Steam Humidifier SK300 series BACNET

Steam Humidifier SK300 series BACNET
Steam Humidifier
SK300 series
BACNET
Installation instruction & user
manual
READ AND SAVE THESE INSTRUCTIONS
SK300B-ENG/131024
SK300 Humidifier
Foreword
Foreword
1. These installation instructions and operation manual have been developed to facilitate the installation and the
operation of the SK300 series steam humidifier.
The strict application of these instructions will ensure the conformity of your installation and operation as per
manufacturer's recommendations.
2. The application of these instructions is one of the conditions for the application of the warranty.
3. 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.
4. This product has been declared to conform to applicable Canadian and American safety standards and
directives and bear the CSA (c) & (us) mark. The certificate of conformity CSA is available upon request to the
manufacturer.
5.  2013: All right reserved, this document cannot be reproduced totally or partially by any mean whether,
electronic, mechanical, photocopy, recording or other, without prior written authorization of National
Environmental Products Ltd.
Manufacturer Presentation
National Environmental Products Ltd. (NEP) is the owner of the brand Neptronic.
NEP develops, manufactures and services a complete line of:
 Steam humidifiers,
 Humidistat among the most precise and the most reliable on the market,
 Actuators to regulate air damper or valves,
 Electric heaters,
 Thermostats and other control peripherals used to control HVAC equipment.
For more information about our products, visit our web site at www.neptronic.com
Each Neptronic product benefits from over 35 years of experience of our qualified staff.
From the inspiration to realization, innovation has been the standard in design. As the result of this dedication, NEP Ltd.
owns several patents, notably the ENERDRIVE system and the AFEC system.
Manufacturing is conducted on the premises of our modern 80,000 sq.ft. (7 000m2) facility in Montreal, Canada.
Our quality system is built on the ISO 9001 model.
Our vision '' Customer for Life'' is realized by listening to their needs and by supplying them with products, which
exceed their expectations in quality, functionality and durability.
National Environmental Products Ltd.
Tel. (Toll free): 1 800 361-2308
Tel.: (1) (514) 333-1433
Fax: (1) (514) 333-3163
Fax Customer service: (514) 333-1091
Business hours: from Monday to Friday, 8:00am to 5:00pm (Eastern time)
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SK300 Humidifier
Table of contents
Table of contents
Foreword and Manufacturer Presentation.……………….…….……………………………………………………………….i
1.
Presentation.............................................................................................................................................................. 2
1.1.
1.2.
2.
Overview ................................................................................................................................................................................. 2
Definition ................................................................................................................................................................................. 3
Characteristics ......................................................................................................................................................... 4
2.1.
2.2.
2.3.
3.
Dimensions & weight ............................................................................................................................................................... 4
Option – Weather proof enclosure general dimension and weight .......................................................................................... 5
Output and power consumption............................................................................................................................................... 6
Mechanical installation............................................................................................................................................ 7
3.1.
3.2.
3.3.
3.4.
4.
General recommendations ...................................................................................................................................................... 7
Positioning............................................................................................................................................................................... 7
Wall mounting.......................................................................................................................................................................... 7
Weather proof enclosure unit positioning and mounting.......................................................................................................... 8
Steam dispersion system selection and positioning ........................................................................................... 9
4.1.
4.2.
5.
Steam dispersion system selection ......................................................................................................................................... 9
Positionning of S.A.M or S.A.M.E2........................................................................................................................................ 11
Steam output connection ...................................................................................................................................... 14
5.1.
5.2.
5.3.
5.4.
5.5.
6.
Typical installation ................................................................................................................................................................. 14
General recommendations .................................................................................................................................................... 14
Installation of “S” traps on the steam line .............................................................................................................................. 14
Position of steam output ........................................................................................................................................................ 15
Installation of humidifier with Space Distribution Unit (SDU) ................................................................................................. 16
Plumbing connection............................................................................................................................................. 17
6.1.
6.2.
6.3.
7.
8.
Water supply ......................................................................................................................................................................... 17
Drain connection ................................................................................................................................................................... 18
Weather proof enclosure plumbing connection ..................................................................................................................... 18
Power supply connections.................................................................................................................................... 19
Low voltage control connections ......................................................................................................................... 20
8.1.
8.2.
8.3.
9.
Modulating Humidifier............................................................................................................................................................ 20
Common Alarm Connections................................................................................................................................................. 22
Controls Placement (steam dispersed into a duct or AHU) ................................................................................................... 23
BACnet® interface set-up ..................................................................................................................................... 24
9.1.
9.2.
10.
10.2.
10.3.
10.4.
10.5.
11.
12.
12.1.
12.2.
13.
13.1.
13.2.
Locating BACnet interface PCB ............................................................................................................................................ 24
BACnet® port and interface Dip switches setting .................................................................................................................. 24
Front panel display features ................................................................................................................................. 25
Scroll Mode ........................................................................................................................................................................... 26
Alarm messages.................................................................................................................................................................... 26
Programming mode............................................................................................................................................................... 28
User Adjustment & Diagnostic menu..................................................................................................................................... 30
Start up procedure ................................................................................................................................................. 31
Service..................................................................................................................................................................... 32
General ................................................................................................................................................................................. 32
Evaporation chamber cleaning .............................................................................................................................................. 32
Exploded view & Bill of Material........................................................................................................................... 35
Exploded view ....................................................................................................................................................................... 35
Bill of material........................................................................................................................................................................ 36
14.
Trouble shooting guide ......................................................................................................................................... 38
General condition of Sale & Warranty...……………………………………………………….……………………………….41
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SK300 Humidifier
User Manual
1.
Presentation
Thank you to have chosen one of the Neptronic products. 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 hydraulic for the drain output of the evaporation chamber.
1 female compression fitting ½ hydraulic for the drain output of the drip pan.
1 female fitting and a braided hose for the water supply connection.
1 Installation instruction and operation manual.
1.1.2.
Overview of the Humidifier
Heater element
connector
Evaporation
chamber
nept
Internal Drain
Cooler chamber
r o n ic
Evaporation
chamber
drain pump
Heater element
Level sensor
chamber
Access door to
mechanical
compartment
Water supply valve
Control panel
Electrical
compartment
(Illus. 1)
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SK300 Humidifier
User Manual
1.1.3.
Options avalaible
The following options are available when purchasing a SK300 humidifier:







