Neptronic SKV Series Manual

SKV Evaporative Cooling Humidifier-140508.docx
Evaporative Cooling Humidifier
SKV Series
Installation Instructions and User Manual
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Evaporative Cooling Humidifier
Installation Instructions and User Manual
www.neptronic.com Page | i
Foreword
Neptronic Company Overview
Founded in 1976, we’re a private corporation that designs, manufactures and distributes products for the HVAC
industry. Our product line includes intelligent controllers, electronic actuators, actuated valves, humidifiers and
electric heaters.
Our products are designed and manufactured by over 250 dedicated employees in our 7,500 m2(80,000 ft2)
state-of-the-art facility located in Montreal, Canada. Using a vertical integration model, our entire manufacturing
chain is under one roof from software and hardware development, to SMT circuit board assembly, to sheet metal
fabrication, to product testing ensuring that our products are engineered to last.
We currently hold several national and international patents and with our continued commitment to research and
development, we provide innovative products and technologies for the ever-evolving challenges of the HVAC
industry. Exporting over 70% of our sales, we have an exclusive distribution network around the globe that
provides comprehensive solutions to our worldwide customers.
About the Manual
These installation and operation instructions have been developed to facilitate the installation of the Evaporative
Cooling Humidifier.
The strict application of these instructions will ensure conformity of your installation and operation as
per the manufacturer's recommendations.
The application of these instructions is one of the conditions for the application of the warranty.
The application of these instructions does not ensure, at any time conformity to procedures,
regulation or local codes, regarding electric installation and connection to local water supply.
2014©: All rights reserved. This document cannot be reproduced totally or partially by any means whether,
electronic, mechanical, photocopy, recording or other, without prior written authorization of Neptronic.

