Bard YL423 User manual

Manual 2100-464A
Page 1 of 20
INSTALLATION INSTRUCTIONS
WALL MOUNTED
PACKAGE AIR CONDITIONERS
MODELS
YL423
YL484
YL602
Manual : 2100-464A
Supersedes: 2100-464
Date: 07-25-06
© Copyright 2005

Manual 2100-464A
Page 2 of 20
Figures
Figure 1 Unit Dimensions ...................................... 5
Figure 2 Fresh Air Damper Assembly ................... 8
Figure 3 Mounting Instructions ............................ 10
Figure 4 Electric Heat Clearance .........................11
Figure 5 Wall Mounting Instructions .................... 12
Figure 6 Wall Mounting Instructions .................... 12
Figure 7 Common Wall Mounting Installations.... 13
Figure 8 Unit 24V Terminal Board ....................... 15
Figure 9 Fan Blade Setting ................................. 18
Tables
Table 1 Electric Heat Table .................................. 4
Table 2 Electrical Specifications .......................... 6
Table 3 Thermostat Wire Size ........................... 14
Table 4 Wall Thermostat .................................... 14
Table 5 Fan Blade Dimensions .......................... 18
Table 6 Refrigerant Charge ............................... 18
Table 7 Indoor Blower Performance .................. 18
Table 8 Recommended Airflow .......................... 19
Table 9 Maximum ESP Electric Heat Only ......... 19
Table 10 Pressure Table ...................................... 19
Table 11 Optional Accessories ............................ 20
Getting Other Information and Publications 3
Wall Mount General Information
Heat Pump Wall Mount Model Nomenclature.......... 4
Shipping Damage .................................................... 7
General ................................................................ 7
Duct Work ................................................................ 7
Filters ................................................................ 8
Fresh Air Intake ....................................................... 8
Condensate Drain .................................................... 8
Installation Instructions
Wall Mounting Information ....................................... 9
Mounting the Unit .................................................... 9
Wiring – Main Power ............................................. 14
Wiring – Low Voltage Wiring ................................. 14
Start Up
Important Installer Note ......................................... 16
High Pressure Switch ............................................ 16
Three Phase Scroll Compressor Start Up .............. 16
Phase Monitor ....................................................... 16
Condenser Fan Operation ..................................... 16
Service Hints ......................................................... 16
Sequence of Operation .......................................... 16
Compressor Control Module .................................. 17
Adjustments ........................................................... 17
Pressure Service Ports .......................................... 17
Troubleshooting
Fan Blade Setting Dimensions .............................. 18
Removal of Fan Shroud ......................................... 18
Refrigerant Charge ................................................ 18
Pressure Table ....................................................... 19
Optional Accessories ............................................. 20
CONTENTS

Manual 2100-464A
Page 3 of 20
GETTING OTHER INFORMATION AND PUBLICATIONS
These publications can help you install the air
conditioner or heat pump. You can usually find these at
your local library or purchase them directly from the
publisher. Be sure to consult current edition of each
standard.
National Electrical Code ....................... ANSI/NFPA 70
Standard for the Installation ............... ANSI/NFPA 90A
of Air Conditioning and Ventilating Systems
Standard for Warm Air ....................... ANSI/NFPA 90B
Heating and Air Conditioning Systems
Load Calculation for ............................. ACCA Manual J
Residential Winter and Summer Air Conditioning
Duct Design for Residential ............... ACCA Manual D
Winter and Summer Air Conditioning and Equipment
Selection
For more information, contact these
publishers:
ACCA Air Conditioning Contractors of America
1712 New Hampshire Ave. N.W.
Washington, DC 20009
Telephone: [phone]
Fax: [phone]
ANSI American National Standards Institute
11 West Street, 13th Floor
New York, NY 10036
Telephone: [phone]
Fax: [phone]
ASHRAE American Society of Heating Refrigerating,
and Air Conditioning Engineers, Inc.
1791 Tullie Circle, N.E.
Atlanta, GA 30329-2305
Telephone: [phone]
Fax: [phone]
NFPA National Fire Protection Association
Batterymarch Park
P.O. Box 9101
Quincy, MA 02269-9901
Telephone: [phone]
Fax: [phone]
Manufactured under the following U.S. Patent numbers:
5,485,878; 5,301,777; 5,002,116; 4,924,934; 4,875,520; 4,825,936; 4,432,409

