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EasiCool 6kW 64kW
User Manual
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Airedale EasiCool 6kW 64kW User Manual

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EasiCool™ EZRE
Downow and Upow - Precision Air Conditioning
Direct Expansion
6kW - 60kW
Technical Manual
EasiCool™ Precision Air Conditioning
Warranty, Commissioning & Maintenance
As standard, Airedale guarantees all non consumable parts only for a period of 12 months, variations tailored to suit product and application are also available; please contact Airedale for full terms and details.
Introduction
To further protect your investment in Airedale products, Airedale 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 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.
For effective prevention of such risk it is necessary that the equipment is maintained in accordance with Airedale recommendations.
SafeCool
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.
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: enquiries@airedale.com or telephone:
UK Sales Enquiries + 44 (0) 113 239 1000 enquiries@airedale.com International Enquiries + 44 (0) 113 239 1000 enquiries@airedale.com Spares Hot Line + 44 (0) 113 238 7878 spares@airedale.com Airedale Service + 44 (0) 113 239 1000 service@airedale.com Technical Support + 44 (0) 113 239 1000 tech.support@airedale.com Training Enquiries + 44 (0) 113 239 1000 marketing@airedale.com
For information, visit us at our Web Site: www.airedale.com
Airedale 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. Airedale 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 Airedale 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 Airedale Ltd. © 2012 Airedale International Air Conditioning Limited. All rights reserved. Printed in the UK.
2
EasiCool™Precision Air Conditioning
Health and Safety
IMPORTANT
The information contained in this manual is critical to the correct operation and maintenance of the unit and should be read by all persons responsible for the installation, commissioning and maintenance of the Airedale unit.
Safety
The equipment has been designed and manufactured to meet international safety standards but, like any mechanical/ electrical equipment, care must be taken if you are to obtain the best results.
CAUTION
When working with any air conditioning units ensure that the electrical isolator is switched off prior to servicing or repair work, and that there is no power to any part of the equipment.
Also ensure that there are no other power feeds to the unit such as re alarm circuits, BMS circuits etc.
Electrical installation commissioning and maintenance work on this equipment should be undertaken by competent and trained personnel in accordance with local relevant standards and codes of practice.
Introduction
The refrigerant used in this range of products is classied under the COSHH regulations as an irritant, with set Workplace Exposure Levels (WEL) for consideration if this plant is installed in conned or poorly ventilated areas.
A full hazard data sheet in accordance with COSHH regulations is available should this be required.
Protective Personal Equipment
Airedale recommends that personal protective equipment is used whilst installing, maintaining and commissioning equipment.
Refrigerant Warning
The Airedale Easicool unit uses R410A refrigerant which requires careful attention to proper storage and handling procedures.
Use only manifold gauge sets designed for use with R410A refrigerant. Use only refrigerant recovery units and cylinders designed for high pressure refrigerants.
R410A must only be charged in the liquid state to ensure correct blend makeup.
The refrigerant must be stored in a clean, dry area away from sunlight. The refrigerant must never be stored above 50°C.
Global Warming Potential
R410A = 1900
EN378-1 :2008 (100 year life)
Manual Handling
Some operations when servicing or maintaining the unit may require additional assistance with regard to manual handling. This requirement is down to the discretion of the engineer.
Remember do not perform a lift that exceeds your ability.
3
EasiCool™ Precision Air Conditioning
Environmental Considerations
Freeze Protection
Airedale recommends the following actions to help protect the unit during low temperature operation. This also includes
Introduction
the units subject to low ambient temperatures.
Units with supply water temperatures below +5°C
Glycol is recommended when a supply water temperature of +5°C or below is required or when static water can be exposed to freezing temperatures.
Units subject to ambient temperatures lower than 0°C
Glycol of an appropriate concentration concentration is capable of protection at least 3°C lower than ambient.
Water / glycol solution is constantly circulated through all waterside pipe work and coils to avoid static water from freezing.
Ensure that pumps are started and running even during shut down periods, when the ambient is within 3°C of the solution freeze point
(1)
Refer to your glycol supplier for details
(1)
(i.e. if the solution freezes at 0°C, the pump must be operating at 3°C ambient).
(1)
is used within the system to ensure adequate protection. Please ensure that the
Environmental Policy
It is our policy to:
• Take a proactive approach to resolve environmental issues and ensure compliance with regulatory requirements.
• Train personnel in sound environmental practices.
• Pursue opportunities to conserve resources, prevent pollution and eliminate waste.
• Manufacture products in a responsible manner with minimum impact on the environment.
• Reduce our use of chemicals and minimise their release to the environment.
• Measure, control and verify environmental performance through internal and external audits.
• Continually improve our environmental performance.
CE Directive
Airedale certify that the equipment detailed in this manual conforms with the following EC Directives:
Electromagnetic Compatibility Directive (EMC) 2004/108/EC Low Voltage Directive (LVD) 2006/95/EC Machinery Directive (MD) 89/392/EEC version 2006/42/EC Pressure Equipment Directive (PED) 97/23/EC
To comply with these directives appropriate national & harmonised standards have been applied. These are listed on the Declaration of Conformity, supplied with each product.