Evaporative Cooling Humidifier
Installation Instructions and User Manual
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Health and Safety Instructions
General
This manual has been written to ensure correct, safe and sustainable operation of the SKV Evaporative cooling
humidifier and is intended for use by engineers and technical personnel trained by Neptronic or their official
agents. This manual must be read thoroughly before specifying, designing, installing or operating an SKV
Evaporative Cooling Humidifier. Please retain for reference and should you have any questions please contact
Neptronic and we will be pleased to assist.
The triangular symbol with the word WARNING: is used to designate danger of severe or lethal
consequence.
The circular symbol with the word CAUTION: is used to designate danger of injury, or to warn of
hazardous operating condition.
Electrical Warning Message
WARNING:
Risk of electric shock. Do not access. Disconnect Evaporative Cooling Humidifier prior to opening the access
door.
All work concerned with electrical installation MUST only be performed by skilled and qualified technical
personnel such as an electrician or a technician with appropriate training. The customer is always responsible for
ensuring the suitability of the technical personnel.
Please observe local regulations concerning the provision of electrical installations.
Health & Safety
Installation, maintenance, repair work or de-commissioning should only be carried out by appropriately qualified
and properly trained technical personnel. Any risks or hazards relating to the system, including during installation
and maintenance, should be identified by a competent Health & Safety representative who shall be responsible
for introducing effective control measures as necessary. The customer is responsible for ensuring that the
installation of the equipment complies with all local regulations.
CAUTION: Maintenance personnel must be trained by Neptronic or their official agent and it is the
customer’s responsibility to ensure their suitability. Failure to use properly trained personnel may lead
to a hazardous operating condition.
WARNING: Danger of electrocution! Danger of contact with live parts when the unit is open. Always
isolate all water and electrical supplies to the system before commencing any maintenance or repair.
Isolate power and water immediately if there is any sign of water leaking from the unit.
Protective Equipment
Please refer to the Health and Safety Executive for recommendations with regard to Personal Protective
Equipment and for information on the Control of Substances Hazardous to Health COSHH.
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Installation Instructions and User Manual
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Hygiene
IMPORTANT:
Refer to local Health and Safety regulation and codes on the control of Legionellosis in water systems. In the
absence of such, ASHREA guideline 12-2000 does provide recommendations.
If not adequately maintained, water systems can support the growth of micro-organisms including the bacterium
that causes Legionnaires’ disease.
SKV has been designed to reduce as much as possible any possible risk of legionellosis growth. Users also share
the responsibility in reducing the risk of legionellosis; users are required to:
Conduct a risk assessment of the complete water system.
Implement proper control of the water system.
Connect SKV to a clean and chlorinated water supply main.
Avoid stagnant water.
Avoid water temperatures that increase risk of Legionella growth.
Clean and disinfect the system regularly, refer to service section of the present Installation
Instructions and User Manual.
WARNING: Risk of Legionnaires’ disease which can be fatal. SKV Evaporative Cooling Humidifier
must be installed, operated and serviced in accordance with this Installation Instructions and User
Manual.
WARNING: In the event that the SKV Evaporative Cooling Humidifier is turned off for prolonged
periods (more than 24 hours), ensure that any water storage tanks and pipe-work supplying the unit
are drained, unless they supply other systems which ensure a regular renewal of water in the
system. Failure to do so may result in stagnation of the water and contamination that might cause
Legionnaires' disease, which can be fatal.
It is the responsibility of the person on whom the statutory responsibility falls to determine all control and
preventative measures outlined in this manual.
Correct Use
Neptronic systems and its products are designed only for humidification use. Any other application is not
considered appropriate for the intended purpose. The manufacturer cannot be made liable for any damage
resulting from incorrect use.
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Installation Instructions and User Manual
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Lists and Table of Contents
Contents
Overview.....................................................................................................................................................................1
Operation ................................................................................................................................................................1
Benefits...................................................................................................................................................................2
Features..................................................................................................................................................................2
Nomenclature .........................................................................................................................................................2
Specifications..........................................................................................................................................................3
Dimensions and Weights........................................................................................................................................3
Handling and Packaging.............................................................................................................................................4
Handling..................................................................................................................................................................4
Correct Lifting Method ............................................................................................................................................4
Inspection ...............................................................................................................................................................4
Unpacking...............................................................................................................................................................4
Installation Overview...................................................................................................................................................5
Local Regulations ...................................................................................................................................................5
List of Supplied Accessories...................................................................................................................................5
Installation Method Statement ....................................................................................................................................6
Stage 1 – On Site Assembly of Evaporation Module .............................................................................................7
Stage 2 – Evaporation Module Positioning and Mounting......................................................................................9
General Considerations......................................................................................................................................9
Positioning the Evaporation Module...................................................................................................................9
Stage 3 – Water Supply Installation .....................................................................................................................10
Stage 4 – Drain and Overflow Connections .........................................................................................................11
Stage 5 – Power Supply Connections..................................................................................................................12
Stage 6 – Electrical Control Connections.............................................................................................................13
Safety Contact Connections .............................................................................................................................13
On/Off Operation ..............................................................................................................................................14
Modulating Operation .......................................................................................................................................14
Mounting of the Enclosure................................................................................................................................14
Stage 7 – SKV Controller Installation and Configuration......................................................................................15
Menu Overview.................................................................................................................................................15
Main Menu Configuration .................................................................................................................................16
Main Menu - Controls .......................................................................................................................................17
Main Menu - System Setup ..............................................................................................................................18
Main Menu - Diagnostics ..................................................................................................................................19
Main Menu - Installer ........................................................................................................................................21
Firmware Update ..............................................................................................................................................22
Alarms...............................................................................................................................................................23
Servicing and Maintenance ......................................................................................................................................24
Preventative Maintenance ....................................................................................................................................24
Verification List .................................................................................................................................................24
Water Sampling and Testing (Hygiene)............................................................................................................24
Disinfection .......................................................................................................................................................25
De-scaling.........................................................................................................................................................26

