Stulz CyberPack ASC-12C Installation and operation manual

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Packaged Rooftop Air Conditioner
ackaged Rooftop Air Conditioner
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Outdoor Cooling
®
Engineering Manual
Air Conditioner
EM
STULZ CyberPack Systems
Packaged Rooftop Air Conditioner
42 - 105 kW
Self Contained Precision Air Conditioner Utilizing EC Fan Technology

2®
CyberPack
Our Mission:
Driving innovation in our industry, providing highest quality environmental control products,
superior technology, customer solutions and exceptional customer service while being a socially
and environmentally responsible and ethical company.
STULZ is dedicated to providing innovative solutions for critical temperature and humidity control
needs. STULZ designs and manufactures specialized, energy efficient, environmental control
equipment. STULZ serves a diverse marketplace; our customers represent a variety of industries
including telecommunications, information technology, medical, financial, educational, industrial
process and government. Our world-class “island” manufacturing processes take place in a
modern, 218,000 ft2facility located in Frederick, MD USA. STULZ combines a global network of sales and service companies
with an extensive factory engineering staff and highly flexible manufacturing resources dedicated to providing world-class quality,
innovation and customer service.
This commitment to excellence, along with fast lead times and outstanding customer service, make STULZ the perfect choice for
all your environmental control needs.
Solutions that help you reach your goals.
Ultrasonic Humidifiers
• Duct, AHU, Wall Mounted & Stand-alone
• Clean, Energy Efficient
• Evaporative Cooling
Precision Air Conditioning
• Ceiling, Row & Floor Mounted from 1-200 tons
• Air, Water, Glycol, Chilled Water
• Free Cooling
• Alternate Water Source
ISO-9001 Quality Registered
STULZ is committed to satisfying customer expectations by meeting and exceeding requirements. Our Quality Policy ensures
that every Employee is committed to Customer Satisfaction, Teamwork and utilizing Continuous Process Improvement methods
in order to deliver an exceptional product. We continually measure our performance to improve the effectiveness of our quality
management system.
STULZ CyberPack packaged rooftop air conditioning units provide precision temperature and humidity control for mission
critical areas where continuous 24 hours per day, 365 days per year operation is required. Designed for continuous operation,
CyberPack systems are self contained, direct expansion cooling units. The units are designed with a range of options to handle
both precision and comfort cooling applications.
Typical applications include:
INDUSTRIES:
Internet / Web Hosting
Telecommunications
Financial / Banking
Insurance
Airlines / Mass Transit
Legal Services
Entertainment
Government
Colleges / Universities
APPLICATIONS:
Data Centers
Computer / LAN Rooms
Telecommunications Rooms
Co-location Centers
ISP (Internet Service Providers)
ASP (Applications Service Providers)
STULZ

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Packaged Rooftop Air Conditioner
Table of Contents
Table of Contents ................................................................................. i
Model Nomenclature........................................................................... ii
Product Design Features and Options
Product Design Features and Options ...............................................1-2
Product Features Index ........................................................................ 3
Performance and Electrical Data
Technical Specifications & Electrical Data (FLA/MCA/MFS) .................... 4
Dimensional Data / Installation Drawings
ASC-12C/13C/15C-DX ........................................................................ 5
ASC-20A/25A/30A-DX ........................................................................ 6
Guide Specifications
Product Guide Specifications ..........................................................7-10
Table of Contents
CyberPack Air Conditioner Systems
CONDENSER FANS
COMPRESSORS
RECEIVERS
EVAPORATOR
FAN(S)
EVAPORATOR
COILS
GALVANNEALED
STEEL BASE
FILTERS
FRESH AIR
INLET
CONDENSATE PAN
CyberPack Interior View
(Model ASC-30A-DX shown)

