Neptronic SKS-100-SLP Manual

Steam to Steam Humidifier
SKS Series
4011008
Installation Instructions and User Manual
READ AND SAVE THESE INSTRUCTIONS
SKS-IOM-180320

SKS - Steam to Steam Humidifier
Installation Instructions and User Manual
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 (e.g. electrician or 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 aspects of the design of their humidification systems to
reduce as far 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 (68 to 113˚F
[20-45˚C]).
Avoid water stagnation.
Clean and disinfect the humidification system.
Carry out a risk assessment of the water system supplying the humidifier by
a competent person, to ensure the water supply is of an acceptable quality
CORRECT USE
Neptronic® systems and products are designed only for use of humidification.
Any other application is not considered use for the intended purpose. The
manufacturer cannot be made liable for any damage resulting from incorrect use.
ACCESS
NEVER LEAVE SKS CABINET WITH DOOR TO ELECTRICAL PANEL OPEN AS
LIVE ELECTRICAL PARTS MAY BE GAINED.
WATER
Neptronic® systems are designed to be used with mains, reverse osmosis, de
mineralized or partially softened water. On no account 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 max pressure of 70 psig (480 kPa) or pressure
limits laid out in the specification and installation must comply with local regulations.
WARRANTY
This product is subject to the terms and conditions described at
http://www.neptronic.com/Sales-Conditions.aspx.
!

SKS - Steam to Steam Humidifier
Installation Instructions and User Manual
2
Foreword
Foreword
This installation and operation manual has been developed to facilitate the
installation and the operation of the SKS series humidifier. The strict application of
these instructions will ensure the conformity of the installation and operation to the
manufacturer's recommendations.
The application of these instructions is one of the conditions of the warranty.
The application of these instructions does not ensure at any time conformity with the
rules in force of the country of destination.
This product has been declared conform to applicable Canadian, American and
European standards.
Copyright© 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.
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.

SKS - Steam to Steam Humidifier
Installation Instructions and User Manual
3
Table of Contents
Safety..................................................................................................................................................1
Foreword............................................................................................................................................2
Table of Contents ..............................................................................................................................3
Technical Specifications...................................................................................................................4
Dimensions & Weights......................................................................................................................5
Installation Overview.........................................................................................................................7
Stage 1 –Unit Positioning and Mounting.........................................................................................8
Stage 2 –Steam Distribution Pipes Positioning & Installation.......................................................9
Stage 3 –Pipework for HTHW / Raw Steam...................................................................................15
Stage 4 –Water Supply Installation................................................................................................18
Stage 5 –Water Drain Connection..................................................................................................19
Stage 6 –Electrical Supply and Installation...................................................................................20
Stage 7 –Electrical Control Connections ......................................................................................21
Stage 8 –BACnet®Interface Set-up................................................................................................24
Initial Verification.............................................................................................................................25
Operation Mode ...............................................................................................................................28
Alarm Messages ..............................................................................................................................29
Programming Mode.........................................................................................................................30
User Adjustment & Diagnostic Mode .............................................................................................31
Other related documents:
1. Start-up check list
2. Wiring diagram
3. If humidifier is equipped with BACnet®option:
BACnet®communication module user guide.

