Stulz CyberWall CAH User manual

CyberWall™
Model CAHXXXXXXXX
664 kW Chilled Water System
Floor Mounted, 3Phase/460Vac/60 Hz
Installation, Operation and Maintenance Manual

11.8.22 © STULZ USA – all rights reserved
CYBERWALL™ INSTALLATION, OPERATION AND MAINTENANCE MANUAL
ABOUT STULZ
Since it was founded in 1947, the STULZ company has
evolved into one of the world’s leading system suppliers of
computer room air conditioners and air handlers.
STULZ has seen continual international expansion of its
precision cooling business, specialising in temperature and
humidity control for data centers and telecommunications
installations.
STULZ has ten production plants (2 in Germany, 2 in
the USA, Italy, Great Britain, Spain, 2 in China, Brazil and
India) and twenty subsidiaries (in Germany, USA, France,
Italy, Great Britain, Belgium, Brazil, the Netherlands, New
Zealand, Mexico, Austria, Poland, Spain, Singapore, China,
India, Indonesia, South Africa, Sweden, and Australia).
STULZ works with sales and service partners in over 140
other countries, and therefore boasts an international
network of cooling specialists.

© STULZ USA – all rights reserved 11.8.22
CYBERWALL™ INSTALLATION, OPERATION AND MAINTENANCE MANUAL
The benchmark of flexibility and
energy efficiency
This document contains information protected by copyright. All rights are reserved. The owner of the
equipment for which this manual is written may photocopy the contents ofthis manual for internal use
only. No part of this document may be photocopied, reproduced, ortranslated into another language
for use by anyone other than the owner ofthe equipment for which this manual is written without the
prior written consent of STULZ Air Technology Systems, Inc.
This document contains confidential and proprietary information of STULZ Air Technology Systems,
Inc. Distributing or photocopying this document for external distribution is in direct violation of U.S.
copyright laws and is strictly prohibited without the express written consent of STULZ.
Unpublished rights reserved underthe copyright laws of the United States and of other countries.
Other brands and trade names are trademarks of their respective owners.
Copyright 2022 by STULZ Air Technology Systems, Inc.
Printed in the United States ofAmerica.
All rights reserved.
STULZ Air Technology Systems, Inc.
1572 Tilco Drive
Frederick, MD 21704, USA
www.stulz-usa.com
Forfurther information concerning our
products and services visit ourwebsite :
www.stulz-usa.com

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CYBERWALL™ INSTALLATION, OPERATION AND MAINTENANCE MANUAL
Contents
Nomenclature..................................................................................................................................................5
Introduction .....................................................................................................................................................6
Installation.....................................................................................................................................................12
Start-Up/Commissioning .....................................................................................................................26
Maintenance .................................................................................................................................................27
Product Support.........................................................................................................................................34
Appendix A - Checklists .........................................................................................................................36

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CYBERWALL™ INSTALLATION, OPERATION AND MAINTENANCE MANUAL
CAH-XXXX-XXXX
CAH Capacity
(kW)
Air Flow
(CFM) Primary Cooling Secondary Cooling Air Pattern Piping Connections
CyberWall 0664 045K
060K C = Chilled Water 0 = None H = Horizontal L = Left Hand
Example:
664 kW capacity, 45,000 CFM airflow, chilled water coil, horizontal air pattern: CAH0664045KC0HL
Nomenclature

