Bard H24A2-A, H42A2-A, H48A2-A, H36A2-A, H60A2-A User Manual

...
INSTALLATION INSTRUCTIONS
WALL MOUNTED PACKAGED
AIR CONDITIONER
Models:
H24A2-A H36A2-A H42A2-A H48A2-A H60A2-A
H24L2-A H36L2-A H42L2-A H48L2-A H60L2-A
Bard Manufacturing Company, Inc. Bryan, Ohio 43506
www.bardhvac.com
Page 1 of 22
CONTENTS
Getting Other Information and Publications ........... 3
Wall Mount General Information ..............................4
Wall Mount Model Nomenclature .............................. 4
Shipping Damage ..................................................... 4
General ..................................................................... 4
Duct Work .................................................................5
Filters ........................................................................ 5
Condensate Drain .................................................... 5
Installation .................................................................. 6
Wall Mounting Information ........................................6
Mounting the Unit ...................................................... 6
Minimum Clearances ................................................ 6
Clearances Required ................................................ 6
Wiring – Main Power ............................................... 14
Wiring – Low Voltage Wiring ................................... 14
Dirty Filter Switch and Relay ................................... 14
Economizer Fail Time Delay Relay ......................... 14
Start Up ..................................................................... 15
General ................................................................... 15
Topping Off System Charge .................................... 15
Safety Practices ...................................................... 15
Important Installer Note ........................................... 15
High Pressure Switch .............................................. 15
Condenser Fan Operation ...................................... 16
Service Hints ........................................................... 16
Sequence of Operation ........................................... 16
Compressor Control Module ................................... 16
Adjustments ............................................................ 16
Pressure Service Ports ........................................... 16
Service ...................................................................... 17
Fan Blade Setting Dimensions ................................ 17
Removal of Fan Shroud .......................................... 17
R410A Refrigerant Charge ......................................17
Figures
Figure 1 Unit Dimensions ...................................... 7
Figure 2A H24 Mounting Instructions ...................... 8
Figure 2B H36 Mounting Instructions ...................... 9
Figure 2C H42, 48, 60 Mounting Instructions ........ 10
Figure 3 Electric Heat Clearance ........................ 11
Figure 4 Wall Mounting Instructions .................... 12
Figure 5 Wall Mounting Instructions .................... 12
Figure 6 Common Wall Mounting Installations .... 13
Figure 7 Fan Blade Setting ................................. 17
Tables
Table 1 Fan Blade Dimensions .......................... 17
Table 2 Cooling Pressure .................................. 18
Table 3A Electrical Specications H**A Series ....19
Table 3B Electrical Specications H**L Series ..... 19
Table 4 Recommended Airow .......................... 20
Table 5 Indoor Blower Performance .................. 20
Table 6 Max ESP of Operation Elec Heat Only . 20
Table 7 Electric Heat .......................................... 21
Table 8 Optional Accessories ............................ 21
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:
ACCA Air Conditioning Contractors of America 1712 New Hampshire Ave. N.W. Washington, DC 20009 Telephone: (202) 483-9370 Fax: (202) 234-4721
ANSI American National Standards Institute 11 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
NFPA National Fire Protection Association Batterymarch 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 airow 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 sufcient 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, H24L 0" 0"
H36A, H36L 1/4" 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 Airow
LEFT
MODELS
H24A, H36A 15" 20" 10'
H24L, H36L 20" 15" 10'
H42A, H48A, H60A 20" 20" 10'
H42L, H48L, H60L 20" 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
airow 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 airow 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)
MODEL
H24A, L 33.300 17.125 70.563 7.88 19.88 11.88 19.88 35.00 11.00 25.75 20.56 26.75 28.06 29.25 27.00 2.63 34.13 22.06 10.55 4.19 12.00 5.00
H36A, L 38.200 17.125 70.563 7.88 27.88 13.88 27.88 40.00 11.00 25.75 17.93 26.75 28.75 29.25 27.00 2.75 39.19 22.75 9.14 4.19 12.00 5.00
H42A, L H48A, L H60A, L
WIDTH
DEPTH
(W)
42.075 22.432 84.875 9.88 29.88 15.88 29.88 43.88 13.63 31.66 30.00 32.68 26.94 34.69 32.43 3.37 42.88 23.88 10.00 1.44 16.00 1.88
HEIGHT
(D)
All dimensions are in inches. Dimensional drawings are not to scale.
H**A RIGHT UNIT
5.88
F
G
Not used when EWM Economizer is installed. Filter access is through the EWM hood.