1.2.
1.2.1.
Modulating control humidifier – suffix M (i.e. SK320M)
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. SK320M-600-3B)
Stainless steel humidifier cabinet – suffix P (i.e. SK320M-600-3P)
Dry contact to activate an external fan relay on a call for humidity (SF SK300FANRELAY)
Definition
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 3 feet or 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
5 feet or 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 5 feet or 1500mm).
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SK300 Humidifier
User Manual
2.
Characteristics
D
SDU
Space Distribution
Unit (option)
Steam Humidifier
A
E
C
B
(Illus. 2)
2.1.
Dimensions & weight
Dimensions of the cabinet inch (mm)
Model
Weight lb (kg)
Full of
Empty
water
A
B
C
D
E
23 ½
(597)
18 ½
(470)
11 ½
(292)
5⅝
(140)
29 ⅛
(737)
44
(20)
57
(26)
SDU-1
20 (9)
28 ½
(724)
21
(533)
12 ½
(318)
6⅝
(165)
35 ⅛
(890)
66
(30)
115
(52)
SDU-2
25 (11)
28 ½
(724)
21
(533)
12 ½
(318)
12 ⅞
(324)
41 ⅜
(1048)
66
(30)
115
(52)
SDU-3
45 (20)
31 ¼
(794)
32
(813)
12 ½
(318)
-
-
110
(50)
205
(93)
-
SK302
SK304
Option SDU
Model
Weight
lb (kg)
SK306
SK310
SK314
SK320
SK330
SK340
SK360
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SK300 Humidifier
User Manual
2.2.
Option – Weather proof enclosure general dimension and weight
C
S te a m o u tle t
A lp h a n u m e ric
d is p la y w in d o w
H e a t s in k fo r
m o d u la tin g u n its o n ly
S u p p ly w a te r 1 /2 " N P T
(1 5 m m )
A
P o w e r su p p ly
(k n o c k o u t h o le )
E le c trica l c o n tro l
(k n o c k o u t h o le )
M a in d ra in 3 /4 " (2 0 m m )
B
P a n d ra in 1 /2 " (1 5 m m )
(Illus. 2a)
Dimensions of the cabinet inch (mm)
Model
Weight lb (kg)
Empty
Full of water
A
B
C
28.5
(724)
25.8
(655)
11.3
(287)
66
(30)
79
(36)
34.5
(876)
29.8
(757)
13.3
(338)
95
(43)
144
(65)
34.5
(876)
40.8
(1036)
13.3
(338)
165
(75)
260
(118)
SK302
SK304
SK306
SK310
SK314
SK320
SK330
SK340
SK360
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SK300 Humidifier
User Manual
2.3.
Output and power consumption
Steam
Model
Consumption
Amperage (A)
Steam Output
Capacity
lb/hr (kg/hr)
Power
(KW)
240/1
208/1
208/3
480/1
480/3
600/1
600/3
SK302
6
(2.7)
2
8.5
10
-
4.5
-
3.5
SK304
12
(5.5)
4
17
19
11.5
8.5
5
SK306
18
(8)
6
26
30
16.5
13
SK310
30
(14)
10
-
-
28
SK314
40
(19)
13.5
-
-
SK320
60
(28)
20
-
SK330
90
(41)
30
SK340
120
(56)
SK360
180
(82)
Qty
Diameter
inch (mm)
-
1
1⅜
(35)
7
4
1
1⅜
(35)
7.2
10.5
6
1
1⅜
(35)
-
12
-
10
1
1⅜
(35)
38
-
16.5
-
13.5
1
1⅜
(35)
-
*
-
25
-
20
2
1⅜
(35)
-
-
-
-
36
-
30
2
1⅜
(35)
40
-
-
*
-
50
-
40
2
2⅛
(54)
60
-
-
-
-
72
-
60
3
2⅛
(54)
* Available, please consult factory.
Option:
 On modulating humidifier, the maximum steam output can be programmed with the function ''LOCK ON'' in
Program mode.
WARNING (MODULATING HUMIDIFIER): 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.
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SK300 Humidifier
User Manual
3.
Mechanical installation
3.1.




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 85F (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 16 feet (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: one
equivalent foot for each lb/h capacity of the humidifier (0,67m for each kg/h), with a maximum of 50 feet
(15m). For longer steam line runs, consult factory.
3.2.


General recommendations
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 48” (1,25m) to the front panel and 24”
(0,6m) to the right side.
The humidifier should be mounted at a minimum of 39” (1m) to 48”
(1,2m) above floor level.
Leave a clearance of at least 10” (0,25m) under the humidifier for
installation of water supply, drain piping and electrical connections.
24'’
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.
(0,60 m)
10'’
(0,25 m)
39 to 48'’
(1 to 1,2 m)
Positioning (Illus. 3)
Front view (Illus. 4)
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SK300 Humidifier
User Manual
Model
Dimensions inches (mm)
C
D
E
A
B
SK302, SK304, SK306
-
8 (202)
5 3/16 (165)
19 ¾ (516)
SK310, SK314,
SK320, SK330
-
10 (254)
8 (203)
SK340, SK360
4 (102)
12 (305)
10 ½ (265)
3.4.
F
G
-
-
-
24 ⅝ (625)
11 (276)
8 (203)
10 (254)
27 ½ (698)
11 (276)
22 43/64
(576)
-
Weather proof enclosure unit positioning and mounting
20" (51cm )
m inim um
24" (60cm )
m inim um
cm )
(1 0 7
4 2 " im u m
m in
24"(60cm )
m inim um
(Illus. 4a)
dimensions in bracket are in cm
General
Recommendations
Minimum
Clearances
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 are :
 Top, 20’’ (51 cm) minimum
 Both sides, 24’’ (60 cm) minimum
 Front, 42’’ (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.
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SK300 Humidifier
User Manual
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
air
The SAM is to be installed where
absorption distances are short,
less than 5 feet (1500mm), and/or
low duct temperatures are in effect.
(Illus. 5)
4.1.2.
S.A.M.E2 (steam absorption manifold) Horizontal duct
air
900
The SAME2 is to be installed
where absorption distances are
short, less than 5 feet (1500mm)
and/or low duct temperatures are
in effect. SAME2 are used in
applications with restricted duct
dimensions.
(Illus. 6)
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SK300 Humidifier
User Manual
air
S.A.M. or S.A.M.E2 (steam absorption manifold) Vertical duct
air
4.1.3.
45°
S.A.M.
S.A.M.E2.
45°
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.
45°
(Illus. 7)
4.1.4.
Multi-Steam system
a ir
(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 3 feet
(900mm), or low air duct
temperatures are in effect.
The Multi-Steam is custom made
to the dimensions of duct or AHU.
Instructions to install Multi-Steam
system are described in a specific
installation instructions manual
enclosed with the Multi-Steam
system.
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SK300 Humidifier
User Manual
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
1 ⅜’’ (35mm)
2’’ (51mm)
2 ⅛’’ (51mm)
3’’ (78mm)
5'’
(120mm)
5'’
(120mm)
ØA
(Illus. 9)
4'’ minimum
(102mm)
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 (Illus. 10)
4.2.2.
Recommendations for SAM distribution pipes
Maximum
Capacity
Outlet
Model
Diameter
(lb/hr)
(kg/hr)
SK302
6
2.7
SK304
12
5.5
SK306
18
8
SK310
30
14
SK314
40
19
SK320
60
28
SK330
90
41
SK340
120
56
Qty
In
(mm)
Distribution pipes
Minimum
length
in.
(mm)
Maximum
length
in.
(mm)
12
(300)
24
(600)
24
(600)
48
(1200)
32
(750)
64
(1500)
Maximum
static pressure
in. of
water
(Pa)
5
1245
1
1⅜
(35)
2
2⅛
(51)
180
82
3
SK360
Note: For higher static pressure, please contact the manufacturer.
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SK300 Humidifier
User Manual
4.2.3.
Placement of steam pipe in horizontal duct
1 ⅜’’ (35mm) diameter pipe
6'’ minimum
(150mm)
H
10'’ minimum
(250mm)
air
H
10'’ minimum
(250mm)
air
3'’ minimum
(80mm)
1/3 H
8'’
(200mm)
1 pipe (Illus. 11)
2 pipes (Illus. 12)
2 ⅛’’ (51mm) diameter pipe
2/5 H
1/3 H
1/2 H
H
24'’ minimum
(600mm)
air
1/5 H
H
36'’ minimum
(900mm)
air
1/6 H
8'’
(200mm)
2 pipes (Illus. 13)
10'’
(250mm)
10'’
(250mm)
3 pipes (Illus. 14)
Note: 2 ⅛’’ (51mm) steam pipe must be supported on the end by appropriate duct hanger or
strap (supplied by others).
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SK300 Humidifier
User Manual
4.2.4.
Placement of steam pipe in vertical duct
air
air
air
Eyelet orientation
45°
45°
S.A.M
S.A.M.E2
(Illus. 16)
3D view (Illus. 15)
1 ⅜’’ (35mm) diameter pipe
W
24’’ minimum
(600mm)
W
10’’ minimum
(250mm)
1/4 W
1/2 W
1 pipe (Illus. 17)
1/4 W
1/2 W
2 pipes (Illus. 18)
2 ⅛’’ (51mm) diameter pipe
W
24’’ minimum
(600mm)
1/4 W
1/2 W
2 pipes (Illus. 19)
W
36’’ minimum
(900mm)
1/4 W
1/6 W
1/3 W
1/3 W
1/6 W
3 pipes (Illus. 20)
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SK300 Humidifier
User Manual
5.
Steam output connection
5.1.
Typical installation
6
5
1
3
1
4
2
15 %
7
1
4
3
2
Humidifier
1
2
3
4
5
6
7
Clamps
Flexible hose
Rigid copper pipe
Insulation
Steam distribution manifold
Duct
Long radius copper pipe
(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 16feet (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 16ft or 5m) or for
interconnecting between the rigid pipes.
c) Whenever using rigid copper, these ones should
be insulated to diminish condensation build up.
Incorrect installation
(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 2” (51mm).
15%
15%
Steam outlet
15%
8"
Use "S" separator
when ceiling space is
limited and you need
to create 15% slopes
8'’
(203mm)
Use ‘’S’’ separator when
the steam distributor is
lower than the humidifier
steam outlet
(Illus. 23)
(Illus. 24)
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SK300 Humidifier
User Manual
5.4.
Model
Position of steam output
Dimensions inches (mm)
Small
Cabinet
I
J
SK302
SK304
SK306
4 5/16
(110)
4 13/16
(122)
I
S m all C abinet
(S K 302-304-306)
J
M edium C abinet
(S K 310-314)
L
M
Medium
Cabinet
K
L
M
SK310
SK314
-
4
(102)
5 5/8
(143)
SK320
SK330
5 9/32
(134)
4
(102)
5 5/8
(143)
L
M edium C abinet
(S K 320-330)
K
M
Large C abinet
(S K 340)
Q
Large
Cabinet
N
O
P
Q
SK340
SK360
7
(179)
7
(179)
5 3/16
(132)
5 11/16
(144)
P
O
N
Large C abinet
(S K 360)
Q
P
O
N
(Illus. 25)
15
SK300 Humidifier
User Manual
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 78”
(2m) above the floor.
A minimum clearance of 18” (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 54” (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.
Without
additional
18'’
ventilation (0,45 m)
54'’ (1,35 m)
78'’
(2 m)
SDU mounted on humidifier (Illus. 26)
Without
18'’
additional
ventilation (0,45 m)
54'’ (1,35 m)
Field wiring
(by others)
4'’
(0.10m)
Field piping
(not supplied)
2nd pipe
for SDU2 or SDU3
78'’
(2 m)
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 remote installation (Illus. 27)
16
SK300 Humidifier
User Manual
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. Install a pressure relief valve if required by local code.
The operation of SK300 series humidifier is independent of variable water conditions, with soft or hard water.
Therefore, for normal operation, no pre-treatment of water is necessary.
C
SK300 Hum idifier
B
D
E
A
Bottom view (Illus. 28)
Model
SK302
SK304
SK306
SK310
SK314
SK320
SK330
SK340
SK360
A
Dimensions inches (mm)
B
C
D
E
6½
(165)
2
(51)
9⅛
(232)
4⅛
(105)
1¾
(44)
7¼
(184)
1¾
(44)
9¾
(248)
4⅛
(105)
1¾
(44)
7
(179)
1¾
(44)
9¾
(248)
4⅛
(105)
1¾
(44)
6.1.
1/2" (15m m ) Ø
3/4" (22m m ) Ø
M inim um
20"
(500m m )
M inim um 8"
(200m m )
M in im um bu
ild in g si de dr
ain of 1- ½ "
(4 0m m ) Ø
(Illus. 29)
Water supply

