AIREDALE LogiCool LCC20 User manual

COVER
LogiCool™
FreeCooling Chiller
20kW - 40kW
R410A
TECHNICAL MANUAL

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ABOUT AIREDALE
About Airedale Products & Customer Services
WARRANTY
All AIAC products or parts (non consumable) supplied for installation within the UK mainland and
commissioned by an AIAC engineer, carry a full Parts & Labour warranty for a period of 12 months
from the date of commissioning or 18 months from the date of despatch, whichever is the sooner.
Parts or Equipment supplied by AIAC for installation within the UK or for Export that are properly
commissioned in accordance with AIAC standards and specification, not commissioned by an AIAC
engineer; carry a 12 month warranty on non consumable Parts only from the date of commissioning
or 18 months from the date of despatch, whichever is the sooner.
Parts or equipment installed or commissioned not to acceptable AIAC standards or specification
invalidate all warranty.
Warranty is only valid in the
event that
In the period between delivery and commissioning the equipment: is properly protected & serviced as
per the AIAC installation & maintenance manual provided where applicable the glycol content is
maintained to the correct level.
In the event of a problem being reported and once warranty is confirmed as valid under the given
installation and operating conditions, the Company will provide the appropriate warranty coverage
(as detailed above) attributable to the rectification of any affected Airedale equipment supplied
(excluding costs for any specialist access or lifting equipment that must be ordered by the customer).
Any spare part supplied by Airedale under warranty shall be warranted for the unexpired period of
the warranty or 3 months from delivery, whichever period is the longer.
To be read in conjunction with the Airedale Conditions of Sale - Warranty and Warranty Procedure,
available upon request.
CAUTION
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.
SPARES
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.
TRAINING
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.
CUSTOMER SERVICES
For further assistance, please e-mail: enqui[email protected]m or telephone:
Customer Service s
UK Sales Enquiries
+ 44 (0) 113 238 7789
[e-mail]
International Enquiries
+ 44 (0) 113 239 1000
[e-mail]
Spares Hot Line
+ 44 (0) 113 238 7878
[e-mail]
Airedale Service
+ 44 (0) 113 239 1000
[e-mail]
Technical Support
+ 44 (0) 113 239 1000
[e-mail]
Training Enquiries
+ 44 (0) 113 239 1000
[e-mail]
For information, visit us at our Web Site: www.airedale.com
LegalN otic es
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.
2016 Airedale International Air Conditioning Limited. All rights reserved. Printed in the UK.

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CONTENTS
Contents
Warranty ................................................................................................................................ 2
General Description 4
Unit Identification ................................................................................................................... 4
Introduction............................................................................................................................ 4
Refrigerant............................................................................................................................. 4
Construction........................................................................................................................... 5
Standard Features - Energy Saving....................................................................................... 5
Standard Features - General ................................................................................................. 7
Optional Extras - Energy Saving............................................................................................ 8
Optional Extras - General....................................................................................................... 8
Design Features & Information 10
Electronic Expansion Valves (EEV) ..................................................................................... 10
Digital Scroll Compressors................................................................................................... 11
Pipework design................................................................................................................... 12
Minimum System Water Volume Calculations ..................................................................... 13
Temperature Control............................................................................................................ 16
Monitoring............................................................................................................................ 17
Performance Data 18
ESEER Calculations ............................................................................................................ 18
FSEER Calculations............................................................................................................. 18
Capacity Data - DX (Mechanical) Cooling............................................................................ 19
Operating Limits................................................................................................................... 19
Capacity Data - Free Cooling............................................................................................... 20
Glycol Data .......................................................................................................................... 22
Waterside Pressure Drop (kPa)........................................................................................... 23
Pump Packages (Optional Extras)....................................................................................... 24
Sound Data 26
Measurement of Sound Data............................................................................................... 26
Sound Data.......................................................................................................................... 27
General Specification 28
Mechanical Data.................................................................................................................. 28
Electrical Data...................................................................................................................... 29
Dimensional Data 30
Dimensions.......................................................................................................................... 30
Weights................................................................................................................................ 30
Installation Data 31
Unit Lifting............................................................................................................................ 31
Positioning ........................................................................................................................... 32
Water System ...................................................................................................................... 32
Standard Recommended Installation................................................................................... 33
Pump Packages (Optional Extras)....................................................................................... 34
Electrical .............................................................................................................................. 35
Interconnecting Wiring ......................................................................................................... 35

