Neptronic SK300 series Manual

SK300-150814
Steam Humidifier
SK300 Series
Installation Instructions and User Manual

SK300 Steam 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 Steam Humidifier.
The strict application of these instructions will ensure the 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.
This product has been declared to conform to the applicable Canadian and American safety standards and directives
and bear the CSA (c) & (us) mark. The Certificate of Conformity, CSA is available, upon request with the
manufacturer.
2015©: 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.
Electricity
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 the local regulations concerning the provision of electrical installations.
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.
General Warranty
To view the complete Neptronic General Conditions of Sale and Warranty, go to www.neptronic.com/Sales-Conditions.

SK300 Steam Humidifier
Installation Instructions and User Manual
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Handling and Lifting
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 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 Steam 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 Steam Humidifier package may be carried using a forklift from the underside. Caution should be
exercised to ensure balanced load before lifting.
Unpacking
The Steam Humidifier is shipped inside carton boxes or in a wooden crate. Remove packing and skids prior to
commissioning.
Lists
Illustrations
Illustration 1 - Overview of the Humidifier ......................................................................................................................... 1
Illustration 2 - Steam Humidifier with Space Distribution Unit........................................................................................... 2
Illustration 3 - Weather Proof Enclosure............................................................................................................................ 3
Illustration 4 - Positioning the Humidifier........................................................................................................................... 4
Illustration 5 - Weather Proof Enclosure Unit .................................................................................................................... 6
Illustration 6 - Steam Absorption Manifold (S.A.M) Horizontal Duct ................................................................................. 6
Illustration 7 - Steam Absorption Manifold (S.A.M.E2) Horizontal Duct ............................................................................ 7
Illustration 8 - Steam Absorption Manifold (S.A.M. or S.A.M.E2 ) Vertical Duct ............................................................... 7
Illustration 9 - Multi Steam System.................................................................................................................................... 7
Illustration 10 - Duct Hole Dimensions and Minimum Distance ........................................................................................ 8
Illustration 11 - 1 ⅜’’ (35mm) Diameter Pipe Placement: Horizontal Duct ........................................................................ 9
Illustration 12 - 2 ⅛’’ (51mm) Diameter Pipe Placement: Horizontal Duct ........................................................................ 9
Illustration 13 - Eyelet Orientation ..................................................................................................................................... 9
Illustration 14 - 1 ⅜’’ (35mm) Diameter Pipe Placement: Vertical Duct .......................................................................... 10
Illustration 15 - 2 ⅛’’ (51mm) Diameter Pipe Placement: Vertical Duct .......................................................................... 10
Illustration 16 - Steam Output Connections: Typical Installation..................................................................................... 11
Illustration 17 - Steam Output Connection: Incorrect Installation.................................................................................... 11
Illustration 18 - Steam Separator (S trap) Installation ..................................................................................................... 12
Illustration 19 - SDU mounted on Humidifier................................................................................................................... 13
Illustration 20 - SDU Remote Installation ........................................................................................................................ 14
Illustration 21 - Plumbing Connections............................................................................................................................ 15
Illustration 22 - Water Supply Connections ..................................................................................................................... 16
Illustration 23 - Weather Proof Enclosure Plumbing: Front View .................................................................................... 17
Illustration 24 - Weather Proof Enclosure Plumbing: Side View ..................................................................................... 17
Illustration 25 - One and Three Phase Power Connections............................................................................................ 18
Illustration 26 - Low Voltage Control Connections .......................................................................................................... 19
Illustration 27 - Connection to HRO20 humidistat or HRO20 with remote humidity sensor (SHR10 or SHC80)............ 19
Illustration 28 - Humidity controlled by humidifier with SHR10 or SHC80 as space sensor ........................................... 20
Illustration 29 - VAV system with humidity controlled by humidifier using Hi limit sensor and space sensor................. 20
Illustration 30 - Humidity Signal 0-10 Vdc ....................................................................................................................... 21
Illustration 31 - Humidity Signal 2-10 Vdc ....................................................................................................................... 21
Illustration 32 - Humidity Signal 4-20 mA ........................................................................................................................ 21
Illustration 33 - Control Signal 0 to 10 Vdc...................................................................................................................... 22
Illustration 34 - Control Signal 2 to 10 Vdc...................................................................................................................... 22
Illustration 35 - Control Signal 4-20 mA .......................................................................................................................... 22
Illustration 36 - Common Alarm Connections.................................................................................................................. 23
Illustration 37 - Controls Placement (Steam Dispersed into a Duct or AHU) .................................................................. 23
Illustration 38 - Display Features: Front Panel ................................................................................................................ 24
Illustration 39 - Main PC Board ....................................................................................................................................... 28
Illustration 40 - Metal deposit dislodge during operation................................................................................................. 32