SKS - Steam to Steam Humidifier
Installation Instructions and User Manual
4
Technical Specifications
SKS
Nomenclature
Output Steam
Capacities
Stainless Steel
Heat Exchanger
Model*
Nb of
Heat
Exc.
Output steam capacity (lb/h) [kg/h]
for Supply steam pressure (2)
Steam
outlet
Qty & Ø
(in) [mm]
5 PSI
[34.5kPa]
8 PSI
[55.1kPa]
10 PSI
[68.9kPa]
12 PSI
[82.7kPa]
15PSI
[103.4kPa]
SKS-100-SLP
1
33
[15]
53
[24]
67
[30]
80
[36]
100
[45]
(1x) 3’’
[76]
SKS-130-SLP
1
43
[19]
69
[31]
87
[39]
104
[47]
130
[59]
(1x) 3’’
[76]
SKS-190-SLP
1
63
[28]
101
[46]
127
[57]
152
[69]
190
[86]
(1x) 3’’
[76]
SKS-290-SLP
1
97
[44]
155
[70]
193
[87]
232
[105]
290
[132]
(1x) 4’’
[100]
SKS-390-SLP
1
130
[59]
208
[94]
260
[118]
312
[142]
390
[177]
(1x) 4’’
[100]
SKS-500-SLP
1
167
[76]
267
[121]
333
[151]
400
[182]
500
[230]
(1x) 5’’
[125]
SKS-690-SLP
1
230
[104]
368
[167]
460
[209]
552
[251]
690
[314]
(1x) 5’’
[125]
SKS-950-SLP
1
317
[144]
507
[230]
633
[287]
760
[345]
950
[432]
(2x) 4’’
[100]
SKS-1250-SLP
2
417
[189]
667
[303]
833
[378]
1000
[454]
1250
[568]
(2x) 5’’
[125]
Copper
Heat Exchanger
Model*
Nb of
Heat
Exc.
Output steam capacity (lb/h) [kg/h]
for Supply steam pressure (2)
Steam
outlet
Qty & Ø
(in) [mm]
5 PSI
[34.5kPa]
8 PSI
[55.1kPa]
10 PSI
[68.9kPa]
12 PSI
[82.7kPa]
15PSI
[103.4kPa]
SKS-65-CLP
1
22
[10]
35
[16]
44
[20]
53
[24]
65
[29]
(1x) 3’’
[76]
SKS-110-CLP
1
37
[17]
59
[27]
73
[33]
88
[40]
110
[50]
(1x) 3’’
[76]
SKS-220-CLP
2
73
[33]
117
[53]
147
[67]
176
[80]
220
[100]
(1x) 4’’
[100]
Notes:
(*) Any in-between capacity model is available upon request to factory.
1 - Power supply can be 120Vac 1.5A, 208Vac 0.75A or240/ 250Vac 0.75A, 50Hz or 60Hz,.
2 - Raw steam pressure at actual point of connection to humidifier.
3 - Maximum static duct pressure is 5’’ w.c [1.250 kPa]. For higher static duct pressures please
consult Neptronic or its authorized distributor.
Model Heat
Exchanger
type
Voltage
code
SKS - 0 0 0 0 - SLP A
A=120
B=208
C=240
SLP
SCLP
SPLP
CLP
CCLP
CPLP
CHP
CCHP
CPHP
Maximum capacities
Avaliable maximum capacities
in lb/h or kg/h at maximum
pressure/temperature
Copper Plated High pressure
Copper Low Pressure
Copper Coated Low Pressure
Copper Plated Low Pressure
Copper High pressure
Stainless Coated Low Press.
Stainless Plated Low Press.
Copper Coated High pressure
Avaliable voltages
(Vac)
Stainless Low Pressure
Material & pressure range of
heat exchanger
Code

