DATA AIRE SERIES
Operation and Maintenance Manual
DX 6-30 ton
Air and Water/Glycol Cooled
CONGRATULATIONS ON THE SELECTION OF A DATA AIRE PRECISION
ENVIRONMENTAL CONTROL SYSTEM. PROPER INSTALLATION, OPERATION
AND MAINTENANCE OF THIS EQUIPMENT WILL ENSURE YEARS OF OPTIMAL
PERFORMANCE.
This manual is intended to assist trained service personnel by providing
necessary guidelines for this particular equipment. Service to Data Aire units
should be done by qualified individuals with an adequate background in areas
such as HVAC, electrical, plumbing and electronics, as applicable.
Service performed by unauthorized or unqualified technicians may void
manufacturers’ warranties and could result in property damage and/or personal
injury.
Special care should be given to those area where these symbols appear.
Data Aire, Inc. reserves the right to make design changes for the purposes
of product improvement, or to withdraw any design without notice.
2
Table of Contents
1.0
1.1
1.2
1.3
1.4
1.4.1
1.4.2
1.5
1.6
INSTALLATION .................................................................................................. 6
Room Considerations ............................................................................................ 6
Inspection .............................................................................................................. 6
Rigging .................................................................................................................. 6
Locating the Unit ................................................................................................... 7
Downflow Units...................................................................................................... 7
Upflow Units .......................................................................................................... 8
Paperwork ............................................................................................................. 8
Storage .................................................................................................................. 8
2.0
2.1
2.1.1
2.1.2
2.1.3
2.1.4
2.1.5
2.1.6
2.2
2.2.1
2.2.2
2.2.3
2.3
2.4
2.5
2.5.1
2.5.2
2.6
2.7
PIPING ................................................................................................................ 9
Air Cooled Unit Piping ........................................................................................... 9
Discharge Lines..................................................................................................... 9
Liquid Lines ........................................................................................................... 9
Suction Lines ....................................................................................................... 10
Connection Sizes, Air Cooled Units..................................................................... 10
Field Piping, Remote Condenser ........................................................................ 10
Field Piping, Remote Condensing Unit ................................................................11
Water/Glycol Cooled Unit Piping ..........................................................................11
Field Piping, Glycol System................................................................................. 12
Connection Sizes, Water/Glycol Cooled Units .................................................... 12
Connection Sizes, Fluid Coolers ......................................................................... 12
Auxiliary Chilled Water Coil Piping ...................................................................... 13
Condensate Drain Piping .................................................................................... 13
Humidifier Piping ................................................................................................. 13
Steam Generator Humidifier................................................................................ 13
Dry Steam Humidifier .......................................................................................... 13
Leak Testing ........................................................................................................ 14
Evacuation........................................................................................................... 14
3.0
ELECTRICAL CONNECTIONS ........................................................................ 15
Electrical Service.. ............................................................................................... 15
Nameplate Ratings .............................................................................................. 15
Grounding............................................................................................................ 15
Voltage Tolerance ................................................................................................ 15
Auxiliary Control Wiring ....................................................................................... 15
Remote Shutdown ............................................................................................... 15
Remote Alarm Contacts ...................................................................................... 16
Remote Sensors.................................................................................................. 16
Condensate Pumps ............................................................................................. 16
Condensate Probe .............................................................................................. 17
Water Sensing Cable .......................................................................................... 17
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
3.10
3.11
3
Table of Contents, cont’d
4
4.0
4.1
4.2
4.3
4.4
4.5
4.5.1
4.5.2
4.6
4.6.1
4.6.2
INSTALLATION OF REMOTE HEAT EXCHANGER ......................................... 18
Rigging ................................................................................................................ 18
Leg Assembly ...................................................................................................... 18
Locating the Remote Heat Exchanger ................................................................ 18
Electrical Service ................................................................................................. 19
Air Cooled Condensers - Model DARC ............................................................... 19
Fan Speed Control .............................................................................................. 19
Ambient Thermostats .......................................................................................... 19
Fluid Coolers - Model DAFC ............................................................................... 20
Fluid-Sensing Thermostats ................................................................................. 20
Energy Saver Cooling ......................................................................................... 20
5.0
5.1
5.1.1
5.1.2
5.2
5.2.1
5.2.2
5.2.3
5.3
5.3.1
5.3.2
5.4
5.4.1
5.5
CHARGING ........................................................................................................ 21
Voltage Phase Check .......................................................................................... 21
Evaporator ........................................................................................................... 21
Secondary Heat Exchanger ................................................................................ 21
Important Refrigeration Components .................................................................. 21
Expansion Valve .................................................................................................. 21
High Pressure Cutout Switch .............................................................................. 21
Low Pressure Cutout Switch ............................................................................... 22
Air Cooled Systems ............................................................................................. 22
Fan Speed Control System Charging.................................................................. 22
Flooded System Charging ................................................................................... 23
Water/Glycol Cooled Systems ............................................................................. 24
Water/Glycol Cooled Systems Charging ............................................................. 24
Refrigerant Handling ........................................................................................... 24
6.0
6.1
6.2
6.3
6.4
6.5
6.6
GLYCOL SYSTEMS ........................................................................................... 25
Glycol Concentration ........................................................................................... 25
Internal (Fluid) Volume - Downflow Models ......................................................... 25
Internal (Fluid) Volume - Upflow Models ............................................................. 25
Fluid Cooler Internal Volume ............................................................................... 26
Copper Piping Internal Volume............................................................................ 26
Freezing Point of Aqueous Solutions .................................................................. 26
7.0
7.1
7.2
7.3
CONTROLS ....................................................................................................... 27
DAP® III Microprocessor Control Panel ............................................................... 27
Secondary Heat Exchangers............................................................................... 27
Wiring Diagrams .................................................................................................. 27
Table of Contents, cont’d
8.0
8.1
8.2
8.3
8.4
8.5
8.6
8.7
REGULAR MAINTENANCE ITEMS .................................................................. 28
Filters................................................................................................................... 28
Belts .................................................................................................................... 28
Bearings .............................................................................................................. 28
Humidifier Canisters ............................................................................................ 28
Fuses................................................................................................................... 29
Heating Elements ................................................................................................ 29
Refrigerant Filter Drier ......................................................................................... 29
9.0
WARRANTY ....................................................................................................... 30
10.0
CONTACT DATA AIRE ...................................................................................... 31
LINE SIZING CHART .......................................................................................................... 32
MONTHLY MAINTENANCE INSPECTION CHECKLIST .................................................... 33
QUARTERLY MAINTENANCE INSPECTION CHECKLIST................................................ 34
SUPERHEAT and SUCTION PRESSURE TROUBLE SHOOTING GUIDE ....................... 35
TEMPERATURE PRESSURE CHART................................................................................ 36
CORRECTION FACTOR FOR SUPERHEAT MEASUREMENT......................................... 37
INDEX............................................................................................................................ 38, 39
5
1.0 INSTALLATION
There is no intent on the part of Data Aire, Inc. to define local codes or statutes which may
supersede common trade practices. The manufacturer assumes no responsibility for their
interpretation. Consult local building codes and the National Electrical Code for special
installation requirements.
1.1
Room Considerations
Precision air conditioning equipment is designed to control spaces within close tolerances of
temperature and humidity. However, the room must be built with a proper vapor barrier. A film of
polyethylene is often used on walls and ceilings. Walls and floors must also be painted with a vaporseal paint. Failure to provide a vapor barrier can compromise space conditions.
Introduction of outside air into the space should be minimized. Outside air in excess of 5% of the
total circulated air volume can have a significant effect on the overall space conditions and result in
poor space control.
1.2
Inspection
This Data Aire unit has been factory run-tested and has gone through a comprehensive inspection
prior to its packaging and shipment to ensure that it arrives in excellent condition. However, shipping
damage can occur and a visual inspection of the outer crating immediately upon delivery should be
performed.
Note any external damage or other transportation damage on the freight carrier’s forms. Inspect
the unit itself for internal damage. A claim should be filed with the shipping company if the equipment
is damaged or incomplete.
Loose items such as remote control panels, disconnect switch handles, spare belts and spare filters
are packed inside the unit. Refer to the yellow shipping tag located on the unit door for details.
Freight damage claims are the responsibility of the purchaser. Action to recover losses
should be filed immediately. Please notify factory personnel of any claims.
1.3
Rigging
Move the unit in its upright position to the installation site. It is recommended that the unit be
protected from damage to the decorative doors during any storage or moving. Removal of the
decorative doors is easily accomplished and may be done when moving equipment.
The shipping skid should be left in place if the unit is being moved with a forklift. If the unit is
being lifted, use spreader bars to prevent damage to the doors and panels.
The unit has 3/4” holes in the shipping skid to which casters with 3/4” stems can be attached. This
allows easy movement down halls, into elevators and through doorways. If clearance is a problem
6
the casters may be inserted directly into the bottom of the 1” tubular steel corner posts at the bottom
of the unit.
Warning: Improper lifting or moving of equipment may result in damage to decorative
doors, panels or frame members.
1.4
Locating the Unit
When installing the unit, sufficient space must be allowed for airflow clearance, wiring, plumbing,
and service access. It is recommended that each side and front have a clearance of at least 30” to
allow the doors to swing open and for servicing the unit.
The doors on some sides may not require as much service clearance. Refer to the particular
unit component breakdown drawings for assistance. Rear clearance is not required, but 1” to 2” of
clearance is suggested.
For the best air distribution, the unit should be centered against the longest wall, as close to the
heat load as possible, unless the unit is ducted. The unit should not be placed near any corner of
the room or at the end of a long, narrow room. Multiple units should be evenly spaced, as far apart
as possible.
