Neptronic SKE05 Manual

SKE-BACNET-ENG-170816
Steam Humidifier
SKE series
BACNET
Installation instruction
& user manual
READ AND SAVE THESE INSTRUCTIONS
HUMIDITY
45% RH

i
Foreword
Neptronic Company Overview
Founded in 1976, we’re a private corporation that designs, manufactures and distributes products for the HVAC
industry. Our product line includes intelligent controllers, electronic actuators, actuated valves, humidifiers and
electric heaters.
Our products are designed and manufactured by over 250 dedicated employees in our 7,500 m2(80,000 ft2)
state-of-the-art facility located in Montreal, Canada. Using a vertical integration model, our entire manufacturing
chain is under one roof from software and hardware development, to SMT circuit board assembly, to sheet metal
fabrication, to product testing ensuring that our products are engineered to last.
We currently hold several national and international patents and with our continued commitment to research and
development, we provide innovative products and technologies for the ever-evolving challenges of the HVAC
industry. Exporting over 70% of our sales, we have an exclusive distribution network around the globe that
provides comprehensive solutions to our worldwide customers.
About the Manual
These installation and operation instructions have been developed to facilitate the installation of the Steam
Humidifier.
The strict application of these instructions will ensure the conformity of your installation and
operation as per the manufacturer's recommendations.
The application of these instructions is one of the conditions for the application of the warranty.
The application of these instructions does not ensure, at any time conformity to procedures,
regulation or local codes, regarding electric installation and connection to local water supply.
This product has been declared to conform to applicable European safety and electromagnetic compatibility
standards and directives and bear the CE mark. The certificate of conformity CE is available upon request to the
manufacturer.
2017©: All rights reserved. This document cannot be reproduced totally or partially by any means whether,
electronic, mechanical, photocopy, recording or other, without prior written authorization of Neptronic.
Electricity
All work concerned with electrical installation MUST only be performed by skilled and qualified
technical personnel such as an electrician or a technician with appropriate training). The
customer is always responsible for ensuring the suitability of the technical personnel.
Please observe the local regulations concerning the provision of electrical installations.
Correct Use
Neptronic systems and its products are designed only for humidification use. Any other application is not
considered appropriate for the intended purpose. The manufacturer cannot be made liable for any damage
resulting from incorrect use.
General Warranty
This product is subject to the terms and conditions described at http://www.neptronic.com/Sales-
Conditions.aspx.

ii
Table of contents
1. Presentation ................................................................................................................................................ 3
1.1. Overview....................................................................................................................................................3
1.2. Definition....................................................................................................................................................4
2. Characteristics............................................................................................................................................ 5
2.1. Dimensions & weight.................................................................................................................................5
2.2. Option –Weather proof enclosure general dimension and weight...........................................................6
3. Mechanical installation............................................................................................................................... 7
3.1. General recommendations........................................................................................................................7
3.2. Positioning.................................................................................................................................................7
3.3. Wall mounting............................................................................................................................................7
3.4. Weather proof enclosure unit positioning and mounting...........................................................................8
4. Steam dispersion system selection and positioning.............................................................................. 9
4.1. Steam dispersion system selection...........................................................................................................9
4.2. Positionning of S.A.M or S.A.M.E2 .........................................................................................................11
5. Steam output connection......................................................................................................................... 14
5.1. Typical installation...................................................................................................................................14
5.2. General recommendations......................................................................................................................14
5.3. Installation of “S” traps on the steam line................................................................................................14
5.4. Position of steam output..........................................................................................................................15
5.5. Installation of humidifier with Space Distribution Unit (SDU) ..................................................................16
6. Plumbing connection ............................................................................................................................... 17
6.1. Water supply............................................................................................................................................17
6.2. Drain connection .....................................................................................................................................18
6.3. Weather proof enclosure plumbing connection.......................................................................................18
7. Power supply connections ...................................................................................................................... 19
8. Low voltage control connections............................................................................................................ 20
8.1. Modulating Humidifier..............................................................................................................................20
8.2. Common Alarm Connections ..................................................................................................................23
8.3. Controls Placement (steam dispersed into a duct or AHU) ....................................................................23
9. BACnet® interface set-up ........................................................................................................................ 24
9.1. Locating BACnet interface PCB..............................................................................................................24
9.2. BACnet® port and interface Dip switches setting ...................................................................................24
10. Front panel display features.................................................................................................................... 25
10.1. ''OFF'' Mode.........................................................................................................................................26
10.2. Scroll Mode..........................................................................................................................................26
10.3. Alarm messages..................................................................................................................................26
10.4. Programming mode.............................................................................................................................28
10.5. User Adjustment & Diagnostic menu...................................................................................................30
11. Start up procedure.................................................................................................................................... 31
12. Service ....................................................................................................................................................... 32
12.1. General................................................................................................................................................32
12.2. Evaporation chamber cleaning............................................................................................................32
13. Exploded view & Bill of Material.............................................................................................................. 35
13.1. Exploded view......................................................................................................................................35
13.2. Bill of Material ......................................................................................................................................36
14. Trouble shouting guide............................................................................................................................ 38
15. Notes.......................................................................................................................................................... 41