SKS - Steam to Steam Humidifier
Installation Instructions and User Manual
5
Dimensions & Weights
(Fig. 1)
dimensions in bracket are in cm
Model
Dimensions (in) [cm]
Weight (lb) [kg]
A
B
C
D
E
F
G
2nd heat
exchanger
Empty
In
Operation
E2
F2
SKS-100-SLP
19.7
[50.0]
45.8
[116.3]
26.2
[66.5]
44.1
[112.0]
10.6
[26.9]
7.6
[19.3]
10.9
[27.7]
-
-
265
[120]
487
[221]
SKS-130-SLP
19.7
[50.0]
45.8
[116.3]
26.2
[66.5]
44.1
[112.0]
10.6
[26.9]
7.6
[19.3]
10.9
[27.7]
-
-
270
[122]
484
[220]
SKS-190-SLP
22.8
[57.9]
45.8
[116.3]
29.4
[74.7]
47.3
[120.1]
11.0
[27.9]
7.9
[20.1]
14.0
[35.6]
-
-
310
[141]
578
[263]
SKS-290-SLP
22.8
[57.9]
47.2
[120.0]
29.4
[74.7]
47.3
[120.1]
11.0
[27.9]
7.9
[20.1]
14.0
[35.6]
-
-
315
[143]
616
[280]
SKS-390-SLP
27.5
[69.9]
58.8
[149.3]
27.3
[69.3]
45.2
[114.8]
11.7
[29.7]
8.0
[20.3]
17.6
[44.7]
-
-
395
[179]
828
[376]
SKS-500-SLP
27.5
[69.9]
58.8
[149.3]
27.3
[69.3]
45.2
[114.8]
11.7
[29.7]
8.0
[20.3]
17.6
[44.7]
-
-
400
[182]
822
[373]
SKS-690-SLP
31.0
[78.7]
58.8
[149.3]
33.2
[84.3]
51.1
[129.8]
12.2
[31.0]
8.5
[21.6]
20.1
[51.1]
-
-
470
[213]
1102
[501]
SKS-950-SLP
31.0
[78.7]
58.8
[149.3]
33.2
[84.3]
51.1
[129.8]
12.2
[31.0]
8.5
[21.6]
20.1
[51.1]
-
-
475
[215]
1168
[531]
SKS-1250-SLP
30.0
[76.2]
58.8
[149.3]
42.3
107.2]
60.3
[153.2]
23.9
[60.7]
20.0
[50.8]
20.0
[50.8]
12.3
[31.2]
8.6
[21.8]
570
[259]
1574
[715]
Model
Dimensions (in) [cm]
Weight (lb) [kg]
A
B
C
D
E
F
G
2nd heat
exchanger
Empty
In
Operation
E2
F2
SKS-65-CLP
22.8
[57.9]
45.8
[116.3]
29.4
[74.7]
47.3
[120.1]
11.0
[27.9]
8.6
[21.8]
13.0
[33.0]
-
-
310
[141]
578
[263]
SKS-110-CLP
27.5
[69.9]
58.8
[149.3]
27.3
[69.3]
45.2
[114.8]
11.7
[29.7]
7.5
[19.0]
13.0
[33.0]
-
-
395
[179]
828
[376]
SKS-220-CLP
31.0
[78.7]
58.8
[149.3]
33.2
[84.3]
51.1
[129.8]
13.2
[33.5]
7.6
[19.3]
23.7
[60.2]
13.0
[33.0]
18.5
[45.7]
470
[213]
1102
[501]
AB
C
D
[30.5]
SKS Neptronic
4'’
[10.1] 6'’ [15.2]
EF
2.6'’
[6.6] G
Control panel
2nd steam outlet on
SKS-950 &1250
Raw steam inlet
Condensate or
return outlet
Main drain outlet
Water supply inlet
12'’

SKS - Steam to Steam Humidifier
Installation Instructions and User Manual
6
Handling & Unpacking
Lifting or handling MUST 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 effective
control measures put in place.
It is the customer’s responsibility to ensure that operators are trained in handling heavy
goods and to enforce the relevant lifting regulations.
Refer to Dimensions & Weight section for system dry weights.
Handling and
Lifting
The SKS Humidifier MUST always be handled and lifted with care and must remain
within its original packaging for as long as possible prior to installation
The SKS Humidifier package may be carried using a fork lift from the underside. Caution
must be exercised to ensure balanced load before lifting.
Lifting of SKS Humidifier MUST always be carried out using the appropriate Neptronic
Lifting bracket.
Lifting sling angle must be greater than 30˚to the horizontal.
(Fig. 2)
Unpacking
SKS Humidifier is shipped on a wooden crate.
Ensure packing wooden crate and skid is removed prior to commissioning.
List of
Accessories
Supplied
Two adjustable steam hose collars to connect on the steam output of the humidifier.
One Ø3/8’’ (10mm) compression fitting for water supply inlet.
One strainer (option).
One actuated control valve (option).
One Float and thermostatic steam trap for the condensate return (option).
!
Slide lifting
strap here