ii ®
CyberPack
ASC = Packaged DX System Primary Cooling Method
DX = Direct Expansion
Cabinet Size
A = Nominal 20 - 30 tons
C = Nominal 12 - 15 tons
ASC - 15C - DX
Nominal Capacity
12 = Nominal 12 tons
13 = Nominal 13 tons
15 = Nominal 15 tons
20 = Nominal 20 tons
25 = Nominal 25 tons
30 = Nominal 30 tons
Model Nomenclature
CyberPack
(Model ASC-30A-DX shown)
STULZ CyberPack systems are designed to be the
solution to your precision air conditioning requirements.
CyberPack systems are available with up to 105 kW
cooling capacity with up to 12,000 CFM nominal
airflow. CyberPack direct expansion refrigerant systems
utilize multiple independent refrigerant circuits, each
packaged with an air-cooled condensing unit as the
primary cooling source. CyberPack units are also
available with optional air-side economizer cooling.
STULZ E2series controller stages refrigerant circuits
and/or dampers and manages fan speed, as needed,
to precisely control temperature and humidity with
the lowest energy usage. Efficiently designed for
convenient service access, CyberPack self-contained
systems can be easily installed on the roof of the space
to be conditioned.
Louvered access
panels are removable
for easy access
to refrigeration
components.

1
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Packaged Rooftop Air Conditioner
Product Design Features and Options
CyberPack Systems Design Features and Options
Standard Design Features
•Heavy-duty Welded Aluminum Cabinet with 1”
Acoustical/Thermal Insulation
•Factory Assembled, Self-contained on Galvannealed
Steel Skid Base
•Adjustable Fresh Air Inlet
•Horizontal-flow Air Pattern with Bottom Supply and
Return
•Hinged Access Doors on Front of Cabinet
•Louvered Access Panels For Refrigeration Components
•Highly Efficient EC (Electronically Commutated) Fans
•Two Independent Cooling Circuits with Highly Reliable
Scroll Compressors
•Environmentally Friendly R410A Refrigerant
•Ambient Operation to -30°F with Flooded Head
Pressure Control
•Refrigerant Circuits Fully Charged and Tested Before
Shipment
•Fully Integrated STULZ E² Series System Controller
with Operator Interface Display
•Functional Operations: Cooling, Dehumidification and
Filtration
•4” Thick, MERV 8 Cartridge Air Filters
•Main Power, Non-Fused Disconnect Switch
•Modular Motor Controllers (with Motor Circuit
Breakers)
• Supply and Return Temperature & Humidity Sensors
Available Options
• Direct Air-Side Economizer with Outside Air Sensor
(Exhaust Relief by Others)
•MERV 11, 14 Filtration
• Power Usage Meter
• Firestat
• Smoke Detector
• Spot Type Water Leak Detector(s)
• Utility Outlet Receptacle
• Snap Acting Hot Gas Bypass
• Electric Reheat
• Remote BMS Communications
• Factory Start-up with 2-Year Parts Warranty
• Extended Warranty Options Available On Unit and
Compressors
24/7 Year Round Operation
CyberPack systems are designed for year-round, 24 hrs-a-
day A/C operation in extreme environmental conditions.
Quiet Operation
Low noise scroll compressors coupled with EC fans and
acoustically lined cabinets provide quiet operation.
Non-Proprietary Parts
CyberPack systems incorporate non-proprietary
components where possible. Most major HVAC,
refrigeration and electrical distributors stock an exact
model cross reference or an alternate to most factory
provided components.
Rugged Design
CyberPack systems are constructed with a welded,
corrosion resistant aluminum cabinet on a galvannealed
steel mounting base. The exterior of the cabinet and base
are coated with a durable powder coat finish to further
protect against corrosion. The interior of the cabinet
is lined with 1” elastomeric foam to reduce noise and
minimize thermal losses.
Hinged access doors with positive latching handles
are provided on the front for easy access to filters and
electrical components. Operator controls are conveniently
located inside the electric box and are accessed from the
front. The compressors, receivers and condensers are
isolated from the interior of the cabinet and are easily
accessed behind removable louvered panels that protect
the components from direct sun and allow air flow.
Electronically Commutated (EC) Fans
Maintenance free, highly reliable EC (Electronically
Commutated) Fans offer considerable cost savings and
long life. Direct drive EC Fans do not use drive belts so belt
abrasion dust is eliminated, as is routine belt maintenance.
Fan speed is variable and continuously adjusted via a signal
from the system controller without the use of Variable
Frequency Drives (VFD). EC Fans offer clean, energy
efficient, quiet and low vibration operation.
Modular Motor Controllers
CyberPack systems incorporate modular motor controllers
with motor circuit breakers in lieu of replaceable fuses,
eliminating the need for motor fusing.