SKE BACnet Steam Humidifier
Installation Instructions and User Manual
3
1. Presentation
Thank you for your confidence in our Neptronicproduct. You have purchased the best and the most robust
humidifier for its category.
1.1. Overview
1.1.1. List of accessories supplied
2 sets of keys.
2 adjustable collars for the connection of the steam hose for each steam output.
1 female compression fitting ¾”(DN20) hydraulic for the drain output of the evaporation
chamber.
1 female compression fitting ½”(DN15) hydraulic for the drain output of the drip pan.
1 flexible hose for the water supply connection.
1 Installation Instructions and User Manual.
1.1.2. Overview of the Humidifier
(Illus. 1)
Options avalaible
The following options are available when purchasing a SKE humidifier:
Modulating control humidifier –suffix M (i.e. SKE20M)
Humidifier for system supplied with Deionised water or Reverse Osmosis water,
dissolved solids more than 1 ppm (SF DI-APPLICATION)
Humidifier for system supplied with Deionised water or Reverse Osmosis water,
dissolved solids more than 0.028 ppm (SF ULTRAPURE-DI)
Space Distribution Unit mounted on humidifier (SDU) or remote installation (SDU-REM)
Network communication system, BACnet –suffix B (i.e. SKE20M-400-3B)
Stainless steel humidifier cabinet –suffix P (i.e. SKE20M-400-3P)
Dry contact to activate an external fan relay on a call for humidity (SF SK300FANRELAY)
Access door to
mechanical
compartment
Heater element
connector
Heater element
Level sensor
chamber
Water supply valve Electrical
compartment
Evaporation
chamber
Control panel
neptronic
Evaporation
chamber
drain pump
Internal Drain
Cooler chamber

SKE BACnet Steam Humidifier
Installation Instructions and User Manual
4
1.2. Definition
1.2.1. Evaporation chamber
Assembly including the metal cylinder and a cover equipped with one or several heater elements.
It is the heart of the humidifier, which produce steam.
1.2.2. SDU (Space Distribution Unit)
Integrated steam distribution unit, optional on certain humidifiers.
1.2.3. Multi-Steam system
Custom made system of steam distribution. This system is designed to allow very short
absorption distances (less than 900mm).
1.2.4. S.A.M. (Steam Absorption Manifold)
Steam manifold adapted to air duct size to allow steam absorption in relatively short distance
(less than 1500mm).
1.2.5. S.A.M.E2 (Steam Absorption Manifold with 2 Eyelets)
Steam manifold with two eyelets adapted to application with restricted air duct dimensions to
allow steam absorption in relatively short distance (less than 1500mm).
1.3. Output and Power Consumption
Model
Steam
Consumption
Output
Capacity
(Kg/Hr)
Power
(KW)
Current (A)
Qty
Diam
(mm)
230V
1 phase
400 V
3 Phases
SKE05
5
3,7
16
5,5
1
35
SKE10
10
7,5
33
11
1
35
SKE20
20
15
-
22
1
35
SKE30
30
22
-
33
2
35
SKE40
40
30
-
44
2
35
SKE50
50
36
-
53
2
54
SKE60
60
44
-
64
2
54
SKE80
80
60
-
87
3
54

