Trane CyberRow DX Installation and operating instructions

CyberRow DX
Row-Based Precision Air Conditioners
12 kW - 33 kW / 60 Hz
Installation, Operation, and Maintenance
April 2023 AH-SVX015A-EN
SAFETY WARNING
Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of
heating, ventilating, and air-conditioning equipment can be hazardous and requires specific knowledge and training.
Improperly installed, adjusted or altered equipment by an unqualified person could result in death or serious injury.
When working on the equipment, observe all precautions in the literature and on the tags, stickers, and labels that are
attached to the equipment.

©2023 Trane AH-SVX015A-EN
Introduction
Read this manual thoroughly before operating or servicing this
unit.
Warnings, Cautions, and Notices
Safety advisories appear throughout this manual as required.
Your personal safety and the proper operation of this machine
depend upon the strict observance of these precautions.
Important Environmental Concerns
Scientific research has shown that certain man-made
chemicals can affect the earth’s naturally occurring
stratospheric ozone layer when released to the atmosphere. In
particular, several of the identified chemicals that may affect
the ozone layer are refrigerants that contain Chlorine, Fluorine
and Carbon (CFCs) and those containing Hydrogen, Chlorine,
Fluorine and Carbon (HCFCs). Not all refrigerants containing
these compounds have the same potential impact to the
environment. Trane advocates the responsible handling of all
refrigerants.
Important Responsible Refrigerant
Practices
Trane believes that responsible refrigerant practices are
important to the environment, our customers, and the air
conditioning industry. All technicians who handle refrigerants
must be certified according to local rules. For the USA, the
Federal Clean AirAct (Section 608) sets forth the requirements
for handling, reclaiming, recovering and recycling of certain
refrigerants and the equipment that is used in these service
procedures. In addition, some states or municipalities may
have additional requirements that must also be adhered to for
responsible management of refrigerants. Know the applicable
laws and follow them.
The three types of advisories are defined as follows:
WARNING Indicates a potentially hazardous
situation which, if not avoided, could
result in death or serious injury.
CAUTION Indicates a potentially hazardous
situation which, if not avoided, could
result in minor or moderate injury. It could
also be used to alert against unsafe
practices.
NOTICE Indicates a situation that could result in
equipment or property-damage only
accidents.
WARNING
Proper Field Wiring and Grounding
Required!
Failure to follow code could result in death or serious
injury. All field wiring MUST be performed by qualified
personnel. Improperly installed and grounded field
wiring poses FIRE and ELECTROCUTION hazards. To
avoid these hazards, you MUST follow requirements for
field wiring installation and grounding as described in
NEC and your local/state/national electrical codes.
WARNING
Personal Protective Equipment (PPE)
Required!
Failure to wear proper PPE for the job being undertaken
could result in death or serious injury. Technicians, in
order to protect themselves from potential electrical,
mechanical, and chemical hazards, MUST follow
precautions in this manual and on the tags, stickers,
and labels, as well as the instructions below:
• Before installing/servicing this unit, technicians
MUST put on all PPE required for the work being
undertaken (Examples; cut resistant gloves/sleeves,
butyl gloves, safety glasses, hard hat/bump cap, fall
protection, electrical PPE and arc flash clothing).
ALWAYS refer to appropriate Safety Data Sheets
(SDS) and OSHA guidelines for proper PPE.
• When working with or around hazardous chemicals,
ALWAYS refer to the appropriate SDS and OSHA/GHS
(Global Harmonized System of Classification and
Labeling of Chemicals) guidelines for information on
allowable personal exposure levels, proper
respiratory protection and handling instructions.
• If there is a risk of energized electrical contact, arc, or
flash, technicians MUST put on all PPE in accordance
with OSHA, NFPA 70E, or other country-specific
requirements for arc flash protection, PRIOR to
servicing the unit. NEVER PERFORM ANY
SWITCHING, DISCONNECTING, OR VOLTAGE
TESTING WITHOUT PROPER ELECTRICAL PPE AND
ARC FLASH CLOTHING. ENSURE ELECTRICAL
METERS AND EQUIPMENT ARE PROPERLY RATED
FOR INTENDED VOLTAGE.

Introduction
AH-SVX015A-EN 3
Copyright
This document and the information in it are the property of
Trane, and may not be used or reproduced in whole or in part
without written permission. Trane reserves the right to revise
this publication at any time, and to make changes to its content
without obligation to notify any person of such revision or
change.
Trademarks
All trademarks referenced in this document are the trademarks
of their respective owners.
WARNING
Follow EHS Policies!
Failure to follow instructions below could result in
death or serious injury.
• All Trane personnel must follow the company’s
Environmental, Health and Safety (EHS) policies
when performing work such as hot work, electrical,
fall protection, lockout/tagout, refrigerant handling,
etc. Where local regulations are more stringent than
these policies, those regulations supersede these
policies.
• Non-Trane personnel should always follow local
regulations.