SKS - Steam to Steam Humidifier
Installation Instructions and User Manual
7
Installation Overview
All installation work must comply with local regulations.
All work concerned with the installation of the SKS 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 SKS Humidifier and its associated components, no
special tooling is required above that of a fitter’s toolkit.
Installation Method
Statement
Stage 1: Unit Positioning and Mounting
Stage 2: Steam Distribution Pipes Positioning & Installation
Stage 3: Raw Steam Supply Connection
Stage 4: Water Supply Installation
Stage 5: Water Drain Connection
Stage 6: Electrical Supply Installation
Stage 7: Electrical Control Connections
Stage 8: BACnet® Interface Set-up (optional)
(Fig. 3)
!
Clean steam outlet(s)
Raw steam Inlet(s)
Condensate or return
outlet(s)
Power supply
Electrical controls
Drain outlet
Water supply inlet
Control panel
Legs (optional)

SKS - Steam to Steam Humidifier
Installation Instructions and User Manual
8
Stage 1 – Unit Positioning and Mounting
Positioning the
Humidifier
SKS humidifier must be installed to ensure the steam hose length is kept to the
shortest possible length.
For flexible steam hose: the total steam line length must not exceed 16 feet (5
meters). For longer distances use insulated hard piping.
For insulated hard piping: the total steam line length must not exceed 50 feet (15
m). For longer steam line runs, consult factory.
SKS humidifier must be installed with provision for the Steam supply piping
connections and Steam condensate trap installation.
The humidifier must be located in an area that is fully accessible for inspection and
servicing. Observe the minimum access distances as shown in figure 5.
SKS 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. Ensure that the floor beneath the humidifier is water proof to
withstand any water spillage during servicing or if a problem occurs. Ensure that
the humidifier is properly attached through its legs using anchors to the floor.
SKS-100 & 130-SLP and SKS 065 & 110-CLP Models can be ceiling hung by
using the appropriate Lifting and hanging bracket.
SKS humidifier must be levelled, in order to ensure proper return of condensate
through heat exchanger.
Ambient Condition
The humidifier location must have an ambient temperature of less than 86˚F [30˚C].
Minimum
Clearances
(Fig. 4)
SKS-100 & 130
SLP
SKS 065 & 110-
CLP
Other Models
(Fig. 5)
Minimum clearances
are:
Top, 30’’ [75 cm]
minimum
Both sides, 24’’
[60cm] minimum
Front, 39’’ [100
cm] minimum
Note: Above minimum clearances are indicated for inspection and servicing access.
SKS Humidifier is designed for a 0 clearance to combustible material.
27.6" (70 cm)
side to side
31.1" (78.9 cm)
center to center
43.487" (110 cm)
SKSNeptronic
7.6" (19 cm)
27.4" (69.5 cm)
Rod and Nuts
3/8'’ (M10)
minimum
Lifting and
Hanging
Bracket
24'’(0.6m)
minimum
24'’(0.6m)
minimum
30'’ (0.75m)
minimum
24'’(0.6m)
minimum
39'’(1m)
minimum

