Bard D3SA 2, D3SL 2, D4SA 2, D4SL 2, D5SA 2, D5SL 2, D36A 2, D36L 2, D42A 2, D42L 2, D48A 2, D48L 2, D60A 2, D60L 2 wall mounted package air conditioners Installation Instructions
Below you will find brief information for wall mounted package air conditioners D3SA2, D3SL2, D4SA2, D4SL2, D5SA2, D5SL2.. These units are 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.
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INSTALLATION INSTRUCTIONS
WALL MOUNTED
PACKAGE AIR CONDITIONERS with DC Powered Blower & Economizer
MODELS
D3SA2 D3SL2
D4SA2 D4SL2
D5SA2 D5SL2
D36A2 D36L2
D42A2 D42L2
D48A2 D48L2
D60A2 D60L2
NOTE: THE RECOMMENDED CONTROLLERS FOR THESE MODELS INCLUDE
A BARD MV4000 CONTROLLER PLUS AN MVH-1 HUMIDISTAT ACCESSORY.
Bard Manufacturing Company, Inc.
Bryan, Ohio 43506
Since 1914...Moving ahead just as planned.
Manual : 2100-612A
Supersedes: 2100-612
File: Volume III Tab 17
Date: 03-27-14
Manual 2100-612A
Page 1 of 31
Contents
Getting Other Information and Publications 3
ANSI Z535.5 Definitions ............................................4
Wall Mount General Information
Wall Mount Model Nomenclature .............................. 5
Shipping Damage ..................................................... 5
General ................................................................. 5
Duct Work ................................................................. 6
Filters ................................................................. 6
Condensate Drain .................................................... 6
Installation Instructions
Wall Mounting Information ........................................ 7
Mounting the Unit ...................................................... 7
Placement ................................................................. 7
Clearances Required ................................................ 7
Minimum Clearances ................................................ 7
Wiring – Main Power ............................................... 13
Wiring – Low Voltage Wiring ................................... 13
Start Up
General ............................................................... 15
Topping Off System Charge .................................... 15
Safety Practices ...................................................... 15
Important Installer Note ........................................... 16
Compressor Control Module ................................... 16
Adjustments ............................................................ 16
Three Phase Scroll Compressor ............................. 17
Phase Monitor ......................................................... 17
Service Hints ........................................................... 17
Sequence of Operation ........................................... 18
Call for Indoor Blower ............................................. 18
First Call for Cooling ............................................... 18
Second Call for Cooling .......................................... 18
Call for Heating ....................................................... 19
Loss of Utility Power ............................................... 19
Troubleshooting
52 VDC Indoor Blower Motor .................................. 20
Motor Trigger Voltage Circuit .................................. 21
Economizer Troubleshooting .............................23-26
Checking Temperature Sensor ............................... 27
Fan Blade Setting Dimensions ................................ 28
Removal of Fan Shroud .......................................... 28
R-410A Refrigerant Charge .................................... 28
Figures
Figure 1 Unit Dimensions ....................................... 8
Figure 2 Mounting Instructions ............................... 9
Figure 3 Electric Heat Clearance ......................... 10
Figure 4 Wall Mounting Instructions ..................... 11
Figure 5 Wall Mounting Instructions ..................... 11
Figure 6 Common Wall Mounting Installations ..... 12
Figure 7 Wiring Main Power ................................. 13
Figure 8 Low Voltage Connection ........................ 14
Figure 9 Measuring Trigger Voltage ..................... 21
Figure 10 Control Locations ................................... 22
Figure 11 Fan Blade Setting ................................... 28
Tables
Table 1 Troubleshooting...................................... 20
Table 2 Blower Trigger Voltage Chart ................. 21
Table – Temperature F vs. Resistance ............... 27
Table 3 Fan Blade Dimension ............................. 28
Table 4A Air Temp. Entering Outdoor Coil ............ 29
Table 4B Air Temp. Entering Outdoor Coil ............ 29
Table 5A Electrical Specifications ......................... 30
Table 5B Electrical Specifications. ........................ 30
Table 6 Indoor Blower Performance ................... 31
Manual 2100-612A
Page 2 of 31
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
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
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
ANSI American National Standards Institute
11 West Street, 13th Floor
New York, NY 10036
Telephone: (212) 642-4900
Fax: (212) 302-1286
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
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 2100-612A
Page 3 of 31
ANSI Z535.5 Definitions:
• Danger: Indicate[s] a hazardous situation which, if not avoided, will result in death or serious injury. The signal word “DANGER” is to be limited to the most extreme situations. DANGER [signs] should not be used for property damage hazards unless personal injury risk appropriate to these levels is also involved.
• Warning: Indicate[s] a hazardous situation which, if not avoided, could result in death or serious injury.
WARNING [signs] should not be used for property damage hazards unless personal injury risk appropriate to this level is also involved.
• Caution: Indicate[s] a hazardous situation which, if not avoided, could result in minor or moderate injury.
CAUTION [signs] without a safety alert symbol may be used to alert against unsafe practices that can result in property damage only.
• Notice: [this header is] preferred to address practices not related to personal injury. The safety alert symbol shall not be used with this signal word. As an alternative to “NOTICE” the word “CAUTION” without the safety alert symbol may be used to indicate a message not related to personal injury.
WARNING
This unit is heavy and requires more than one person to handle during installation and removal from the skid. Extreme caution must be taken to prevent injury to personnel and damage to the unit. Use appropriate safety equipment, including gloves when handling.
Failure to do so may result in serious injury.
Manual 2100-612A
Page 4 of 31
WALL MOUNT GENERAL INFORMATION
AIR CONDITIONING WALL MOUNT MODEL NOMENCLATURE
MODEL
NUMBER
D
CAPACITY |
36 - 3 Ton
42 - 3½ Ton
48 - 4 Ton
60 - 5 Ton
3S - 2 Stage
4S - 2 Stage
5S - 2 Stage
36 A 2 – A
REVISIONS
05 4
KW
05 - 5KW
06 - 6KW
09 - 9KW
10 -10KW
A - Right Hand
L - Left Hand
VOLTS & PHASE
A - 230/208-60-1
B - 230/208-60-3
C - 460/60-3
P X
COLOR OPTIONS
X - Beige
1 - White
4 - Buckeye Gray
X
SPECIAL FEATURES
X J
CONTROL
MODULES
J = HPS, LPS,
CCM, LAC,
Alarm Contacts,
Start Assist
C = "J" Module plus Comp. CCH
DC Free-Air Economizer
FILTER OPTIONS
P - 2" Pleated (MERV 8)
M - 2" Pleated (MERV 11)
N - 2" Pleated (MERV 13)
COIL OPTIONS
X - Standard
1 - Phenolic Coated Evaporator
2 - Phenolic Coated Condenser
3 - Phenolic Coated Evaporator
and Condenser
WARNING
UNIT FALLING HAZARD
Failure to follow this Warning could cause injury or death!
Use a machine to move the unit.
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/gain 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 2100-612A
Page 5 of 31
DUCT WORK
All duct work, supply and return, must be properly sized for the design airflow 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.
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 2 and 3.
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.
FILTERS
A 2" MERV 8 pleated throwaway filter is standard with each unit. The filter slides into position making it easy to service. This filter can be serviced from the outside by removing the filter access panel. 2" MERV 11 &
MERV 13 pleated filters are also available as optional accessories.
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.
Manual 2100-612A
Page 6 of 31
WALL MOUNTING INFORMATION
1. Two holes for the supply and return air openings must be cut through the wall as shown in Figure 2.
INSTALLATION INSTRUCTIONS
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.
WARNING
All Models covered by this Manual require ¼" clearance to the first 3 feet of duct to any combustible materials. Failure to provide this could result in fire causing damage, injury or death!
3. Concrete block walls must be thoroughly inspected to insure that they are capable of carrying the weight of the installed unit.