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Installation Instructions and User Manual
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Troubleshooting ........................................................................................................................................................28
Water leakage from the tank ................................................................................................................................28
Water carries over into air stream ........................................................................................................................28
Loss of performance .............................................................................................................................................28
Scale build up on the surface of the media ..........................................................................................................28
Module pump is not functioning............................................................................................................................28
Exploded View and Parts List...................................................................................................................................29
Evaporative Cooling Humidifier ............................................................................................................................29
Media Panels ........................................................................................................................................................30
Recommended Spares List ..................................................................................................................................30
General Conditions of Sale and Warranty................................................................................................................31
General warranty policy............................................................................................................................................31
Special agreement on components under warranty.................................................................................................31
Notes ........................................................................................................................................................................32
List of Illustrations
Illustration 1- Evaporative Media ............................................................................................................................... 1
Illustration 2 - Humidifier Overview............................................................................................................................ 1
Illustration 3 - Dimensions and Weights .................................................................................................................... 3
Illustration 4 - Installation Stages............................................................................................................................... 6
Illustration 5 - Evaporation Module Assembly ........................................................................................................... 7
Illustration 6 - Positioning and Mounting.................................................................................................................... 9
Illustration 7 - Water Supply Installation .................................................................................................................. 10
Illustration 8 - Drain and Overflow Connections ...................................................................................................... 11
Illustration 9 - Power Supply Connections............................................................................................................... 12
Illustration 10 - SKV Controller Wiring Diagram ...................................................................................................... 13
Illustration 11 - Mounting the Controller Enclosure ................................................................................................. 14
Illustration 12 - Evaporative Cooling Humidifier Exploded View ............................................................................. 29
List of Tables
Table 1 - Nomenclature ............................................................................................................................................. 2
Table 2 - Water Supply and Drain Connection Specifications .................................................................................. 3
Table 3 - Evaporation Module Specifications ............................................................................................................ 3
Table 4 - P Trap Installation .................................................................................................................................... 11
Table 5 - Water Drain and Overflow Specifications................................................................................................. 11
Table 6 - Power Supply Specifications .................................................................................................................... 12
Table 7 - Passwords................................................................................................................................................ 16
Table 8 - Water Dilution (determine interval and number of cycles) ....................................................................... 22
Table 9 - Proposed plan of control and disinfection according to results of microbiological testing of water ......... 25
Table 10 - Evaporative Cooling Humidifier Part Numbers....................................................................................... 29
Table 12 - Media Panel Numbers............................................................................................................................ 30
Table 13 - Spare Parts Replacement ...................................................................................................................... 30
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Overview
Operation
The humidifier consists of an Evaporative Module that is installed in an
air handling unit (AHU) or a duct. Water enters the evaporation module
from the main water supply and reaches the top of the unit. The water
distribution system disperses water over the Evaporative Module like a
waterfall. Warm dry air passes through the wet media, evaporates water,
and raises the humidity level. The SKV also offers up to 21.5°F (12°C) of
cooling as a result of the transfer of energy when the water evaporates.
In order to prevent any possible carry over, an optional droplet separator
can be added at any time during the life of the SKV. Neptronic does
recommend the use of droplet separator when air velocity is above
600FPM (3m/sec).
Any particle or contamination present in the air flow can accumulate and
clog the media. For this reason, Neptronic recommends proper air
filtration, typically and at least 5 microns (EU5). On some critical
applications, such as medical sites or laboratories, a finer filtration might
be required.
Illustration 1- Evaporative Media
Illustration 2 - Humidifier Overview
65%
75%
85%
95%
Cooled &
Humidified Air
Warm &
Dry Air
Water
Evaporative
media Droplet
separator