SK300 Steam Humidifier
Installation Instructions and User Manual
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Illustration 41 - Water Level Sensor ................................................................................................................................ 32
Illustration 42 - Water Level Sensor and Protection Chamber........................................................................................ 33
Illustration 43 - Exploded View of Humidifier................................................................................................................... 35
Tables
Table 1 - Dimensions and Weight of SDU ........................................................................................................................ 2
Table 2 - Weather Proof Enclosure: Dimensions and Weight........................................................................................... 3
Table 3 - Output and Power Consumption........................................................................................................................ 3
Table 4 - Dimensions for Drilling Holes............................................................................................................................. 5
Table 5 - Recommendation for S.A.M Distribution Pipes.................................................................................................. 8
Table 6 - Dimensions for Plumbing Connection.............................................................................................................. 15
Table 7 - Humidifier Front Panel Display Description ..................................................................................................... 24
Table 8 - Scroll Mode Display Description ...................................................................................................................... 25
Table 9 - Diagnostic Mode Display Descriptions............................................................................................................. 26
Table 10 - Model Description and Part Numbers ............................................................................................................ 36
Table 11 - Model, Heater Element, Transformer, and Voltage Description .................................................................... 37
Contents
Handling and Lifting ........................................................................................................................................................ii
Overview............................................................................................................................................................................ 1
List of Accessories Supplied.......................................................................................................................................... 1
Visual Overview ............................................................................................................................................................. 1
Available Options........................................................................................................................................................... 1
Description of Components ........................................................................................................................................... 2
Humidifier with Space Distribution Unit ......................................................................................................................... 2
Dimensions and Weight ............................................................................................................................................. 2
Weather Proof Enclosure............................................................................................................................................... 3
Weather Proof Enclosure - Dimensions and Weight.................................................................................................. 3
Output and Power Consumption - Humidifier ................................................................................................................ 3
Mechanical Installation ...................................................................................................................................................... 4
General Recommendations ........................................................................................................................................... 4
Location...................................................................................................................................................................... 4
Positioning.................................................................................................................................................................. 4
Wall Mounting............................................................................................................................................................. 5
Positioning and Mounting – Weather Proof Enclosure Unit .......................................................................................... 6
General Recommendations ....................................................................................................................................... 6
Steam Dispersion System ............................................................................................................................................. 6
Steam Dispersion System Selection.......................................................................................................................... 6
Positioning S.A.M and S.A.M.E2................................................................................................................................ 8
Placement of Steam Pipe in Horizontal Duct ............................................................................................................. 9
Placement of Steam Pipe in Vertical Duct ................................................................................................................. 9
Steam Output Connections ............................................................................................................................................. 11
Installation.................................................................................................................................................................... 11
General Recommendations ......................................................................................................................................... 11
Position of Steam Output............................................................................................................................................. 12
Small Cabinet ........................................................................................................................................................... 12
Medium Cabinet ....................................................................................................................................................... 12
Large Cabinet........................................................................................................................................................... 13