Manual 2100-464A
Page 4 of 20
WALL MOUNT GENERAL INFORMATION
HEAT PUMP WALL MOUNT MODEL NOMENCLATURE
YL 42 3 – A 10 X X X X X A
NOTE: All vent options are without exhaust capability. May require separate field supplied barometric relief in building.
TABLE 1
ELECTRIC HEAT TABLE
sledoM A-324LY A-484LY A-206LY
B-324LY B-484LY B-206LY C-324LY C-484LY C-206LY
1-0421-8023-0423-8023-064
WKAUTBAUTBAUTBAUTBAUTB
58.02050711.8100821
97.12006037.81030328.0100703
016.14031432.6300652
515.26002150.45004832.63002152.13004833.7100074
MODEL NUMBER CONTROL
MODULES
(See Chart Below)
VOLTS & PHASE
A - 230/208/60/1
B - 230/208/60/3
C - 460/60/3
REVISIONS KW
VENTILATION OPTIONS
X - Barometric Fresh Air Damper (Standard)
B - Blank-off Plate
E - Economizer (Internal) - Fully Modulating with Exhaust FILTER OPTIONS
X - 1-Inch Throwaway (Standard)
W - 1-Inch Washable
P - 2-Inch Pleated
COLOR OPTIONS
X-
Beige (Standard)
1 - White
2 - Mesa Tan
4 - Buckeye Gray
5 - Desert Brown
6 - Dark Bronze
COIL OPTIONS
X - Standard
1 - Phenolic Coated Evaporator
2 - Phenolic Coated Condenser
3 - Phenolic Coated Evaporator
and Condenser
OUTLET OPTIONS
X - Front (Standard)
CAPACITY
42 - 3½ Ton
48 - 4 Ton
60 - 5 Ton

Manual 2100-464A
Page 5 of 20
FIGURE 1
UNIT DIMENSIONS
ledoM htdiW )W( htpeD )D( thgieH )H(
ylppuSnruteR
EFGIJKLMNOPQRSTABCB
24LY 84LY 06LY 570.24234.22578.4888.988.9288.5188.9288.3401.9166.1300.0386.2349.6296.4334.2373.388.2488.3200.0144.100.6188.1
FRONT VIEWLEFT SIDE VIEWBACK VIEW

Manual 2100-464A
Page 6 of 20
1Maximum size of the time delay fuse or HACR type circuit breaker for protection of field wiring conductors.
2Based on 75° C copper wire. All wiring must conform to NEC and all local codes.
3These “Minimum Circuit Ampacity” values are to be used for sizing the field power conductors. Refer to the National Electric
Code (latest revision), article 310 for power conductor sizing.
CAUTION: When more than one field power conductor circuit is run through one conduit, the conductors must be derated. Pay
special attention to note 8 of table 310 regarding Ampacity Adjustment Factors when more than 3 conductors are in a
raceway.
TABLE 2
ELECTRICAL SPECIFICATIONS
ledoM
TIUCRICELGNIS TIUCRICLAUD
detaR &stloV esahP
.oN dleiF rewoP stiucriC
3
muminiM tiucriC yticapmA
1
mumixaM lanretxE roesuF tiucriC rekaerB
2
dleiF rewoP eriW eziS
2
dnuorG eriW eziS
3
muminiM tiucriC yticapmA
1
mumixaM lanretxE esuF .tkCro rekaerB
2
dleiF eriWrewoP eziS
2
dnuorG eziSeriW
TKCATKCBTKCATKCBTKCATKCBTKCATKCB
Z0A,00A-324LY 50A 01A 51A
1-802/032
1
1
12ro1
53539558 05050609 8
8
6
4
010101
8
A/N A/N A/N65 A/N A/N A/N62 A/N A/N A/N06 A/N A/N A/N03 A/N A/N A/N6 A/N A/N A/N01 A/N A/N A/N01 A/N A/N A/N01
Z0B,00B-324LY 90B 51B 3-802/032 1
1
1
424325 535305 8
8
6
010101 A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N
Z0C,00C-324LY 90C 51C 3-064 1
1
1
317162 510203 412101 412101 A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N
Z0A,00A-484LY 50A 01A 51A
1-802/032
1
1
12ro1
63639558 05050609 8
8
6
4
010101
8
A/N A/N A/N95 A/N A/N A/N62 A/N A/N A/N06 A/N A/N A/N03 A/N A/N A/N6 A/N A/N A/N01 A/N A/N A/N01 A/N A/N A/N01
Z0B,00B-484LY 90B 51B 3-802/032 1
1
1
524325 535306 8
8
6
010101 A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N
Z0C,00C-484LY 90C 51C 3-064 1
1
1
317162 510203 412101 412101 A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N
Z0A,00A-206LY 50A 01A 51A
1-802/032
1
1
12ro1
44445558 06060609 8
8
6
4
010101
8
A/N A/N A/N95 A/N A/N A/N62 A/N A/N A/N06 A/N A/N A/N03 A/N A/N A/N6 A/N A/N A/N01 A/N A/N A/N01 A/N A/N A/N01
Z0B,00B-206LY 90B 51B 3-802/032 1
1
1
234325 545406 8
8
6
010101 A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N
Z0C,00C-206LY 90C 51C 3-064 1
1
1
617162 020203 212101 212101 A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N A/N