611.8.22 © STULZ USA – all rights reserved
CYBERWALL™ INSTALLATION, OPERATION AND MAINTENANCE MANUAL
Product Description
The STULZ CAHXXXXXXXX CyberWall™ unit is composed of two modules that can be field assembled
to facilitate moving the unit through tight spaces. The unit has six fans that provide a horizontal airflow, an
external chilled water (CW) source and a CW coil through which cold fluid is circulated. The fans are available
in two types - electronically commutated (EC) and induction AC.
Upon demand for cooling, a microprocessor controller modulates a CWvalve to open proportionately to
cooling demand and adjusts fan speed to meet a user-defined temperature setpoint.
Heat from the surrounding air is transferred through the finned tubing of the coils into the chilled fluid and the
fluid is recirculated back to its source.
NOTE
The CyberWall™ is strictlyfor non-residential use.
The unit has a factory-mounted main power disconnect. The disconnect is located inside the unit. Power
is disconnected/connected using a handle that extends through the door. It provides a lock-out/tag-out
tab for use when the unit is powered-offfor maintenance. Units with dual power input will have two power
disconnect handles.
The disconnect switch electrically isolates the unit beyond the disconnect switch power input connectors.
The system incorporates state of the art component protection with the use of motor starter protectors. An E²
pluS microprocessor controller and graphic terminal with LCD display is standard with CyberWall™ systems.
NOTE
A Warranty Registration and Start-Up Checklist is provided with the unit data package. Complete it
during start-up and return it to STULZ. This checklist should be used as a guideline for items that need to
be confirmed during start-up.
Safety
NOTE, CAUTION and WARNING statements are used in this manual to draw attention to important
operational and safety information.
A bold text NOTE marks an important detail.
A bold text CAUTION marks information important to protecting your equipment and its performance. Be
especially careful to read and follow all cautions that apply to your application.
A bold text WARNING marks safety information important to protecting you and others from harm. Pay very
lose attention to all warnings that apply to your application.
INTRODUCTION

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CYBERWALL™ INSTALLATION, OPERATION AND MAINTENANCE MANUAL
An Exclamation — — symbol in a WARNING or CAUTION statement indicates a general safety alert. A
lightning bolt — — in a WARNING safety statement indicates an electrical shock hazard.
Safety Summary
Prior to performing any installation, operation, maintenance or troubleshooting procedure, read and
understand all instructions, recommendations and guidelines contained within this manual. Certain
maintenance or cleaning procedures may call for the use and handling of chemicals, solvents, or cleansers.
Always refer to the manufacturer’s Safety Data Sheet (SDS) prior to using these materials. Clean parts in a
well-ventilated area. Avoid inhalation of solvent fumes and prolonged exposure of skin to cleaning solvents.
Wash exposed skin thoroughly after contact with solvents.
The following warnings and cautions are applicable to the equipment and operations documented in this
manual.
WARNING
All personnel working on or near equipment should be familiar with hazards associated with electrical
maintenance. Safety placards/stickers have been placed on the unit to call attention to all personal and
equipment damage hazard areas. Never work on electrical equipment unless another person who is
familiar with the operation and hazards ofthe equipment and competent to administer first aid is nearby.
WARNING
This equipment should be serviced and repaired by a journeyman or a qualified refrigeration technician
only.
WARNING
To prevent personal injury, stay clear of rotating components, as automatic controls may start them
unexpectedly. Turn off power to the unit unless you are performing tests that require power. With power
and controls energized, the unit could begin operating at any time.
WARNING
When working on electrical equipment, remove all jewelry, watches, rings, etc.
WARNING
Hazardous voltage will still be present inside the electric box at the motor starter protectors and
circuit breakers, even with the unit turned off at the microprocessor controller. To isolate the unit for
maintenance, turn off power at the main power disconnect switch (see Figure 4 on page 11).
WARNING
Always disconnect the main power supplyto the equipment at the main power disconnect switch before
beginning work on the equipment. A lock-out tag-out procedure should be followed to ensure that power
is not inadvertently reconnected.
WARNING
Do not use chloride based water conditioning additives in the condensate drain pans. This will cause
corrosion to occur on the coil fins.

