Compu-aire SYSTEM 2100 User manual

1
SYSTEM 2100
GLYCOL COOLED CAG-30 ENERGY MISER
-INSTALLATION AND OPERATION MANUAL-
8167 Byron Road Whittier, CA 90606
Phone: [phone] Fax: [phone]
www.compu-aire.com

2
TABLE OF CONTENTS
1SAFETY INFORMATION ................................................................................................ 5
2CONTACTING COMPU-AIRE FOR TECHNICAL ASSISTANCE........................................... 10
3PRODUCT MODEL INFORMATION .............................................................................. 11
4GENERAL EQUIPMENT DESCRIPTION ......................................................................... 12
5RECEIPT OF UNIT AND TRANSPORTATION.................................................................. 13
5.1 TRANSPORTATION MODE ..........................................................................................................................13
5.2 IMPORTANT –READ BEFORE INSTALLING .................................................................................................14
6LOCATING THE UNIT.................................................................................................. 14
6.1 Setting of the Unit ......................................................................................................................................15
6.1.1 Down Flow Units .................................................................................................................15
6.1.2 Upflow Units .......................................................................................................................15
6.2 Connections ...............................................................................................................................................16
6.2.1 Structural Support............................................................................................................... 16
6.2.2 Electrical Support ................................................................................................................16
6.2.3 Condensate Drain Connection ............................................................................................16
6.2.4 Water Connection............................................................................................................... 17
6.2.5 Electrical Connection ..........................................................................................................19
7REFRIGERANTS.......................................................................................................... 20
7.1 REFRIGERANT OIL CHARGE ........................................................................................................................20
7.1.1 Evacuation Procedures ....................................................................................................... 20
7.1.2 Liquid Charge ...................................................................................................................... 21
7.1.3 Vapor Charge ...................................................................................................................... 21
7.1.4 Leak Testing.........................................................................................................................22
7.2 HOW TO SAVE REFRIGERANT.....................................................................................................................22
8GENERAL WIRING DIAGRAM ..................................................................................... 23
9COMPONENTS OPERATION GUIDE AND MAINTENANCE............................................. 24
9.1 System Testing ...........................................................................................................................................24
9.1.1 Cooling ................................................................................................................................ 24
9.1.2 Heating................................................................................................................................ 24
9.1.3 Humidification.....................................................................................................................24

3
9.1.4 Dehumidification................................................................................................................. 25
9.1.5 Electric Panel....................................................................................................................... 25
9.2 Steam Humidifier .......................................................................................................................................25
9.3 Reheat ........................................................................................................................................................26
9.4 Condensate Pump (optional): ....................................................................................................................26
10 UNIT DIMENSIONS AND GENERAL COMPONENT LAYOUT........................................... 28
11 COMPONENTS IDENTIFICATION & ACCESS ................................................................. 29
11.1 FRONT LAYOUT (CONTROL BOX)................................................................................................................29
11.2 FRONT ACCESSS..........................................................................................................................................30
11.3 SIDE LAYOUT ..............................................................................................................................................30
11.4 STANDARD FLOOR STAND..........................................................................................................................31
12 SYSTEM CUT-OUT JUMPER FOR EMERGENCY SHUT-DOWN ........................................ 32
13 REMOTE ALARMS...................................................................................................... 32
14 PIPING CONNECTION LAYOUT ................................................................................... 33
14.1 WATER/GLYCOL LINE CONNECTION..........................................................................................................33
15 START-UP AND TEST PROCEDURE .............................................................................. 34
15.1 Check that ALL WIRING IS CORRECT ..........................................................................................................34
15.2 Check for Correct Phasing ..........................................................................................................................34
15.3 Fan Speed Adjustment ...............................................................................................................................34
15.4 No air flow & Clogged filter adjustment ....................................................................................................34
16 GENERAL MAINTENANCE........................................................................................... 35
17 REFERENCE DOCUMENTS .......................................................................................... 37
18 TROUBLESHOOTING GUIDE ....................................................................................... 39
PART LIST .................................................................................................................. 4518
FIGURES
Figure 1. Unit Model Designation ............................................................................................................... 11
Figure 2 Transportation .............................................................................................................................. 13
Figure 3 Floor Clearance Requirement .......................................................................................................14
Figure 4 Typical Unit Field Piping Connection.............................................................................................18
Figure 5 Steam Humidifier .......................................................................................................................... 25
Figure 6 Reheat Elements ...........................................................................................................................26
Figure 7 Condensate Pump Schematic ...................................................................................................... 27

