Neptronic SKS-100-SLP Manual

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

SKS - Steam to Steam Humidifier
Installation Instructions and User Manual
1
Safety
HOT WATER
(HTHW) OR
STEAM
SUPPLY
All work concerned with 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 (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 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
Technical Specifications.................................................................................................................. 5
Technical Specifications.................................................................................................................. 6
Dimensions & Weights..................................................................................................................... 7
Installation Overview........................................................................................................................ 9
Stage 1 –Unit Positioning, Mounting and Levelling .....................................................................10
Stage 2 –Steam Distribution Pipes Positioning & Installation.....................................................11
Stage 3 –Pipework for HTHW / Raw steam....................................................................................15
Stage 4 –Water Supply Installation................................................................................................19
Stage 5 –Water Drain Connection..................................................................................................20
Stage 6 –Electrical Supply and Installation...................................................................................21
Stage 7 –Electrical Control Connections ......................................................................................22
Stage 8 –BACnet®Interface Set-up................................................................................................25
Initial Verification.............................................................................................................................26
Operation Mode ...............................................................................................................................29
Alarm Messages ..............................................................................................................................30
Programming Mode.........................................................................................................................31
User Adjustment & Diagnostic Mode .............................................................................................32
Exploded View .................................................................................................................................34
Parts List..........................................................................................................................................35
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 For
Steam Supply
On SLP & SPLP
Heat Exchanger
Steam Supply for Low Pressure Steam
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
0.55 Bar
0.69 Bar
0.83 Bar
1.03 Bar
[34.5kPa]
[55.1kPa]
[68.9kPa]
[82.7kPa]
[103.4kPa]
SKS-100-SLP
1
15
24
30
36
45
76
SKS-130-SLP
1
19
31
39
47
59
76
SKS-190-SLP
1
28
46
57
69
86
76
SKS-290-SLP
1
44
70
87
105
132
100
SKS-390-SLP
1
59
94
118
142
177
100
SKS-500-SLP
1
76
121
151
182
230
125
SKS-690-SLP
1
104
167
209
251
314
125
SKS-950-SLP
1
144
230
287
345
432
2x 100
SKS-1250-SLP
2
189
303
378
454
568
2x 125
Output Steam
Capacities For
Steam Supply
On CLP, CPLP,
CHP & CPHP
Heat Exchanger
Steam Supply for Copper Heat Exchanger
Model
Output Steam Capacity (kg/hr)
for Supply Steam Temperature & Pressure
Steam
outlet
Qty & Ø
(mm)
116˚C
121˚C
127˚C
138˚C
149˚C
160˚C
170˚C
0.69
Bar
1.03
Bar
1.37
Bar
2.41
Bar
3.44
Bar
5.17
Bar
6.89
Bar
69kPa
103kPa
137kPa
241kPa
344kPa
517kPa
689kPa
SKS-200-CHP
18
30
39
69
99
150
200
(1x) 100
SKS-333-CHP
29
50
66
116
166
249
333
(2x) 100
SKS-667-CHP
59
100
132
231
331
499
667
(2x) 125
Notes:
(*) Any in-between capacity model is 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 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 2 0 0 - CHP C
C = 230Vac 1ph
SLP
SPLP
CLP
CPLP
CHP
CPHP
Maximum capacities
Avaliable maximum capacities
in kg/h at maximum
pressure/temperature
Copper Plated High pressure
Copper Low Pressure
Copper Plated Low Pressure
Copper High pressure
Stainless Plated Low Press.
Stainless Low Pressure
Material & pressure range of
heat exchanger
Code
Note : (HP) High Pressure = 689 kPa max
(LP) Low Pressure = 103.4 kPa max

SKS - Steam to Steam Humidifier
Installation Instructions and User Manual
5
Technical Specifications
Output Steam
Capacities For
HTHW Supply
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
SKS-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
SKS-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
-
SKS-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
-

SKS - Steam to Steam Humidifier
Installation Instructions and User Manual
6
Technical Specifications
SKS200 capacity up to 172 kg/hr dependent on flow, peak temperature and pressure drop
SKS333 capacity up to 287 kg/hr dependent on flow, peak temperature and pressure drop
SKS667 capacity up to 574 kg/hr dependent on flow, peak temperature and pressure drop
Please contact Neptronic for the all technical data.
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