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CYBERWALL™ INSTALLATION, OPERATION AND MAINTENANCE MANUAL
WARNING
Never operate the unit with any cover, guard, screen panel, etc., removed unless the instructions
specifically state otherwise, and then do so with extreme caution to avoid personal injury.
CAUTION
If a lifting device is used to move a unit, ensure it is capable of supporting the weight ofthe unit.
CAUTION
Do not use cleaning solvents near open flame or excessive heat. Wear eye protection when blowing
solvent from parts. The pressure-wash should not exceed 30 psig. Solvent solutions should be disposed
of in accordance with local and state regulatory statutes.
CAUTION
After the customer furnished supply and return piping is assembled, the piping system must be
thoroughly cleaned prior to connecting it to the unit. Failure to do so will result in equipment problems.
CAUTION
After the supply and return piping is connected to the unit, the entire system must be flushed prior to
beginning operation.
CAUTION
When installing and filling the water/glycol loop, all air must be bled from the piping system.
CAUTION
Once in service, a CyberWall™ unit should not be drained and taken out of service for an extended period
of time. Formicary corrosion can occur.
CAUTION
When the air conditioner is in the cooling mode, the return air-intake and discharge (supply) must be free
of obstructions. Ensure panels are secure and latched into position.
For optimal performance and to ensure continuous operation, only use STULZ spare parts. Product Support
provides spare and replacement parts by fax, phone and email. Referto “Product Support” on page 34 for
guidance on contacting STULZ support.
General Design
The CyberWall™ unit is housed in a steel frame cabinet and is rated for indoor use. The cabinet frame
members and exterior panels are coated with a durable powder coat finish to protect against corrosion.
The system is designed to be located adjacent to or inside the space to be conditioned. It is mounted on an
optional floor stand, which is in turn secured to the floor.
Hinged access doors are provided for access to major serviceable components. Primary operator control is
through the Graphical Terminal mounted on the controller box access door. Other electrical controls are in the
main electric box. The installation drawing provided with your unit for the cabinet layout, unit dimensions, unit
weight, location of access doors and utility interfaces.

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CYBERWALL™ INSTALLATION, OPERATION AND MAINTENANCE MANUAL
Microprocessor Controller
An E² pluS microprocessor controller is supplied standard with CyberWall™ systems (see Figure 1).
Controller features include full alarm system; input/output monitoring status; full integrated control of
cooling; multi-A/C unit control and remote communication with building management systems. The
controller’s Graphic Terminal is mounted on the main electrical box door. The displayfeatures a large color
display to clearly show information. Information is color coded so that at a glance, the unit’s status is can be
determined (e.g. In Alarm or In Override mode).
Figure 1. E2 pluS Microprocessor Controller
Mechanical Interfaces and Features
Figure 2 shows the major mechanical and control interfaces on the unit.
CHILLED WATER CONNECTIONS
POWER DISCONNECT
SWITCHES
GRAPHIC TERMINAL
AUXILIARY
ELECTRICAL
BOX DOOR
MAIN
ELECTRICAL
BOX DOOR
LIFTING EYES (4 PL)
Figure 2. Unit Cabinet Features

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CYBERWALL™ INSTALLATION, OPERATION AND MAINTENANCE MANUAL
Electric Box Access
Electrical components are divided between a main electric box housed behind a hinged access door in the
bottom module, and an auxiliary electric box housed behind a hinged access door in the top module, as
shown in Figure 2. Each door is secured by three turnlock fasteners that are rotated to latch/unlatch the door.
The main electric box contains the main power service disconnect switches that turn powerto the unit on and
off (see Figure 2).
Fans
The unit is equipped with six high efficiency fans. All fans are direct-drive backward incline impeller designs.
There are four options forthe fans:
• EC Titanium, 5 HP AC motor with incorporated VFD for speed control
• EC Titanium, 7.5 HP AC motor with incorporated VFD for speed control
• AC Induction, 5 HP AC motorwith a single VFD for control
• AC Induction, 7.5 HP AC motorwith a single VFD for control
FRONT VIEW WITH FILTER RACKS REMOVED
Figure 3. Fan Configuration
Chilled Water Connections
Water coil connections are made through two 2½ inch pipes located at the top left corner of the upper
module (when viewed from the front - see “Figure 2. Unit Cabinet Features” on page 9). Connections can be
made using copper sweat, rolled groove, or copper female-threaded pipes.
Temperature/Humidity Sensors
A temperature/humidity (T/H) sensor is factory mounted on the return side of the unit. The T/H sensor
monitors the return air conditions and provides input signal(s) to the system controller to manage the
operation ofthe air conditioning (A/C) unit consistent with the set points entered in the controller.