7. Secure rain flashing to wall and caulk across entire length of top. See Figure 2.
WARNING
UNIT FALLING HAZARD
Use only sufficiently-rated mechanical lifting means with proper rigging to raise the unit for mounting.
Failure to follow this Warning could result in injury or death!
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.
MOUNTING THE UNIT
1. These units are secured by wall mounting flanges 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 flange and the first 3 feet of supply air duct require a minimum of 1/4 inch clearance to combustible material. 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
Figure 3 for details on opening sizes.
3. Locate and mark lag bolt locations and bottom mounting bracket location. See Figure 2.
4. Mount bottom mounting bracket.
5. Hook top rain flashing, attached to front - right of supply flange for shipping, under back bend of top.
6. Position unit in opening and secure with 5/16 lag bolts; use 7/8 inch diameter flat washers on the lag bolts.
PLACEMENT
1. 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 airflow to the outdoor coil. Additional clearance may be required to meet local or national codes.
2. 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 a large object can cause obstructions to the condenser discharge air. Recirculation or reduced airflow caused by obstructions will result in reduced capacity, possible unit pressure safety lockouts and reduced unit service life.
Units with a blow through condenser, such as the D-Series units, it is recommended there be a minimum distance of 10 feet between the front of the unit and any barrier or 20 feet between the fronts of two opposing (facing) units.
Clearances Required for Service Access and Adequate Condenser Airflow
MODELS LEFT SIDE RIGHT SIDE
All covered by this Manual.
20" 20"
Minimum Clearances Required to
Combustible Materials
MODELS
SUPPLY AIR DUCT
FIRST THREE FEET
All covered by this
Manual.
1/4"
CABINET
0"
Manual 2100-612A
Page 7 of 31
FIGURE 1
Dimensions of Basic Unit for Architectural and Installation Requirements (Nominal)
Depth
(D)
Height
(H)
Supply
A B
Return
C B E F G I J K L M N O P Q R S T
D3SA/L
D36A/L
D42A/L
42.075 22.432 84.875 9.88 29.88 15.88 29.88 43.88 13.56 31.66 30.00 32.68 26.94 34.69 32.43 3.37 43.00 23.88 10.00 1.44 16.00 1.88
D4SA/L
D5SA/L
D48A/L
D60A/L
42.075 22.432 93.000 9.88 29.88 15.88 29.88 43.88 13.56 37.00 30.00 40.81 35.06 42.81 40.56 3.37 43.00 31.00 10.00 1.44 16.00 10.00
All dimensions are in inches. Dimensional drawings are not to scale.
D**A
RIGHT
HAND
UNIT
W
D
A
2.13
Side Wall
Mounting
Brackets
(Built In)
E
O
.44
SUPPLY AIR OPENING
R
F
G
Condenser
Air Outlet
BUILT IN
RAIN HOOD
4° PITCH
HEATER
ACCESS
PANEL
ELECTRIC HEAT
C. BREAKER/
DISCONNECT
ACCESS PANEL
(LOCKABLE)
VENT HOOD
DOOR
VENTILIATION
AIR
VENT HOOD
LOW VOLTAGE
ELECTRICAL
ENTRANCE
HIGH VOLTAGE
ELECTRICAL
ENTRANCE
Cond.
Air
Inlet
I
C
K
J
H
Top Rain
Flashing
Shipping
Location
Optional
Electrical
Entrances
L
M
P
RETURN AIR
OPENING
S
S
S
S
S
D**L
LEFT
HAND
UNIT
F
G
Front View
W
Condenser
Air Outlet
FRONT VIEW
2.13
VENT HOOD
DOOR
VENTILATION
AIR
H
I
C
J
K
DRAIN
A
D
Cond.
Air
Inlet
SIDE VIEW
Side View DRAIN
BUILT IN
RAIN HOOD
4° PITCH
HEATER
ACCESS
PANEL
ELECTRIC HEAT
C. BREAKER/
DISCONNECT
ACCESS PANEL
(LOCKABLE)
Side Wall
Mounting
Brackets
(Built In)
Top Rain
Flashing
Shipping
Location
VENT HOOD
Optional
Electrical
Entrances
LOW VOLTAGE
ELECTRICAL
ENTRANCE
HIGH VOLTAGE
ELECTRICAL
ENTRANCE
L
M
P
N
Q
N
Q
Back View
E
O
.44
SUPPLY AIR OPENING
BOTTOM
INSTALLATION
BRACKET
T
MIS-3352
S
R
RETURN AIR
OPENING
BACK VIEW
BOTTOM
BRACKET
S
S
S
S
MIS-3353
T
INSTALLATION
Manual 2100-612A
Page 8 of 31
1 2
7 8
1 8
4" Ty
1 8
1 2
4" Ty
1 2
7 8
Manual 2100-612A
Page 9 of 31
FIGURE 3
ELECTRIC HEAT CLEARANCE
SIDE SECTION VIEW OF SUPPLY AIR DUCT
FOR WALL MOUNTED UNIT SHOWING 1/4 INCH
CLEARANCE TO COMBUSTIBLE SURFACES.
WARNING
UNIT FALLING HAZARD
Failure to follow this Warning
& bolt the unit to the wall could cause injury or death!
Follow all mounting instructions.
Manual 2100-612A
Page 10 of 31
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 ensure 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!
WARNING
All Models covered by this Manual require ¼" clearance to the first 3 feet of duct to any combustible materials. Failure to provide this could result in fire causing damage, injury or death!
SUPPLY AIR
OPENING
RETURN AIR
OPENING
FIGURE 4
WALL MOUNTING INSTRUCTIONS
SEE FIGURE 2 – MOUNTING INSTRUCTIONS
FACTORY SUPPLIED
RAIN FLASHING.
WALL STRUCTURE
SUPPLY AIR
DUCT
SUPPLY AIR
OPENING
RETURN AIR
OPENING
WOOD OR STEEL SIDING
WOOD FRAME WALL INSTALLATION
BOTTOM MOUNTING
BRACKET. MOUNT ON
WALL BEFORE
INSTALLING UNIT.
SIDE VIEW MIS-548 A CONCRETE BLOCK WALL INSTALLATION
MIS-549 B
FIGURE 5
WALL MOUNTING INSTRUCTIONS
ATTACH TO TOP
PLATE OF WALL
SEE UNIT DIMENSIONS, FIGURE 2,
FOR ACTUAL DIMENSIONS.
E + 1.000
B
1.000
1.000" CLEARANCE
ALL AROUND DUCT
INTERIOR FINISHED WALL
OVER FRAME
1.000" CLEARANCE
ALL AROUND DUCT
SUPPLY DUCT
OPENING
A
I
RETURN DUCT
OPENING
C
EXTERIOR FINISH WALL
OVER FRAME
K
2 x 6
FRAMING MATERIAL
2 x 4'S, 2 x 6'S &/OR
STRUCTURAL STEEL
ATTACH TO BOTTOM
PLATE OF WALL
THIS STRUCTURAL MEMBER
LOCATED TO MATCH STUD
SPACING FOR REST OF WALL.
A SECOND MEMBER MAY BE
REQUIRED FOR SOME WALLS.
