Table 9 Vent and Control Options ...................... 22
Manual 2100-585C
Page 2 of 22
GETTING OTHER INFORMATION AND PUBLICATIONS
These publications can help you install the air
conditioner or heat pump. You can usually nd 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:
ACCAAir Conditioning Contractors of America1712 New Hampshire Ave. N.W.
Washington, DC 20009
Telephone: (202) 483-9370
Fax: (202) 234-4721
ANSIAmerican National Standards Institute11 West Street, 13th Floor
New York, NY 10036
Telephone: (212) 642-4900
Fax: (212) 302-1286
ASHRAE American Society of Heating, Refrigeration
and Air Conditioning Engineers, Inc.
1791 Tullie Circle, N.E.
Atlanta, GA 30329-2305
Telephone: (404) 636-8400
Fax: (404) 321-5478
NFPANational Fire Protection AssociationBatterymarch Park
P.O. Box 9101
Quincy, MA 02269-9901
Telephone: (800) 344-3555
Fax: (617) 984-7057
Manual 2100-585C
Page 3 of 22
WALL MOUNT GENERAL INFORMATION
AIR CONDITIONER WALL MOUNT MODEL NOMENCLATURE
H 42 A 2 – A 05 Y P X X X J
MODEL SERIES
CAPACITY
24 - 2 Ton
36 - 3 Ton
42 - 3½ Ton
48 - 4 Ton
60 - 5 Ton
A - Right Hand Air Conditioner
L - Left Hand Air Conditioner
VENTILATION OPTIONS
B - Blank-off Plate (No Ventilation)
Y - 100% Economizer Temperature
Z - 100% Economizer Enthalpy
REVISIONS
KW
VOLTS & PHASE
A - 230/208/60/1
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.
CONTROL MODULES
(See Spec. Sheet)
COIL OPTIONS
COLOR OPTIONS
X - Beige (Standard)
1 - White
4 - Buckeye Gray
5 - Desert Brown
6 - Dark Bronze
A - Aluminum
S - Stainless Steel
FILTER OPTIONS
P - 2 inch Pleated MERV 8
X - Standard
1 - Phenolic Coated Evaporator
2 - Phenolic Coated Condenser
3 - Phenolic Coated Evaporator
and Condenser
OUTLET OPTIONS
X - Front (Standard)
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.
Manual 2100-585C
Page 4 of 22
DUCT WORK
FILTERS
All duct work, supply and return, must be properly
sized for the design airow 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 5 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.
For the H model series 36-60, a 1/4 inch clearance
to combustible material for the rst three feet of duct
attached to the outlet air frame is required. See Wall
Mounting Instructions and Figures 2A-C and Figure 3
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.
A 2-inch pleated MERV 8 is standard with each
unit. The lter slides into position making it easy to
service. This lter can be serviced from the outside by
removing the lter access panel.
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.
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 RG2W thru RG5W or RFG2W thru RFG5W
be installed when no return duct is used. Contact
distributor or factory for ordering information. If using
a return air lter grille, lters must be of sufcient 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 2100-585C
Page 5 of 22
INSTALLATION
WALL MOUNTING INFORMATION
1. Two holes for the supply and return air openings
must be cut through the wall as shown in Figure 2.
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, attached
to skid for shipping, 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 ange and the rst 3 feet
of supply air duct require a minimum of 1/4 inch
clearance to combustible material for model series
H36,
H42, H48 and H60
. However, it is generally
recommended that a 1-inch clearance is used for
ease of installation and maintaining the required
clearance to combustible material. See Figures
2A-C for details on opening sizes.
Minimum Clearances Required to
Combustible Materials
MODELS
H24A, H24L0"0"
H36A, H36L1/4"0"
H42A, H42L
H48A, H48L
H60A, H60L
SUPPLY AIR DUCT
FIRST THREE FEET
1/4"0"
CABINET
WARNING
Failure to provide the 1/4 inch clearance
between the supply duct and a combustible
surface for the rst 3 feet of duct can result in
re causing damage, injury or death.
Clearances Required for Service Access
and Adequate Condenser Airow
LEFT
MODELS
H24A, H36A15"20"10'
H24L, H36L20"15"10'
H42A, H48A, H60A20"20"10'
H42L, H48L, H60L20"20"10'
NOTE: For side by side installation of two (2) H**A models there
must be 20" between units. This can be reduced to 15" by using
a H**L model (left side compressor and controls) for the left unit
and H**A (right side compressor and controls) for right unit.