11© STULZ USA – all rights reserved 11.8.22
CYBERWALL™ INSTALLATION, OPERATION AND MAINTENANCE MANUAL
Optional supply air temperature sensors are available. These sensors are unit mounted, one in each module.
Refer to the electrical drawing supplied with your unit for details specific to your system.
Control Valves
The standard configuration ofthe unit is controlled via modulating ball valves. A two-wayfull modulating
pressure independent characterized control valve (PICV) option is available. The PICV option uses a control
signal of 210 VDC for modulating control of the full rated flow. Valve position feedback is included from
the valve actuatorto the unit controllerfor monitoring valve position. A quantity of two 2-way chilled water
modulating valves are provided, one control valve for each CAH module coil section.
FRONT VIEW WITH FLOORSTAND
WATER
SUPPLY
WATER
RETURN
REAR VIEW WITH FLOORSTAND
AUXILIARY
ELECTRONICS
BOX DOOR
MAIN
ELECTRONICS
BOX DOOR
GRAPHIC
TERMINAL
REMOVABLE
DISCHARGE
GRILLE
(6 PL)
POWER
DISCONNECT
SWITCHES
Figure 4. Unit Cabinet Features

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CYBERWALL™ INSTALLATION, OPERATION AND MAINTENANCE MANUAL
INSTALLATION
Receiving the Equipment
Your CyberWall™ unit has been inspected and tested prior to shipment. To ensure it is received in factory
condition, immediately inspect the unit for damage incurred during shipment. If any is found, report it to
the carrier immediately. Any obvious shipping damage must be noted on the freight carrier’s delivery forms
before signing for the equipment. Freight claims must be filed through the freight carrier.
Generally, all equipment ships FOB Factory. In the event of damage during shipment, STULZ can assist in the
claim filing process with the freight company. Referto section 5.0 Product Support for instructions.
Carefully remove the shipping cover. Remove any loose parts and check the equipment against the packing
list to verify the shipment is complete. Report all discrepancies to the appropriate authority. Inspect the
interior of the unit for any signs of transit-incurred damage. If there is any damage, notify STULZ Product
Support. Do not attempt any repairs.
A data package has been sent with your unit. It contains this manual, system drawings, applicable Safety Data
Sheets, warranty registration form and other component manuals and applicable instructions based on the
configuration and options included with your unit. The data package has been placed in your unit inside a
clear plastic bag. These documents should be retained with the unit for future reference.
NOTE
Items that have been shipped loose, 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.
Storage
Indoor Storage
Indoor air handlers and field-installed accessories must be protected from the elements. Outdoor storage is
not recommended for units that will be installed indoors. A controlled indoor environment is recommended
for proper storage. The indoor storage area conditions should be maintained between 41°F to 86°F (5°C
to 30°C) and a non-condensing environment, unless specified otherwise. If the unit is to be stored after
unpacking from the original factory packaging, then it should be repackaged using equivalent means and
material. Ensure the follow to prevent damage:
• Do not remove the factory cover. Ensure cover is complete and was not penetrated during shipping. Repair
cover as needed. The shrink-wrapped packaging used has a corrosion inhibitor layer integrated.
• Ifthe factory shrink-wrap cover has been removed, coverthe unit securelywith a canvas tarp. Plastic tarps
can cause condensation to form in and on the equipment, which could result in corrosion damage orwet
storage stains.
• Place the unit on a dry surface or raised off the ground to assure adequate air circulation beneath the unit
and to assure no portion of the unit will contact standing water at any time.
• Do not stack units.