SKE BACnet Steam Humidifier
Installation Instructions and User Manual
5
2. Characteristics
(Illus. 2)
2.1. Dimensions & weight
Model
Dimension of the cabinet (mm)
Weight
Option SDU
Size
A
B
C
D
E
Empty
lb (kg)
Full
lb (kg)
SKE05
Small
597
470
292
140
737
44 (20)
57 (26)
SDU-1
SKE10
Medium
724
533
318
165
890
66 (30)
115 (52)
SDU-2
SKE20
Medium
724
533
318
165
890
SDU-2
SKE30
Medium
724
533
318
324
1048
SDU-3
SKE40
Medium
724
533
318
324
1048
SDU-3
SKE50
Large
794
813
318
-
-
110 (50)
205 (93)
-
SKE60
Large
794
813
318
-
-
-
SKE80
Large
794
813
318
-
-
-
Options:
On modulating humidifier, the maximum steam output can be programmed with the function
''LOCK ON'' in Program mode.
WARNING (MODULATING HUMIDIFIER): THE MAXIMUM POWER OF THE ELECTRICAL
INSTALLATION SHOULD BE IN ACCORDANCE WITH THE ABOVE TABLE, DO NOT TAKE
ACCOUNT A POSSIBLE REDUCTION OF STEAM OUTPUT, DUE TO MODULATION.
B
AE
D
Steam Humidifier
SKE
SDU
Space Distribution
Unit (option)
C

SKE BACnet Steam Humidifier
Installation Instructions and User Manual
6
2.2. Option –Weather proof enclosure general dimension and weight
Steam Outlet
Supply Water ½” NPT
(DN15)
Pan Drain ¾” (DN20)
Main Drain ¾” (DN20)
Electrical Control
(Knockout Hole)
Power Supply
(Knockout Hole)
Heat Sinks
(for Modulating
Units only)
B
A
C
Alphanumeric
Display Window
(Illus. 2a)
Model
Dimensions of the cabinet (mm)
A
B
C
Weight (kg)
Empty
Full of water
SKE05
892
682
287
30
36
SKE10
1034
784
338
43
65
SKE20
SKE30
SKE40
SKE50
1034
1063
338
75
118
SKE60
SKE80

SKE BACnet Steam Humidifier
Installation Instructions and User Manual
7
3. Mechanical installation
3.1. General recommendations
CAUTION: RISK OF ELECTRIC SHOCK. DISCONNECT THE APPLIANCE FROM THE ELECTRIC
SUPPLY BEFORE TO PROCEED TO INSTALLATION.
IMPORTANT:Mechanical installation should conform to local codes and regulations.
Location: Plan a location easy to access in order to permit an easy inspection and servicing of the
humidifier.
Do not install humidifier where failure of the appliance could cause damage to the building structure or to
costly equipment.
This location should be well ventilated; the ambient temperature should not exceed 30C.
Typically, the total steam line length between the humidifier and the steam distributor depends on the
steam line material type:
For flexible steam hose: the total steam line length should not exceed 5 meters. For longer distances
use insulated hard piping.
For insulated hard piping: the total steam line length should be determined by the humidifier capacity:
0,67m for each kg/h capacity of the humidifier, with a maximum of 15m. For longer steam line runs,
consult factory.
3.2. Positioning
The front panel and the right side (electrical compartment)
should be accessible in order to permit the servicing.
Leave a clearance of at least 1,25m to the front panel and
0,6m to the right side.
The humidifier should be mounted at a minimum of 1m to
1,2m above floor level.
Leave a clearance of at least 0,25m under the humidifier for
installation of water supply, drain piping and electrical
connections.
3.3. Wall mounting
Use the keyholes located on the back panel of the humidifier.
Before to proceed to the wall mounting, take off the
Evaporation chamber sub assembly (see section 12,
Servicing).
Check the solidity of the chosen support or wall (bricks,
concrete, stud partition wall, etc) on which the humidifier will
be mounted.
Drill holes for the upper anchors (holes with eyelet) into the
support or wall as per dimensions specified in the table
(illus.4).
The holes dimensions (diameter and depth) should by in
accordance with the recommendations of the chosen anchors.
Install then bolt anchors, if required.
Screw-on the 2 or 3 upper screws (holes with eyelet) of a
minimum diameter of #10 (6mm) (screws are not supplied).
Leave a clearance between head screws and wall in order to
permit the mounting of the humidifier.
Use the keyholes located on the back panel of the humidifier.
Hang on the humidifier to the 2 or 3 screws; it is preferable let
the front door open during this operation.
According to the size and weight of the humidifier, you may
need the help of a second person to assist you.
When the humidifier is positioned on the upper screws, tighten
the screws to secure the humidifier.
If applicable, install and secure lower screws.
Positioning (Illus. 3)
Front view (Illus. 4)
(0,60 m)
(0,25 m) (1 to 1,2 m)
10'’
24'’
39 to 48'’
E
neptronic