4AH-SVX015A-EN
Table of Contents
Model Number Descriptions . . . . . . . . . . . . . . . . 6
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Product Description . . . . . . . . . . . . . . . . . . . . . 7
Product Warranty . . . . . . . . . . . . . . . . . . . . . . . 7
General Design . . . . . . . . . . . . . . . . . . . . . . . . 7
Electrical Compartment . . . . . . . . . . . . . . . . 8
Circuit Breakers/Motor Start Protectors . . . . 8
Compressor . . . . . . . . . . . . . . . . . . . . . . . . . 8
Electronic Thermal Expansion Valve . . . . . . 8
Coil(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Condensate Pump . . . . . . . . . . . . . . . . . . . . 9
EC Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Temperature/Humidity Sensors . . . . . . . . . . 9
Optional Equipment . . . . . . . . . . . . . . . . . . . . . 9
Temperature/Humidity Sensor . . . . . . . . . . . 9
Water Detector . . . . . . . . . . . . . . . . . . . . . . . 9
Smoke Detector . . . . . . . . . . . . . . . . . . . . . . 9
Firestat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Receiving the equipment . . . . . . . . . . . . . . . . 10
Moving the equipment . . . . . . . . . . . . . . . . . . 10
Site preparation . . . . . . . . . . . . . . . . . . . . . . . 10
Conditioned Space . . . . . . . . . . . . . . . . . . . 10
Mounting/Placement . . . . . . . . . . . . . . . . . . . 11
Air Distribution . . . . . . . . . . . . . . . . . . . . . . . . 11
Optional Equipment (Field Installed) . . . . . . 12
Remote Water Detectors . . . . . . . . . . . . . . 12
Remote Temperature/Humidity Sensor . . . 12
Outdoor Condensers . . . . . . . . . . . . . . . . . 13
Water- Water/Glycol Cooled DX
(CRS-W and CRS-G Models) . . . . . . . . . . . . 13
Piping connections . . . . . . . . . . . . . . . . . . . 13
Split Air Cooled Systems (CRS-A Models) . 14
Refrigerant Piping . . . . . . . . . . . . . . . . . . . 15
Remote Air Cooled Condensers . . . . . . . . 16
Condensate Drain Line . . . . . . . . . . . . . . . 17
Utility Connections . . . . . . . . . . . . . . . . . . . . . 17
Main Power . . . . . . . . . . . . . . . . . . . . . . . . .17
Optional Equipment . . . . . . . . . . . . . . . . . . .19
Outdoor Equipment . . . . . . . . . . . . . . . . . . .19
System Charging Procedures . . . . . . . . . . . . .21
Water-Water/Glycol Cooled Systems . . . . .21
Remote Air-Cooled Systems . . . . . . . . . . . .21
Refrigerant Characteristics . . . . . . . . . . . . .24
Settings and Adjustments . . . . . . . . . . . . . . . .24
Water-Water/Glycol Circuit . . . . . . . . . . . . .24
Low/High Pressure Limit Switch . . . . . . . . .25
Electronic Expansion Valve . . . . . . . . . . . . .25
Hot Gas Bypass . . . . . . . . . . . . . . . . . . . . . .25
EC Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Start-up/Commissioning . . . . . . . . . . . . . . . . . . .26
Initial Operation . . . . . . . . . . . . . . . . . . . . . . . .26
Step by Step Start-up Instructions . . . . . . . . .26
Microprocessor Controller Programming . . . .26
E² Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
User Interface Display Panel . . . . . . . . . . . .27
Controller I/O Module . . . . . . . . . . . . . . . . . .28
BMS Interface . . . . . . . . . . . . . . . . . . . . . . .28
Navigating Controller Display Screens . . . . . .29
Menu selection . . . . . . . . . . . . . . . . . . . . . . .29
Menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Display Variables . . . . . . . . . . . . . . . . . . . . .29
Cursor Position in Screens . . . . . . . . . . . . .29
Modifiable Variables . . . . . . . . . . . . . . . . . . .30
Password Authorization Levels . . . . . . . . . .30
System Operation . . . . . . . . . . . . . . . . . . . . . .31
Setpoint Adjustment . . . . . . . . . . . . . . . . . . .32
Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Summary Alarm . . . . . . . . . . . . . . . . . . . . . .33
Customer Alarms . . . . . . . . . . . . . . . . . . . . .33
Custom Alarms . . . . . . . . . . . . . . . . . . . . . .33
Controller operation . . . . . . . . . . . . . . . . . . . . .33
Control Signals . . . . . . . . . . . . . . . . . . . . . . .34

Table of Contents
AH-SVX015A-EN 5
Control Methods . . . . . . . . . . . . . . . . . . . . . 35
Operating Configurations . . . . . . . . . . . . . . 35
Air Flow/Fan Speed Control . . . . . . . . . . . . 35
Remote On/Off . . . . . . . . . . . . . . . . . . . . . . 36
Menu Screens . . . . . . . . . . . . . . . . . . . . . . . . 36
Main Menu . . . . . . . . . . . . . . . . . . . . . . . . . 36
Information Menu Loop . . . . . . . . . . . . . . . 36
Alarm Log Menu . . . . . . . . . . . . . . . . . . . . . 39
Control Menu . . . . . . . . . . . . . . . . . . . . . . . . . 40
Control Menu Loop . . . . . . . . . . . . . . . . . . . 40
Service Menu . . . . . . . . . . . . . . . . . . . . . . . . . 43
Service Menu Loop . . . . . . . . . . . . . . . . . . 43
Communication with Controller . . . . . . . . . . . 49
Work Group Set-up . . . . . . . . . . . . . . . . . . 49
Configuring a Work Group . . . . . . . . . . . . . 50
BMS Communication . . . . . . . . . . . . . . . . . . . 58
Direct BMS Control . . . . . . . . . . . . . . . . . . 58
BMS Communication . . . . . . . . . . . . . . . . . 58
Troubleshooting the Control I/O
Module Signal LEDs . . . . . . . . . . . . . . . . . . . 58
BMS Parameters, Version 1.2 . . . . . . . . . . . 59
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Periodic General Maintenance . . . . . . . . . . . 63
Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
EC Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Drain Pans . . . . . . . . . . . . . . . . . . . . . . . . . 64
Condensate Pump . . . . . . . . . . . . . . . . . . . 64
A/C System . . . . . . . . . . . . . . . . . . . . . . . . 64
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . 65
Field Service . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Water-Water/Glycol System . . . . . . . . . . . . 66
DX System . . . . . . . . . . . . . . . . . . . . . . . . . 67
Refrigeration System Repairs . . . . . . . . . . 67
Component Replacement . . . . . . . . . . . . . 68
Product Support . . . . . . . . . . . . . . . . . . . . . . . . . 69
Factory Authorized Start-up/Warranty
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Technical Support . . . . . . . . . . . . . . . . . . . 69
Obtaining Warranty Parts . . . . . . . . . . . . . . 69
Obtaining Spare/Replacement Parts . . . . . .69
Appendix A CRS-042-G Preventive Maintenance
Inspection Checklist . . . . . . . . . . . . . . . . . . . . . . .70

6AH-SVX015A-EN
Model Number Descriptions
Digit 1, 2, 3 — System
CSR = CyberRow System
Digit 4, 5, 6 — Nominal Capacity
MBh
042
084
Digit 7 — Cooling Method
C = Chilled Water
G = Glycol Cooled DX
W = Water Cooled DX
A = Air Cooled DX