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CYBERWALL™ INSTALLATION, OPERATION AND MAINTENANCE MANUAL
• Do not pile other material on the unit.
• Periodically, inspect stored units.
Outdoor Storage
Only outdoor air handlers may be stored outdoors, unless otherwise noted. Outdoor air handlers require no
special protection for storage prior to install if the factory cover remains intact.
Long-Term Storage
For longer periods of storage, allow proper clearance around the unit to perform periodic inspections and
maintenance on the equipment. Everytwo weeks while the unit is in storage, rotate the fan and motor shaft(s)
approximately 30 revolutions by hand. Check forfree rotation.
Site Preparation
Conditioned Space
Certain steps may be taken to minimize the effects ofthe environment surrounding the conditioned space.
This is especially true for critical/precision room preparation (computer rooms/labs) requiring close tolerance
control of temperature and, optionally, 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 ofthe space, which
was the basis for the system selected. The following chart is a recommended minimum R-value (thermal
resistance) to ensure optimum equipment operation.
STRUCTURE RVALUE
CEILING R38
WALL R21
FLOOR R19
DOOR R5
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 may add to the cooling load), while still maintaining
the requirement of the IndoorAir Quality (IAQ) standard. Lack of attention to these factors can cause erratic
operation, unstable room control and excessive maintenance costs.
Service Clearances
The CyberWall™ is designed for easy service access. It has doors for accessing the main electric box (bottom
module) and the auxiliary electrical box (top module). No permanent obstructions should be placed in front of
the fan grilles, and the minimum clearances shown in Figure 5 on page 14 should be maintained for the doors
and to permit maintenance from the supply side ofthe cabinet.

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CYBERWALL™ INSTALLATION, OPERATION AND MAINTENANCE MANUAL
NOTE
Working clearance requirements need to be established prior to mounting the unit. Referto local and
national electrical codes.
NOTE
These units use welded frame construction for unit rigidity. The system is designed to be installed either
on the floor or an optional stand. Ensure the curb is sealed to prevent air leakage. See the detail drawing
provided with the unit for interface dimensions. These units are designed to condition only one room.
NOTE
Working clearance requirements need to be established prior to mounting the unit. Referto local and
national electrical codes.
TOP VIEW
FRONT
120.0 in
[2048 mm]
36.0 in
[914 mm]
18.3 in
[465 mm]
Figure 5. Maintenance Clearance Recommendations
When determining the installation location, consider how you’ll route the piping and wiring to the cabinet. The
installation drawing furnished with your unit shows the recommended wiring entry locations. Ensure access is
available for routing the piping and wiring.
CAUTION
The A/C unit must be installed in a space that will be air conditioned.
Lifting and Rigging
CAUTION
Ensure crane is rated to lift the unit plus any additional lifting accessories. Each module (top and bottom)
weighs approximately 3,700 lbs (1,678 kg) dry. Utilize spreader bars that exceed the cabinet width
to avoid crushing the sides or damaging components mounted to the sides. When lifting a module, a
spreader bar must be used to prevent damage (see Figure 6). Attaching chains directly to the lifting lugs
will result in damage.
CyberWall™ units are designed to be kept in a vertical position. Move the unit with a suitable device such as
a pallet jack or roller bar and dollies. The unit is shipped on a skid to facilitate moving prior to installation. The
unit should always be stored indoors in a dry location prior to installation.