SKE BACnet Steam Humidifier
Installation Instructions and User Manual
8
Model
Dimensions mm
A
B
C
D
E
F
G
SKE05
-
202
165
516
-
-
-
SKE10, SKE20,
SKE30, SKE40
-
254
203
625
276
203
254
SKE50, SKE60,
SKE80
102
305
265
698
276
576
-
3.4. Weather proof enclosure unit positioning and mounting
20" (51cm)
minimum
24" (60cm)
minimum
42" (107cm)
minimum
24" (60cm)
minimum
(Illus. 4a)
dimensions in bracket are in cm
General
Recommendations
The humidifier should be installed in an easily accessible location to allow proper
access for inspection and servicing of the humidifier. The unit should never be
installed in a location where unusual malfunction of the unit can cause damage to
the building structure or to costly equipment.
Minimum
Clearances
Minimum clearances are :
Top, 51 cm minimum
Both sides, 60 cm minimum
Front, 107 cm minimum
Note: Above minimum clearances are indicated for inspection and servicing
access.
The humidifier is designed to be installed directly on the floor/roof or a curb.
Provide a level, solid foundation for the humidifier.
Ensure that the floor/roof beneath the humidifier is water proof to withstand any
water spillage during servicing or if a problem occurs.
Attach securely and safely the SK enclosure.

SKE BACnet Steam Humidifier
Installation Instructions and User Manual
9
4. Steam dispersion system selection and positioning
4.1. Steam dispersion system selection
In order to prevent the accumulation of condensation in air ducts, NEP has designed 4 basic
configurations of steam distribution to provide the client with the most economical solution for any
particular application.
4.1.1. S.A.M. (steam absorption manifold) Horizontal duct
(Illus. 5)
The SAM is to be installed
where absorption distances
are short, less than 1500mm,
and/or low duct temperatures
are in effect.
4.1.2. S.A.M.E2 (steam absorption manifold) Horizontal duct
(Illus. 6)
The SAME2 is to be installed
where absorption distances are
short, less than 1500mm and/or
low duct temperatures are in
effect. SAME2 are used in
applications with restricted duct
dimensions.
air
900
air

SKE BACnet Steam Humidifier
Installation Instructions and User Manual
10
4.1.3. S.A.M. or S.A.M.E2 (steam absorption manifold) Vertical duct
(Illus. 7)
SAM or SAME2 for vertical ducts
are used where the absorption
distances are normal and the
client requires an economical as
well as an efficient solution.
4.1.4. Multi-Steam system
(Illus.8)
The Multi-Steam system is to be
installed in critical locations in air
handling systems, particularly
where absorption distances are
very short, less than 900mm, or
low air duct temperatures are in
effect.
The Multi-Steam is custom made
to the dimensions of duct or AHU.
Instructions to install Multi-Steam
system are described in a specific
installation instructions manual
enclosed with the Multi-Steam
system.
S.A.M.
S.A.M.E2.
45°
45° 45°
air
air
air