Note to Installing Contractor: Condensation formation and frequent humidifier flushing are
normal functions of this equipment. Proper drain connections must be made to ensure
proper removal. Unit will require water connections for condensate removal and possibly
for humidifier makeup water, condenser water, chilled water and/or hot water. Installation
of units above equipment that could sustain water damage should be avoided.
1.4.1 Downflow Units
Downflow units will typically sit on an elevated flooring system known as a raised floor. The unit
discharges air downward which pressurizes the raised floor and channels upward through perforated
floor tiles. Location and quantity of perforated tiles will dictate proper air distribution. If the raised
floor is strong enough to support the unit and local codes permit, the unit can be placed directly on
top with cutouts made for the discharge openings.
There may be additional support required in the form of adjustable jackstands. These are
adjustable, threaded leveling rods which support the unit in each of the corners and in the center on
longer length units. Tighten the locknuts provided with each jackstand. The baseplate can rest on
the floor or on vibration isolation pads.
Floorstands are also a way of supporting the unit. These are ordered to the height of the floor
with leveling rods to allow adjustment. The floorstand has lips in each corner to align with the unit
which is placed on top. It is recommended that the unit frame be bolted or screwed to the floorstand
from below. Local building codes may dictate this procedure. After installation, the raised floor is
typically built around the unit.
The raised floor serves as the distribution plenum for air on downflow units. Cables,
piping, wiring raceways, inadequate floor height and any other restrictions can inhibit
proper airflow. Care should be taken to avoid restrictions.
7
1.4.2 Upflow Units
Upflow units will typically be supported by vibration isolation pads and/or floorstands which may
also include leveling screws. An air discharge plenum may be factory provided which ships loose
and must be attached at the top of the unit frame.
Alternately, an air distribution plenum must be field fabricated with supply grilles to distribute the
air. Units are shipped with a drive package to overcome external static pressure. Adjustments to
the blower speed may be required to adjust to actual conditions.
1.5
Paperwork
Each Data Aire unit ships with a start-up sheet that should be completed during installation. Also
included in the paperwork is a warranty/information packet that provides important wiring diagrams,
specific component literature, warranty registration cards and other valuable paperwork, including a
copy of this Installation/Operation and Maintenance manual.
A yellow tag is attached to the outside decorative door to indicate articles that may have been
packaged and shipped loose within the unit cabinet. Typically this would be jackstands, condensate
pumps and other loose components that are not factory mounted.
1.6
Storage
Your Data Aire equipment comes ready for immediate installation. In some instances it may be
necessary to store the equipment for a period of time. If you must store the equipment it should
be done in a dry area, out of the weather, protected from damage by other equipment in storage or
transportation equipment, never stacked, and avoid frequent relocation.
If equipment is stored for longer than 30 days special precautions must be taken to avoid coil
damage. All coils should be charged and sealed with a low pressure (1-3 psig) inert gas, such
as nitrogen. This prevents contaminates from entering the coils; then when the seal is broken at
installation, the rush of escaping gas verifies the coil is still leak free. If coils are not charged and
sealed condensation mixes with air pollutants forming a weak acid and over time can cause pin hole
leaks to develop in the coil tubes.
When equipment is installed after storage caution should be taken to inspect and replace, if
required, rubber hoses and belts. All moving parts, such as blowers and motors, should be hand
tested to ensure that they are free and clear prior to start-up. Finally, verify that all lubrication is fresh
and full.
It is the responsibility of the installing contractor to return the start-up sheet and warranty
registration card to Data Aire for proper activation of the unit warranty. Failure to do so
may cause delays and in some cases void the warranty.
8
2.0 PIPING
2.1
Air Cooled Unit Piping
Refer to the attached line sizing chart on page 32 for a guideline for sizing refrigerant lines. The
ultimate responsibility for line size selection is that of the installing contractor or project engineer.
Data Aire does not assume this responsibility. The chart covers distances up to 200 equivalent feet.
For installations beyond this distance, consult ASHRAE or similar references.
Standard piping practice must be used to ensure proper oil return and efficient operation.
The interconnecting lines to the remote air cooled condenser must be installed by a qualified
refrigeration mechanic.
2.1.1 Discharge lines
Discharge lines, also called hot gas lines, should be trapped at the top (inverted) and bottom
as well as every 15 to 20 feet of vertical rise. Discharge line check valves are recommended on all
installations, especially those where there are long pipe runs or cold climates. Check valves should
be installed no less than six to ten feet from the compressor. The discharge, suction and liquid lines
need to be refrigerant grade copper and in accordance with local code. All refrigeration piping should
be installed with high temperature brazed joints. When brazing, a supply of nitrogen gas needs to
be fed through the refrigerant lines. Be sure to open the other end of the refrigerant line to allow the
nitrogen to bleed off and not pressurize the piping. Prevailing good refrigeration practices should be
employed for piping support, leak testing, dehydration and charging the refrigerant circuits. During
the installation the lines should be capped off and filled with dry nitrogen at the end of each day’s
work or until the system is completed and sealed.
Data Aire recommends a silver/phosphorus/copper alloy with 5 to 15% silver be used to braze
the refrigerant line sets to the indoor and outdoor units. Nitrogen needs to be flowing through the
lines to eliminate carbon deposit buildup on the inside of the joints. Carbon could contaminate the
refrigerant and restrict the metering device.
Piping must be supported within 18” of the inlet and outlet connections. The inlet connection is
located on the top header of all units. The discharge outlet is located at the bottom of the header.
Discharge line pressure should not exceed 6 PSI for R-407C and 9 PSI for R-410A. Recommended
gas velocity for proper oil return is 1,000 FPM. Slope horizontal lines downward in the direction of
refrigerant flow (1/2” for every ten feet of line length). Discharge lines do not require insulation but
due to the high temperatures of the refrigerant inside the line, the pipes may be insulated to protect
against burns to individuals near or around the lines.
2.1.2 Liquid lines
Liquid line size is determined by pressure drop and velocity. The liquid line pressure drop for
R-407C should not exceed 5 PSI or 9 PSI for R-410A. The recommended velocity should be between
200 and 300 FPM. To avoid excessive liquid line pressure drop, the air cooled condenser should
be located above or at the same level as the evaporator. Condenser installation more than ten feet
below the evaporator is not recommended. Insulation of liquid lines is not required but can be useful
in preventing condensation from forming and to avoid flashing on long pipe runs.
9
2.1.3 Suction lines
Some applications call for the compressor(s) to be mounted as part of condenser (more
commonly referred to as a condensing unit). Condensing units require field piping of liquid and
suction lines. Suction lines are trapped similarly to discharge lines. Common practice for suction
line selection and installation should be followed. Suction line should always be insulated.
2.1.4 Connection Sizes, Air Cooled Units
Model
Hot Gas Liquid
DAA* 06
1/2”
1/2”
DAA* 08
1/2”
1/2”
DAA* 10
1/2”
1/2”
DAA* 13
1/2”
1/2”
Model Hot Gas
DAA* 16
3/4”
DAA* 20
3/4”
DAA* 26
3/4”
DAA* 30
7/8”
Liquid
5/8”
5/8”
5/8”
5/8”
* D - downflow, U - upflow
Field connections at the indoor evaporator and remote condenser or condensing unit
will not necessarily be the same as the field pipe size required. In some cases these will
vary significantly.
2.1.5
Field Piping, Remote Condenser
One Circuit Shown
10
2.1.6 Field Piping, Remote Condensing Unit
One Circuit Shown
2.2
Water/Glycol Cooled Unit Piping
The required filed installed fluid cooler pipe sizes may or may not be the same as the
connection sizes at the fluid cooler. (Refer to 2.2.2 and 2.2.3 for connection sizing). This will
depend on the length of pipe and the calculated pressure drop of peripheral components.
Water cooled units may also be connected to building water or tower water sources. Pipe
size will depend on length of run and the maximum water flow required.
Shut-off valves (field provided) should be installed within a few feet of the inlet and outlet
connections of the evaporator to allow the unit to be isolated for service. Drain/fill valves should be
located at the lowest point on the connected piping.
All water/glycol cooled units are shipped with plate/fin heat exchangers as standard equipment.
A strainer is shipped loose and is to be field installed in the supply line with shut-off valves (field
provided) before and after the strainer. The strainers and water/glycol piping must be cleaned on a
periodic basis. If the unit is shipped with shell and tube condensers, strainers are not required nor
shipped with unit.
One of the most common problems is a water/glycol system is the presence of air in the
condenser water loop. Air vents must be installed in various locations in the piing system
to purge the air.
Glycol system piping may include a centrifugal pump (or pumps for redundancy). Pumps must be
primed before operating per the pump manufacturers guidelines.
11
2.2.1 Field Piping, Glycol System
(Field Provided)
2.2.2 Connection Sizes, Water/Glycol Cooled Units
Evaporator
Model
DAW/G 06
DAW/G 08
DAW/G 10
DAW/G 13
Water IN and OUT
Connections, OD
1-5/8”
1-5/8”
1-5/8”
1-5/8”
Evaporator
Model
DAW/G 16
DAW/G 20
DAW/G 26
DAW/G 30
Water IN and OUT
Connections, OD
2-1/8”
2-1/8”
2-1/8”
2-1/8”
Fluid Cooler
Model
DAFC 37
DAFC 40
DAFC 44
DAFC 50
DAFC 57
DAFC 61
DAFC 75
DAFC 80
DAFC 88
DAFC 100
Water IN and OUT
Connections, OD
2-5/8”
2-5/8”
2-1/8”
2-5/8”
2-5/8”
2-5/8”
2-5/8”
2-5/8”
2-5/8”
2-5/8”
2.2.3 Connection Sizes, Fluid Coolers
Fluid Cooler
Model
DAFC 06
DAFC 07
DAFC 09
DAFC 11
DAFC 15
DAFC 17
DAFC 21
DAFC 24
DAFC 28
DAFC 30
Water IN and OUT
Connections, OD
1-5/8”
1-5/8”
1-5/8”
2-1/8”
2-1/8”
2-5/8”
2-1/8”
2-5/8”
2-5/8”
2-1/8”
Models DAFC 57 and larger are double-wide units. Although the header connection for
each section is 2-5/8”, each unit comes with a factory provided manifold kit with 3-1/8”
field connections.