4
EasiCool™Precision Air Conditioning
Contents
Warranty, Commissioning & Maintenance 2
Customer Services 2
Health and Safety 3
Manual Handling 3
Environmental Considerations 4
Freeze Protection 4
Environmental Policy 4
Speciers Guide 7
Nomenclature 7
Introduction 7
Unit Overview 8
Construction 9
Refrigeration Components 10
Airow Components 15
Electrical Components 18
Heating and Humidication 19
Humidication 21
Controls 22
General Features 27
Sound Measurement Method 30
Dimensional & Installation Data 32
Dimensions 32
Positioning 37
Minimum Unit Clearances 38
Weights 40
Refrigeration Pipework 42
Refrigerant Charging Guide 43
Packaged Unit Pre-Charged Refrigerant Volumes 45
Oil Charging Guide 48
Refrigerant Pipesizing Guide - X Type Downow 49
Ethylene Glycol Correction Factors - WX Models 51
System Pipework Schematic 52
Interconnecting Wiring 54
Introduction
5
EasiCool™ Precision Air Conditioning
Technical Data Downow Units X Type 56
Performance Data 56
Noise Data 60
DF6X - DF10X 62
Introduction
DF13X - DF17X 64
DF20X2 - DF26X2 66
DF28X - DF31X 68
DF35X - DF45X 70
DF50X2 - DF60X2 72
Hydronic Data Low Pressure Hot Water 74
Technical Data Upow Units X Type 76
Performance Data Standard Condenser 76
Noise Data 80
V6X - V10X 82
V13X - V17X 84
V20X2 - V26X2 86
V28X- V31X2 88
V35X - V45X2 90
V50X2 - V60X2 92
Hydronic Data Low Pressure Hot Water 94
Technical Data Downow Units WX Type 96
Performance Data 96
Noise Data 98
DF6WX - DF10WX 100
DF13WX - DF17WX 102
DF20WX2 - DF26WX2 104
DF28WX - DF31WX 106
DF35WX - DF45WX 108
DF50WX2 - DF60WX2 110
Hydronic Data Condenser Waterside Pressure Drop 112
Hydronic Data Low Pressure Hot Water 113
Technical Data Upow Units WX Type 114
Performance Data 114
Noise Data 116
V6WX - V10WX 118
V13WX - V17WX 120
V20WX2 - V26WX 122
V28WX - V31WX2 124
V35WX - V45WX 126
V50WX2 - V60WX2 128
Hydronic Data Condenser Waterside Pressure Drop 130
Hydronic Data Low Pressure Hot Water 131
6
Speciers Guide
Nomenclature
EasiCool™Precision Air Conditioning
Introduction
Example
DF
V
60
X
WX
CW
EZE EasiCool R407C EZRE
0 1 2
Downflow Upflow
Nominal Cooling Capacity kW
DX Air Cooled
DX Water Cooled
Chilled Water Cooling
EasiCool R410A
400V / 3PH / N / 50Hz 380V / 3PH / N / 60Hz 220V / 3PH / 60Hz
DF 60 X2
EZRE
0
Introduction
Designed to provide environmental Precision Air Conditioning for applications such as Telecommunication Facilities, Computer Rooms, Data Centres, Clean Rooms and laboratories.
The EasiCool range comprises of:­38 models as direct expansion air cooled and 38 models as water cooled (Covered in this document) (-0 range). 34 models as Single circuit chilled water. (Seperate document).(-0, -1 and -2 range) 23 Models as direct expansion air cooled and 23 models as water cooled (Seperate document ) (-1 range) 36 Models as direct expansion air cooled and 36 models as water cooled (Seperate document ) (-2 range)
Full function units provide full control of temperature, humidication, de-humidication, heating and ltration.
The modular design of the EasiCool allows grouping of differing model types and capacities to be installed side by side. The exibility of this type of installation provides for multi-circuit functionality.
A full range of air cooled condensers is available with the direct expansion indoor units to provide a matched system with optional performance upgrade.
Also available is a full range of Airedale water chillers to complement the chilled water indoor units.
The range has been designed and optimised for operation with ozone benign refrigerant R410A.
7
EasiCool™ Precision Air Conditioning
Unit Overview
Downow
Introduction
Cooling Coil
Air Filtration
Control Panel
Heating
●Electric
●Low Pressure Hot Water
●Hot Gas
Fan Motor Assembly
Upow
Fan Motor Assembly
Humidification
Scroll Compressors
Control Panel
Cooling Coil
Air Filtration
Scroll Compressors
Humidification
8
EasiCool™Precision Air Conditioning
Construction
The cabinet comprises an black painted aluminium frame with black aluminium corners and removable galvanised sheet steel panels. The unit panels are manufactured from galvanised sheet steel coated with epoxy baked powder paint to provide a durable nish. Standard unit colour is Black Grey (RAL 7021). Optional Light Grey (RAL 7035)
Cabinets are lined internally with re resistant foam (UL94 V0) thermal and acoustic insulation:
• 30mm deep for removable panels
• 12mm deep for remaining internal surfaces The cabinet doors are full height, hinged and key lock secured. Hinge arrangement allows exible door opening/removal for improved access.
Rubberised door seals reduce sound breakout and eradicate leakage.
Simple bolt on type doors are available as a cost effective option.
Unit design incorporates a series of M6 xings to the top and bottom face for connecting to customer ductwork, please contact Airedale for further details.
Sizes 6 - 26 Dependent upon model type, components such as the expansion valve, compressor, humidier and sight glass are contained within an acoustically lined enclosure to provide both ease of maintenance and to minimise sound emission.