SKS - Steam to Steam Humidifier
Installation Instructions and User Manual
7
Dimensions & Weights
(Fig. 1)
dimensions are in cm
(Fig. 2)
dimensions are in cm
Model
Dimensions [cm]
Weight [kg]
A
B
C
D
E
F
G
2nd heat
exchanger
Empty
In
Operation
E2
F2
SKS-100-SLP
50
116.3
66.5
112
26.9
19.3
27.7
-
-
120
221
SKS-130-SLP
50
116.3
66.5
112
26.9
19.3
27.7
-
-
122
220
SKS-190-SLP
57.9
116.3
74.7
120
27.9
20.1
35.6
-
-
141
263
SKS-290-SLP
57.9
120
74.7
120
27.9
20.1
35.6
-
-
143
280
SKS-390-SLP
69.9
149.3
69.3
114.8
29.7
20.3
44.7
-
-
179
376
SKS-500-SLP
69.9
149.3
69.3
114.8
29.7
20.3
44.7
-
-
182
373
SKS-690-SLP
78.7
149.3
84.3
129.8
31
21.6
51.1
-
-
213
501
SKS-950SLP
78.7
149.3
84.3
129.8
31
21.6
51.1
-
-
215
531
SKS-1250-SLP
76.2
149.3
107.2
153.2
60.7
50.8
50.8
31.2
21.8
259
715
SKS-200-CHP
54.4
116.3
62.9
107.4
25.9
18.8
28.9
-
-
88
186
SKS-333-CHP
69.9
149.3
68.8
113.2
32
18.8
44.9
-
-
118
355
SKS-667-CHP
77
149.3
78.5
123
33.3
19.5
53.8
46.5
32.5
158
485
Notes:
- All Models noted SLP include SPLP models
- All Models noted CHP include CLP, CPLP and CPHP models
AB
C
D
30.5
10.1 15.2
E1F1
Control panel
2 steam outlets on
SKS-667-CHP
Raw steam or
HTHW inlet
Condensate or
return outlet
Main drain outlet
Water supply inlet
SKS Neptronic
6.6
G
19
34.5
E2F22nd heat exchanger
connection only on
SKS-667-CHP

SKS - Steam to Steam Humidifier
Installation Instructions and User Manual
8
Handling & Unpacking
Lifting or handling MUST only be carried out by trained and qualified personnel. Ensure
that the lifting operation has been properly planned, risk assessed and that all equipment
has been checked by a skilled and competent Health & Safety representative and
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. 3)
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 per steam outlet to connect on the steam output of
the humidifier.
One 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
9
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 Levelling 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. 4)
!
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
10
Stage 1 – Unit Positioning, Mounting and Levelling
Positioning the
Humidifier
SKS humidifier must be installed to ensure the steam hose length is kept to the
shortest possible length.
Maximum steam hose length between the humidifier and the steam distribution
pipes is 5m.
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 6.
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-200-CHP Models can be ceiling hung by using
the appropriate Lifting and hanging bracket.
SKS humidifier must be levelled, in order to ensure proper slop for condensate
return by heat exchanger.
Ambient condition
The humidifier location must have an ambient temperature of less than 30˚C.
Minimum
Clearances
(Fig. 5)
SKS-200-CHP
Other Models
(Fig. 6)
Note: Above minimum clearances are indicated for inspection and servicing access.
SKS Humidifier is designed for a 0 clearance to combustible material.
70 cm
side to side
78.9 cm
center to center
110 cm
SKSNeptronic
19 cm
69.5 cm
Rod and Nuts
9.6 cm min
Lifting and
Hanging
Bracket
0.60m
minimum
0.60m
minimum
0.75m
minimum
0.60m
minimum
1m
minimum

SKS - Steam to Steam Humidifier
Installation Instructions and User Manual
11
Stage 2 – Steam Distribution Pipes Positioning & Installation
Fundamental
Design
Concepts
1. Maximum steam velocity in a pipe must not exceed 12m/s velocity.
2. Minimum steam pipe gradient must be 7˚i.e. 125mm rise in 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 50mm.
4. Total length of the steam hose or rigid pipe must not exceed 5 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. 7)
(Fig. 8)
6. Connection pipe sizes between SKS and steam distributor in the duct must be :
108mm up to 240kg/h
133mm up to 255kg/h
7. All SKS/CHP Humidifiers must use Multi-Steam.
8. All Humidifiers above 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
Multisteam.
Static pressure
+ 50mm
SKS
Incorrect Installation
SKS

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 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. 9)
Vertical duct (Fig. 10)
Ø15mm Static pressure
+ 50mm
Min. 50 mm
Min. 50 mm
Min. 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
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
+ 50mm