AH-SVX015A-EN 7
Overview
General
The CyberRow precision data center air conditioning system
covered by this manual is designed and manufactured by
vendor Air Technology Systems, Inc. (vendor) and uses the
latest, state-of-the-art control technology. Recognized as a
world leader, vendor provides air conditioning systems using
the finest materials available in the industry. The unit will
provide years of trouble free service if installed and maintained
in accordance with this manual. Damage to the unit from
improper installation, operation or maintenance is not covered
by the warranty.
STUDY the instructions contained in this manual. They must
be followed to avoid difficulties. Spare parts are available from
vendor to insure continuous operation. Using substitute parts
or bypassing electrical or refrigeration components in order to
continue operation is not recommended and will VOID THE
WARRANTY. Due to technical advancements, components
are subject to change without notice.
All CyberRow systems are designed to be installed indoors.
Product Description
CyberRow systems are available in Water cooled, Water/
Glycol cooled or Air cooled Direct Expansion (DX)
configurations. DX based CyberRow systems are designed to
operate with R410A refrigerant.
DX based CyberRow cabinets are 12 -inches wide. The
cooling capacity in BTU/Hr will depend on the compressor
size. Refer to the unit nameplate to identify the capacity of your
system.
Note: CyberRow systems have been designed to capture
and neutralize heat within close coupled rack-based
environments. Any use beyond what is described in
this manual is deemed to be not intended. Vendor is not
liable for any damage resulting from improper use.
The functional mode of operation is cooling which provides
localized cooling to offset hot spots in data centers.
The CyberRow system captures high temperature (hot aisle)
discharge air from adjacent rack-based IT equipment and
reintroduces it as conditioned air through the front of the unit
(cold aisle).
The system is equipped with highly reliable EC (Electronically
Commutated) fans which offer considerable energy cost
savings and long life. Using an electronically commutated
permanent magnet DC motor, AC inverter whine is eliminated.
Fan speed is continuously adjustable via a signal from the
system controller without the use of VFDs. EC fans offer
energy efficient, quiet, low vibration operation.
An advanced E² series microprocessor controller is mounted
inside the CyberRow electric box. The controller provides the
following features: input/output monitoring status, full
integrated control of cooling, multi-unit control, and remote
communication with a Building Management System (BMS).
The controller may interface directly to a BMS, allowing the
ability to monitor the performance of the air conditioner and
adjust operating parameters.
The E² user interface display panel is typically factory mounted
on the front access panel of the unit.
Refer “E² Controller,” p. 27 for detailed instructions on
operating the system controller.
Product Warranty
See the contract.
General Design
The CyberRow unit is housed in a steel frame type cabinet
rated for indoor use. The exterior of the cabinet is coated with
a powder coat finish to protect against corrosion. Removable
access panels are located on the front and rear of the cabinet
for easy access to all components. Operator controls are
conveniently located on the front of the cabinet.
Note: Customer specified non standard features or design
variations may not be described in this manual. Refer
to the installation and/or electrical drawings supplied
with your unit for details of additional feature(s). In
some cases, an addendum to this manual may also be
included to further describe the feature(s).
Figure 1, p. 8 depicts a typical internal layout and identifies the
major components of a typical CyberRow unit utilizing Direct
Expansion (DX) refrigerant. The location of some components
may vary depending on the cooling configuration selected
(Water, Water/Glycol or Air Cooled).

Overview
8AH-SVX015A-EN
Electrical Compartment
The electrical components are protected inside an electric box
located behind the rear access panel. The electric box cover is
safety interlocked with the service disconnect switch (See
Figure 1) preventing the cover from being opened when the
switch in the On position. The switc h must be turne d O ff to gain
access to the electrical compartment.
The service disconnect switch may be used to turn the unit off
for emergency shutdown or when routine maintenance is
performed. The handle of the switch may be locked in the Off
position to prevent unintended operation.
Circuit Breakers/Motor Start Protectors
CyberRow units incorporate state of the art component
protection with the use of motor start protectors and circuit
breakers. If an overload occurs the switches must be manually
re-set after the overload condition is cleared.
Compressor
A scroll compressor is utilized in DX based CyberRow
systems. With fewer moving parts, scroll compressors have
demonstrated superior
durability. The scroll compressor is designed around two
identical spirals or scrolls that, when inserted together, form
crescent shaped pockets. During a compression cycle, one
scroll remains stationary while the other scroll orbits around the
first. As this motion occurs, gas is drawn into the scrolls and
moved in increasingly smaller pockets toward the center. At
this point, the gas, now compressed to a high pressure, is
discharged from a port in the center if the fixed scroll. During
each orbit, several pockets of gas are compressed
simultaneously, creating smooth, nearly continuous
compression.
Electronic Thermal Expansion Valve
An auxiliary control module mounted to the door of the electric
box, manages the operation of the electronic expansion valve
(EEV). The control module manages the EEV based on input
signals from the suction pressure and temperature sensors. It
regulates the amount of refrigerant entering the evaporator to
maintain the correct superheat temperature.
Electronic Hot Gas Bypass
Used for freeze protection and capacity control, an
electronically controlled hot gas bypass valve is managed by
the same auxiliary control module that manages the EEV
valve. The hot gas bypass system allows the compressor to
run continuously instead of cycling the compressor on and off
for capacity control. The hot gas bypass system manages
system capacity based on the suction temperature. The hot
gas regulator valve meters hot gas into the evaporator coil
during low load periods or when evaporator air flow is reduced.
Coil(s)
Cooling coils are aluminum finned/copper tube construction.
The coils are leak tested and cleaned before installation by the
factory. Condensate drain pans are provided to collect water
condensed by the coils. The drain pans are emptied by a
condensate pump that directs the water to a pipe stub located
either at the top or the bottom of the A/C unit depending on the
piping configuration (see Figure 9, p. 14 and Figure 11, p. 16).
A float switch is placed in the lower condensate pan to detect
if the water level rises. If the condensate pan fails to drain, the
Figure 1. Typical internal layout- CRS-042/084
NOTE: CABINET ACCESS PANELS REMOVED TO SHOW INTERNAL PARTS.
AIR FILTERS
SWING-OUT
HINGE
EC FAN (3)
ELECTRIC BOX
DISCONNECT
SWITCH
COMPRESSOR
PIPE TRANSITION
PLATE
EVAPORATOR
COIL
T/H SENSOR
LEVEL
ADJUSTMENT
SCREW (4)
CASTER
HOUSING (4)
DRAIN PANS
CONDENSER
(CRS-W and CRS-G
UNITS ONLY)
FLOAT SWITCH
ELECTRICAL
KNOCK-OUTS
ELECTRICAL
KNOCK-OUTS (IN
BOTTOM OF BOX)
PIPING/ELECTRICAL
KNOCK-OUTS
(IN FLOOR OF CABINET)