Introduction
9
EasiCool™ Precision Air Conditioning
Refrigeration Components
Introduction
Electronic Expansion Valve Scroll Compressor
System Conguration
Downow Upow
X Type WX Type X Type WX Type
Efcient Fixed Speed Scroll Compressor
Evaporator Coil
Refrigeration Sight Glass
Oil Separator
Liquid Line Solenoid Valve
Refrigerant Pump down
Refrigeration
Hot Gas Reheat
Suction Throttle Valve
BPHE Condenser
Thermostatic Expansion Valves (TEV)
Electronic expansion Valves (EEV)
● ● ● ●
● ● ● ●
● ● ● ● ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ – ○ – ○ ○ ○ ○ ○ ● ○ ●
● ● ● ● ○ ○ ○ ○
10
●
Standard Feature ○ Optional Feature – Not Available
Evaporator
Large surface area coil(s) ideally positioned to optimise airow and heat transfer, manufactured from refrigeration quality copper tube with mechanically bonded aluminium ns.
The copper tube is internally ried for improved heat transfer.
Fins are coated with a non-stick acrylic lm (hydrophilic) which provides additional corrosion protection and efcient surface water removal for improved performance.
The cooling coil is mounted over a full width stainless steel condensate tray.
Factory pressure tested to 45 Barg.
X Models Only Sweat copper pipe for brazed connection as standard.
Compressor
Compressor(s) are mounted on the base via the use of vibration isolators.
Each compressor is designed for use with R410A refrigerant.
X X2 WX WX2
Thermal Protection
Single Compressor
Tandem Compressors
●
Standard Feature ○ Optional Feature – Not Available
● ● ● ●
● – ● – – ● – ●
Tandem Compressors
Comprising of 2 scroll type compressors linked together by refrigerant pipework to one common circuit.
Tandem compressors provide variable control of the system performance by activating individual compressors as required. Multiple steps of unloading allow external load demands to be met with greater precision, eliminating unnecessary temperature and humidity variations. Consequently, system efciency and reliability are much improved by extending major component working hours.
EasiCool™Precision Air Conditioning
Introduction
X and WX Models
Utilise a single hermetic scroll compressor tted as standard with:
• Thermal motor protection internal or external (dependent upon model size)
• High temperature discharge protection
X2 and WX2 Models
Utilise a tandem hermetic scroll compressor set, to provide 2 stages of control, tted as standard with:
• Thermal motor protection internal or external (dependent upon model size)
• High temperature discharge protection
• Sight glass on common equalisation line.
Refrigeration
Each refrigeration circuit features as standard: X Type
• Externally Equalised Thermostatic
Expansion Valve (TEV)
• Sight Glass
• Head Pressure Control
• Filter Drier
WX Type
• Externally equalised thermostatic expansion valve (TEV)
• Sight Glass
• Head Pressure Control
• Filter Drier
• Low Pressure Switch
• High Pressure Switch
• Liquid Line Pressure Transducer
• Full operating charge of R410A
• Bleed valve
• Binder points
• Low Pressure Switch
• High pressure Switch
• Liquid Line Pressure Transducer
• Holding Charge of Inert Gas
11
EasiCool™ Precision Air Conditioning
Head Pressure Control - Intelligent Modulation
(X Models) The system is tted with a voltage regulating fan speed controller which allows set point adjustment and system monitoring via the indoor unit microprocessor controller.
Introduction
A pressure transducer is tted 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.
Units tted with thermostatic expansion valves (TEV) have the head pressure factory set to 26 Barg (377 psig).
Units tted with optional electronic expansion valves (EEV) have the head pressure factory set to 22 Barg (319 psig).
The head pressure can be monitored via the display keypad.
Low Noise Feature for Condenser Fan
(X Models) Specically designed for night time operation as optimum low noise levels are achieved with reduced ambient temperature and room loads, this feature is also ideal for residential and other outdoor noise critical applications.
Initiated by setting the microprocessor programmable time clock, the head pressure set point changes from the standard 26 barg (377 psig) (TEV) or 22 barg (319 psig) (optional EEV) to 34 barg (493 psig), reducing the outdoor unit fan speed and corresponding operating sound levels.
This feature is enabled by the inclusion of an optional clock card within the microprocessor.
Head Pressure Control -Intelligent Modulation
(WX Models) A 3 way regulating valve, electronically actuated via the microprocessor, utilises a liquid line pressure transducer to measure and adjust head pressure. The valve will allow cooling water to ow to the condenser, to bypass the condenser, or to allow water ow to both condenser and by-pass line in order to maintain correct refrigerant head pressure.
The head pressure can be monitored via the display keypad.
12
EasiCool™Precision Air Conditioning
1
2
Hot Gas Re-Heat (HGRH)
(X Models) The HGRH system consists of a heating coil and solenoid valve(s) and can be tted to units with humidication selected.
The microprocessor monitors the temperature and humidity setpoints and initiates HGRH to provide optimum system efciency. HGRH may be tted instead of electric heating or low pressure hot water.
During dehumidication, the hot gas re-heat coil re-heats the cooled air from the evaporator coil using hot gas from the discharge line to maintain the room setpoint. Normally reheating of the air during dehumidication is performed by electric heating which requires additional power input. By utilising the available hot gas, the HGRH option does not require additional power input and is therefore far more energy efcient than electric heating.