RIGHT
SIDE
3. Locate and mark lag bolt locations and bottom
mounting bracket location. See Figure 2.
4. Mount bottom mounting bracket.
5. Hook top rain ashing, attached to front - right of
supply ange for shipping, under back bend of top.
6. Position unit in opening and secure with 5/16 lag
bolts; use 7/8 inch diameter at washers on the lag
bolts.
7. Secure rain ashing to wall and caulk across entire
length of top. See Figure 2.
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 right side to allow access
to control panel and heat strips, and to allow proper
airow to the outdoor coil. Additional clearance
may be required to meet local or national codes.
10.
Care should be taken to ensure that the recirculation
and obstruction of condenser discharge air does not
occur. Recirculation of condenser discharge air
can be from either a single unit or multiple units.
Any object such as shrubbery, a building or other
large object can cause obstructions to the condenser
discharge air. Recirculation or reduced airow caused
by obstructions will result in reduced capacity,
possible unit pressure safety lockouts and reduced
unit service life.
SIDE
DISCHARGE
SIDE
Manual 2100-585C
Page 6 of 22
For units with blow through condensers, it is
recommended there be a minimum distance of 10'
between the front of the unit and any barrier or 20'
between the fronts of two opposing (facing) units.
FIGURE 1
Dimensions of Basic Unit for Architectural & Installation Requirements (Nominal)
DUCT FOR WALL MOUNTED UNIT SHOWING 1/4
INCH CLEARANCE TO COMBUSTIBLE SURFACES.
WARNING
A minimum of 1/4 inch clearance must be maintained between
the supply air duct and combustible materials. This is required for
the rst 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 re causing damage, injury or death.
Manual 2100-585C
Page 11 of 22
FIGURE 4
DUCT
OPENING
RETURN AIR
SUPPLY AIR
WOOD FRAME WALL INSTALLATION
OPENING
WALL BEFORE
MOUNT ON UNIT
OPENING
BEFORE INSTALLATION
BOTTOM MOUNTING
CONCRETE BLOCK WALL INSTALLATION
BRACKET. MOUNT ON
OPENING
WOOD OR STEEL SIDING
OPENING
INSTALLING UNIT.
RETURN AIR
WALL STRUCTURE
RETURN AIR
SUPPLY AIR
FACTORY SUPPLIED
RAIN FLASHING.
SUPPLY AIR
MIS-548 A
SIDE VIEW
I
A
C
K
E + 1.000
B
1.000
SUPPLY DUCT
OVER FRAME
INTERIOR FINISHED WALL
ALL AROUND DUCT
FRAMING MATERIAL
EXTERIOR FINISH WALL
OPENING
FOR ACTUAL DIMENSIONS.
2 x 4'S, 2 x 6'S &/OR
STRUCTURAL STEEL
ATTACH TO TOP
1.000" CLEARANCE
1.000" CLEARANCE
PLATE OF WALL
C
SEE UNIT DIMENSIONS, FIGURE 2,
OPENING
RETURN DUCT
2 x 6
ATTACH TO BOTTOM
OVER FRAME
PLATE OF WALL
L
THIS STRUCTURAL MEMBER
LOCATED TO MATCH STUD
SPACING FOR REST OF WALL.
A SECOND MEMBER MAY BE
REQUIRED FOR SOME WALLS.