Manual 2100-464A
Page 7 of 20
SHIPPING DAMAGE
Upon receipt of equipment, the carton should be
checked for external signs of shipping damage. If
damage is found, the receiving party must contact the
last carrier immediately, preferably in writing,
requesting inspection by the carrier’s agent.
GENERAL
The equipment covered in this manual is to be installed
by trained, experienced service and installation
technicians.
The refrigerant system is completely assembled and
charged. All internal wiring is complete.
The unit is designed for use with or without duct work.
Flanges are provided for attaching the supply and return
ducts.
These instructions explain the recommended method to
install the air cooled self-contained unit and the
electrical wiring connections to the unit.
These instructions and any instructions packaged with
any separate equipment required to make up the entire
air conditioning system should be carefully read before
beginning the installation. Note particularly “Starting
Procedure” and any tags and/or labels attached to the
equipment.
While these instructions are intended as a general
recommended guide, they do not supersede any national
and/or local codes in any way. Authorities having
jurisdiction should be consulted before the installation
is made. See Page 3 for information on codes and
standards.
Size of unit for a proposed installation should be based
on heat loss calculation made according to methods of
Air Conditioning Contractors of America (ACCA). The
air duct should be installed in accordance with the
Standards of the National Fire Protection Association
for the Installation of Air Conditioning and Ventilating
Systems of Other Than Residence Type, NFPA No.
90A, and Residence Type Warm Air Heating and Air
Conditioning Systems, NFPA No. 90B. Where local
regulations are at a variance with instructions, installer
should adhere to local codes.
DUCT WORK
All duct work, supply and return, must be properly sized
for the design air flow requirement of the equipment.
Air Conditioning Contractors of America (ACCA) is an
excellent guide to proper sizing. All duct work or
portions thereof not in the conditioned space should be
properly insulated in order to both conserve energy and
prevent condensation or moisture damage.
Refer to Table 9 for maximum static pressure available
for duct design.
Design the duct work according to methods given by the
Air Conditioning Contractors of America (ACCA).
When duct runs through unheated spaces, it should be
insulated with a minimum of one inch of insulation.
Use insulation with a vapor barrier on the outside of the
insulation. Flexible joints should be used to connect the
duct work to the equipment in order to keep the noise
transmission to a minimum.
A 1/4 inch clearance to combustible material for the
first three feet of duct attached to the outlet air frame is
required. See Wall Mounting Instructions and Figures
3, 4, 5 & 6 for further details.
Ducts through the walls must be insulated and all joints
taped or sealed to prevent air or moisture entering the
wall cavity.
Some installations may not require any return air duct.
A metallic return air grille is required with installations
not requiring a return air duct. The spacing between
louvers on the grille shall not be larger than 5/8 inch.
Any grille that meets with 5/8 inch louver criteria may
be used. It is recommended that Bard Return Air Grille
Kit RG2 through RG5 or RFG2 through RFG5 be
installed when no return duct is used. Contact
distributor or factory for ordering information. If using
a return air filter grille, filters must be of sufficient size
to allow a maximum velocity of 400 fpm.
NOTE: If no return air duct is used, applicable
installation codes may limit this cabinet to
installation only in a single story structure.

