Neptronic SKS4-100-SLP Manual

SKS4-CE-ESA-180911
Steam to Steam Humidifier
SKS4 Series
Installation Instructions and User Manual
READ AND SAVE THESE INSTRUCTIONS

SKS4 Steam to Steam Humidifier
Installation Instructions and User Manual
www.neptronic.com
Page | - 1 -
Safety
Steam or Hot Water (HTHW) Supply
All work concerned with Steam or High Temperature Hot Water (HTHW) supply
installation MUST only be performed by skilled and qualified technical personnel. The
customer is always responsible for ensuring the suitability of the technical personnel.
Please observe the local regulations concerning the provision of steam and/or hot
water installations.
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.
Health & Safety
Neptronic has considered the aspects of the design of their humidification systems to reduce as much
as possible the risk of Legionnaires’ disease and other similar conditions, but it is important that users
are also aware of their responsibilities.
To prevent the growth of Legionella, users are required to:
Avoid water temperature that favours the growth of Legionella (20-45˚C).
Avoid water stagnation.
Clean and disinfect the humidification system.
Have a competent person carry out a risk assessment of the water system supplying the
humidifier, to ensure that the water supply is of an acceptable quality.
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.
Access
The SKS4 electrical panel access door MUST never be left open, in order to avoid accidental access
to live electrical parts.
Water
Neptronic systems are designed to be used with mains, reverse osmosis, de-mineralized or partially
softened water. On no account must a user attempt to introduce any other fluid or chemical into the
system without first consulting Neptronic or its authorized distributor.
Water supply must not exceed the maximum pressure of 480 kPa, or the pressure limits laid out in the
Installation Instructions, and must comply with local regulations.

SKS4 Steam to Steam Humidifier
Installation Instructions and User Manual
www.neptronic.com
Page | - 2 -
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
SKS4 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 conform to applicable Canadian, American and European standards.
2018©: 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.
General Warranty
This product is subject to the terms and conditions described at http://www.neptronic.com/Sales-
Conditions.aspx.

SKS4 Steam to Steam Humidifier
Installation Instructions and User Manual
www.neptronic.com
Page | - 3 -
Contents
Safety...................................................................................................................................................1
Foreword..............................................................................................................................................2
Overview .................................................................................................................................................5
Handling and Lifting.............................................................................................................................5
List of Accessories Supplied................................................................................................................6
Other Related Documents ...............................................................................................................6
Technical Specifications......................................................................................................................6
SKS4 Nomenclature ........................................................................................................................6
Steam Output Capacities.................................................................................................................7
Steam Output Capacities for HTHW Supply....................................................................................8
Dimensions and Weight.....................................................................................................................10
Weather Proof Enclosure ..................................................................................................................11
Installation Overview.............................................................................................................................12
Installation Method Statement...........................................................................................................12
Installation Steps............................................................................................................................12
Step 1 - Unit Positioning and Mounting.................................................................................................13
Location.............................................................................................................................................13
Positioning.........................................................................................................................................14
Minimum Clearances.....................................................................................................................14
Ceiling Installation..........................................................................................................................14
Step 2 - Steam Distribution Pipe Installation.........................................................................................15
Fundamental Design Concepts.........................................................................................................15
Steam Dispersion System Selection .................................................................................................16
Steam Absorption Manifold (S.A.M.E2) Horizontal Duct ...............................................................16
Steam Absorption Manifold (S.A.M.E2) Vertical Duct ...................................................................16
Multi-Steam System.......................................................................................................................16
Steam Dispersion General Recommendations.................................................................................17
S.A.M.E2 System ..............................................................................................................................17
Positioning the S.A.M.E2...............................................................................................................17
Steam Pipe Work to Duct Connections with S.A.M.E2..................................................................19
Multi-Steam System ..........................................................................................................................20
Selection of Multi-Steam System...................................................................................................20
Steam Pipe Work to Duct Connections with Multi-Steam..............................................................21
Step 3 - HTHW / Raw Steam Supply Connection.................................................................................22
Union Dimensions and Installation....................................................................................................22
Typical Raw Steam Installation .........................................................................................................22
Steam Supply Size.........................................................................................................................23
Raw Steam Supply and Condensate Installation ..........................................................................23
Typical HTHW Installation.................................................................................................................24
HTHW Supply Size........................................................................................................................24