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Benefits
Very low energy consumption (< 1kW)
Free cooling up to 21.5°F (12°C)
Hygienic operation
Custom modular design to fit exact dimensions of AHU or duct ensures minimal use of blanking
plates, which obstruct air passage and increase pressure drop through the evaporation module
Environmentally friendly
Low pressure drop
Simple and low maintenance. Easy access to water distribution on top, no tools required to remove
media panels, one screw to remove pump skid
Fast and efficient drain pump with the ability to lift the drain water when no slope is possible for the
drain water pipe
All parts in contact with water are made of stainless steel and designed for life
Uses any type of water, Deionised (DI), Reverse Osmosis (RO) or tap water
Features
Custom designed withHumidisoft to meet your specific duct/application dimensions
Energy transfer during water evaporation results in free cooling up to 21.5°F (12°C)
Low energy (< 1 kW) consumption ensuring an environmentally friendly application
Four humidification efficiencies: 65%, 75%, 85% and 95%
Inorganic and inflammable material (UL900 Class 1)
Minimum blanking plates resulting in lower pressure drop
5 microns PP pre-filter and silver ion dosing cartridges prevent microbial growth
Staging valves: up to 5 for flexible and accurate control
Includes SKV electronic controller
oMicroprocessor based, field configurable controller
oBACnet communication (optional)
oOn/Off or modulating control type
oMaster/slave configuration for up to 4 Evaporative Modules
oEasy connection with only one 6-wire control cable
oUser-friendly, menu-driven LCD (128 x 64)
oReal-time clock and SD card for scheduler, trending and history log
oFirmware upgrade via SD card
oStainless steel controller enclosure rated IP56 for outdoor installations
Nomenclature
Table 1 - Nomenclature
SKV R 95 C 1 D C
Type:
R= Recirculation
D= Direct Feed
O= OEM
Media Efficiency:
65 = 65% efficiency
75 = 75% efficiency
85 = 85% efficiency
95 = 95% efficiency
Controller:
C= Standard Controller
B= BACnet Controller
_= None
No. of Stages:
1= 1 Stage
2= 2 Stages
3= 3 Stages
4= 4 Stages
5= 5 Stages
Droplet:
D= Droplet separator
_= Not included
Voltage:
A= 120Vac
C= 230Vac

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Specifications
Table 2 - Water Supply and Drain Connection Specifications
Specification Description
Water Supply Size Ø3/4’’ (20mm) garden hose, male
Maximum Water Supply Pressure 70 PSI (4.8bar)
Maximum Water Supply Temperature 68°F (20°C)
Drain Pump Inlet Size Ø3/4" (20mm)
Overflow Outlet Size Tank size less than 94” (239cm): Ø1.5" (3.8cm)
Tank size greater than 94” (239cm): Ø2.0" (5.1cm)
Table 3 - Evaporation Module Specifications
Specification Description
Evaporation Module Frame Material Stainless Steel Grade 304
Evaporation Media – Material Glass fibre material bonded with a special inorganic compound
Evaporation Media – Fire Rating European Fire rating: (EN13501-1 & EN13238): Euro class A2, s2, d0
North America Fire rating: UL900 class 1 (by ETL)
Evaporation Media – Hygiene Evaluation EN ISO 846, VDI6022 Part I, suitable for use in HVAC-systems (by ILH Berlin)
Dimensions and Weights
Illustration 3 - Dimensions and Weights
Evaporative Module dimensions are calculated and customized to the actual size of the duct dimension using
Humidisoft. Please refer to drawing attached and referenced with the Humidisoft project number for dimensions
and weights for your SKV.
A
B
C

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Handling and Packaging
Handling
Always handle the SKV Evaporative Cooling Humidifier with care and keep within its original packaging for as
long as possible, prior to installation. It must be stored under cover and protected from any possible damage, from
dust, rain or frost.
Correct Lifting Method
Lifting or handling must only be carried out by trained and qualified personnel. Ensure that the lifting operation
has been properly planned, risk assessed and that all equipment has been checked by a skilled and competent
Health & Safety representative and that effective control measures are put in place.
WARNING. It is the customer's responsibility to ensure that operators are trained in handling heavy
goods and to enforce the relevant lifting regulations.
WARNING. Any personnel handling or lifting the SKV Evaporative Cooling Humidifier 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.
Refer to dimensions and weights as indicated on the SKV nameplate as well as the submittal drawing for system
dry weights.
Inspection
Upon receipt, and once packaging material has been removed, an inspection must be carried out to ensure that
no damage occurred during transit. Any damage should be reported with no delay to your Neptronic
representative.
Unpacking
Upon customer request and following transit maximum size for large dimension SKV Evaporative Cooling
Humidifier, evaporation media panels and evaporation module frames are delivered on a separate pallet. In this
case, the evaporation module will have to be assembled on site.
CAUTION. Risk of malfunction, evaporation media should not be cut or crushed during handling and
installation.
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Installation Overview
WARNING: Failure to observe manufacturer's installation recommendations will invalidate the
manufacturer’s warranty.
Local Regulations
Lifting or handling MUST be carried out by trained and qualified personnel. Ensure that the lifting
operation has been properly planned, assessed for risk and that the equipment has been checked by
a competent Health & Safety representative, and that effective control measures are in place.
It is the customer’s responsibility to ensure that the operators are trained in handling heavy goods and
to enforce the relevant lifting regulations.
The Evaporative Cooling Humidifier MUST always be handled and lifted with care and should remain
in its original packaging for as long as possible prior to installation.
The Evaporative Cooling Humidifier package may be carried using a forklift from the underside.
Caution should be exercised to ensure a balanced load before lifting.
List of Supplied Accessories
Water supply stainless steel reinforced hose 24" (600mm) along with 1/2’’ NPT (13mm) female hose
connection.
Water filter assembly, 5 microns PP pre-filter and silver ion dosing anti bacterial cartridges.
Installation Instructions and User Manual
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Installation Method Statement
Stage 1 – On Site Assembly of Evaporation Module
Stage 2 – Evaporation Module Positioning and Mounting
Stage 3 – Water Supply Installation
Stage 4 – Drain and Overflow Connections
Stage 5 – Power Supply Connections
Stage 6 – Electrical Control Connections
Stage 7 – SKV Controller Installation and Configuration
Illustration 4 - Installation Stages
Stage 5
Power Supply Connections
Stage 2
Positioning and Mounting
Stage 4
Water Drain and Overflow
Connections
Stage 3
Water Supply Installation
Stage 1
Assembly on Site of
Evaporation Module
Stage 6
Electrical Control Connections
and Controller Installation
Stage 7
SKV Controller Configuration

