Condair HE2 User manual

INSTALLATION AND OPERATING INSTRUCTIONS
Evaporative Humidifier / Cooling System
2565425 EN 1201
Condair HE2

3
1 General Information 4
1.1 Foreword 4
1.2 Health and Safety 4
1.3 Hygiene 4
1.4 Correct Use 5
1.5 Warranty 5
1.6 HE2 OEM Versions 5
1.7 Delivery and Storage 6
1.8 Handling Evaporative Material 6
1.9 Correct Method of Lifting 6
1.10 Disposal 6
1.11 Inlet Water - Quality Guide 7
2 Product overview 9
2.1 HE2 Principle of Operation 9
2.2 HE2 Overview 10
2.3 Typical HE2 XL Evaporative Module Overview
Module Specification 11
2.4 Typical HE2 MC3 Evaporative Module Overview
Module Specification 12
2.5 Typical HE2 OEM Circulating Evaporative
Module Overview Module Specification 13
2.6 Typical HE2 OEM Direct Feed Evaporative
Module Overview Module Specification 14
2.7 HE2 MC3 Plus Management System Overview 15
2.8 HE2 MC3 Management System Overview 16
3 Installation 17
3.1 Installation HE2 MC3 / HE2 MC3 Plus 17
3.1.1 HE2 MC3 / HE2 MC3 Plus Installation Overview 17
3.1.2 Step 1 - Position the Evaporative Module 18
3.1.3 Step 2 - Install Blanking Plates 19
3.1.4 Step 3 - Connect Feed Water Supply 20
3.1.5 Step 4 - Install Drain Pipework 21
3.1.6 Step 5 - Position the Management System 22
3.1.7 Step 6 - Connect Power Supply to
Management System. 23
3.1.8 Step 7 - Connect HE2 Module 24
3.1.9 Step 8 - Connect HE2 Controls 26
3.1.10 Step 9 - Connect HE2 Controls 27
3.1.11 Step 10 - Install the Leak Detection System 27
3.2 HE2 OEM Circulating Installation 28
3.2.1 HE2 OEM Circulating Installation Overview 28
3.2.2 Step 1 - Position the Evaporative Module 29
3.2.3 Step 2 - Install Blanking Plates 30
3.2.4 Step 3 - Connect Feed Water Supply 31
3.2.5 Step 4 - Install Drain Pipework 32
3.2.6 HE2 OEM Circulating - Requirements 33
3.2.7 HE2 OEM Circulating Product Options 34
3.3 HE2 OEM Direct Feed Installation 35
3.3.1 HE2 OEM Direct Feed Installation Overview 35
3.3.2 Step 1 - Position the Evaporative Module 36
3.3.3 Step 2 - Install Blanking Plates 37
3.3.4 Step 3 - Connect the Feed Water Supply 38
3.3.5 Step 4 - Install Drain Pipework 39
3.3.6 HE2 OEM Direct Feed - Requirements 40
3.3.7 HE2 OEM Direct Feed Product Options 41
4 Commissioning 42
4.1 Commissioning (HE2 MC3/ HE2 MC3 Plus) 42
4.2 Commissioning
(OEM Circulating and OEM Direct Feed) 46
4.3 Operating the HE2 Microprocessor Controller 48
4.3.1 The Microprocessor 48
4.3.2 Programming the Controller 49
4.3.3 Status Page 54
4.3.4 Information Pages 54
4.3.5 Alarms and Fault Modes 55
4.4 Wiring diagrams 57
4.4.1 HE2 MC3 Wiring Diagram 57
4.4.2 HE2 MC3 Plus Wiring Diagram 58
5 Maintenance 59
5.1 HE2 MC3 Maintenance Schedule 59
5.2 HE2 MC3 & OEM Maintenance Guide 60
5.3 HE2 Routine Water Sampling and Testing 61
5.4 Cleaning and Disinfection 62
5.5 Cleaning and Disinfection Method Statement 63
5.6 HE2 MC3 Frequently Asked Questions 64
5.6.1 Basic Problems 64
5.6.2 Detailed Problems 65
6 Product specification 67
6.1 HE2 MC3 System Weight 67
6.2 HE2 OEM Circulating System Weight 69
6.3 HE2 MC3 Direct Feed System Weight 71
6.4 HE2 Separator Weight 73
6.5 HE2 Module Code Identification 74
Contents