SK300 Steam Humidifier
Installation Instructions and User Manual
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Installation - Humidifier with SDU ................................................................................................................................ 13
Remote Installation of SDU...................................................................................................................................... 14
Maintenance of the SDU .......................................................................................................................................... 14
Plumbing Connections .................................................................................................................................................... 15
Water Supply ............................................................................................................................................................... 15
Water Connections ...................................................................................................................................................... 16
Drain Connections ....................................................................................................................................................... 16
Weather Proof Enclosure Plumbing Connection ......................................................................................................... 17
Power Supply Connections ............................................................................................................................................. 18
Low Voltage Control Connections ............................................................................................................................... 19
ON/OFF Humidifier .................................................................................................................................................. 19
Modulating Humidifier .............................................................................................................................................. 19
Common Alarm Connections ................................................................................................................................... 23
Controls Placement (Steam Dispersed into a Duct or AHU) ................................................................................... 23
Display............................................................................................................................................................................. 24
Front Panel .................................................................................................................................................................. 24
Modes – Description .................................................................................................................................................... 25
OFF Mode ................................................................................................................................................................ 25
Scroll Mode .............................................................................................................................................................. 25
Diagnostic Mode....................................................................................................................................................... 26
Programming Mode.................................................................................................................................................. 26
Control P.C. Board .......................................................................................................................................................... 28
Main P.C. Board........................................................................................................................................................... 28
Modulating P.C. Board................................................................................................................................................. 29
Start-up Procedure .......................................................................................................................................................... 29
Service............................................................................................................................................................................. 30
Clean the Evaporation Chamber ................................................................................................................................. 30
Exploded View and Bill of Material.................................................................................................................................. 35
Exploded View ............................................................................................................................................................. 35
Bill of Material .............................................................................................................................................................. 36
Troubleshooting............................................................................................................................................................... 38
Notes ............................................................................................................................................................................... 43

SK300 Steam Humidifier
Installation Instructions and User Manual
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Overview
List of Accessories Supplied
The following accessories are supplied with the SK300 Steam Humidifier:
2 sets of keys.
2 adjustable collars for the connection of the steam hose for each steam output.
1 female compression fitting ¾ (19mm) hydraulic for the drain output of the evaporation chamber.
1 female compression fitting ½ (13mm) hydraulic for the drain output of the drip pan.
1 female fitting and a braided hose for the water supply connection.
1 Installation Instructions and User Manual.
Visual Overview
Illustration 1 - Overview of the Humidifier
Available Options
The following options are available when purchasing a SK300 humidifier:
Model Description
Suffix M (SK320M) Modulating control humidifier
SF DI-APPLICATION Humidifier for a system supplied with Deionised water or Reverse Osmosis water,
dissolved solids more than 1 ppm
SF ULTRAPURE-DI Humidifier for a system supplied with Deionised water or Reverse Osmosis water,
dissolved solids more than 0.028 ppm
SDU-REM Space Distribution Unit mounted on humidifier (SDU) or remote installation
Suffix B (SK320M-600-3B) Network Communication System - BACnet
SK320M-600-3P Stainless steel humidifier cabinet
SF SK300 FANRELAY Dry contact to activate an external fan relay on a call for humidity
Access door to
mechanical
compartment
Heater element
connector
Heater element
Level sensor
chamber
Water supply valve
Electrical
compartment
Evaporation
chamber
Control panel
neptronic
Evaporation
chamber
drain pump
Internal Drain
Cooler chamber