4
Figure 8. Unit Dimensions-Standard Unit shown........................................................................................ 28
Figure 9 Sample Unit Shown*..................................................................................................................... 29
Figure 10. Condenser and Reheat elements access ................................................................................... 30
Figure 11. Unit Side Layout ......................................................................................................................... 30
Figure 12. Rear Open Floor Stand ............................................................................................................... 31
Figure 13 - Terminal Block with System Cut-Out ........................................................................................32
Figure 14. Piping Connection ...................................................................................................................... 33
Figure 15: Air Pressure Differential Switch .................................................................................................35

5
ADDENDUM
CORRECT PHASING OF SCROLL COMPRESSORS:
The scroll compressor is a unidirectional compressor and will only compress refrigerant in one
rotation direction. Therefore, the proper rotation of the scroll compressor must be checked. The
scroll compressor will run in the reverse direction but it will not pump refrigerant and will draw
substantially reduced current as compared to listed values, and will result in elevated sound levels.
Scroll compressor will trip on internal protection after running for some time in the reverse
direction.
Verification of the proper rotation of the scroll compressor is done by observing that suction
pressure drops and discharge pressure rises when the compressor is energized.
WARNING:
EXTENDED IMPROPER OPERATION MAY ALSO VOID COMPRESSOR WARRANTY.
1SAFETY INFORMATION
PLEASE CAREFULLY READ THE FOLLOWING SAFETY INFORMATION BEFORE PROCEEDING
FURTHER
This installation and operation manual (IOM) contains important safety information that should be
followed during installation or servicing of a System 2100 series. Below is general safety information
as well as descriptions of safety and accident prevention symbols that will be utilized throughout
this document. In addition to safety information provided by this manual, all warnings, cautions, and
safety instructions located on the unit should be adhered to at all times. If applicable, local codes or
ordinances and any other safety requirements must also be taken into consideration when installing
or servicing the unit.
This IOM should be stored in a safe and accessible location for service personnel during installation
or servicing operations. When no longer needed, this IOM should be returned to its original location
for future reference.
General guidelines:
a) Installation and maintenance are to be performed by qualified personnel only.
b) Assure all field wiring conforms to the requirements of the equipment and all applicable national
and local codes. Assure the voltage on the unit name-plate agrees with the power supply available.
c) Avoid contact with any sharp edges. It may cause serious injury.
d) Make sure all power sources are disconnected before any service work is performed on the
equipment

6
DESCRIPTION OF IMPORTANT ACCIDENT PREVENTION SAFETY SYMBOLS
SYMBOL
DEFINITION1
Indicates an extremely hazardous situation
which, if not avoided, will result in death or
serious injury. Use of this symbol is limited to the
most extreme situations
Indicates a potentially hazardous situation which,
if not avoided, could result in death or serious
injury.
Indicates a potentially hazardous situation which,
if not avoided, may result in minor or moderate
injury. Caution may be also be used to alert
against unsafe practices
Indicates a statement of company policy as the
message relates directly or indirectly to the safety
of personnel or protection of property
1Accident prevention definitions per ANSI Z535.2- 2011.
HIGH VOLTAGE!

7
Unit utilizes high voltage power supply. There is a high risk of arc flash and electric shock. Always
proceed with caution and wear protective equipment per NFPA 70E specifications at all times
before working on the electrical control panel. Failure to comply can cause serious injury or
death. The required unit power supply can be found on the nameplate located on the unit.
Service personnel should ensure that the main power supply to the unit is disconnected from the
feeder when installation or servicing operations are being performed and when power is not
needed.
System 2100 Series equipment requires a permanent power connection from an isolated circuit
breaker. The customer must provide earth ground to the unit per NEC, CEC, and local codes when
applicable.
INSTALLATION AND SERVICING PERSONNEL TRAINING & QUALIFICATIONS REQUIREMENTS
Installation and service of this equipment should be done only by qualified personnel who have
been specially trained and qualified in the installation or servicing of HVAC equipment. Improper
installation may result in unaccountable loss or damage.
EQUIPMENT TRANSPORTATION, PROPER BRACING, & HIGH-SPEED MOVING PARTS
Every precaution should be taken before the time of transportation of the equipment that all
transportation equipment such as forklifts is properly rated to transport the equipment. Not doing
so may cause equipment damage, injury, or death. Please refer to the shipping slip or contact the
factory to determine the weight of the unit.
Once installation of the equipment is complete, the equipment should also be properly braced or
anchored to the floor or wall if necessitated by local codes and ordinances. Upflow units are
especially at risk of falling over due to the fact that EC plug fans are installed at a higher distance
from the unit’s base, causing the center of gravity to be higher from the base compared to
downflow units.
High-speed moving parts can cause serious injury or death. Ensure that all unit panels are installed
before any functional testing is done.
SHARP EDGES, SPLINTERS, EXPOSED FASTENERS, AND HOT SURFACES