Filter Access Panel
Ventilation Air
Condenser
Air Outlet
Front View
H**L LEFT
.44
UNIT
R
S
S
S
S
S
T
Drain
Not used when EWM Economizer is installed. Filter access is through the EWM hood.
Supply Air Opening
Return Air Opening
Bottom
Installation
Bracket
SUPPLY RETURN
(H)
A B C B E F G I J K L M N O P Q R S T
E O
Supply Air Opening
B
Return Air Opening
Back View
W
Filter Access Panel
Ventilation Air
Condenser
Air Outlet
Front ViewSide View
W
E O
B
Back View
Built In
Rain Hood
4° Pitch
Heater
Access
Panel
Electric
Heat
C. Breaker/ Disconnect
Access Panel
(Lockable)
Economizer Air Intake Hood
Economizer
Q
Controls
Standard flush vent door for non-Econ. models
Side Wall Mounting Brackets (Built In)
Top Rain
Flashing
Shipping
Location
Optional Electrical Entrances
P
N
L
M
7"
Low Voltage
Electrical Entrance
High Voltage
Electrical Entrance
Built In Rain Hood 4° Pitch
2.13
A
I
C
H
K
1
J
D
Cond.
Air
Inlet
Side View
D
Cond.
Air
Inlet
2.13
A
I
C
K
J
Drain
C. Breaker/ Disconnect Access Panel (Lockable)
Standard flush
Economizer Air Intake Hood
Low Voltage Electrical Entrance
High Voltage Electrical Entrance
Side Wall Mounting
Brackets
(Built In)
Top Rain
Flashing Shipping Location
Optional
H
Electrical
Entrances
L
M
Electric Heat
Heater Access Panel
vent door for
non-Econ.
models
Economizer controls (opposite side)
7"
P
N
Q
Manual 2100-585C Page 7 of 22
.44
Bottom Installation Bracket
MIS-3624
1
5.88
MIS-3625
R
S
S
S
S
S
T
F
G
12"
12"
12"
12"
12"
20"
20"
1"
3"
4"
Typ.
8"
20
1
2
"
12"
1"
3
1
8
"
4"
Typ.
5"
7
8
"
3
13
16
"
2" 2"
7
1
16
" 7
1
16
"
NOTES:
RAIN FLASHING
RETURN AIR
HEATER ACCESS
ENTIRE LENGTH OF TOP.
TOP
WALL
OF CAULKING ALONG
PANEL
FOAM AIR SEAL
WALL STRUCTURE
OPENING
TOP FLASHING AT TIME OF INSTALLATION.
THE SIDE MOUNTING FLANGES AND UNDER
DUCT
Wall Opening and Hole Location View Right Side View
SEAL WITH BEAD
IT IS RECOMMENDED THAT A BEAD OF
SILICONE CAULKING BE PLACED BEHIND
SUPPLY AIR
SUPPLIED
Return Opening
Supply Opening
H**A UNIT SHOWN, H**L UNIT
CONTROLS AND HEATER ACCESS
IS ON OPPOSITE (LEFT) SIDE.
MIS-3658
FIGURE 2A
H24A2, H24L2 MOUNTING INSTRUCTIONS
Manual 2100-585C Page 8 of 22
28"
A
C
D
C
12"
12"
12"
12"
12"
5
1
16
"
B
E
14"
4
11
16
" 4
11
16
"
4"
Typ.
2
7
8
"
7
8
"
7
8
"
4"
Typ.
7
8
"
3
1
8
"
SUPPLIED
H*A UNIT SHOWN, H*L UNIT
MIS-3659
SUPPLY AIR
ENTIRE LENGTH OF TOP.
TOP
OF CAULKING ALONG
PANEL
FOAM AIR SEAL
WALL STRUCTURE
RAIN FLASHING
FOUR SIDES OF SUPPLY
AIR DUCT IS REQUIRED
FROM COMBUSTABLE
MATERIALS
NOTES:
1/4" CLEARANCE ON ALL
HEATER ACCESS
TOP FLASHING AT TIME OF INSTALLATION.
THE SIDE MOUNTING FLANGES AND UNDER
SILICONE CAULKING BE PLACED BEHIND
IS ON OPPOSITE (LEFT) SIDE.