SKS4 Steam to Steam Humidifier
Installation Instructions and User Manual
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Page | - 4 -
HTHW Supply and Condensate Installation ..................................................................................24
Positioning the Control Valve ............................................................................................................24
Step 4 - Water Supply Installation.........................................................................................................25
Water Inlet Specifications..................................................................................................................25
Water Supply Line Installation...........................................................................................................25
Step 5 - Water Drain Connection..........................................................................................................26
Water Drain Specifications................................................................................................................26
Water Drain Installation .....................................................................................................................26
Stage 6 - Electrical Supply Connections...............................................................................................27
Electrical Power Supply.....................................................................................................................27
Step 7 - Electrical Control Connections ................................................................................................28
Printed Circuit Board .........................................................................................................................28
Safety Contact Connections..............................................................................................................29
Dry Contacts......................................................................................................................................29
Humidifier Control..............................................................................................................................30
Analog Signals...............................................................................................................................30
Humidity Control by Humidistat (External Mode)...........................................................................30
Humidity Control by Humidifier (Internal Mode).............................................................................31
Network Communication ...................................................................................................................32
Controls Placement (Steam Dispersed into a Duct or AHU).............................................................33
Steam Actuated Valve.......................................................................................................................34
Controller Configuration........................................................................................................................35
Control Panel Features......................................................................................................................35
Idle Screen ........................................................................................................................................36
Menu Access.....................................................................................................................................36
Menu Navigation and Configuration..................................................................................................37
Menu - General..............................................................................................................................38
Menu - User ...................................................................................................................................40
Menu - Service...............................................................................................................................41
Menu - Installation..........................................................................................................................42
Menu - Integration..........................................................................................................................44
List of Alarms.....................................................................................................................................46
Start-up Procedure................................................................................................................................47
Initial Verification ...............................................................................................................................47
Start-Up .............................................................................................................................................48
Service ..................................................................................................................................................49
Cleaning the Humidifier.....................................................................................................................49
Strainer Maintenance ........................................................................................................................51
Troubleshooting ....................................................................................................................................52
Notes.....................................................................................................................................................53

SKS4 Steam to Steam Humidifier
Installation Instructions and User Manual
www.neptronic.com
Page | - 5 -
Overview
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 SKS4 humidifier MUST be handled and lifted with care at all times and remain in
its original packaging for as long as possible, prior to installation.
The SKS4 humidifier package may be carried using a forklift from the underside.
Exercise caution before lifting to ensure that the load is balanced.
Lifting of the SKS4 humidifier MUST always be carried out using the appropriate
Neptronic Lifting bracket. The lifting sling angle must be greater than 30˚ to the
horizontal.
Refer to Dimensions and Weight section for system dry weights.
Slide lifting flap
here
Illustration 1 - SKS4 Humidifier Lifting Bracket
Unpacking
The SKS4 humidifier is shipped inside carton boxes or in a wooden crate. Remove packing and skids
prior to commissioning.

SKS4 Steam to Steam Humidifier
Installation Instructions and User Manual
www.neptronic.com
Page | - 6 -
List of Accessories Supplied
The following accessories are supplied with the SKS4 humidifier:
2 adjustable collars per steam outlet for the connection of the steam hose.
1 15mm NPT fitting for the water supply inlet.
1 strainer (option).
1 actuated control valve (AM060 actuator with globe valve) (option).
1 float and thermostatic steam trap for the condensate return (option).
1 Installation Instructions and User Manual.
Other Related Documents
Wiring diagram
Start-up check list
BACnet Communication Module User Guide (for humidifiers with BACnet option)
Modbus Communication Module User Guide (for humidifiers with Modbus option)
Technical Specifications
SKS4 Nomenclature
Model Heat
Exchanger
Type
Voltage
Code
SKS4 0 2 0 0 - CHP C
C = 230Vac 1ph
CHP
Maximum Capacities
Available maximum capacities
in kg/h at maximum
pressure/temperature
Copper High pressure
Material & Pressure Range of
Heat Exchanger
Code
-
SLP Stainless Low Pressure
Note: (HP) High Pressure = 689 kPa max
(LP) Low Pressure = 103.4 kPa max
Illustration 2 - SKS4 Humidifier Nomenclature