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General Description
UNIT IDENTIFICATION
LCC
20
LCC
LogiCool Free-Cooling Chiller
20 - 40
Model Size (Expressed as Nominal Cooling in kW)
INTRODUCTION
The Airedale range of LogiCool Compact air cooled liquid chillers covers the nominal
capacity range 20kW to 40kW in 2 model sizes.
This range has been developed for high heat load requirements and is ideally suited to
Server room applications. Offering simultaneous DX Mechanical cooling and Free-
Cooling operation, the range utilises the latest technology to achieve a high level of
energy efficient operation.
As standard, the LogiCool offers modulating capacity control through the use of digital
scroll compressor technology and further increased energy efficiency with optional EC
Fans, refer to Optional Extras - Energy Saving, on page 8 for details.
Attention has been placed on maximising the unit’s cooling and energy performance while
keeping the footprint to an absolute minimum.
CE DIRECTIVE
PS and TS Values
Airedale certify that the equipment detailed in this manual conforms with the following
EC Directives:
Electromagnetic Compatibility Directive (EMC)
2014/30/EU
Low Voltage Directive (LVD)
2014/35/EU
Machinery Directive (MD)
89/392/EEC in the version
2006/42/EC
Pressure Equipment Directive (PED)
2014/68/EU
To comply with these directives appropriate national & harmonised standards have been
applied. These are listed on the Declaration of Conformity, supplied with each product.
Maximum and Minimum Operation Temperature (TS) and Pressure (PS)
Operating Temperature (TS), TS = Min -5°C to Max 120°C *
Maximum Operating Pressure (PS) PS = High Side 40.7 Barg
*Based upon the maximum machine running temperatures.
REFRIGERANT
The range has been designed and optimised for operation with ozone benign
refrigerant R410A.

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General Description
CONSTRUCTION
The base is fabricated from galvanised steel coated with epoxy baked powder paint to
ensure a durable, weatherproof construction.
Unit panels are 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).
Fully weatherproofed electrical panels are situated at one end of the unit.
Access to the water and refrigeration components is via the lower front panel.
Coil guards are fitted as standard.
A set of 4 collared eye bolts to BS4278 are supplied.
STANDARD FEATURES - ENERGY SAVING
Compressor
Scroll compressor(s) comprising:
Internal motor protection
Internal pressure relief
External discharge temperature protection
Oil sight glass
LCC20
Utilises 1 digital scroll compressor offering modulating capacity control between
20 - 100% of unit capacity.
LCC40
Utilises 1 digital scroll compressor coupled in tandem with 1 standard scroll compressor
offering modulating capacity control between 10 - 100% of unit capacity.
Energy saving digital compressors enable capacity modulation through time averaging of
the loaded and unloaded state of the compressor scroll. For further details, please refer
to Design Features & Information, on page 11.
Electronic Expansion
Valves (EEV)
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 reduced loading and low ambient
temperatures. Factory fitted, for full details refer to the Design Features & Information, on
page 10.

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General Description
STANDARD FEATURES - ENERGY SAVING
Evaporator
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 and the material is UV resistant.
A self-regulating pad heater is fitted to the single evaporator and will protect against
freeze up in ambient temperatures as low as -20°C.
Condenser
Large surface area coil(s) ideally positioned to optimise airflow and heat transfer,
manufactured from refrigeration quality copper tubes with mechanically bonded
aluminium fins.
The copper tube is internally rifled for improved heat transfer.
Free-Cooling Coil
Large surface area coil(s) ideally positioned to optimise airflow and heat transfer,
manufactured from refrigeration quality copper tubes with mechanically bonded
aluminium fins.
Spacing between condenser and free-cooling coils is provided for cleaning maintenance
along with top access holes and drain holes to the base.
Fan & Motor Assembly
Sickle bladed fan assemblies with integral long bellmouth and fingerproof grille;
incorporate external rotor ac motor technology, capable of highly accurate discreet speed
control, discharges air vertically. The fans offer maximum airflow performance while
keeping sound levels to a minimum.
Each fan is speed controllable and operates from a 3 phase electrical supply.
Energy efficient Electronically Commutated (EC) fans are also available; refer to Optional
Extras - Energy Saving, on page 8.
Head Pressure Control
3 phase head pressure controllers are fitted which modulate the fan speed to maintain a
constant condensing pressure in the DX mechanical cooling mode and afford reductions
in input power when overcooling in low ambients.
A pressure transducer is fitted to the liquid line which in turn feeds back the head
pressure to the microprocessor. The condenser fan speed can then modulate via the
controller to provide optimum control under varying ambient conditions. The head
pressure can be monitored via the display keypad.
Additional refrigeration valves are fitted to allow mechanical and free-cooling functions to
operate simultaneously in order to maximise free-cooling and minimise
energy consumption.