SKS - Steam to Steam Humidifier
Installation Instructions and User Manual
9
Stage 2 – Steam Distribution Pipes Positioning & Installation
Fundamental
Design
Concepts
1. Maximum steam velocity in a pipe must not exceed 39 feet/hr [12m/s] velocity.
2. Minimum steam pipe gradient must be 7˚i.e. 5’’ [125mm] rise in 40’’ [1m] run.
3. The lowest point of any steam hose or rigid pipe must be the humidifier. A steam
separator (S trap) must be installed higher than the static pressure of the system by
at least 2’’ [50mm].
4. Total length of the flexible steam hose must not exceed 16 feet (5 m) or insulated
rigid piping must not exceed 50 feet (15 m).
5. Whenever possible use rigid copper piping, flexible steam hose can be used for
short runs or for interconnecting between rigid pipe runs, ensure that there is no
kink in the flexible hose.
When using rigid copper pipe, insulation must be used to diminish condensation
build up.
(Fig. 6a)
(Fig. 6b)
(Fig. 7)
6. Connection pipe sizes between SKS and steam distributor in the duct must be :
3’’ (76mm) up to 264lb/h [120kg/h]
4 ¼’’ (108mm) up to 528lb/h [240kg/h]
5 ¼’’ (133mm) up to 560lb/h [255kg/h]
7. All Humidifier below 220lb/h [100kg/h] capacity must use standard Neptronic®
S.A.M.E2 Steam distribution pipes, Multi-Steam can be offered if shorter absorption
distances are required.
8. All Humidifiers above 220lb/h [100kg/h] capacity must use Multi-Steam.
9. All Humidifiers above 528lb/h [240kg/h] must use 2 Multi-Steam units per Air
Handling Unit (AHU) or air Duct with an equal duty split to each Multi-Steam
!
Min. 7°
Correct Installation
Humidifier with 2 SAMB E2 manifolds
Static pressure
+ 2'’ (50mm)
SKS
Min. 7°
Correct Installation
humidifier with
Multisteam.
SKS
Static pressure
+ 2'’ (50mm)
Incorrect Installation
SKS

SKS - Steam to Steam Humidifier
Installation Instructions and User Manual
10
Stage 2 –Steam Distribution Pipes Positioning & Installation
Selection of
Steam
Distribution
Manifolds
1. The minimum steam manifold length that can be used with the SKS series
humidifier is 35’’ [900mm]. Any manifold below this dimension will have insufficient
outlet spigots to allow proper steam distribution.
2. If duct size is below 35’’ [900mm] width it will be necessary to either fit multiple
pipes or Multi-Steam.
Horizontal duct –2 manifolds (Fig. 8)
Horizontal duct –3 manifolds (Fig. 9)
detail of manifold mounting bracket (Fig. 10)
Steam manifold must be mounted and secured through the side of
the air handling unit or duct. Provision must be made for safe
accessibility, ideally with an observation light and window.
Check 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 per table below:
Steam manifold Ø
Hole size ØA
2 ⅛’’ (54mm)
3’’ (76mm)
WARNING: Risk of condensing. Ensure that
the minimum distance of the end of the
manifold is at least 4’’ (102mm) from the top
of the duct.
Minimum distance (Fig. 11)
Vertical duct –2 manifolds (Fig. 12)
Vertical duct –3 manifolds (Fig. 13)
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
5'’
(120mm)
5'’
(120mm)
ØA
!
4'’ minimum
(102mm)
H
min. 24'’ [600mm]
1/2 H 1/4 H1/4 H
Air duct
Min. 4'’[100mm]
H
min. 36'’ [900mm]
1/3 H 1/3 H
1/6 H 1/6 H
Air duct
Min. 4'’
[100mm]

SKS - Steam to Steam Humidifier
Installation Instructions and User Manual
11
Stage 2 –Steam Distribution Pipes Positioning & Installation
Steam Pipe Work to Duct Connections with S.A.M.E2
SKS-100-SLP
SKS-65-CLP
SKS-110-CLP
(Fig. 14)
Single Ø3’’ (76mm) feed pipe must be connected to two (2) S.A.M.E2 Steam
manifolds with a suitable reduction at the lowest point to allow a ؽ’’ (15mm)
condensate drain from the main steam supply.
SKS-130-SLP
SKS-190-SLP
SKS-220-CLP
(Fig. 15)
Single Ø3’’ (76mm) feed pipe must be connected to 3 S.A.M.E2 Steam manifolds with
a suitable reduction at the lowest point to allow a ؽ’’ (15mm) condensate drain from
the main steam supply.
Ø3'’ (76mm)
ؽ"
(15mm) Steam distribution manifolds
(SAMB E2)
minimum lenght = 35'’ (900mm)
Min. 4'’ (100mm)
Insulated pipe
Static pressure
+ 2'’ (50mm)
Air Duct
Min. 2/5 H
H
Ø3'’ (76mm)
ؽ"
(15mm) Steam distribution manifolds
(SAMB E2)
minimum lenght = 35'’ (900mm)
Min. 4'’ (100mm)
Insulated pipe
H
Air Duct
Static pressure
+ 2'’ (50mm)
Min. 1/3 H