Water inlet specifications:
 Inlet water pressure: 10 to 70 psig (0,7 to 4,8
bars)
 Maximum temperature: 85F (30C) maximum
 3/8'' standard copper water line connection
 A shut off valve (not supplied) should be installed
in the water supply line to the humidifier, close to
the humidifier to facilitate servicing.
 It is recommended to install a standard water
strainer in the water supply line.
Fill valve
(Intern)
Base plate of
humidifier
Male threaded part of
the valve
Please follow the steps described below:
Swivel top

Connect 3/8'' copper pipe to the 3/8'' braided hose
(supplied).

Finger tighten the swivel top 3/4'' fitting to the
male threaded part of the valve.
CAUTION: RISK OF DAMAGE TO THE VALVE.
DO NOT USE WRENCH TO TIGHEN SWIVEL.
Elbow fitting
(p/n SP 6828)
Water supply
braided hose 3/8" (10mm)
(p/n SP 6843)
(Illus. 30)
17
SK300 Humidifier
User Manual
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: 140F (60C).
 Standard hydraulic compression fittings: a ¾ (evaporation chamber drain) and a ½ (pan drain).
2 hydraulic pipes located under the humidifier (see Illus. 29) must be connected to the drain pipe.
Use standard copper hydraulic pipes ¾” and ½”.
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
Supply water 1/2" NPT
(15mm)
Electrical control
(knockout hole)
Power supply
(knockout hole)
Pan drain 1/2" (15mm)
Main drain 3/4" (20mm)
Silicone tubing provided for
connection to side outlets
(Illus. 30a - Front view)
Supply water 1/2" NPT
(15mm)
Power supply
(knockout hole)
Pan drain 1/2" (15mm)
Main drain 3/4" (20mm)
Electrical control
(knockout hole)
(Illus. 30b - Side view)
18
SK300 Humidifier
User Manual
Power supply connections




1 Phase Connection
3 Phases Connection
L1 L2 L3
L1 L2
GND
PHASE 3


PHASE 2

PHASE 1

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.
PHASE 2

PHASE 1
7.
GND
(Illus. 31)
(Illus. 32)
19
SK300 Humidifier
User Manual
Low voltage control connections
8.1.
Modulating Humidifier
8.1.1.
Humidity controlled by humidistat (external mode)
Connection to HRO20 humidistat.
F
1
2
3
4
5
6
7
8
2
14
16
24 VAC
MOD
% RH
H R O 20
1
COM
8.
9
NC
NO
COM
A larm
C ontact
P D sw itch
H igh Lim it
24 V A C
Interlock *
(Illus. 33)
Note: If interlock is not used, jumper between terminal F & 5 must be installed
Note: If the humidifier is equipped with a Space Distribution Unit (SDU), the PD switch is already factory
wired inside the SDU, do not wire the terminal #2.
20
SK300 Humidifier
User Manual
8.1.2.
Humidity controlled by humidifier (internal mode)
Humidity controlled by humidifier, using SHR10 or SHC80 as space sensor.
5
6
7
8
4
S H R 1 0 or S H C 80
1
2
3
% RH
3
24 VAC
2
1
COM
F
9
NC
NO
COM
A larm
C o n ta ct
P D sw itch
H ig h L im it
24 VAC
Interlo ck *
(Illus. 34)
Note: If the humidifier is equipped with a Space Distribution Unit (SDU), the PD switch is already factory
wired inside the SDU, do not wire the terminal #2.
VAV system with humidity controlled by humidifier, using SHC80 as high limit duct sensor and SHR10 or
SHC80 as space sensor.
5
6
7
8
1
2
3
1
2
3
% RH
SHR10 or SHC80
24 VAC
SHC80
(high limit)
4
COM
3
% RH
2
24 VAC
1
COM
F
9
NC
NO
COM
Alarm
Contact
PD switch
High Limit
24 VAC
Interlock *
(Illus. 35)
Note: if interlock is not used, jumper between terminal F & 5 must be installed.
21
SK300 Humidifier
User Manual
8.1.3.
Control Signals
F 1
2
3
4
5 6 7
8
9
On BACNET SK300 Humidifier the
selection of the control signal is made
through the menu. See §11.2
Please wire the control input to terminal 3
and 4 as indicated on the diagram beside
0-10 or
Vdc
+ or
0-20 or
mA
2-10
Vdc
2-20
mA
(Illus. 36)
8.2.
Common Alarm Connections
A volt free contact is provided in the form of both a normally open and normally closed contact that will switch in
the event of an alarm on the SK300 humidifier.