Average Energy Input Comparison HGRH vs Electric Heat
Electric Heat Energy Input
Comparable HGRH Energy Input
Introduction
Suction Throttle Valve
The valve can be selected for units tted with EEVs. An electrically operated suction throttle valve can be tted to provide accurate capacity control from 50% to 100% depending on the room load. Precise temperature control is obtained as a result of modulating the refrigerant ow in the evaporator by throttling the valve on the suction line.
100
90
80
70
60
50
40
Capacity (%)
30
20
10
Maximum
Minimum
0
Fully Closed Fully Open
EER
1 Capacity @ 24°C / 45% RH return air conditions 2 EER @ 24°C / 45% RH return air conditions
13
EasiCool™ Precision Air Conditioning
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 signicant energy savings particularly at reduced loading and low ambient
Introduction
temperatures.
EEV step position, superheat setpoint, head pressure set point and other features can be viewed and adjusted via the microprocessor display.
Whilst offering versatile control at the full design duty of the unit, 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 articially high condensing pressure is normal in conventional systems.
Using an EEV allows for good refrigeration control whilst operating at part load and lower ambient conditions with a reduced condensing pressure. By tting an EEV and adjusting the head pressure control setting an increase in the system EER (Energy Efciency Ratio) of up to 30% can typically be seen. The Mollier diagram shown below helps to illustrate how this increase in efciency is achieved.
EEV’s differ to normal thermostatic expansion valves in their ability to maintain control of refrigerant ow 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 down to 10% of the valves rated capacity.
Reduced Condensing Pressure
Presssure
Bara
Evaporating Pressure
Heat of Rejection
2
3
4
1
Thermostatic Expansion Valve (1)
Electronic Expansion Valve (2)
14
Cooling Duty
Enthalpy kJ/kgIncrease in
1 Compression 2 Condensation
Reduction in Compressor Input Power
3 Expansion 4 Evaporation
Key: (1) Cooling Cycle @ 22°C ambient with a conventional TEV tted. (2) Cooling cycle @ 22°C ambient, demonstrating a typical EEV condensing temperature taking full advantage of lower ambient air temperatures (below 35°C).
Airow Components
EasiCool™Precision Air Conditioning
Introduction
Pleated Disposable Panel Filter
EC Fans 6 - 26
AC Fans 6 - 26
AC Fans 28 - 60
EC Fans 28 - 60
AC Larger Fan Motor**
2 way Discharge Grille
3 Way Discharge Grille
Airow Components
Standard Feature ○ Optional Feature – Not Available
●
Return Air Grille
G4 Return Door Air Filter
High efciency Filtration with pre-lter G3+F6
EC Direct Drive Backward Curve Fan
EC Direct Drive Forward Curve Fan
System Conguration
Downow Upow
X Type WX Type X Type WX Type
● ● ● ● ○ ○ ○ ○
● ● ● ● ○ ○ ○ ○ ○ ○ ○ ○
– – ○ ○ – – ○ ○ – – ● ●
○ ○ ○ ○ ○ ○ ○ ○
** Model Dependant on selected units with AC fans as standard.
15
EasiCool™ Precision Air Conditioning
EC Motor
Sizes 6 - 26
(Direct Drive)
Introduction
Units utilise a double inlet, forward curved, direct drive centrifugal fan with integral shaft mounted EC motor which is statically and dynamically balanced for quiet operation. Impellers and casings are galvanised for protection against corrosion. The integral motor runs in sealed for life, lubricated bearings and features automatic thermal overload protection.
Fan speed, airow and external static pressure are controlled by the use of a 0-10 Volts signal via the microprocessor display keypad which offers easy on site adjustment.
Adjustable by increments of 1% within + / - 10% of the set point.
Sizes 6 - 17
Units have a single fan and motor assembly.
Sizes 20 - 26
Units have 2 fan and motor assemblies.
Sizes 28 - 60
(Belt & Pulley) Double inlet forward curved centrifugal fan(s) with galvanised impellers and casing.
Mild steel fan shaft with lifetime lubricated ball bearings.
Fan and drive assembly design is based on a minimum of 25,000 hours life expectancy.
Each fan assembly is separately driven by a high efciency air cooled AC motor through a pulley and ‘V’ belt drive. The complete motor assembly is mounted on a fully adjustable platform for belt tensioning. Motor specication conforms to Efciency Class 1(IE2).
With integrated plummer block bearings (4kW motors only).
Sizes 28 - 45
Units have a single fan and motor assembly.
Sizes 50 - 60
Units have 2 fan and motor assemblies.
Large AC fan motor options available on most sizes, refer to Mechanical Data.
Energy efcient Electronically Commutated (EC) fans are also available.
Airow Switch
An adjustable differential pressure switch activates a visual alarm at the status panel and breaks the power supply in the event of a fan or motor failure.
Filters
Pleated disposable panel lters in a rigid frame. Conform to BS EN 779-G4.
16
Access and removal from unit front.
As standard the microprocessor provides an alarm following a preset run time limit being exceeded,
EasiCool™Precision Air Conditioning
Fan & Motor Assembly Optional Features
Larger & Next Larger Fan Motor
(AC Fan Motors Only Sizes 28 to 60) For applications where higher static air pressures are required, a larger fan and motor assembly size can be tted to replace the standard assembly and is available on most models.