OPENING
CONTROLS AND HEATER ACCESS
DUCT
RETURN AIR
Right Side View
SEAL WITH BEAD
IT IS RECOMMENDED THAT A BEAD OF
WALL
Wall Opening and Hole Location View
Return Opening
16 7/84 7/164 5/89 7/829 7/8
17 5/83 11/165 3/88 3/8
28 3/8
EDCBA
COMBUSTIBLE MATERIALS
RECOMMENDED 1" CLEARANCE FROM
REQUIRED DIMENSIONS TO MAINTAIN
COMBUSTIBLE MATERIALS
1/4" MIN. CLEARANCE FROM
REQUIRED DIMENSIONS TO MAINTAIN
Supply Opening
FIGURE 2B
H36A2, H36L2 MOUNTING INSTRUCTIONS
Manual 2100-585C Page 9 of 22
D
16"
16"
16"
16"
16"
1
7
8
"
6
1
2
" 6
1
2
"
2
1
8
"
7
8
"
1"
3"
4"
Typ.
4"
Typ.
6
1
2
"
30"
E
16"
A CC
3
1
8
"
B
Wall Opening and Hole Location View
RETURN AIR
1
REQUIRED DIMENSIONS TO MAINTAIN
1/4" MIN. CLEARANCE FROM
COMBUSTIBLE MATERIALS
REQUIRED DIMENSIONS TO MAINTAIN
29
DUCT
COMBUSTIBLE MATERIALS
A B C DE
30 1/2
10 1/2
6 1/4 1 1/4 29 3/4
32 12 5 1/2
2
NOTES:
WALL STRUCTURE
1
SUPPLY AIR
IT IS RECOMMENDED THAT A BEAD OF
OPENING
Right Side View
RAIN FLASHING
SILICONE CAULKING BE PLACED BEHIND
RECOMMENDED 1" CLEARANCE FROM
THE SIDE MOUNTING FLANGES AND UNDER
TOP FLASHING AT TIME OF INSTALLATION.
TOP.
PANEL
HEATER ACCESS
FOUR SIDES OF SUPPLY
AIR DUCT IS REQUIRED
FROM COMBUSTABLE
WALL
1/4" CLEARANCE ON ALL
MATERIALS
Supply Opening
FOAM AIR SEAL
SUPPLIED
SEAL WITH BEAD
OF CAULKING ALONG
ENTIRE LENGTH OF
TOP
1
Return Opening
MIS-416 E
Dimension is 21" on 95" tall units.
2
Dimension is 10" on T48H1 & T60H1.
2
Dimension is 6" on T48H1 & T60H1.
3
3
FIGURE 2C
Manual 2100-585C Page 10 of 22
H42A2, H42L2, H48A2, H48L2, H60A2, H60L2 MOUNTING INSTRUCTIONS
"
"
FIGURE 3
ELECTRIC HEAT CLEARANCE
NOTE 1: SIDE SECTION VIEW OF SUPPLY AIR
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 Specications.
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.
3” COM lockout alarm. “4” & “5” dirty lter alarm NC (normally closed).6
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
240 253 – 216 208 220 – 187
NOTE: Thevoltageshouldbemeasuredattheeld
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 signicant 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 signicantly
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 airow
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 airow 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
settingsarexedbyspecicairconditioner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 & 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 specic 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
efciency 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
specic situations can affect the pressure readings, this information should only be used by certied 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/H24L2 1.00"
H36A2/H36L2 1.25"
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
Pressure 75 80 85 90 95 100 105 110 115 120
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 (airow) 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
8 58 26 60 30 6 10 10 10
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 Circuit Dual 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 Circuit Dual 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
8 58 26 60 30 6 10 10 10
10 10 10
8 58 26 60 30 6 10 10 10
10 10 10
8 58 26 60 30 6 10 10 10
10 10 10
8 60 26 60 30 6 10 10 10
Circuit
Ampacity
Ckt. A Ckt. B Ckt. A Ckt. B Ckt. A Ckt. B Ckt. A Ckt. B
Maximum
External Fuse
or Ckt. Breaker
Field Power
Wire Size
Ground
Wire Size
Manual 2100-585C Page 19 of 22
TABLE 4
RECOMMENDED AIRFLOW
Model
H24A, H24L 800 .30 700 - 950 Single
H36A, H36L 1100 .20 930 - 1350 High
H42A, H42L 1400 .45 1600 - 1150 High
H48A, H48L 1550 .30 1750 - 1285 High
H60A, H60L 1700 .40 1950 - 1375 High
* Rated CFM and ESP on factory speed connection.