Manual 2100-464A
Page 8 of 20
FILTERS
A 1-inch throwaway filter is supplied with each unit.
The filter slides into position making it easy to service.
This filter can be serviced from the outside by removing
the service door. A 1-inch washable filter and 2-inch
pleated filter are also available as optional accessories.
The internal filter brackets are adjustable to
accommodate the 2-inch filter by loosening two (2)
screws on each bracket assembly and sliding the
brackets apart to the required width and retightening the
four (4) screws.
FRESH AIR INTAKE
All units are built with fresh air inlet slots punched in
the service panel.
If the unit is equipped with a fresh air damper assembly,
the assembly is shipped already attached to the unit.
The damper blade is locked in the closed position. To
allow the damper to operate, the maximum and
minimum blade position stops must be installed. See
Figure 2.
All capacity, efficiency and cost of operation
information as required for Department of Energy
“Energyguide” Fact Sheets is based upon the fresh air
blank-off plate in place and is recommended for
maximum energy efficiency.
The blank-off plate is available upon request from the
factory and is installed in place of the fresh air damper
shipped with each unit.
CONDENSATE DRAIN
A plastic drain hose extends from the drain pan at the
top of the unit down to the unit base. There are
openings in the unit base for the drain hose to pass
through. In the event the drain hose is connected to a
drain system of some type, it must be an open or vented
type system to assure proper drainage.
FIGURE 2
FRESH AIR DAMPER

Manual 2100-464A
Page 9 of 20
INSTALLATION INSTRUCTIONS
WALL MOUNTING INFORMATION
1. Two holes for the supply and return air openings
must be cut through the wall as shown in Figure 3.
2. On wood frame walls, the wall construction must be
strong and rigid enough to carry the weight of the
unit without transmitting any unit vibration.
3. Concrete block walls must be thoroughly inspected
to insure that they are capable of carrying the weight
of the installed unit.
MOUNTING THE UNIT
1. These units are secured by wall mounting brackets
which secure the unit to the outside wall surface at
both sides. A bottom mounting bracket is provided
for ease of installation, but is not required.
2. The unit itself is suitable for 0 inch clearance, but
the supply air duct flange and the first 3 feet of
supply air duct require a minimum of 1/4 inch
clearance to combustible material. If a combustible
wall use a minimum of 30½" x 10½" dimensions for
sizing. However, it is generally recommended that a
1-inch clearance is used for ease of installation and
maintaining the required clearance to combustible
material. The supply air opening would then be
32" x 12". See Figures 3 and 4 for details.
3. Locate and mark lag bolt locations and bottom
mounting bracket location. See Figure 3.
4. Mount bottom mounting bracket.
5. Hook top rain flashing under back bend of top. Top
rain flashing is shipped secured to the right side of
the back.
6. Position unit in opening and secure with 5/16 lag
bolts; use 7/8 inch diameter flat washers on the lag
bolts.
7. Secure rain flashing to wall and caulk across entire
length of top. See Figure 3.
8. For additional mounting rigidity, the return air and
supply air frames or collars can be drilled and
screwed or welded to the structural wall itself
(depending upon wall construction). Be sure to
observe required clearance if combustible wall.
9. On side-by-side installations, maintain a minimum
of 20 inches clearance on left side to allow access to
control panel and heat strips, and to allow proper
airflow to the outdoor coil. Additional clearance
may be required to meet local or national codes.
WARNING
Failure to provide the 1/4 inch clearance
between the supply duct and a combustible
surface for the first 3 feet of duct can result in
fire causing damage, injury or death.

Manual 2100-464A
Page 10 of 20
FIGURE 3
MOUNTING INSTRUCTIONS

Manual 2100-464A
Page 11 of 20
WARNING
A minimum of 1/4 inch clearance must be maintained between
the supply air duct and combustible materials. This is required
for the first 3 feet of ducting.
It is important to insure that the 1/4 inch minimum spacing is
maintained at all points.
Failure to do this could result in overheating the combustible
material and may result in a fire causing damage, injury or death.
FIGURE 4
ELECTRIC HEAT CLEARANCE
SIDE SECTION VIEW OF SUPPLY AIR DUCT FOR
WALL MOUNTED UNIT SHOWING 1/4 INCH
CLEARANCE TO COMBUSTIBLE SURFACES.