SKS4 Steam to Steam Humidifier
Installation Instructions and User Manual
www.neptronic.com
Page | - 7 -
Steam Output Capacities
Table 1 - Stainless Steel Heat Exchanger
Model*
Nb of
Heat
Exc.
Output Steam Capacity (kg/h)
for Supply Steam Pressure(2)
Steam
Outlet
Qty & Ø
(mm)
0.34 Bar
(34.5kPa)
0.55 Bar
(55.1kPa)
0.69 Bar
(68.9kPa)
0.83 Bar
(82.7kPa)
1.03 Bar
(103.4kPa)
SKS4-100-SLP
1
15
24
30
36
45
76
SKS4-130-SLP
1
19
31
39
47
59
76
SKS4-190-SLP
1
28
46
57
69
86
76
SKS4-290-SLP
1
44
70
87
105
132
100
SKS4-390-SLP
1
59
94
118
142
177
100
SKS4-500-SLP
1
76
121
151
182
230
125
SKS4-690-SLP
1
104
167
209
251
314
125
SKS4-950-SLP
1
144
230
287
345
432
(2x) 100
SKS4-1250-SLP
2
189
303
378
454
568
(2x) 125
Table 2 - Copper Heat Exchanger
Model*
Nb of
Heat
Exc.
Output Steam Capacity (kg/h)
for Supply Steam Pressure (2)
Steam
Outlet
Qty & Ø
(mm)
116˚C
121˚C
127˚C
138˚C
149˚C
160˚C
170˚C
0.69 Bar
(69kPa)
1.03 Bar
(103kPa)
1.37 Bar
(137kPa)
2.41 Bar
(241kPa)
3.44 Bar
(344kPa)
5.17 Bar
(517kPa)
6.89 Bar
(689kPa)
SKS4-200-CHP
1
18
30
39
69
99
150
200
(1x) 100
SKS4-333-CHP
1
29
50
66
116
166
249
333
(2x) 100
SKS4-667-CHP
2
59
100
132
231
331
499
667
(2x) 125
Note: (*) In-between capacity models are available upon request to factory.
1 - Power supply is 230Vac, 0.75A (50Hz).
2 - Raw steam or HTHW pressure at actual point of connection to humidifier.
3 - Maximum static duct pressure is 1.250 kPa. For higher static duct pressures, please
consult Neptronic or its authorized distributor.