12
2.3
Auxiliary Chilled Water Coil Piping
Units with an Auxiliary Chilled Water cooling coil require a separate source of chilled water. These
chilled water connection sizes will be equal to the condenser water connection sizes on the chart in
Section 2.2.2. Units with an Energy Saver cooling coil have shared piping with the condenser supply
and therefore do not require a separate water source.
All chilled water pipes have a cap installed on the end of the pipe for pressure testing the system.
These caps need to be removed before installing the water piping to the unit. Use a tube cutter for
smaller pipes and reciprocating saw with a metal cutting blade for larger pipes or if there is a clearance
problem. All connections need to be cleaned before connections are brazed together.
2.4
Condensate Drain Piping
Every indoor unit has a 3/4” copper stub provided for condensate removal. A union is recommended
at the field connection which will permit easy disconnection from the unit for cleaning.
A trap should be built into the drain line to prevent air from backing up into the unit. Drain lines
should be pitched downward not less than 1/4” for each ten feet of horizontal run. Do not reduce
the size of the drain line. Where local code permits, PVC pip may be used.
Some applications have no convenient means of allowing a gravity drain. In this case, a
condensate pump can be used. These come either factory mounted or shipped loose. Factory
mounted condensate pumps do not require a separate power source.
Condensate pumps shipped loose (or field provided) typically require a dedicated 110 volt power
source. Field pipe connections must be made to the pump discharge connection. A check valve
must be installed to prevent short cycling. See also condensate pump electrical requirements in
Section 3.9.
2.5
Humidifier Piping
2.5.1 Steam Generator Humidifier
The standard humidifier on Data Aire systems is a steam generator type with a disposable cylinder.
The humidifier makeup water should be brought to the humidifier through the field connection opening
using 1/4” copper tubing. A compression fitting is provided at the humidifier.
A shutoff valve should be provided outside the air conditioner to allow disconnection for service.
An in-line water pressure regulator and strainer should be installed. Water pressure should be set
between 30 and 80 PSI.
The humidifier has a drain at the bottom which is factory piped to the main condensate drain line.
The dispersion tube also has a drain line. No additional field piping is required.
2.5.2 Dry Steam Humidifier
The optional dry steam type humidifier requires a strainer on the inlet steam line. An outlet
connection with a field-provided steam trap is also required. Steam pressure is typically 10-15 psi.
13
2.6
Leak Testing
No installation is complete until the entire system has been thoroughly checked for leaks.
This includes checking refrigerant tubing, flare fittings, pressure controls, Shrader fittings
and compressor rota-lock service valves.
In addition to the refrigeration system, check all condenser water lines, humidifier makeup lines,
condensate lines, condensate pumps, chilled water lines, centrifugal pumps, and fluid coolers as
applicable.
With recent changes in the handling and recovery of refrigerant, it is not permissible to release
refrigerant into the atmosphere. Many leak-test methods recommended in the past are no longer
possible. Current standard practices must be used.
Pressurize system circuit to 150 PSIG (1034kPa) by using dry nitrogen with a trace of refrigerant.
Check the entire system for leaks with suitable leak finder, (per local code) including but not limited
to all braze joints, caps, fittings and flare nuts on both field and factory furnished components. After
completion of leak testing, release test pressure and pull a vacuum on the system.
Tightening of fittings and valves is the responsibility of the installing contractor.
2.7
Evacuation
Evacuate the refrigerant lines, condenser coil and evaporator coil to 250 microns or lower (a
micron gauge and 2-stage vacuum pump are required). Valve off and turn off the vacuum pump
and wait for at least 15 minutes to make sure the micron gauge reading does not go back above 700
microns. If it does, restart the vacuum pump and evacuate until the system reaches 250 microns.
If the system still does not hold the pressure below 700 microns the system needs to be rechecked
for leaks.
After the system has been satisfactorily evacuated the lines can be charged with refrigerant.
Connect the pressure gauge manifold set to the high and low ports near the compressor. Connect
the charging line to the refrigerant tank and set it for liquid feed. Open the refrigerant tank valve
and purge the line at the manifold, then open the high side valve on the manifold only and allow the
refrigerant flow until the system pressure equalizes. At this point the system will have 75 to 80% of
the total refrigerant charge. Start the blower(s) and then the compressors checking the operating
pressures and temperatures.
NOT APPLY POWER TO THE COMPRESSOR WHEN IN A VACUUM
14
3.0 ELECTRICAL CONNECTIONS
Before proceeding with the electrical connections, make certain that the volts, hertz,
and phase correspond to that specified on the unit electrical nameplate. Use copper
conductors only.
3.1
Electrical Service
Check to be sure the service provided by the utility is sufficient to handle the additional load
imposed by this equipment. Most units with secondary heat exchangers will require a separate
power source and field-provided, interconnecting control wires. See section 3.5 below.
Remote condensers will typically require one power source. Glycol systems with fluid coolers and
loose pump(s) typically require one power source for the fluid cooler and will require one additional
source for a single pump or two additional sources for dual pumps. Systems where the pump(s) are
mounted and piped integral to the fluid cooler will usually require a single power source.
3.2
Nameplate Ratings
Refer to the unit electrical nameplate for equipment electrical requirements. Minimum Circuit
Ampacity (MCA) also known as wire sizing amps, will dictate the minimum required wire gauge.
Maximum Overcurrent Protection (MOP) device amps will dictate the maximum circuit breaker or
fuse size.
3.3
Grounding
The unit cabinet must have an uninterrupted true earth ground. An electrical ground wire of
adequate size must be connected to the ground lug provided inside the main electrical box.
3.4
Voltage Tolerance
The supply voltage to the unit must be within tolerance; -5% to +10% for 208-230 voltage, +10%
for 460 volts. Phase to phase imbalance must not exceed 3%. The local utility company should
be contacted for correction of improper line voltage. Deviation from ratings can cause premature
failures and possibly void unit warranty.
3.5
Auxiliary Control Wiring
For secondary heat exchangers (condensers and fluid coolers) connect two 18 gauge wires from
the electrical box of the indoor evaporator to the electrical box of the remote heat exchanger. Follow
the wiring diagrams for each of these pieces of equipment. On most evaporators the terminals will
be #42 and #43. On most remote heat exchangers the terminals will be #39 and #40. All control
wiring on Data Aire equipment is 24 VAC. Condensing units (compressors mounted in condenser)
typically require more wires, refer to wiring diagrams.
Check the wiring connections in the unit control panel to ensure they are tight. Screw
terminals may become loose in transit. Tightening of wiring connections is the responsibility
of the installing contractor.
15
3.6
Remote Shutdown
Every Data Aire evaporator has remote shutdown contacts. These are intended for a field supplied
dry contact or switch to be wired across two terminals. When the contact or switch opens, the control
circuit power is interrupted and the unit shuts down, including the control panel. The control circuit
is 24 VAC and the field provided contact or switch should have a minimum rating of 10 amps.
The remote shutdown contacts are always terminals #1 and #2 on the terminal block designated
TB1. The unit will ship with a factory wired metal jumper clip that connects terminal #1 to terminal
#2. Remove this clip prior to installing the field wires.
3.7
Remote Alarm Contacts
The DAP©-III microprocessor control provides a remote alarm output contact that can be field
accessed on terminals # 11, 12 and 13 of terminal block TB2. Terminal # 12 is a Normally Closed
(NC) open on Alarm dry contact. Terminal # 13 is a Normally Open (NO) close on alarm dry
contact. Both are intended to be used in a control circuit not exceeding 4 amps at 24VAC.
These programmable output contacts will close or open on a failure and will remain open or closed
until the alarm is no longer present. Three additional alarm output contacts are available and require
the Relay Module. The terminal designations for these alarms contacts are as follows:
# 40 – Remote Alarm 2 (Common)
# 41 – Remote Alarm 2 (Normally Closed)
# 42 – Remote Alarm 2 (Normally Open)
# 43 – Remote Alarm 3 (Common)
# 44 – Remote Alarm 3 (Normally Closed)
# 45 – Remote Alarm 3 (Normally Open)
# 48 – Remote Alarm 4 (Common)
# 49 – Remote Alarm 4 (Normally Closed)
# 50 – Remote Alarm 4 (Normally Open)
3.8
Remote Sensors
Remote sensors are optional. Although existing unit mounted sensors can be removed for remote
mounting, the remote sensor option provides a more convenient means of field installation. This is
because the sensors are already connected to a predetermined length of cable and come mounted
in a remote sensor enclosure. The temperature and humidity sensors require a total of five wires,
these should be a twisted, shielded cable.
3.9
Condensate Pumps
Condensate pumps which ship loose normally require a separate source of 110 volt power. Always
check the pump power requirements before connecting power. Condensate pumps are available in
other voltages.
Condensate pumps may also come unit mounted and powered. While no outside power source
is required, field piping is still a requirement.
Condensate pumps are wired to display a “High Condensate Water Level” alarm. The wiring for
this must be done in the field on pumps that ship loose. Factory mounted pumps come pre-wired.