SKE BACnet Steam Humidifier
Installation Instructions and User Manual
11
4.2. Positionning of S.A.M or S.A.M.E2
4.2.1. Duct mounting
Steam manifold should be mounted and
secured through the side of the air
handling unit or duct. Provision should be
made for safe accessibility, ideally with an
observation light and window.
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
35mm
51mm
54mm
78mm
(Illus. 9)
WARNING: Risk of condensing. Ensure
that the minimum distance of the end of
the manifold is at least 102mm from the
top of the duct.
Minimum distance (Illus. 10)
4.2.2. Recommendations for SAM distribution pipes
Model
Maximum
Capacity
Outlet
Distribution pipes
Maximum
static
pressure
kg/hr
Qty
Diameter
Minimum
length
Maximum
length
mm
mm
mm
(Pa)
SKE05
5
1
35
300
600
1245
SKE10
10
600
1200
SKE20
20
SKE30
30
2
SKE40
40
SKE50
50
54
800
1600
SKE60
60
SKE80
80
3
Note: For higher static pressure, please contact the manufacturer.
5'’
(120mm)
5'’
(120mm)
ØA
4'’ minimum
(102mm)

SKE BACnet Steam Humidifier
Installation Instructions and User Manual
12
4.2.3. Placement of steam pipe in horizontal duct
35mm diameter pipe
1 pipe (Illus. 11)
2 pipes (Illus. 12)
54mm diameter pipe
2 pipes (Illus. 13)
3 pipes (Illus. 14)
Note: 54mm steam pipe must be supported on the end by appropriate duct hanger or
strap (supplied by others).
H
10'’ minimum
(250mm)
1/3 H
air
air
H
10'’ minimum
(250mm)
3'’ minimum
(80mm)
8'’
(200mm)
6'’ minimum
(150mm)
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

SKE BACnet Steam Humidifier
Installation Instructions and User Manual
13
4.2.4. Placement of steam pipe in vertical duct
Eyelet orientation
3D view (Illus. 15)
(Illus. 16)
35mm diameter pipe
1 pipe (Illus. 17)
2 pipes (Illus. 18)
54mm diameter pipe
2 pipes (Illus. 19)
3 pipes (Illus. 20)
air
air
45°
air
45°
S.A.M S.A.M.E2
W
10’’ minimum
(250mm)
1/2 W
W
24’’ minimum
(600mm)
1/2 W 1/4 W1/4 W
W
24’’ minimum
(600mm)
1/2 W 1/4 W1/4 W
W
36’’ minimum
(900mm)
1/3 W 1/3 W
1/6 W 1/6 W

SKE BACnet Steam Humidifier
Installation Instructions and User Manual
14
5. Steam output connection
5.1. Typical installation
(Illus. 21)
5.2. General recommendations
Please follow these general rules of installation in order to avoid any static pressure inside distribution
pipes and into the humidifier evaporation chamber, and also to avoid any condensation accumulation.
a) The slope of the steam hose (rigid or flexible)
should not be less than 15% (7 horizontal length for
1 vertical length) in order to ensure continuous
drainage of condensation back to humidifier or to
steam trap.
b) Total length of the flexible steam hose should not
exceed 5 meters. Longer runs will result in added
condensation losses. Whenever possible, use
insulated copper piping. Flexible steam hose should
be used for short runs (up to 5m) or for
interconnecting between the rigid pipes.
c) Whenever using rigid copper, these ones should
be insulated to diminish condensation build up.
(Illus. 22)
5.3. Installation of “S” traps on the steam line
The lowest point of any steam hose or rigid pipe must be the humidifier. If necessary a steam
separator (S trap) should be installed higher than the static pressure of the system by at least 51mm.
(Illus. 23)
(Illus. 24)
15 %
2
7
2
4
4
3
3
5
1
1
1
6
Humidifier
Incorrect installation
8"
15% 15%
Use "S" separator
when ceiling space is
limited and you need
to create 15% slopes
Steam outlet
Use ‘’S’’ separator when
the steam distributor is
lower than the humidifier
steam outlet
8'’
(203mm)
15%
1
Clamps
2
Flexible hose
3
Rigid copper pipe
4
Insulation
5
Steam distribution manifold
6
Duct
7
Long radius copper pipe