SKS4 Steam to Steam Humidifier
Installation Instructions and User Manual
www.neptronic.com
Page | - 8 -
Steam Output Capacities for HTHW Supply
Table 3 - HTHW Supply Flow, Output Capacity and Pressure Drop
Model
Flow
Output Steam Capacity (Kg/hr) for HTHW
Peak Temperature and Pressure
Pressure
Drop
(kPa)
122ºC
130ºC
140ºC
150ºC
160ºC
170ºC
l/min
GPM
1.03
Bar
1.65
Bar
2.50
Bar
3.44
Bar
5.17
Bar
6.89
Bar
103kPa
165kPa
250kPa
344kPa
517kPa
689kPa
SKS4-200-CHP
181.6
40
172
2000
113.5
25
29
39
65
90
116
158
800
104.4
23
29
39
64
87
115
156
720
90.8
20
28
38
63
84
111
152
570
77.2
17
28
38
62
81
107
148
450
68.1
15
28
37
61
79
104
143
320
54.5
12
26
37
58
76
100
133
220
45.4
10
25
36
56
73
95
124
130
36.3
8
23
35
50
67
89
113
100
22.7
5
20
32
44
61
75
92
45
13.6
3
16
26
36
47
61
70
25
SKS4-333-CHP
272.4
60
287
2000
181.6
40
49
64
108
144
198
264
1000
113.5
25
46
63
101
133
174
238
450
104.4
23
45
62
100
131
171
234
350
90.8
20
44
61
98
127
166
222
250
77.2
17
43
61
94
122
160
208
150
68.1
15
41
60
90
118
154
198
120
54.5
12
38
59
85
112
144
180
90
45.4
10
35
56
80
107
135
166
60
36.3
8
33
53
72
100
122
150
35
22.7
5
27
44
60
78
102
117
12
13.6
3
21
35
54
68
88
90
-
SKS4-667-CHP
544.8
120
574
2000
363.2
80
98
128
216
288
396
528
1000
227.0
50
92
126
202
266
348
476
450
208.8
46
90
124
200
262
342
468
350
181.6
40
88
122
196
254
332
444
250
154.4
34
86
122
188
244
320
416
150
136.2
30
82
120
180
236
308
396
120
109.0
24
76
118
170
224
288
360
90
90.8
20
70
112
160
214
270
332
60
72.6
16
66
106
144
200
244
300
35
45.4
10
54
88
120
156
204
234
12
27.2
6
42
70
108
136
176
180
-

SKS4 Steam to Steam Humidifier
Installation Instructions and User Manual
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Page | - 9 -
SKS4-200-CHP capacity up to 172 kg/hr, depending on flow, peak temperature and
pressure drop.
SKS4-333-CHP capacity up to 287 kg/hr, depending on flow, peak temperature and
pressure drop.
SKS4-667-CHP capacity up to 574 kg/hr, depending on flow, peak temperature and
pressure drop.
Illustration 3 - SKS4 HTHW Pressure Drop vs. Flow
Pressure Drop vs. the Flow for SKS HTHW Units
1
10
100
1000
10000
110 100 1000
Pressure Drop (KPa)
Flow (UK Gallons)
SKS200
SKS333
SKS667

SKS4 Steam to Steam Humidifier
Installation Instructions and User Manual
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Page | - 10 -
Dimensions and Weight
C
D
2nd Steam Outlet on
SKS4-950 &1250-SLP,
SKS4-333 & 667-CHP
Control Panel
Raw Steam Inlet
Condensate
Return Outlet
H
I
Main Drain
Outlet
Water Supply
Inlet
F
G
E
Disconnect
Switch
2.8"
(7cm)
(28cm)
11.5"
B
A
Pan Drain
Outlet
Illustration 4 - SKS4 Humidifier Dimensions
Table 4 - Dimensions and Weight (Stainless Steel Heat Exchanger)
Model
Dimensions (cm)
Weight (kg)
A
B
C
D
E
F
G
1st
Heat
Exc.
2nd
Heat
Exc.
Empty
In
Operation
H1
H2
I1
I2
SKS4-100-SLP
50.2
116.2
66.5
110.6
17.8
5.7
25.4
26.9
-
120
221
20.2
-
SKS4-130-SLP
50.2
116.2
66.5
110.6
17.8
5.7
25.4
26.9
-
122
220
20.2
-
SKS4-190-SLP
58.0
116.2
74.7
118.7
17.8
5.7
29.9
27.9
-
141
263
19.9
-
SKS4-290-SLP
58.0
116.2
74.7
118.7
17.8
5.7
29.9
27.9
-
143
280
19.9
-
SKS4-390-SLP
69.6
152.7
69.5
113.3
18.0
10.3
40.5
30.0
-
179
376
20.5
-
SKS4-500-SLP
69.6
152.7
69.5
113.3
18.0
10.3
40.5
30.0
-
182
373
20.5
-
SKS4-690-SLP
78.3
152.7
87.3
131.1
18.0
10.3
45.7
33.8
-
213
501
24.5
-
SKS4-950-SLP
78.3
152.7
87.3
131.1
18.0
10.3
45.7
33.8
-
215
531
24.5
-
SKS4-1250-SLP
78.3
152.7
108.2
152.0
18.0
10.3
45.7
31.6
61.3
259
715
22.5
52.1
Table 5 - Dimensions and Weight (Copper Heat Exchanger)
Model
Dimensions (cm)
Weight (kg)
A
B
C
D
E
F
G
1st
Heat
Exc.
2nd
Heat
Exc.
Empty
In
Operation
H1
H2
I1
I2
SKS4-200-CHP
58.0
116.2
74.7
118.7
17.8
5.7
29.9
27.9
-
88
186
19.9
-
SKS4-333-CHP
69.6
152.4
69.5
113.3
18.0
10.3
40.5
30.0
-
118
355
20.5
-
SKS4-667-CHP
78.3
152.4
87.3
131.1
18.0
10.3
45.7
33.8
46.5
158
485
24.5
32.5

