
Air Cooled Liquid Chiller
30kW - 450kW

Technical Manual : Part No 6259543 TM E_1.3.0 04/2013
About Airedale Products & Customer Services
WARRANTY,
COMMISSIONING &
MAINTENANCE
The equipment carries Airedale’s standard Parts (non consumable) & Labour warranty for a period
of 12 months from the date of commissioning or 18 months from the date of despatch, which ever
is the sooner. (Excludes the cost of any specialist access or lifting equipment.) Commissioning will
be carried out by Airedale International Air Conditioning Ltd or an approved Airedale
commissioning company.
To further protect your investment in Airedale products, we have introduced Airedale Service, who
can provide full commissioning services, comprehensive maintenance packages and service cover
24 hours a day, 365 days a year (UK mainland). For a free quotation contact Airedale Service or
your local Sales Engineer.
All Airedale products are designed in accordance with EU Directives regarding prevention of build up
of water, associated with the risk of contaminants such as Legionella.
Where applicable, effective removal of condensate is achieved by gradient drainage to outlets and
where used, humidification systems produce sterile, non-toxic steam during normal operation.
For effective prevention of such risk it is necessary that the equipment is maintained in accordance
with Airedale recommendations.
Warranty cover is not a substitute for Maintenance. Warranty cover is conditional to maintenance
being carried out in accordance with the recommendations provided during the warranty period.
Failure to have the maintenance procedures carried out will invalidate the warranty and any liabilities
by Airedale International Air Conditioning Ltd.
A spares list for 1, 3 and 5 years will be supplied with every unit and is also available from our
Spares department on request.
As well as our comprehensive range of products, Airedale offers a modular range of Refrigeration
and Air Conditioning Training courses, for further information please contact Airedale.
For further assistance, please e-mail: enquiries@airedale.com or telephone:
tech.support@airedale.com
For information, visit us at our Web Site: www.airedale.com
AIAC Ltd endeavours to ensure that the information in this document is correct and fairly stated, but
none of the statements are to be relied upon as a statement or representation of fact. AIAC Ltd does
not accept liability for any error or omission, or for any reliance placed on the information contained
in this document.
The development of Airedale products and services is continuous and the information in this
document may not be up to date. It is important to check the current position with AIAC Ltd at the
address stated. This document is not part of a contract or licence unless expressly agreed.
No part of this document may be reproduced or transmitted in any form or by any means, electronic
or mechanical, including photocopying, recording, or information storage and retrieval systems, for
any purpose other than the purchaser's personal use, without the express written permission of
AIAC Ltd.
2013 Airedale International Air Conditioning Limited. All rights reserved. Printed in the UK.

Technical Manual : Part No 6259543 TM E_1.3.0 04/2013
GENERAL DESCRIPTION 4
Unit Identification 4
Introduction 4
Features 5
Standard Features 6
Optional Extras - Energy Saving 7
Optional Extras - General 7
DESIGN FEATURES & INFORMATION 9
Electronic Expansion Valves 9
Minimum System Water Volume Calculations 10
Controls 11
Control Scheme Features 13
PERFORMANCE DATA 14
Capacity Data 14
Operating Limits 17
Glycol Data 17
Waterside Pressure Drops 18
Pump Packages 20
Sound Data 23
GENERAL SPECIFICATION 27
Mechanical Data 27
Electrical Data 31
Dimensions 35
INSTALLATION DATA 39
Unit Lifting 39
Positioning 40
Anti Vibration Mounting 41
Water System 42
Flow Schemes 43
Pump Options - Flow Schemes 44
Interconnecting Wiring 46

Technical Manual : Part No 6259543 TM E_1.3.0 04/2013
AIR COOLED LIQUID CHILLER
Ultima Compact Chiller - Cooling Only
Model Size (Expressed as Nominal Cooling in kW)
Single Circuit - Quiet Chiller (Models 30-80 (Except 75) Only)
Single Circuit - Super Quiet Chiller (Models 30-80 (Except 75) Only)
Double Circuit - Standard Chiller
Double Circuit - Quiet Chiller
Double Circuit - Super Quiet Chiller
Single or Double Row of Fans
The Airedale range of Ultima Compact air cooled liquid chillers covers the nominal
capacity range 30kW to 450kW in 23 model sizes. The range is available with many
optional variations including Quiet and Super Quiet sound level variants.
Attention has been placed on maximising the unit’s performance while keeping the sound
and vibration levels and footprint to an absolute minimum.
Airedale certify that the equipment detailed in this manual conforms with the following
EC Directives:
Electromagnetic Compatibility Directive (EMC)
Low Voltage Directive (LVD)
89/392/EEC in the version 98/37/EC
Pressure Equipment Directive (PED)
To comply with these directives appropriate national & harmonised standards have been
applied. These are listed on the Declaration of Conformity, supplied with each product.
The range has been designed and optimised for operation with the ozone benign
R407C refrigerant.
The base is fabricated from galvanised steel to ensure a tough, durable,
weatherproof construction.
The superstructure is manufactured from galvanised sheet steel coated with epoxy baked
powder paint to provide a durable and weatherproof finish. Standard unit colour is Light
Grey (RAL 7035).
Compressors and evaporator are mounted on a rigid galvanised heavy-duty sub frame.
Fully weatherproofed electrical panels are situated at one end of the unit. Access to the
compressors is via end panels adjacent to the electrical control panel.
Dedicated Compressor Enclosure
Condenser Fan Discharge Plenum