2®
CyberPack
Air Filtration
CyberPack systems include high efficiency, disposable
filters which are easily accessed through a hinged access
door on the front of the cabinet. MERV 8 filters are
provided as standard. Optional MERV 11 or MERV 14 rated
filters, offering higher levels of air filtration, are available.
Dual Refrigeration Circuits
CyberPack systems incorporate scroll compressor
technology. Dual compressors are staged for highly energy
efficient system operation. The refrigerant circuits include
flooded head pressure control and a receiver is provided
for each circuit. Evaporator coils are equipped with a
stainless steel condensate pan which drains outside of
the cabinet.
No refrigerant piping in the field is required. CyberPack
systems are piped, fully charged and tested at the factory
before shipment.
Scroll Compressors
Highly reliable scroll compressors are utilized in CyberPack
systems. With fewer moving parts, scroll compressors
have demonstrated superior durability. Scroll compressors
provide higher efficiency, higher reliability and quieter
operation than other compressor technologies.
Air Cooled Condensers
The integrally mounted air cooled condensers are
high efficiency state-of-the-art condensers utilizing
microchannel coils for greater total heat rejection. A
condensing unit for each refrigeration circuit is located
at the end of the cabinet. Microchannel coils in the
condensing units are all-aluminum construction with
microchannel fins.
The condensing units are equipped with high efficiency
EC axial fans. The fans utilize corrosion resistant, multi-
blade impellers designed for high aerodynamic efficiency,
which results in lower power consumption, lower noise
levels and longer life.
Microchannel Condenser Coils
Microchannel coils are constructed of brazed aluminum
high performance fins to provide low air-side pressure
drop and high heat transfer. Microchannel condenser coils
provide the same heat rejection as standard condenser coils,
but with a smaller footprint and require less refrigerant.
In general, Microchannel air cooled condensers provide
the same heat rejection as a standard condenser, but
with up to:
• 20% less refrigerant
• 40% smaller footprint
• 50% lighter weight
Header
Parallel Flow
Tubes
Enhanced
Aluminum
Fins
Microchannel Design
Microprocessor Control
CyberPack systems utilize the highly versatile and flexible
STULZ E2series controls for precision temperature and/or
humidity control. Designed primarily for STULZ precision
air conditioners, STULZ E2Controllers offer a wide range
of expanded control functions and alarms.
The STULZ E2Controller features a “menu-driven”
operating environment to allow system setup and
operation via an easy to read user interface display panel
which is typically mounted inside the electrical enclosure.
Power Usage Meter (Optional)
A power meter is used to monitor real-time power
consumption data. A display screen may be called up
in the E² controller user interface to view the data. The
power consumption data may also be viewed via a BMS
interface to the controller.
Product Design Features and Options

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Packaged Rooftop Air Conditioner
Product Features Index
Model ASC-12C/13C/15C ASC-20A/25A/30A
SELECTED FEATURES
CONTROLS
2-Stage Cooling Mode Standard Standard
Air-Side Economizer (Exhaust by Others) Optional Optional
Microprocessor with Backlit LCD User Interface Standard Standard
BMS Interface Optional Optional
CABINET
Aluminum Construction, Powder Coated Finish Standard Standard
Stainless Steel Condensate Drain Pan Standard Standard
1" Thick, R4.2 Rated Thermal & Sound Insulation Standard Standard
FILTERS
4", MERV 8 Rated Pleated Filters Standard Standard
4", MERV 11 Rated Pleated Filters Optional Optional
4", MERV 14 Rated Pleated Filters Optional Optional
DX REFRIGERATION CIRCUITS
R410A Refrigerant Standard Standard
Dual Scroll Compressors with Rotalock Service Valves Standard Standard
High Efficiency Aluminum Fin/ Copper Tube Coils Standard Standard
Refrigerant Sight Glasses & Filter/ Drier Strainers Standard Standard
AIR COOLED CONDENSER
Microchannel Coils Standard Standard
Flooded Head Pressure Control with Receivers Rated
Down to -30°F Ambient Standard Standard
Axial Fans with EC Motors Standard Standard
SUPPLY FANS / MOTORS
Backward Inclined, Plenum Style Fan, With an EC Motor Standard Standard
ELECTRICAL
3-Phase Power Supply -- See Electrical Table --
Multi-Voltage Control Transformer (24V Class 2) Standard Standard
Modular Motor Controllers with Integral Circuit Breakers Standard Standard
Power Usage Meter Optional Optional
Utility Receptacle Optional Optional
SAFETY FEATURES
Local & Remote Alarms Standard Standard
Main Power Non-Fused Disconnect Switch, Unit Mounted Standard Standard
High/ Low Refrigerant Pressure Switches Standard Standard
Motor Overload Protection Standard Standard
Smoke Detection Optional Optional
Firestat Optional Optional
Water Detector: Spot Type Optional Optional
Water Detector: Dual Spot Type Optional Optional
Water Detector: Strip Type Optional Optional