Electronically Commutated (EC) Fan Motor
Sizes 6 - 60
Backward curved impellers, direct drive centrifugal fan assemblies with integral rotor mounted motor which is statically and dynamically balanced for quiet operation.
Designed for high corrosion resistance, the impellers are laser welded aluminium with a galvanised rotor and die cast aluminium EC power module.
EC motors incorporate integrated electronics to convert AC power to DC for efcient and accurate speed control and are adjustable via the microprocessor display keypad.
The fans offer maximum airow performance while keeping sound levels to a minimum.
Introduction
The fans are mounted within a oorstand complete with adjustable feet, optional legs and oor tile lip. (models DF28 - 60 only)
EC motors are DC motors with integrated AC to DC conversion; this gives the exibility of connecting to AC mains with the efciency and simple speed control of a DC motor. The EC fan offers signicant 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 15-100%, a standard AC fans modulating range is typically 40 to 100% of full fan speed.
The EC fan presents superior energy efciency at full and reduced fan speed compared to the equivalent AC fan motor.
Standard voltage regulated (VR) fan speed controllers offer a linear response. By comparison the EC fan is adjusted on demand via the unit microprocessor with precision, offering substantial energy savings.
The following illustration shows a comparison of the typical power input required by each method.
Input Power
Airflow
Key
EC (Electronically Commutated) Fan Speed Control
Regulated (VR) Fan Speed Control
17
EasiCool™ Precision Air Conditioning
Electrical Components
Introduction
System Conguration
Features
Electrical Switch Gear
Door Interlocking Electric Isolator
Energy Manager
Electrical
●
Standard Feature ○ Optional Feature – Not Available
Phase Rotation Monitoring
Thyristor Controlled Electric Heat
Downow Upow
X Type WX Type X Type WX Type
● ● ● ●
● ● ● ● ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
Electrical
The control panel contains the necessary compressor starter contactors, transformer, sub circuit protection, volt free contacts for a common alarm and mains and inter-connecting terminals. The panel is situated within the cabinet and can be removed for essential maintenance of other components within the unit. The electrical control panels are wired to the latest European standards and codes of practice.
Sub Fusing
The electrical mains supply for the system’s outdoor unit is supplied via the indoor unit. MCBs are tted for protection.
Main Electric Isolator
To ensure complete unit isolation of the electrical panel during adjustment and maintenance a door interlocking isolator is provided as standard.
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.
Phase Rotation Protection
A phase sequence relay shall be avaliable for units containing 3 phase scroll compressors, to prevent possible damage by running the compressor the wrong direction.
CAUTION
If Phase Rotation Protection and an Energy Manager unit are both required, the Energy Manager will require the addition of a Field Card, please contact Airedale.
18
Heating and Humidication
Features
Electric Heat
Hot gas Reheat
Heating
Low Pressure Hot Water
EasiCool™Precision Air Conditioning
Introduction
System Conguration
Downow Upow
X Type WX Type X Type WX Type
○ ○ ○ ○ ○ – ○ – ○ ○ ○ ○
Humidier
Hot Water Condensate Pump
Low Conductivity (Soft Water) Bottle
Standard Conductivity (Moderate/Hard Water) Bottle
Humidication
Standard Feature ○ Optional Feature – Not Available
●
Heating
Hot Gas Re-Heat (HGRH)
(X Models) Refer to Hot Gas Re-Heat (HGRH). Or
Electric Heating
Multi-stage nned electric heating elements complete with auto and manual reset overheat cut-out protection.
Electric Heating Thyristor Control
Offers precision control between 0 - 100% via the microprocessor.
Or
High Conductivity (Very Hard Water) Bottle
Cleanable Humidier Bottle
○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
Low Pressure Hot Water
A low pressure hot water coil constructed of refrigeration quality copper tube and mechanically bonded aluminium ns can be factory tted.
Frost protection is tted to prevent freezing of the low pressure hot water coil assembly. Proportional heating control is provided by a factory tted 3 port, raise/lower type, modulating valve.
Access to the Right hand side of the unit is required to set up the regulating valve
19
EasiCool™ Precision Air Conditioning
Humidier - Intelligent Modulation
Humidication is provided by an electrode boiler. The sealed humidier design ensures that only clean sterile steam is supplied to the conditioned area and corrosive salts and minerals are held in the disposable bottle. The steam is distributed through a sparge pipe tted to the coil assembly.
Introduction
Featuring modulating capacity output control as standard, the system provides continuous modulation of steam output in response to a proportional control signal. The output control range is 20%-100% of the humidier rated value and is designed to give an approximate steam output of +/- 3% at 25°C at the sensor, thus ensuring precise control of the conditioned space.
The cylinder operating life time is automatically optimised via the integrated water conductivity sensor, which combined with the controls monitors and regulates the water rell cycle to reduce excessive salt deposits and the progressive wear of the cylinder.
All humidier parameters and alarms are accessible and adjustable via the microprocessor display keypad unit, main features include:
• Supply water conductivity (µS/cm)
• Actual steam output (kg/h)
• Required steam output (kg/h)
• Actual current rating (A)
• Required current rating (A)
• Status mode (Start Up, Running, Filling, Draining)
Water Conductivity & Cylinder Type Conductivity is a measure of the ability of water to pass an electric current, measured in micro Siemens / centimetre (µS/cm). 3 different cylinders are available which correspond to the supply water conductivity.
Matching the correct cylinder type with the conductivity of the supply water ensures optimum performance and increases the life span of the cylinder.