Technical Manual : Part No 6259543 TM E_1.3.0 04/2013
UCC30, UCC40,
UCC50, UCC60, UCC70
& UCC80
UCC75, UCC100,
UCC125 &
UCC150
UCC110,
UCC130, UCC160
& UCC180
UCC275, UCC300,
UCC330, UCC360,
UCC400 & UCC450
4 x eye bolts to BS4278 or Integrated lugs/Mounting feet
Acoustically lined compressor enclosure
Full Operating Charge of R407C
Number of Independent Refrigeration Circuits
Scroll Compressor Arrangement
1 x Tandem Set
or 2 x Single
2 x Tandem Sets
(UCC275-300)
2 x Trio Sets
(UCC330-450)
Enhanced Refrigeration Condenser Coils
Extra Low speed condenser fan
Thermostatic Expansion valve & Liquid line solenoid valve
Electronic Expansion Valve
Opt (SQ/DQ Models)
Opt (SSQ/DSQ Models)
DQ/DSQ Models
Opt (D Models)
DQ/DSQ Models
Opt (D Models)
DQ/DSQ Models
Opt (D Models)
Liquid and Discharge line ball valve
Large capacity filter drier
Manual reset HP/LP Switch (LP via microprocessor)
Suction and liquid pressure transducers
Compressor minimum differential pressure protection
Pressure relief valve, integral rupture disc & gauge
AireTronix Microprocessor Controller
Modulating Head Pressure Control
Individual door isolated mains power compartments for
each refrigeration CCT, fans & pump option
Dedicated bus-bar chamber for incoming 3-phase & earth
mains power supply (no neutral required)
Trace Heating to Internal Pipework
Connections for External Trace Heating
Phase Rotation Protection

Technical Manual : Part No 6259543 TM E_1.3.0 04/2013
Stainless steel high efficiency brazed plate heat exchanger(s) will allow optimum heat
transfer between media. Each heat exchanger is insulated with closed cell polyurethane
foam to Class 1 fire rating.
A pad heater is fitted to the single evaporator and will protect against freeze up in
ambient temperatures as low as -20°C.
Internal water pipework is trace heated.
Connections for External Trace Heating (240V/500W available).
Large surface area coil(s) ideally positioned to optimise airflow and heat transfer,
manufactured from refrigeration quality copper tubes with mechanically bonded
aluminium fins.
Axial fan assemblies with fingerproof grille and incorporating external rotor motor
technology, to provide highly accurate discreet speed control, discharge air vertically. The
fans offer maximum performance while keeping sound levels to a minimum.
Electrical supply dependent upon model size, refer to Electrical Data.
Electronic head pressure controllers are fitted which modulate the fan speed to maintain
a constant condensing pressure, allowing the system to operate satisfactorily in ambient
temperatures as low as -20°C.
Head pressure can be set, monitored and values viewed at the microprocessor display.
Scroll compressors comprising:
Internal motor protection
Internal pressure relief
Non return valve
External discharge temperature protection
Oil sight glass
Sump heater
Each Tandem / Trio set has an oil equalisation line.
The compressors are mounted to the rigid galvanised heavy duty sub-frame with the use
of vibration reducing isolation.
microprocessor controller can provide 2, 4 or 6 stages of
capacity control, dependent upon model type.
Optionally, the controller is designed to provide capabilities for;
Building Management Systems
Sequencing (Master/Slave and Run/Standby)
to meet all your system requirements, please confirm at time of order.
For further details, refer to Controls.
Dedicated weatherproof electrical power and controls panels are situated at the end of
the unit and contain:
Separate, fully accessible, controls compartment, allowing adjustment of control set
points whilst the unit is operational
Circuit breakers for protection of all major unit components
Separate, permanent supply for controls/trace heating, 230V/50Hz/1ph
The electrical power and control panel is wired to the latest European standards and
codes of practice.
Mains supply is 3 phase and a neutral is not required. Refer to Interconnecting Wiring.