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Stage 1 – On Site Assembly of Evaporation Module
On site assembly of the SKV evaporation module is necessary when its height and width are incompatible with
maximum shipping dimensions.
CAUTION. Risk of injury. Some sheet metal parts might present sharp edges and some handling and
assembly will require working with a ladder. We recommend wearing protective gloves and any
appropriate other protective equipment during handling and assembly of the SKV evaporation module.
We recommended installing the SKV evaporation module into a waterproof AHU or duct section. The SKV
evaporation module is a self-contained humidifier/cooler however; leaks might occur at the water and drain
connection point.
WARNING: Risk of malfunction. SKV evaporation module must be level in the 2 plan
directions.
Bottom tank, main support beam and pump skid will usually be pre-assembled at the factory before delivery.
However, the main support beam for the evaporative media panels as well as the pump skid can be easily
removed and re-installed as indicated in steps 1 and 9. Tools required:
Philips screw driver size #2 & #3
Wrench sizes 7/16’’ (11mm) and 5/16’’ (8mm)
Level
Illustration 5 - Evaporation Module Assembly
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1A
1B
1C
2A
2B
2C
3A
3B
3C
4A
4B
4C
5A
5B
5C
6A
6B
6C
Step 1
Main support beam
(factory assembled)
Step 2
Side frame sections
(factory assembled if H=W)
Step 3
Side frames (x2)
Step 4
Top frame
Step 5
Media panels
Step 7
Holding rail (1 per level)
Step 8
Water distribution drawers
Step 9
Pump skid assembly
(factory assembled)
Step 10
Drain manifold assembly
(factory assembled)
Step 6
Panel link bracket
(at least 1 per level)
Step 11
Water distribution hoses
(1 per drawer)