Manual 2100-612A
Page 11 of 31
FIGURE 6
COMMON WALL MOUNTING INSTALLATIONS
OUTSIDE
WALL
RAFTERS
FINISHED CEILING SURFACE
SUPPLY AIR DUCT
W/ GRILLE
RETURN AIR
OPENING W/ GRILLE
OUTSIDE
WALL
FREE AIR FLOW
NO DUCT
SUPPLY DUCT MAY BE LOCATED IN AN ATTIC
OR BELOW CEILING RAFTERS AS SHOWN
RAFTERS
SUPPLY AIR DUCT
FINISHED CEILING SURFACE
RETURN AIR
OPENING W/ GRILLE
DUCTED SUPPLY
RETURN AT UNIT
SUPPLY DUCT MAYBE LOCATED IN AN ATTIC
OR BELOW CEILING RAFTERS AS SHOWN
RAFTERS
SUPPLY AIR DUCT
OUTSIDE
WALL
FINISHED
CEILING SURFACE
WALL SLEEVE
RETURN AIR
SPACE
FALSE WALL
RETURN AIR GRILLE
OUTSIDE
WALL
FALSE WALL INSTALLATION
RAFTERS
SUPPLY AIR DUCT
LOWERED
CEILING
CLOSET WALL
SUPPLY AIR
GRILLE
FINISHED CEILING
SURFACE
RAISED FLOOR
RETURN AIR
CLOSET INSTALLATION
MIS-550 B
Manual 2100-612A
Page 12 of 31
WIRING – MAIN POWER
All Models covered by this
Installation Instruction require dual power sources. One is the VAC utility power to run the compressor and outdoor fan motor. Two, is 52 Vdc power to operate the indoor blower and economizer.
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. 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 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.
FIGURE 7
WIRING MAIN POWER
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 5A & 5B for Electrical Specifications. See
Figure 7 to reference VAC and VDC Landing Points.
WIRING – LOW VOLTAGE WIRING
Bard recommends usage of Bard MV4000 Controller, plus the MVH-1 Humidistat Accessory for application to these models. Since the control system for the economizers is dry bulb differential, to maximize the hours of free cooling, the MVH-1 Humidistat Accessory will limit the internal shelter humidity levels by forcing mechanical cooling when humidity levels rise above the setpoint. See Figure 8 for the connection diagram.
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
208
253 – 216
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).
VAC FIELD POWER LANDS ON
UPPER CIRCUIT BREAKER
GROUND CONNECTION
52 VDC FIELD POWER LANDS ON
LOWER CIRCUIT BREAKER. (+)
ON BOTTOM AND (-) ON TOP
Manual 2100-612A
Page 13 of 31
AC UNIT 1
LOW VOLTAGE TERMINAL
STRIP CONNECTIONS
A
4
5
Y1
F
8
9
6
7
Rt
R
C
3
10
1
Y2
G
E
2
W
Y
Bard MVH-1
Humidistat accessory
C
G
DEHUM
DEHUM
1
2
REMOVE JUMPER WHEN
CONNECTING GEN CONTACT
REMOVE JUMPER WHEN CONNECTING
FIRE SHUTDOWN CONTACT
AC UNIT 2
LOW VOLTAGE TERMINAL
STRIP CONNECTIONS
8
9
5
4
A
F
Y
C
R
Rt
10
G
Y2
Y
W
6
7
1
E
2
3
FIGURE 8
LOW VOLTAGE CONNECTIONS
OPTIONAL SHELTER SMOKE ALARM CONTACTS
(REMOVE R/RT JUMPER FROM UNITS LOW VOLTAGE TERMINAL STRIP)
MV4000 UNIT 1
TERMINAL BLOCK
R
C
A
4
5
Y
F
6
DIRTY FILTER
ALARM (NC)
MV4000
MV4000
MAIN BOARD
8
9
ECON FAIL
ALARM (NC)
NOTE: DC BACK-UP POWER
IS POLARITY SENSITIVE AND
MUST BE CONNECTED AS SHOWN
OR CONTROLLER WILL NOT
OPERATE ON DC POWER ONLY
48VDC
W
Y1
Y2
G
R
C
+
_
UNIT 1
OPTIONAL
48VDC
LOCKOUT ALARM
LOCKOUT ALARM
3
E
F
2
3
E
F
2
3
ALARM
BOARD
GEN RUN ALARM/
ECON SHUTDOWN
FIRE/SMOKE
ALARM CIRCUIT
"NC" CONTACTS -
OPEN ON ALARM
NC CONTACTS
OPEN ON ALARM
NC CONTACTS
OPEN ON ALARM
2 COMP RUN ALARM
TERMINAL BLOCK
REMOVE
JUMPER
1
F1
F2
FIRE/
SMOKE
REMOVE
JUMPER
2
MV4000 UNIT 2
TERMINAL BLOCK
9
8
ECON FAIL
ALARM (NC)
NOTE: ALL SENSORS ARE
POLARITY SENSITIVE. COPPER
LEAD MUST CONNECT TO
CU, AND SILVER MUST
LEAD TO AG
OPTIONAL FIELD INSTALLED
25 FOOT TEMPERATURE
SENSORS, BARD PART
NUMBER 8612-023
6
5 DIRTY FILTER
ALARM (NC)
Y
C
R
4
A
F
OPTIONAL FIELD INSTALLED
HUMIDITY CONTROLLER
"NO" CONTACTS - CLOSE ON RISE
G2
G1
HUMIDITY
CONTROLLER
H1
H2
ADVANCE
Y1
W
C
R
G
Y2
LOCAL
CU
AG
REM 1
CU
AG
REM 2
CU
AG
OPTIONAL SHELTER SMOKE ALARM CONTACTS
UNIT 2
COPPER
SILVER
COPPER
SILVER
COPPER
SILVER
MIS-3571 A
Manual 2100-612A
Page 14 of 31
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 significant 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 flammable.
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 fill 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 significantly at warmer temperatures. Once a cylinder or line is full of liquid, any further rise in temperature will cause it to burst.
Manual 2100-612A
Page 15 of 31
START UP (Continued)
IMPORTANT INSTALLER NOTE
For improved start up performance wash the indoor coil with a dish washing detergent.
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, 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 the compressor is locked out due to
HPC or LPC sequences as described.
Manual 2100-612A
Page 16 of 31
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 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
THREE PHASE SCROLL COMPRESSOR
START UP INFORMATION
Scroll 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 ZP 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.
START UP (Continued)
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.
SERVICE HINTS
1. Caution owner/operator 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. 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 airflow circulation is essential.
WARNING
Any removal of sheet metal panels from this unit exposes you to possible lacerations. Wearing gloves is highly recommended, along with proper placement of removed panels to limit others exposure to them. Never store removed panels overhead, as it creates a falling hazard!
Manual 2100-612A
Page 17 of 31
SEQUENCE OF OPERATION
This product design allows for Forced Emergency
Ventilated Cooling anytime “shore power” (VAC power from the utility company) is lost. The internal controls within this unit automatically recognize this, and energize the indoor blower motor, and powers the acutator to open the economizer to bring in outdoor air. The power utilized during this time is the stored battery power from the equipment shelter.
The indoor blower is powered via 52 Vdc Power 100% of the time. Contact closures/opening between the
ORANGE and BLACK control signal wires trigger the motor to start and stop. The speed of the motor (airflow) is regulated by the 0-10 VDC input voltage between the
“RED” and “BLACK” control wires. To control this
0-10 Vdc speed signal, potentiometers are used to reduce the triggering voltage at the various inputs needed for the specific model. Refer to Table 2 to view these varying required voltage inputs.
CALL FOR INDOOR BLOWER
On a call for the indoor blower, “G” signal is sent from the unit controller/thermostat to the unit. The “G” signal will actuate the blower relay, causing contacts to close between the “ORANGE” and “BLACK” motor control wires. This along with a 0-10 VDC motor trigger voltage input between the “RED” and “BLACK” motor control wires, will cause the motor to run. In “blower only” operation, the motor trigger voltage is identical to the ecomomizer airflow volume. The motor trigger voltage is controlled by the Econ Potentiometer.
FIRST CALL FOR COOLING
On the first call for cooling, “G” and “Y1” signals are sent from the unit controller/thermostat to the unit. The
“G” signal will actuate the indoor blower time delay relay causing a contact closure between the “ORANGE” and “BLACK” motor control wires. The “Y1” signal travels to the Economizer Logic Control, which then makes a decision to cool by either opening the outside damper, or to run the compressor based upon the indoor to outdoor DB temperature differential.