SKS4 Steam to Steam Humidifier
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Page | - 11 -
Weather Proof Enclosure
Drain Outlet
Raw Steam Inlet
Condensate
Return Outlet
Water Supply Inlet
Steam Outlet
B
A
D
E
CPower Supply and
Electrical Controls
Illustration 5 - Weather Proof Enclosure Dimensions
Table 6 - Weather Proof Enclosure Dimensions and Weight (Stainless Steel Heat Exchanger)
Model
Dimensions (cm)
Weight (kg)
A
B
C
D
E
Empty
In Operation
SKS4-100-SLP
117.2
116.6
130.9
216.5
214.9
256
357
SKS4-130-SLP
258
356
SKS4-190-SLP
277
399
SKS4-290-SLP
279
416
SKS4-390-SLP
315
512
SKS4-500-SLP
318
509
SKS4-690-SLP
127.5
127
184.2
216.5
214.9
394
682
SKS4-950-SLP
396
712
SKS4-1250-SLP
440
896
Table 7 - Weather Proof Enclosure Dimensions and Weight (Copper Heat Exchanger)
Model
Dimensions (cm)
Weight (kg)
A
B
C
D
E
Empty
In Operation
SKS4-200-CHP
117.2
116.6
130.9
216.5
214.9
224
322
SKS4-333-CHP
254
491
SKS4-667-CHP
127.5
127
184.2
216.5
214.9
339
666

SKS4 Steam to Steam Humidifier
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Page | - 12 -
Installation Overview
Installation Method Statement
WARNING: Risk of electric shock. Disconnect the appliance from electric supply
before commencing installation.
Note: All installation work must conform to local codes and regulations.
All work related to the installation of the SKS4 humidifier MUST only be performed by skilled
and qualified technical personnel (e.g. electricians, plumbers or technicians with appropriate
training).
The customer is responsible for ensuring their suitability.
For the installation of the SKS4 humidifier and its associated components, no special tooling
is required above that of a fitter’s toolkit.
Installation Steps
Step 1: Unit Positioning and Mounting
Step 2: Steam Distribution Pipe Installation
Step 3: Raw Steam Supply Connection
Step 4: Water Supply Installation
Step 5: Water Drain Connection
Step 6: Electrical Supply Connections
Step 7: Electrical Control Connections
Clean Steam Outlet(s)
Control Panel
Legs (Optional)
Water Supply Inlet
Main Drain Outlet
Power Supply and
Electrical Controls
Pan Drain Outlet
Illustration 6 - SKS4 Humidifier Overview

SKS4 Steam to Steam Humidifier
Installation Instructions and User Manual
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Page | - 13 -
Step 1 - Unit Positioning and Mounting
Location
WARNING: The SKS4 series is designed for indoor installation only.
Failure to follow these guidelines will void the warranty.
Consider the following points before deciding the location for the SKS4 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.
Ensure that the location is well ventilated and that the ambient temperature is less than
30°C.
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 must not exceed 5 meters. For longer
distances, use insulated hard piping.
oFor insulated hard piping, the total steam line is determined by the humidifier
capacity: 0.67m for each kg/hrcapacity of the humidifier, with a maximum of 15 m.
For longer steam line runs, consult factory.
The SKS4 humidifier must be installed in a way that ensures that the steam hose length is
kept to the shortest possible length.
The SKS4 humidifier must be installed with provision for the steam supply piping
connections and steam condensate trap installation.