Manual 2100-464A
Page 12 of 20
FIGURE 5
WALL MOUNTING INSTRUCTIONS
FIGURE 6
WALL MOUNTING INSTRUCTIONS
SEE FIGURE 3 – MOUNTING INSTRUCTIONS
SEE UNIT DIMENSIONS, FIGURE
1, FOR ACTUAL DIMENSIONS

Manual 2100-464A
Page 13 of 20
FIGURE 7
COMMON WALL MOUNTING INSTALLATIONS

Manual 2100-464A
Page 14 of 20
WIRING – MAIN POWER
Refer to the unit rating plate for wire sizing information
and maximum fuse or “HACR” type circuit breaker
size. Each outdoor unit is marked with a “Minimum
Circuit Ampacity”. This means that the field wiring
used must be sized to carry that amount of current.
Depending on the installed KW of electric heat, there
may be two field power circuits required. If this is the
case, the unit serial plate will so indicate. All models
are suitable only for connection with copper wire. Each
unit and/or wiring diagram will be marked “Use Copper
Conductors Only”. These instructions must be adhered
to. Refer to the National Electrical Code (NEC) for
complete current carrying capacity data on the various
insulation grades of wiring material. All wiring muse
conform to NEC and all local codes.
The electrical data lists fuse and wire sizes (75° C
copper) for all models including the most commonly
used heater sizes. Also shown are the number of field
power circuits required for the various models with
heaters.
The unit rating plate lists a “Maximum Time Delay
Relay Fuse” or “HACR” type circuit breaker that is to
be used with the equipment. The correct size must be
used for proper circuit protection and also to assure that
there will be no nuisance tripping due to the momentary
high starting current of the compressor motor.
The disconnect access door on this unit may be locked
to prevent unauthorized access to the disconnect. To
convert for the locking capability bend the tab located in
the bottom left hand corner of the disconnect opening
under the disconnect access panel straight out. This tab
will now line up with the slot in the door. When shut a
padlock may be placed through the hole in the tab
preventing entry.
See “Start Up” section for important information on
three phase scroll compressor start ups.
WIRING – LOW VOLTAGE WIRING
230/208V, 1 phase and 3 phase equipment dual primary
voltage transformers. All equipment leaves the factory
wired on 240V tap. For 208V operation, reconnect from
240V to 208V tap. The acceptable operating voltage
range for the 240 and 208V taps are:
TAP RANGE
240 253 – 216
208 220 – 187
NOTE: The voltage should be measured at the field power
connection point in the unit and while the unit is
operating at full load (maximum amperage
operating condition).
Five (5) wires should be run from thermostat subbase to
the 24V terminal board in the unit. A five conductor, 18
gauge copper, color-coded thermostat cable is
recommended. The connection points are shown in
Figure 8:
TABLE 3
THERMOSTAT WIRE SIZE
remrofsnarT AVALFeguaGeriW
mumixaM ecnatsiD teeFnI
553.2
eguag02 eguag81 eguag61 egaug41 egaug21 5406 001 061 052
TABLE 4
WALL THERMOSTAT
tatsomrehTserutaeFetanimoderP
750-3048 )3511D0225HT(
taeHegats1;looCegats1 elbammargorP-noNcinortcelE revoegnahclaunaMrootuA
850-3048 )1511D0225HT(
taeHegats2;looCegats2 elbammargorP-noNcinortcelE revoegnahclaunaMrootuA
940-3048 )083-39F1(
taeHegats2;looCegats2 cinortcelEelbammargorP revoegnahclaunaMrootuA

