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.

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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.

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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

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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"

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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"