SKS4 Steam to Steam Humidifier
Installation Instructions and User Manual
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Page | - 14 -
Positioning
The SKS4 humidifier can be provided with adjustable legs (optional) in order to ensure
proper level when installed directly on the floor. Provide a level, solid foundation for the
humidifier and ensure that the floor beneath the humidifier is water proof to withstand any
water spillage during servicing or in the event of a problem. Ensure that the humidifier is
properly attached through its legs using anchors to the floor.
The SKS4 humidifier must be properly levelled, in order to ensure proper return of
condensate through the heat exchanger.
Minimum Clearances
The following minimum clearances are indicated for inspection and servicing access. The
SKS4 humidifier is designed for a zero clearance to combustible materials.
Leave a clearance of at least 1 m to the front panel and 0.6 m on the left, right and back
sides of the humidifier.
Leave a clearance of at least 0.75 m on top of the humidifier.
30" (0.75m)
minimum
24" (0.6m)
minimum
24" (0.6m)
minimum
24" (0.6m)
minimum
39" (1m)
minimum
Illustration 7 - SKS4 Minimum Clearances (Floor Mounted)
Ceiling Installation
The SKS4-100 & 130-SLP and SKS4-200-CHP models can also be hung by the ceiling using the
appropriate lifting and hanging bracket. Provide the following clearances when hanging these models
to the ceiling:
27.4"
(69.5 cm)
7.6" (19 cm)
43.5"
(110 cm)
Lifting and
Hanging
Bracket
Rod and Nuts
3/8" (M10) minimum
Illustration 8 - Minimum Clearances for Models SKS4-100 & 130-SLP, SKS4-200-CHP (Ceiling
Mounted)

SKS4 Steam to Steam Humidifier
Installation Instructions and User Manual
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Page | - 15 -
Step 2 - Steam Distribution Pipe
Installation
Fundamental Design Concepts
Follow these general installation rules in order to avoid any restrictions inside the distribution pipes
and the humidifier, as well as condensation accumulation, which can lead to 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 minimum steam pipe gradient must be 7˚, i.e. 125mm rise in 1m run.
The total length of flexible steam hoses must not exceed 5 m. For insulated rigid piping, it
must not exceed 15 m.
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 one or more steam traps (S Type) at the
lowest point(s) of the steam supply piping. The steam separator (S trap) must be installed
higher than the static pressure of the system by at least 51 mm.
Use rigid copper piping whenever possible. Flexible steam hoses can be used for short runs
(up to 5 m) or for interconnecting between rigid pipe runs. Ensure that there are no kinks and
that the hose does not sag when using flexible tubing. Do not use flexible hoses for curved
portions of the steam line.
When using rigid copper pipe, insulation must be used to diminish condensation build up.
Incorrect Installation
SKS
Illustration 9 - Steam Distribution Pipes: Incorrect Installation
Min. 7°
Correct Installation
Humidifier with 2 S.A.M.E2 manifolds
Static pressure
+ 2'’ (50mm)
SKS
Min. 7°
Correct Installation
humidifier with
Multisteam.
SKS
Static pressure
+ 2'’ (50mm)
Illustration 10 - Steam Distribution Pipes: Correct Installation

SKS4 Steam to Steam Humidifier
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Page | - 16 -
Steam Dispersion System Selection
In order to prevent the accumulation of condensation in air ducts, Neptronic has designed three basic
configurations of steam distribution systems to provide the most economical solution for any particular
application.
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 1500
mm, and/or low duct temperatures are in effect. S.A.M.E2 are used in applications with restricted duct
dimensions.
Illustration 11 - Steam Absorption Manifold (S.A.M.E2) Horizontal Duct
Steam Absorption Manifold (S.A.M.E2) Vertical Duct
The S.A.M.E2 system for vertical ducts is used when the absorption distances are normal and the
requirement is for an economical and efficient solution.
Illustration 12 - Steam Absorption Manifold (S.A.M.E2) Vertical Duct
Multi-Steam System
The Multi-Steam system is used in critical locations in air handling systems, particularly where
absorption distances are very short, less than 900 mm, or where low air duct temperatures are
present. The Multi-Steam is custom made to the dimensions of the duct or AHU.
Instructions to install the Multi-Steam system are described in a specific installation instructions
manual enclosed with the Multi-Steam system.
Illustration 13 - Multi Steam System
900
air
air