Nominal
Rated CFM*
Nominal
Rated
ESP*
Recommended
Airow Range
Factory Speed
Connection
TABLE 5
INDOOR BLOWER PERFORMANCE
Speed
ESP
(Inch H20)
0.0 990 970 1415 1275 955 925 1850 1800 1605 1555 2080 2015 1505 1460
0.1 945 925 1350 1215 945 915 1775 1725 1545 1500 2020 1960 1450 1405
0.2 890 870 1265 1125 925 900 1685 1640 1460 1415 1925 1865 1395 1355
H24 H36 H42/48 H60
Single High Low High Low High Low
Dry
Wet
Dry
Wet
Dry
Wet
Dry
Wet
Dry
Wet
Dry
Wet
Coil
Coil
Coil
Coil
Coil
Coil
Coil
Coil
Coil
Coil
Coil
Coil
Dry
Coil
Wet Coil
0.3 820 800 1190 1060 875 850 1590 1550 1390 1345 1870 1815 1340 1300
0.4 735 720 1085 975 780 755 1495 1460 1310 1270 1755 1705 1225 1185
0.5 605 590 970 865 640 615 1400 1365 1225 1185 1660 1610 1125 1085
TABLE 6
MAXIMUM ESP OF OPERATION
ELECTRIC HEAT ONLY
Model H24A/L H36A/L H42A/L, H48A/L H60A/L
Outlet FRONT FRONT TOP FRONT FRONT
Speed Single High Low High Low High Low High Low
-A0Z
-A04
-A05
-A08
-A10
-A15
-A20
Values shown are for units equipped with standard 1-inch throwaway lter or 1-inch washable lter. Derate ESP by .15 for 2-inch pleated lters.
.50
.50 .50
.50
.50 .50 .50 .40
.50
.50 .50 .45 .35
.50 .50
.50
.50 .45
.35
.50
.50
.50 .50 .50
.50
.50
.50 .50 .45
.50
.50
.50 .50 .50
.50
.50
.50 .50 .40
Manual 2100-585C Page 20 of 22
TABLE 7
ELECTRIC HEAT
Right Hand Units
Heater Kits
Circuit Breakers
(WMCB)
&
Pull Disconnects
(WMPD)
Models
(KW)
4 16.7 13650 14.4 10240
5 20.8 17065 18.1 12800
8 33.3 27300 28.8 20475
10 41.6 34130 36.2 25600
15 62.5 51250 54.0 38400
20 83.2 68260 72.1 51200
240V-1 208V-1
Amps BTUH Amps BTUH
TABLE 8
OPTIONAL ACCESSORIES
-A
-A
-A
-A
A2
A2
A2
A2
H24
H36
H42
H48
EHWA02-A05 X
EHW02A-A08 X
EHWA02A-A10 X
EHWA24-A04 X
EHWA03-A05 X
EHWA03-A08 X
EHWA03-A10 X
EHWA03-A15 X
EHWA05-A05 X X
EHWA05-A10 X X X
EHWA05-A15 X X X
EHWA05-A20 X X X
EHWA60-A05 X
WMCB-03A X
WMCB-05A X
WMCB-08A X X
WMCB-09A X
-A A2
H60
Circuit Breakers
Pull Disconnects
Left Hand Units
Heater Kits
(WMCB)
&
(WMPD)
-A
-A
-A
L2
L2
H24
H36
EHWA02A-A05L X
EHW02A-A08L X
EHWA02-A10L X
EHWA03-A05L X
EHWA03-A10L X
EHWA03-A15L X
EHWA05-A05L X X X
EHWA05-A10L X X X
EHWA05-A15L X X X
WMCB-03A X
WMCB-05A X
WMCB-08A X X
WMCB-09A X
L2
H42
-A L2
H48
-A L2
H60
Manual 2100-585C Page 21 of 22
TABLE 9
VENT AND CONTROL OPTIONS
Part Number Description
H24
H36
H42
CMC-14 ODT X X X
CMC-15 Start Kit (230V 1-Phase) X X X
CMC-23 DDC X X
CMC-24 DDC X
CMC-28 LAC X X X
BOP-2 Blank Off Plate X
EWM2-E EWM2-T
BOP-3 Blank Off Plate X
EWM3-E EWM3-T
BOP-5 Blank Off Plate X
EWM5-E EWM5-T
Economizer - Bldg. Equipment, Enthalpy Economizer - Bldg. Equipment, DB Temp.
Economizer - Bldg. Equipment, Enthalpy Economizer - Bldg. Equipment, DB Temp.
Economizer - Bldg. Equipment, Enthalpy Economizer - Bldg. Equipment, DB Temp.
X X
X X
X X
H48
H60
Manual 2100-585C Page 22 of 22
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