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Step 1 (optional): Main Support Beam
The evaporation media panel’s main support beam is assembled at the factory. However its position can be
adjusted depending on the evaporative media panels’ depth. To do so, remove the screws’ protective caps and
remove the Philips screws. Adjust, re-install the screws and re-insert the protective caps.
Step 2 (optional): Side Frame Sections
If the height of the evaporation module is greater than its width, assemble the side frame section along with the
holding rail support. Install the four lock washers and nuts and then tighten using a 7/16’’ (11mm) wrench.
Step 3: Side Frames
Assemble the two side frames onto the bottom tank. Install the six lock washers and nuts on each side and then
tighten using a 7/16’’ (11mm) wrench.
Step 4: Top Frame
Install the top frame onto the two side frames.
CAUTION. This part can be very long and might require the help of 2 people to be safely installed.
Install the three lock washers and nuts on each side. Do not tighten the nuts, as a final adjustment of the
assembly will be required after all the media panels and water distribution drawers are installed at steps 5 and 8.
Step 5: Media Panels
Install the media panels onto the evaporation module frame. We recommended installing them row by row, and
not column by column. Make sure that each media panel is properly installed into the one below.
Step 6: Media Panel Link Bracket
Install at least one media panel link bracket per level. This bracket is designed to re-enforce the structure by
holding together the media panel and holding rail. Loosen the top two Philips screws from adjacent media panel
frames, insert the bracket, and then tighten the two Philips screws.
Step 7: Holding Rail
Install one holding rail per level. Insert the holding rail onto at least one link bracket and engage the latches into
the holding rail supports on both sides.
Note: In case the SKV evaporation module is equipped with a droplet separator (air velocity above
600FPM), repeat steps 5 to 7 for the installation of droplet separator panels.
Step 8: Water Distribution Drawers
Install the water distribution drawers onto the top frame (step 4) and adjust the top frame position to ensure proper
sliding of the drawers. Confirm proper positioning of the top frame (step 4) and tighten the three nuts on each side.
Step 9 (optional): Pump Skid
The pump skid assembly is installed at the factory before shipping. If you need to remove it, first disconnect the
electrical quick connector of the drain and then remove the Philips screw.
Step 10 (optional): Drain Manifold
The drain manifold assembly is installed at the factory before shipping. If you need to remove it, disconnect the
drain hose from the bottom tank, and open the clamp maintaining the drain manifold assembly by removing the
5/16’’ (8mm) nut. The drain manifold assembly can be directed either on the right-hand side (by default) or on the
left-hand side of the bottom tank.
Step 11: Water Distribution Hoses
Install the water distribution hoses between the top drawers and the circulation pump manifold or solenoid valve
outlets, by pushing each hose into the push-in connectors.
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Stage 2 – Evaporation Module Positioning and Mounting
General Considerations
Consider the following points before deciding the location for the Evaporative Cooling Humidifier steam
distribution system:
Plan a location that is easy to access and permits an easy inspection and servicing of the Evaporative
Cooling Humidifier.
Do not install the Evaporative Cooling Humidifier where failure of the appliance could cause damage
to the building structure or to other expensive equipment.
Verify that the construction of the duct or AHU wall is suitable to support the maximum weight when
the evaporation module is wet.
We recommend installing the SKV evaporation module into a waterproof AHU or duct section. The
SKV evaporation module is a self-contained humidifier/cooler however; leaks might occur at the water
and drain connection point. Install a drain outlet connection at its lowest point within the cooling or
humidification section.
Construct the drain pipe in such a way that there is no water accumulation and stagnation.
Make provision either on one side or both sides of the AHU or duct for water supply, drain line(s), and
electrical conduit to the evaporation module.
The SKV Evaporative Cooling Humidifier accepts the water supply, drain, overflow piping, and
electrical connections from the right-hand or left-hand side of the evaporation module.
Positioning the Evaporation Module
Level the evaporation module properly in order to ensure proper distribution of water (see Illustration
6 - Positioning and Mounting). Make sure that the drain outlet is at the lowest point of the unit.
Do not leave any empty space around the evaporation module. In case there is some empty space,
install blanking plates to prevent air passage.
The unit is custom made to fit the AHU or duct dimension however; to allow easy installation and service a
space of 2in (51mm) on both sides and 2in (51mm) on top of the evaporation must be planned.
Provide a minimum access of 24" (600mm) downstream of the evaporation module for installation,
inspection, commissioning, and maintenance. Also provide the same clearance, 24" (600mm)
upstream, for easy commissioning and maintenance.
Provide access to the sides of the unit through doors.
Illustration 6 - Positioning and Mounting
Mounting the Evaporation Module
Secure the evaporation module to the AHU or duct by screws and bolts (not supplied) of suitable size.
Attach the evaporation module in such a way that it will not vibrate or move under air velocity and
pressure.
Level in this direction
Level in this direction
Attachment point
(x4)