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General Description
STANDARD FEATURES - GENERAL
Refrigeration
Each refrigeration circuit is supplied with the following:
Full operating charge of R410A
Electronic Expansion Valve (EEV)
Liquid line ball valve
Discharge line ball valve
Liquid line filter drier
Liquid line sight glass
Low pressure switch with manual reset via microprocessor controller
High pressure switch with manual reset
Suction and liquid pressure transducers
Valves for refrigeration head pressure control
Water / Glycol
Each water glycol circuit is supplied with the following:
3 way modulating valve to control free-cooling operation
Strategically placed automatic air vents
Strategically placed drain valves
Ball valve(s) for Free-cooling coil isolation to allow for maintenance
Pressure transducer(s) across evaporator to monitor water pressure drop
Inlet water filter ball valve 20 mesh
Flushing Bypass Kit
(Standard)
Comprises:
Shut off valves
Factory fitted to protect the evaporator from clogging by sediment and to enable the
system to be purged before running.
Controls
As standard, the
microprocessor controller can provide modulating
capacity control.
Optionally, the controller is designed to provide capabilities for;
Building Management Systems
to meet all your system requirements, please confirm at time of order.
Evaporator Differential
Pressure Sensor
Facilitates low flow limiting and pressure drop monitoring via the microprocessor.
Measures the evaporator pressure drop which in turn enables the evaporator flow rate to
be calculated.

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General Description
STANDARD FEATURES - GENERAL
Electrical
Dedicated weatherproof electrical power and controls panels are situated at the front of
the unit and contain:
Separate, fully accessible, controls compartment
Circuit breakers for protection of all major unit components
Separate, permanent supply for controls/trace heating, 230V / 50Hz / 1Ph
CAUTION
A fused and isolated electrical supply of the appropriate phase, frequency and
voltage should be installed.
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, on
page 35.
Electrical terminals for external evaporator pipework trace heating (240V/500W)
are provided.
OPTIONAL EXTRAS - ENERGY SAVING
Electronic Soft Start
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.
Electronically
Commutated (EC) Fan
Motor
Sickle bladed fan assemblies with integral long bellmouth and fingerproof grille.
Incorporate external EC rotor motor technology, to provide highly accurate discreet speed
control, discharge air vertically. The fans offer maximum airflow performance while
keeping sound levels to a minimum.
Each fan incorporates on board electronics with inverter-driven DC motor control,
responding to a signal from the unit microprocessor.
For further details, please refer to Design Features & Information, on page 12.
Energy Manager
Analysis of system energy consumption can be monitored via a dedicated LCD display.
Unit parameters can be adjusted via the unit microprocessor control to affect energy
usage in line with the system need.
OPTIONAL EXTRAS - GENERAL
Corrosion Resistant
Coated Coils
In atmospheres where high corrosion is anticipated a corrosion resistant coating is applied
to the aluminium fins of either phenolic or epoxy, dependent upon size.
BMS Interface Card
Enables
controlled chillers to be interfaced with most BMS, including
Airedale’s own pCOWeb, factory fitted, please contact Airedale.
R410A Leak Detection
System
A factory calibrated and fitted leak detection system, will raise an alarm when refrigerant
gas is detected.