4
1.1 Foreword
This manual has been written to ensure the safe use, performance and longevity of the equipment and is
intended for use by engineers and properly trained technical personnel. Please read this manual thoroughly
before specifying, designing or installing a Condair HE2 system. Retain for reference.
Condair Ltd. policy is one of continuous research and development. Condair Ltd. reserves the right to amend,
without notice, the specifications provided in this document. Condair Ltd. does not guarantee, or accept liabil-
ity for, the accuracy of information in this document.
Guide to symbols used within this manual
Instructions relating to safety
Instructions relating to the correct operation of the unit
1.2 Health and Safety
Installation, maintenance, repair work or de-commissioning should only be carried out by appropriately quali-
fied and properly trained technical personnel. It is the customers responsibility to ensure their suitability. The
customer is responsible for ensuring that the installation of the equipment complies with all local regulations.
Any risks or hazards relating to the system, including during installation and maintenance, should be identiied
by a competent Health & Safety representative who shall be responsible for introducing effective control meas-
ures as necessary.
WARNING: Always isolate all supplies to the system before commencing any maintenance or
repair.
COSHH and Personal Protective Equipment:
Refer to HSE for information on the Control Of Substances Hazardous to Health and recommendations with
regard to Personal Protective Equipment including Respiratory Protective Equipment.
1.3 Hygiene
Your attention is drawn to the local Health & Safety Executive’s technical guidance on the control of legionel-
losis in water systems. If inadequately maintained, water systems, of which any humidifier is a part, can sup-
port the growth of micro-organisms, including the bacterium that causes Legionnaires” disease. Condair Ltd.
has considered all aspects of this equipment to reduce as far as possible the risk of Legionnaires” disease and
other similar conditions, but it is important that users are aware of their responsibilities under the ACoP in
reducing the risk of Legionellosis.
To prevent the growth of Legionella, users are required to:
1. Carry out a risk assessment of the water system using a competent person, and implement an appropriate
monitoring and control regime.
2. Avoid water temperatures which favour the growth of Legionella.
3. Avoid water stagnation.
4. Clean and disinfect the system in accordance with the Health & Safety Executives technical guidance and
instructions in this manual.
5. The HE2 system MUST be connected to a clean, potable mains water supply and it is recommended that
the supply pipe work is chlorinated. It is the responsibility of the user to ensure that the water system com-
plies with local regulations and bylaws, particularly those for the control of Legionella microbes (such as
the HSE ACoP L8, The control of Legionella microbes in water systems). The use of mains water fed tanks
and reservoirs is only permitted as part of a managed water treatment system.
1 General Information

5
WARNING: The HE2 must be installed, operated and maintained in accordance with this
manual. Failure to do so could result in contamination that might cause Legionnaires” dis-
ease, which can be fatal.
1.4 Correct Use
The HE2 system is intended for adiabatic humidification and cooling. Any other, or further, application is not
considered use for the intended purpose. Condair Ltd. cannot be made liable for any damage or injury attribut-
able to inattentive, inappropriate, negligent or incorrect operation of the equipment whether or not caused
deliberately.
Caution: To prevent water stagnation and microbial contamination, the HE2 power supply should be
left switched on continuously. If the system is switched off for prolonged periods, typically longer than
one week (subject to risk assessment) the pipework and system should be disinfected as per instruc-
tions and a full risk assessment undertaken to ensure safe operation.
1.5 Warranty
HE2 parts are warranteed for 2 years from invoice date with the exception of replacement items listed in the
routine maintenance section. Failure to observe the manufacturers installation and maintenance recommenda-
tions and instructions will invalidate the warranty. Condair Ltd. cannot be made liable for damage or injury
attributable to failure to observe the manufacturers installation and maintenance recommendations and
instructions.
1.6 HE2 OEM Versions
The HE2 OEM versions are designed for customers who are familiar with evaporative humidification/cooling
systems and wish to provide their own controls and hygiene precautions. OEM versions are designed to be
components in a hygienic humidification/evaporative cooling system, and are not to be considered as entire
systems in their own right. There are a number of requirements that the customer MUST ensure are met in
order to bring the OEM versions up to a standard to comply with VDI hygiene specifications. These are listed
in this manual.
Warning: The HE2 “OEM” versions, unlike the HE2 MC3, do NOT incorporate, as standard,
methods to control the growth of micro-organisms (including the bacterium which causes
Legionnaire’s disease). When designing or installing an air handling system that incorporates
an “OEM HE2”, appropriate micro-organisms and microbial control methods MUST be consid-
ered and this should only be undertaken by suitably qualified persons. A risk assessment
MUST also be undertaken in relation to control of micro-organisms and microbial growth,
especially Legionnaires disease. If in doubt and for further information, contact Condair AG.