16
3.10 Condensate Probe
A condensate probe for sensing under floor water is included with this unit. This comes in a plastic
bag, with about 15 feet of coiled-up wire. The probe is a flat plate that is typically placed below the
unit in a location where water is likely to accumulate.
Place the probe flat on the floor on top of a thin layer of non conductive silicone. Secure the
attached wires where necessary. A longer length of wire may be used if required.
Note: Failure to uncoil the length of wire attached to the condensate probe can result
in a nuisance water-detected alarm. If the probe is not going to be used it should be
disconnected.
3.11 Water Sensing Cable
Some units may be equipped with a water sensing cable. The cable is connected to the terminal
board and ready for installation. Cable lengths will vary depending on the original order and
specifications. Typically, the cable is installed around the unit’s perimeter. The cable is supplied
with holding clips. Care should be taken when installing the cable. Be sure the cable is not touching
metal and/or any debris under the raised floor.
17
4.0 INSTALLATION OF REMOTE HEAT EXCHANGER
Air cooled condensers and fluid coolers have individual Selection Guide/Operation and Maintenance
manuals which should be referred to for more complete details.
4.1
Rigging
Secondary heat exchangers matched with evaporators of this size are typically remote, outdoor
type. The heat exchanger should be moved to its (typically rooftop) mounting location using a crane
or fork lift. Each fan section has heavy, steel leg supports with lifting holes at the top.
Do not lift with a choke sling around the unit. Spreader bars are recommended for lifting multiple
fan units. Under no circumstances should the coil headers or piping be used for lifting the unit.
Ideally, the unit should be kept in its shipping crate until it is ready to be set in place.
4.2
Leg Assembly
The legs must be unbolted from their collapsed shipping position and extended prior to placing
the unit on its pad. Each leg extends down approximately 18” and reattaches using the same bolts.
Note: Failure to extend the legs will result in poor air distribution over the cooling coil resulting in
significant capacity reduction.
NOTE: Failure to extend the legs will result in poor air distribution over the cooling coil resulting
in significant capacity reduction. DAMAGE CAUSED TO THE COMPRESSOR(S) DUE TO
OVERHEATING IS NOT COVERED BY DATA AIRE’S WARRANTY.
Concrete pads are often used to provide support for the heat exchanger. Bolt holes in the bottom
of each leg can be used to anchor the unit.
4.3
Locating the Remote Heat Exchanger
The remote heat exchanger must be located in an area that
will ensure free air flow into and out of the heat exchanger plus
adequate service access clearance. Short circuiting of the air
flow or the intake of warmer air from another unit will seriously
degrade the performance of the air cooled heat exchanger.
Do not locate the heat exchanger in a location that is
bordered by tall obstructions (i.e. higher than 10 feet) on no
more than two sides. See figure at right for minimum clearance
from obstructions and between units. With proper clearance on
all sides, two units can be placed at least 48 inches apart.
18
Noise factors should also be considered when locating an air cooled heat exchanger. Proximity
to windows, walls and surrounding structures can cause objections by the occupants. An acoustical
expert should be consulted when noise is of a particular concern.
Air cooled heat exchangers should be placed at a level that is higher than the indoor evaporator.
The mounting of the remote heat exchanger more than 10 feet below the evaporator is not
recommended. Excessive liquid line pressure drop can cause poor evaporator performance.
Piping must be supported within 18 inches of the inlet and outlet connections. The inlet connection
is located on the top header on all remote heat exchangers and the outlet connection is located on
the bottom header of all units.
4.4
Electrical Service
Refer to Sections 3.1 to 3.5 for information regarding line voltage and control voltage wiring
details.
4.5
Air Cooled Condensers - Model DARC
4.5.1 Fan Speed Control
The standard Data Aire condenser (DARC) utilizes a fan speed controller.
condensers this is the only means of control.
On single fan
Multiple fan condensers are provided with fan speed control on the first motor (nearest the header).
The fan speed control is pre-programmed and there is no need to adjust the unit in the field. The
header fan will cycle with the head pressure of the unit.
Units shipped with R-407C the starting pressure is 220 PSIG and the fan will be at full speed at
285 PSIG. Units shipped with R-410A the starting pressure is 320 PSIG and the fan will be at full
speed at 400 PSIG. The second fan operates in conjunction with the speed controlled fan. The fan
speed control powers ON the auxiliary and shifts the speed controlled fan to a new start pressure.
4.5.2 Ambient Thermostats
Additional motors (subsequent to the fan speed control operated motors) multiple fan heat
exchangers are cycled by ambient sensing thermostats. These thermostats have a capillary tube
with remote sensing bulb. They function best with the sensing bulbs mounted below the coil, away
from exposure to direct sunlight with the bulb in the vertical position. An instruction set comes as
part of a mounting kit that includes a sheet metal bracket, mounting clamps and TEK screws. This
includes directions for field mounting and adjustment. Desired head pressure should be maintained
at approximately 340-400 PSIG for R-410A and 230-270 PSIG for R-407C.
Typical settings for the ambient thermostats are as follows:
Number of Fans
2
3
4
5
Header Fan
FSC
FSC
FSC
FSC
Fan 2
Pressure Control
Pressure Control
Pressure Control
Pressure Control
Fan 3
Fan 4
Fan 5
75°
85°
85°
75°
75°
65°
19
4.6
Fluid Coolers - Model DAFC
4.6.1 Fluid-Sensing Thermostats
Fluid cooler fan motors are cycled on and off by individual water-sensing thermostats strapped
to the leaving water header. The first fan motor will only have a thermostat if the unit has an Energy
Saver Coil. Without the optional Energy Saver Coil, the first fan motor runs whenever there is a call
for cooling via an auxiliary signal sent by the indoor evaporator (see Section 3.5).
The water-sensing thermostats have adjustable setpoints which are typically staggered to maintain
water temperature in the 85° to 105° F range. This is generally the desired range for glycol cooled
systems.
A surge tank is standard on all fluid coolers. This is sufficient on most applications. However,
an expansion tank should be installed at the highest point in the system and the point of least
pressure.
4.6.2 Energy Saver Cooling
In colder climates, the evaporator will often be equipped with an additional free cooling coil to
take advantage of the colder ambient temperatures. When incoming fluid falls below the setpoint of
a water-sensing thermostat in the evaporator (typically about 50° F), energy saver cooling becomes
available.
Systems with an Energy Saver Coil should have at least one fluid-sensing thermostat on the fluid
cooler set lower to take advantage of colder ambient temperatures. The desired fluid temperature
for energy saver cooling is 45° F. Field adjustment of fluid-sensing thermostats is not unusual.
It is desirable to use the energy saver mode as much as possible. However, fluid temperature
that is too cold can cause excessive dehumidification and coil sweating. Fluid temperature that is
too high can also cause the indoor space temperature to rise. This could cause the evaporator’s
microprocessor control to lock out the energy saver mode for one hour while it reverts back to
compressor (mechanical) cooling. Adjust the setpoints of the thermostats to allow the maximum
free cooling time. Over cooling or under cooling the fluid should be avoided.
Every application will have a different ambient temperature and indoor heat load/air
distribution profile. Therefore it is not possible to dictate the exact water-sensing thermostat
setpoints. Field adjustments are typical to allow fine-tuning to specific conditions.
20
5.0 CHARGING
5.1
Voltage Phase Check
5.1.1 Evaporator
Prior to charging, the correct voltage phasing should be checked on the indoor evaporator. It
is easiest to check the blower direction on the evaporator with standard poly-phase motors by
momentarily moving the blower manual bypass switch located in the DAP-III control module to the ON
position, then back to the OFF position (there is a Power ON/OFF switch above the blower bypass
switch that must in the ON position before running the blower). Reverse any two of the three line
voltage wires at the line voltage field connection point to change the blower rotation.
Although scroll compressors are phase dependent, units shipped from the factory are run tested,
ensuring the compressor rotation is consistent with the evaporator fan motor. However, a field
change-out of a compressor may require checking proper phase. An out-of-phase compressor will
draw relatively low amps and both suction and discharge pressures will remain nearly equal.
5.1.2 Secondary Heat Exchanger
The secondary heat exchanger may be ordered as three phase but the individual fan motors are
single phase and will only run in one direction. Check operation by placing a momentary jumper
across low voltage field terminals # 30 and # 40. (Disconnect pumps on glycol systems unless already
filled with water/glycol solution.) This will energize the control circuit. Fans may not turn because
either the thermostat setpoint is above the current ambient temperature or the # 1 fan (on air cooled
condensers with fan speed control) has not reacted to the head pressure. On systems with R-410A
the fan will not operate until the head pressure is beyond 300 PSIG. Units with R-407C the head
pressure must reach 200 PSIG.
5.2
Important Refrigeration Components
5.2.1 Expansion Valve
Each refrigerant circuit has an adjustable thermo-expansion valve (TXV). These are factory
adjusted to their nominal rating. Any field adjustment should be to fine tune a system that has
stabilized and already has acceptable operating parameters. Adjusting a TXV to produce large
swings in superheat is not recommended.
5.2.2 High Pressure Cutout Switch
Each refrigerant circuit is protected by a high head pressure cutout switch with manual reset
button. The switch is typically located in the evaporator near the compressors.
The pressure rating for R-410A is 610 PSIG. The pressure rating for R-407C is 400 PSIG.
5.2.3 Low Pressure Cutout Switch
Each refrigerant circuit has a low pressure cutout switch with automatic reset. The switch is
located near the compressors.
The pressure rating for R-410A is 50 PSIG. The pressure rating for R-407C is 28 PSIG.