• If the indoor-to-outdoor temperature differential is great enough, the economizer logic control opens the damper actuator to provide free cooling. The economizer logic control will modulate the damper position to only allow a minimum supply air temperature of 55°F.
NOTE: If the outdoor temperature is below 55°F, the economizer logic control outputs a signal from the energy module “IF” terminal, and sends it to the “BLOWER
INTERLOCK RELAY”. This in turn energizes the
PART LOAD SPEED RELAY. This causes the “ECON
SPEED POTENTIOMETER” to drop out of the blower trigger voltage circuit, and replaces it with the PL Speed
Potentiometer, which in turn changes the indoor blower speed (by changing the motor trigger voltage).
• If the indoor-to-outdoor temperature differential is not great enough, the economizer logic control then forwards the “Y1” signal onto the Compressor
Control Module, and the compressor and outdoor fan will start running in mechanical cooling operation. Simultaneously, the “Y1” signal travels to the PART LOAD SPEED RELAY. This causes the “ECON SPEED POTENTIOMETER” to drop out of the blower trigger voltage circuit, and replaces it with the PL Speed Potentiometer, which in turn changes the indoor blower speed (by
changing the motor trigger voltage).
SECOND CALL FOR COOLING
A “Y2” signal is sent from the controller/thermostat to the economizer logic control. The Economizer Logic
Control will then:
• If operating strictly on Economizer, will then start the compressor and outdoor fan by forwarding the “Y1” signal onto the Compressor Control
Module, and will operate Free Cooling, along with Mechanical Cooling. At the same time, the
“Y1” signal is also forwarded to the PART LOAD
SPEED RELAY. This causes the “ECON SPEED
POTENTIOMETER” to drop out of the blower trigger voltage circuit, and replaces it with the PL
Speed Potentiometer, which in turn changes the indoor blower speed/CFM.
• If operating in mechanical cooling mode, and has been running for a minimum of 4 minutes, the Economizer Logic Control will forward the
“Y2” signal onto the compressor staging solenoid
(2-stage equipment only), and also onto the
FULL LOAD SPEED RELAY. When this relay energizes, it causes the “PART LOAD SPEED
POTENTIOMETER” to drop out of the blower trigger voltage circuit, and replaces it with the FL
SPEED POTENTIOMETER, which in turn changes the indoor blower speed/CFM.
NOTE: If installed with a lead/lag controller, and there is more than one unit, a “Y2” call may go to a second unit, prior to this one being called for. This allows for dual economizer operation prior to mechanical cooling
demand being applied.
Manual 2100-612A
Page 18 of 31
CALL FOR HEATING
On a call for heating, “G” and “W” signals are sent from the unit controller/thermostat to the unit. The “G” signal energizes the blower relay, starting the indoor blower. The “W” signal travels through the electric heater safety limit, and if not open, then travels to the heater contactors, pulling-in the contactors, and energizing the unit strip heat.
LOSS OF UTILITY POWER
On the loss of A/C power to the unit:
• Mechanical (compressor) cooling and heating are no longer available.
• The indoor blower is forced to run on economizer airflow.
• The economizer is energized to the open (but will still modulate to a 55° supply air temperature).
Upon loss of power, all contacts on the “POWER LOSS
RELAY” switch.
• This closes the auxillary contacts for the
“ORANGE” and “BLACK” blower controls wires which ensures the indoor blower either starts/stays running (in economizer mode airflow)
• It also switches the economizer outdoor air temperature sensor to now only see the 15,000 ohm resistor (making economizer logic think it is
60°F outdoor temperature).
• It also causes the 48 Vdc-to-24Vdc Converter to become energized, allowing 24 Vdc power to travel to the “ECON CHANGEOVER RELAY”.
• It also allows 48 Vdc power to travel to the
“ECON CHANGEOVER RELAY COIL” and causes it to switch contact closures.
With the “ECON CHANGEOVER RELAY” energized, this now switches the power feeding to the Economizer
Logic Control from 24 VAC power, to 24 Vdc power, whichs allows the economizer to continue operation of the damper actuator on Vdc power. It will monitor the
Supply Air Temperature sensor, and modulate the damper blade to maintain a 55°F discharge air temperature.
Manual 2100-612A
Page 19 of 31
TROUBLESHOOTING
TROUBLESHOOTING THE 52 VDC INDOOR BLOWER MOTOR
The blower motor of the Bard “D Series” products is powered by 52 Vdc power, and is controlled with 0-10 Vdc power to determine the operating airflow. If the motor fails to run, the following steps should diagnose the problem.
Motor
Connection
Pin Number
1
2
3
4
5
6
7
8
9
Color
Red
Yellow
Blue
Orange
Black
Red
Black
TABLE 1
Function Description of Application
SPEED INPUT 0-10 Vdc input, varying voltage input between 0-10 Vdc dictates the motor speed/CFM delivery
FOUT
FAULT
RUN
CONTROL
GROUND
Not presently used
Not presently used
Contact closure to "black" (Pin #5) with 52 VDC power on Pins #8 & #9, with 0-10 Vdc power applied to Red (Pin #1) will cause motor to run
Control Ground for both start-stop function and speed control voltage
52 VDC (+)
52 VDC (-)
"+" Vdc power supplied to motor
"-" Vdc power supplied to motor
TROUBLESHOOTING THE 52 VDC
INDOOR BLOWER MOTOR
1. Verify that you truly have the Vdc power correctly orientated to the unit circuit breaker. Keep in mind that most cell sites are -48 Vdc powered (meaning they are circuit breaker protecting the (-) leg of
power). You can confirm this by testing with your electrical meter set to DC Volts, and ensure that with on your meter, the red wire is connected to the volts terminal, and the black wire is connected to the common terminal, that when connected to the 52 Vdc supply wires, you aren't reading -52 Vdc, but rather 52 Vdc. (IF STILL IN
DOUBT, SWITCH THE FEED WIRES TO THE
DC CIRCUIT BREAKER AROUND, AND SEE
IF THE BLOWER WILL NOW OPERATE.)
2. Ensure you have a 52 Vdc power to the motor connector terminals. (Red wire on Pin #7 and
Black wire on Pin #9).
3. Ensure you have a contact closure between the blower motor “orange” and “black” control wires by using your meter in the ohms scale to ensure continuity across these two wires.
4. Using your voltmeter (set to Volts DC) to measure across the “red” control wire on Pin #1, and the
“black” control ground wire on Pin #5 to ensure you have a motor trigger voltage present. (Go to next section, if no voltage observed).
5. Shut off all power to the unit. Remove upper front service door and verify the connectors between the motor driver and the motor are connected, and have not come loose in transit, or through operational vibration.
Manual 2100-612A
Page 20 of 31
TROUBLESHOOTING
TROUBLESHOOTING MOTOR TRIGGER VOLTAGE CIRCUIT
The motor trigger voltage circuit is controlled through a voltage divide circuit. What this means is the 52 Vdc power is being trimmed/reduced by a series of resistors and potentiometers (variable resistor) to set the motor trigger voltage to match the required unit CFM.
In the case of the Bard “D Series”, the 820 ohm resistor does the majority of this voltage reduction. The three (3) different potentiometers are pulled in/out of the trigger control circuit based upon the mode of operation that the unit is operating (accomplished through the PL BLOWER RELAY and FL BLOWER RELAY) as the regulating part of the voltage reduction.
1. Connect multimeter “VOLTS LEAD” to red wire on RH side of the 820 ohm resistor (located just below DC circuit breaker). (Side of resistor terminal block that has single red wire). See
Figure 9.
2. Connect multimeter “COMMON LEAD” to black lead of blower relay on Terminal #1. See
Figure 9.