6
1.7 Delivery and Storage
To ensure consistent quality, each evaporative module is inspected before leaving the factory. If the module is
to be put into storage prior to installation, it must be stored under cover and protected from physical damage,
dust, frost and rain.
It is recommended that the evaporative module be kept in its transit packaging for as long as possible prior to
installation.
All evaporative modules are supplied flat-packed for assembly “in situ’. The evaporative module must
be assembled before water and electrical connections are made.
Please refer to HE2 Evaporative Module Assembly Instructions supplied with the system.
Inspection
Upon receipt, remove the transit packaging and inspect the unit to ensure that no damage has occurred during
transit. Any visible damage must be reported to your Condair distributor immediately. If the unit is to be put
into storage, the packaging should be replaced.
1.8 Handling Evaporative Material
WARNING: the HE2 evaporative material should not be cut or crushed as doing so may gener-
ate dust.
HE2 evaporative material is manufactured from glass fibre and is not classified as hazardous. It is recom-
mended that Personal Protection Equipment such as gloves, protective clothing and eye protection are used
during handling to protect the user from fibres or dust. If dust is generated during handling it is recommended
that respiratory protection is worn. Damage to the evaporative material will affect the performance of the
humidifier and may result in water carry over.
In the event of contact, the following procedures should be observed:
– Eye contact – wash well with water for a minimum of 15 minutes.
Skin contact – wash well with soap and water.
Contact your Condair distributor for COSHH data sheet if required.
1.9 Correct Method of Lifting
Lifting or handling must only be carried out by trained and qualified personnel. Ensure that the lifting operation
has been properly planned and risk assessed, and that all equipment has been checked by a skilled and
competent Health & Safety representative.
It is the customer's responsibility to ensure that operators are trained in handling heavy goods and to enforce
the relevant lifting regulations.
Any personnel handling or lifting the HE2 system must follow the Lifting Operations and Lifting Equipment
Regulations 1998 and Approved Code of Practice L113. The regulation imposes duties on employers and self
employed persons and persons who have control, to any extent of lifting equipment.
The packaged HE2 unit may be carried by fork lift from the underside, but caution should be exercised to
ensure that the load is balanced before lifting. Refer to weights and measures section for system weight.
1.10 Disposal
You must observe local laws and regulations when disposing of your Condair HE2 at the end of its
working life. Use personal protective equipment as recommended in the handling section above when
handling the evaporative material. In addition, respiratory protection should be worn to avoid inhala-
tion of dust or debris from the air flow which may have accumulated on the material.
The evaporative module is constructed from stainless steel which may be fully recycled.

7
1.11 Inlet Water - Quality Guide
The quality of water being used in the HE2 system should be checked prior to the commissioning of a system.
Condair Ltd. recommends that the HE2 system must be connected to a clean, potable (drinking water quality)
mains water supply. For areas of hard water and to minimise scale build up the water supply may be treated
by "Reverse Osmosis" (RO).
Reverse Osmosis
For HE2 systems where the water supply is treated by RO it is recommended that the system is operated
within the following parameters. The use of RO water fed tanks and reservoirs is only permitted as part of a
managed and hygiene monitored water system and should form part of the water system risk assessment.
Conductivity > 5 μS cm-1 at 20 °C Circulating HE2 pump system
Conductivity > 30 - 50 μS cm-1 at 20 °C Direct feed system
Other Water Supplies
There is a growing demand to utilise sustainable water sources to help overcome scarcity challenges and
recycle water. It is possible to use high-quality, treated effluent for non-potable applications. The following
gives guidance on reclaimed water quality that may be acceptable for use within the HE2. “Effluent treated
water”, must be treated by an appropriate water treatment method and risk assessed to ensure it is safe and
suitable for use in the HE2 unit. It is the responsibility of the user to ensure that the water supply system is
part of a managed, hygiene monitored water system, risk assessed and complies with the local regulations
and bylaws.
Below are example water conditions that would allow a HE2 to operate within specification.
Parameter Supply Water Concern
Temperature < 20°C Warm water favours growth of bacteria
Aluminium - No specic concerns
Ammonium < 0.50 mg/l Odour passed to air
Calcium < 300 mg/l Scale formation
Chloride < 300 mg/l Corrosion of stainless steel
Colour None Not directly a concern
Copper < 1 mg/l Deposits and corrosion stimulation
Conductivity < 650 μS cm-1 at 20°C Total hardness and scale formation.
pH 6.5 to 9.5 Acid or Alkali damage to equipment.
Iron < 0.5 mg/l Deposit formation on oxidation and a
critical support role in Legionella growth.
Manganese < 0.1 mg/l Deposit formation
Nitrate - No specic concerns
Nitrite - No specic concerns
Odour Acceptable to users Smell passed to air
Sulphate < 250 mg/l No specic comments
Sodium - No specic concerns
Total organic carbon - No specic concerns
Turbidity < 5 NTU No specic concerns
Colony count 22°C < 1000 cfu/ml Indicator of contaminated water supply
Coliform bacteria < 10 cfu/100 ml Indicator of poor water quality
Legionella bacteria < 50 cfu/1000 ml Risk of Legionella
Pseudomonas species < 10 cfu/100 ml Indicator of slime forming potential