Technical Manual : Part No 6259543 TM E_1.3.0 04/2013
OPTIONAL EXTRAS - ENERGY SAVING
When applied to the motors of each compressor, the compressor power factor is
controlled to a minimum operating value of 0.95 at the full operating capacity. This
satisfies many supply authorities that may impose surcharges on equipment with power
factor less than 0.95.
Electronic Expansion
Valves
Electronic expansion valves differ to the normal thermostatic expansion valves in their
ability to maintain control of the suction superheat at reduced head pressures. This can
lead to significant energy savings particularly at minimum loading and low ambient
temperatures. Factory fitted, for full details refer to the Design Features & Information -
Electronic Expansion Valves section.
OPTIONAL EXTRAS - GENERAL
Epoxy Coated
Condenser Coils
In atmospheres where high corrosion is anticipated epoxy coated aluminium finned coils
can be fitted.
Guards can be fitted to each of the outer coils to protect against damage.
Anti Vibration Mounts
(Spring Type)
Spring vibration isolators can be supplied loose for on site fitting to the base frame of
each chiller unit.
The isolators are suitable for fitting to a concrete slab or structural steelwork providing the
surface is level and of sufficient strength where a high level of vibration elimination
is required.
For further details, please refer to Anti Vibration Mounting section.
Anti Vibration Mounts
(Pad Type)
Pad vibration isolators can be supplied loose for on site fitting to the base frame of each
chiller unit.
The isolators are suitable for fitting to structural steelwork providing the surface is level
and of sufficient strength where a moderate degree of vibration elimination is required.
For further details, please refer to Anti Vibration Mounting section.
For the efficient temperature and capacity operation of multiple units on a single site, the
sequence controller will permit interlinked operation of the complete system thereby
providing optimum temperature control and minimum power consumption.
Included within this package is a site visit by Airedale Control Specialists to set up
multiple unit sequence control.
Controlled chillers to be interfaced with most BMS, factory fitted,
please contact Airedale.
Dual Pressure Relief
Valve
A 3-way dual shut-off valve that incorporates 2 relief valves and rupture disc assemblies
per circuit. The valve allows the maintenance of individual pressure relief valves and
rupture discs without the need for refrigerant evacuation.
The electronic soft start enables the chiller compressor motor to be ramped to speed with
the minimum full load current. Further benefits include removal of nuisance tripping,
supply voltage dips and motor overheating.
A factory calibrated and fitted leak detection kit, will raise an alarm when refrigerant gas
is detected.
Condenser Fan
Discharge Air Plenum
Extension
Constructed from galvanised sheet steel coated with epoxy baked powder paint, this
plenum directs discharge air vertically, thus limiting air re-circulation and provides a
degree of acoustic reduction in the horizontal plane, factory fitted. For details please
contact Airedale.
Standard unit colour is Light Grey (RAL 7035).
For further details refer to Dimensions.
The factory fitted flow switch will protect the chiller against low water flow.

Technical Manual : Part No 6259543 TM E_1.3.0 04/2013
OPTIONAL EXTRAS - GENERAL - ALL MODELS
A 20 mesh water filter can be factory fitted on the inlet water pipework to protect the
evaporator from clogging by sediment.
Differential Pressure
Switch
Facilitates low flow limiting and pressure drop monitoring via the microprocessor.
Allows the chilled water setpoint to be adjusted via an external 0-10V signal.
Flushing Bypass Kit
(Standard)
Factory fitted to protect the evaporator from clogging by sediment and to enable the water
system to be purged before running.
Flushing Bypass Kit
(Regulating)
Double regulating valve
Factory fitted to protect the evaporator from clogging by sediment and to enable the water
system to be purged before running.
The regulating Flushing Bypass Kit additionally allows the chiller to run with a lower T
(typically for chilled beam and/or high water temperature applications).
Integral pumps may be fitted, standard or larger sizes selected to suit installed system
requirements. The following configurations are available:
Factory fitted with electrical switchgear and isolating
valve.
Factory fitted with common inlet and outlet connections
and twin motor and pump impellers. Featuring automatic
changeover via a paddle switch, electrical switchgear and
isolating valve.
Single Head Run/Standby
Pumps
Factory fitted Dual pumps with shut off valves on the inlet
and outlet and non-return valves on the outlet in
automatic changeover configuration. Supplied with
electrical switchgear and isolating valve.
The microprocessor can be programmed to automatically
rotate usage of the run/standby pumps to a set period.
For further details, refer to Optional Flow Schemes.
Mini Pressurisation
Package
Integral package automatically monitors and adjusts operation of a separate make-up
pump to ensure a constant minimum system water pressure (typically 2.5 Barg),
factory fitted.
Buffer Tank & Expansion
Vessel
An integral water buffer vessel and expansion vessel can be factory fitted on systems
where low water volume may be a problem.
All vessels and pipework are trace heated.
Commissioning Station
& DRV
A commissioning valve set which includes a double regulating valve and a metering
station can be factory fitted.
For applications outside the EU, units can be supplied for use with R22, please specify at
time of order.
Airedale Service provides a full commissioning service carried out by professionally
trained, industry experienced engineers. For a competitive quotation, please contact
Airedale Customer Services.
In addition to commissioning, a 24 hour, 7 days a week on-call service is on available
throughout the year. This service will enable customers to contact a duty engineer outside
normal working hours and receive assistance over the telephone. The duty engineer can,
if necessary, attend site, usually within 24 hours or less. Full details will be forwarded on
acceptance of the maintenance agreement.