4®
CyberPack
Technical Specifications and Electrical Data
Model: ASC 12C-DX 13C-DX 15C-DX 20A-DX 25A-DX 30A-DX
NET DX COOLING CAPACITY BASED ON 95°F AMBIENT CONDITIONS (Includes Motor Heat @ Rated CFM & ESP)
105°FDB/70.7°FWB, 17% RH, 52°FDP
Supply Airflow 5,500 6,000 6,000 9,000 12,000 12,000
External Static Pressure (ESP) 0.35 0.35 0.35 0.45 0.45 0.45
Total, kW (MBH) 52.6 (179) 56.6 (193) 60.3 (206) 87.9 (300) 111.0 (379) 120.4 (411)
Sensible kW (MBH) 52.6 (179) 56.6 (193) 60.3 (206) 87.9 (300) 111.0 (379) 120.4 (411)
95°FDB/67.7°FWB, 24% RH, 52°FDP
Supply Airflow 6,000 6,000 6,000 12,000 12,000 12,000
External Static Pressure (ESP) 0.35 0.35 0.35 0.45 0.45 0.45
Total, kW (MBH) 48.0 (164) 50.7 (173) 54.5 (186) 84.1 (287) 99.6 (340) 108.2 (369)
Sensible kW (MBH) 48.0 (164) 50.7 (173) 54.5 (186) 84.1 (287) 99.6 (340) 108.2 (369)
85°FDB/64.4°FWB, 32% RH, 52°FDP
Supply Airflow 6,000 6,000 6,000 12,000 12,000 12,000
External Static Pressure (ESP) 0.35 0.35 0.35 0.45 0.45 0.45
Total, kW (MBH) 42.6 (145) 44.9 (153) 48.7 (166) 74.1 (253) 88.5 (302) 96.5 (329)
Sensible kW (MBH) 42.6 (145) 44.9 (153) 48.7 (166) 74.1 (253) 88.5 (302) 96.5 (329)
80°FDB/67°FWB, 51.1% RH, 60°FDP
Supply Airflow 5,300 5,600 6,000 9,000 11,000 12,000
External Static Pressure (ESP) 0.35 0.35 0.35 0.45 0.45 0.45
Total, kW (MBH) 41.9 (143) 45.0 (154) 49.9 (170) 70.5 (240) 88.5 (302) 98.9 (337)
Sensible kW (MBH) 30.5 (104) 31.5 (108) 32.5 (111) 54.2 (185) 65.3 (223) 68.6 (234)
Calculated EER 12.0 11.5 11.1 11.2 10.6 10.0
Backward Inclined Direct Drive EC Fan
Nominal Power each Supply Fan, hp 4.2 4.2 4.2 4.2 4.2 4.2
Quantity 1 1 1 2 2 2
Evaporator Coil
Rows 4 4 4 4 4 4
Face Area 15.6 15.6 15.6 23.8 23.8 23.8
Scroll Compressors
Number of Scroll Compressors 2 2 2 2 2 2
Condenser Fans
Nominal Power each Condenser Fan 3.8 3.8 3.8 3.8 3.8 3.8
Quantity 2 2 2 4 4 4
Filter
Nominal Size (H" x W" x D") 20 x 20 x 4 20 x 20 x 4 20 x 20 x 4 20 x 20 x 4 20 x 20 x 4 20 x 20 x 4
Quantity 6 6 6 8 8 8
Condensate Drain
in. MPT 3/4 (2) 3/4 (2) 3/4 (2) 3/4 (2) 3/4 (2) 3/4 (2)
Physical Data
Approximate Unit Dimensions*
(L" x W" x H" ) 147 x 74 x 70 147 x 74 x 70 147 x 74 x 70 150 x 88 x 70 150 x 88 x 70 150 x 88 x 70
Approximate Unit Weight (lbs) 2,150 2,150 2,150 3,100 3,100 3,100
* Unit weight and dimensions do not include economizer option
Model ASC-12C-DX ASC-13C-DX ASC-15C-DX ASC-20A-DX ASC-25A-DX ASC-30A-DX
FLA MCA MFS FLA MCA MFS FLA MCA MFS FLA MCA MFS FLA MCA MFS FLA MCA MFS
Cooling without Heat
208/3/60 Consult Factory Consult Factory Consult Factory Consult Factory Consult Factory Consult Factory
460/3/60 27.6 34.0 40.0 29.6 36.0 45.0 33.8 41.0 50.0 51.2 61.4 70.0 58.2 65.6 80.0 64.4 75.8 90.0
575/3/60 23.0 27.0 30.0 24.2 27.7 35.0 28.4 32.0 40.0 41.6 47.7 50.0 49.0 53.3 60.0 56.0 65.0 80.0
Cooling with 12 kW Heater
208/3/60 Consult Factory Consult Factory Consult Factory Consult Factory Consult Factory Consult Factory
460/3/60 42.7 49.1 50.0 44.7 51.1 60.0 48.9 56.1 60.0 66.3 76.4 90.0 73.3 80.7 90.0 79.5 90.8 110.0
575/3/60 35.0 39.1 45.0 36.2 39.7 45.0 40.4 44.0 50.0 53.7 59.7 70.0 61.1 65.3 70.0 68.1 77.0 90.0
Cooling with 24 kW Heater
208/3/60 N/A Consult Factory Consult Factory Consult Factory
460/3/60 N/A 81.3 91.5 100.0 88.3 95.8 110.0 94.5 105.9 125.0
575/3/60 N/A 65.7 71.8 80.0 73.1 77.4 90.0 80.1 89.1 100.0