8
Controlled Substances
Many of the following controlled substances are toxic; for example Vinyl chloride is highly toxic, flammable and
carcinogenic and could be evaporated off the matrix and passed to the airflow. Therefore it is important to note
that any supply water coming from complex waste water, which may contain these contaminates should there-
fore be carefully risk assessed by a water treatment specialist.
Clostridium perfringens
(including spores)
Cadium Nickel
Acrylamide Chromium Pesticides
Antimony Cyanide Polycyclic aromatic hydrocarbons
Arsenic 1,2-dichloroethane Selenium
Benzene Epichlorohydrin Tetrachloroethene and Trichloro-
ethene
Benzo(a)pyrene Fluoride Trihalomethanes
Boron Lead Vinyl chloride
Bromate Mercury
Water Monitoring
The HE2 water system must be must be monitored for hygiene as part of the maintenance programme. Please
refer to the maintenance section for further guidance.
Disinfection Tablets
Depending on the system hygiene, it is advised that preventative disinfection tablets should be added to the
HE2 water tank at an appropriate frequency, such as a monthly basis.
Condair Ltd. recommend adding disinfection tablets (our code DISIFIN XL) to the tank at approx 500 ppm
strength on a monthly basis to control microbiological activity. DISIFIN is a safe, non toxic, environmental
friendly & 100% biodegradable chemical which provides a prophylactic, disinfection dose and is effective
against all types of microorganisms including; legionella and E.coli.
DISIFIN may be added to the tank whilst the system continues operating and left to dissolve away naturally.
Please refer to the maintenance section for further guidance.
Note: Adding DISIFIN tablets or other disinfection chemicals will increase the conductivity in the tank. This
should be taken into account on systems where a conductivity control system is in use.
If you are in any doubt about the suitability of water quality please contact your Condair distributor who will be
pleased to support you.

9
2.1 HE2 Principle of Operation
Raising the relative humidity or reducing the temperature by evaporative cooling by passing air through a wet-
ted matrix is a simple and safe way to humidify and cool the air - with the added benefits of very low running
costs.
At the heart of the HE2 is the evaporative module, which is installed in an AHU or duct. Water is supplied to
the top of a highly efficient bonded matrix, which is impregnated with silver for added hygiene. Dry air passes
through this moist material picking up water vapour, raising the humidity as it does so. This process consumes
very little energy, far less than steam humidifiers, or even cold water atomisers.
The water that doesn’t evaporate assists in washing the matrix material and flows into a stainless steel tank
at the base of the unit before being re-circulated up onto the matrix again (except in the HE2 OEM Direct Feed
version, in which the water passes directly to drain).
As each vertical matrix bank has its own water supply, multi-stage control is an option which individually oper-
ates sections of the system for closer control.
Modular construction facilitates a range of system sizes and efficiencies to match the requirements of indi-
vidual applications, and ease of installation, maintenance and replacement should damage occur to any of the
matrix cassettes.
To prevent clogging of the humidifier cassettes, the airflow into the module must be filtered to at least EU5
filtration standard. Finer filtration may be required for hospitals or where air is being supplied to areas where
food or electronic products are being handled.
To prevent droplet carry over an optional droplet separator can be fitted. It is recommended for velocities
above 3.5 m/s (11.5 ft/s) and the HE2 system is installed after the fan, a suitable laminating device may be
required.
For areas of hard water, water treatment such as reverse osmosis is recommended to reduce maintenance
requirements. (see water quality guide for further information).
Air Flow
NB: When installing the
drain, please allow fall for
drainage.
Typical HE2 MC3 Installation
Please note that electrical
Isolator, module up stands,
interconnecting pipework and
drain pan are not supplied.
2 Product overview