MIS-549 B
ALL AROUND DUCT
WALL MOUNTING INSTRUCTIONS
SEE FIGURE 3 – MOUNTING INSTRUCTIONS
FIGURE 5
WALL MOUNTING INSTRUCTIONS
Manual 2100-585C
Page 12 of 22
FIGURE 6
COMMON WALL MOUNTING INSTALLATIONS
SUPPLY DUCT MAY BE LOCATED IN AN ATTIC
OR BELOW CEI LI NG RAFTERS AS SHOWN
RAIN
FLASHING
OUTSI DE
WALL
RAIN
FLASHING
RAFTERS
FINISHED CEI LI NG SURFACE
SUPPLY AIR DUCT
W/ GRILLE
RETURN AI R
OPENI NG W/ GRILLE
FREE AIR FLOW
NO DUCT
SUPPLY DUCT MAYBE LOCATED IN AN ATTIC
OR BELOW CEI LI NG RAFTERS AS SHOWN
RAFTERS
RAIN
FLASHING
OUTSI DE
WALL
RAIN
FLASHING
RAFTERS
SUPPLY AIR DUCT
FINISHED CEI LI NG SURFACE
RETURN AI R
OPENI NG W/ GRILLE
DUCTED SUPPLY
RETURN AT UNIT
SUPPLY DUCT MAYBE LOCATED IN AN ATTIC
OR BELOW CEI LI NG RAFTERS AS SHOWN
RAFTERS
SUPPLY AIR DUCT
OUTSI DE
WALL
FALSE WALL INSTALLATION
FINISHED
CEILING SURFACE
RETURN AI R
SPACE
WALL SLEEVE
FALSE WALL
RETURN AI R GRI LLE
OUTSI DE
WALL
SUPPLY AIR DUCT
LOWERED
CEILING
CLOSET WALL
WALL
SLEEVE
RAISED FLOOR
RETURN AI R
SUPPLY AIR
GRILLE
FINISHED CEI LI NG
CLOSET INSTALLATION
Manual 2100-585C
Page 13 of 22
SURFACE
RETURN AI R
GRILLE
MIS-550 C
WIRING – MAIN POWER
Refer to the unit rating plate for wire sizing information and
maximum fuse or circuit breaker size. Each outdoor unit is
marked with a “Minimum Circuit Ampacity”. This means
that the eld wiring used must be sized to carry that amount
of current. Depending on the installed KW of electric heat,
there may be two eld 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 must 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 eld power circuits
required for the various models with heaters.
The unit rating plate lists a “Maximum Time Delay
Relay Fuse” or 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.
See Tables 3A and 3B for Electrical Specications.
Low Voltage Connection
These units use a 24-volt AC low voltage circuit. The
“RT” terminal is the 24V transformer output, and the
“R” terminal is the 24VAC hot terminal for the operation
of the equipment. “RT” and “R” are connected with
brass jumper bar which can be removed and “RT” and
“R” connected to external NC (normally closed) contact
such as a re/smoke detector that will cause immediate
shutdown of the equipment upon activation.
“C” terminal is grounded.
“G” terminal is the fan input.
“Y” terminal is the compressor input for cooling
1-Stage units only
“W1” terminal is the 1st stage electric heat.
“W2” terminal is the 2nd stage heat (if equipped).
“E”, “F”, “Y2” & “A” Used with EWM-T Economizer.
“1” NO (normally open) lockout alarm.
“2” NC (normally closed) lockout alarm.
Used with MD4000 only; do not use for anything else!
“Y1” & “7” Used with EWM-T Economizer; do not use
for anything else!
“8” & “9” ECON Fail Alarm.
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
power connection point in the unit and while
the unit is operating at full load (maximum
amperage operating condition).
For H model units with Y or Z vent option economizers,
refer to the MV4000 Series Lead/Lag Controller manual
2100-571 for low voltage connection diagrams. Factory
installed Y and Z vent option are wired per Figure 7 of
2100-571.
DIRTY FILTER SWITCH AND RELAY
These units include a dirty lter switch and relay. The
alarm output of relay is normally closed, open on alarm
and is connected to terminals 4 and 5 of the unit low
voltage terminal block.
ECONOMIZER FAIL TIME DELAY RELAY
NOTE: Applies only to units with economizers.
These units employ a time delay relay used in
conjunction with the 100% Economizers to provide an
economizer fail alarm. The alarm output is connected
to terminals 8 and 9 of the low voltage terminal block.
The time delay should be set to no less than 3 minutes
to ensure no nuisance alarms.
TIMER TO BE
SET HERE
MIS-3054
Manual 2100-585C
Page 14 of 22
START UP
THESE UNITS REQUIRE R-410A
REFRIGERANT AND POLYOL
ESTER OIL.
GENERAL
1. Use separate service equipment to avoid cross
contamination of oil and refrigerants.
2. Use recovery equipment rated for R-410A
refrigerant.
3. Use manifold gauges rated for R-410A (800 psi/250 psi low).
4. R-410A is a binary blend of HFC-32 and HFC-125.
5. R-410A is nearly azeotropic - similar to R-22 and
R-12. Although nearly azeotropic, charge with
liquid refrigerant.