SKS - Steam to Steam Humidifier
Installation Instructions and User Manual
12
Stage 2 –Steam Distribution Pipes Positioning & Installation
Selection of
Multi-Steam
1. For all Multi-Steam units use the Neptronic® Humidisoft program to size the
unit.
2. Where two Multi-Steam units are required, duties in excess of 528lb/h [240kg/h]
make your selection using the following rules:
Divide the air volume flow in half.
Divide the AHU / air duct width in half.
Height of the duct must remain at 100% its height.
This will size Multi-Steam units so that they can be placed side by side.
3. For installation of Multi-Steam units please refer to Neptronic® Multi-Steam
Installation Instructions
Horizontal duct (Fig. 16)
ؽ'’
(15mm) Static pressure
+ 2'’ (50mm)
Min. 2'’ (50 mm)
Min. 2'’
(50 mm)
Mounting bracket must be level horizontally
Steam supply hose or
rigid pipe to Humidifier
Header must be pitched toward condensate drain
Condensate drain pipe to steam trap
Air duct
Rod, bolt, nut and
washer assembly
Min. 2'’
(50 mm)

SKS - Steam to Steam Humidifier
Installation Instructions and User Manual
13
Stage 2 –Steam Distribution Pipes Positioning & Installation
Vertical duct (Fig. 17)
Steam pipe work to Duct connections
SKS-100-SLP
to
SKS-690-SLP
SKS-65-CLP
to
SKS-220-CLP
Ø4'’ (100mm) or
ؽ'’
(15mm)
Insulated pipe Air duct
Static pressure
+ 2'’ (50mm)
Multisteam
Min. 7° pipe slop
Total length of steam conduit must
not exceed 16 feet (5m).
Ø3'’ (76mm) or
Ø5'’ (125mm)
(Fig. 18)
A single Ø3’’ [76mm] or Ø4’’ [100mm] or Ø5’’ [125mm] feed pipe must be connected
to a single Multi-Steam with a suitable reduction at the lowest point to allow a Ø1/2’’
[15mm] condensate drain from the main steam supply.
Air flow
Steam supply hose or
rigid insulated pipe
to Humidifier (by others)
Air duct
Rod, bolt, nut and washer
assembly (by others)
Condensate drain pipe
(by others)
Neptronic
Humidifier
Air flow
10% slope is integrated
in header design
Static pressure
+ 2'’ (50mm)

SKS - Steam to Steam Humidifier
Installation Instructions and User Manual
14
Stage 2 –Steam Distribution Pipes Positioning & Installation
SKS-950-SLP
SKS-1250-SLP
(Fig. 19)
Two Ø4’’ [100mm] or Ø5’’ [125mm] steam outlets must be connected to two Multi-
Steam with a suitable reduction at the lowest point to allow a Ø1/2’’ [15mm]
condensate drain from the main steam supply.
If the two Ø1/2’’ [15mm] condensate pipes are connected, the common condensate
drain must be Ø3/4’’ [20mm].
ؽ'’ (15mm)
Static pressure
+ 2'’ (50mm)
ؾ'’ (22mm)
Min. 7° pipe slope
Insulated pipe
Air Duct
Ø4'’ (100mm) (x2) or
Ø5'’ (130mm) (x2)
Total length of steam conduit
should not exceed 16 feet (5m)