10
2.2 HE2 Overview
The HE2 system consists of two main components as follows:
– Evaporative Module
The evaporative module is available in a range of widths. Standard
width; (600mm (24”) to 3000mm (118”)) and XL width; (3300mm (130")
to 3900mm (153.5")). The module is also available in a range of
heights; (750mm (30”) - 3000mm (118”)) to match the requirements of
individual applications. The evaporative matrix consists of modular
cassettes with low pressure drop which are available in a range of
sizes and efficiencies.
The evaporative module is constructed from recyclable high grade
stainless steel.
The module has drain and overflow connections which are integrated
on HE2 MC3 versions. The drain assemblies supplied with HE2 XL and
HE2 MC3 systems are reversible and simplify drain plumbing.
A single electrical junction box, with pre-wired flying lead for connec-
tion to the management system is included in the HE2 MC3 system to
simplify installation. The HE2 MC3 Plus system has two electrical junc-
tion boxes with pre-wired flying leads.
Water flow and level in the HE2 MC3 systems are controlled by a fill control solenoid, float valve (x 2 on
HE2 MC3 or HE2 MC3 Plus XL) and low/high level float switch. Drain flow is controlled by a motorised
valve on MC3 systems. Water is recirculated over the matrix by a high grade circulating pump.
– Management system
The HE2 MC3 or HE2 MC3 Plus systems include a microprocessor
control panel which is located outside the AHU, up to 100m (328’)
away from the evaporative module. A 10m (33’) flying lead is supplied
unless otherwise specified (two flying leads are supplied on a HE2
MC3 Plus system). The system gives digital control over desired rela-
tive humidity or temperature levels, with a built in hygiene measures
such as; dilution, drain and other water quality maintenance features.
The system can be timer controlled to activate only during hours of
building occupancy.
Comprehensive real-time feedback shows current relative humidity
and temperature, demand, hours run, system operating status and
whether maintenance is required.
The whole system is easy to set up, has multi-lingual options (English,
French, German, Spanish, Czech, Dutch, and Swedish) and is secu-
rity code protected to prevent unauthorised alteration of system set-
tings.

11
2.3 Typical HE2 XL Evaporative Module Overview
Module Specification
Matrix
Cassette
Re-circulating
Pump
Tank
Dim A Width
(See coding explanation at the back
of this manual).
50mm (2”) Upstand Not Supplied
575mm (23”)
O/All Depth The unit must be installed on a minimum
50mm (2”) upstand to ensure gravity drainage.
Dim B Height (See coding explanation at the back of this manual)
445mm
(18”)
Tank
Matrix depth
(see coding expla-
nation at the back
of this manual)
Distribution
Header
Description Specication
Module Construction Stainless Steel 304
Evaporative Material Composite glass bre impregnated with an inorganic rigidifying solution (non-com-
bustible according to Euro Class A2-S2, d0 - conforming to EN13501-1 (BSI)).
Water Pump Immersion Pump 110/230 V 50/60 Hz. IP 55 CE Approved
Water Inlet Size 15mm (1/2") Pipe-work
Water Inlet Control Inlet Solenoid Valve
Float Switch
Float Valve x 2
Water Drain Size 1 x 54mm (2") Overow Outlet plus 1 x 28mm (1") Drain Outlet
Water Drain Control Motorised two port n/o valve 110/230 V 50/60 Hz 28mm
Water Inlet Flow and Pressure 28 l/m (7.4 US gallons/min) at 2 bar (29psi)
Max. Inlet Water Pressure 7 bar (101 psi)
Max. Inlet Water Temperature 20ºC (68ºF)
Modulating Control Option 2 Stage (1 Solenoid valve) 5 Stage (4 Solenoid valves) - HE2 MC3 Plus only
3 Stage (2 Solenoid valves) 6 Stage (5 Solenoid valves) - HE2 MC3 Plus only
4 Stage (3 Solenoid valves) 7 Stage (6 Solenoid valves) - HE2 MC3 Plus only
Optional Hygiene Systems PureFlo Ag+ anti-microbial cartridge and 5 micron sediment lter
PureFlo conductivity sensor with setpoint drain
PureFlo UV (in-line/submerged) disinfection system with interlock
System Options Leak Detection Sensor to raise an alarm when water is detected - MC3 Plus only
Water Temperature Monitor to regulate the water temperature - MC3 Plus only