Manual 2100-464A
Page 15 of 20
FIGURE 8
UNIT 24V TERMINAL BOARD

Manual 2100-464A
Page 16 of 20
PHASE MONITOR
All units with three phase scroll compressors are
equipped with a 3 phase line monitor to prevent
compressor damage due to phase reversal.
The phase monitor in this unit is equipped with two
LEDs. If the Y signal is present at the phase monitor
and phases are correct, the green LED will light.
If phases are reversed, the red fault LED will be lit and
compressor operation is inhibited.
If a fault condition occurs, reverse two of the supply
leads to the unit. Do not reverse any of the unit factory
wires as damage may occur.
CONDENSER FAN OPERATION
The condenser fan motor on 230/208 volt, one and three
phase, 60 HZ units is a two speed motor that comes
factory wired on high speed for peak performance. If
ambient conditions permit, it can be reconnected to low
speed (red wire) for lower sound level. See wiring
diagram.
50 HZ models must have fan wired on low speed. These
models are factory wired on low speed.
SERVICE HINTS
1. Caution homeowner to maintain clean air filters at
all times. Also, not to needlessly close off supply
and return air registers. This reduces airflow
through the system, which shortens equipment
service life as well as increasing operating costs.
2. Switching to heating cycle at 75° F or higher outside
temperature may cause a nuisance trip of the remote
reset high pressure switch. Turn thermostat off then
on to reset the high pressure switch.
3. Check all power fuses or circuit breakers to be sure
they are the correct rating.
4. Periodic cleaning of the outdoor coil to permit full
and unrestricted airflow circulation is essential.
SEQUENCE OF OPERATION
COOLING – Circuit R-Y makes at thermostat pulling
in compressor contactor, starting the compressor and
outdoor motor. The G (indoor motor) circuit is
automatically completed on any call for cooling
operation or can be energized by manual fan switch on
subbase of constant air circulation. On all 230 volt units
there is a one-minute off delay on the blower motor.
460 volt models do not have an off delay. On a call for
heating, circuit R-W1 make at the thermostat pulling in
heat contact for the strip heat and blower operation. On
a call for second stage heat, R-W2 makes bringing on
second heat contactor, if so equipped.
START UP
IMPORTANT INSTALLER NOTE
For improved start up performance wash the indoor coil
with a dish washing detergent.
HIGH PRESSURE SWITCH
The YL484 and YL602 models are supplied with a
remote reset high pressure switch. If tripped, this
pressure switch may be reset by turning the thermostat
off then back on again.
THREE PHASE SCROLL COMPRESSOR
START UP INFORMATION
Scroll compressors, like several other types of
compressors, will only compress in one rotational
direction. Direction of rotation is not an issue with
single phase compressors since they will always start
and run in the proper direction.
However, three phase compressors will rotate in either
direction depending upon phasing of the power. Since
there is a 50-50 chance of connecting power in such a
way as to cause rotation in the reverse direction,
verification of proper rotation must be made.
Verification of proper rotation direction is made by
observing that suction pressure drops and discharge
pressure rises when the compressor is energized.
Reverse rotation also results in an elevated sound level
over that with correct rotation, as well as, substantially
reduced current draw compared to tabulated values.
Verification of proper rotation must be made at the
time the equipment is put into service. If improper
rotation is corrected at this time there will be no
negative impact on the durability of the compressor.
However, reverse operation for over one hour may have
a negative impact on the bearing due to oil pump out.
NOTE: If compressor is allowed to run in reverse rotation
for several minutes, the compressor’s internal
protector will trip.
All three phase ZR3 compressors are wired identically
internally. As a result, once the correct phasing is
determined for a specific system or installation,
connecting properly phased power leads to the same
Fusite terminal should maintain proper rotation
direction.
The direction of rotation of the compressor may be
changed by reversing any two line connections to the
unit.