6. R-410A operates at 40-70% higher pressure than
R-22, and systems designed for R-22 cannot
withstand this higher pressure.
7. R-410A has an ozone depletion potential of zero,
but must be reclaimed due to its global warming
potential.
8. R-410A compressors use Polyol Ester oil.
9. Polyol Ester oil is hygroscopic; it will rapidly
absorb moisture and strongly hold this moisture in
the oil.
10. A liquid line dryer must be used - even a deep
vacuum will not separate moisture from the oil.
11. Limit atmospheric exposure to 15 minutes.
12. If compressor removal is necessary, always plug
compressor immediately after removal. Purge with
small amount of nitrogen when inserting plugs.
TOPPING OFF SYSTEM CHARGE
If a leak has occurred in the system, Bard
Manufacturing recommends reclaiming, evacuating
(see criteria above), and charging to the nameplate
charge. If done correctly, topping off the system
charge can be done without problems.
With R-410A, there are no signicant changes in the
refrigerant composition during multiple leaks and
recharges. R-410A refrigerant is close to being an
azeotropic blend (it behaves like a pure compound
or single component refrigerant). The remaining
refrigerant charge, in the system, may be used after
leaks have occurred and then “top-off” the charge by
utilizing the pressure charts on the inner control panel
cover as a guideline.
REMEMBER: When adding R-410A refrigerant, it
must come out of the charging cylinder/tank as a liquid
to avoid any fractionation, and to insure optimal system
performance. Refer to instructions for the cylinder that
is being utilized for proper method of liquid extraction.
WARNING
Failure to conform to these practices
could lead to damage, injury or death.
SAFETY PRACTICES
1. Never mix R-410A with other refrigerants.
2. Use gloves and safety glasses, Polyol Ester oils can
be irritating to the skin, and liquid refrigerant will
freeze the skin.
3. Never use air and R-410A to leak check; the
mixture may become ammable.
4. Do not inhale R-410A – the vapor attacks the
nervous system, creating dizziness, loss of coordination and slurred speech. Cardiac irregularities, unconsciousness and ultimate death
can result from breathing this concentration.
5. Do not burn R-410A. This decomposition produces hazardous vapors. Evacuate the area if
exposed.
6. Use only cylinders rated DOT4BA/4BW 400.
7. Never ll cylinders over 80% of total capacity.
8. Store cylinders in a cool area, out of direct
sunlight.
9. Never heat cylinders above 125°F.
10. Never trap liquid R-410A in manifold sets, gauge
lines or cylinders. R-410A expands signicantly
at warmer temperatures. Once a cylinder or line is
full of liquid, any further rise in temperature will
cause it to burst.
IMPORTANT INSTALLER NOTE
For improved start up performance wash the indoor coil
with a dish washing detergent.
HIGH PRESSURE SWITCH
All H**A/H**L wall mounted air conditioner series
models are supplied with a remote reset for the high and
low pressure switch. If tripped, this pressure switch may
be reset by turning the thermostat off then back on again.
Manual 2100-585C
Page 15 of 22
CONDENSER FAN OPERATION
NOTE: Certain models may be equipped with a
Low Ambient Control (LAC), and if so equipped the
condenser fan motor will have delay start until system
refrigerant operationg pressure builds up. After starting,
the fan motor may or may not cycle depending upon
ambient conditions. This is normal 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.
SERVICE HINTS
1. Caution owner/operator to maintain clean air
lters at all times. Also, not to needlessly close off
supply and return air registers. This reduces airow
through the system, which shortens equipment
service life as well as increasing operating costs.
2. Check all power fuses or circuit breakers to be sure
they are the correct rating.
3. Periodic cleaning of the outdoor coil to permit full
and unrestricted airow circulation is essential.
SEQUENCE OF OPERATION
COOLING – Circuit R-Y makes at thermostat pulling
in compressor contactor, starting the compressor
and outdoor motor. (See Note under Condenser Fan
Operation if equipped with Low Ambient Control.)
The G (indoor motor) circuit is automatically
completed on any call for cooling operation or can be
energized by manual fan switch on subbase for constant
air circulation. 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.
COMPRESSOR CONTROL MODULE
The compressor control module is standard on all models
covered by this manual. The compressor control module
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 anytime 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 is closed, the
compressor contactor is energized. Upon shutdown, the
delay on 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 & 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 the 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
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 & 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. See Table 2.