21
5.3
Air Cooled Systems
5.3.1 Fan Speed Control System Charging
The standard air cooled condenser provided with Data Aire equipment has fan speed control on
the lead motor (nearest the header). After the field refrigerant piping is properly completed connect
the refrigerant drum to the low side and charge with vapor. (Refer to Section 2.6 LEAK TESTING
and Section 2.7 EVACUATION prior to charging the system.)
It is likely that more refrigerant will be required to complete the charging procedure (line runs
need to be taken into account). Make sure all hoses are properly purged. From a vacuum feed liquid
refrigerant into the high side of the system until the pressure equalizes. At this point there will be
about 70-80% of the total charge in the system.
Before starting a compressor, the crankcase heater should be energized for a minimum of 12
hours to reduce the possibility of liquid slugging on start-up. Failure to energize the crankcase heater
could result in compressor damage.
If the system is charged from a vacuum, the preheating of the compressor is not necessary. Start
the system and allow the system to stabilize to room temperature. Bubbles in the sight glass are not
unusual at this point and can be caused by flashing from liquid line pressure drop, low sub-cooling
or low charge. It is likely that more refrigerant will be required to complete the charging procedure.
Adjust the refrigerant charge until the sub-cooling is between 8 and 10°F. There may be flashing
and/or bubbles in the sight glass when the system is properly charged.
The system should be allowed to stabilize for 15 to 20 minutes before meaningful measurements
can be taken. After the system is allowed to stabilize, verification of a few key measurements should
be noted. The discharge pressure with R-410A should be between 340-415 PSIG and the sub-cooling
should be between 8-10°F depending on ambient conditions. Units with R-407C the discharge
pressure should be between 240-295 PSIG. Suction temperature should be 100 PSIG or greater
with R-410A and 58 PSIG or greater with R-407C. Measure the superheat at the compressor suction
line at least 6 inches away from the compressor. The superheat should be between 8-15°F.
Note: Charging to a full liquid line sight glass should never be the sole means of determining the
correct refrigerant charge. Other parameters such as superheat, suction pressure, head pressure,
sub-cooling and ambient temperature are also important. A system charged to a clear sight glass
is often overcharged.
5.3.2 Flooded System Charging
Flooded type systems are units having refrigerant circuits with an optional liquid receiver and head
pressure control valve. When the ambient temperature falls during cold weather, the head pressure
control valve will regulate the flow of refrigerant to ensure nearly constant receiver pressure. The
condenser is partially flooded with liquid in cold weather. In warm weather the extra refrigerant is
stored in the receiver.
Flooded systems require more refrigerant than fan speed control systems. Connect the pressure
gauge manifold set to the high and low ports near the compressor. Connect the charging line to
the refrigerant tank and set it for liquid feed. Open the refrigerant tank valve and purge the line.
22
Open the high side valve on the manifold only and allow the refrigerant to flow until the system
pressure equalizes. At this point the system will have 78-85% of the total refrigerant charge.
Start the (evaporator) motor(s). Start the compressor(s) and check the operating pressures and
temperatures.
A quick and easy way to run the blower and compressor is using the manual switches on the
unit’s microprocessor. Switch the blower and compressor manual switches to the ON position. All
automatic control is disabled but safety switches will remain functional.
Before starting a compressor, the crankcase heaters should be energized for a minimum of 12
hours to reduce the possibility of liquid slugging on start-up. Failure to energize crankcase heaters
could result in compressor damage.
Start the evaporator fan and verify the fan rotation. From a vacuum, add liquid refrigerant to the
high side of the system until the pressures equalize. Start the compressor. Check the liquid line
sight glass to get a feel for the approximate charge. Bubbles in the sight glass are not unusual at
this point and be caused by flashing from liquid pressure drop, low sub-cooling or low charge. It is
likely that more refrigerant will be required to complete the charging procedure.
If the receiver (head) pressure is below 350 PSIG for R-410A, block part of the condenser coil
surface until the pressure rises to 350 PSIG or higher. If the receiver (head) pressure is below 230
PSIG with R-407C, block part of the condenser coil surface until the pressure rises to 230 PSIG or
higher. During extremely cold weather all the condenser fans have to be de-energized to maintain
head pressure. Add refrigerant to the system until the ball in the sight-glass is at the 1/3 level.
After the system is allowed to stabilize, the superheat at the compressor suction line (reading from
at least 6 inches from the sight glass) should be 8 – 15°F. Remove any blocks that may have been
used on the condenser coil. If the ambient temperature is below 60°F, some of the refrigerant will
be backed up in the condenser coil causing the liquid level in the receiver to drop (this is normal).
Note: Charging to a full liquid line sight glass should never be the sole means of determining the
correct refrigerant charge. Other parameters such as superheat, suction pressure, head pressure,
sub-cooling and ambient temperature are also important. A system charged to a clear sight glass
is often overcharged.
5.4
Water/Glycol Cooled Systems
5.4.1 Water/Glycol Cooled Systems Charging
All water/glycol cooled units are factory charged with refrigerant. The water regulating valve
should be adjusted to maintain a discharge pressure between 340–390 PSIG for R-410A and 230260 for R-410A. Saturated suction pressure should be 100 PSIG or higher with R-410A and 58 PSIG
or greater with R-407C. The superheat at the compressor suction line at least 6 inches away from
compressor should be between 8-15°F.
Field charging water/glycol system should be done by referring to the unit electrical nameplate
for factory charge. Although this figure represents the original factory charge, it is still necessary
to measure and note proper unit operation including superheat, head and suction pressure. Some
adjustment to charge may be required.
23
Adjust the refrigerant charge until the sight glass clears or has only sparse bubbles. The unit
should be allowed to stabilize for several minutes before meaningful measurements can be taken
and the conditioned room should be at or near the temperature setpoint.
All water/glycol cooled units have a water regulating valve. A head pressure transducer is
connected to a shraeder fitting on the discharge line and water is regulated into the condenser coil.
Plate fin condensers are standard.
Before starting a compressor, the crankcase heaters should be energized for a minimum of 12
hours to reduce the possibility of liquid slugging on start-up. Failure to energize crankcase heaters
could result in compressor damage.
Note: Charging to a full liquid line sight glass should never be the sole means of determining the
correct refrigerant charge. Other parameters such as superheat, suction pressure, head pressure,
sub-cooling and ambient temperature are also important. A system charged to a clear sight glass
is often overcharged.
5.5 Refrigerant Handling
The use of recovery/recycling units is required by U.S. Environmental Protection Agency (EPA)
regulations. Technicians who service and dispose of air conditioning and refrigeration equipment
must recover the refrigerant instead of venting it to the atmosphere.
Except for extremely small releases of refrigerant such as what occurs when disconnecting
service hoses (diminimous release), a technician who knowingly releases or vents refrigerant to the
atmosphere is in violation of this regulation. Freon purchasers must be certified technicians and
have a valid EPA certification card.
6.0 GLYCOL SYSTEMS
6.1
Glycol Concentration
The system must be filled with water and the appropriate amount of ethylene or propylene glycol
to protect against winter freeze-up. To achieve the approximate glycol concentration, it is necessary
to know the total system volume. This consists of the sum of the fluid cooler volume, the evaporator
unit volume, and the volume of the interconnecting piping.
The following tables can be used for arriving at an approximate system volume. After installation,
the glycol percentage should be checked. The glycol percentage should also be checked at regular
intervals to ensure freeze protection.
24
6.2
Internal (Fluid) Volume - Downflow Models
Evaporator
Model
DAGD 06
DAGD 08
DAGD 10
DAGD 13
DAGD 16
DAGD 20
DAGD 26
DAGD 30
Without Energy Saver Coil
Volume, Gallons
4.0
4.5
5.0
5.5
7.5
8.0
10.0
12.0
With Energy Saver Coil
Volume, Gallons
9.1
9.6
10.1
10.6
16.3
16.8
18.8
22.9
6.3 Internal (Fluid) Volume - Upflow Models
Evaporator
Model
DAGU 06
DAGU 08
DAGU 10
DAGU 13
DAGU 16
DAGU 20
DAGU 26
DAGU 30
Without Energy Saver Coil
Volume, Gallons
4.0
4.5
5.0
5.5
7.5
8.0
10.0
12.0
With Energy Saver Coil
Volume, Gallons
8.2
8.7
9.2
9.2
15.9
16.8
16.3
23.1
Note: Add 25% more for Shell and Tube condenser coils.
6.4
Fluid Cooler Internal Volume
Fluid Cooler
Model
DAFC 06
DAFC 07
DAFC 09
DAFC 11
DAFC 15
DAFC 17
DAFC 21
DAFC 24
DAFC 28
DAFC 30
Internal Volume
Volume, Gallons
2.5
3.4
4.2
3.3
4.9
6.6
7.4
9.8
12.3
9.8
25
Fluid Cooler
Model
DAFC 37
DAFC 40
DAFC 44
DAFC 50
DAFC 57
DAFC 61
DAFC 75
DAFC 80
DAFC 88
DAFC 100
6.5
Internal Volume
Volume, Gallons
13.0
16.3
16.2
20.3
24.6
19.6
26.0
32.6
32.4
40.6
Copper Piping Internal Volume
Pipe Diameter
inches
5/8
3/4
7/8
1-1/8
1-5/8
2-1/8
2-5/8
3-1/8
4-1/8
6.6
Freezing Point of Aqueous Solutions
Ethylene Glycol
% by Volume
0
10
20
30
40
50
26
Volume per 100 Feet
of Pipe, Gallons
1.2
1.8
2.5
4.3
9.2
16.1
24.8
35.4
62.2
Freezing Point
Degrees F
32
24
15
4
-13
-33
Propylene Glycol
% by Volume
0
10
20
30
40
50
Freezing Point
Degrees F
32
27
18
8
-6
-26
7.0 CONTROLS
7.1
DAP© III Microprocessor Control Panel
The standard controls on all Data Aire Series equipment is the DAP III microprocessor control
panel. This state-of-the-art control panel has a separate manual that goes into extensive detail
regarding functions, features, programming, and troubleshooting.