8
While every precaution has been made to ensure sharp edges, splinters, and exposed fasteners have
been minimized internally and externally on the unit to prevent personal injury, it is highly
recommended that all personnel installing or servicing the unit wear safety headgear, glasses,
gloves, and shoes at all times. In addition, precaution should be taken to ensure the unit is
sufficiently cool to perform any type of servicing operations.
A first aid kit should be readily available and accessible at all times when needed.
EQUIPMENT STORAGE POSITION AND LOCATION
Improper storage of unit may cause unintentional damage. If possible, keep unit in the upright
position and store unit indoors at all times before time of installation. In addition, steps should be
taken to ensure that the unit is protected from dampness, freezing temperatures, and contact
damage.
EQUIPMENT TRANSPORTATION
Prior to transporting unit to final installation location, ensure that there are no risks of overhead
interference. Relevant measurements of the unit and all doorways should be taken to determine if
unit will be able to be transported to its final location without causing damage to the building and to
the unit itself. Required unit clearances at installation site should also be confirmed prior to unit
transportation for safe and proper installation operations.
LOCATION OF DRAIN AND WATER SUPPLY LINES
Drains and water supply and return lines should not be located above any equipment that could
sustain water damage.
CLOGGED OR LEAKING DRAIN LINES
Any clogged or leaking drain lines must be inspected and maintained to ensure that drain water runs
freely through the drain system. Proper installation, application, and service practices should be
used at all times to minimize the possibility of water leakage from the unit. Water leakage can cause

9
severe property damage and loss of critical data center equipment. Suitable leak detection system
should be installed inside or around the proximity of the unit to minimize any type of property
damage.
REFRIGERANT LEAKAGE DUE TO FREEZING TEMPERATURES AND/OR CORROSION
Refrigerant leaking from the unit coil or piping due to freezing and/or corrosion can cause serious
equipment and building damage. Use of proper antifreeze and inhibitors can prevent freezing and
premature coil corrosion. To ensure proper unit normal operation, it is highly recommended that
the water or water/glycol solution used on the system be analyzed every six months to determine
the pattern of inhibitor depletion.

10
2CONTACTING COMPU-AIRE FOR TECHNICAL ASSISTANCE
Compu-Aire uses the latest in electronic and software technologies to develop some of the most
reliable and cost efficient air conditioning systems in the world. Since many of our customer
installations are sensitive to down time, we stock nearly all components for your system ready for
same day shipment. In addition, our service departments can usually diagnose and repair the
electronic components and return them to you within a few days.
Our customer support staff is available should you require assistance in diagnosing a problem or in
setting up your air conditioning system. During usual business hour, you may call at [phone]
between 8:00am and 04:30pm, Pacific Time, Monday through Friday except holidays, or you may
send a facsimile message at [phone] anytime. Finally, you may write us at Compu-Aire, 8167
Byron Road, Whittier, CA 90606.
Please do not return system components without prior authorization from Compu-Aire. Whether
repair or replacement is required for in warranty or out of warranty parts, Compu-Aire must know
what is being returned to keep proper records of returned parts. Call Compu-Aire’s service center
for a returned merchandise authorization number (RMA) and clearly mark all packages on the
outside with the number before sending
them to us.
When contacting the factory, please have information ready as to the model and size of the air
conditioner system and most important, the job number. Compu-Aire keeps a file on all equipment
sold detailing system components using this latter number. All such information can be found on
the Warranty Plate attached to each unit.