12
2.4 Typical HE2 MC3 Evaporative Module Overview
Module Specification
Matrix
Casette
Distribution
Header
Re-circulating
Pump
Tank
Dim A Width
(See coding explanation at
the back of this manual).
50mm (2”) Upstand Not Supplied
575mm (23”)
O/All Depth
Matrix depth
(See coding expla-
nation at the back
of this manual).
Caution:
The unit must be installed on a minimum
50mm (2”) upstand to ensure gravity drainage.
Dim B Height (See coding explanation at the back of this manual)
445mm
(18”)Tank
Description Specication
Module Construction Stainless Steel 304
Evaporative Material Composite glass bre impregnated with an inorganic rigidifying solution (non-com-
bustible according to Euro Class A2-S2, d0 - conforming to EN13501-1 (BSI)).
Water Pump Immersion Pump 110/230 V 50/60 Hz. IP 55 CE Approved
Water Inlet Size 15mm (1/2") Pipe-work
Water Inlet Control Inlet Solenoid Valve
Float Switch
Float Valve
Water Drain Size 1 x 54mm (2") Overow Outlet plus integrated 1 x 28mm (1") Drain Outlet
Water Drain Control Motorised two port n/o valve 110/230 V 50/60 Hz 28mm
Water Inlet Flow and Pressure 14 l/m (3.7 US gallons/min) at 2 bar (29psi)
Max. Inlet Water Pressure 7 bar (101 psi)
Max. Inlet Water Temperature 20ºC (68ºF)
Modulating Control Option 2 Stage (1 Solenoid valve) 5 Stage (4 Solenoid valves) - HE2 MC3 Plus only
3 Stage (2 Solenoid valves) 6 Stage (5 Solenoid valves) - HE2 MC3 Plus only
4 Stage (3 Solenoid valves) 7 Stage (6 Solenoid valves) - He2 MC3 Plus only
Optional Hygiene Systems PureFlo Ag+ anti-microbial cartridge and 5 micron sediment lter
PureFlo conductivity sensor with setpoint drain
PureFlo UV (in-line/submerged) disinfection system with interlock
System Options Leak Detection Sensor to raise an alarm when water is detected - MC3 Plus only
Water Temperature Monitor to regulate the water temperature - MC3 Plus only

13
2.5 Typical HE2 OEM Circulating Evaporative Module Overview
Module Specification
Matrix
Distribution
Header
Re-circulating
Pump
Tank
Dim A Width
(See coding explanation at
the back of this manual).
50mm (2”)
Upstand
Not Supplied
525mm (20”)
O/All Depth
Matrix depth
(See coding expla-
nation at the back of
this manual).
Caution:
The unit must be installed on a minimum
50mm (2”) upstand to ensure gravity drainage.
Dim B Height
(See coding explanation at
the back of this manual)
445mm
(18”) Tank
Description Specication
Module Construction Stainless Steel 304
Evaporative Material Composite glass bre impregnated with an inorganic rigidifying solution (non-com-
bustible according to Euro Class A2-S2, d0 - conforming to EN13501-1 (BSI)).
Water Pump Immersion Pump 110/230 V 50/60 Hz
IP 55 CE UL CSA Approved
Water Inlet Size 1/2" BSP Male
Water Inlet Control Float Valve
Water Drain Size 54mm (2") Overow Spigot
28mm (1") Drain Spigot
Water Drain Control N/A
Water Inlet Flow and Pressure 14 l/m (3.7 gallons) at 2 bar (29psi)
Max. Inlet Water Pressure 7 bar (101 psi)
Max. Inlet Water Temperature 20ºC (68ºF)
Modulating Control Option 2 Stage (1 Solenoid valve)
3 Stage (2 Solenoid valves)
4 Stage (3 Solenoid valves)
Optional Hygiene Systems PureFlo Ag+ anti-microbial cartridge and 5 micron sediment lter
PureFlo UV (in-line/sumberged) disinfection system with interlock
System Options Please refer to HE2 OEM Circulating Product Options
Please note that the management system is not supplied with the OEM Versions.

