to determine if the system
is operating properly:
1. The outdoor fan should be running, with warm air being
discharged from the top of the unit.
2. Theindoorblower(furnaceorairhandler)willbeoperating,
discharging cool air from the ducts.
3. The vapor line at the outdoor unit will feel cool to the touch.
4. Theliquidlineattheoutdoorunitwillfeelwarmtothetouch.
Ifunitisnotoperatingproperly,checkthefollowingitemsbefore
calling a serviceman:
1. Indoor section for dirty filter.
2. Outdoor section for leaf or debris blockage.
Eliminate problem, turn off the thermostat for 10 seconds and
attempt start. Wait 5 minutes. If system does not start, call
service technician.
MAINTENANCE
1. Dirt should not be allowed to accumulate on the outdoor
coils or other parts in the air circuit. Clean as often as
necessary to keep the unit clean. Use a brush, vacuum
cleaner attachment, or other suitable means.
2. The outdoor fanmotor is permanently lubricated and does
not require periodic oiling.
3. If the coil needs to be cleaned, it should be washed with
Calgon CalClean (mix one part CalClean to seven parts
water). Allow solution to remain on coil for 30 minutes
before rinsing with clean water. Solution should not be
permitted to come in contact with painted surfaces.
4. Refer to the furnace or air handler instructions for filterand
blower motor maintenance.
5. The evaporator coil drain pan should be inspected and
cleanedregularlytopreventodorsandassureproperdrain-
age.
WHEN THE SYSTEM IS FUNCTIONING PROPERLY AND
THE OWNER HAS BEEN FULLY INSTRUCTED, SECURE
THE OWNER’S APPROVAL.
P.O. Box 1592, York, Pennsylvania USA 17405-1592
Subject to change without notice. Printed in U.S.A
Copyright  by York International Corporation 1994. All Rights Reserved.
550.37-N1Y
LED DISPLAY DEFINITION
LED LIGHT "ON" (No Flashing) Normal Operation
FLASH (1 Second) PAUSE (4 Seconds) Control Board Warm-up Operation
FLASH (1 Second) PAUSE (1 Second) High or Low Pressure Switch Trip
RAPID FLASHES High or Low Pressure Switch Lockout
LED LIGHT "OFF" No Power Supply or Board Failure
TABLE 7 - LED FUNCTIONS