11
3PRODUCT MODEL INFORMATION
Figure 1. Unit Model Designation
SAFETY INSTRUCTIONS
This user’s manual contains important safety instructions that should be followed to properly
install and maintain Compu-Aire system 2100 series with glycol cooled unit. Read this
manual thoroughly before attempting to install or operate this unit. Store this manual at safe
place for future reference.
Adhere to all warnings, cautions and safety instructions on the unit and in this manual.
Follow all local codes and safety requirements to install and service this unit.
WARNING
Installation and service of this equipment should be done by qualified personnel who have
been specially trained and qualified in the installation of specific HVAC equipment. Improper installation
could result in unaccountable loss or damage. COMPU-AIRE System 2100 series equipment requires a
permanent power connection from an isolated circuit breaker. Customer must provide earth ground
to the unit per NEC, CEC and local codes as applicable.
Risk of high speed moving parts can cause injury or death.
Risk of heavy unit falling over
Risk of hot surfaces, sharp edges, splinters and exposed fasteners can cause injury

12
WARNING
High voltage danger!
Arc flash and electric shock hazard.
Disconnect main power supply from the feeder before working on this unit. Proceed with caution and
always wear protective equipment per NFPA 70E before working within electrical control
panel. Failure to comply can cause serious injury or death.
WARNING
Evaporator unit requires drain connections. Do not locate these connections above any equipment that
could sustain water damage.
NOTICE
Improper storage can cause unit damage. Keep the unit upright and store it indoor. Protect the
unit from dampness, freezing temperatures and contact damage.
Risk of overhead interference. The unit may be too tall to fit through a doorway. Measure the
unit and doorway heights and follow the installation plans to verify clearances prior to moving
the unit.
Risk of clogged or leaking drain lines. Drain line must be inspected and maintained to ensure
that drain water runs freely through the drain system. Improper installation, application and
service practices can result in water leakage from the unit. Water leakage can cause severe
property damage and loss of critical data center equipment. Suitable leak detection system shall
be installed for the unit and water supply lines to minimize the damage.
Risk of leaking unit coil/or piping due to freezing and/or corrosion can cause equipment and building
damage.
4GENERAL EQUIPMENT DESCRIPTION
The Compu-Aire System 2100 glycol cooled with energy miser series is a complete
environmental control system, factory wired, tested, and specifically designed to
provide temperature, humidity, and dust control for computer room installation.
System 2100 is designed to provide precise temperature control by utilizing advanced
digital and analog control via a programmable logic controller. Discharge air in the unit
is provided by utilizing variable frequency fan blowers also known as plug or EC fans.
The unit as shipped from the factory includes blower/motor package, electrical control
package, and other specified special options.

13
5RECEIPT OF UNIT AND TRANSPORTATION
Upon receipt of the unit, a visual inspection is required. The unit packaging should be entirely intact
and the crate should not be damaged. Transport the unit to the desired location in the upright
position to avoid damaging to any external panels or internal components. Once the unit is
uncrated and in the desired location, inspection of the unit for any external damage is crucial as this
may be indicative of internal damage. Any signs of damage to the packaging or system panels or
incomplete shipments require a claim to be filed with the shipping company. Freight damage claims
are the responsibility of the receiver.
Any items designated as field installed shall be packaged inside of the unit and must be removed
and installed prior to startup of the equipment.
Optional articles such as jack-stand parts, condensate pump, and remote control panel are packaged
separately.
REPORT ANY DAMAGE TO THE CARRIER. COMPU-AIRE IS NOT RESPONSIBLE FOR FILING OF ANY
CLAIMS. ALL NEEDED INSPECTION AND CLAIM FILING IS THE RESPONSIBILITY OF THE RECEIVER
Figure 2 Transportation
5.1 TRANSPORTATION MODE
Visual inspection of the outer casing provides a simple indication of possible internal damage to the
equipment. Move the unit to the installation site in the upright position.
FILE A CLAIM WITH THE SHIPPING COMPANY IF THE SHIPMENT IS DAMAGED OR INCOMPLETE.
FREIGHT DAMAGE CLAIMS ARE THE RESPONSIBILITY OF THE RECEIVER.
Optional articles such as jack stand parts, condensate pump, and remote control panel are packed
inside the unit.

14
5.2 IMPORTANT –READ BEFORE INSTALLING
Check the power supply. Voltage, frequency and phase must correspond to that specified on the
unit nameplate. The power supply must be able to handle the additional load imposed by this
equipment.
6LOCATING THE UNIT
Consult local building codes and National Code for special installation requirements. When
installing the unit, allow sufficient space for air flow clearance, wiring and servicing the unit. Left
side, right side and front should have a minimum clearance of 36 inches for servicing. Rear
clearance should be at least 1 inch to allow for out-of-square walls. The unit may be set directly on
top of the raised floor or on adjustable jackstands.
The unit should not be placed near any corner of the room. For best air distribution, the unit should
be place in mid-point against the unit should be place in mid-point against the longest wall, and as
close to the load(s) as possible. For multiple units, place them as far apart from each other as
possible for optimum air distribution. Before placing a unit directly on the raised floor, it is
important that the proper openings have already been cut.
The location of the unit shall be selected based on air distribution in the room and service access
requirement. Proper clearance is important for the unit function and access to various components
for service.
Front clearance: 38”
Left clearance: 38”
Right clearance: 38”
Rear clearence: 1”
Figure 3 Floor Clearance Requirement
36" MIN. CLEARANCE
38" MIN. CLEARANCE 38" MIN. CLEARANCE