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Installation Instructions and User Manual
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Description of Components
Evaporation Chamber. Assembly includes a metal cylinder and a cover equipped with one or several
heater elements. It is the most important part of the humidifier, which produces the steam.
Space Distribution Unit (SDU). Integrated steam distribution unit, optional on certain humidifiers.
Multi-Steam System. Custom made system for steam distribution. This system is designed to allow very
short absorption distances (less than 3 feet or 900mm) applications.
Steam Absorption Manifold (S.A.M.). Steam manifold adapted to air duct size, allows steam absorption in
relatively short distance (less than 5 feet or 1500mm) applications.
Steam Absorption Manifold with 2 Eyelets (S.A.M.E2). Steam manifold with two eyelets, adapted to
applications with restricted air duct dimensions that allow steam absorption in relatively short distance
(less than 5 feet or 1500mm) applications.
Humidifier with Space Distribution Unit
Illustration 2 - Steam Humidifier with Space Distribution Unit
Dimensions and Weight
Table 1 - Dimensions and Weight of SDU
Model Dimensions of the Cabinet inch (mm) SDU lb
(kg)
A B C D E Weight lb (kg)
Empty Full
SK302
23 ½ (597) 18 ½ (470) 11 ½ (292) 5 ⅝(140) 29 ⅛(737) 44 (20) 57 (26) SDU-1
20 (9)
SK304
SK306
SK310 28 ½ (724) 21 (533) 12 ½ (318) 6 ⅝(165) 35 ⅛(890) 66 (30) 115 (52) SDU-2
25 (11)
SK314
SK320 28 ½ (724) 21 (533) 12 ½ (318) 12 ⅞(324) 41 ⅜(1048) 66 (30) 115 (52) SDU-3
45 (20)
SK330
SK340 31 ¼ (794) 32 (813) 12 ½ (318) - - 110 (50) 205 (93) -
SK360

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Installation Instructions and User Manual
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Weather Proof Enclosure
Illustration 3 - Weather Proof Enclosure
Weather Proof Enclosure - Dimensions and Weight
Table 2 - Weather Proof Enclosure: Dimensions and Weight
Model Dimensions of the Cabinet inch (mm)
A B C Weight lb (kg)
Empty Full
SK302
SK304
SK306
28.5 (724) 25.8 (655) 11.3 (287) 66 (30) 79 (36)
SK310
SK314
SK320
SK330
34.5 (876) 29.8 (757) 13.3 (338) 95 (43) 144 (65)
SK340
SK360 34.5 (876) 40.8 (1036) 13.3 (338) 165 (75) 260 (118)
Output and Power Consumption - Humidifier
Table 3 - Output and Power Consumption
Model Steam Consumption Steam Output
Capacity
lb/hr (kg/hr) Power (KW) Amperage (A) Qty Diameter inch (mm)
240/1 208/1 208/3 480/1 480/3 600/1 600/3
SK302 6 (2.7) 2 8.5 10 -4.5 - 3.5 - 1 1 ⅜(35)
SK304 12 (5.5) 4 17 19 11.5 8.5 5 7 4 1 1 ⅜(35)
SK306 18 (8) 6 26 30 16.5 13 7.2 10.5 6 1 1 ⅜(35)
SK310 30 (14) 10 - - 28 - 12 - 10 1 1 ⅜(35)
SK314 40 (19) 13.5 - - 38 - 16.5 - 13.5 1 1 ⅜(35)
SK320 60 (28) 20 - - - 25 - 20 2 1 ⅜(35)
SK330 90 (41) 30 - - - - 36 - 30 2 1 ⅜(35)
SK340 120 (56) 40 - - - 50 - 40 2 2 ⅛(54)
SK360 180 (82) 60 - - - - 72 - 60 3 2 ⅛(54)
Available, consult factory.
Note: Program maximum steam output using the Lock On function in Program Mode on Modulating Humidifier.
WARNING: For Modulating Humidifier, maintain the maximum power of the electrical installations
according to the information in the Table 3 - Output and Power Consumption.
Do not consider a possible reduction of steam output due to modulation.
A
B
C
Main drain 3/4" (20mm)
Pan drain 1/2" (15mm)
Supply water 1/2" NPT
(15mm )
Power supply
(knockout hole)
Electrical control
(knockout hole)
Heat sink for
modulating units only
Steam outlet
Alphanumeric
display window