15© STULZ USA – all rights reserved 11.8.22
CYBERWALL™ INSTALLATION, OPERATION AND MAINTENANCE MANUAL
CAUTION
When moving a module, it must be kept level and in the vertical position when lifting to prevent damage.
Figure 6. Lifting Detail
Field Assembly
CyberWall™ modules ship as separate shipping sections due to shipping and handling constraints. A field
assembly drawing is provided in the unit documentation pack if field assembly is required. Failure to explicitly
followthe field assembly drawing could cause damage or premature failure to the unit and void the unit’s
warranty. Installation must be performed by a qualified technicians.
Mounting/Placement
Slab Mount Installations
The unit is designed to be installed directly on a concrete floor or “housekeeping” pad. When determining
the installation location, consider how to route the piping and wiring to and from the cabinet. The installation
drawing furnished with your unit shows the piping and wiring locations. Ensure access is available for routing
the piping and wiring.

16
11.8.22 © STULZ USA – all rights reserved
CYBERWALL™ INSTALLATION, OPERATION AND MAINTENANCE MANUAL
NOTE
To ensure proper operation, additional height may be required to obtain proper drain trap height or drain
piping slope.
The floor must be flat and level. Where surface irregularities could cause equipment distortion, utilize shims
to ensure base of the unit is uniformly supported and straight. Uneven or distorted sections may cause
interference or binding of doors and panels, the overall unit to appear out of square, and improper draining of
drain pans.
Holes are provided in the bottom rails of the frame to bolt the unit to the floor when it is in its final position. It
is the installer’s responsibility to secure the unit to the unit pad in accordance with all applicable building and
earthquake codes. The method of anchoring is only specified if seismic requirements are ordered. Failure to
follow the seismic installation instructions would void the warranty.
Floor Stand Installations
The system is designed to be installed on a floor stand, which is directly attached to a concrete floor as
described in “Slab Mount Installations” on page 15. For units with a condensation pump, a 3 inch high stand
is used. For gravity condensate drains an optional 6 inch stand is available. Holes are provided in the
bottom rails of the frame to optionally bolt the unit to the floor stand when it is in its final position. An
optional rear air-block plate is available to ship loose from the stand, intended for field installation on rear
side of stand to prevent gallery air from penetrating into the data hall, in lieu of field provided curb or wall.
Please refer to the stand assembly drawing provided with your unit for instructions to install shipped loose
feet and (optional) rear air-block plate.
Assembling Top and Bottom Modules
1. Move the floorstand into place.
2. Level and anchor the floor stand as required.
3. For the stand with optional ship loose rear air-block plate, adjust height of plate to level as required.
Note: It is recommended to use a rubber gasket or sealant to seal the bottom of air-block plate to
prevent water and air leakage.
4. Lift the bottom module into place on the floor stand. Refer to “Lifting and Rigging” on page 14 for
important information on lifting the unit.
5. Secure the bottom module to the floor stand using the supplied M8 serrated flange bolts (PN
193741).
6. For gravity condensate drains only, perform the following steps:
a. Refer to Figure 7. Install the supplied 60-inch copper condensate tube, pipe clamps (PN 207756), and shims
(PN 207780) on the floor stand.
b. Lower the bottom module onto the floor stand and secure using M8 1.25 X 25MM serrated flange bolts (10
places).
c. Remove drain access panels and attach
d. Insert grommet (PN GROMRU6LX) on the P-trap (PN 207790).
e.
f.
Connect the P-trap to the internal and external condensate drain lines using flexible couplings
(PN194315).
Install two drain cover plates (PN 207779) to floor plate using #14 X 1 hex head self-tapping screws
(PN112914).