1 Low Conductivity (Soft Water) 100 to 350 µS/cm 2 Standard Conductivity (Moderate/Hard Water) 350 to 750 µS/cm 3 High Conductivity (Very Hard Water) 750 to 1250 µS/cm
As standard the humidier is tted with the standard conductivity cylinder which covers the majority of water supplies. Where the water conductivity is known, please specify at order. For further details please contact Airedale.
CAUTION
The supply water pressure to the humidier assembly must be between 1 - 8 barg.
20
EasiCool™Precision Air Conditioning
Humidication
Control Principles
In a humidier with electrodes, steam shall be produced by passing a current between electrode plates to generate heat. The higher the current being passed between the electrodes, the greater the quantity of steam that is produced. To modulate the rate of steam production, this system shall vary the level of water within the cylinder, thereby increasing the immersion level of the electrodes and the current being passed between them. The more conducting area that is available to pass current between the electrodes, the larger the amount of steam that shall be produced.
Modulated by the controller, the water level is varied so that the level of steam being produced ensures that the room humidity set-point is continually maintained within a tight tolerance.
Optimised Lifetime
The life span of the Airedale humidication system shall be optimised by the inclusion of a water conductivity sensor into the bottle feed. This sensor shal determine the conductivity level of the supply water and by using an algorithm embedded in the software, determines the frequency that the bottle should be drained.
Example: (Optimised Lifetime with High Water Conductivity Supply) As liquid water is boiled off into steam, mineral deposits are left in solution increasing the conductivity of the water. To counter this, the intelligent software increases the frequency of drain meaning that the replenishing supply water keeps the concentration of minerals diluted. By maintaining an acceptable mineral concentration, the bottle life span is maximised.
Introduction
De-humidication
(With Electric Heating and Humidication only) Controlled by the microprocessor the de-humidication feature reduces fan speeds by 20% (adjustable). The reduction of fan speed increases de-humidication which means that the time taken to reduce the room humidity to the required level is drastically decreased, along with the energy required to do so.
The return temperature is monitored during de-humidication to ensure that the temperature does not fall to a critical level. If the temperature reaches the low limit de-humidication is cancelled until the return air temperature increases.
21
EasiCool™ Precision Air Conditioning
Controls
Introduction
System Conguration
Downow Upow
X Type WX Type X Type WX Type
Microprocessor Control
Graphical Display
Filter Change Monitoring
Touch Screen Display
Controls
Dynamic Air Volume Control
Water Detection
Fire / Smoke Detection
Refrigerant Leak Detection
● Standard Feature ○ Optional Feature – Not Available
● ● ● ●
● ● ● ● ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
Units are tted with the microprocessor controller which offers powerful analogue and digital control to meet a wide range of monitoring and control requirements. Includes a communication port plus networking and BMS connections. An 8 x 22 character, white backlit LCD door mounted display keypad assembly is used to view the unit status and allow operator adjustment. Using a combination of text and standard Icons, the unit display is easy to read and interpret.
The standard display keypad visually displays operating alarms by ashing the relevant icon, however, as an optional extra; a display keypad with audible alarms is available. The default screen shows the unit status and room condition (°C/RH %) without the need for interrogation and an easy to navigate menu structure for further interrogation and adjustment.
Standard Icons
22
Fan Operating
Cooling - Up to 2 Stages
Heating - Up to 3 Stages
De-humidication
Humidication - Variable
EasiCool™Precision Air Conditioning
Controls
Temperature Control
A temperature sensor is mounted in the return air with an option for a humidity sensor on full function units.
The temperature sensor is a NTC type thermistor accurate up to +/- 0.25°C and the humidity sensor accurate to +/­3% RH at 25°C at the sensor.
The microprocessor senses the return air conditions and maintains the return air temperature and humidity conditions by controlling cooling, heating, humidication and dehumidication outputs accordingly.
Monitoring
The microprocessor monitors and displays the following values:
• Return Air Temperature
• Return Air Humidity (Optional on Full Function units)
• Condensing Pressure (Optional on DX units only)
• Coil Temperature Sensor (Indoor)
The maintenance of key components such as compressors and air lters can be monitored via a service indicator which visually demonstrates the status relative to the component service intervals.
Introduction
Alarm Log
The controller logs and allows viewing of the last 100 conditions recorded in descending chronological order through the keypad display.
The standard display keypad visually displays operating alarms, however, as an optional extra, a display keypad with audible alarms is available.
Modbus / Carel BMS Connection
The Airedale controllers shall be able to communicate directly using the Modbus® protocol.
The Modbus® card shall be a small PCB (60mm x 30mm), which can be plugged into the controller to provide it with the following protocol support
Modbus® - JBus slave RTU mode (Remote Terminal Unit) with 8 bit encoding and error handling using 16 bit CRC Communication standard connection options of RS485 (multipoint) or RS232 (point-point) Maximum Baud Rate of 19200
The data communication shall be asynchronous serial, 8 data bits, 2 stop bits and no parity (in total 11 bits/datum).