SK300 Steam Humidifier
Installation Instructions and User Manual
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Mechanical Installation
General Recommendations
WARNING: Risk of electric shock. Disconnect the appliance from electric supply before
commencing installation.
Note: Mechanical installation should conform to local codes and regulations.
Location
WARNING: The SK300 series humidifiers are designed for indoor installation only. For outdoor
installation, the SK300 must be installed using a Neptronic weather-proof enclosure (see
Positioning and Mounting – Weather Proof Enclosure Unit on page 6). Failure to follow these
guidelines will void the warranty.
Consider the following points before deciding the location for the SK300 Steam Humidifier:
Plan a location that is easy to access and permits an easy inspection and servicing of the humidifier.
Do not install the humidifier where failure of the appliance could cause damage to the building structure or
to other expensive equipment.
The location should be well ventilated and the ambient temperature should not exceed 30°C (85°F).
Consider the total steam line length between the humidifier and the steam distributor based on the steam
line material type:
oFor flexible steam hose, total steam line should not exceed 16 feet (5 meters). For longer distances, use insulated
hard piping.
oFor insulated hard piping, the total steam line is determined by the humidifier capacity: one equivalent foot for each
lb/h capacity of the humidifier (0.67m for each kg/h), with a maximum of 50 feet (15m). For longer steam line runs,
consult factory.
Positioning
The front panel and the right side (electrical compartment) should be accessible in order to permit
servicing.
Leave a clearance of at least 48” (1.25m) to the front panel and 24” (0.6m) to the right side.
Mount the humidifier at a minimum height of 39” (1m) to 48” (1.2m) above floor level.
Leave a clearance of at least 10” (0.25m) under the humidifier for installation of water supply, drain piping,
and electrical connections.
Illustration 4 - Positioning the Humidifier
(0,60 m)
(0,25 m) (1 to 1,2 m)
10'’
24'’
39 to 48'’

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Wall Mounting
Caution: Risk of malfunction. The humidifier must be placed at an equal level.
Caution: Risk of overheating. Do not block the ventilation openings located on the top, front,
sides, and rear of the cabinet.
Check the strength of the chosen support or wall (bricks, concrete, stud partition wall) on which the humidifier will be
mounted. See the Dimensions and Weight section to know the weight of the unit.
Use the keyholes located on the back panel of the humidifier.
Before proceeding to perform the wall mounting, take off the Evaporation Chamber sub-assembly (see
Service section).
Drill holes for the upper anchors (holes with eyelet) into the support or wall as per dimensions specified in
Table 4 - Dimensions for Drilling Holes.
The holes dimensions (diameter and depth) should by in accordance with the recommendations of the
chosen anchors.
Table 4 - Dimensions for Drilling Holes
Model Dimensions in inches (mm)
A B C D E F G
SK302
SK304
SK306
-8 (202) 5 3/16 (165) 19 ¾ (516) ---
SK310
SK314
SK320
SK330
-10 (254) 8 (203) 24 ⅝(625) 11 (276) 8 (203) 10 (254)
SK340
SK360 4 (102) 12 (305) 10 ½ (265) 27 ½ (698) 11 (276) 22 43/64 (576) -
Install bolt anchors, if required.
Screw-on the 2 or 3 upper screws (holes with eyelet) of a minimum diameter of #10 (6mm) (screws are not
supplied).
Leave a clearance between head screws and the wall, in order to permit the mounting of the humidifier.
Use the keyholes located on the back panel of the humidifier.
Hang the humidifier on 2 or 3 screws. It is preferable to keep the front door open during this operation.
Based on the size and weight of the humidifier, you may need the help of another person.
When the humidifier is positioned on the upper screws, tighten the screws to secure the humidifier.
If applicable, install and secure lower screws.