Manual 2100-464A
Page 17 of 20
COMPRESSOR CONTROL MODULE
The compressor control module is standard on the
YL484 and YL602 models covered by this manual and
is optional on the WL423 model. The compressor
control is an anti-short cycle/lockout timer with high
and low pressure switch monitoring and alarm relay
output.
Adjustable Delay On Make And Break Timer
On initial power up or any time power is interrupted to
the unit, the delay on make period begins, which will be
2 minutes plus 10% of the delay on break setting. When
the delay on make is complete and the high pressure
switch (and low pressure switch if employed) is closed,
the compressor contactor is energized. Upon shutdown,
the delay or break timer starts and prevents restart until
the delay on break and delay on make periods have
expired.
During routine operation of the unit with no power
interruptions, the compressor will operate on demand
with no delay.
High Pressure Switch and Lockout Sequence
If the high pressure switch opens, the compressor
contactor will de-energize immediately. The lockout
timer will go into a soft lockout and stay in soft lockout
until the high pressure switch closes and the delay on
break time has expired. If the high pressure switch
opens again in this same operating cycle, the unit will
go into manual lockout condition and the alarm relay
circuit will energize. Recycling the wall thermostat
resets the manual lockout.
Low Pressure Switch, Bypass, and Lockout
Sequence
If the low pressure switch opens for more than 120
seconds, the compressor contactor will de-energize and
go into a soft lockout. Regardless the state of the low
pressure switch, the contactor will reenergize after the
delay on make time delay has expired. If the low
pressure switch remains open, or opens again for longer
than 120 seconds the unit will go into manual lockout
condition and the alarm relay circuit will energize.
Recycling the wall thermostat resets the manual lockout.
Alarm Relay Output
Alarm terminal is output connection for applications
where alarm relay is employed. This terminal is
powered whenever compressor is locked out due to HPC
or LPC sequences as described.
NOTE: Both high and low pressure switch controls are
inherently automatic reset devices. The high
pressure switch and low pressure switch cut out
and cut in settings are fixed by specific air
conditioner or heat pump unit model. The
lockout features, both soft and manual, are a
function of the Compressor Control Module.
ADJUSTMENTS
Adjustable Delay on Make and Delay on Break
Timer
The potentiometer is used to select Delay on Break time
from 30 seconds to 5 minutes. Delay on Make (DOM)
timing on power-up and after power interruptions is
equal to 2 minutes plus 10% of Delay on Break (DOB)
setting:
0.5 minute (30 seconds) DOB = 123 second DOM
1.0 minute (60 seconds) DOB = 126 second DOM
2.0 minute (120 seconds) DOB = 132 second DOM
3.0 minute (180 seconds) DOB = 138 second DOM
4.0 minute (240 seconds) DOB = 144 second DOM
5.0 minute (300 seconds) DOB = 150 second DOM
During routine operation of the unit with no power
interruptions, the compressor will operate on demand
with no delay.
Typical Settings for Dual Unit Installation:
Unit 1: DOB set at 2 minutes, and DOM is 132 seconds
Unit 2: DOB set at 4 minutes, and DOM is 144 seconds
PRESSURE SERVICE PORTS
High and low pressure service ports are installed on all
units so that the system operating pressures can be
observed. A pressure table can be found later in the
manual covering all models. It is imperative to match
the correct pressure table to the unit by model number.

Manual 2100-464A
Page 18 of 20
REMOVAL OF FAN SHROUD
1. Disconnect all power to the unit.
2. Remove the screws holding both grilles, one on each
side of unit, and remove grilles.
TROUBLESHOOTING
The suction line temperatures in table above are based
upon 80° F dry bulb / 67° F wet bulb (50% R.H.)
temperature and rated airflow across the evaporator
during cooling cycle.
3. Remove screws holding fan shroud to condenser and
bottom. Nine (9) screws.
4. Unwire condenser fan motor.
5. Slide complete motor, fan blade, and shroud
assembly out the left side of the unit.
6. Service motor/fan as needed.
7. Reverse steps to reinstall.
REFRIGERANT CHARGE
The correct system R-22 charge is shown on the unit
rating plate. Optimum unit performance will occur with
a refrigerant charge resulting in a suction line
temperature (6" from compressor) as shown in Table 6.
FIGURE 9
FAN BLADE SETTING
TABLE 5
FAN BLADE SETTING
DIMENSION
ledoM noisnemiD A
324LY 484LY 206LY 57.1
TABLE 6
REFRIGERANT CHARGE
ledoM detaR wolfriA DO59 erutarepmeT DO28 erutarepmeT
324LY004145-2566-46
484LY055165-4576-56
206LY007155-3526-06
TABLE 7
INDOOR BLOWER PERFORMANCE
CFM @ 230V
.P.S.E HnI
2
0
484LY,324LY206LY
V032woLV032hgiHV032woLV032hgiH
lioCyrD teW lioC lioCyrD teW lioC lioCyrD teW lioC lioCyrD teW lioC
0.1.2.3.4.5. 0561 0551 0541 0531 0031 --- 0061 0051 0041 0031 5711 --- 5881 0771 5361 0051 0731 0521 0081 5661 0451 0041 5821 0511 0061 5251 --- --- --- --- 0541 5731 --- --- --- --- 0022 0012 0002 5781 5771 0561 0002 0091 0081 0071 0061 5741
"A"
AIRFLOW
MIS-1724
FAN BLADE SETTING DIMENSIONS
Shown in Figure 9 is the correct fan blade setting
dimension for proper air delivery across the outdoor
coil.
Any service work requiring removal or adjustment in
the fan and/or motor area will require that the
dimensions below be checked and blade adjusted in or
out on the motor shaft accordingly.