3. Refer to Table 2 paying attention to the present mode of operation to set the varied motor trigger voltages.
FIGURE 9
MEASURING TRIGGER VOLTAGE
METER COMMON WIRE CLIPPED
ONTO BLACK WIRE AT BLOWER
RELAY #1 TERMINAL
METER "VOLTS" WIRE CLIPPED
ONTO SINGLE RED WIRE ON
TERMINAL BLOCK
MULTI-METER SET TO
READ "DC VOLTS"
Model
D3SA/D3SL
D4SA/D4SL
D5SA/D5SL
D36A/D36L
D42A/D42L
D48A/D48L
D60A/D60L
Blower
Only
Same as
Economizer
Mode
Same as
Economizer
Mode
TABLE 2
BLOWER TRIGGER VOLTAGE CHART
Economizer
Mode
(CFM / Vdc
Trigger
Voltage)
Economizer Mode below 40°F
(CFM / Vdc
Trigger Voltage )
1st Stage Cooling
(CFM / Vdc
Trigger Voltage)
2nd Stage Cooling
(CFM / Vdc
Trigger Voltage)
1800 / 8.3
1800 / 8.3
800 / 2.9
1100 / 4.1
1100 / 4.1
1100 / 4.1
1250 / 4.9
1600 / 6.4
1600 / 6.4
800 / 2.9
1100 / 4.1
1100 / 4.1
1100 / 4.1
1250 / 4.9
1600 / 6.4
1600 / 6.4
1100 / 4.1
1600 / 6.4
1600 / 6.4
1250 / 4.9
1400 / 5.6
1700 / 7.0
1700 / 7.0
Electric Heat
1800 / 7.6
1800 / 7.6
Manual 2100-612A
Page 21 of 31
FIGURE 10
CONTROL LOCATIONS
108
ELECTRIC HEATER
CONTACTORS
VAC CIRCUIT
BREAKER
VAC CIRCUIT
BREAKER
820Ω RESISTOR
ECONOMIZER
LOGIC CONTROL
DC-TO-DC
CONVERTOR
COMPRESSOR
CONTACTOR
PTCR
COMPRESSOR/
FAN CAPACITOR
24 VAC TRANSFORMER
"L1"
"L1"
L1 L2
T1 T2
#1
#1
ECONOMIZER POTENTIOMETER
BLOWER INTERLOCK RELAY
FL SPEED POTENTIOMETER
BLOWER RELAY
ECON BLOWER RELAY
FL SPEED POTENTIOMETER
PART LOAD
SPEED RELAY
FULL LOAD
SPEED RELAY
FILTER RELAY
ALARM RELAY
ECON CHANGE
OVER RELAY
POWER LOSS RELAY
15KΩ RESISTOR
DIRTY FILTER
SWITCH
COMPRESSOR CONTROL
MODULE
LOW VOLTAGE
TERMINAL STRIP
MIS-3570
Manual 2100-612A
Page 22 of 31
ECONOMIZER TROUBLESHOOTING
Problem
The Economizer
/ Mechanical
Cooling Not
Operating
Possible Cause
No input power
Setup not complete
Brownout
Action
Using a voltmeter set to read AC voltage, verify that there is 24 VAC +/- 20% (19 VAC – 29 VAC) as measured at the “R” and “C” terminals on the Economizer Logic Control terminal strip on the base unit. If no voltage, check transformer output voltage at RTU. If 24 volts not present, check primary input power to transformer. If voltage present, check transformer circuit breaker, and check transformer for open coil.
If no voltage present, check primary input power to RTU, fuses, disconnect, circuit breaker.
If the display reads “Setup Incomplete”, then not all of the required setup parameters values for minimum damper position and zip code have not been entered. Enter required information in Settings menu. See setup information in IOM manual.
If voltage is below 19 volts, then the Economizer Logic Control may be in Brownout Protection mode.
This mode diables the compressors to protect them from low voltage operation damage. When the power is back to normal the Economizer and RTU will operate normally (see Brownout Below).
In acceptance test or manual mode
If the Yellow LED is lighted, then the Economizer Logic Control is in a mode other than Automatic. End
Mode by finding menu Item “Return to Automatic”. Refer to menu flow diagram.
There are No
Characters
Displayed on the Economizer
Display
The Display
Shows
“Brownout”
The Display
Shows “Setup
Incomplete”
There is No Free
Cooling
No input power
Ambient temperature below display range
Input voltage is below 18VAC / connected load is too much for transformer
The initial setup of the
Economizer has not completed
Additional devices have been added after initial setup
Display shows
“OAT sensor out of range economizing is disabled”
Display shows
“OAT Sensor not detected economizing is disabled”
Using a voltmeter set to read AC voltage, verify that there is 24 VAC +/- 20% (19 VAC – 29 VAC) as measured at the “R” and “C” terminals on the Economizer Logic Control terminal strip on the base unit. If no voltage, check transformer output voltage at RTU. If 24 volts not present, check primary input power to transformer. If voltage present, check transformer circuit breaker, and check transformer for open coil.
If no voltage present, check primary input power to RTU, fuses, disconnect, circuit breaker.
Below this value, the display may not be clearly visible. It should still control properly even though the display may be blank below this temperature.
Using a voltmeter set to read AC voltage, verify that that the voltage is low. If the voltage is low check primary voltage into the RTU. If primary voltage is below the rated RTU voltage as listed on nameplate or product documentation, the primary power is in a brownout state. If voltage is within specified range, it is possible that the load on the transformer is larger than VA rating. Verify connected current, if OK, consider replacing transformer.
The Economizer Logic Control requires parametizing of specific settings prior to operation of the economizer or compressors. As a minimum the Vent Min Pos and ZIP Code / Postal Code need to have a value set and entered. If additional devices are attached (e.g. CO2, EF,..) then additional parametizing is required.
Some additional devices that may be added at anytime during the life of the Economizer Logic Control will require additional setup. Upon connection of these devices the economizer will notify that the device has been detected and will prompt setup. Until setup is complete, the Economizer Logic Control will function as if the devices are not there. Proceed to Settings menu and look for menu items that have a blank value, press OK and enter value. Once all values have been paramatized, the Economizer Logic
Control will function as intended.
Sensor is returning a value that is out of the predetermined range. This disables the economizer functions and outdoor air damper will return/remain at minimum position. This is a mandatory sensor and must be functional! Repair or replace. Verify sensor value by disconnection sensor leads from
Economizer Logic Control and measure resistance with Ohm meter across sensor leads and compare to 10K type 2 Thermistor Table values to measured values to the value of a temperature instrument. If values are significantly different, replace sensor.
Sensor is not present/not detected. This disables the economizer functions and damper will return/ remain at minimum position. This is a mandatory sensor and must be functional! Repair or replace.
Verify sensor value by disconnection sensor leads from Economizer Logic Control and measure resistance with Ohm meter across sensor leads and compare to 10K type 2 Thermistor Table value to measured value to the value of a temperature instrument. If value is close, determine if there is any intermediate wiring. If so, check continuity. If all checks are good, attach sensor to Economizer Logic
Control and see if it is detected. If not detected, try another 10k type 2 sensor. If still not detected, replace Economizer Logic Control.
Manual 2100-612A
Page 23 of 31
ECONOMIZER TROUBLESHOOTING
Problem
A Sensor is Not
Detected or Out of Range
Possible Cause
Display shows
“SAT sensor out of range economizing disabled”
There is No Free
Cooling
Display shows
“SAT sensor not detected economizing disabled”
Action
Sensor is returning a value that is out of the predetermined range. This disables the economizer functions and outdoor air damper will return/remain at minimum position. This is a mandatory sensor and must be functional! Repair or replace. Verify sensor value by disconnecting sensor leads from
Economizer Logic Control and measure resistance with Ohm meter across sensor leads and compare to 10K type 2 Thermistor Table values to measured values to the value of a temperature instrument. If values are significantly different, replace sensor.