SKS4 Steam to Steam Humidifier
Installation Instructions and User Manual
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Page | - 17 -
Steam Dispersion General Recommendations
Follow these general rules based on the steam capacity of the humidifier:
The connection pipe sizes between the SKS4 humidifier and the steam distributor in the duct
must be :
o76mm for capacities up to 110kg/h
o100mm for capacities up to 200kg/h
o125mm for capacities up to 314kg/h
For all humidifiers having a capacity below 100kg/h, use standard Neptronic S.A.M.E2 steam
distribution pipes. A Multi-Steam system can be offered if shorter absorption distances are
required.
For all humidifiers having a capacity above 100kg/h, use the Multi-Steam system.
For all humidifiers having a capacity above 314kg/h, use 2 Multi-Steam units per air handling
unit (AHU) or air duct with an equal duty split to each Multi-Steam system.
S.A.M.E2 System
Positioning the S.A.M.E2
The steam manifold must be mounted and secured through the side of the air handling unit or duct.
Ensure that provisions are 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.
The dimension of the hole size in the duct must be as follows:
Steam Manifold Ø
Hole Size ØA
54 mm
76 mm
Illustration 14 - Duct Hole Dimensions and Minimum Distance
WARNING: Risk of condensation. Ensure that the minimum distance at the end of
the manifold is at least 102 mm from the top of the duct.
5'’
(120mm)
5'’
(120mm)
ØA
4'’ minimum
(102mm)

SKS4 Steam to Steam Humidifier
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Page | - 18 -
Placement of Steam Pipe in Horizontal Duct
2 Pipes
3 Pipes
Illustration 15 - Pipe Placement: Horizontal Duct
Note: Steam pipe must be supported on the end by appropriate duct hanger or strap
(supplied by others).
Placement of Steam Pipe in Vertical Duct
2 Pipes
3 Pipes
Illustration 16 - Pipe Placement: Vertical Duct
H
24'’ minimum
(600mm)
1/5 H
2/5 H
8'’
(200mm)
air
H
36'’ minimum
(900mm)
1/6 H
1/2 H 1/3 H
10'’
(250mm) 10'’
(250mm)
air
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

SKS4 Steam to Steam Humidifier
Installation Instructions and User Manual
www.neptronic.com
Page | - 19 -
Steam Pipe Work to Duct Connections with S.A.M.E2
Models SKS4-100-SLP
For these models, a single Ø76mm feed pipe must be connected to two S.A.M.E2 steam manifolds
with a suitable reduction at the lowest point to allow a Ø15mm condensate drain from the main steam
supply.
Ø3" (76mm)
ؽ"
(15mm) Steam Distribution Manifolds
(S.A.M.E2)
minimum length = 35" (900mm)
Min. 4" (100mm)
Insulated Pipe
Static Pressure
+ 2" (50mm)
Air Duct
Min. 2/5 H
H
Illustration 17 - SKS4-100-SLP Steam Pipe Connections
Models SKS4-130-SLP & SKS4-190-SLP
For these models, a single Ø76mm feed pipe must be connected to three S.A.M.E2 steam manifolds
with a suitable reduction at the lowest point to allow a Ø15mm condensate drain from the main steam
supply.
Ø3" (76mm)
ؽ"
(15mm) Steam Distribution Manifolds
(S.A.M.E2)
minimum length = 35" (900mm)
Min. 4" (100mm)
Insulated Pipe
H
Air Duct
Static Pressure
+ 2" (50mm)
Min. 1/3 H
Illustration 18 - SKS4-130-SLP & SKS4-190-SLP Steam Pipe Connections