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General Description
OPTIONAL EXTRAS - GENERAL
Phase Rotation
Protection
A phase sequence relay is available for units containing 3 phase scroll compressors, to
prevent possible damage by running the compressor in the wrong direction.
Control Panel Low
Ambient Protection
Supplementary heating can be offered to the control panel to ensure components such
as LCD displays operate in low ambients conditions.
Remote Setpoint Adjust
Allows the chilled water setpoint to be adjusted via an external 0-10V signal.
Compressor Oil Heater
A compressor mounted sump heater is available for low temperature applications.
Flushing Bypass Kit
(Regulating)
Comprises:
Double regulating valve
Factory fitted to protect the evaporator from clogging by sediment and to enable the
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).
Internal Pump Packages
Integral pumps may be fitted, standard or larger sizes selected to suit installed system
requirements. The following configurations are available:
Single Head Pump
Factory fitted with electrical switchgear and isolating valve.
Single Head Run/Standby
Pumps
Factory fitted dual pumps with filter ball valves on the inlet and outlet, the valves can be
maintained without interrupting chiller flow. Non-return valves are fitted to 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.
Refer to Performance Data, on page 24 and Installation Data, on page 34 for further details.
Expansion Vessel
An integral expansion vessel can be factory fitted.
All vessels and pipework are trace heated.
Commissioning
Airedale Service provides a full commissioning service carried out by professionally
trained, industry experienced engineers. For a competitive quotation, please contact
Airedale Customer Services.
Chillerguard®
UK Mainland
In addition to commissioning, a 24 hour, 7 days a week on-call service is available
throughout the year to UK mainland sites. 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.

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Design Features & Information
ELECTRONIC EXPANSION VALVES (EEV)
Thermostatic Expansion
Valves (TEV)
Whilst offering versatile control at the full design duty of the unit, standard TEVs do not
automatically optimise themselves to all operating conditions. Therefore, if the
refrigeration system 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 (EEV)
Using an EEV allows for good refrigeration control whilst operating at part load and lower
ambient conditions with a reduced condensing pressure. By fitting an EEV and adjusting
the head pressure control setting an increase in the system EER (Energy Efficiency
Ratio) of up to 30% can typically be seen. 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 its 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 down to 10% of the valves rated capacity.
Bubble
Dew
1
1
3
4
2
1 Compression
2 Condensation
3 Expansion
4 Evaporation
Reduced Condensing
Pressure
Pressure (Bara)
Evaporating Pressure
Increase in
Cooling Duty
Enthalpy (kJ/kg)
Reduction in
Compressor
Input Power
Key
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).

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Design Features & Information
DIGITAL SCROLL COMPRESSORS
General Description
Digital scroll compressor technology offers compressor capacity modulation from 20% to
100% achieved by the use of an externally integrated long life electronically controlled
solenoid valve which loads and unloads the compressor scroll based on a 20
second cycle.
The solenoid valve uses suction and discharge pressures through a modulation chamber
to cause a spring loaded piston attached to the top scroll to fall down at high pressure and
move up at low. The moving of the piston separates the scrolls and results in no
compression of refrigerant.
As the digital compressor is always operating at either 100% or 0% the mass flow of
refrigerant through the system is always high, simplifying component selection and pipe
work design to guarantee oil return.
Energy Efficiency
The digitally modulated solenoid achieves capacity modulation of 20% to 100% by varying
the loaded or unloaded compressor cycle time and averaging the sum of the loaded and
unloaded state. The digital scroll compressor operates in an unloaded state for a
proportion of the 20 second cycle time; as a result, the load on the compressor is greatly
reduced as refrigerant is not drawn. Consequently the energy consumed at partial load
condition is only a percentage of that consumed during full load condition, ie:
(Loaded Time x 100%) + (Unloaded Time x 10%)
= Average Power
(Loaded Time + Unloaded Time)
Operation
The following examples illustrate the flexibility of the digital compressor loading stages
within the 20 second cycle time:
Example A
Where: Solenoid Energised = 10 seconds Loaded Time
Solenoid De-energised = 10 seconds Unloaded Time
(10 x 100%) + (10 x 0%)
= 50%
20
10 Secs
10 Secs
100% Capacity
0% Capacity
10 Secs
10 Secs
20 Secs
Example B
Where: Solenoid Energised = 5 seconds Loaded Time
Solenoid De-energised = 15 seconds Unloaded Time
(15 x 100%) + (5 x 0%)
= 75%
20
5 Secs
5 Secs
15 Secs
15 Secs
20 Secs