Sensor is not present/not detected. This disables the economizer functions and damper will return/ remain at minimum position. This is a mandatory sensor and must be functional! Repair or replace. Verify sensor value by disconnecting sensor leads from Economizer Logic Control and measure resistance with
Ohm meter across sensor leads and compare to 10K type 2 Thermistor Table value to measured value to the value of a temperature instrument. If value is close, determine if there is any intermediate wiring.
If so, check continuity. If all checks are good, attach sensor to Economizer Logic Control and see if it is detected. If not detected, try another 10k type 2 sensor. If still not detected, replace Economizer Logic
Control.
The Economizer is in another operating mode
OAT sensor
SAT sensor
RAT Sensor.
Display shows
“RAT sensor not detected operation by
OAT dry bulb”
RAT Sensor.
Display shows
“RAT sensor not detected operation by
OAH enthalpy”
RAT Sensor.
Display shows
“RAH sensor detected but
RAT sensor not detected”
Check Status screen for current operating mode or state. Please see sequence description for more information.
Please see troubleshooting action under Problem “There is no Free Cooling”.
Please see troubleshooting action under Problem “There is no Free Cooling”.
Sensor previously detected is not present. Previously confi gured for differential dry bulb, now economizing will be based on single OAT dry bulb. Verify sensor value by disconnection sensor leads from Economizer Logic Control and measure resistance with Ohm meter across sensor leads and compare to 10K type 2 Thermistor Table value to measured value to the value of a temperature instrument. If value is close, determine if there is any intermediate wiring. If so, check continuity. If all checks are good, attach sensor to Economizer Logic Control and see if it is detected. If not detected, try another 10k type 2 sensor. If still not detected, replace Economizer Logic Control.
Sensor previously detected is not present. Previously configured for differential enthalpy, now economizing will be based on single enthalpy. Verify sensor value by disconnecting sensor leads from
Economizer Logic Control and measure resistance with Ohm meter across sensor leads and compare to
10K type 2 Thermistor Table value to measured value to the value of a temperature instrument. If value is close, determine if there is any intermediate wiring. If so, check continuity. If all checks are good, attach sensor to Economizer Logic Control and see if it is detected. If not detected, try another 10k type
2 sensor. If still not detected, replace Economizer Logic Control.
This configuration is not allowed. You need an RAT sensor for differential enthalpy high limit changeover.
Verify that RAT sensor installed and correctly wired. Troubleshoot as above for RAT.
Manual 2100-612A
Page 24 of 31
ECONOMIZER TROUBLESHOOTING
Problem
Alarm “Y2
Present Without
Y1”
Alarm “Heat and Cool Both
Present”
Alarm “SAT
Drop for CC1
Insufficient
Cooling System
Problem”
Alarm “SAT
Drop for CC2
Insufficient
Cooling System
Problem”
Alarm “SAT
Should Be
Lower”
Alarm “Damper
Pos Value
Missing”
Alarm “Damper is Stuck”
Possible Cause
Potential wiring or thermostat problem
Potential wiring or thermostat problem
Potential compressor, refrigerant, or supply fan problem
Action
Thermostat input to Economizer Logic Control has energized Y2 (2nd stage cooling) and has not energized Y1 (1st stage cooling). This configuration is not allowed. The economizer will recognize this and will treat Y2 signal as if it is Y1 and will energized 1st stage cooling (Mechanical or Free Cooling).
Check to see if wires are reversed between thermostat and economizer input. Verify continuity to see if circuit could be open or wire could be broken. Test to see thermostat 1st stage relay is closing (Y1 has
24 VAC). Make sure there are no jumpers between R and Y2.
This alarm indicates that 24 VAC is at both terminal Y1 and W1 on the Economizer Logic Control. Check for wiring problems. Note: this alarm is disabled when Heat Pump operation has been turned to On in
Settings menu.
The Economizer Logic Control reads the SAT value just before energizing 1st stage mechanical cooling.
After compressor has started and 4 minutes have elapsed, SAT value is again checked. If SAT has not dropped by at least 5°F then this alarm is generated. Some possibilities are:
• Filters or coils are dirty or blocked – inspect.
• SAT sensor in location where are is not mixed - perform temperature traverse.
• Indoor fan is inoperable - check relay, belt, motor, bearings.
• Condenser fan is inoperable - check relay, motor, head pressure control.
• Compressor is faulty (internal damage) - check amperage, pressures.
• Contactor energizes but compressor is out on internal/external overload.
• High voltage problem to compressor -check wiring, phases, contactor.
• Circuit 1 is low on refrigerant - check charge.
Potential compressor, refrigerant, or supply fan problem
The Economizer Logic Control reads the SAT value just before energizing 2nd stage mechanical cooling.
After compressor has started and 4 minutes have elapsed, SAT value is again checked. If SAT has not dropped by at least 5°F then this alarm is generated. Troubleshoot as above for 1st stage.
Potential damper, linkage, or actuator problem
Actuator or wiring problem
Damper or linkage problem
When in Free Cooling if the SAT is not within 10°F or the OAT, then this alarm will be generated.
Exception when the damper is modulated to obtain the SAT setpoint of 55°F. Some possibilities are:
• Check damper linkages.
• Check actuator clamp / interface between damper is secure.
• Check that damper blades secured to damper shaft properly.
• Check that both outside air damper and return damper stroke properly.
• Check that return damper closes tightly when outdoor damper is full open.
• Check that OAT sensor is in the airflow path and subjected to solar radiation.
• Check that SAT sensor is in a location that airflow is mixed.
The connected actuator must have a feedback wire terminated at ACT5 on the Economizer Logic
Control. The range should be between 2-10 VDC. Verify voltage with multimeter. Remove feedback wire and check voltage between terminal C and the feedback wire. If no voltage, replace actuator.
The feedback from the actuator is used to determine the position of the damper. If the Economizer Logic
Control commands the damper to drive open to a designated % and the feedback measured does not achieve the commanded value, then this alarm will be generated.
• Check damper linkages.
• Check to see if anything is in the way of damper.
• Check that actuator limit stop not adjusted to smaller angle.
Damper rotation below what is allowed
If the damper rotation is less than 85% (77°) and the Economizer Test has not been run to scale the output to the damper travel, this alarm may occur.
Alarm
“Compressor 1
Not Detected”
Alarm
“Compressor 2
Not Detected”
CC1 output circuit is open
When the Economizer Logic Control is first powered, it detects the presence of the compressor control circuit. If the circuit is detected as open, this alarm will be generated. Check all wiring, connectors, and devices in series between CC1 and contactor coil.
Manual 2100-612A
Page 25 of 31
ECONOMIZER TROUBLESHOOTING
Problem
Alarm
“Compressor 1
Not Detected”
Alarm
“Compressor 2
Not Detected”
There is No
Integrated
Cooling
Alarm “Energy
Module is
Missing. Module
Functions
Disabled”
Alarm “2
Speed Fan Not
Detected”
Possible Cause Action
Compressor safety open
Wiring or indoor fan relay problem
Inability to auto detect
• Check Low Pressure control.
• Check High Pressure control.
• Check Compressor Current protector.
Compressor contactor coil bad Check that there is resistance through the coil and compare to min requirements in technical document.
Inability to auto detect
If all items above have been verified good and circuit continuous, then in Settings menu under Devices 1, change Compressor Qty from Auto to 1 or 2 to match number of compressors in the RTU. Once the Qty selected, the alarm will clear, the user must verify the compressor does enable when it is supposed to.
Potential damper, linkage, actuator problem, or wiring problem
Damper rotation not scaled
SAT Y2 limit
In order for the Economizer Logic Control to enter into Integrated Cooling mode, the damper must be close to full open (> 85%) and Y2 must be enabled. See sequence of operation for more information.
Check damper and linkage components as addressed above. Check Y2 signal.
If the damper rotation is less than 85% (77°) and the Economizer Test has not been run to scale the output to the damper travel, then Integrated cooling will not ever occur.
If the SAT Y2 Limit is on in Settings menu, then Integrated Cooling will be disabled when SAT is below the specified temperature. See sequence of operation for more information.