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Positioning and Mounting – Weather Proof Enclosure Unit
Illustration 5 - Weather Proof Enclosure Unit
General Recommendations
Plan a location that is easy to access and permits an easy inspection and servicing of the humidifier.
Do not install the humidifier where failure of the appliance could cause damage to the building structure or
to other expensive equipment.
Maintain the following minimum clearances while installing to enable access for inspection and servicing.
Side Minimum Clearance
Top 20’’ (51 cm)
Both sides 24’’ (60 cm)
Front 42’’ (107 cm)
The humidifier is designed to be installed directly on the floor/roof or a curb.
Provide a level, solid foundation for the humidifier.
Ensure that the floor/roof beneath the humidifier is water proof to withstand any water spillage during
servicing or if a problem occurs.
Attach the SK enclosure securely and safely.
Steam Dispersion System
Steam Dispersion System Selection
In order to prevent the accumulation of condensation in air ducts, Neptronic has designed four basic configurations of
steam distribution systems to provide you with the most economical solution for any particular application.
Steam Absorption Manifold (S.A.M) Horizontal Duct
The S.A.M system is suitable for installations where absorption distances are short, less than 5 feet (1500mm), and/or
low duct temperatures are in effect.
Illustration 6 - Steam Absorption Manifold (S.A.M) Horizontal Duct
20" (51cm)
minimum
24" (60cm)
minimum
42"(107cm)
minimum
24"(60cm)
minimum
air

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Steam Absorption Manifold (S.A.M.E2) Horizontal Duct
The S.A.M.E2 system is suitable for installations where absorption distances are short, less than 5 feet (1500mm)
and/or low duct temperatures are in effect. SAME2 are used in applications with restricted duct dimensions.
Illustration 7 - Steam Absorption Manifold (S.A.M.E2) Horizontal Duct
Steam Absorption Manifold (S.A.M. or S.A.M.E2 ) Vertical Duct
S.A.M or S.A.M.E2 systems for vertical ducts are used where the absorption distances are normal and the requirement
is for an economical and efficient solution.
Illustration 8 - Steam Absorption Manifold (S.A.M. or S.A.M.E2 ) Vertical Duct
Multi Steam System
The Multi-Steam system should be installed in critical locations in air handling systems, particularly where absorption
distances are very short, less than 3 feet (900mm), or low air duct temperatures are in effect. The Multi-Steam is
custom made to the dimensions of duct or AHU.
Instructions to install Multi-Steam system are described in a specific installation instructions manual enclosed with the
Multi-Steam system.
Illustration 9 - Multi Steam System
900
air
S.A.M.
S.A.M.E2.
45°
45° 45°
air
air
air

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Positioning S.A.M and S.A.M.E2
Duct Mounting
Steam manifold should be mounted and secured through the side of the air handling unit or duct. Provision should be
made for safe accessibility, ideally with an observation light and window. Ensure that the construction of the duct wall
is suitable enough to support the steam pipe for the duration of the installation life.
Dimension of hole size in the duct must be as follows:
Steam Manifold Ø Hole Size ØA
1 ⅜’’ (35mm) 2’’ (51mm)
2 ⅛’’ (51mm) 3’’ (78mm)
Illustration 10 - Duct Hole Dimensions and Minimum Distance
WARNING: Risk of condensing. Ensure that the minimum distance at the end of the manifold
is at least 4" (102mm) from the top of the duct.
Recommendation for S.A.M Distribution Pipes
Table 5 - Recommendation for S.A.M Distribution Pipes
Model
Max Capacity Outlet Distribution Pipes Max Static Pressure
lb/hr kg/hr Qty Diameter Min
Length Max Length
in (mm) in (mm) in (mm) in. of
water (Pa)
SK302 6 2.7
1
1 ⅜(35)
12 (300) 24 (600)
5 1245
SK304 12 5.5
SK306 18 8
SK310 30 14
24 (600) 48 (1200)SK314 40 19
SK320 60 28
2SK330 90 41
32 (750) 64 (1500)SK340 120 56 2 ⅛(51)
SK360 180 82 3
For higher static pressure, contact the manufacturer.
5'’
(120mm)
5'’
(120mm)
ØA
4'’ minimum
(102mm)