14
2.6 Typical HE2 OEM Direct Feed Evaporative Module Overview
Module Specification
Matrix
Distribution
Header
Tank
Dim A Width
(See coding explanation at
the back of this manual).
50mm (2”)
Upstand
Not Supplied
482mm (19”)
O/All Depth
Matrix depth
(See coding expla-
nation at the back of
this manual).
Caution:
The unit must be installed on a minimum
50mm (2”) upstand to ensure gravity drainage.
Dim B Height
(See coding explanation at
the back of this manual)
445mm
(18”) Tank
Description Specication
Module Construction Stainless Steel 304
Evaporative Material Composite glass bre impregnated with an inorganic rigidifying solution (non-com-
bustible according to Euro Class A2-S2, d0 - conforming to EN13501-1 (BSI)).
Water Pump N/A
Water Inlet Size 3/4" BSP Female
Water Inlet Control N/A
Water Drain Size 54mm (2") Overow Spigot
28mm (1") Drain Spigot
Water Drain Control N/A
Water Inlet Flow and Pressure N/A
Max. Inlet Water Pressure 7 bar (101 psi)
Max. Inlet Water Temperature 20ºC (68ºF)
Modulating Control Option 2 Stage (1 Solenoid valve) 5 Stage (4 Solenoid valves)
3 Stage (2 Solenoid valves) 6 Stage (5 Solenoid valves)
4 Stage (3 Solenoid valves) 7 Stage (6 Solenoid valves)
Optional Hygiene Systems PureFlo Ag+ anti-microbial cartridge and 5 micron sediment lter
PureFlo UV (in-line) disinfection system with interlock
System Options Please refer to HE2 OEM Direct Feed Product Options
Please note that the management system is not suppled with the OEM Versions.

15
2.7 HE2 MC3 Plus Management System Overview
Power
Power light
3 way switch
(On - Off - Drain)
Additional wiring
connections
Microprocessor
Controller
Key lock
Cable entry for 10m
flying lead supplied
pre-wired to
Evaporative Module
Management System Specification
Description Specication
Dimensions 360mm (14") wide x 420mm (17") high x 140mm (6") deep
Weight 8.5kg ( 18.7lb)
Required Power Supply 230 Vac fused at 5 Amps in the EU
110 Vac fused at 10 Amps in the US
Power Consumption 490 Watts max (excluding options)
Module to Management System
Inter-connecting Cable
2 x Armoured 15mm (1/2”) diameter, 10m (33’) supplied as standard (100m (328’)
Max)
BMS Outputs Common fault alarm (volt free contacts)
HE2 running output (volt free contacts)
Control Options On / Off (controlled by external enable, panel switch or internal timer)
Humidity sensor input (0-10 Vdc, 2-10 Vdc, 4-20 mA*)
Temperature sensor input (0-10 Vdc, 2-10 Vdc, 4-20 mA*)
External demand input (0-10 Vdc, 2-10 Vdc, 4-20 mA*)
Safety Interlock Terminals
IP Rating IP 31
Options Leak Detection Sensor to raise an alarm when water is detected
Water Temperature Monitor to regulate the water temperature
Up to 7 stage control (6 solenoid valves)
*Requires load resistor of 500 Ohms (not supplied).
Please note that the management system is not suppled with the OEM Versions.

16
2.8 HE2 MC3 Management System Overview
Power
Power light
3 way switch
(On - Off - Drain)
Additional wiring
connections
Microprocessor
Controller
Key lock
Cable entry for 10m
flying lead supplied
pre-wired to
Evaporative Module
Management System Specification
Description Specication
Dimensions 300mm (12") wide x 420mm (17") high x 140mm (6") deep
Weight 6.5kg (14.5 lb)
Required Power Supply 230 Vac fused at 5 Amps in the EU
110 Vac fused at 10 Amps in the US
Power Consumption 490 Watts max (excluding options)
Module to Management System
Inter-connecting Cable
1 x Armoured 15mm (1/2”) diameter, 10m (33’) supplied as standard (100m (328’)
Max)
BMS Outputs Common fault alarm (volt free contacts)
Control Options On / Off (controlled by external enable, panel switch or internal timer)
Humidity sensor input (0-10 Vdc, 2-10 Vdc, 4-20 mA*)
Temperature sensor input (0-10 Vdc, 2-10 Vdc, 4-20 mA*)
External demand input (0-10 Vdc, 2-10 Vdc, 4-20 mA*)
Safety Interlock Terminals
IP Rating IP 31
Options Up to 4 stage control (3 solenoid valves)
*Requires load resistor of 500 Ohms (not supplied).
Please note that the management system is not suppled with the HE2 OEM Versions.