Overview
AH-SVX015A-EN 9
float switch signals the controller to annunciate an alarm and
turn off the compressor and the fans.
Condensate Pump
A condensate pump is factory installed in the lower drain pan.
The pump automatically eliminates condensate water from the
drain pan. The pump has an internal float switch which turns
the pump on and off based on the water level.
EC Fans
The unit is equipped with three high efficiency, Electronically
Commutated (EC) fans. EC fans utilize a brushless motor
equipped with permanent magnets and permanently
lubricated ball bearings. The fan impellers are backward
curved and attached to the rotor casing. The fan is balanced
and aerodynamically optimized to minimize vibration.
The fans do not utilize drive belts. Fan speed is variable via a
0 to 10 VDC signal from the system controller. The fan motor
is equipped with integral electronics and does not require the
addition of secondary electronics such as thermal protection,
inverters or filters. The fan will not produce AC inverter whine.
During start-up, the fans begin operating in stages with five
second time delays. The middle fan starts first, then the upper
fan, then the lower fan. The system controller monitors fan
operation. If one or two of the fans fail to operate, the controller
alerts the operator with an alarm message and increases the
speed of the remaining fan(s) to compensate for the loss of air
flow.
The system controller may be used to configure the fans with
all three fans operating at the same variable speed (see “Air
Flow/Fan Speed Control,” p. 35).
Temperature/Humidity Sensors
Control and alarm recognition takes place by means of the
controller analyzing signal inputs from the sensors to manage
the operation of the A/C unit consistent with the setpoints
entered in the system controller. The system controller
monitors a 4-20 mA temperature/humidity (T/H) sensor.
The return air is monitored by a temperature/humidity (T/H)
sensor which is typically mounted inside the cabinet. As an
option, the return air T/H sensor may be removed from the
cabinet and mounted in the hot aisle. The actual sensor values
may be viewed from the controller user interface display using
the Information menu loop.
Optional Equipment
Remote Mounted Supply
Temperature/Humidity Sensor
As an option, a supply T/H sensor may be provided for field
installation (see “Remote Temperature/Humidity Sensor,”
p. 12). This is to be mounted in the supply (cold aisle) space for
monitoring or control purposes. Refer to the electrical drawing
supplied with your unit for wiring details specific to your
system.
Water Detector
As an option, vendor offers spot type or strip/cable type water
detectors (see “Remote Water Detectors,” p. 12). Upon
sensing a leak, the water detector control circuit will signal the
system controller of the alarm condition. The system controller
is programmed to shut down the compressor and the fans
when a leak is detected.
Smoke Detector
Optionally mounted in the return air side of the cabinet, a
photo-electric smoke detector is used to sense the presence of
smoke and signal the controller when a smoke alarm condition
exists and shuts down the air conditioner.
Firestat
Optionally mounted in the return air side of the cabinet, a fire
detector senses high return air temperature and signals the
controller when a fire alarm condition exists and shuts down
the air conditioner.

10 AH-SVX015A-EN
Installation
Receiving the equipment
CyberRow precision A/C system has been tested and
inspected prior to shipment. Carefully remove the protective
packaging and perform a visual inspection of the equipment
immediately upon delivery to confirm that your equipment has
been received in excellent condition. Remove the access
panels and thoroughly inspect the interior of the unit for any
signs of transit-incurred damage. If there is shipping damage,
it must be noted on the freight carriers delivery forms BEFORE
signing for the equipment. Any freight claims MUST be done
through the freight carrier. vendor ships all equipment FOB.
vendor can assist in the claim filing process with the freight
carrier. Should any damage be present, notify vendor Product
Support prior to attempting any repairs. Refer “Product
Support,” p. 69 of this manual for instructions.
A unit Data Package has been sent with your unit. It contains
this manual, system drawings, applicable MSDSs, warranty
registration, other component manuals and applicable
instructions based on the configuration of your unit. The data
package has been placed in your unit in a clear plastic bag.
These documents need to be retained with the unit for future
reference. The unit should always be stored indoors in a dry
location prior to installation.
Note: Items that have been shipped loose, such as the
controller display panel, temperature/ humidity
sensors, water detectors, etc., are shipped inside the
air conditioner unless specified otherwise by the
customer. Unpack and store these items in a safe place
unless you are using them immediately.
Moving the equipment
CyberRow systems are designed to be kept in a vertical
position. The cabinet is equipped with shipping support
brackets which are bolted to the skid to facilitate moving the
unit prior to installation. Move the unit on the skid with a suitable
device such as a forklift, pallet jack or roller bar and dollies
which are capable of handling the weight of the equipment. For
reference, a weight table is provided on the installation
drawing. Unbolt the shipping support brackets from the skid,
leaving them attached to the unit during the installation
process.
Important: If the shipping brackets must be removed
before installing the server racks on each side,
physically support each side of the cabinet to
prevent it from tipping over.
Once the cabinet is removed from the shipping skid, it may be
rolled into position on the casters which are mounted to the
bottom of the unit. Do not remove the shipping support
brackets unless server racks are installed on each side of the
CyberRow cabinet.
The cabinet is equipped with an adjustable foot at each corner
to raise the cabinet off the casters after the unit is positioned
in its operating location. The adjustable feet are also used for
leveling and overall height correction. To adjust the height, use
a flat head screwdriver to turn the screws, located at the top of
the four caster housings (accessed inside the front and rear
corners of the cabinet per Figure 1, p. 8). Raise or lower each
foot until the cabinet is level and even with the adjacent
equipment racks (see Figure 2, p. 11).
Site preparation
Removable access panels are located on the front and rear of
the CyberRow cabinet for easy service access. In order to
have full service access to the internal components, no
permanent obstructions should be placed in front or behind the
cabinet.
Note: Working clearance requirements need to be
established prior to mounting the unit. Refer to local
and national electrical codes.
Important:
•The unit must in installed in an air-conditioned space.
•Ensure the mounting surface is capable of supporting
the weight of the equipment. Before installing the unit,
refer to the weight table provided on the installation
drawing.
When determining the installation location, consider how you
will route the piping and wiring into the cabinet and ensure
access is available (see “Piping connections,” p. 13 and
“Refrigerant Piping,” p. 15). The CyberRow system is ordered
from the factory with pilot holes for piping and wiring in either
the top or the bottom of the cabinet. See the installation
drawing provided with your unit for the pilot hole locations.
Conditioned Space
Certain steps should be taken to minimize the effects of the
environment surrounding the conditioned space. This is
especially important for critical/ precision room preparation
(computer data centers) requiring close tolerance control of
WARNING
Risk of Unit Tipping!
Failure to keep shipping support brackets in place
while moving and positioning the cabinet will result in
an unstable unit which could tip and result in death or
serious injury.
Ensure that the shipping support brackets are attached
to the front and rear of the cabinet after removing the
unit from the skid.
NOTICE
Unit Damage!
Failure to follow the instruction below could result in
damage to the unit.
When moving the unit, lift it vertically and keep it in a
level position.