15
Install unit on leveled solid floor that can support the unit weight and vibrations.
Securely mount the unit with floor and brace it with wall if needed.
Install the unit closer to the largest heat load.
Air distribution is very important for proper unit operation. Air balancing is required to obtain design
CFM at site. Fan speed can be adjusted from the controller as needed. Several feet of clearance
must be maintained between the supply air and return air intake of the unit. In existing room, the
unit supply air shall be directed towards the air intake side of the heat load. Always locate air intake
of the servers and any other heat load in the cold aisle for efficient air distribution. The unit supply
air shall never be directed towards the exhaust fan of any heat load in the room.
6.1 Setting of the Unit
Locate the unit so the desired clearances are provided, paying special attention to floor height for
downflow units. Make sure that piping under floor does not interfere with the discharge air of the
unit. Unit can sit on an elevated flooring while remains fully accessible. Floor stand or other support
maybe used to further support the unit.
After moving the unit to the desired location, the system needs to be leveled and anchored to the
floor as directed by the building design engineer, typically using wedge anchors. Prior to anchoring
the unit to the floor, verify locations for Chilled Water Supply and Chilled Water Return line
connections, drain line connection as well as the electrical power input locations are matching with
unit location requirement. Proper electrical supply power is an absolute necessity as the unit is
designed specifically for the requirements on the nameplate. All knock-out shall be provided by
others in the field.
The unit is designed with draw-thru air pattern with negative pressure inside. The condensate drain
connection with a proper p-trap is factory installed to prevent the water is drawn back by the fans.
6.1.1 Down Flow Units
Down flow units are required to be installed on floor stands. Verify that the raised floor has been
properly sized for the design air flow. The raised floor shall be free of air flow restrictions. The height
of the adjustable floor stand can be raised or lowered through the use of the adjusting rods. The
supply air shall be directed into the cold aisles and avoid any short cycling of cold air back to the unit
return air. Floor stand height for down flow models shall be selected based on unit CFM, fan size
and static pressure requirement. The floor stand must be securely mounted and all locknuts must be
tightened to assure rigidity. See provided floor stand drawing for installation detail.
6.1.2 Upflow Units
The unit may be placed directly on the sub floor. The up flow unit may have duct connection or an
optional discharge air plenum. Typical up flow unit has front return configuration but optional rear
return with filter box is available.
The most desirable location to maintain appearance is against a wall. All incoming pipes and wires
can be fed to the unit directly through the wall. If the room is equipped with the raised floor, the
unit can be located anywhere

16
6.2 Connections
In connecting the unit, several items must be addressed. They are:
6.2.1 Structural Support
The unit can be installed directly on the floor of on the raised floor without the need for any special
support. The floor should be level. Gasket material should be placed between the bottom perimeter
of the unit and the floor on the downflow unit to act as vibration isolator. The gasket should be
foam, ½” x 3/8”. No gasket is needed on the upflow unit.
6.2.2 Electrical Support
A fused disconnect or a HVAC approved circuit breaker must be field provided and install per the
National Electric Code (NEC). There is access to the unit for electrical connection through the unit
bottom or the top panel on the unit. Be sure unit is properly grounded.
A fused disconnect must also be provided for the air cooled condenser/condensing unit for air
cooled units and dry fluid cooler of the glycol cooled units..
6.2.3 Condensate Drain Connection
This must be equipped with 3/4” O.D. drain line. The contractor must provide and install a P-trap in
this line at the lowest point in the unit or below the unit. A minimum slope of 1/4” per foot must be
provided on the horizontal run. Condensate water will not drain thus possibly causing water
carry over into the air space. The p-trap must be calculated as per Figure 7 below. After
installation of the p-trap, verify trap operation by running the system blowers at full
speed and adding water to the drain pan, water should drain out of the condensate pan
and through the trap with supply fan running at full speed.