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Stage 3 – Water Supply Installation
Illustration 7 - Water Supply Installation
Note: Do not over tighten hose fittings as this may damage the seals.
Install an isolation valve (not supplied) on the water line near the evaporative module's inlet for easy
maintenance and servicing. We recommend fitting a pressure gauge for commissioning and
maintenance.
Flush the water line thoroughly before connecting the feed water pipe-work to the evaporation
module.
Follow the water supply specifications as mentioned below:
oWater Supply Size - Ø3/4’’(20mm), garden hose
oMaximum Water Supply Pressure - 70psi (4.8bar)
oMaximum Water Supply Temperature - 68°F (20°C)
Connect the humidifier to a clean drinking water supply.
oThe humidifier is capable of operating with a wide range of water qualities such as reverse
osmosis (RO), or tap water. If the humidifier is connected to hard water, it will result in scale
build-up on the evaporative module and will require frequent cleaning and replacement.
oIf the supplied water is treated with reverse osmosis or de-ionization filtration, control the total
dissolved solid contents in the water, otherwise water acts as a solvent agent resulting in
rapid evaporation and media degradation.
oWater conductivity of the water should be between 100 and 550 microS/cm at 68°F (20°C).
oFor direct feed, water conductivity should not be lower than 150 microS/cm at 68°F (20°C). If
it is lower, mix the treated water with tap water to achieve the recommended conductivity.
Alternatively, install SKV with recirculation (SKVR) and setup the dilution cycle accordingly.
Silver ion
dosing Prefilter 5µ
Water supply
Shut off valve
¾’’ G connection
S/S flexible hose 24in long supplied
½’’ female connection
Piping (not supplied)
Water pre-treatment
cartridge supplied
(not supplied)
To be installed outside of duct / AHU

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Stage 4 – Drain and Overflow Connections
Any installation work must be carried out by suitably qualified personnel.
Risk of flooding. Never connect drains to a closed pipe work. Always install a tundish to
provide a suitable air gap.
Recirculation Model Direct Feed Model
CAUTION: Do not combine the overflow and drain to a
common pipe if the width of the evaporation module is
below 30’’ (762mm) or, if the main drain has to be
lifted to the drain inlet of the building (if no slope can
be fitted).
CAUTION: Do not combine the
overflow and drain to a common pipe.
Two independent traps should be
installed for drain and overflow and
sized according to the Table 5 below.
Illustration 8 - Drain and Overflow Connections
Table 4 - P Trap Installation
Drain Type P Trap Recirculation Direct Feed
Main drain separated Required if there is no drain pump x
Overflow separated Always required x
Main drain and
overflow combined
to a common pipe
Always required

if evaporation module over
30” (762mm) or if main drain
is not lifted to drain inlet

Table 5 - Water Drain and Overflow Specifications
SKV
Model
Tank
width
Drain outlet
size
Overflow
outlet size Minimum slope Trap size
Recirculation
≤70’’ (1.8m) Ø ¾’’ (19mm) Ø1.5’’ (38mm) 2°or 1.4’’for every 3ft
of horizontal run.
(35mm for 1m run)
1’’ for every 1’’ w.c of static
pressure (25mm / 250Pa)
>70’’(1.8m) Ø ¾’’ (19mm) Ø2’’ (51mm)
Direct feed All Ø2’’ (51mm) Ø1.5’’ (38mm)
2°or 1.4’’for every 3ft
of horizontal run.
(35mm for 1m run)
25mm for every 250Pa of air
static pressure
For AHU or duct with negative pressure, specific precautions should be taken to isolate the drain line in order to
avoid any back flow.
Overflow
Main drain
Combined drain outlet can be
directed to right or left hand side
P trap height
H = 1'’ for 1'’ w.c.
stat. press.
Slope of 2º is required for overflow (gravity) drain
If no slope can be fitted, separate the 2 drain lines
Open drain is required
Main drain
Ø 2'’ (51mm)
Slope 2º minimum
from horizontal
Open drain
P trap Height
H= 1'’ for 1'’w.c.
stat. Press.
Safety overflow drain
Ø(38mm)
1-½’’
! !