The DAP III microprocessor control panel has an entire manual dedicated to its use and operation.
This manual must be referenced to complete a thorough unit installation. Start-up is not complete
until the DAP III control panel settings are established.
7.2
Secondary Heat Exchangers
Most of the controls on remote condensers, condensing units, and fluid coolers consist of basic
electromechanical type components. Secondary heat exchangers have separate Selection Guide/
Operation and Maintenance manuals which give complete details on adjusting thermostat settings,
etc. Refer also to details in Section 3.5 within this manual.
7.3
Wiring Diagrams
Every Data Aire evaporator, condenser, condensing unit, or fluid cooler comes with a wiring
diagram. These diagrams are ‘ladder’- type schematics intended for service personnel. The intent
is to allow the technician to understand the wiring details associated with the electrical components
and how they interface with the DAP III control panel as well as peripheral equipment, including
secondary heat exchangers.
The wiring diagram in the evaporator will indicate field interface terminals to the secondary heat
exchanger. The internal wiring of the heat exchanger is found on a separate diagram which can be
found on the inside cover of the heat exchanger electrical box. Both diagram types are also placed
inside the shipping/warranty packet that is placed inside the evaporator.
Evaporator wiring diagrams will have a drawing number which starts out with the three letter
designation, “DAX”. An example of a typical diagram is DAX-S-603 N. Wiring diagrams for condensers
or condensing units start out with the three letter designation, “DRC”. An example of a typical diagram
is DRC-S-001. Wiring diagrams for fluid coolers start out with the three letter designation, “DFC”.
An example of a typical diagram is DFC-S-001.
27
8.0 REGULAR MAINTENANCE ITEMS
8.1
Filters
Filters should be checked on a regular basis and changed when they become dirty. This will
ensure efficient operation of the unit. Although the unit has a dirty filter alarm, this should not be
relied on as the only determinant for replacing filters. A maladjusted filter differential pressure switch
may not give a proper indication of a clogged filter.
To check the filter differential pressure switch for proper adjustment, temporarily cover about
75% of the return air opening using heavy cardboard or similar material. The alarm should energize
when 75% of the air is blocked, simulating dirty filters. If the alarm energizes prematurely or does not
energize at all, the pressure switch should be adjusted. Doors must remain closed when determining
if an adjustment is necessary.
Spare filters should be kept in stock as these tend to be a frequently replaced maintenance item.
Filters may require changing as often as monthly. Note also that construction dust on new installations
will quickly clog new filters.
Filters that require changing can restrict airflow and create problems such as coil icing or poor
air distribution.
8.2
Belts
Belt tension should be checked regularly (monthly) to ensure proper tension. If tightening is
required, loosen the four motor mounting bolts. Turn the adjustment screw on the end of the motor
mounting channel until the proper belt tension is attained. Retighten the four mounting bolts. Damage
can also occur to belts that are overtightened. The amount of play in a typical drive set should be
1/2 inch.
8.3
Bearings
Pillow block bearings used on many models have zerk type grease fittings. These will require
grease at least annually - use NLGI grade 2 lithium or lithium complex grease. Care should be taken
to avoid over-greasing. Only one or two pumps from a manual gun are required. All other blower
bearings are permanently lubricated and do not require maintenance.
On units having sealed type ball bearings with clamps on collars or retaining rings, proper torque
for collar or retaining rings is 65-70 in-lbs. Ensure that collars or retaining rings are perpendicular
to the shaft, if they are not perpendicular damage to the blower shaft will occur.
Most blower motors have sealed bearings and are maintenance free. Some motors have zirk
type grease fittings on the bearings. If so the motor should be greased once annually. Care should
be taken to avoid over-greasing. Only one or two pumps from a manual gun are required.
8.4
Humidifier Canisters
Steam generator type humidifier is standard on Data Aire Series equipment. There is no
maintenance required other than to replace the canister as required. This frequency will depend on
usage and water type. A set of manufacturer’s instructions for the humidifier is sent as part of the
paperwork placed inside the unit when it ships.
28
8.5 Fuses
Fuses will occasionally require changing especially with installations where the voltage is not
consistent. Drops in voltage can create brief periods of high amp draw, causing fuses to blow. Always
replace fuses with those of the equivalent rating with regard to: 1) amperage, 2) voltage, and 3)
speed. For instance compressors and motors are inductive loads which require time delay fuses.
Electric reheat and humidifiers are resistive loads requiring fast acting fuses.
8.6 Heating Elements
Heating elements do not normally require maintenance. However sometimes they may accumulate
a film of dust or dirt when unused for extended periods of time. When energized, the burning debris
can create smoke or unpleasant odor. To help avoid this, periodic cleaning is recommended.
8.7 Refrigerant Filter Drier
Factory installed refrigerant filter driers do not normally require maintenance. When replacing
compressors or other repairs that open the refrigeration system to atmosphere, it is advisable to
replace the filter drier. The equivalent type and size should be used.
29
9.0 Warranty Policy
Data Aire Inc. warrants your Data Aire environmental control unit to be free from defects in material
and workmanship under normal use and service for a period of (18) eighteen months from date of
shipment. Our obligation under this warranty shall be limited to repairing or replacing any part or
parts, (F.O.B. Orange, California), of your Data Aire unit, which, in our judgment, shows evidence
of defect within the period of time heretofore set forth. Upon our request, the said part(s) shall be
returned to Data Aire Inc. at Orange, California, transportation charges prepaid. LABOR is not
covered by this warranty.
ADDITIONAL MOTOR-COMPRESSOR LIMITED WARRANTY: Data Aire Inc. offers for sale additional
motor-compressor limited warranties, which warrants the motor-compressor to be free from defective
material or workmanship under normal use and service for an additional period as indicated above
immediately following the expiration of the STANDARD LIMITED WARRANTY and will repair or
replace (F.O.B. Orange, California) the motor-compressor found by it to have become inoperative
due to defects in material or workmanship, provided that inspection by Data Aire Inc. established
the validity of the claim.
The ADDITIONAL MOTOR-COMPRESSOR LIMITED WARRANTY does not include such parts as
the cabinet, electrical components and controls, refrigerant, refrigerant tubing, expansion valve(s),
pressure relief device, fan motor, filters, water regulating valve(s), if used, or any parts other than
the motor-compressor. Failure(s) due to the condition of the water supply or failure due to the entry
of water to the motor-compressor as a result of a freeze-up are also excluded.
These warranties cannot be transferred or assigned by you and shall run only in favor of the original
owner-user of the Data Aire Inc. unit.
Prior written authorization by Data Aire, Inc. is required for the return of any parts, which are deemed
to be defective.
These warranties shall not apply to the replacement of air filters, belts, refrigerant, customer provided
parts, heaters not regularly cleaned, correction or conditions due to inadequate or improper air or
water supply, improper or incorrectly connected duct work, inadequate wiring, power supply, blown
fuses, humidifier cylinders, light bulbs and infrared lamps, or if, in our judgment, your Data Aire Inc.
unit has been subjected to misuse, negligence, accidental damage caused in transit, damage caused
by lack of protection from extreme environmental conditions, tampering, alteration in any way, or if
the serial number has been abused, altered, defaced, or removed. Additionally, these warranties
shall not apply, if in the judgment of Data Aire Inc., the unit has not been serviced and maintained
regularly in accordance with established maintenance procedures.
Parts that are project specific and deemed special (non-Data Aire catalog items) which are installed
and provided by Data Aire Inc. shall be subject to Data Aire’s vendor’s standard warranty. Data Aire
will not stock or maintain inventory on such parts. Replacement of project specific parts will be subject
to vendor’s standard lead times.
Data Aire Inc. shall not be liable for any default or delay in performance under these warranties when
caused by any contingencies beyond our control, including war, government restrictions or restraints,
strikes, fires, floods, acts of nature or inadequate raw material supplies.
Except as stated above, Data Aire Inc. makes no warranty or guarantee, expressed or implied.
30
10.0 Contact Data Aire
Address:
Data Aire Inc.