17
6.2.4 Water Connection
Follow local and building codes for field piping installation. A close circuit dry fluid cooler is to be
used. A pump package for field install by other is generally included in the system with separate
cabinet unit. Provide a shut off valve in supply and return line for isolation. Refer to general unit
dimension for location of piping connection access.

18
Figure 4 Typical Unit Field Piping Connection

19
Note: Glycol and water cooled units are designed for maximum of 150 psig water pressure. Higher
pressure units are available; refer to unit nameplate.
6.2.5 Electrical Connection
The unit is completely factory wired with self-contained controls.
IMPORTANT - Before proceeding with the electrical connections, make certain that the volts, hertz
and phase correspond to that specified on the unit rating plate. Also, check to be sure that service
provided by the utility is sufficient to handle the additional load imposed by this equipment. Refer to
the unit rating plate for equipment electrical requirements. The attached wiring diagram shows the
proper high and low voltage field wiring.
Make all electrical connections in accordance with National Electrical Code and any local code
ordinances that may apply. USE COPPER CONDUCTORS ONLY.
WARNING -- The unit cabinet must have an uninterrupted or unbroken electrical ground to minimize
personal injury if an electrical fault should occur. It is important that an electrical ground wire of
adequate size can be connected to the ground lug provided inside the control box.
Supply voltage at the unit must be within + 10% of the voltage indicated on the nameplate for a dual voltage
rating, supply voltage must be within 5% from the lower nameplate rating and within 10% from the higher
rating. Phase to phase imbalance must not exceed 3%. Contact your local utility company for correction of
improper line voltage. Improper electrical power supply may cause premature failures and void unit
warranties
The system cutout terminals on the terminal strip are for connection to a "panic button" or remote
shut-off if required. This should only be connected to a switch and NO EXTERNAL SOURCE OF
POWER SHOULD BE INTRODUCED AT THIS POINT. The conductors should be sized depending on the
length of run and the number of control transformers used in the unit. Maximum voltage drop must
not exceed 1 volt. Each control transformer draws approximately 3 amps @ 24 V. For long runs
where the conductor size becomes too large, an interlocking relay (field provided) should be used.
A dry contact (24 volts rating) is provided for terminals for a remote alarm connection.
If the control panel includes a condensate probe, make sure it is mounted below the unit against the floor
area where water may collect. To check the operation of the probe, submerse it in a cup of water. The
condensate alarm should energize.

20
7REFRIGERANTS
7.1 REFRIGERANT OIL CHARGE
DO NOT MIX DIFFERENT TYPE OF REFRIGERANT ON THE SAME SYSTEM.
For adding refrigerant oil please follows compressor manufacturer for the proper type of refrigerant
oil used for the system. DO NOT MIX DIFERRENT TYPE REFRIGERANT OIL IN THE SAME SYSTEM OR
COMPONENT FAILURE AND SYSTEM MALFUNCTION MAY OCCUR.
The system 2100 unit is shipped with factory pre-charged refrigerant or nitrogen. System must be
charged enough with correct type of refrigerant and refrigerant oil. Generally, the oil charge should
be 2 to 3% of the liquid line charge. USE ONLY POLYOL ESTER (POE-32) OIL FOR ALL THE
COMPRESSORS. See the compressor name plate for original oil charge. Manufacturer recommends
compressor should be charged 4 fluid ounces (118 ml) less than the name plate value for a full
complete recharge on the compressor.
It is recommended if the system contains more than 20 lbs (9 kg) of refrigerant; add one fluid ounce
for every additional 5 pounds (15ml/kg) of refrigerant over this amount.
7.1.1 Evacuation Procedures
CAUTION: PULL ALL FUSES EXCEPT MAIN FAN AND TRANSFORMER FUSES. To reduce the possibility
of non-condensable in the refrigerant system during charging, the solenoid valves must be open and
a vacuum must be pulled on both the suction side and the discharge side of the compressor.
PROCEDURE FOR DEHYDRATION - METHOD #1
1) Open all disconnects switches.
2) Pull all fuses except main fan and transformer fuses.
3) Turn disconnect ON
4) Start the main fan by pushing the main fan switch.
5) Check amperage on main fan and make sure it does not exceed FLA (full load amps).
6) Check fan rotation and correct if necessary.
7) Set thermostat at 40oF.
8) Proceed with paragraph #4 in procedure #2.
PROCEDURE FOR DEHYDRATION - METHOD #2
By using a separate control voltage transformer having an output of 24 volts at 40 VA, the
solenoid can be energized without starting the unit.
1) Turn all power OFF to the unit.