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Design Features & Information
DIGITAL SCROLL COMPRESSORS
Control & Monitoring
The systems superheat is controlled by a dedicated microprocessor and digital
compressor performance is monitored via the AireTronix controller display.
CAUTION
The digital scroll compressor is always operating at either 100% or 0% mass flow.
When inspecting the refrigerant system with gauges, this is evident by pulsing of
the system pressures. Therefore, all pressure measurements MUST be taken when
the digital scroll compressor is compressing refrigerant (solenoid de-energised).
ELECTRONICALLY
COMMUTATED (EC)
FAN MOTOR OPTION
EC motors are DC motors with integrated ac to DC conversion; this gives the flexibility of
connecting to ac mains with the efficiency and simple speed control of a DC motor. The
EC fan offers significant power reduction in comparison with equivalent ac fan at both full
and modulated fan speeds. The inbuilt EC fan control module allows for fan speed
modulation from 0-100%, a standard ac fans modulating range is typically 40-100% of full
fan speed.
The EC fan offers superior energy efficiency at full and reduced fan speed compared to
the equivalent ac fan motor.
PIPEWORK DESIGN
The unit refrigeration piping has been specifically designed to ensure the absolute
minimum pressure loss. Sizing and layout of pipes is such that good oil circulation is
achieved and neither performance nor efficiency is compromised.

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Design Features & Information
MINIMUM SYSTEM WATER VOLUME CALCULATIONS
(DX Mechanical Cooling Mode Requirements)
General
System fluid 20% ethylene glycol / 80% water.
METHOD 1
Where the system permanent heat load is known and the preferred method:
Vm (l) =
Water Flow Rate
(l/min)
x
Minimum
Compressor Run
Time (min)
x
Chiller Loading
Factor (1)
Vm (l) =
Output x 60
x 2 x
MT x Output
x 1.2
SHC x ΔT
PHL
(1)
0.1 - 1.00
Where:
Output = (kW) Cooling Duty, Output kW, refer to Performance Data, on page 19
SHC = (kJ/kg°C) Specific Heat Capacity, 3.9 based on 20% ethylene glycol concentration.
ΔT = (°C) Difference of Entering Water and Leaving Water temperature
MT = Minimum Turndown
PHL = (kW) Customer Permanent Heat Load
Example
Model Ref. = LCC40
Ambient: = 35°C
Fluid = 20% Ethylene Glycol
Inlet Fluid Temp. = 7°C
Outlet Fluid Temp. = 12°C (5°C  T)
Customer Permanent Head Load = 20.0 kW
Output at given conditions = 33.7 kW
Vm =
33.7 x 60
x 2 x
0.10 x 33.7
x 1.2
3.9 x 5
20
Vm =
41.9 L
METHOD 2
Where the system permanent heat load is unknown:
Vm (l) =
Water Flow Rate
(l/hour)
x
Minimum Turndown Ratio
x 1.2
Maximum Number of Compressor Starts (per Hour)
Vm (l) =
Output x 60
x
x 0.1
x 1.2
SHC x ΔT
10
Example
Model Ref. = LCC40
Ambient: = 35°C
Fluid = 20% Ethylene Glycol
Inlet Fluid Temp. = 7°C
Outlet Fluid Temp. = 12°C (5°C  T)
Output at given conditions = 33.7 kW
Vm =
33.7 x 3600
x
0.1
x 1.2
3.9 x 5
10
Vm =
74.7 L

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Controls Standard features
General Description
The microprocessor controller shall offer 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 shall be 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 shall be a visual alarm and the facility to adjust and display control settings
by local operator for information and control.
Display/keypad
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 LCD DISPLAY
Display content for illustration only