Evaporative Cooling Humidifier
Installation Instructions and User Manual
www.neptronic.com Page | 12
Stage 5 – Power Supply Connections
WARNING. All work concerned with electrical installation should only be performed by skilled and
qualified technical personnel, such as electricians or technicians with appropriate training. The customer
is responsible for ensuring their suitability.
WARNING. Risk of electric shock. Isolate all power supplies before installation and maintenance of the
SKV Evaporative Cooling Humidifier.
Illustration 9 - Power Supply Connections
Table 6 - Power Supply Specifications
Model Voltage (V) Current (A)
SKVR
Recirculation model
120 – 1ph 5.5
240 – 1ph 3
SKVD
Direct feed model
120 – 1ph 1
240 – 1ph 0.5
You MUST externally fuse all incoming power supplies for over current protection.
Isolate the electrical supply for the purpose of emergencies and servicing. We recommend installing a disconnect
switch within 1m (3.3ft) of the humidifier. The isolator must have a contact separation of at least 1/8’’ (3mm).
Please observe local codes and regulations concerning the provision of electrical installations.
The installation engineer must ensure the following:
Use of copper power conductors only.
Size of the power conductors are suitable for the maximum current supplied.
Incoming power cable is secured via suitably sized cable gland.
Each terminal connection is secured firmly with a cable ferrule.
Humidifier cabinet has an uninterrupted or unbroken electrical ground. Do not use the evaporation
module’s frame to connect to ground.
120Vac or 240Vac 1ph 60Hz
as per voltage indicated on name plate
(by others)
Electrical box on evaporation
module
Power supply terminal
block
Power cable should
pass through water
tight bushing.

Evaporative Cooling Humidifier
Installation Instructions and User Manual
www.neptronic.com Page | 13
Stage 6 – Electrical Control Connections
WARNING. All work concerned with electrical installation should only be performed by skilled and
qualified technical personnel, such as electricians or technicians with appropriate training. The customer
is responsible for ensuring their suitability.
WARNING. Risk of electric shock. Isolate all power supplies before installation and maintenance of the
SKV Evaporative Cooling Humidifier.
Illustration 10 - SKV Controller Wiring Diagram
Safety Contact Connections
Airflow switch contact should be wired between terminals TB4 1&2. If this contact opens, operation of the SKV
unit will stop. The unit will display Airflow Switch open, but will not generate an alarm.
High limit humidistat contact should be wired between terminals TB4 1&3. If this contact opens, operation of the
SKV unit will stop and an Alarm message will be displayed.
Interlock switch can be wired between terminals TB4 1&4. If this contact opens, operation of the SKV unit will
stop and an Alarm message will be displayed.
SKV Master
PCB
TB3TB4TB5 TB2 TB1
TB6
SD1
LCD1
Air Flow Switch
High limit Humidistat
Interlock
On/Off demand contact
NO
NC
NO
NC
Alarm
contacts
Service
contacts
Common
24 Vac
(by others)
A+
B-
RS-485
(BACnet)
(by others)
24 Vac
purple
Micro SD
card
From TB 12-1 of 1st module
From TB 12-2 of 1st module
To TB 12-3 of 1st module
From TB 12-4 of 1st module
To TB 12-5 of 1st module
To TB 12-6 of 1st module
Analog
Inputs
(AI1 - AI3)
3
- +
21
Analog
Output
To enable BACnet,
insert jumper between
pins 3 & 5 of JP2
Connector to LCD PCB

Evaporative Cooling Humidifier
Installation Instructions and User Manual
www.neptronic.com Page | 14
On/Off Operation
For On/Off operation, connect the On/Off contact between TB4 1&5. If this contact opens, the SKV unit will turn
off. If this contact closes, the SKV unit will operate.
Modulating Operation
Analog
Whatever the source of the control signal (BMS, room or duct humidistat, room or duct thermostat, or a
combination) the signal(s) should be connected between Common and Analog input 1, 2 and/or 3. These analog
inputs are configurable at step 1A “Settings” of the Controls menu (see page 17).
BACnet (network)
If the control signal is from a BACnet network, the RS485 A+ & B- should be connected to network (TB5). The
network control signal will have to be selected at step 1A “Settings” of the Controls menu (see page 17). Also
refer to step 1E “BACnet” of the Controls menu (see page 17) to setup the communication parameters.
Mounting of the Enclosure
Illustration 11 - Mounting the Controller Enclosure