Installation
AH-SVX015A-EN 11
temperature and humidity. The conditioned space should be
well insulated and include a vapor barrier. The installer should
ensure that the proper insulation rating is used based on the
design of the space, which was the basis for the system
selected. The following table is a recommended minimum R-
value (thermal resistance) to ensure optimum equipment
operation.
The vapor barrier is the single most important requirement for
maintaining environmental control in the conditioned space.
The vapor barrier in the ceiling and walls can be a polyethylene
film. Concrete walls and floors should be painted with a rubber
or plastic based paint. Doors and windows should be properly
sealed and a door sweep used to minimize leakage. Outside
or fresh air should be kept to a minimum (as it adds to the
cooling load), while maintaining the requirement of the Indoor
Air Quality (IAQ) standard. Lack of these steps can cause
erratic operation, unstable room control and excessive
maintenance costs.
Mounting/Placement
The CyberRow precision A/C system uses a frame and panel
construction for unit rigidity and full service accessibility while
the unit is mounted in place.
Note: The equipment must be level to operate properly.
CyberRow cabinets are designed to be installed in a row of
servers between the server racks (see Figure 2 and Figure 3).
They have a compact footprint, which allows the units to be
placed adjacent to the heat producing equipment racks
anywhere in the row. They provide cool, conditioned air
through the front grille to the adjacent server modules on the
cold aisle side of the row. It is recommended to position the unit
to obtain optimum air circulation. Allow 36 inches clearance in
the front and rear of the cabinet for servicing the unit.
The optimal placement location is next to highly loaded servers
that throw off the most significant heat into the hot aisle side of
the row. In this arrangement, the CyberRow minimizes hot
spots. It is best not to place a CyberRow unit at the end of a row
unless an air barrier is in place to prevent the conditioned air
from being drawn around to the hot aisle side, bypassing the
front of the servers. An air barrier must also be present to
prevent conditioned air from being drawn over the top of the
row into the hot aisle.
Note: Placement of air barriers between the cold aisle/ hot
aisle is important. If the supply discharge is too close to
the hot aisle, the conditioned supply air will be
recirculated back to the intake in the hot aisle side of
the cabinet before it has circulated through the
equipment to be cooled.
Air Distribution
Air from the hot aisle is drawn into the rear of the CyberRow
cabinet and passes through the fins of the cooling coil. The
conditioned supply air discharges through the front of the
cabinet (see Figure 3).
The front discharge panel directs the supply air out of the
CyberRow unit where it will be drawn into the front of the server
racks.
An optional front diverted air discharge panel is also available.
This directs the supply air sideways out of the CyberRow unit
and directly into the front of the server racks (see Figure 4,
p. 12).
Table 1. Thermal resistance
Structure R-Value
Ceiling R-38
Wall R-21
Floor R-19
Door R-5
Figure 2. Recommended installation
Figure 3. Typical air distribution
Server
Racks
CyberRow
Units
36”
36”
Recommended
Clearance Front and
Rear
CyberRow Unit CyberRow Unit
Server Rack
Server Rack
Server Rack Server Rack Server Rack
Hot Aisle
Cold Aisle

Installation
12 AH-SVX015A-EN
Optional Equipment (Field
Installed)
Note: Do not mount any optional equipment on the unit
access panels.
Remote Water Detectors
The remote water detector is normally placed on the sub-floor
or in a field supplied auxiliary drain pan located beneath the
unit. Vendor provides 2 types of water detectors:
Spot type water detector
Remove the protective cover and connect two control wires to
the terminals on the base. Run the control wires into the
electric box and connect them to the control terminal block as
shown in the wiring diagram provided with your unit. Replace
the cover and place the water detector(s) on the floor with the
metal electrodes facing down. When water is present, current
will flow between the electrodes. The base is provided with a
mounting hole in the center which may be used to secure the
water detector in place.
Note: Do not place the spot type water detector on an
electrically conductive surface.
Cable type water detector
Lay the cable water detector fl at across the sub-floor where
water could collect.
Secure the cable every 12-18 inches with J-clips or cable ties
with adhesive mounting pads when installing it in the airstream.
Secure it at each turn of the cable and when routing it around
obstructions. Do not tie the water detector cable to a metal floor
stand or to pipes.
When a water leak on the floor reaches the cable, current will
flow between the cable wires. A two conductor wire harness is
provided with a quick connect fitting on the end. The harness
mates to the fitting on the water detector and connects it to the
control terminal block inside the electric box as shown in the
wiring diagram provided with your unit.
Remote Temperature/Humidity Sensor
Depending on the type of control selected, the temperature/
humidity (T/H) sensor may be factory mounted or shipped
loose for field installation. The remote sensor must be located
so that it will prop- erly sense the temperature/humidity
conditions to be controlled. The T/H sensor should not be
mounted near a doorway or an area where it would be exposed
to direct sunlight. When locating the sensor, consider the
length of wire to be used. The sensor is typically provided with
a 20 foot long cable. As an option, a 75 foot or 150 foot long
cable may be provided. Follow the steps below to mount the
sensor.
1. Remove the cover from the base of the sensor by
squeezing it at the top and bottom.
2. Place the base temporarily against the mounting surface.
3. Level the base. Mark and drill mounting holes through at
least two of the available slotted holes.
Figure 4. Front diverted air distribution
Figure 5. Spot type water detector
Hot Aisle
Cold Aisle
CyberRow Unit CyberRow Unit
Server Rack
Server Rack
Server Rack Server Rack Server Rack
Figure 6. Cable type water detector
Figure 7. Remote temperature/Humidity sensor
NOTICE
Sensor Damage!
The sensors can be damaged if handled improperly.
Do not damage the exposed temperature/humidity
sensors on the PC board when the cover is removed.
Do not touch the sensor as this will affect its accuracy.

Installation
AH-SVX015A-EN 13
4. Run the 3 conductor shielded cable through the opening in
the base, then secure the base with screws ensuring the
word TOP on the PC board is oriented upward.
5. Make the wiring connections. Refer to “Utility
Connections,” p. 17, and refer to the wiring diagram
supplied with your unit.
6. Seal the hole in the wall behind the sensor.
7. Replace the cover plate on the base.
Outdoor Condensers
Referring to the IOM manual provided with the condenser,
install the remote condenser in a secure location where it
cannot be tampered with and the service disconnect switch
cannot be inadvertently turned off. Locate the remote
condenser where the fan is not likely to draw dirt and debris into
the coil fins. The clearance around the condenser should be at
least 1x the units width to ensure adequate airflow to the coil.
Secure the condenser to prevent the system from moving
during operation. It is recommended that the remote
condenser be installed with vibration mounts to reduce
vibration transmitted to the mounting surface.
Water- Water/Glycol Cooled DX
(CRS-W and CRS-G Models)
The system utilizes an external source of fluid to provide
coolant to the condenser inside the A/C unit. No refrigeration
connections are required for self-contained water or glycol
cooled systems (see Figure 8).
Piping connections
Important: The cooling coil (and associated piping
circuits) are pressurized (up to 100 psi) and
sealed when they leave the factory. Before
installing the interconnecting piping, release
the pressure via an available stem valve or
schrader valve prior to uncapping the pipes.
Fluid supply and return lines are routed to either the top or
bottom of the cabinet as specified when the CyberRow system
is ordered (see Figure 9, p. 14). On units that are piped from
the top, the supply and return connections are made outside
the cabinet. On units that are piped from the bottom, the supply
and return connections are made inside the cabinet.
Pipe connections are threaded NPT connections. The pipes
are labeled; i.e. Supply, Return. When making the
connections, a teflon tape thread sealant is recommended to
minimize internal fouling of the piping.
Field piping is not necessarily the same size as the units pipe
connections. Piping should be sized to match the system
pressure drop and flow capacity, and may require reducing
fittings to match the connection size on the air conditioner. An
air vent and several schrader valves are installed in the
precision A/C unit piping. It is recommended to provide manual
shut-off valves for both the supply and return fluid for isolating
the unit when performing routine maintenance or repairs.
Refer to the piping diagram supplied with your unit
Note: A 60-mesh strainer should be installed in the supply
pipe. Ensure the strainer is readily accessible for
servicing or replacement.
For pipe connection sizes, refer to Tab l e 2 :
Figure 8. Typical W/G piping diagram
TEMPERATURE
SENSOR
T
COMPRESSOR
CONNECTIONS
CONDENSER WATER
IN
WATER REGULATING
VALVE
OUT
OPTIONAL PIPING
CONNECTION
SWITCH LIMIT
SCHRADER
HIGH PRESSURE HP
VALVE
WATER COOLED CONDENSER
DRIER/STRAINER
REFRIGERANT
LP
SCHRADER
VALVE
LIMIT SWITCH
LOW PRESSURE
DISTRIBUTOR BODY
EVAPORATOR COIL
PT
PRESSURE
TRANSDUCER
ELECTRONIC
EXPANSION
VALVE
PT
PRESSURE
TRANSDUCER
REGULATOR
HOT GAS
ASC
ELECTRONIC
SIGHT
GLASS
Table 2. Pipe connection sizes
Model #
Water Glycol
Inlet/Outlet (in.)
Condensate
Drain (in.)
CRS-042-W, -G 1 1/4 1/2
CRS-084-W, -G 1 1/4 1/2