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Controls
STANDARD FEATURES
Unit Remote ON/OFF
Disables/Enables the chiller remotely.
Compressor Anti Cycle
Control
Automatic via the Microprocessor.
Compressor Load Limit
Limits the condensing pressure by unloading above 35 Barg.
Limits the evaporating pressure by unloading at the minimum pressure setpoint, which is
adjustable depending on system glycol content.
Pump(s) Remote
ON/OFF
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.
Compressor Hours Run
Displays hours run of each compressor.
Password Protection
The control system integrity can be maintained by restricting access with a password
PIN number.
CAUTION
IMPORTANT: To change the PIN number; please contact Airedale at time of order
with the preferred 4 digit number.
OPTIONAL FEATURES
Pump(s) Hours Run
Displays hours run of each pump.
BMS Interface Card
Enables
Controlled units to be interfaced with most BMS, factory fitted,
please contact Airedale.
A wide range of protocols can be accommodated through the use of interface devices.
Available as a standard option are: ModBus/Jbus, Carel and Trend.
For interfaces such as SNMP, LonWorks, Metasys and BACnet, please contact Airedale.
Also available is Airedale’s own supervisory plug-in BMS card pCOWEB.
Based on Ethernet TCP/IP secure technology with SNMP features.
Requires no proprietary cabling or monitoring software and supplied pre programmed
with an IP address for ease of set up.
GSM Modem Kit
Allows remote alarm monitoring by sending alarm text messages to a nominated mobile
phone, factory set.

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Controls
TEMPERATURE
CONTROL
The unit has been designed to provide the cooling load required whilst optimising energy
efficiency at all times and as such will take advantage of free cooling whenever
available. If the free cooling available cannot satisfy the required full cooling load, DX
mechanical cooling is used to supplement the output.
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
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. By monitoring the temperatures of the
return and supply water the units cooling capacity is adjusted through use of the
microprocessor controls to maintain an average temperature set point between the supply
and return temperatures.
Selection of the best application control scheme can be made via a soft switch in the
microprocessor during initial commissioning.
CAUTION
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.
FreeCooling Operation
In high ambients where free-cooling is not available the fan speed modulates in the
conventional manner to maintain a constant head pressure. Free cooling is initiated
wherever the outdoor ambient is 1°C less than the return water temperature.
When free cooling and DX (mechanical) cooling are operating simultaneously the
condenser fan speed will operate at 100% maximising free cooling.
In ambients where the free cooling coil is capable of satisfying the full cooling demand, the
condenser fans are modulated to provide the desired duty. The condenser fans are
capable of being modulated between 25-100% of airflow to maintain the supply
water temperature.
During periods where the condenser fan speed has been reduced to a minimum, the
supply water temperature will then be controlled by the 3 way valve.

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Chillers
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Controls
MONITORING
The microprocessor also monitors and displays the following measured parameters:
Supply Water Temperature
Return Water Temperature
Evaporator Inlet water temperature
Ambient Air Temperature
Suction Pressure
Liquid Pressure
Evaporator Waterside Differential Pressure
Evaporator Waterside Flow Rate (calculated)
ALARM HANDLING
The following conditions will be detected, triggering a visual alarm:
Low Supply Temperature
Mains Phase Failure / Phase Rotation
Emergency Stop (Option)
Water Flow
Pump(s) status
Individual Compressor Trip
Low Suction Pressure
High Liquid Pressure
Low Pressure Switch
Individual Compressor Overload
Isolator Status
Individual High Compressor Discharge Temperature
Volt Free Contact Non-Critical Alarm Indication
Volt Free Contact Critical Alarm Indication

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Chillers
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Performance Data
ESEER CALCULATIONS
The quoted EER figures (General Specification, on page 28) cover the performance of the
unit ONLY at the standard rating conditions of 7/12°C water, 35°C ambient. The ESEER
calculation method has been developed by Eurovent to give a single value that is a
realistic indication of the efficiency of the chiller across the whole range of operation.
The ESEER value is calculated from the unit’s performance at 20, 25, 30 and 35°C
ambient temperatures for all loading stages, and with a fixed 7°C supply temperature. All
calculations assume the system operates with 100% water.
ESEER = A.EER100% + B.EER75% + C.EER50% + D.EER25%
A, B, C and D are weighting factors 0.03, 0.33, 0.41 and 0.25.
Temperature
20°C
25°C
30°C
35°C
Capacity Requirement
25%
50%
75%
100%
Percentage of Total Hours
0.25
0.41
0.33
0.03
FSEER CALCULATIONS
(Free Cooling)
Whilst the ESEER is useful for providing a true energy efficiency of a unit’s performance
over a year it does not offer any advantages for use of free-cooling which can significantly
reduce the unit’s lifecycle power consumption.
The FSEER calculation method has been developed by Airedale to give a single value
that is a realistic indication of the efficiency of the chiller across the whole range
of operation.
The quoted Airedale FSEER figures (General Specification, on page 28) are similar to the
ESEER and includes the unit’s free cooling capacity within the calculation. All calculations
for the FSEER use water with 20% ethylene glycol content. Flow rates are kept constant
for all conditions and are determined by the operation at 7/12°C, 35°C ambient.
Free cooling capacity is included within the units EER when available. DX cooling
capacity is included within the Chillers EER when the Free-cooling available is not
sufficient to satisfy the total cooling demand.
ESEER = A.EER100% + B.EER75% + C.EER50% + D.EER25%
A, B, C and D are weighting factors 0.05, 0.25, 0.47, 0.23.
Temperature
0°C
10°C
20°C
30°C
Capacity Requirement
0.25
0.5
0.75
1
Percentage of Total Hours
0.23
0.47
0.25
0.05