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Packaged Rooftop Air Conditioner
Dimensional Data - ASC-12C/13C/15C-DX
ASC-12C/13C/15C-DX
DX Cooled with Fresh Air Inlet
ASC-12C/13C/15C-DX
DX Cooled with Air-Side Economizer
Note: Economizer operation requires exhaust air relief to be provided by others.
104.3"
BASE
57.2"
74.1"
147.3"
104.3"
BASE
68.9"
BASE
57.2"
147.3"
FRESH AIR
INLET
REMOVABLE
LIFTING LUG
(4 PLACES)
RETURN AIR INLET
62.9" x 20.9"
SUPPLY AIR OUTLET
55.5" x 28.5"
SUPPLY AIR OUTLET
55.5" x 28.5"
ECONOMIZER
OUTSIDE AIR INLET
REMOVABLE
LIFTING LUG
(4 PLACES)
171.3"
74.1"
68.9"
BASE
RETURN AIR INLET
62.9" x 20.9"

6®
CyberPack
Dimensional Data - ASC-20A/25A/30A-DX
ASC-20A/25A/30A-DX
DX Cooled with Fresh Air Inlet
ASC-20A/25A/30A-DX
DX Cooled with Air-Side Economizer
119.0"
BASE 82.8"
BASE
57.2"
88.0"
150.0"
119.0"
BASE 82.8"
BASE
57.2"
88.0"
150.0"
FRESH AIR
INLET
SUPPLY AIR OUTLET
69.4" x 28.1"
Note: Economizer operation requires exhaust air relief to be provided by others.
SUPPLY AIR OUTLET
69.4" x 28.1"
ECONOMIZER
OUTSIDE AIR INLET
174.0"
REMOVABLE
LIFTING LUG
(4 PLACES)
RETURN AIR INLET
76.8" x 21.9"
REMOVABLE
LIFTING LUG
(4 PLACES)
RETURN AIR INLET
76.8" x 21.9"