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Placement of Steam Pipe in Horizontal Duct
1 ⅜’’ (35mm) Diameter Pipe
1 Pipe 2 Pipes
Illustration 11 - 1 ⅜’’ (35mm) Diameter Pipe Placement: Horizontal Duct
2 ⅛’’ (51mm) Diameter Pipe
2 Pipes 3 Pipes
Illustration 12 - 2 ⅛’’ (51mm) Diameter Pipe Placement: Horizontal Duct
Note: 2 ⅛’’ (51mm) steam pipe must be supported on the end by appropriate duct hanger or strap (supplied by
others).
Placement of Steam Pipe in Vertical Duct
Eyelet Orientation
Illustration 13 - Eyelet Orientation
H
10'’ minimum
(250mm)
1/3 H
air air
H
10'’ minimum
(250mm)
3'’ minimum
(80mm)
8'’
(200mm)
6'’ minimum
(150mm)
H
10'’ minimum
(250mm)
1/3 H
air H
24'’ minimum
(600mm)
1/5 H
2/5 H
8'’
(200mm)
air
air
air
45°
air
45°
S.A.M S.A.M.E2

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1 ⅜’’ (35mm) Diameter Pipe
1 Pipe 2 Pipes
Illustration 14 - 1 ⅜’’ (35mm) Diameter Pipe Placement: Vertical Duct
2 ⅛’’ (51mm) Diameter Pipe
2 Pipes 3 Pipes
Illustration 15 - 2 ⅛’’ (51mm) Diameter Pipe Placement: Vertical Duct
W
10’’ minimum
(250mm)
1/2 W
W
24’’ minimum
(600mm)
1/2 W 1/4 W1/4 W
W
24’’ minimum
(600mm)
1/2 W 1/4 W1/4 W
W
36’’ minimum
(900mm)
1/3 W 1/3 W
1/6 W 1/6 W

SK300 Steam Humidifier
Installation Instructions and User Manual
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Steam Output Connections
Installation
Illustration 16 - Steam Output Connections: Typical Installation
General Recommendations
Follow these general installation rules in order to avoid any condensation accumulation, which can cause severe water
accumulation in the duct or a humidifier malfunction.
Caution: Risk of malfunction. Avoid kinks, sags, and areas where condensate can be trapped.
The slope of the steam hose (rigid or flexible) should not be less than 15% (7 horizontal lengths for 1
vertical length) in order to ensure continuous drainage of condensation back to humidifier or to a steam
trap.
The lowest point of any steam hose or rigid pipe must be the humidifier. If the humidifier cannot be the
lowest point of the piping, install a steam trap(s) (S Type) at the lowest point(s) of the steam supply piping.
The steam separator (S trap) should be installed higher than the static pressure of the system by at least
2” (51 mm).
Illustration 17 - Steam Output Connection: Incorrect Installation
15 %
2
2
2
4
4
3
3
5
1
1
1
6
Humidifier
1 Clamps
2 Flexible Hose
3 Rigid Copper Pipe
4 Insulation
5 Steam Distribution Manifold
6 Duct
7 Long Radius Copper Pipe

SK300 Steam Humidifier
Installation Instructions and User Manual
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Illustration 18 - Steam Separator (S trap) Installation
The total length of the steam hose or rigid pipe should not exceed 16 feet (5 meters). Longer runs will
result in added condensation losses and may result in system malfunction. Whenever possible, use
insulated copper piping. Flexible steam hose should be used for short runs (up to 16 feet or 5 meters) or
for interconnecting between the rigid pipes.
If you are using a rigid copper pipe, use insulation to diminish condensate build-up.
Position of Steam Output
Small Cabinet
Models I J
SK302
SK304
SK306
4 5/16 (110) 4 13/16 (122)
Medium Cabinet
Models K L M
SK310
SK314 - 4 (102) 5 5/8 (143)
SK320
SK330 5 9/32 (134) 4 (102) 5 5/8 (143)
Use ‘’S’’ separator when
the steam distributor is
lower than the humidifier
steam outlet
8'’
(203mm)
15%
8"
15% 15%
Use "S" separator
when ceiling space is
limited and you need
to create 15% slopes
Steam outlet