Wherever possible it is recommended to use
the normally closed contact. This contact will
open in the event of a humidifier fault.

These contacts should be used to switch a
low voltage, ideally 24V, with a switching
current of no more than 3 Amps.
F
1
2
3
4
5
6
7
8
9
Common
Normally Open
Normally Closed
(Illus. 37)
22
SK300 Humidifier
User Manual
8.3.
Controls Placement (steam dispersed into a duct or AHU)
6' minimum
(1.8m)
air
air
Typical humidifier control system should include along with the humidifier:

A wall or return duct humidistat

A high limit duct humidistat,

An air proving switch.
Placement of these devices is critical to proper operation of the overall system.

The return duct humidistat must always be located before any outside air intake, in order to ensure
accurate sensing of the air from the humidified space.

Alternatively a room humidistat can be used. The room humidistat should be located on an inside wall or
column. It should not be be near any discharge air from supply ducts or sources of heat or cold.

The airflow switch must be positioned to accurately open on a loss of air flow, to prevent the humidifier
from running when there is no air to absorb humidity.

The high limit humidistat must be positioned far enough - 6’ minimum (1.8m) - downstream of the steam
dispersion manifold(s) to prevent it from getting wet, but still allows it to accurately prevent
overhumidification of the duct that could result in condensation.
air
air
Return SHC80
Humidity sensor
Air flow switch
Steam dispersion
manifold
Or room HRO20
humidistat
High limit SHC80 for
VAV application only
High limit humidistat
(Illus. 38)
23
SK300 Humidifier
User Manual
9.
BACnet® interface set-up
9.1.
Locating BACnet interface PCB
The BACnet interface PCB is located on the top right
corner inside the electrical compartment.
BACnet interface PCB.
(Illus. 39)
9.2.
BACnet® port and interface Dip switches setting
O
1
N
23 4 5 6
O
N
1 2 3 4 5 6
DS1
TJ1
Not used
Baud rate selectio
DS2 switches at OFF position
(factory set-up)
JP2
Mode selection
1 2 3
Pull down disable
DS2
ON
120 Ohm termination
(last node) disable
JP3
Pull up disable
DS2 switches at ON position
DS2
DS2
1 2 3
ON
1 2 3
ON
Pull up enable
120 Ohm termination
(last node) enable
TB1
Pull down enable
A+ B-
Bacnet Port
(2 wires twisted pair)
(Illus. 40)
DS1-1 : Mode selection
OFF = Mode Operational (factory set-up)
ON = Mode Configuration
DS1-2&3 : Baud rate selection
Baud rate
Switch #2
Switch #3
9600
OFF
OFF
19200
ON
OFF
38400
OFF
ON
76800
ON
ON
(factory set-up)
24
SK300 Humidifier
User Manual
10.
Front panel display features
1
Alphanumeric Display:
Indicates all operation parameters and the error messages
(see section 14 – Trouble shooting).
Push button
2
1
2
3
3
4
4
5
6
5
7
8
6
7
(Illus. 41)
8




,
and
 button:
Used to access into program mode.
Up and Down button:
Used to increase or decrease the controlled
parameters of the humidifier.
''POWER'' indicator
The humidifier is powered by electricity and the switch is
O
at the AUTO position.
O
The humidifier is disconnected from the power supply.
"CHECK" indicator
The "CHECK" indication is normally off. It will go on as a
warning against abnormal conditions of operation. For
O
details consult the Alphanumeric Display
(see section 10.3 Alarm messages).
O Maintenance is required. The Running hours have
blinking
exceeded the Service hours. (see section 12 – Service).
O
No abnormal conditions of operation.
"FILL" indicator
O Indication that the water supply (fill) valve is open.
O
Indication that the water supply (fill) valve is closed.
"STEAM" indicator
ON/OFF model, the STEAM indicator lights when the
O
contactor is closed and steam is being generated.
Modulating model, the STEAM indicator blinks ON
and OFF in proportion to the percentage of steam
O output the humidifier is generating. (The proportion is
blinking
displayed on the alphanumeric display (1)). For 100%
the indicator will be lit with no blink.
O
There is no steam being produced.
Switch "AUTO/OFF/DRAIN"
Position AUTO (I):
AUTO Humidifier will generate steam based on demand from
the humidistat.
OFF
Position OFF (O):
Humidifier will shut off.
Position DRAIN:
Humidifier will stop operating and the evaporation
DRAIN
chamber will drain the water out. This will be done
tipically at regular service.
Indicator "DRAIN"
Drain pump is on, whether as a result of an automatic
O drain cycle or because the front panel switch is
manually set to DRAIN.
O
Drain pump is off.
25
SK300 Humidifier
User Manual
10.1.1.