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LOGICOOL™
Chillers
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Technical Manual : 6521355 V1.14.0 11/2016
Performance Data
CAPACITY DATA - DX (MECHANICAL) COOLING
Cooling Duty
Ambient
Entering / Leaving
Water Temperature °C
25°C
30°C
35°C
40°C
Output kW
Input kW
Output kW
Input kW
Output kW
Input kW
Output kW
Input kW
LCC20
10 / 5
18.7
6.0
18.1
6.4
17.1
7.0
16.2
7.5
11 / 6
19.3
6.0
18.7
6.4
17.7
7.0
16.8
7.6
12 / 7
19.9
6.0
19.2
6.4
18.2
7.1
17.3
7.6
15 / 10
21.8
6.1
21.0
6.6
19.8
7.2
18.8
7.7
17 / 12
23.2
6.1
22.2
6.6
21.0
7.2
19.9
7.8
LCC40
10 / 5
35.6
11.8
33.6
13.0
31.8
14.2
29.9
15.3
11 / 6
36.6
11.9
34.7
13.1
32.8
14.3
30.9
15.4
12 / 7
37.7
12.0
35.7
13.2
33.7
14.4
31.8
15.5
15 / 10
40.9
12.4
38.8
13.5
36.7
14.7
34.7
15.9
17 / 12
43.2
12.6
40.9
13.8
38.8
14.9
36.7
16.1
1
Cooling Duty based on 20% Ethylene Glycol concentration. For alternative concentrations, refer to Glycol Data, on page 22.
2
Output kW = DX (Mechanical) Cooling duty.
3
Input kW = compressor + fan input power.
4
Unit water flow rate (l/s)
=
Output kW
3.9 x T
5
Interpolate for water temperatures between those quoted, do not extrapolate.
6
For conditions outside those quoted, please refer to Airedale.
OPERATING LIMITS
(For 20% Ethylene Glycol)
Standard Unit
Minimum Ambient Air DB °C
-20°C
Maximum Ambient Air DB °C
Refer to Capacity Data - DX (Mechanical) Cooling, above
Minimum Leaving Water Temperature °C
+5°C
Maximum Return Water Temperature °C
+20°C
Minimum / Maximum ΔT
4°C / 8°C
1
For conditions outside those quoted, please refer to Airedale.
All performance data is supplied in accordance with BS EN 14511-1:2013

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Performance Data
CAPACITY DATA - FREE COOLING
Determine the Free Cooling capacity as follows using the graphs provided:
Example
Model Ref. = LCC40
Ambient: = 35°C
Fluid = 20% Ethylene Glycol
Inlet Fluid Temp. = 7°C
Outlet Fluid Temp. = 12°C (5°C  T)
Customer Permanent Head Load = 20 kW
Calculate Waterflow l/s
Flow =
Output
3.9 x ΔT
Flow =
33.7
3.9 x 5
Flow =
1.73 l/s
Select Free Cooling Curve
ΔTFC (°C)=
Return Water Temp - Ambient Temp
ΔTFC (°C)=
15 - 5
ΔTFC (°C)=
10°C
Free Cooling (kW)
As plotted on graph =
30kW
Where:
Output = (kW) Cooling Duty, Output kW, refer to Capacity Data - DX (Mechanical) Cooling,
on page 19
ΔT = (°C) Difference of Entering Water and Leaving Water temperature
ΔTFC = (°C) Difference of Leaving Water temperature and Ambient temperature
All performance data is supplied in accordance with BS EN 14511-1:2013