Technical Manual : Part No 6259543 TM E_1.3.0 04/2013
Design Features & Information
ELECTRONIC EXPANSION VALVES
Thermostatic Expansion
Valves
Whilst offering versatile control at the full design duty of the chiller, standard TEVs do not
automatically optimise themselves to all operating conditions. Therefore, if the chiller is
operating at 40% or 50% of full load, especially at a lower ambient temperature than that
for which the valve was sized, the conventional TEV must have the design head pressure
available to ensure good refrigerant control. Maintaining an artificially high condensing
pressure is normal in conventional systems.
Electronic Expansion
Valves
Using an EEV allows for good refrigeration control with the chiller operating at part load
and lower ambient conditions with a reduced condensing pressure. By fitting an EEV and
adjusting the head pressure control setting, reduction in energy running values of up
to 27% can be achieved. The Mollier diagram shown below helps to illustrate how this
increase in efficiency is achieved.
EEV’s differ to normal thermostatic expansion valves in their ability to maintain control of
refrigerant flow and the suction superheat at reduced head pressures. The turn-down rate
of a typical EEV is superior to that of it’s thermostatic equivalent, such that a reduced
optimum condensing pressure can be maintained at low compressor load. However low
the load is on the compressor, from zero to 100%, there will not be a problem with turn
down, even below 30% rated capacity.
Reduced
Condensing
Pressure
Reduction in
Compressor
Input Power
Cooling Cycle @ 22°C ambient with a conventional TEV fitted.
Cooling cycle @ 22°C ambient, demonstrating a typical EEV
condensing temperature taking full advantage of lower ambient air
temperatures (below 30°C).

Technical Manual : Part No 6259543 TM E_1.3.0 04/2013
Design Features & Information
MINIMUM SYSTEM WATER VOLUME CALCULATIONS
Where the system permanent heat load is known:
Water Flow Rate (litres/minute) x Minimum Compressor Run Time
(mins) x Chiller Loading Factor
Vm is the minimum water volume in litres
Minimum Compressor Run Time is 2 minutes
Minimum Turndown (kW) x 1.2
The Chiller Loading Factor limits:
Max 1.00
Min 0.25
250 kW Chiller, 7/12°C Water, Model UCC250DQ-8/2 with a permanent load of 95 kW
Where the system permanent heat load is unknown:
Water Flow Rate (litres/hour) x Minimum Turndown Ratio x 1.2
Maximum Compressor Starts per Hour
Where
Minimum Turndown Ratio = Minimum Stage Capacity (kW)
Chiller Full Capacity (kW)
250 kW Chiller, 7/12°C Water, Model UCC250DQ-8/2 permanent load unknown
Method 1 is always preferred.