''OFF'' Mode
When the rocker switch is in the ''OFF''
position, the display shows the model of the
unit and the program version number.
S KB 3 X X
N EP r 1 . 5
button on control panel,
By pushing the
you can access to the serial number of the
humidifier.
10.2.
(Illus. 42)
Scroll Mode
When the rocker switch is in the auto position, the display scrolls the following information every 6 seconds:
Display
Description
HUMIDITY
45.2%
D E MA ND
92%
OUTPUT
100%
WATR LVL
92%
WATR TMP
65C
10.3.
Comment
Percent of relative humidity
Only on modulating units (suffix M).
Percent of demand
Control signal input respand from
0-100%
Percent of output of the humidifier
Capacity output of the humidifier.
Water level in percent to the
objective
100% correspond to optimum water level
in evaporation chamber.
Water temperature in Celscius
Water
temperature
evaporation chamber.
inside
the
Alarm messages
When the following conditions occur, the alarms messages override the scrolling information:
Display
Description
Comment
AIR FLOW
OPEN
Air flow proof
The airflow is not detected by the air pressure switch
(modulating unit only).
HI LIMIT
CUT-OUT
Hi limit cut out
Humidity level has exceeded the set point on the high limit
humidistat.
D R A IN
CYCLE
Drain cycle
The unit is in the automatic drain mode
OVER
HEATED
Overheated
The temperature inside the container has exceeded the
boiling temperature. The humidifier has automatically shut off
Defected probe
The water level sensor is not operational. The humidifier has
automatically shut off
PROBE
DEFECTED
26
SK300 Humidifier
User Manual
Display
Description
Comment
No water
Water has not reached the level probe
CLEANING
REQUIRED
Cleaning required
The humidifier has reached the number of hours of operation
and requires cleaning of the evaporation chamber with no
interruption o fthe operation of the humidifier.
SERVICE
UNIT NOW
Service unit now
The humidifier has reached the number of hours of operation
and requires service. The operation of the humidifier is
interrupted.
F O A M IN G
CYCLE
Drain foam
AFEC (Anti Foam Energy Conservation) detects foam.
The unit drains for a few minutes and returns to normal
operation.
Drain or probe block
The unit drains but the water level does not decrease, the
humidifier has automatically shut off.
Klixon open
Temperature in the evaporation chamber exceeded the preset
temperature of the high temperature switch.
PCB FUSE
OPEN
PCB Fuse open
Internal 24vac is shorted.
24 VAC
SHORTED
24 VAC Shorted
External 24vac (for humidity) controller is shorted or over
loaded.
24 VDC
SHORTED
24 VDC Shorted
Internal 24vdc (probe or fan) is shorted.
R E FI L L
TIME OUT
Refill time out
Time to fill the evaporation chamber exceeded the preset time
in the microprocessor.
WATR TMP
DEFECTED
Water temperature
defected
The water temperature sensor is not present or defective.
SSR OVER
HEATED
SSR Overheated
The temperature of the SSR is too high. Verify the operation
of the cooling fan.
INTERLCK
OPEN
Interlock Open
Interlock safety is open. Humidifier is stopped.
End of season
When there is no humidity demand for a period of more than
72 hours, the humidifieir will drain the water from the
evaporation chambers automatically and will stay into a
stanby mode.
NO
LEVEL
D R N /P R O B
BLOCK
KLIXON
OPEN
END OF
SEASON
27
SK300 Humidifier
User Manual
10.4.
Programming mode
To enter into programming mode you just have to push the
button at any time, to advance the program function to
the next programming step in the menu push the same button twice.
Use the
Seq
#
01
and
buttons to choose from the proposed values or to change value.
Display
Description
Values
CONTROL
EXTERNAL
Selection of Control mode.
If External is selected, the control demand will be received
by the control input; if Com Port is selected, the control
demand will be received by the communication port (BACnet
option).
SP SOURC
INTERNAL
Selection of the Set Point Source (Control Internal only).
Selection of source for room humidity set point.
SETPOINT
40% RH
Selection of room relative humidity set point.
(SP Source Internal only)
Percentage
From 10 to 90%
DUCT SRC
DISABLE
Hi limit control mode.
Selection of the source for the duct high limit relative
humidity (Control Internal only).
Disable or External
or Com Port
Selection of high limit relative humidity set point.
(Duct Source External only).
Percentage
From 10 to 90%
Setting of automatic drain cycle of evaporation chamber.
From 1 to 24 hours
Increment: 1 hour
01A
Internal or External
or Com Port
Default: External
Internal or External
or Com Port
Default: Internal
01B
01C
Default: Disable
01D
DUCT SP
80% RH
02
DRAIN
8 HRS
Note: In general, harder the water is, more often the drain cycle
should be. Drain cycle setting does not affect the AFEC system.
Default: 4 hours.
03
Number of running hours reading and reset
RUNNING
0645HRS
To reset this counter: After service has been done, press
SERVICE
1000HRS
Hour span between services.
04
05
06
N/A
and
buttons for 30 seconds to reset
simultaneously the
the number of hours of operation to zero.
Note: In general, harder the water is, lower the number of hours of
operation before service should be.
LOCK ON
80% PWR
Selction of humidifier capacity reduction.
RESET
ALRM NO
Reset of alarm
i.e.: In this case, the humidifier will deliver 80% of its maximum
rated output when at full demand.
To reset an alarm, press simultaneously the
From 400 to 1500
hours.
Increment: 100
Default: 1000 hours.
From 00 to 100%.
Increment: 1%
Default: 100%
Yes or No
and
buttons.
Default: No
28
SK300 Humidifier
User Manual
07
08
CTRL INP
2-10 VDC
Control signal input selection.
HUM. INP
2-10 VDC
Humidity signal input selection.
Default : 2-10VDC
0-10VDC, 2-10VDC,
0-20mA or 4-20mA
Default : 2-10VDC
09
10
0-10VDC, 2-10VDC,
0-20mA or 4-20mA
DUCT INP
2-10 VDC
Duct Humidity signal input selection.
S KB 3 X X
N EP r 1 . 5
Revision level of the program installed
0-10VDC, 2-10VDC,
0-20mA or 4-20mA
Default : 2-10VDC
N/A
Note:
1. Any changes made in the Program Mode are saved into a non-volatile memory.
29
SK300 Humidifier
User Manual
10.5.
User Adjustment & Diagnostic menu
To enter to User adjustment & diagnostic menu: Press simultaneously
Seq
#
Display
Type
01
SSR TmP
40 C
Reading
02
WTR TOFF
100 C
User
adjustment
03
WTR FREQ
8000 Hz
Reading
04
WTR LOFF
100 %
User
adjustment
05
FOAM PRB
207
Reading
(menu) and
Description
SSR Temperature reading
Water temperature offset user adjustment
Water level frequency reading
Water level offset user adjustment
Foaming probe value reading
(down).
Value
N/A
Range: from -10˚C to +10˚C
Default: 0
N/A
Range: from -10% to +10%
Default: 0%
N/A
06
Drn Tm Out
5 min
User
adjustment
Drain time user adjustment
Range: from 4 to 16 min
Default:
SK302/304/306: 5 min.
SK310/314/320/330: 7 min
SK340/360: 8 min.
07
No Demnd
72 HRS
User
adjustment
Delay to drain out the humidifier from its
remains water when there is no demand, in
order to prevent bacteria growth
Range: from 1 to 250 Hrs
Default: 72Hrs
08
Hold Tmp
OFF
User
adjustment
Holding temperature of the evaporation
chamber for fast response to demand
Range: from 15 to 90˚C or OFF
Default: OFF
09
Anti-Frz
OFF
User
adjustment
Anti freezing temperature for the evaporation
chamber for humidifier to be installed in
weather proof enclosure.
Range: from 4 to 10˚C or OFF
Default: OFF
10
ALARM
Beep ON
User
adjustment
Alarm beep, to be selected ON or OFF
Range: ON or OFF
Default: OFF
11
T Unit
CELSIUS
User
adjustment
Temperature unit scale Celsius or Fahrenheit
Range: Celsius or
Fahrenheit
Default: Celsius
12
CONTRAST
25
User
adjustment
LCD Display contrast level
Range: from 0 to 40
Default: 25 (legible LCD)
13
SKB 3xx
NEP r1.5
Reading
Model of humidifier and revision number of
program installed.
N/A
30
SK300 Humidifier
User Manual
11.
Start up procedure
We recommend to strictly following this start-up procedure in order to avoid any anomaly resulting from wrong cleaning
of the components.
In case of problem or discrepancy see section 14 – Trouble shouting guide.
1. Make sure that mechanical, electric and plumbing connection are done and secured.
2. Make sure that low voltage control circuit is done and correct.
3. Turn on the water shut off valve (outside of the humidifier) and check that the drain connections are connected
to the main drain line of sufficient diameter.
4. Turn on the power to the humidifier from the circuit breaker disconnect. The POWER indicator should go on.
5. Press the front switch to the AUTO (I) position.
6. Perform a manual cleaning cycle.
a) The fill cycle is activated automatically when the evaporation chamber does not contain water.
b) When the FILL indicator is off, press the front switch to the DRAIN position.
c) The DRAIN indicator will come on and the water fill drain forom the evaporation chamber.
d) After 3 to 5 minutes when the evaporation chamber is empty, press the front switch to the AUTO position.
e) Repeat steps a to d one more time to ensure proper cleaning of the evaporation chamber.
7. Your humidifier is now fully operational. The SK300 humidifier will produce steam upon demand from control(s).
31
SK300 Humidifier
User Manual
12.
Service
12.1.




General
The humidifier is set to give service demand on the alphanumeric display and on the CHECK light after is
has reached the service hours setting (see section 10.4- Programming mode).
The routine service is a cleaning of the evaporation chamber.
We recommend setting the service demand depending on the water quality, the frequency of automatic
drain cycles and the demand placed on the humidifier.
The manual cleaning frequency can be from every 2 months to once a year.
12.2.
Evaporation chamber cleaning
WARNING: RISK OF BURN. THE EVAPORATION CHAMBER AND ITS CONTENT CAN BE EXTREMELY
HOT, CHECK TEMPERATURE BEFORE HANDLING.
1. Cool down evaporation chamber





Set the front panel switch ''AUTO/OFF/DRAIN'' to DRAIN. The humidifier will command a drain cycle.
Ensure that the evaporation chamber is completely empty. When it is empty, set the front panel switch
''AUTO/OFF/DRAIN'' to AUTO, the evaporation chamber will be fill with cool water; the FILL light will be illuminated.
As soon as the evaporation chamber is full of cool water, the FILL light will extinguish, Set the front panel switch
''AUTO/OFF/DRAIN'' to DRAIN again.
At the end of this drain cycle, check the temperature of the evaporation chamber, to do so, open the front door of
the humidifier and touch the evaporation chamber with the back of your hand, If it is cool enough you can go the
sequence #2 if not repeat the cool down operation until it will be cool enough.
Set the front panel switch ''AUTO/OFF/DRAIN'' to OFF
2. Shut down of the electrical supply
CAUTION: RISK OF ELECTRIC SHOCK. SHUT DOWN THE ELECTRIC SUPPLY OF THE HUMIDIFIER

Turn off the main power supply to the humidifier.
3. Disconnection of heating element(s)

Remove the high voltage connector located at the top right hand side of the mechanical compartment.
o Model SK302 to 306: Unscrew the connector.
o Model SK310 to SK360: squeeze the locking ears of the high voltage connector and pull it apart.
4. Disconnection of the other accessories.