Manual 2100-585C
Page 16 of 22
SERVICE
FAN BLADE SETTING DIMENSIONS
Shown in Figure 7 is the correct fan blade setting for
proper air delivery across the outdoor coil. Refer to
Table 1 for unit specic dimension.
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.
FIGURE 7
FAN BLADE SETTING
AIRFLOW
"A"
MIS-1724
TABLE 1
FAN BLADE DIMENSION
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.
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.
R-410A
REFRIGERANT CHARGE
This unit was charged at the factory with the quantity of
refrigerant listed on the serial plate. AHRI capacity and
efciency ratings were determined by testing with this
refrigerant charge quantity.
The pressure table on the following page shows
nominal pressures for the units. Since many installation
specic situations can affect the pressure readings, this
information should only be used by certied technicians
as a guide for evaluating proper system performance.
They shall not be used to adjust charge. If charge is in
doubt, reclaim, evacuate and recharge the unit to the
serial plate charge.
Model
H24A2/H24L21.00"
H36A2/H36L21.25"
H42A2/H42L2
H48A2/H48L2
H60A2/H60L2
Dimension
A
1.75"
Manual 2100-585C
Page 17 of 22
TABLE 2
COOLING PRESSURE
Air Temperature Entering Outdoor Coil °F
Model
H24A/L
H36A/L
H42A/L
H48A/L
H60A/L
Return Air Temp (DB/
WB)
75/62
80/67
85/72
75/62
80/67
85/72
75/62
80/67
85/72
75/62
80/67
85/72
75/62
80/67
85/72
Pressure7580859095100105110115120
Low Side
High Side
Low Side
High Side
Low Side
High Side
Low Side
High Side
Low Side
High Side
Low Side
High Side
Low Side
High Side
Low Side
High Side
Low Side
High Side
Low Side
High Side
Low Side
High Side
Low Side
High Side
Low Side
High Side
Low Side
High Side
Low Side
High Side
119
340
127
349
131
361
120
339
128
348
132
360
123
320
132
328
137
339
117
355
125
364
129
377
122
346
131
355
136
367
121
361
129
370
134
383
122
366
130
375
135
388
124
342
133
351
138
363
119
378
127
388
131
402
124
371
133
380
138
393
122
383
131
393
136
407
124
392
133
402
138
416
126
367
135
376
140
389
121
403
129
413
134
427
126
396
135
406
140
420
124
407
133
417
138
432
126
418
135
429
140
444
128
391
137
401
142
415
123
427
132
438
137
453
128
421
137
432
142
447
127
432
136
443
141
459
129
446
138
457
143
473
130
416
139
427
144
442
125
454
134
466
139
482
130
447
139
458
144
474
129
459
138
471
143
487
130
473
139
485
144
502
132
443
141
454
146
470
127
482
136
494
141
511
131
473
140
485
145
502
131
488
140
500
145
518
132
501
141
514
146
532
134
469
143
481
148
498
129
510
138
523
143
541
133
499
142
512
147
530
133
518
142
531
147
550
134
529
143
543
148
562
136
496
145
509
150
527
131
539
140
553
145
572
135
526
144
539
149
558
135
550
144
564
149
584
135
558
144
572
149
592
137
526
147
539
152
558
133
570
142
585
147
605
137
553
146
567
151
587
137
583
146
598
151
619
136
586
145
601
150
622
139
554
149
568
154
588
135
603
144
618
149
640
138
580
148
595
153
616
Low side pressure ± 4 PSIG
High side pressure ± 10 PSIG
Tables are based upon rated CFM (airow) 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 charge weight.
NOTE:
Pressure table based on high speed condenser fan operation. If condensing pressures appear elevated
check condenser fan wiring. See “Condenser Fan Operation”.
Manual 2100-585C
Page 18 of 22
TABLE 3A
ELECTRICAL SPECIFICATIONS H**A SERIES
No.