In time delay
Economizer
Logic Control cannot detect the Energy
Module, which was previously detected as installed
Energy Module not detected
There is a time delay after the damper reaches open till 2nd stage Integrated Cooling can occur. See sequence of operation for more information.
The following functions (if they were utilized) will be disabled:
• Purge.
• Remote damper override potentiometer.
• CO2 sensing and Demand Control Ventilation.
• Low Speed indoor fan control.
Full unplug per mounting instructions. Check plug and socket for any debris. Clean carefully if necessary. Re-install Energy Module per IOM manual instructions until you hear a snap indicating it is locked into place. If this does not resolve problem, replace Economizer Logic Control.
Check that the Energy Module is Connected in the “Present Devices” menu. If not troubleshoot as above.
When the Economizer Logic Control is first powered, it detects the presence of the Indoor Fan control circuit. If the circuit is detected as open, this alarm will be generated. Check all wiring, connectors, and relay coil. Check that there is resistance through the coil and compare to min requirements in technical document.
If the two potential problems above have been verified, then there may be a problem with auto detecting.
In “Settings” menu under Devices 1, verify the set value is Auto or Available. If set on Auto try setting value to Available. Once set to Available, the alarm will clear, the user must verify proper operation of IF output.
Manual 2100-612A
Page 26 of 31
CHECKING ECONOMIZER
TEMPERATURE SENSORS
1. Disconnect temperature sensor economizer logic control.
2. With sensor in known ambient temperature, use an ohmmeter and measure the resistance of the sensor.
Also use ohmmeter to check for short or open.
3. Check resistance reading to chart of resistance. Use sensor ambient temperature. (Tolerance of part is
± 10%.)
4. If sensor resistance reads very low, then sensor is shorted and will not allow proper operation.
5. If sensor is out of tolerance, shorted, open or reads very low ohms then it should be replaced.
TEMPERATURE F VS. RESISTANCE R OF TEMPERATURE SENSOR
85371
82699
80121
77632
75230
72910
70670
68507
122089
118108
114272
110575
107010
103574
100260
97064
93981
91008
88139
66418
64399
62449
60565
58745
R
196871
190099
183585
177318
171289
165487
159904
154529
149355
144374
139576
134956
130506
126219
76.0
77.0
78.0
79.0
80.0
81.0
82.0
83.0
84.0
85.0
86.0
87.0
88.0
65.0
66.0
67.0
68.0
69.0
70.0
71.0
72.0
73.0
74.0
75.0
F
53.0
52.0
53.0
54.0
55.0
56.0
57.0
58.0
59.0
60.0
61.0
62.0
63.0
64.0
38.0
39.0
40.0
41.0
42.0
43.0
44.0
45.0
46.0
47.0
48.0
49.0
50.0
27.0
28.0
29.0
30.0
31.0
32.0
33.0
34.0
35.0
36.0
37.0
F
13.0
14.0
15.0
16.0
17.0
18.0
19.0
20.0
21.0
22.0
23.0
24.0
25.0
26.0
4.0
5.0
6.0
7.0
0.0
1.0
2.0
3.0
-11.0
-10.0
-9.0
-8.0
-7.0
-6.0
-5.0
-4.0
-3.0
-2.0
-1.0
8.0
9.0
10.0
11.0
12.0
F
-25.0
-24.0
-23.0
-22.0
-21.0
-20.0
-19.0
-18.0
-17.0
-16.0
-15.0
-14.0
-13.0
-12.0
27577
26823
26092
25383
24696
24030
23384
22758
37652
36583
35548
34545
33574
32634
31723
30840
29986
29157
28355
22150
21561
20989
20435
19896
R
56985
55284
53640
52051
50514
49028
47590
46200
44855
43554
42295
41077
39898
38757
10247
10000
9760
9526
9299
9077
8862
8653
13474
13137
12810
12492
12183
11883
11591
11307
11031
10762
10501
8449
8250
8057
7869
7686
R
19374
18867
18375
17989
17434
16984
16547
16122
15710
15310
14921
14544
14177
13820
114.0
115.0
116.0
117.0
118.0
119.0
120.0
121.0
103.0
104.0
105.0
106.0
107.0
108.0
109.0
110.0
111.0
112.0
113.0
122.0
123.0
124.0
F
89.0
90.0
91.0
92.0
93.0
94.0
95.0
96.0
97.0
98.0
99.0
100.0
101.0
102.0
4274
4182
4093
4006
3921
3838
3757
3678
5446
5326
5208
5094
4982
4873
4767
4663
4562
4464
4367
3601
3526
3452
R
7507
7334
7165
7000
6840
6683
6531
6383
6239
6098
5961
5827
5697
5570
Manual 2100-612A
Page 27 of 31
TROUBLESHOOTING
FAN BLADE SETTING DIMENSIONS
Shown in Figure 11 is the correct fan blade setting for proper air delivery across the outdoor coil. Refer to
Table 3 for unit specific 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 11
FAN BLADE SETTING
AIRFLOW
MIS-1724
"A"
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 efficiency ratings were determined by testing with this refrigerant charge quantity.
The following pressure tables show nominal pressures for the units. Since many installation specific situations can affect the pressure readings, this information should only be used by certified 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.
TABLE 3
FAN BLADE DIMENSION
Model
All Covered by this Manual
Dimension A
1.75"
Manual 2100-612A
Page 28 of 31
Model
D36A
D42A
D48A
D60A
TABLE 4A
AIR TEMPERATURE ENTERING OUTDOOR COIL, DEGREE °F
Return Air
Temperature Pressure
75° DB
62° WB
80° DB
67° WB
85° DB
72° WB
75° DB
62° WB
80° DB
67° WB
85° DB
72° WB
75° DB
62° WB
80° DB
67° WB
85° DB
72° WB
75° DB
62° WB
80° DB
67° WB
85° DB
72° WB
145
377
150
390
139
379
138
361
148
370
153
383
136
368
149
389
154
403
133
390
142
400
147
414
143
357
148
369
137
360
137
342
146
351
151
363
134
348
147
369
152
382
132
374
141
384
146
397
141
339
146
351
136
341
135
327
144
335
149
347
132
331
145
350
150
362
130
362
139
371
144
384
140
323
145
334
133
325
133
313
142
321
147
332
131
315
129
353
138
362
142
333
147
345
143
375
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
75 80 85 90
147
398
152
412
141
401
139
382
149
392
154
406
137
388
151
411
156
425
134
410
143
420
148
435
149
421
154
436
142
424
141
406
151
416
156
431
139
410
136
432
145
443
152
435
157
450
150
459
152
446
157
462
144
449
143
432
153
443
158
459
142
435
154
461
159
477
137
458
146
470
151
486
154
473
159
490
145
477
145
461
155
473
160
490
144
461
155
489
160
506
137
488
147
501
152
519
156
502
161
520
147
505
147
492
157
505
162
523
146
489
157
518
162
536
139
522
149
535
154
554
Capacitors
95 100 105 110 115 120
159
533
165
552
148
535
149
527
159
540
165
559
149
520
158
549
164
568
140
559
150
573
155
593
Part No.