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3.1 Installation HE2 MC3 / HE2 MC3 Plus
3.1.1 HE2 MC3 / HE2 MC3 Plus Installation Overview
Air Flow
1
2
3
4
5
6
7
8
Model shown HE2 MC3
Step 1 - Positioning the Evaporative Module
Step 2 - Install blanking plates
Step 3 - Connect feed water supply
Step 4 - Install drain and overflow
Step 5 - Position and mount Management System
Step 6 - Connect power supply to Management System
Step 7 - Connect Management System to Evaporative Module
Step 8 - Connect Controls wiring
Step 9 - Install the Leak Detection System (HE2 MC3 Plus Option)
3 Installation

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3.1.2 Step 1 - Position the Evaporative Module
Installation should only take place after careful consideration of final position of the Evaporative module and
management system and should be in accordance with AHU/duct-work installation diagram below.
Always discuss the position of the HE2 module with your Condair representative!
Caution: The HE2 system must be installed within a waterproof AHU section.
The following points must be considered
1. The AHU / duct-work floor must be designed with a loading capacity capable of supporting the humidifier’s
weight when wet, as the largest unit will weigh 465kg (1025 lb) when in operation - see back of this man-
ual for weights and measures.
2. A drain pan with provision for running water to waste should be installed within the humidification section
to allow for wetting that might occur during installation, commissioning,operation or servicing. Where drain
pans are required to drain under gravity, ensure that the drains are trapped and primed and have enough
head to overcome the pressure of the system and for hygiene reasons completely drain down. On com-
missioning the system, drainage of the humidification section should be tested. The drain pan MUST drain
fully and should be accessible for cleaning and disinfection as part of routine maintenance of the system.
3. The Module must be positioned on a minimum height 50 mm (2”) up-stand or runners to allow for drain
pipe-work installation and removal of the tank and cassettes through the side of the AHU if required.
4. Provisions should be made for the water inlet, drain pipe-work and interconnecting electrical cable to exit
through the side of the AHU.
5. Side access through a door (preferably such that the cassettes may be pulled through for maintenance)
should always be provided and a minimum of 600mm (24”) access front and rear of system for inspection,
commissioning and maintenance.
6. A perforated plate (60/40) should be installed upstream in cases where the air flow is uneven.
Always discuss the layout with
your Condair representative
Very important: Use a spirit level to make sure that the unit is level front to back and across
the width when installed. Failure to observe this point could result in flooding of the AHU /
duct.
Minimum
50mm (2”)
Upstand
Air Flow
600mm (24”)
Minimum
Access
required
600mm (24”)
Minimum
Access
required

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3.1.3 Step 2 - Install Blanking Plates
Once the HE2 Evaporative Module has been positioned in the waterproof section of air handling unit, non-
corrosive blanking plates (not supplied) must be installed to prevent air bypass around the Module in the AHU.
Typical blanking plate arrangement shown below.
Blanking
Plate
(Not supplied)
AHU Wall
Minimum 50 mm (2”)
Box support upstand
(Not supplied)
NB: When installing the
drain, please allow fall
for drainage.

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3.1.4 Step 3 - Connect Feed Water Supply
A feed water supply with a minimum flow of 14 litres (3.7 gallons) (28 litres (7.4 gallons) for XL) per minute at
a pressure of 2 bar (29 psi) should be connected to the 1/2” BSP female threaded connection of the filling
hose.
If installing the PureFlo Ag+ or PureFlo UV (in-line) system option, it should be positioned as close to the
Evaporative Module inlet as possible. It is advisable to mount the PureFlo Ag+ or PureFlo UV (in-line) outside
the AHU for ease of access.
Typically, 15mm interconnecting copper pipework will be used. Not suitable for external mounting or freez-
ing conditions.
NOTE: A double check
valve (not supplied) must
be installed on the water
inlet.
Sediment
Silver
Caution: Where water quality exceeds 60ppm (ie. value is lower than 60), stainless steel pipework
should be used.
Flow
PureFlo Ag+ Assembly
(Optional)
Filling Hose
1/2” BSP (Female)
Threaded Fitting
15mm Interconnecting
Pipework (Not supplied)
15mm
Compression
Fitting
1/2” Ball Valve
XL systems will
include an integrated
double inlet
PureFlo UV
(Optional)