SKE BACnet Steam Humidifier
Installation Instructions and User Manual
15
5.4. Position of steam output
Model
Dimensions mm
Small
Cabinet
I
J
SKE05
110
122
Medium
Cabinet
K
L
M
SKE10
SKE20
-
102
143
SKE30
SKE40
134
102
143
Large
Cabinet
N
O
P
Q
SKE50
SKE60
SKE80
179
179
132
144
(Illus. 25)
I
J
L
M
Small Cabinet
(SKE05)
Medium Cabinet
(SKE10-20)
Medium Cabinet
(SKE30-40)
L
M
K
Large Cabinet
(SKE50-60)
Large Cabinet
(SKE80)
P
Q
O N
P
Q
O N

SKE BACnet Steam Humidifier
Installation Instructions and User Manual
16
5.5. Installation of humidifier with Space Distribution Unit (SDU)
The SDU should be installed in an
environment where the air is relatively
clean. This will avoid the blower from
getting clough with dust.
The humidifier should be mounted such
that the SDU fan section is at least 2m
above the floor.
A minimum clearance of 0.45m from the
ceiling should be allocated to avoid
ceiling and wall condensation.
If additional ventilation is not present,
the fan should have a clearance from
the ceiling of at least 1.35m. Proper
ventilation must be observed to avoid
ceiling and wall condensation.
SDU remote installation:
The SDU can be in a different location
from the humidifier (remote SDU).
Please follow the piping
recommendations (section 5.2).
Mount the SDU to the wall on brackets
(not supplied), do not drill mounting
holes thru the cabinet of the SDU.
Connect the steam hose(s) to the
bottom inlet(s) of the SDU to the top of
the steam outlet(s) of the humidifier.
Secure the hose(s) with the supplied
hose clamp.
Connect the condensate hose to the
bottom of the SDU to an open drain.
Connect the electrical wires from the
SDU to the top of the humidifier. Field
wiring must conform to local codes.
The fan of the SDU will operate for a period
of four minutes after steam production has
stopped to prevent condensation.
Avoid any obstruction of the ventilation
openings on top of the SDU.
Maintenance of the SDU:
Clean the blower if there is an
accumulation of dust.
SDU mounted on humidifier (Illus. 26)
SDU remote installation (Illus. 27)
18'’
(0,45 m)
78'’
(2 m)
Without
additional
ventilation
54'’ (1,35 m)
E
ne pt r o n ic
18'’
(0,45 m)
78'’
(2 m)
Field piping
(not supplied)
Without
additional
ventilation
54'’ (1,35 m)
4'’
(0.10m)
Field wiring
(by others)
2nd pipe
for SDU2 or SDU3 E
nep t r o n ic