Disconnect the connector from the water level sensor; this connector is attached to a cable that enters the
mechanical compartment just below the high voltage connector. Squeeze the locking ear of the connector and pull it
apart.
Remove the connection to the high limit sensor (klixon), located on the top cover of the evaporation chamber.
5. Disconnection of steam hose and water pipe


Remove the steam hose(s) at the top of the evaporation chamber.
Remove the water drain/fill connection to the evaporation chamber. To do this, unscrew the nipple located on the
lower right hand side of the evaporation chamber.
6. Removing the evaporation chamber



The evaporation chamber may now be freely removed from the humidifier cabinet.
CAUTION: The evaporation chamber still contains 1 inch of water, ensure that you do not reverse this water on
yourself.
Make sure that your footing is secure when lifting out the evaporation chamber. On large humidifier (SK340 and
SK360) it may weigh more than 35 lb (15 Kg). This operation may require another person to assist you in removing
the evaporation chamber.
7. Opening of the evaporation chamber


Remove the cover from the evaporation chamber.
o Model SK302 to 306: Unlatch the 3 latches located around the evaporation chamber, caution: these latches
are very tight, we recommend you to help you with a screwdriver or pliers to do this.
o Model SK310 to SK360: Turn the latches of the 4 or 8 latches located around the evaporation chamber.
Remove the cover from the evaporation chamber.
32
SK300 Humidifier
User Manual
8. Cleaning of the evaporation chamber




Pour out any remaining water and scale that is on the bottom of the container
To clean out the remaining scale from the container, use a stiff brush (synthetic filament only) and some vinegar or
any weak acid for cleaning stainless steel.
WARNING: The use of wire brush or any non-recommended acid will void the warranty.
If the amount of scale to remove is very important, the service demand frequency is too low for the quality of supply
water, you should then adjust this service demand frequency (see section 10.4 – Programming mode). Too much
scale may impair the normal operation of the humidifier or damage it; in this case warranty will be voided.
9. Cleaning of the other components



The components installed on the cover (heating element and water level sensor) and the cover itself should be
cleaned as necessary, only if some scale has been accumulated on them.
Proceed as per the cleaning of the container (step #8).
Removing and cleaning of the water level sensor.
A chamber protects the water level sensor. Cleaning of the sensor requires removing this chamber.
o Unscrew the 2 screws holding the chamber, located on the cover.
o Carefully remove the chamber, do not touch or damage the water level sensor.
o Clean out the water level sensor by using a clean soft cloth.
CAUTION: The water level sensor is covered by a thin lay of Teflon, any scratch or damage to this lay of Teflon
may provoke failure of the humidifier.
o Clean or the chamber by proceeding as per the main container (see step #8).
o Re-attach the clean chamber to the cover and screw in the 2 screws on the top of the cover.
P ro b e p ro te c to r
A d ju s te m e n t
p o te n tio m e te r
T e r m in a l
c o n n e c to r
Spacer
C o m p r e s s io n
fittin g
C over of
e v a p o r a tio n
cham ber
G a s k e ts
B ra s s w a s h e r
N u t (a )
T e flo n n u t ( b )
W a te r le v e l s e n s o r
cham ber
IM P O R T A N T :
A lw a y s k e e p th e
o p e n in g s c le a n , w a te r
m u s t flo w th r u .
(Illus. 43)
33
SK300 Humidifier
User Manual
10. Re assembly of the evaporation chamber







Rinse out the container and the cover with water.
Check the cover gasket, and make sure that the gasket is well placed before to re-install the cover on the container.
The water level sensor should be in front of the drain/fill connection of the evaporation chamber.
Tighten the latches around the cover (3,4 or 6).
Replace the evaporation chamber in the humidifier.
Tighten the water drain/fill connection nipple.
Replace the steam hose(s) on the outlet of the evaporation chamber.
Reconnect the connector of the water level sensor, high temperature switch (klixon) and the high voltage connector
of the heating element.
CAUTION: RISK OF FIRE. MAKE SURE THE HIGH VOLTAGE CONNECTOR IS PROPERLY LOCKED. AN
UNPROPER CONNECTION MAY PROVOKE ELECTRIC ARCS.
11. Start-up of the humidifier


Turn on the main power supply to the humidifier.
The POWER light of the front panel should be illuminated.

Press the
button to enter the programming mode, to reset the Running hours (see section 10.4-Programming
mode Step 3).
Set the front panel switch ''AUTO/OFF/DRAIN'' to AUTO. The humidifier will command to fill the evaporation
chamber with water; the FILL light should be illuminated.
It is possible that the CHECK light will illuminate because the evaporation chamber is empty. This signal will
extinguish as soon as the normal condition will be reach.
If there is a humidity demand, the humidifier will produce steam again.