Manual 2100-464A
Page 19 of 20
TABLE 8
RECOMMENDED AIRFLOW
* Rated CFM and ESP on high speed tap.
ledoM detaR *MFC detaR *PSE dednemmoceR egnaRwolfriA
324LY004103.0511-0061
484LY055102.5821-0571
206LY007103.5731-0591
TABLE 9
MAXIMUM ESP OF OPERATION
ELECTRIC HEAT ONLY
Values shown are for units equipped with standard 1 inch
throwaway filter or 1 inch washable filter. Derate ESP by
.15 for 2 inch pleated filters.
ledoM324LY484LY206LY
WK hgiH deepS woL deepS hgiH deepS woL deepS hgiH deepS woL deepS
50A- 01A- 51A- 05. 05. 05. 05. 05. 05. 05. 05. 05. 05. 05. 05. 05. 05. 05. 05. 05. 05.
00B- 90B- 51B- 05. 05. 05. 05. 05. 05. 05. 05. 05. 05. 05. 05. 05. 05. 05. 05. 05. 05.
90C- 51C- 05. 05. 05. 05. 05. 05. 05. 05. 05. 05. 05. 05.
Low side pressure ± 2 PSIG
High side pressure ± 5 PSIG
Tables are based upon rated CFM (airflow) across the evaporator coil. If there is any doubt as to correct
operating charge being in the system, the charge should be removed, system evacuated and recharged
to serial plate instructions.
NOTE: Pressure table based on high speed condenser fan operation. If condensing pressures
appear elevated check condenser fan wiring. See “Condenser Fan Operation” on Page 16.
TABLE 10
PRESSURE TABLE
COOLING
Air Temperature Entering Outdoor Coil °F
ledoM riAnruteR erutarepmeTerusserP5708580959001501011511
324LY
BD.ged57 BW.ged26 ediSwoL ediShgiH 07702 27022 37532 57152 67662 77382 87003 97813 97733
BD.ged08 BW.ged76 ediSwoL ediShgiH 57212 77622 87142 08752 18372 28092 38803 48623 58643
BD.ged58 BW.ged27 ediSwoL ediShgiH 87912 08432 18942 38662 48382 58003 68913 78733 88853
484LY
BD.ged57 BW.ged26 ediSwoL ediShgiH 37402 47712 67232 87842 97562 08482 28403 38523 48843
BD.ged08 BW.ged76 ediSwoL ediShgiH 87012 97322 18832 28452 48272 68192 78213 98433 09753
BD.ged58 BW.ged27 ediSwoL ediShgiH 48712 58132 78742 88462 09282 29203 39323 59543 79963
206LY
BD.ged57 BW.ged26 ediSwoL ediShgiH 17332 27742 47262 57872 67592 77313 87133 87153 97173
BD.ged08 BW.ged76 ediSwoL ediShgiH 67732 87352 97962 08582 18303 28123 38043 48093 58183
BD.ged58 BW.ged27 ediSwoL ediShgiH 48542 58162 58872 68692 78413 88333 98353 09373 19493

Manual 2100-464A
Page 20 of 20
TABLE 11
OPTIONAL ACCESSORIES
YL423-A YL423-B YL423-C YL484-A YL484-B YL484-C YL602-A YL602-B YL602-C
traP rebmuNnoitpircseD
5-POB 5-DAFB 5-DAFM etalPffOknalB repmaDriAhserFcirtemoraB repmaDriAhserFdezirotoM X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
5-VRC 5-MFIE tsuahxEhtiwrotalitneVlaicremmoC tsuahxEhtiwrezimonocE X
XX XX XX XX XX XX XX XX X
6-AMC A01-AMC )CAL(lortnoCtneibmAwoL RDT+CPH+CPL X
XX XXXX XX
A31-AMC 51-CMC 61-AMC yaleRmralA+RDT+CPH+CPL tiKtratS lortnoCeusserPwoL X
XX
XXXXXX
81-AMCCAL&CPLXXXXX
B50-BCMW C10-DCMW A80-BCMW A90-BCMW B70-BCMW tiKrekaerBtiucriC tiKtcennocsiDlluP rekaerBtiucriC rekaerBtiucriC rekaerBtiucriC
X
XXX XX
XX
X