SKE BACnet Steam Humidifier
Installation Instructions and User Manual
17
6. Plumbing connection
CAUTION: Water supply installation should conform to local codes and regulations. Any installation work
must be carried out by suitably qualified personnel.
The operation of SKE series humidifier is independent of variable water conditions, with soft or hard water.
Therefore, for normal operation, no pre-treatment of water is necessary.
Bottom view (Illus. 28)
Model
Dimensions (mm)
A
B
C
D
E
SKE05
165
51
232
105
44
SKE10
SKE20
SKE30
SKE40
184
44
248
105
44
SKE50
SKE60
SKE80
179
44
248
105
44
(Illus. 29)
6.1. Water supply
Water inlet specifications:
Inlet water pressure: 0,7 to 4,8 bars (10 to 70 psig)
Maximum temperature: 30C maximum
3/8'' (DN10) standard copper water line connection
A shut off valve (not supplied) should be installed in the water supply line to the unit, close to the
humidifier to facilitate servicing.
It is recommended to install a standard water strainer in the water supply line.
It is recommended to install a water hammer arrestor, in order to absorb hydraulic shock and minimize
water hammer when the fill valve closes.
Please follow the steps described below:
Connect 15mm water supply pipe to the flexible hose (supplied).
Finger tighten the swivel top 20mm fitting to the male threaded part of the valve.
CAUTION: RISK OF DAMAGE TO THE VALVE. DO NOT USE WRENCH TO TIGHEN SWIVEL.
(Illus. 30)
A
B
C
D E
Minimum
500mm Minimum
200mm
Minimumbuildingsidedrainof42mmØ
SKE Humidifier
22mm Ø
15mm Ø
Base plate of
humidifier
Male threaded part of
the valve
Fill valve
(Intern)
Water supply flexible
hose (p/n SP 6842)

SKE BACnet Steam Humidifier
Installation Instructions and User Manual
18
6.2. Drain connection
CAUTION: Water drain installation should conform to local codes and regulations. Any installation work
must be carried out by suitably qualified personnel.
Drain connection specification:
Evaporation chamber water drain temperature: 60C.
Standard hydraulic compression fittings: a 20mm (evaporation chamber drain) and a 15mm (Pan
drain).
2 hydraulic threaded fitting located under the humidifier (see Illus. 29) must be connected to the drain
pipe.
Use standard copper hydraulic pipes 20mm and 15mm.
Ensure that the drain pipe dimension is sufficient, especially if more than one humidifier is evacuating into
the same drain line.
6.3. Weather proof enclosure plumbing connection
Pan Drain ¾” (DN20) Main Drain ¾” (DN20) Copper pipe (by others) field installed for
connection to side outlets
Supply Water ½” NPT
(DN15)
Electrical Control
(Knockout Hole)
Power Supply
(Knockout Hole)
(Illus. 30a - Front view)
Steam Outlet
Supply Water ½” NPT
(DN15)
Pan Drain ¾” (DN20)
Main Drain ¾” (DN20)
Electrical Control
(Knockout Hole)
Power Supply
(Knockout Hole)
Heat Sinks
(for Modulating
Units only)
(Illus. 30b - Side view)
The weather proof enclosure is equipped with a normally open valve, enabling the humidifier to drain all
water during a power failure, in order to prevent water from freezing within the unit. During normal
operation, the humidifier reduces drain water temperature to 60°C.
Caution: During a power failure, the drain water temperature is not reduced. Installed drain
piping must be rated to 100°C.

SKE BACnet Steam Humidifier
Installation Instructions and User Manual
19
7. Power supply connections
CAUTION: RISK OF ELECTRIC CHOC. DISCONNECT THE HUMIDIFIER FROM THE ELECTRIC
SUPPLY BEFORE TO PROCEED TO THE CONNECTION.
WARNING: RISK OF FIRE. Do not interchange the power terminal block designated L1, L2 and L3 with
Low voltage terminal block designated 1, 2 and 3.
The wiring to the Humidifier should be done by a qualified electrician, and conforming to the procedure,
regulation and local codes.
Use only coppers conductors.
An external over current protection and disconnect circuit breaker should be installed on the supply
adjacent to the humidifier.
A knock out (not supply) should be installed at the bottom of the electrical compartment of the humidifier
for strain relief of the supply cable.
Ensure that the size of the wire conductors is appropriate for the current supplied.
Ensure that each terminal connection is properly secured.
The ground conductor should be equipped with ring terminal and should be connected directly to the
electrical panel on the indicated location.
1 Phase Connection
(Illus. 31
3 Phases Connection
(Illus. 32)
L1 L2
PHASE 2
PHASE 1
GND
L1 L2 L3
PHASE 2 PHASE 3
PHASE 1
GND