The data/parameters from the controller shall be represented within Modbus® registers, each register containing information pertaining to temperatures, pressures, setpoint, status, etc and is available to the site integration company in a spreadsheet format
23
EasiCool™ Precision Air Conditioning
Controls
Alarm Handling
An alarm will be generated under the following conditions and will be visually displayed through the alarm log. In
Introduction
addition, under certain conditions the relevant Icon will ash repeatedly as indicated below:
Sizes 6 - 26
• Return air temperature high limit
• Return air temperature low limit
• Return air humidity high limit (Optional on Full Function units)
• Return air humidity low limit (Optional on Full Function units)
• Frost protection low limit (LPHW option only)
• Low pressure trip (Optional on DX units only)
• Filter change alarm
• Manual override
• Common alarm
• Power fail reset
• Communications failure
• Maintenance - fan and compressor (once hours run limit exceeded)
• Airow failure (
• Compressor failure (Optional on DX units only) (
• Electric Heating Overheat cut-out (
• Humidier alarm (Full Function units only) (
)
)
)
)
Sizes 28 - 60
• Return air temperature high limit
• Return air temperature low limit
• Return air humidity high limit (Optional on Full Function units)
• Return air humidity low limit (Optional on Full Function units)
• Frost protection low limit (LPHW option only)
• Low pressure trip (Optional on DX units only)
• Filter change alarm
• Manual override
• Common alarm
• Power fail reset
• Communications failure
• Maintenance - fan and compressor (once hours run limit exceeded)
• Fire
• Flood
• Phase Failure
• Critical
• Non-critical
• Airow failure (
• Compressor failure (Optional on DX units only) (
• Electric Heating Overheat cut-out (
• Humidier alarm (Full Function units only) (
24
)
)
)
)
EasiCool™Precision Air Conditioning
Controls
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.
Remote On/Off
Terminals for interlocking are provided to enable or disable the unit remotely.
Fire Shut Down
Terminals for interlocking are provided to shut down the unit in the event of re.
Compressor Anti-Cycle Control
Programmed to provide automatic anti-cycling delays of up to 10 starts per hour with a minimum off time of 3 minutes.
Compressor Rotation
On tandem compressor units the controller is programmed to provide automatic compressor rotation to ensure equal compressor running times. In the event of a compressor fault on networked systems the controller is programmed to automatically select the next compressor in order of running hours.
Introduction
Compressor Hours Run Log & Reset
Allows the user to monitor the running times of each compressor and reset after maintenance.
Hours run log or visual service indicator provided.
Evaporator Fan Hours Run Log & Reset
Allows the user to monitor the running times of the evaporator fans and reset after maintenance.
Hours run log or visual service indicator provided.
Head Pressure Control and Condenser Fan Speed Controller
Each refrigerant circuit (TEV or EEV) is tted with condenser pressure transducers and a modulating condenser fan speed controller to allow the designed head pressure to be monitored and maintained under varying ambient conditions. Condenser fan speed control settings are input via the display keypad.
Evaporator Fan Speed Controller
(Sizes 6 - 26) Evaporator fan speed control is easily set via the display keypad and can be incrementally increased or decreased to meet on site airow and external static pressure requirements.
Filter Change Alarm
Filter change is managed by the AireTronix software, and is based on fan(s) hours run with an alarm being generated when the pre-set run time limit has been exceeded. The set-point value can be adjusted to suit each application and is factory set to 2000 hours.
Hours run log or visual service indicator provided.
LPHW Frost Protection
(DX units with LPHW option) The coil temperature sensor is mounted on the DX coil and has a xed 3°C low limit setting to disable DX cooling.
25
EasiCool™ Precision Air Conditioning
Controls
Standard Network Features
As standard the AireTronix controller is capable of the providing a platform for the following and can be enabled on
Introduction
request for 2 to 8 units, please specify at order:
Networking
A Local Area Network (LAN) can be used to connect up to 8 units to offer intercommunication and Duty/Standby control. This also allows the connection of computers, printers and modems on the same communications ring. For further details, please contact Airedale Controls.
CAUTION
When adding to an existing network, please consult Airedale to ensure strategy compatibility.
Duty/Standby Operation
The controller enables units to operate in run/standby mode, with up to 6 units networked together, without the need for additional hardware or controllers. Standby units can be congured to start when the run unit has a critical alarm and/or a high/low return air temperature alarm.
During peak demand, the standby units can temperature assist.
Duty Rotation
Networked units can be congured to duty rotate, providing equal hours run of fans and compressors.
OPTIONAL EXTRAS
Audible Alarm
The display keypad can be upgraded to include audible alerts. BMS Interface Card Enables Controlled units to be interfaced with most BMS, factory tted, 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.
Water Detector
Two methods are available: 1 A solid state (probe) sensor is supplied loose for remote mounting on site. 2 Tape suitable for sensing water droplets is supplied loose for remote mounting on site. Standard tape length 10m.
26
Smoke Detector
Supplied loose for remote mounting to shut down the unit and activate the alarm upon sensing the presence of smoke.
Firestat
Installed in the return air stream to shut down the unit in the event of an unusually high return air temperature.
General Features
Features Downow Upow
Secure Door Locks
Return Air Grille
Cold Water Condensate Pump
Open Floorstand
Enclosed Floorstand
Ceiling Duct Extension
EasiCool™Precision Air Conditioning
Introduction
System Conguration
X Type WX Type X Type WX Type
● ● ● ● – – ● ● ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
●
Standard Feature ○ Optional Feature – Not Available
Open & Enclosed Floorstand
Open or enclosed oorstands are available, complete with adjustable feet and oor tile lip. Enclosed oorstands incorporate an air turning vane. Height of the oorstand; please specify at order.