230 W. BlueRidge Avenue
Orange, CA 92865
Phone
714-921-6000
800-347-AIRE (2473)
Toll Free
714-921-6010
714-921-6011
714-921-6022
Main
Engineering
Part Sales
Fax:
E-mail:
tech_support@dataaire.com
engineering@dataaire.com
sales@dataaire.com
Technical Support
Engineering
Sales
Web site:
www.dataaire.com
Job information:
Evaporator
Model Number: DA__ __ - __ __ __ __ - __ __
Serial Number: __ __ __ __ - __ __ __ __ - __
Condenser/Fluid Cooler:
Model Number: D __ __ __
__ __ __ __ - __ __
Serial Number: __ __ __ __ - __ __ __ __ - __
Job number: _______________________________________
Date installed: ___ / ___ / 201___
Installing Contractor: ________________________________
31
RECOMMENDED LINE SIZING FOR AIR COOLED SPLIT SYSTEMS
UP TO 200 EQUIVALENT FEET
HOT GAS LINES
SINGLE CIRCUIT SYSTEMS
Tons per
EQUIVALENT FEET
Unit
Tonnage
1
1.5
2
2.5
3
4
5
6
8
10
13
Circuit 50
1
5/8
1.5
5/8
2
5/8
2.5
5/8
3
7/8
4
7/8
5
7/8
6
7/8
8
1-1/8
10
1-1/8
13
1-1/8
100
5/8
5/8
7/8
7/8
7/8
7/8
1-1/8
1-1/8
1-1/8
1-1/8
1-3/8
150
5/8
7/8
7/8
7/8
7/8
7/8
1-1/8
1-1/8
1-3/8
1-3/8
1-3/8
DUAL CIRCUIT SYSTEMS
EQUIVALENT FEET
Unit
Tons per
Tonnage Circuit
6
3
8
4
10
5
13
6.5
16
8
20
10
26
13
30
15
200
7/8
7/8
7/8
7/8
7/8
1-1/8
1-1/8
1-1/8
1-3/8
1-3/8
1-3/8
50
7/8
7/8
7/8
7/8
1-1/8
1-1/8
1-1/8
1-3/8
100
7/8
7/8
1-1/8
1-1/8
1-1/8
1-1/8
1-3/8
1-3/8
150
7/8
7/8
1-1/8
1-1/8
1-3/8
1-3/8
1-3/8
1-3/8
200
7/8
1-1/8
1-1/8
1-1/8
1-3/8
1-3/8
1-3/8
1-5/8
LIQUID LINES
SINGLE CIRCUIT SYSTEMS
Tons per
EQUIVALENT FEET
Unit
Tonnage Circuit
1
1
1.5
1.5
2
2
2.5
2.5
3
3
4
4
5
5
6
6
8
8
10
10
13
13
50
3/8
3/8
3/8
3/8
1/2
1/2
1/2
1/2
5/8
5/8
7/8
100
3/8
3/8
1/2
1/2
1/2
5/8
5/8
5/8
7/8
7/8
7/8
150
3/8
3/8
1/2
1/2
1/2
5/8
5/8
5/8
7/8
7/8
7/8
DUAL CIRCUIT SYSTEMS
EQUIVALENT FEET
Unit
Tons per
Tonnage Circuit
6
3
8
4
10
5
13
6.5
16
8
20
10
26
13
30
15
200
3/8
3/8
1/2
1/2
1/2
5/8
5/8
5/8
7/8
7/8
7/8
50
1/2
1/2
1/2
1/2
5/8
5/8
7/8
7/8
100
1/2
5/8
5/8
5/8
7/8
7/8
7/8
7/8
150
1/2
5/8
5/8
5/8
7/8
7/8
7/8
7/8
200
1/2
5/8
5/8
5/8
7/8
7/8
7/8
7/8
SUCTION LINES
SINGLE CIRCUIT SYSTEMS
EQUIVALENT FEET
Unit
Tons per
Tonnage Circuit
1
1.5
2
2.5
3
4
5
6
8
10
13
1
1.5
2
2.5
3
4
5
6
8
10
13
50
HOR
7/8
7/8
7/8
7/8
7/8
1-1/8
1-1/8
1-1/8
1-3/8
1-3/8
1-3/8
HOR
7/8
7/8
7/8
7/8
1-1/8
1-1/8
1-1/8
1-3/8
1-3/8
1-5/8
1-5/8
150
VER
7/8
7/8
7/8
7/8
7/8
1-1/8
1-1/8
1-1/8
1-3/8
1-3/8
1-5/8
HOR
7/8
7/8
7/8
7/8
1-1/8
1-1/8
1-3/8
1-3/8
1-3/8
1-5/8
1-5/8
200
VER
7/8
7/8
7/8
7/8
7/8
1-1/8
1-1/8
1-1/8
1-3/8
1-5/8
1-5/8
HOR
7/8
7/8
1-1/8
1-1/8
1-1/8
1-3/8
1-3/8
1-5/8
1-5/8
1-5/8
2-1/8
VER
7/8
7/8
7/8
7/8
7/8
1-1/8
1-1/8
1-3/8
1-3/8
1-5/8
1-5/8
DUAL CIRCUIT SYSTEMS
EQUIVALENT FEET
Unit
Tons per
Tonnage Circuit
32
100
VER
7/8
7/8
7/8
7/8
7/8
1-1/8
1-1/8
1-1/8
1-3/8
1-3/8
1-3/8
50
6
8
10
13
16
20
3
4
5
6.5
8
10
HOR
7/8
1-1/8
1-1/8
1-1/8
1-3/8
1-3/8
26
30
13
15
1-3/8
1-5/8
100
150
200
VER
7/8
1-1/8
1-1/8
1-1/8
1-3/8
1-3/8
HOR
1-1/8
1-1/8
1-1/8
1-3/8
1-3/8
1-5/8
VER
7/8
1-1/8
1-1/8
1-1/8
1-3/8
1-3/8
HOR
1-1/8
1-1/8
1-3/8
1-3/8
1-3/8
1-5/8
VER
7/8
1-1/8
1-1/8
1-1/8
1-3/8
1-5/8
HOR
1-1/8
1-3/8
1-3/8
1-5/8
1-5/8
1-5/8
VER
7/8
1-1/8
1-1/8
1-3/8
1-3/8
1-5/8
1-3/8
1-3/8
1-5/8
1-5/8
1-5/8
1-5/8
1-5/8
2-1/8
1-5/8
1-5/8
2-1/8
2-1/8
1-5/8
1-5/8
HOR = HORIZONTAL
VERT = VERTICAL
Data Aire, Inc.
Monthly Maintenance Inspection Checklist
Model No.__________________
Prepared by: _______________
Air Filters
___ Check for restricted air flow
Serial No. ____________________
Date:
___ / ___/ 201__
___ Check canister for deposits and water level
___ Check condition of steam hose and clamps
Blower Section
Infrared Humidifier (if applicable)
___ Blower wheel free of debris moves freely
___ Check humidifier lamps
___ Check belt tension and condition
___ Check pan for mineral deposits
___ Bearings in good condition
___ Check pulleys and motor mounts
Electrical Panel
___ Check contactor operation
Air Distribution Section
___ DAP III control panel operations
___ Check for restriction in grille(s)
Equipment Runtimes
Compressor
Blower
_________ hrs
___ Check oil levels (Semi-compressor only)
Condenser
_________ hrs
___ Check for leaks
Compressor No.1 _________ hrs
Compressor No. 2 _________ hrs
Refrigeration Cycle/Section
Reheat No. 1
_________ hrs
___ Check crank case temperature
Reheat No. 2
_________ hrs
Reheat No. 3
_________ hrs
Air Cooled Condenser (if applicable)
Humidifier
_________ hrs
___ Condenser coil clean
Dehumidification _________ hrs
___ Motor mounts tight
Energy Saver
_________ hrs
___ Motor fan bearings in good condition
___ Refrigeration lines properly supported
___ Reset all to read zero runtimes
Water/Glycol Fluid Cooler (if applicable)
Temperature/Humidity set at: ___° ___% RH
___ Water regulating valve function
___ Check for water/glycol leaks (piping area) Notes: ______________________________
_____________________________________
Glycol Pump(s)
_____________________________________
___ Glycol leaks (pump area)
_____________________________________
___ Pump operation
_____________________________________
___ Auto air vent clean of mineral deposits
_____________________________________
_____________________________________
Condensate Drain and Pump (if applicable)
_____________________________________
___ Check for water leaks
_____________________________________
___ Check for restricted air flow
_____________________________________
___ Pump operation
_____________________________________
Steam Generating Humidifier
33
Data Aire, Inc.
Quarterly Maintenance Inspection Checklist
Model No. _______________________
Prepared by: _____________________
Air Filters
____ Check for restricted air flow
____ Check filter differential switch
____ Wipe filter rack section clean
Blower Section
____ Blower wheel free of debris and moves freely
____ Check belt tension and condition
____ Bearings in good condition
____ Check air flow safety switch operation
____ Check pulleys and motor mounts
Air Distribution Section
____ Check for restriction in grille(s)
Serial No. ___________________________
Date:
___ / ___/ 201__
Steam Generating Humidifier
____ Check canister for deposits and water level
____ Check condition of steam hose and clamps
____ Check drain and fill valve for deposits
Infrared Humidifier (if applicable)
____ Check humidifier lamps
____ Check pan for mineral deposits
____ Check high limit switch operation
____ Check drain timer operation
____ Check drain valve operation
Reheat
____ Check reheat element(s) for dust
____ Check high limit switch operation
Compressor
____ Check oil levels (Semi-hermetic compressor only)
Electrical Panel
____ Check for leaks
____ Check fuses
____ Check contactor operation
Refrigeration Cycle/Section
____ Check all electrical connections
____ Check for moisture (site glass)
____ Check operation sequence
____ Check suction pressure
____ Check calibration of change over thermostat
____ Check discharge pressure
(Energy Saver System Only)
____ Check hot gas bypass valve operation
DAP
III
control panel operations
____ Check thermostatic expansion valve op
____
Check calibration of temperature sensor (47*)
____ Check solenoid valve operation
____ Check calibration of humidity sensor (48*)
____ Check calibration of discharge air sensor (49*)
Air Cooled Condenser (if applicable)
* DAP III menu options
____ Condenser coil clean
____ Motor mounts tight
____ Motor fan bearings in good condition
____ Refrigeration lines properly supported
____ Heated receiver site glass #1 __ #2 __
Water/Glycol Fluid Cooler (if applicable)
____ Water regulating valve function
____ Check solution _____%
____ Check for water/glycol leaks (piping area)
____ Water/Glycol flow switch operational
Glycol Pump(s)
____ Glycol leaks (pump area)
____ Pump operation
____ Auto air vent clean of mineral deposits
Condensate Drain and Pump (if applicable)
____ Check for water leaks and restricted flow
____ Pump operation
34
Equipment Runtimes
Blower
Condenser
Compressor No.1
Compressor No. 2
Reheat No. 1
Reheat No. 2
Reheat No. 3
Humidifier
Dehumidification
Energy Saver
____________
____________
____________
____________
____________
____________
____________
____________
____________
____________
hrs
hrs
hrs
hrs
hrs
hrs
hrs
hrs
hrs
hrs
____Reset all to read zero runtimes
Temperature/Humidity set at: _____° _____% RH
Notes: _____________________________________
____________________________________________
____________________________________________
Superheat and Suction Pressure
Trouble Shooting Guide
Low Suction Pressure and High Superheat
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
Moisture, dirt, wax
Undersized valve*
High superheat adjustment
Gas charge condensation
Dead thermostatic element charge
Wrong thermostatic charge
Evaporator pressure drop - no external equalizer
External equalizer location
Restricted or capped external equalizer
Low refrigerant charge
Liquid line vapor
a. Vertical lift
b. High friction loss
c. Long or small line
d. Plugged drier or strainer
12. Low pressure drop across valve
a. Same as #11 above
b. Undersized distributor nozzle or circuits
c. Low condensing temperature
High Suction Pressure - Low Superheat
1.