Installation
14 AH-SVX015A-EN
Note: Use standard refrigeration practices for piping, leak
testing and filling the water glycol circuit.
The piping should be isolated by the use of vibration isolating
supports. Provide supports (clamps or hangers) as necessary
every 5 to 10 feet along piping runs to minimize vibration and
noise transmission.
To reduce vibration transmission and prevent pipe damage,
seal openings in walls using a soft flexible material to pack
around the piping. After the piping is installed, seal the gaps
between the pipes and the entrance holes so air will not leak
around the pipes.
Note: Water/Glycol lines should be insulated to prevent
condensation from forming on the pipes if ambient dew
point temperatures are higher than the fluid
temperatures.
Important: After the interconnecting piping is installed, the
entire piping circuit must be thoroughly flushed
prior to operating the system.
If newly installed supply and return piping is used, it is
recommended that the piping system be cleaned prior to
connecting it to the unit. If solvents/cleaning solutions are
used, ensure they are completely flushed from the piping
before connecting it to the unit. Failure to do so could result in
equipment problems.
Split Air Cooled Systems (CRS-A
Models)
Split air-cooled systems with a remote condenser will require
field installed refrigerant piping. All split systems are shipped
with a dry nitrogen charge of 100 psig. Release the pressure
via an available stem valve or schrader valve prior to
uncapping the pipes. Do not release the pressure until the field
installed refrigerant piping is ready to connect. Systems
utilizing a remote condenser will require a copper liquid line
and discharge line. See Figure 10, p. 15 and refer to the
Installation, Operation, and Maintenance documentation
provided with the condenser.
Figure 9. Water-Water/Glycol supply and return piping connections
RECEPTACLE
PIPE
THREADS
CONDENSATE
DRAIN- 1/2” FPT
SCHRADER
VALVE
SCHRADER
VALVE
PRONG PIPE
THREADS
TOP ACCESS PIPING BOTTOM ACCESS PIPING

Installation
AH-SVX015A-EN 15
Refrigerant Piping
Refrigerant lines for the A/C unit are routed to either the top or
bottom of the cabinet as specified when the CyberRow system
is ordered (see Figure 11, p. 16).
The connections are made inside the cabinet. The pipe stubs
are labeled; i.e. Discharge, Liquid Line.
The refrigerant piping should be isolated by the use of vibration
isolating supports. Provide supports (clamps or hangers) as
necessary every 5 to 10 feet along piping runs to minimize
vibration and noise transmission. To reduce vibration
transmission and prevent pipe damage, when sealing
openings in walls use a soft flexible material to pack around the
piping. After the piping is installed, seal the gaps between the
pipes and the entrance holes in the cabinet so air will not leak
around the pipes.
All refrigeration piping should be installed with high
temperature brazed joints. Use standard refrigeration
practices for piping, leak testing, dehydration and charging of
the refrigeration circuits. For copper to copper brazing,
phosphorous alloy containing a minimum of 15% silver is
recommended. General purpose silver brazing alloy with 45%
silver is recommended for brazing dissimilar metals.
Wrap wet rags around the pipes between the areas to be
soldered and any nearby refrigeration components to keep
excessive heat from traveling through the pipe and causing
damage. Clear all pipe connections of debris and prep
connections for soldering. Use only L or K grade refrigerant
copper piping. Be careful not to allow solder/piping debris to
get inside refrigerant lines. Dry nitrogen should be flowing
through the tubing while soldering at a rate of not less than 1-
2 CFM (0.028-0.57 M 3/ minute).
Figure 10. Typical remote air cooled DX piping diagram
SIGHT
REFRIGERANT
FILTER/DRIER
REMOTE AIR COOLED CONDENSER
COMPRESSOR
HP
LIMIT SWITCH
HIGH PRESSURE
VALVE
SCHRADER LP
VALVE
SCHRADER
LIMIT SWITCH
LOW PRESSURE
DISTRIBUTOR
THERMAL
EXPANSION
VALVE
RECEIVER
RELIEF VALVE
PRESSURE
CONTROL VALVE
HEAD PRESSURE
CHECK VALVE
CHECK VALVE
EVAPORATOR COIL
FIELD PIPING BY OTHERS
INTERCONNECTING
SCHRADER
VALVE BODY
GLASS
OPTIONAL COMPONENTS FOR FLOODED HEAD PRESSURE CONTROL
ELECTRONIC
TEMPERATURE
SENSOR
T
PT
PRESSURE
TRANSDUCER
(OPTIONAL)
HOT GAS
REGULATOR
ASC
ELECTRONIC
Table 3. Pipe connection sizes
Model # Liquid Line (in.)
Discharge Line
(in.)
Condensate
Drain (in.)
CRS-042-W, -G 5/8 5/8 1/2
CRS-084-W, -G 5/8 5/8 1/2