Discharge Air Conguration
Standard conguration is forward air discharge. Reverse air discharge is available, please specify at order.
Ceiling Duct Extension
Straight and ‘L’ shaped duct extensions up to a height of 1350 mm constructed and nished to match the unit are available.
For extensions greater than 1350 mm, please contact Airedale.
Height; please specify at order.
Services Side Access Gland Plate
As standard services can be routed through the gland plate in the base of the units. A gland plate can be optionally located to the lower left hand side face of the unit, if required.
27
EasiCool™ Precision Air Conditioning
Bolt on Doors
Simple bolt on cabinet doors can be factory tted as a cost reduction option. The cabinet doors are full height and secured by M6 bolts, a 4 mm Allen key is provided for access.
Introduction
Plain Doors - No Display Keypad
Networking is a standard option of the AireTronix microprocessor; refer to Controls, for full details. To reduce costs, the “slave” units can be supplied with plain doors (no display keypad), in all door types, please specify at order.
Threaded Water Pipe Connection
As an alternative to brazed water pipe connections, BSP brass male taper threaded connections can be factory tted.
Export Packing
Units can be supplied packed inside a case to provide additional protection during transportation, (not required for container delivery).
Standard construction material is solid wood.
Sterling Board LAT (Wooden Case) Packing
Units shall be supplied complete with additional LAT corner protection and cross braces to afford extra transit protection. Sterling board heat treated man made material shall be used (including pallet) to comply with phytosanity import regulations (please contact Airedale for this option).
Optional Extras General
Condensate Pump
Sizes 6 - 26
The condensate pump has a 3 litre reservoir with a capacity of 5 l/m at a head of 8m and is mounted in the unit base.
Sizes 28 - 60
The condensate pump has a 6 litre reservoir with a capacity of 5 l/m at a head of 10.8m and is mounted in the unit base. The following graphs illustrate the TOTAL static (head) pressure available. The system horizontal pipe losses and vertical lift should be factored in when calculating the condensate pump performance.
28
EasiCool™Precision Air Conditioning
A
B C D
IMPORTANT Use only 10mm (3/8”) copper tube when connecting the discharge stub to the condensate pump. The discharge line from the pump should rise no more than 6 meters vertically and no more than 8 metres in total length before being interrupted with a swan neck air break and tundish.
6 - 26
12
10
8
6
Head (m)
4
2
0
5 97 13 1511
Pump Flow Rate (l/min)
28-60
Introduction
12
10
8
6
Head (m)
4
2
0
5 97 13 1511
Pump Flow Rate (l/min)
A Condensate Pump B Condensate pump discharge line; 10mm (3/8”) copper tube; maximum vertical run 6m, maximum TOTAL run 8m C Swan Neck with Tundish D Drain line from Tundish, > 10mm (3/8”) tube (MUST BE copper tube when coupled with humidier drain), minimum fall 1 : 20
Condensate and Humidier
All drain trays are tted with their own trap assembly. Condensate drain may be run to waste via ordinary plastic waste pipe. Humidier drain may be run to waste via pipe suitable for liquid temperatures of 100°C. All drain pipework operating under gravity should be sloped away from the equipment and the gradient should be made as steep as possible. Suitable rodding positions should be incorporated particularly if the run is long.
Water Conductivity
As standard the humidier is tted with the standard conductivity cylinder which covers the majority of water supplies. Low and High conductivity options can be specied at order.
Safe Operation of Humidier
To protect the humidier bottle from dangerous pressures in event of the steam supply pipe becoming blocked, a tundish is installed between the water inlet solenoid and the cylinder to act as a reservoir and to feed water to the humidier inlet manifold as required.
CAUTION
An overow weir is incorporated in the common ll/drain tundish. Any pressure build up in the cylinder would be allowed to vent through the tundish to atmosphere. It is MOST IMPORTANT that the steam distribution pipe is not damaged or kinked at any time to avoid the risk of unacceptably high pressure building up in the electrode bottle.
29
EasiCool™ Precision Air Conditioning
(1)
(1)Return Air (2)Case Breakout (3)Discharge Air
(1)
(2)
Sound Measurement Method
Measurement Of Sound Power
All sound data quoted has been measured in the third-octave band limited values, using a Real Time Analyser calibrated
Introduction
sound intensity meter in accordance with BS EN ISO9614 Part 1 : 1995.
All Sound Power Levels quoted are calculated from measured sound intensity according to BS EN ISO9614 Part 1 :
1995.
Semi Hemispherical
Sound Pressure Levels are calculated from sound power using the semi-hemispherical method where the noise source is in junction with 2 boundaries i.e. the oor and 1 wall.
Free Field
For comparison, the semi hemispherical gures can typically be reduced by 3dB to provide free eld conditions.
IMPORTANT
The sound data quoted is based on the unit having a ducted return air, ducted (or underoor) discharge air and standard forward curved fan and EC motors tted, refer to illustration below.
Case breakout sound data is therefore independent of the discharge air and return air sound data.
For non-ducted return air applications, the overall case breakout sound levels may increase, due to the return air sound being predominant. Within the conditioned space, sound from in-room ducted discharge air grilles and other equipment will contribute to the overall sound level and should therefore be considered as part of sound calculations.
Specialist acoustic advice is recommended for noise critical applications.
(3)
(2)
30
(3)
(1) Return Air (2) Case Breakout (3) Discharge Air
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