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Packaged Rooftop Air Conditioner
STULZ CyberPack Series
42 - 105 kW
Packaged Rooftop Air Conditioner
SUMMARY
This specification describes requirements for a precision
environmental control system. The CyberPack shall provide
precision temperature and/or humidity control for computer
rooms or rooms containing telecommunications or other
highly-sensitive heat load equipment where continuous
24 hour a day, 365 days a year air conditioning is required.
CyberPack systems free up floor space. The units are designed
with a wide range of options to handle both precision and
comfort cooling applications.
DESIGN REQUIREMENTS
The environmental control system shall be a CyberPack
factory-assembled unit. The unit shall be designed for rooftop
installation, requiring access through hinged or removable
access panels.
Each system shall be capable of handling ___CFM. The unit
shall have a total cooling capacity of ___kW/MBH, and a
sensible cooling capacity of ___kW/MBH based on entering
air conditions of ___°F dry bulb and ___°F wet bulb. The
main fan motors shall be ___HP. The unit shall have a power
supply of ___volts___/phase/___frequency.
QUALITY ASSURANCE
The manufacturer shall maintain a set of international
standards of quality management to ensure product quality.
Prior to shipment, each system shall be subject to complete
operational and functional testing based on predefined
procedures. The air conditioner manufacturer shall be ISO
9001 certified. The air conditioner manufacturer shall have
a minimum of 20 years of experience in the design and
fabrication of similar equipment.
CABINET
The CyberPack unit cabinet shall be constructed of formed
5052 grade aluminum for corrosion protection. The cabinet
shall be of formed sections, welded, and ground smooth.
The exterior shall be finished with a weather and UV resistant
coating. Unit air leakage shall be less than 1% of design
airflow rate measured at rated unit static pressure.
The cabinet interior shall be insulated with 1” thick closed
cell elastomeric insulation providing a minimum R-value of
4.2. This thickness provides greater insulation value than
lesser insulations which results in less energy lost through
the cabinet. As opposed to fiberglass insulation with facing
that can easily tear, there are no glass fibers which can enter
the airstream.
Air Filtration
All units shall be supplied with disposable air filters classified
as UL 900 or UL 586. Filters shall be 4” deep (nominal).
Filters shall be pleated with a Minimum Efficiency Reporting
Value (MERV) of 8. Filters shall be accessible through the
front of the unit.
Optional: Filters rated up to MERV 14 shall be available.
MECHANICAL COMPONENTS
Supply Fans
The blower(s) shall be direct driven, single inlet, backward
curved centrifugal fan with an electronically commutated
motor for maintenance free operation. The motor shall
include: Integrated electronic control board and direct
microprocessor control signaling for fan speed control,
soft-starting capabilities, and integrated current limitations.
Each fan shall be low noise and low vibration and have an
anti-corrosive aluminum impeller. Each fan impeller shall be
dynamically and statically balanced in two planes to minimize
vibration during operation.
Product Guide Specifications

8®
CyberPack
DX REFRIGERATION SYSTEM
Refrigeration System
All piping and components contained within the refrigeration
system shall be rated for use with R410A refrigerant. Each
refrigeration circuit shall include, as a minimum, a refrigerant
dryer/strainer, sight glass with moisture detector, condenser
coil, thermal expansion valve, evaporator coil, compressor,
high pressure switch with manual reset, and a low pressure
switch with automatic reset.
Evaporator Coils
Cooling coils shall be fabricated of seamless drawn copper
tubes, mechanically bonded to aluminum fins (that have an
enhanced design for maximum heat transfer) and encased in
a galvanized steel frame. Nominal face velocity shall not be
more than 500 ft./min. at maximum rated airflow.
Coils shall be provided with a stainless steel drain pan
extending beyond the leaving coil face. Cooling coil drain
pans shall be sloped in the direction of airflow. A condensate
drain line shall be piped to the cabinet exterior for field
connection of a trap (provided by others). Evaporator coils
shall be leak tested using pressurized dry nitrogen at the
factory. The air conditioner shall ship with a refrigerant
charge of R-410A.
Condenser Fans
Condenser fans shall be axial, direct drive with electronically
commutated (EC) motors. Fan speed is variable without the
need for an external variable frequency drive. Fan speed is
modulated in response to refrigerant head pressure. The
EC condenser fan shall contain permanently lubricated ball
bearings. Fans requiring re-greasing shall not be acceptable.
Condenser Coils
Condenser coils are microchannel type to provide greater
capacity, greater efficiency, and require less refrigerant.
Flooded head pressure control is provided for operating to
-30F ambient. Liquid receivers and compressor crankcase
heaters are included.
Scroll Compressor
The compressors shall be a high efficiency, high reliability
and low noise scroll compressor. The compressor shall be
complete with internal vibration isolation, internal thermal
overloads, an internal pressure relief valve, an internal
discharge gas vibration eliminator, and external vibration
mounting isolation.
Snap-Acting Hot Gas Bypass (Optional)
The CyberPack system shall incorporate a snap acting hot gas
bypass system to provide modulation of the unit’s cooling
capacity and evaporator coil freeze protection under low
load conditions.
ELECTRICAL SYSTEM
The electrical system shall be factory wired in accordance
with NFPA 70 (NEC). A single point power connection shall
be provided for main power. In accordance with NEC Class II
requirements, the control circuit shall be 24VAC and wiring
shall not be smaller than 24 AWG. Each wire shall end with a
service loop and be neatly secured and labeled in accordance
with the unit electrical drawing. Components in the electrical
enclosure shall be labeled in accordance with the electrical
drawing.
Each high voltage circuit shall be individually protected on all
three phases. Fan motors and compressors shall have thermal
and short circuit protection.
Main Power Service Switch
The CyberPack system shall be provided with a unit mounted
main power, non-fused service switch.
Remote Stop/Start Contacts
Included in the system’s electrical control circuit shall be
a 2-pin terminal connection for remote stop/start of the
CyberPack.
Power Usage Meter (Optional)
A power meter is used to monitor real-time power
consumption data. A display screen may be called up in the
E² controller user interface to view the data. The power
consumption data may also be viewed via a BMS interface
to the controller.
Utility Receptacle (Optional)
A 120VAC, 20A utility receptacle shall be provided and
mounted on the CyberPack exterior. The receptacle shall be
GFCI and includes a weather proof cover. 120VAC power
shall be provided by others.
Product Guide Specifications