SKS - Steam to Steam Humidifier
Installation Instructions and User Manual
15
Stage 3 – Pipework for HTHW / Raw Steam
HTHW / Raw steam supply piping must conform to local codes and regulations.
Risk of Distortion and Failure. HTHW / Raw steam piping installation must be supported so
that no strain are imposed on the Humidifier steam inlet flange and control valve.
Pipes must be inspected for dirt and chips after threading and reaming the end of pipes.
After installation, field piping and Humidifier Steam piping must be checked for leak.
All leaks MUST be sealed prior to commissioning the Humidifier.
Union
Dimensions &
Installation
Model
HTHW / Raw steam
inlet
Condensate return
outlet
SKS-100/130-SLP
SKS-065/110-CLP
ؾ’’ [20mm]
ؾ’’ [20mm]
SKS-220-CLP
ؾ’’ [20mm] (2x)
ؾ’’ [20mm] (2x)
SKS-190/290-SLP
Ø1’’ [25mm]
ؾ’’ [20mm]
SKS-390-SLP
Ø1-1/4’’ [32mm]
ؾ’’ [20mm]
SKS-500/690-SLP
Ø1-1/4’’ [32mm]
Ø1-1/4’’ [32mm]
SKS-950-SLP
Ø1-1/2’’ [40mm]
Ø1-1/2’’ [40mm]
SKS-1250-SLP
Ø1-1/4’’ [32mm] (x2)
Ø1-1/4’’ [32mm] (x2)
SKS-1250-SLP and SKS-220-CLP are equipped with two (2) heat exchangers and
therefore has 2 raw steam inlets and two (2) condensate return outlets.
Typical Raw Steam Installation
HTHW / Raw steam supply piping must conform to local codes and regulations.
Risk of Distortion and Failure. Steam piping installation must be supported so that no strain
are imposed on the Humidifier steam inlet flange and control valve.
Pipes must be inspected for dirt and chips after threading and reaming the end of pipes.
A strainer as well as an isolating valve must be installed upstream to the control valve on the
raw steam supply pipe.
Two vacuum breakers (not supplied) must be installed at the highest practical points.
Installation must be done only in the vertical upright position.
Brass coupling must be used between the heat exchanger stainless steel pipes and steam
inlet / condensate outlet piping.
The condensate must be evacuated efficiently. Therefore, a condensate pocket and stream
trap must be installed to ensure proper condensate elimination.
Do not use thermostatic or Thermodynamic traps for condensate from heat exchanger.
Steam Supply
Size
Size of the steam supply pipe and control valve must be calculated considering 3lb
[1.35kg] of raw steam for each lb (kg) of clean steam produced and distributed
into AHU.
!
!

SKS - Steam to Steam Humidifier
Installation Instructions and User Manual
16
Stage 3 – Pipework for HTHW / Raw Steam
STEAM
SKS
12" [30cm]
minimum
Vacuum breaker
(supplied by others)
Pressure gage
(supplied by others)
Vacuum breaker
(supplied by others)
Steam Trap (supplied by others)
Small capacity to eliminate possible
condensate from raw steam line
Cap (supplied by others)
Cap (supplied by others)
Condensate pocket
(supplied by others)
Diameter should be ½'’ [25mm] higher
than condensate pipe
Float & thermostatic
steam trap (supplied)
Actuated control valve
(supplied)
Shut off valve
(supplied by others)
Strainer (supplied)
CONDENSATE
RETURN
Piping (by others)
(Fig. 20)
Raw Steam
Supply
& Condensate
Installation
Connect the raw steam inlet to an adequate steam supply with actuated control
valve, strainer and isolating valve.
One control valve is required for each raw steam inlet.
Control valve must be fitted with a mechanism and be electrically wired so that the
valve returns to the closed position when no air flow is detected in the AHU.
In case of two (2) condensate outlets, each individual condensate outlet requires an
individual steam trap. Do not ‘’group trap’’.
Float and thermostatic type steam traps are recommended for the condensate from
the heat exchanger and must be fitted no less than 12’’ (30cm) below the
condensate outlets, with condensate pocket fitted before the trap.
Thermostatic type steam traps are recommended as the small capacity trap to
eliminate condensate from the raw steam line.