2.
3.
4.
5.
6.
7.
8.
Oversized valve*
TEV seat leak
Low superheat adjustment
Bulb installation
a. Poor thermal contact
b. Warm location
Wrong thermostatic charge
Bad compressor - low capacity
Moisture, dirt, wax
Incorrectly located external equalizer
Low Suction Pressure - Low Superheat
1. Low load
a. Not enough air
b. Dirty air filters
c. Coil icing
2. Poor air distribution
3. Poor refrigerant distribution
4. Improper compressor-evaporator balance
5. Evaporator oil logged
6. Flow from one TEV affecting another’s bulb
* Data Aire has ensured that valves are size properly as the unit ships from the factory.
35
Temperature Pressure Chart
Temperature (°F)
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
55
60
65
70
75
80
85
90
95
100
105
110
115
120
125
130
135
140
145
150
36
R-22
50.0
51.2
52.4
53.7
54.9
56.2
57.5
58.8
60.2
61.5
62.9
64.3
65.7
67.1
68.6
70.0
71.5
73
74.5
76.1
77.6
79.2
80.8
82.4
84.1
92.6
101.6
111.3
121.5
132.2
143.7
115.7
168.4
181.9
196.0
210.8
226.4
242.8
260.0
278.1
297.0
316.7
337.4
359.1
381.7
R-407C
43.6
44.7
45.9
47.1
48.4
49.6
50.9
52.1
53.4
54.8
53.2
57.5
58.9
60.3
61.7
63.1
64.6
66.1
67.6
69.1
70.6
72.2
73.8
75.1
77.1
106.0
116.2
127.0
138.5
150.6
163.5
177.0
191.3
206.4
222.3
239.0
256.5
274.9
294.2
314.5
335.7
357.8
380.9
405.1
430.3
Pressure-Pounds per Square inch gauge - standard type
R-410A
89.7
91.6
93.5
95.5
97.5
99.5
101.6
103.6
105.7
107.9
110.0
112.2
114.4
116.7
118.9
121.2
123.6
125.9
128.3
130.7
133.2
135.6
138.2
140.7
143.3
156.6
170.7
185.7
201.5
218.2
235.9
254.6
274.3
295.0
316.9
339.9
364.1
389.6
416.4
444.5
474.0
505.0
537.6
571.7
607.6
Correction Factor for Superheat Measurement
6
Expected Error Degrees F
5.5
5
4.5
4
3.5
3
2.5
2
105
50
Abmbient Temperature Degree F
37
- A Air Cooled Systems ...........9, 10, 18-22
Air Filters .......................................... 28
Air Vents ........................................... 11
Ambient Thermostats ....................... 19
Auxiliary Wiring ................................. 14
- B Bearings ........................................... 28
Belts .................................................. 28
- C Cable, Water Sensing ....................... 17
Charging ........................................... 21
Air Cooled Fan Speed Systems .. 22
Air Cooled Flooded Systems ....... 22
Water/Glycol Systems ................. 23
Coils
Auxiliary Chilled Water ................ 25
Condenser ................................... 25
Evaporator ................................... 25
Fluid Cooler ..............................25-6
Volume see Volume
Compressors
Crankcase Heaters ............... 22, 23
Manual Bypass/Override ....... 21, 22
Condensate Cable ............................ 17
Condensate Probe ............................ 17
Condensate Pumps .......................... 16
Condensers ...............10, 15, 18-22, 27
Condensing Units ........10,15,18-22, 27
Connection Sizes
Air Cooled Units ............................ 9
Fluid Coolers ............................... 12
Water/Glycol Cooled Units .......... 12
Contact Data Aire ............................. 31
Controls ............................................ 27
DAP III Control Panel .................. 27
Secondary Heat Exchangers ...... 27
Wiring Diagrams .......................... 27
Crankcase Heaters ..................... 22, 23
- D DAP III Control Panel ....................... 27
Differential Pressure Switch ............. 28
Discharge Lines ...................... 9, 10, 32
Disconnect Switch .............................. 6
38
INDEX
- E Electrical ........................................... 15
Evaporator................................... 16
Energy Saver .............................. 20
Expansion Valve ............................... 21
Expansion Tank ................................ 13
Evaporator ....................6-13, 15, 22-23
- F Fan Speed Control Systems.......... 19, 21
Field Piping ...................................... 9, 32
Air Cooled ...................... 9, 10, 11, 32
Auxiliary Chilled Water ................... 13
Condensate .................................... 13
Condenser...................... 9, 10, 11, 32
Condensing Unit............................. 11
Dry Steam Humidifier ..................... 13
Fluid Cooler .................................... 12
Glycol Cooled ..................... 11, 25, 26
Steam Generator Humidifier .......... 13
Water Cooled ................................. 13
Field Wiring...............................15-17, 21
Remote Alarm Contacts ................. 16
Remote Condenser .................. 15, 21
Remote Condensing Unit .............. 15
Remote Fluid Cooler ................ 15, 21
Remote Sensors ............................ 16
Remote Shutdown.......................... 16
Filter
Air ................................................... 28
Drier ............................................... 29
Differential Pressure Switch ........... 28
Flooded Systems ........................... 10, 22
Floorstands ............................................ 7
Flow Switch ......................................... 11
Fluid Coolers ... 11, 12, 15, 18, 21, 23, 25
Fluid Sensing Thermostats .................. 20
Freezing Point, Aqueous Solutions...... 26
Fuses ................................................... 29
- G Glycol Concentration ........................... 24
Glycol Systems
.................. 12, 16, 19, 20, 22, 23, 24
Grounding ......................................... 15
- H Head Pressure ...............................24-24
Control Valve .................................. 23
Cutout Switch ................................. 21
Water Regulating Valve .................. 24
Heat
Crankcase ................................ 22, 23
Electric ........................................... 29
Reheat Elements............................ 29
High Pressure Cutout Switch............... 21
Humidifier ...................................... 13, 28
Canister .......................................... 28
Dry Steam Humidifier ..................... 13
Steam Generator Humidifier .... 13, 28
- I Inspection .............................................. 6
Installation ..............................6-8, 18, 19
Internal Volume see Volume
- J Jackstands............................................. 7
- L Liquid Lines ............................. 10, 11, 32
Leak Testing ........................................ 14
Locating ........................................... 7, 18
Evaporator........................................ 7
Secondary Heat Exchanger ........... 18
- M Maintenance ........................................ 28
Bearings ......................................... 28
Belts ............................................... 28
Filters ............................................. 28
Fuses ............................................ 29
Heating Elements ........................... 29
Humidifier Canisters ....................... 28
Refrigerant Filter Drier.................... 29
- P Paperwork ............................................. 8
Piping See Field Piping
Probe, Condensate........................ 17, 18
Pumps
Centrifugal ...................................... 12
Condensate .................................... 13
- R Receivers............................................. 23
Recovery ............................................. 24
Refrigerant ......................................21-24
Charge see Charging
Handling ......................................... 24
Recovery ........................................ 24
Reheat
Elements ........................................ 29
Electric ........................................... 29
Remote
Alarm Contacts.............................16
Condensers .......... 10, 15, 19-23, 27
Condensing Units . 10, 15, 19-23, 27
Fluid Coolers..... 12, 15, 18, 20, 24, 26
Sensors ........................................16
Remote Shutdown........................13
Rigging ..........................................6, 18
- S Secondary Heat Exchange
.................. 10-12, 15, 21-24, 25, 27
Sight Glass ..................................22, 23
Strainer ..............................................11
Subcooling ...................................22, 23
Suction Lines ...........................9, 10, 32
Superheat .................................... 22-24
- T Thermo-expansion Valve (TXV) ........21
Thermostats
Ambient ..................................19, 20
Fluid Sensing ...............................20
Traps ...........................................10, 11
- V Valves
Head Pressure Control.................22
Humidifier Makeup Water .............14
Shutoff ..........................................11
Water Regulating .........................24
Voltage...................................15, 19, 21
Phase Check ................................21
Volume
Copper Piping ..............................26
Fluid Coolers ..........................25, 26
Internal Fluid, Downflow ...............25
Internal Fluid, Upflow ...................25
- W Warranty ............................................30
Water Sensing Cable .........................17
Water Sensing Probe ........................17
Wiring ....................................15, 16, 21
- Z Zirk Fittings ........................................28
39
230 W. BlueRidge Avenue
Orange, CA 92865
800-347-2473
www.dataaire.com
e-mail: sales@dataaire.com
A Member of the CS Group of Companies
© 2010 Data Aire, Inc.
Data Aire, Inc. reserves the right to make design changes for the purpose of product improvement or to withdraw any design without notice.
DADXIOM-0210