SK300 Steam Humidifier
Installation Instructions and User Manual
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Large Cabinet
Models N O P Q
SK340
SK360 7 (179) 7 (179) 5 3/16 (132) 5 11/16 (144)
Installation - Humidifier with SDU
The SDU should be installed in an environment where the air is relatively clean. This will avoid the blower
from getting clogged with dust.
The humidifier should be mounted such that the SDU fan section is at least 78” (2 meters) above the floor.
A minimum clearance of 18” (0.45 meters) from the ceiling should be allocated to avoid ceiling and wall
condensation.
If additional ventilation is not present, the fan should have a clearance from the ceiling of at least 54” (1.35
meters). Proper ventilation must be observed to avoid ceiling and wall condensation.
Illustration 19 - SDU mounted on Humidifier
18'’
(0,45 m)
78'’
(2 m)
Without
additional
ventilation
54'’ (1,35 m)

SK300 Steam Humidifier
Installation Instructions and User Manual
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Remote Installation of SDU
The SDU can be installed in a different location from the humidifier (remote SDU). Follow the piping recommendations.
Mount the SDU to the wall on brackets (not supplied); do not drill mounting holes through the cabinet of
the SDU.
Connect the steam hose(s) to the bottom inlet(s) of the SDU to the top of the steam outlet(s) of the
humidifier.
Secure the hose(s) with the supplied hose clamp.
Connect the condensate hose to the bottom of the SDU to an open drain.
Connect the electrical wires from the SDU to the top of the humidifier. Field wiring must conform to local
codes.
The fan of the SDU will operate for a period of four minutes after steam production has stopped to prevent
condensation.
Avoid any obstruction of the ventilation openings on top of the SDU.
Illustration 20 - SDU Remote Installation
Maintenance of the SDU
Clean the blower if there is an accumulation of dust.
18'’
(0,45 m)
78'’
(2 m)
Field piping
(not supplied)
Without
additional
ventilation
54'’ (1,35 m)
4'’
(0.10m)
Field wiring
(by others)
2nd pipe
for SDU2 or SDU3

SK300 Steam Humidifier
Installation Instructions and User Manual
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Plumbing Connections
Plumbing Installation should conform to Local and National Codes.
Any installation work must be carried out by suitably qualified personnel.
The SK300 humidifier can operate with soft or hard water. Therefore, for normal operation, pre-treatment of water is
not necessary.
Illustration 21 - Plumbing Connections
Table 6 - Dimensions for Plumbing Connection
Model Dimensions inches (mm)
A B C D E
SK302
SK304
SK306
6 ½ (165) 2 (51) 9 ⅛(232) 4 ⅛(105) 1 ¾ (44)
SK310
SK314
SK320
SK330
7 ¼ (184) 1 ¾ (44) 9 ¾ (248) 4 ⅛(105) 1 ¾ (44)
SK340
SK360 7 (179) 1 ¾ (44) 9 ¾ (248) 4 ⅛(105) 1 ¾ (44)
Water Supply
Water Inlet Specifications
oInlet water pressure: 10 to 70 psig (0.7 to 4.8 bars)
oMaximum temperature: 85°F (30°C) maximum
o3/8'' standard copper water line connection
A shutoff valve (not supplied) should be installed in the water supply line close to the humidifier to facilitate
servicing.
It is recommended to install a standard water strainer in the water supply line.
A
B
C
DE
Minimum
20"
(500mm) Minimum 8"
(200mm)
Minimumbuildingsidedrainof1-½"(40mm)Ø
SK300 Humidifier
3/4" (22mm) Ø
1/2" (15mm) Ø