Installation
16 AH-SVX015A-EN
Refrigerant Pipe Sizing
Refrigerant lines for split systems must be sized according to
the piping distance between the evaporator and the
condenser. Each valve, fitting and bend in the refrigerant line
must be considered in this calculation. Pipe sizes are given for
equivalent feet, not linear feet. Do not confuse the
terminologies.
For example, a 7/8 inch standard 90° elbow has an equivalent
length of 1.5 feet; a 7/8 inch branch Tee has an equivalent
length of 3.5 feet. These corrections must be accounted for
when sizing your piping.
Note:
•Refrigerant piping between the CyberRow unit and the
remote condenser must not exceed 150 feet (total
equivalent length). The maximum level drop from the
CyberRow unit to the condenser must not exceed 20
feet.
•Consult ASHRAE standards and refer to the Copeland
applications data guide for more detailed information
regarding refrigerant line traps and line sizing.
Refer to Table 4 for standard equivalent lengths, in feet, of
straight pipe.
Oil traps must be included every 20 feet in the vertical risers
and the refrigerant lines must be sloped ¼ inch for every 10
feet in the horizontal lines to ensure proper oil return to the
compressor. An inverted trap is required on the discharge line
of the remote condenser to help prevent oil and liquid from
flooding back to the compressor.
Remote Air Cooled Condensers
Refer to the Table 5, p. 17 and Table 6, p. 17 below. Systems
utilizing air cooled condensers must not have a refrigerant line
pressure drop over 14 psig across the condenser and the
interconnecting piping to the condenser.
Note: Ensure proper condenser selection to maintain
reasonable sub-cooling temperatures.
Figure 11. DX Refrigerant piping connections
TOP ACCESS PIPING BOTTOM ACCESS PIPING
CONDENSATE PUMP
DISCHARGE- 1/2” FPT
DISCHARGE
LINE LIQUID
LINE
SUCTION LINE
LIQUID LINE
Table 4. Equivalent length (ft.) of straight pipe
OD (In.)
Line Size
Globe
Valve
Angle
Valve
90°
Elbow
45°
Elbow
Tee
Line
Tee
Branch
1/2 9.0 5.0 0.9 0.4 0.6 2.0
5/8 12 6.0 1.0 0.5 0.8 2.5
7/8 15 8.0 1.5 0.7 1.0 3.5
1 1/8 22 12 1.8 0.9 1.5 4.5
1 3/8 28 15 2.4 1.2 1.8 6.0

Installation
AH-SVX015A-EN 17
Vertical runs are based on a total rise of 30 equivalent feet. For
longer rises, individual calculations should be made. Sizes
assume the use of single risers; double rises may be
necessary.
Note: Do not exceed 150 ft maximum Liquid Line length.
If the condenser is installed above the evaporator, the
discharge line should include a p-trap at the lowest point in the
piping. The highest point in the discharge line should be above
the condenser coil and should include an inverted trap to help
prevent oil and liquid from flooding back to the compressor
during off cycles.
Condensate Drain Line
A condensate pump is factory installed. The drain line
connection is typically a 1/2-inch FPT fitting. The installer must
connect a drain line (customer supplied) to the drain fitting to
remove water from the cabinet.
The condensate drain fitting is accessed through the top or
bottom of the cabinet as configured with the water/glycol or
refrigerant piping connections. The drain fitting is accessed
from outside the cabinet on top piped units. The drain fitting is
accessed inside the cabinet behind the front discharge panel
on bottom piped units. An entrance hole for the drain line is
provided in the floor of the fan compartment. See the
installation drawing provided with your unit for the location of
the condensate drain fitting.
Connect the drain line to the fitting and direct the water to an
appropriate place, such as an open building drain with an air
gap, per local and national plumbing codes. After the piping is
installed, seal the gap between the drain line and the cabinet
entrance hole so air will not leak.
Utility Connections
Main Power
The CyberRow product offering is available in single or three
phase variations and a wide range of voltages. It is imperative
that the unit nameplate be examined to determine the
operating voltage, frequency and phase of the system (see
Figure 12, p. 18). The nameplate also provides the full load
amps (FLA), the current the unit will draw under full design
load, the minimum circuit ampacity (MCA) for wire sizing, and
the maximum fuse or HACR (Heating, Air Conditioning,
Refrigeration) breaker size (MAX FUSE/CKT BKR) for circuit
protection. The units nameplate is located inside the cabinet
within the electrical box.
Note: If the nameplate states MAX FUSE/CKT BKR, it is
required to use fuses or a HACR type circuit breaker to
protect the system. Other protection devices are not
allowed based upon the product listing.
Table 5. Recommended discharge line sizes
CRS Model
Number
Equivalent Length Ft.(a)
(a) Equivalent Ft. accounts for the linear pipe length as well as equivalent length
of Valves, Elbows and Tees as shown in the Table 4, p. 16.
50’or less 100’or less 150’or less
042 5/8 5/8 5/8
084 7/8 7/8 7/8
Table 6. Recommended liquid line sizes
CRS Model
Number
Condenser to A/C Unit /
Receiver to Evap. (Equivalent Ft.(a))
(a) Equivalent Ft. accounts for the linear pipe length as well as equivalent length
of Valves, Elbows and Tees as shown in the Table 4, p. 16.
50’or less 100’or less 150’or less
042 1/2 1/2 1/2
084 5/8 5/8 5/8
NOTICE
Coil Fin Damage!
Failure to follow instruction below could cause
corrosion on the coil fins and cause coil fin damage.
Do not use chloride based water conditioning additives
in condensate drain pans.

Installation
18 AH-SVX015A-EN
The unit is provided with terminals for all required field-wiring.
Refer to the electrical drawing supplied with the unit for all
power and control field-wiring. It is important to identify the
options that were purchased with the unit in order to confirm
which field connections are required.
Note: All wiring must conform to local and national electrical
code requirements. Use of copper conductors only is
required. Wiring terminations may become loose
during transit of the equipment; therefore, it is required
to verify that all wiring terminations are secure.
It is important to verify that the main power supply coincides
with the voltage, phase and frequency information specified on
the system nameplate.
The supply voltage measured at the unit must be within ±10%
of the voltage specified on the system nameplate except for
208/230V single-phase units which have a different tolerance
listed below.
A main distribution panel must be provided with a manual
fused disconnect switch or HACR type circuit breaker per local
and national electrical codes for service to the equipment. Do
not mount a customer supplied manual fused disconnect
switch or HACR type circuit breaker to the surface of the unit.
The unit is provided with main power and control pilot holes for
connection of the field-wiring conduit. These pilot holes are
located on the CyberRow unit based on the configuration. The
pilot holes are located in the top of the cabinet or in the floor of
the cabinet.
A label stating MAIN POWER INPUT is placed in close
proximity. See the installation drawing provided with your unit
for pilot hole locations. Terminate the main power wires at the
line side of the service disconnect switch, located within the
electric box. A separate equipment ground lug is provided
within the electrical box for termination of the earth ground
wire.
Single-Phase Units 208/230V
The supply voltage for units that are designed for 208V
operation must have a tolerance within -5% and +10%. If the
measured supply voltage is 230V, the unit can operate with a
tolerance of ±5% if the following change is made. The control
transformers within the system must have the primary wire
connected to its respective 240V tap instead of the 208V tap.
Figure 12. Sample nameplate
Sales Order Number:
Model Number: TR-
Item Number:
Serial Number:
Electrical Data:
SCCR: kA RMS Symmetrical
Voltage: Phase: Hz:
No. Wires: (Including Ground)
FLA: MCA:
Max Fuse/Ckt. Bkr (HACR type per NEC): A
Heater: kW (Nominal)
Humidifier: kW (Nominal)
Evaporator Motor (1): HP: FLA:
Evaporator Motor (2): HP: FLA:
Evaporator Motor (3): HP: FLA:
Evaporator Motor (4): HP: FLA:
Condenser Motor (1): HP: FLA:
Condenser Motor (2): HP: FLA:
Condensate Pump: HP: FLA:
Compressor (1): RLA: LRA:
Compressor (2): RLA: LRA:
Refrigerant Type:
Charge: Circuit #1: lb oz
Charge: Circuit #2: lb oz
High Side Design Pressure: psig
Low Side Design Pressure: psig
Max. Output Air Temperature: ºF
Blower/Fan Ext. Static Pressure: in. w.g.
Max. Inlet Hot Water Temp.: ºF
Hot Water or Steam Pressure: psig
Minimum Installation Clearance: 0.0 in.
Remote Condenser Type:
Suitable for Indoor: Outdoor: Use
Date of Manufacture:
Q.A. Acceptance:
SATS
1
Manufactured by
STULZ Air Technology Systems, Inc.
Frederick, Maryland, USA
WARNING
Hazardous Service Procedures!
Failure to follow all precautions in this manual and on
the tags, stickers, and labels could result in death or
serious injury.
Technicians, in order to protect themselves from
potential electrical, mechanical, and chemical hazards,
MUST follow precautions in this manual and on the
tags, stickers, and labels, as well as the following
instructions: Unless specified otherwise, disconnect all
electrical power including remote disconnect and
discharge all energy storing devices such as capacitors
before servicing. Follow proper lockout/ tagout
procedures to ensure the power can not be
inadvertently energized. When necessary to work with
live electrical components, have a qualified licensed
electrician or other individual who has been trained in
handling live electrical components perform these
tasks.
CAUTION
Prior to unit operation, an adequate unit-to-earth
ground must be connected to the unit.