9
®
Packaged Rooftop Air Conditioner
Product Guide Specifications
CONTROLS
All functions of the air conditioner shall be controlled by
a factory installed STULZ E² Series controller. The control
program shall be specific to the air conditioner and include
user-adjustable setpoints and tuning. STULZ E² Controller
includes supply and return temp/RH sensors shipped loose.
E² Series Controller Description
General
The advanced microprocessor based STULZ E² series
controller shall be equipped with flexible software capable of
meeting the specific needs of the application. The setpoints
shall be default and their ranges shall be easily viewed and
adjusted from the user interface display. The program and
operating parameters shall be permanently stored on a non-
volatile system in the event of power failure.
The controller shall be designed to manage temperature and
relative humidity (RH) levels to a user defined setpoint via
control output signals to the DX system.
The controller shall receive inputs for measurable control
conditions (temperature, relative humidity, and dew point)
via return air or room mounted sensors. The internal logic
shall then determine if the conditions require cooling or
dehumidification. Control setpoints shall be established to
maintain design conditions of the installation. The controller
shall respond accordingly to changes in these conditions and
control the output/demand for the appropriate mode of
operation until user defined conditions are achieved.
Field Configurable
The program for the STULZ E² series controller shall be field
configurable, allowing the operator the capability of selecting
control setpoints specific to the application. Operator
interface for the STULZ E² Controller is provided via a user
interface display panel. The display panel shall have a backlit
LCD graphical display, and function keys, giving the user
complete control and monitoring capability of the precision
cooling system. The menu driven interface shall provide users
the ability to scroll through and enter various menu screens.
Password Protection
Access to the Info Menu, Alarms Log, and the ability to
monitor room conditions shall be allowed without the use of a
password. Modifications to the control setpoints shall require
the use of a password. The controller shall be programmed
to recognize predetermined security levels before allowing
access to display screens containing critical variables. Three
secured menu levels (Control, Service and Factory) shall
support unique passwords that must be entered to access
the menu screens so only authorized personnel may perform
modifications to the settings.
Restorable Parameters/Factory Defaults
Upon initial start-up, the air conditioning system shall operate
using the setpoints programmed by the factory. The customer
may enter new operating parameters in the control menu and
the system shall then operate accordingly. The new setpoints
may be stored as, "Customer Default Setpoints". The primary
setpoints entered by the factory still remain stored in the
controller's memory as "Factory Setpoints". The setpoints
for the system may be re-adjusted in the Control menu at
any time. If it becomes necessary, the customer may restore
the setpoints back to the Customer Default setpoint values
or to the original Factory (primary) setpoint values.
Alarms
Alarm conditions shall activate a red LED indicator that
backlights the alarm function key. As an option, an alarm
condition may also be enunciated by an audible alarm signal.
An alarm is acknowledged by pressing the alarm key. This
calls up alarm display screens that provide a text message
detailing the alarm conditions. After an alarm condition is
corrected, the alarm can be cleared by pressing the alarm key.
Small Bezel Display Panel
The small bezel user interface display panel features an easy
to read, backlit liquid-crystal alphanumeric display equipped
with contrast adjustment and LED illuminated function
keys. The screens that appear on the user interface display
panel present data that originates from the controller I/O
module. The controller is operated via a 6-key menu-driven
loop structure and offers an alarm log plus four different
interface menu levels to the operator: Information, Control,
Service, and Factory. These menus permit the user to easily
view, control, and configure operating parameters for the
air conditioning unit.
Air-Side Economizer (Optional)
The CyberPack system shall be equipped with a unique
air-side economizer for applications utilizing outdoor Air-
Side Economizing. The STULZ Air-Side Economizer package
shall include return air and outside air dampers, outdoor
temperature and humidity sensor, remote space return
air sensor, and supply air sensor for proper control during
economizer operation. Control settings shall be included for
both temperature and humidity properties of the outdoor air.
A damper signal lockout shall be included if the outdoor air
conditions reach user adjustable limits.