SKS - Steam to Steam Humidifier
Installation Instructions and User Manual
17
Stage 3 – Pipework for HTHW / Raw Steam
Typical HTHW Installation
HTHW Supply Size
The size of the HTHW supply pipe and the control valve must be calculated
considering 1.07HP (0.8kW) of HTHW for each lb (kg) of clean steam
produced and distributed into the AHU.
(Fig. 21)
HTHW Supply
& Condensate
Installation
Connect the HTHW inlet(s) to an adequate HTHW supply with 3 way diverting
control valve, isolating valves, regulating valve and thermometers.
Only one (1) control valve is required irrespective of the number of HTHW
inlets.
The control valve must be fitted with a mechanism and be electrically wired so
that the valve returns to the closed position when no air flow is detected in the
AHU.
The return outlet(s) must be connected to the HTHW with an isolating valve.
Thermometers must be installed on the HTHW supply line and the return line
close to the humidifier.
Positioning the Control Valve
Install the actuated valve between 20 to 30 degrees from vertical in order to
reduce the convection heat to the actuator.
(Fig. 22)
Isolating valve
Isolating valve
3 way Actuated Control
valve (diverting)
SKS
Thermometer
Return line
Supplied by others
RETURN
Thermometer Regulating valve
HTHW
A
A
B
A
A
B
STEAM SUPPLY SIDE
FLOW DIRECTION
VALVE BODY
ELECTRIC
ACTUATOR
20-30º

SKS - Steam to Steam Humidifier
Installation Instructions and User Manual
18
Stage 4 – Water Supply Installation
Water supply installation must conform to local codes and regulations.
Any installation work must be carried out by suitably qualified personnel.
Water Inlet
Specifications
Neptronic® SKS Humidifier is designed to be used with potable, reverse osmosis,
deionised and de-mineralized water.
Maximum water supply pressure: 10 to 70 psig [70 to 480kPa]
Minimum water temperature: 49˚F [+4˚C]
Maximum water temperature: 104˚F [+40˚C]
Model
Water inlet
Connection size
SKS-XXXX
Ø3/8’’ (10mm) compression fitting (supplied)
Water Supply
Line Installation
To facilitate servicing, a shut off valve (not supplied) must be installed in the water
line, within 40’’ [1m] of the humidifier.
(Fig. 23)
!
Fill valve
(in the humidifier)
Humidifier base
Male threaded
valve connection
Swivel top
Compression
fitting
Water line 3/8'’ (10mm) pipe
(by others)
Shut off valve
(by others)

SKS - Steam to Steam Humidifier
Installation Instructions and User Manual
19
Stage 5 – Water Drain Connection
Water Drain installation must conform to local codes and regulations.
Any installation work must be carried out by suitably qualified personnel.
Water Drain
Specification
Water Drain temperature: +140˚F [+60˚C]
Model
Water Drain Outlet
Connection size
SKS-XXXX
Ø3/4’’ [20mm]
Water Drain
Installation
Water drain outlet connection must be connected to drain pipe of sufficient size.
It is recommended to use Ø3/4’’ [20mm] minimum standard copper hydraulic pipes.
Water main drain and drip pan must be kept separate to the open drain. Do not
connect the main drain and the drip pan before the open drain.
Minimum water drain pipe gradient must be ¼” (6.5mm) per foot (300mm) horizontal
run.
No drain trap is required on the main drain.
(Fig. 24)
!
SKS
Ø ¾'’ (19mm)
Building water drain
Ø 1'’ (26mm)
minimum
Drip Pan