Technical Manual : Part No 6259543 TM E_1.3.0 04/2013
Design Features & Information
microprocessor controller offers powerful analogue and digital control to
meet a wide range of monitoring and control features including a real time clock and
Industry standard communication port and network connections.
The controller’s inbuilt display is used for viewing the unit operating status and making
adjustments to control parameters by allowing the operator access to a series of
display pages.
Also featured are a visual alarm and the facility to adjust and display control settings by
local operator for information and control.
08:44 13/05/02 Mst
Remote 0-10V Input
Signal Voltage 05.6V
Unit ON
1 UP/DOWN KEYS
To change Adjustable Fields & Scrolls
up & down available Menus
2 ENTER
Selects Menus & Moves Cursor to
Adjustable Fields Green LED
3 ESC
Green LED lit when Operating Page
displayed, Returns to Operating Page
Screen when pressed
4 PROGRAM
Opens the Available Menus
5 ALARM
Red LED Indicates Alarm Present
6 4 ROW LCD DISPLAY
7 CURSOR (FLASHING): Top Left
Position = “HOME” Indicates adjustable
Fields
Disables/Enables the chiller remotely.
Compressor Anti Cycle
Control
Automatic via the Microprocessor.
Limits the condensing pressure by unloading above 24Barg.
Limits the evaporating pressure by unloading at the minimum pressure setpoint, which is,
adjustable depending on system glycol content.
Disables/Enables the pump(s) remotely.
Remote Setback
Temperature Setpoint
Switch
A setback setpoint for supply water temperature can be selected to suit summer/winter
conditions or night setback.
Displays hours run of each compressor.
Displays hours run of each pump.
The control system integrity can be maintained by restricting access with a password
PIN number.
IMPORTANT: To change the PIN number, please contact Airedale at time of order
with the preferred 4 digit number.

Technical Manual : Part No 6259543 TM E_1.3.0 04/2013
Design Features & Information
The microprocessor maintains the set supply Chilled Water temperature by sensing the
return and supply water temperatures and manages the compressor loading.
The microprocessor also monitors and displays the following measured parameters:
Supply Water Temperature
Return Water Temperature
Suction Pressure of each circuit
Liquid Pressure of each circuit
Suction Temperature at each circuit (when the EEV option is fitted)
Superheat for each circuit (when the EEV option is fitted)
The following conditions will be detected, triggering a visual display:
Common for both circuits (Dual Circuit units):
Low Supply Temperature
Emergency Stop
Water Flow
Pump(s) status
Pump(s) remote start
Individual for each circuit:
Individual alarms will isolate the affected circuit only.
Compressor Trip
Low Suction Pressure for each circuit
High Liquid Pressure for each circuit
Volt Free Contact Alarm Indication
Low Pressure Switch
Compressor Overload
High Compressor Discharge Temperature
) can be used to connect a number of chiller controllers to
offer intercommunication and sequence control. There is also the facility to allow the
connection of either a computer or modem for local or remote monitoring. For further
details, please contact Airedale.

Technical Manual : Part No 6259543 TM E_1.3.0 04/2013
Design Features & Information
Airedale recognises that all chiller applications are different but fall mainly into 2
application categories; Variable Supply Temperature and Constant Supply Temperature.
The onboard microprocessor has the capability of satisfying either control requirement as
illustrated below. Using the Airedale Variable Supply Temperature control scheme,
energy savings are available when compared with previous schemes and that of the
Constant Supply Temperature application.
Variable Supply Temperature control schemes offer energy savings where the supply
water temperature is not critical to its operation.
Selection of the best application control scheme can be made via a soft switch in the
microprocessor during initial commissioning.
Examples based on Models UCC200D-6/2 having 6 Stages of Cooling
Variable Supply
Temperature Control
Constant Supply
Temperature Control
Factory set to Variable Supply Temperature Control unless otherwise stated
at order.
Only when the mode selection has been set can the unit be enabled.

Technical Manual : Part No 6259543 TM E_1.3.0 04/2013
Leaving Water
Temperature °C
Output kW refers to the chilled water duty.
Input kW refers to the compressor input power.
Duties applicable for chilled water T between 4 and 8°C.
Interpolate for water temperatures between those quoted, do not extrapolate.
Leaving Water
Temperature °C
Water flow rate (l/s) = Output ÷ (4.19 x T) Except Glycol use, refer to Glycol Data.
For conditions outside those quoted, please refer to Airedale.
For operation in the shaded area, please refer to Airedale.
Performance Data

Technical Manual : Part No 6259543 TM E_1.3.0 04/2013
Leaving Water
Temperature °C
Output kW refers to the chilled water duty.
Input kW refers to the compressor input power.
Duties applicable for chilled water T between 4 and 8°C.
Interpolate for water temperatures between those quoted, do not extrapolate.
Leaving Water
Temperature °C
Water flow rate (l/s) = Output ÷ (4.19 x T) Except Glycol use, refer to Glycol Data.
For conditions outside those quoted, please refer to Airedale.
For operation in the shaded area, please refer to Airedale.
Performance Data
CAPACITY DATA - QUIET - SQ/DQ MODELS