10 ®
CyberPack
Product Guide Specifications
The economizing damper signal shall allow a minimum output
setting for minimum outside air control to meet ventilation
requirements.
Exhaust relief is not included and must be provided by others
to prevent over-pressurizing the controlled space.
BMS Interface (Optional)
The STULZ E² series controller shall incorporate a 10 Mbps
communication interface port that can be field connected
through a serial interface to a Building Management System
via Modbus, BACnet, SNMP, or HTTP as configured by
the factory. A controller interfaced to a network must be
configured for BMS communication.
STULZ E² Constant Contact (Optional)
The control package shall include a STULZ Constant Contact
short term power supply for the STULZ E² series controller
to allow the controller to manage the power transfer switch
from one primary power source to another while maintaining
communications with an active monitoring system. The E²
Constant Contact shall permit a minimum of one minute
ride thru period. The Constant Contact shall include LED
indications for presence of power, low charge indication, and
minimum backup time.
SAFETY FEATURES
Smoke Detection (Optional)
A photo-electric smoke detector shall be factory installed
and wired in the return air section of the CyberPack system.
The photo-electric detector shall include built-in circuitry
that performs a functional test of all detection circuits at
least once every 40 seconds without the need for generating
smoke. The UL listed velocity range shall be 0-3000 fpm. The
air conditioner shall shut down upon sensing smoke in the
return air stream.
Firestat (Optional)
The air conditioner shall be provided with a factory mounted
and wired firestat. The firestat shall shut down the air
conditioner upon sensing air temperatures that indicate a fire.
Remote Water Detector: Spot Type
(Optional)
A remote single-point water and leak detector shall be factory
supplied and shall ship separately for field installation. Upon
sensing a water leak, the normally-closed water detector
control circuit shall open, thereby shutting down the
CyberPack system’s water producing components.
Remote Water Detector: Dual Spot Type
(Optional)
Quantity 2-(two) remote single point water/leak detector
shall be factory supplied and shall ship separately for field
installation. Upon sensing a water leak, the normally-closed
water detector control circuit shall open, thereby shutting
down the CyberPack's water producing components.
Remote Water Detector: Strip Type
(Optional)
A 20 foot (6 m) long remote strip/cable-type water and
leak detector shall be provided for remote field installation.
Upon sensing a water leak, the normally-closed water
detector control circuit shall open, thereby shutting down
the CyberPack system’s water producing components.

11
®
Packaged Rooftop Air Conditioner
Notes

12 ®
CyberPack
STULZ mission is to be the premier provider of
energy efficient temperature and humidity control
solutions for mission critical applications.
Production Facilities: U.S.A. •Germany •Italy •China •India
ISO-9001 Quality Management System - Requirements
ISO9001
Registered
Quality System
STULZ Air Technology Systems, Inc.
1572 Tilco Drive, Frederick, Maryland 21704
Phone: [phone] • Fax: [phone]
E-mail: [email protected]
www.STULZ-USA.com
February 2016
QENA019-
Specifications subject to change without notice.
®