Field
Power
Circuits
1
1
1
1
1
1
1
1
1
1 or 2
1
1
1
1 or 2
1 or 2
1
1
1
1 or 2
1 or 2
1
1
1
1 or 2
1 or 2
Minimum
Circuit
Ampacity
21
25
30
46
56
29
32
47
58
84
32
32
58
84
110
39
39
58
84
110
42
42
60
86
112
A04
A05
A08
A10
A05*
A08
A10*
A15
A05
A10
A15
A20
A05
A10
A15
A20
A05
A10
A15
A20
Rated
Volts &
Phase
230/208-1
230/208-1
230/208-1
230/208-1
230/208-1
MODEL
H24A2-A00, A0Z
H36A2-A00*, A0Z*
H42A2-A00, A0Z
H48A2-A00, A0Z
H60A2-A00, A0Z
Maximum size of the time delay fuse or circuit breaker for protection of eld wiring conductors.
Based on 75C copper wire. All wiring must conform to the National Electrical Code and all local codes.
Maximum
External
Fuse or
Ckt. Brkr.
30
30
30
50
60
35
35
50
60
90
50
50
60
90
125
50
50
60
90
125
60
60
60
90
125
Field
Power
Wire
Size
10
10
10
8
6
8
8
8
6
4
8
8
6
4
2
8
8
6
4
2
8
8
6
3
2
Ground
Wire
These “Minimum Circuit Ampacity” values are to be used for sizing the eld power conductors. Refer to the National Electrical code (latest version), Article 310 for power conductor sizing.
Caution: When more than one eld power 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 three (3) current carrying conductors are in a raceway.
* Top outlet supply option is available only factory installed and only on the selected models.
IMPORTANT: While this electrical data is presented as a guide, it is important to electrically connect properly sized fuses and conductor wires in accordance with the National
Electrical Code and all local codes.
Minimum
Circuit
Ampacity
Maximum
External Fuse
or Ckt. Breaker
Field Power
Wire Size
Ground
Wire Size
Ckt. A Ckt. B Ckt. A Ckt. B Ckt. A Ckt. B Ckt. A Ckt. B
10
10
10
10
10
10
10
10
10
8582660306101010
10
10
10
8
58
26
60
30
6
10
6
58
52
60
60
6
10
10
10
8
58
26
60
30
6
58
52
60
10
10
10
8
60
26
6
60
60
52
60
6
60
6
30
6
60
6
10
6
10
10
10
6
10
10
10
6
10
10
10
10
10
10
10
Single CircuitDual Circuit
TABLE 3B
ELECTRICAL SPECIFICATIONS H**L SERIES
No.
Field
Power
Circuits
1
1
1
1
1
1
1
1 or 2
1
1
1
1 or 2
1
1
1
1 or 2
1
1
1
1 or 2
Minimum
Circuit
Ampacity
21
30
46
56
29
32
58
84
32
32
58
84
39
39
58
84
42
42
60
86
A05
A08
A10
A05*
A10*
A15
A05
A10
A15
A05
A10
A15
A05
A10
A15
Rated
Volts &
Phase
230/208-1
230/208-1
230/208-1
230/208-1
230/208-1
MODEL
H24L2-A00, A0Z
H36L2-A00*, A0Z*
H42L2-A00, A0Z
H48L2-A00, A0Z
H60L2-A00, A0Z
Maximum size of the time delay fuse or circuit breaker for protection of eld wiring conductors.
Based on 75C copper wire. All wiring must conform to the National Electrical Code and all local codes.
These “Minimum Circuit Ampacity” values are to be used for sizing the eld power conductors. Refer to the National Electrical code (latest version), Article 310 for power conductor sizing.
Caution: When more than one eld power 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 three (3) current carrying conductors are in a raceway.
* Top outlet supply option is available only factory installed and only on the selected models.
IMPORTANT: While this electrical data is presented as a guide, it is important to electrically connect properly sized fuses and conductor wires in accordance with the National
Electrical Code and all local codes.
Single CircuitDual Circuit
Maximum
External
Fuse or
Ckt. Brkr.
30
30
50
60
35
35
60
90
50
50
60
90
50
50
60
90
60
60
60
90
Field
Power
Wire
Size
10
10
8
6
8
8
6
4
8
8
6
4
8
8
6
4
8
8
6
3
Minimum
Ground
Wire
10
10
10
10
10
10
10
8582660306101010
10
10
10
8582660306101010
10
10
10
8582660306101010
10
10
10
8602660306101010
Circuit
Ampacity
Ckt. A Ckt. B Ckt. A Ckt. B Ckt. A Ckt. B Ckt. A Ckt. B