Installation
AH-SVX015A-EN 19
Three-Phase Units
Three-phase units are designed to have the L1, L2 and L3
supply wires connected to corresponding L1, L2 and L3 line
terminals of the non-fused service switch. The unit will operate
correctly if the supply wires are connected in this manner.
Optional Equipment
Additional control wires may be required depending on the
options that were purchased with your unit. Optional sensors
are to be connected directly to the control terminal board in the
CyberRow electric box. You may route the wires through the
top or bottom of the cabinet as preferred using the available
knock-outs. Refer to the electrical drawing supplied with your
unit to determine the total number of interconnecting
conductors required for your system.
Note: All wiring must be provided in accordance with local
and national electrical code requirements for Class 2
circuits.
It is important to note that the control transformer(s) supplied
with the equipment have been sized and selected based upon
the expected loads for each system.
Remote Water Detector
Refer to “Remote Water Detectors,” p. 12. Each remote water
detector used will require two conductors to be wired to the
control terminal block within the unit electrical box. The wire
insulation must be rated at 600V.
Remote Temperature/Humidity Sensor
Refer to “Remote Temperature/Humidity Sensor,” p. 12. The
remote temperature/ humidity sensor is equipped with a
shielded cable. The shield is to be terminated at the unit
electric box. The electric box includes a control terminal block
with box type lugs for wire connections.
Remote On/Off
The unit is provided with a means to remotely turn off the air
conditioning system. A normally closed switch is required for
this purpose (customer furnished). Two conductors from the
normally closed switch must be connected to the control
terminal block located within the unit electric box. Refer to the
supplied electrical schematic for the specific power rating of
the switch and for wiring details.
See “Remote On/Off,” p. 36 for additional information on the
remote on/off feature.
Outdoor Equipment
The following sections detail field power wiring required for a
typical system. Additional conductors may be required
depending on the options purchased with the equipment.
Refer to the electrical drawing supplied with your unit for the
appropriate field wiring terminations required specifically for
your system.
Water Cooled Systems (CRS-W Models)
Systems equipped with an internal water cooled condenser do
not require field wiring to external components other than to
optional sensors as selected (e.g. Flow Sensors, Remote
Supply Air T/H sensor, Air Pressure, Customer Alarm Inputs).
Glycol Cooled Systems (CRS-G Models)
Glycol-cooled systems equipped with a pump package require
field wiring between the A/C unit and the pump package (see
Figure 13). The installer must wire two control conductors from
the terminal board within the A/C unit, to the pump package
electrical box. Refer to the electrical drawings supplied with
your unit for the number of field wires required and for the
appropriate wire terminations required for your system.
NOTICE
Compressor Damage!
Improper wire connections will result in the reverse
rotation of the fans/blower motors and compressor and
this may eventually result in damage to the
compressor.
To correct this problem, exchange any two of the
incoming main power wires at the main power service
disconnect switch. Do NOT rewire the unit’s individual
components.
NOTICE
Equipment Damage!
Connecting additional loads to the factory supplied
control transformer(s) may result in overloading of the
transformer(s).
Do not connect additional loads to the system control
transformers.

Installation
20 AH-SVX015A-EN
Remote Condenser (CRS-A Models)
For systems equipped with a remote condenser, the installer
must provide main power wiring to the main power distribution
block located within the remote condenser electric box. A
separate equipment ground lug is provided within the electrical
box for termination of the earth ground wire. Refer to the
electrical drawing supplied with your unit and the wiring
diagram supplied with the condenser (typically located in the
condenser electric box).
Control wires are not required between the remote condenser
and the A/C system (see Figure 14, p. 21). As an option,
control wiring may be installed between the A/C system and
the condenser for the system controller to enable condenser
operation only when the compressor is running. You must
remove the jumper from the remote condenser terminal board
(see the condenser wiring diagram). Wire 24 VAC control
conductors from the terminal board within the A/C unit to the
remote condenser terminal board. If control wires are not
installed (and the jumper remains in place), the condenser is
always enabled and will turn on and off based on the
condensers pressure control settings. Refer to the electrical
drawing for the correct number of field wires required and for
the appropriate wire terminations required for your system.
Figure 13. Interconnecting field wiring glycol systems
PHANTOM WIRES ( ) NOT APPLICABLE FOR SINGLE PHASE POWER SUPPLIES.NOTE:
(TO BE INSTALLED IN ACCORDANCE
(GLYCOL UNITS ONLY)
ELECTRIC
24VAC
PUMP PACKAGE
BOX
SEE NOTE 1
WITH NFPA 70, N.E.C.)
INTERCONNECTING FIELD WIRING
MAIN POWER SUPPLY
208-460V/1PH-3PH/60Hz
DRYCOOLER
L3
L1
L2
WITH NFPA 70, N.E.C.)
INTERCONNECTING FIELD WIRING
(TO BE INSTALLED IN ACCORDANCE
MAIN POWER SUPPLY
208-460V/1PH-3PH/60Hz
L3
L1
L2
SEE NOTE 1