34
SK300 Humidifier
User Manual
13.
Exploded view & Bill of Material
13.1.
Exploded view
S D U C a b in e t
P la s tic
g ril
W
S te a m T ra p A s s e m b ly
X
Y
U
V
T
AA
S
R
P
G
I
Q
N
J
O
H
J
I
G
B
B
F
F
D
L
E
E
D
C
C
M
K
Z
A
A
E v a p o ra tio n c h a m b e r b a s e
S K 3 1 0 to S K 3 6 0
E v a p o ra tio n c h a m b e r b a s e
S K 3 0 2 to S K 3 0 6
(Illus. 44)
35
SK300 Humidifier
User Manual
13.2.
Item
Bill of material
Description
Model
Part number
SK302 to 306
SK310 to SK330
SK340 & SK360
SK302 to 306 (1 phase)
SK304 to 306 (3 phases)
SK310 & SK314
SK320 & SK330
SK340
SK360
SK302 to 306
SK310 to SK330
SK340 & SK360
SW CONTSMA-ASSY
SW CONTMED-ASSY
SW CONTLAR-ASSY
SP 4018-M
SP 4019-M
SP 4183A
SP 4183B
SP 4186
SP 4185A
SP 1008
SP 1021
SP 1022
A
Container of evaporation chamber
B
Cover of evaporation chamber
C
Evaporation chamber gasket
D
Heater element
E
Level sensor chamber
SK302 to 306
SK310/314/320/340
SK330 & SK360
SP 4196-M
SP 4197-M
SP 4198-M
F
Washer (elements)
SK302 to SK360
SP 1005
G
S/S hex. Jam nut (elements)
SK302 to SK360
SP 2330
H
High temperature switch (klixon)
SK302 to SK360
SP 3035
SK302 to 306
SK310/314/320/340
SK330 to SK360
SK302 to 306
SK310/314/320/340
SK330 & SK360
SW FOAMSM-ASSY
SW FOAMMED-ASSY
SW FOAMLG-ASSY
SW SK300BPROBSMA
SW SK300BPROBMED
SW SK300BPROBMED
See table below
I
Foam sensor
J
Water level sensor
K
Water supply valve
SK302 to SK360
SP 6007
L
Fill and drain trap assembly
SK302 to 306
SK310 to SK330
SK340 & SK360
M
Silicone tubing ½”
Silicone tubing ¾”
PCV tubing ½”
SK302 to SK360
SW TRAPSMA-P
SW TRAPMED-P
SW TRAPLAR-P
SP 1023A
SP 1023B
SP 1027
N
Alphanumeric display
SK302 to SK360
NW SK300BDISPSS
O
''AUTO/OFF/DRAIN'' rocker switch
SK302 to SK360
SW SKSWITCH-ASSY
P
Terminal block and high voltage connectors
SK302 to SK360
/
Q
Cooling fan
SK302 to SK360
SP 3007
R
Transformer
See table below
S
Contactor
See table below
T
Solid State Relay
50 A
90 A
125 A
SP 3102
SP 3103
SP 3105
U
Main printed circuit board
SK302 to SK360
NW SK300BMAIN-TES
V
BACnet interface printed circuit board
SK302 to SK360
NW SK300BBACNETSS
W
SDU fan
SDU I
SDU II
SDU III
SW FANSDU1-RET
SW FANSDU2-RET
SP 3010
X
Transformer
Y
Fuse inside SDU
SDU I and SDU 2
SDU 3
SP 5105
SP 5106
Z
Drain pump
SK302 to SK360
SP G4101
See table below
36
SK300 Humidifier
User Manual
Model
Voltage
240V/1
SK302
208V/1
480V/1
600V/1
240V/1
208V/1
208V/3
SK304
480V/1
480V/3
600V/1
600V/3
240V/1
208V/1
208V/3
SK306
480V/1
480V/3
600V/1
600V/3
208V/3
SK310
480V/3
600V/3
208V/3
SK314
480V/3
600V/3
208V/3
SK320
480V/3
600V/3
SK330
480V/3
600V/3
208V/3
SK340
480V/3
600V/3
SK360
480V/3
600V/3
D
R
S
X
Heater element
Transformer
Contactor
SDU Transformer
SW 5932
SW 5933
SW 5934
SW 5935
SW 5937
SW 5940
SW 5924
SW 5941
SW 5923
SW 5942
SW 5925
SW 5938
SW 5943
SW 5933
SW 5944
SW 5934
SW 5945
SW 5935
SW 5959
SW 5958
SW 5957
SW 5946
SW 5947
SW 5948
*
SW 5950
SW 5951
SW 5952
SW 5939
*
SW 5950
SW 5951
SW 5952
SW 5939
SP 3310
SP 3308
SP 3321
SP 3341
SP 3310
SP3308
SP3308
SP 3321
SP 3321
SP 3341
SP 3341
SP 3310
SP3308
SP3308
SP 3321
SP 3321
SP 3341
SP 3341
SP 3308
SP 3321
SP 3341
SP 3308
SP 3321
SP 3341
*
SP 3321
SP 3341
SP 3321
SP 3341
*
SP 3321
SP 3341
SP 3321
SP 3341
SP 3029
SP 3029
SP 3029
SP 3029
SP 3029
SP 3029
SP 3080
SP 3029
SP 3080
SP 3029
SP 3080
SP 3100
SP 3220
SP 3080
SP 3029
SP 3080
SP 3029
SP 3080
SP 3220
SP 3080
SP 3080
SP 3027
SP 3080
SP 3080
*
SP 3100
SP 3080
SP 3027
SP 3220
*
SP 3220 (2x)
SP 3027
SP 3027 (2x)
SP 3220 (2x)
SP 3312
SP 3305
SP 3329
SP 3349
SP 3312
SP 3305
SP 3305
SP 3329
SP 3329
SP 3349
SP 3349
SP 3312
SP 3305
SP 3305
SP 3329
SP 3329
SP 3349
SP 3349
SP 3305
SP 3329
SP 3349
SP 3305
SP 3329
SP 3349
SP 3352
SP 3353
SP 3352
SP 3353
-
* Available, please consult factory.
37
SK300 Humidifier
User Manual
14.
Trouble shooting guide
Problem
Indicator
Display
Causes
Corrective actions
Power: Off
Humidifier does not
operate
(Power Off)
Blank display
 The humidifier is not
powered.
 Wires harnesses inside the
humidifier are not secured
properly.
 Check for the main power
supply and fuses.
 Check the transformer, the
low voltage fuse.
 Check the wires harnesses
and the Main pc board.
SKB 3XX
NEP r1.0
 The rocker switch is at the
OFF position.
 Wire harness from the LED
display panel to the Main
pc board is not secured
properly.
 Press the rocker switch to
the AUTO position.
 Check the white color wire
harness.
 Press the RESET button
on the Main pc board.
DEMAND
0%
 Modulating unit: no analog
signal.
 On/Off unit: no demand
from humidistat.
 Control wires are not
properly secured to the
terminal blocks.
 Verify the setting of the
humidistat.
 Verify the connections of
the wires to the control
terminal blocks.
AIR FLOW
OPEN
 Air flow is not detected by
air pressure switch.
 Control wires are not
properly secured to the
terminal blocks.
 Check the fan operation.
 Verify the wires to the
control terminal blocks #F
& 2.
HI LIMIT
CUT-OUT
 High limit humidistat is
open.
 Control wires are not
properly secured to the
terminal blocks.
 Check the operation of
the high limit humidistat.
 Verify the wires to the
control terminal blocks #F
& 1.
 Humidifier is filling with
water and has not reached
or is not reaching the
height of the water level
sensor.
 Humidifier is not filling with
water.
 Verify if the drain valve is
manually open.
 Check if the shut off valve
on the water supply line is
open.
 Verify the operation of the
fill valve.
 Check the fill valve
strainer and the external
strainer are not blocked.
Check: Off
Fill: Off
Steam: Off
Drain: Off
Power:Blink
Humidifier does not
operate
(Power On)
Check: Off
Fill: Off
Steam: Off
Drain: Off
Power: On
Check: Off
Humidifier does not
produce steam
(No Demand)
Fill: Off
Steam: Off
Drain: Off
Humidifier does not
produce steam
Humidifier does not
produce steam
Power: On
Check: Off
Fill: Off
Steam: Off
Drain: Off
Power: On
Check: On
Fill: Off
Steam: Off
Drain: Off
Power: On
No water inside the
evaporation chamber
Or
Humidifier will not
stop draining
Check: On
Fill: On
Steam: Off
Drain: Off
NO
LEVEL
38
SK300 Humidifier
User Manual
Problem
Indicator
Display
Causes
 Excessive foaming
condition inside the
evaporation chamber.
 Foaming sensor is
grounded.
 Verify the quality of the
supply water.
 Verify if chemical products
were used to clean the
evaporation chamber
during maintenance.
Rinse with water the
chamber properly.
 Check the setting of the
Drain cycle. Reduce the
time between Drain
cycles.
 The Running hours have
exceeded the Service
hours.
 Service the evaporation
chamber, see section 12.
 Reset the Running hours
to cancel the blinking of
the CHECK light, see
section 10.4 STEP 3.
 The electronic temperature
sensor inside the water
level sensor has sensed
abnormal temperature.
 Verify if the humidifier
was operating below the
standard water level.
Replace item J if
necessary.
PROBE
DEFECTED
 The water level sensor is
damaged.
 Replace the water level
sensor, item J.
DRN/PROB
BLOCK
 During a Drain or Foaming
cycle, the water level
sensor has sensed the
water level has not
decreased.
 Verify the drain valve, the
fill and drain water pipe
connection, the water
level sensor chamber are
not obstructed.
 Reset the Alarm see
section 10.4 step #6
KLIXON
OPEN
 The high temperature
switch has sensed
abnormal temperature
 Verify if the humidifier was
operating below the
standard water level.
Replace item J if
necessary.
 Press the manual reset to
close the klixon.
P C B FU S E
OPEN
The internal 24vac of the
humidifier was shorted.
 Verify the internal wirings
and connections.
 Replace the fuse.
Power: On
Check: On
Humidifier is always
on Foam cycle
Fill: On
FOAMING
CYCLE
Steam: Off
Drain: On
Power: On
Humidfier is
operating and the
CHECK light is
blinking
Check:Blink
Fill: Off
Steam: On
CLEANING
REQUIRED
Drain: Off
Power: On
Humidifier is not
operating and the
CHECK light is ON
Humidifier is not
operating and the
CHECK light is ON
Check: On
Fill: Off
Steam: Off
Drain: Off
Power: On
Check: On
Fill: Off
Steam: Off
Drain: Off
OVER
HEATED
Power: On
Humidifier will not
drain and the
CHECK light is ON
Check: On
Fill: Off
Steam: Off
Drain: Off
Power: On
Humidifier does not
operate and the
CHECK light is ON
Check: On
Fill: Off
Steam: Off
Drain: Off
Humidifier does not
operate and the
CHECK light is ON
Power: On
Check: On
Fill: Off
Steam: Off
Drain: Off
Corrective actions
39
SK300 Humidifier
User Manual
Problem
Humidifier is not
operating and the
CHECK light is ON
Humidifier is not
operating and the
CHECK light is ON
Indicator
Power: On
Check: On
Fill: Off
Steam: Off
Drain: Off
Power: On
Check:On
Fill: Off
Steam: Off
Drain: Off
Display
Causes
24 VAC
SHORTED
 External 24vac provided to
the humidifier is shorted.
 Check the external
wirings.
24 VDC
SHORTED
 The water level sensor or
the cooling fan is shorted.
 Verify the connection of
these two items. Replace
the water level sensor,
item J or the cooling fan,
item Q if necessary.
R E FI L L
TIME OUT
 Time elapse between two
refill is too long when
humidifier is producing
steam.
 Verify the water level
sensor and water level
chamber and clean if
necessary.
 Reset the Alarm see
section 10.4 step #6
 Water temperature is
defective.
 Verify the connection the
water level sensor.
Replace the water level
sensor, item J if
necessary.
SSR OVER
HEATED
 The temperature on the
SSR is too high.
 .Verify the cooling fan is
operational or if the air
vents are free of dirts.
Replace the cooling fan,
item Q if necessary.
INTERLCK
OPEN
 The interlock contact is
open.
Power: On
Humidifier is not
operating and the
CHECK light is ON
Humidifier is not
operating and the
CHECK light is ON
Humidifier is not
operating and the
CHECK light is ON
Humidifier does not
produce steam
Check: On
Fill: Off
Steam: Off
Drain: Off
Power: On
Check: On
Fill: Off
Steam: Off
Drain: Off
Power: On
Check: On
Fill: Off
Steam: Off
Drain: Off
Power: On
Check: Off
Fill: Off
Steam: Off
Drain: Off
WATR TMP
DEFECTED
Corrective actions
 Check the interlock
switch.
 Verify the wires to the
control terminal blocks #F
& 5.
40
SK300 Humidifier
General conditions of sale & warranty
1. General
Unless otherwise arranged, in writing, the acceptance of the
Order Confirmation by the purchaser includes acceptance of the
"General Conditions of Sale and Warranty" of National
Environmental Products, Ltd hereafter referred to as NEP.
10. Return of good