8552-079
8552-005
8552-091
8552-079
8552-005
8552-091
8552-089
8552-005
8552-091
8552-058
8552-005
8552-091
Ratings
1 Ø, 240V
45+10/370
3 Ø, 240V
10/370
3 Ø, 460V
15/370
1 Ø, 240V
45+10/370
3 Ø, 240V
10/370
3 Ø, 460V
15/370
1 Ø, 240V
70+10/370
3 Ø, 240V
10/370
3 Ø, 460V
15/370
1 Ø, 240V
80+10/440
3 Ø, 240V
10/370
3 Ø, 460V
15/370
7961-791
Model
D3SA
D4SA
D5SA
TABLE 4B
AIR TEMPERATURE ENTERING OUTDOOR COIL, DEGREE °F
Return Air
Temperature Pressure
75° DB
62° WB
80° DB
67° WB
85° DB
72° WB
75° DB
62° WB
80° DB
67° WB
85° DB
72° WB
75° DB
62° WB
80° DB
67° WB
85° DB
72° WB
137
369
147
378
152
391
140
375
150
385
155
398
133
387
142
397
147
411
136
347
145
356
150
368
139
356
149
365
154
378
132
368
141
377
146
390
135
329
144
337
149
349
138
339
148
348
153
360
131
352
140
361
145
374
134
311
143
319
148
330
137
326
147
334
152
346
130
339
139
348
144
360
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
75 80 85 90 95 100 105 110 115 120
138
391
148
401
153
415
141
398
151
408
156
422
135
410
144
421
149
436
139
414
149
425
154
440
143
423
153
343
158
449
136
437
145
448
150
464
144
497
154
510
159
528
148
515
158
528
164
546
141
537
151
551
156
570
142
468
152
480
157
497
146
482
156
494
161
511
139
500
149
513
154
531
141
441
151
452
156
468
144
450
154
462
159
478
137
467
147
479
152
496
146
528
156
542
161
561
150
551
160
565
166
585
143
577
153
592
158
613
Capacitors
Part No.
8552-079
8552-005
8552-091
8552-094
8552-005
8552-091
8552-080
8552-005
8552-091
Ratings
1 Ø, 240V
45+10/370
3 Ø, 240V
10/370
3 Ø, 460V
15/370
1 Ø, 240V
30+10/370
3 Ø, 240V
10/370
3 Ø, 460V
15/370
1 Ø, 240V
40+10/370
3 Ø, 240V
10/370
3 Ø, 460V
15/370
7961-792
Manual 2100-612A
Page 29 of 31
TABLE 5A
Model
Rated Volts,
Hertz &
Phase
Minimum
Circuit
Ampacity
D3SA-A05 / D3SL2-A05
D3SA-A10 / D3SL2-A10 208/230-60-1
D3SA-B06 / D3SL2-B06
D3SA-B09 / D3SL2-B09 208/230-60-3
D3SA-C06 / D3SL2-C06
D3SA-C09 / D3SL2-C09
460-60-3
D4SA-A05 / D4SL2-A05
D4SA-A10 / D4SL2-A10 208/230-60-1
D4SA-B06 / D4SL2-B06
D4SA-B09 / D4SL2-B09 208/230-60-3
D4SA-C06 / D4SL2-C06
D4SA-C09 / D4SL2-C09
460-60-3
D5SA-A05 / D5SL2-A05
D5SA-A10 / D5SL2-A10 208/230-60-1
D5SA-B06 / D5SL2-B06
D5SA-B09 / D5SL2-B09 208/230-60-3
D5SA-C06 / D5SL2-C06
D5SA-C09 / D5SL2-C09
460-60-3
28.2
52
19.2
27.1
9
13.5
35.6
52
26
52
18
27.1
9
13.5
20.6
27.1
10
13.5
AC POWER CIRCUIT
Maximum
External
Fuse or Ckt.
Breaker
15
15
60
60
45
60
30
30
35
35
15
15
40
50
30
30
10
15
Field
Power
Wire
Size
14
14
6
6
8
6
10
10
8
8
14
14
8
8
10
10
14
14
DC POWER CIRCUIT
14
14
10
10
10
10
10
10
10
10
14
14
10
10
12
12
14
14
Ground
Wire
17.5
17.5
17.5
17.5
17.5
17.5
17.5
17.5
17.5
17.5
17.5
17.5
17.5
17.5
17.5
17.5
17.5
17.5
Minimum
Circuit
Ampacity
Maximum
External
Fuse or Ckt.
Breaker
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
Field
Power
Wire
Size
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
Ground
Wire
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
TABLE 5B
AC POWER CIRCUIT DC POWER CIRCUIT
Model
Rated Volts,
Hertz &
Phase
D36A-A05 / D36L2-A05
D36A-A10 / D36L2-A10 208/230-60-1
D36A-B06 / D36L2-B06
D36A-B09 / D36L2-B09 208/230-60-3
D36A-C06 / D36L2-C06
D36A-C09 / D36L2-C09
460-60-3
D42A-A05 / D42L2-A05
D42A-A10 / D42L2-A10 208/230-60-1
D42A-B06 / D42L2-B06
D42A-B09 / D42L2-B09 208/230-60-3
D42A-C06 / D42L2-C06
D42A-C09 / D42L2-C09
460-60-3
D48A-A05 / D48L2-A05
D48A-A10 / D48L2-A10 208/230-60-1
D48A-B06 / D48L2-B06
D48A-B09 / D48L2-B09 208/230-60-3
D48A-C06 / D48L2-C06
D48A-C09 / D48L2-C09
460-60-3
D60A-A05 / D60L2-A05
D60A-A10 / D60L2-A10 208/230-60-1
D60A-B06 / D60L2-B06
D60A-B09 / D60L2-B09 208/230-60-3
D60A-C06 / D60L2-C06
D60A-C09 / D60L2-C09
460-60-3
Minimum
Circuit
Ampacity
18.6
27.1
9
13.5
29
52
26
52
18
27.1
9
13.5
26
52
18.8
27.1
9
13.5
34.4
52
27.5
27.5
10.8
13.5
Maximum
External
Fuse or Ckt.
Breaker
30
30
15
15
50
50
45
60
25
30
10
15
40
60
60
60
35
35
30
30
15
15
15
15
Field
Power
Wire
Size
10
10
14
14
8
8
8
6
10
10
14
14
8
6
8
8
6
6
10
10
14
14
14
14
Ground
Wire
10
10
14
14
10
10
10
10
10
10
14
14
10
10
10
10
10
10
10
10
14
14
14
14
Minimum
Circuit
Ampacity
17.5
17.5
17.5
17.5
17.5
17.5
17.5
17.5
17.5
17.5
17.5
17.5
17.5
17.5
17.5
17.5
17.5
17.5
17.5
17.5
17.5
17.5
17.5
17.5
Maximum
External
Fuse or Ckt.
Breaker
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
Ground
Wire
These “Minimum Circuit Ampacity” values are to be used for sizing the field power conductors. Refer to the National Electric Code (latest version), Article
310 for power conductor sizing.
CAUTION: When more than one field 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.
Maximum Size of the time delay fuse or HVAC type circuit breaker for protection of field wiring conductors.
Based on 75°C copper wire. All wiring must conform to the National Electric Code and all local codes.
Manual 2100-612A
Page 30 of 31
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
Field
Power
Wire
Size
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
MODEL
D3SA/D3SL
D4SA/D4SL
D5SA/D5SL
RATED
ESP
0.15
0.15
0.20
MAX
ESP
0.50
0.50
0.50
TABLE 6
INDOOR BLOWER PERFORMANCE
ECONOMIZER
CFM ABOVE 40°
1800
1800
1800
ECONOMIZER
CFM BELOW 40°
800
1100
1100
RATED
PART LOAD
COOLING CFM
800
1100
1100 k
RATED
FULL LOAD
COOLING CFM
1100
1600
1600
ELECTRIC
HEAT
AIRFLOW
1800
1800
1800
D36A/D36L
D42A/D42L
D48A/D48L
D60A/D60L
0.15
0.20
0.20
0.20
0.50
0.50
0.50
0.50
1800
1800
1800
1800
1100
1250
1600
1600
1100
1250
1600
1600
1250
1400
1700
1700
1800
1800
1800
1800
Economizer Logic Control derives at this decision point, and switches the indoor motor speed. The damper actuator will then adjust to still yield a 55°F supply air temperature.
k On single-stage models, this only occurs if you have a thermostat/controller with "Y2" cooling stage connected.
Manual 2100-612A
Page 31 of 31

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