SKS - Steam to Steam Humidifier
Installation Instructions and User Manual
13
Stage 2 –Steam Distribution Pipes Positioning & Installation
Steam Pipe Work to Duct Connections
SKS-200-CHP
(Fig. 11)
A single Ø76mm or Ø100mm or Ø125mm feed pipe must be connected to a single
Multi-Steam with a suitable reduction at the lowest point to allow a Ø15mm
condensate drain from the main steam supply.
SKS-333-CHP
(Fig. 12)
Two Ø100mm or Ø125mm steam outlets must be connected to two Multi-Steam with
a suitable reduction at the lowest point to allow a Ø15mm condensate drain from the
main steam supply.
If the two Ø15mm condensate pipes are connected, the common condensate drain
must be Ø20mm.
Ø108mm
Insulated pipe Air duct
Static pressure
+ 50mm Multisteam
Min. 7° pipe slop
Ø15mm
Total length of steam conduit should
not exceed 5m
Ø22mm
Ø108mm (x2)
Ø133mm
Min. 7° pipe slope
Insulated pipe
Air Duct
Ø15mm Static pressure
+ 50mm
min7°pipeslope
Total length of steam conduit
should not exceed 5m

SKS - Steam to Steam Humidifier
Installation Instructions and User Manual
14
Stage 2 –Steam Distribution Pipes Positioning & Installation
SKS-667-CHP
(Fig. 13)
Two Ø125mm steam outlets to feed pipe must be connected to two Multi-Steam with
a suitable reduction at the lowest point to allow a Ø15mm condensate drain from the
main steam supply.
If the two Ø15mm condensate pipes are connected, the common condensate drain
must be Ø20mm.
Ø15mm
Static pressure
+ 50mm
Ø22mm
Min. 7° pipe slope
Insulated pipe
Air Duct
Ø133mm (x2)
Total length of steam conduit
should not exceed 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 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 piping must be checked for leak.
All leaks MUST be sealed prior to commissioning the Humidifier.
Union Dimensions &
Installation
Model
HTHW / Raw steam
inlet
Return
outlet
SKS-100/130-SLP
Ø20mm
Ø20mm
SKS-190/290-SLP
Ø25mm
Ø20mm
SKS-390-SLP
Ø32mm
Ø20mm
SKS-500/690-SLP
Ø32mm
Ø32mm
SKS-950-SLP
Ø40mm
Ø40mm
SKS-1250-SLP
Ø32mm (x2)
Ø32mm (x2)
SKS-200-CHP
Ø20mm
Ø20mm
SKS-333-CHP
Ø32mm
Ø32mm
SKS-667-CHP
Ø32mm (x2)
Ø32mm (x2)
SKS-1250-SLP and SKS-667-CHP is equipped with two (2) heat
exchangers and therefore has 2 HTHW / raw steam inlets and two (2)
condensate return outlets.
Typical HTHW Installation
HTHW Supply Size
The size of the HTHW supply pipe and the control valve must be calculated
considering 0.8kW of HTHW for each kg of clean steam produced and
distributed into the AHU.
(Fig. 14)
!
Isolating valve
Isolating valve
3 way Actuated Control
valve (diverting)
SKS
Thermometer
Return line
Supplied by others
RETURN
Thermometer Regulating valve
HTHW

SKS - Steam to Steam Humidifier
Installation Instructions and User Manual
16
Stage 3 –Pipework for HTHW / Raw steam
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.
Typical Raw Steam Installation
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.
Only float and thermostatic type steam trap must be used to eliminate
condensate from the heat exchanger. This steam trap needs be able to
withstand at least twice the humidifier duty.
Do not use thermostatic or Thermodynamic traps to eliminate condensate
from the heat exchanger. Those traps can be used as small capacity traps
to eliminate condensate from raw steam line only.
After installation, field piping and Humidifier Steam piping must be checked
for leak.
All leaks MUST be sealed prior to commissioning the Humidifier.
Steam Supply Size
Size of the steam supply pipe and control valve must be calculated
considering 1.35kg of raw steam for each kg of clean steam produced
and distributed into AHU.
!

SKS - Steam to Steam Humidifier
Installation Instructions and User Manual
17
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. 15)
Raw Steam Supply
& Condensate Installation
Connect the raw steam inlet to an adequate steam supply with steam
control valve, strainer, isolating valve and small capacity trap.
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 a steam trap. Do not ‘’group trap’’.
Float and thermostatic type steam traps are recommended and must be
fitted no less than 30cm below the condensate outlets, with condensate
pocket fitted before the trap.

SKS - Steam to Steam Humidifier
Installation Instructions and User Manual
18
Stage 3 –Pipework for HTHW / Raw steam
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. 16)
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
19
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: 70 to 480kPa
Minimum water temperature: +4˚C
Maximum water temperature:+40˚C
Model
Water Inlet
Connection Size
SKS-XXXX
Ø10mm compression fitting (supplied)
Water Supply
Line Installation
To facilitate servicing, a shut off valve (not supplied) must be installed in the water
line, within 1m of the humidifier.
(Fig. 17)
!
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)