2. Incoterms
The international rules for interpretation of trade terms
"Incoterms" as defined by the ICC Incoterms publication no. 460
from 1990, shall apply to the commercial terms used herein.
3. Confirmation of Order


NEP shall not be deemed to have accepted an order until
written "Order Confirmation" from NEP is issued to the
purchaser.
It is the responsibility of the purchaser to verify that all
information concerning his/her order is correct and to notify
NEP In writing, of any discrepancy prior to the order being
shipped. In the event of a change or correction to an existing
order, a second "Order Confirmation" will be issued by NEP.


4. Price




Our prices are net, Ex-works Montreal in U.S. Currency, unless
stated otherwise.
Minimum orders shall be $50.00 minimum.
Shipping and Handling charges are $5.00 minimum per order
unless the shipment is billed to the purchaser's account or
shipped freight collect.
NEP reserves the right to adjust accepted prices in the event of
alterations in rates of exchange, variations in costs of materials,
changes in wages, interference on the part of the Government
or similar conditions over which NEP has no control.
5. Payments terms




Major credit cards, C.O.D., Prepayment.
For open account, invoices are payable within 30 days from the
date of invoice without no deduction, unless specify otherwise.
An interest charge of 2% per month will be included on all
overdue payments.
No new order will be process if invoices are not paid within 45
days.

11. Warranty



6. Transfer of ownership
The goods shall remain the property of NEP until the full
payment for the goods has been received by NEP.
7. Delivery terms




Shipments are Ex-works 400 Lebeau, St Laurent, Quebec,
H4N 1R6, CANADA unless notified otherwise.
Unless special instructions, the order will be delivery in the way
which NEP deems best without guaranteeing this to be the
cheapest way of transport.
For International Order, a written designation naming the
freight forwarding agent is required and will remain in effect
until notified otherwise.
Any discrepancy, damage or breakage should be reported in
writing both to NEP and to the Carrier within 5 working days
from the receipt date.





8. Risk
From the moment of delivery, the purchaser shall bear all risks
for the goods and NEP shall not be responsible for loss and
damage incurred during transportation.

9. Delivery time


Delivery time is stated approximately and depends on the
product ordered, please allow a minimum of:
a) 2 weeks for processing North American order.
b) 6 weeks for processing International order.
We will make every effort to adhere to our delivery promises,
but will not accept order or contract cancellation or any liability
for any direct or indirect losses that may arise for any reason
whatsoever as a result of our failure to adhere to such
promises.
Goods received by the purchaser cannot be returned unless
a completed "R.M.A. Form" (Return Material Authorization
Form) has been issued by NEP's Customer Service.
Any returned goods must be sent to NEP 400 Lebeau, St
Laurent, Quebec, H4N 1R6, CANADA, unless stated
otherwise by the R.M.A. Form, accompanied with the
completed "R.M.A. Form", the R.M.A. number shall be
prominently displayed on the shipping box. Unauthorized
returns will be refused.
Any returned goods must be sent freight prepaid. Any goods
that come to us freight collect will be refused and returned to
sender unless previously agreed to by us in writing on the
"R.M.A. Form".
Goods returned for credit shall be in condition for resale in the
original box and properly packaged. Units, accessories or
components that have been installed are not returnable and
not refundable.
Credit is subject to an overhead charge of 30% of the invoice
plus shipping & handling if returned within 30 days of the
invoice date and 50% from 30 to 60 days.
Non standard product (SK units with special feature),
Multisteam manifolds and any DI unit are not returnable and
not refundable.

Provided that the terms of payment are observed, the
purchaser is offered a warranty of 24 months from the
original purchase date of delivery for any NEP's standard
product, provided the equipment has been properly installed
and operated in accordance with NEP instructions.
The warranty covers faulty manufacture, design and/or
defective materials and is limited to the equipment and
components. The warranty shall cease to be valid in the
event of misapplication, incorrect installation, improper
maintenance or any other incorrect uses or misuse of the
product.
For the SK series, the warranty furthermore ceases to be
valid if the user disconnects or removes any electronic or
mechanical components prior disconnecting the input power.
NEP assumes no responsibility for repairs made on
equipment, unless performed by NEP's authorized personnel.
The defective product or component shall be returned in
accordance with the paragraph 10 (Returns of goods) as
described in this document.
NEP agrees under the warranty to repair or replace (at the
discretion of NEP) such standard product or component,
which upon examination by NEP are found to be defective.
Product or component replaced or repaired under warranty
will be sent back to the purchaser, standard freight paid by
NEP
Expenses in connection with travelling time, dismantling and
mounting shall not be paid by NEP
Guarantee for products or components sold but not
manufactured by NEP, is only given to the same extent as
given to NEP, however, not exceeding the normal NEP
warranty.
Parts used for repairs are warranted for the balance of the
term of the warranty on the original humidifier or 90 days,
whichever is longer.
Any repair made, after the original warranty period, at the
NEP facilities are warranted for 1 month from the date of
repair.
12. Proper law and jurisdiction
This contract is and shall be deemed to have been made in the
province of Quebec, CANADA, and shall in all respects, be
governed by the province of Quebec laws.
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