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CYBERWALL™ INSTALLATION, OPERATION AND MAINTENANCE MANUAL
Secure Top and Bottom Modules
Attach the top and bottom modules. Modules are secured together using M8 1.25 X 16MM HHCS
serrated flange bolts (10 places).
Connect Top and Bottom Water Lines
Refer to Figure 8.
1. Open the upper module electrical box door and remove rear access panel.
2. Remove the fan access panel next to the upper electrical box.
3. Remove the water coupling clamps from the return and supply pipes in the top module and slide the
rubber gasket up the pipe away from the end of the pipe. Use an EPDM-compatible pipe lubricant
(Shurjoint pipe lubricant or comparable) as needed to slide the gasket over the pipe.
4. For both the supply and return water lines:
a. Slide the rubber gasket overthe pipe joint so gasket does not overlap the indent in the ends of the
pipes (see Figure 8). Use an EPDM-compatible pipe lubricant (Shurjoint pipe lubricant or comparable)
as needed to slide the gasket over the pipes.
CAUTION
Take care not to pinch the gasket between the coupling halves. Doing so can result in leaks.
b. Assemble clamp halves over the gasket so the lips ofthe clamp engage the indent in the ends of the
pipes. Tighten nuts alternately and equally until bolt pads meet and make metal-to-metal contact,
then tighten nuts by another one quarter to one half turn to make sure the bolts and nuts are snug and
secure. A torque wrench is not required.
c. Install foam insulation as shown using elastomeric foam adhesive.

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CYBERWALL™ INSTALLATION, OPERATION AND MAINTENANCE MANUAL
AA
H
H
GG
REMOVE ACCESS
PANEL
P-TRAP
CONDENSATE
DRAIN
SECTION A-A
BOTTOM MODULE
M8-1.25 X 25MM
HHCS SERRATED
FLANGE BOLTS
(10 PL)
60-INCH
COPPER TUBE
SEE SECTION H-H
AIRBLOCK
FLEXIBLE
COUPLING
PIPE CLAMP (207756)
(W/ NO SHIMS)
FLEXIBLE
COUPLING
DRAIN ACCESS
PANELS
GROMMET
SECTION G-G
P-TRAP
SECTION H-H
PIPE CLAMP (207756)
(W/3X SHIMS)
Figure 7. Attaching Condensate Drain

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CYBERWALL™ INSTALLATION, OPERATION AND MAINTENANCE MANUAL
Figure 8. Connecting Internal Water Lines
FAN ACCESS
PANEL REMOVED
ROLL GROOVE
COUPLING
(2 PL)
COPPER
TUBING
COPPER
TUBING
ROLL GROOVE
COUPLING
FOAM
INSULATION
FOAM
INSULATION
APPLY ADHESIVE
TO SEAMS. BUTT
END OF INSULATION
AGAINST COUPLING.
FOAM TUBING LENGTH
AS REQUIRED.
FOAM
INSULATION
FOAM
INSULATION
FOAM
INSULATION

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CYBERWALL™ INSTALLATION, OPERATION AND MAINTENANCE MANUAL
Inter-Module Cable Connections
Cable harnesses connect between the top and bottom modules for all power and control signal connections.
When shipped, the electrical cables are coiled inside the bottom electrical enclosure. Perform the following
steps to connect the modules. After assembly, feed the harnesses from the bottom module electrical box
(Figure 9) into bottom of the auxiliary electric box, and make connections to the appropriate distribution and
terminal blocks in accordance with the unit wiring diagram.
FEED CABLES
THROUGH
PORTS TO
TOP UNIT
BOTTOM MODULE
Figure 9. Inter-Module Cable Routing
External Connections
Chilled Water Piping Connections
Pipe connections for the chilled water supply and return can be made using rolled groove couplings,
copper sweat, or threaded copper connections. See the installation drawing provided with your unit for pipe
connection sizes. Field piping is not necessarily the same size as the unit’s 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.
CAUTION
When installing and filling chilled water loops, all air must be bled from the piping system.
NOTE
A 20 mesh stainless steel strainer (865 micron opening size) is recommended to be installed in the
supply line. The strainer screen should be cleaned periodically.
NOTE
If newly installed chilled water supply and return piping is used, clean the piping system prior to
connecting it to the unit. If solvents/cleaning solutions are used, ensure they are completely flushed from
the piping before connecting it. Failure to do so could result in equipment problems.
NOTE
Chilled water lines should be insulated to prevent condensation from forming on the pipes.