Neptronic SK300-XL Series User manual

Electric Steam Humidifier
SK300-XL Series
INSTALLATION INSTRUCTIONS
Read and save these instructions
SK300-XL-IOM – Rev.: 131125

SK300-XL Steam Humidifier
1
Safety
ELECTRICITY
All work concerned with electrical installation MUST only be performed by skilled and
qualified technical personnel (e.g. electrician or technician with appropriate training).
The customer is always responsible for ensuring the suitability of the technical
personnel.
Please observe the local regulations concerning the provision of electrical
installations.
HEALTH &
SAFETY
NEP has considered aspects of the design of their humidification systems to reduce
as far as possible the risk of Legionnaires’ disease and other similar conditions but it
is important that users are also aware of their responsibilities.
To prevent the growth of Legionella, users are required to:
Avoid water temperature that favors the growth of Legionella (20-45˚C [68 to
113˚F]).
Avoid water stagnation.
Clean and disinfect the humidification system.
Have a competent person carry out a risk assessment of the water system
supplying the humidifier to ensure the water supply is of an acceptable
quality
CORRECT USE Neptronic® systems and products are designed only for humidification use.
Any other application is not considered use for the intended purpose. The
manufacturer cannot be made liable for any damage resulting from incorrect use.
ACCESS NEVER LEAVE SK300-XL CABINET KEYS IN THE DOORS AS UNAUTHORIZED
ACCESS TO LIVE ELECTRICAL PARTS MAY BE GAINED – ALWAYS STORE
KEYS CENTRALLY WITH NOMINATED RESPONSIBLE PERSON.
WATER Neptronic® systems are designed to be used with mains, reverse osmosis,
demineralized or partially softened water. On no account attempt to introduce any
other fluid or chemical into the system without first consulting NEP or its authorized
distributor.
Water supply must not exceed the max pressure of 70 psig (480 kPa), or pressure
limits laid out in the Specification and Installation Instructions, and should comply
with local regulations.

SK300-XL Steam Humidifier
2
Foreword
Foreword
This installation and operation manual has been developed to facilitate the
installation and the operation of the SK300-XL series electric steam humidifier. The
strict application of these instructions will ensure the conformity of the installation
and operation to the manufacturer's recommendations.
The application of these instructions is one of the conditions of the warranty.
The application of these instructions does not ensure at any time conformity with the
rules in force of the country of destination.
This product has been declared to conform to applicable Canadian and American
standards and bear the CSA c&us marking.
Copyright ©2013: 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 National Environmental Products Ltd.
Manufacturer
Presentation
National Environmental Products Ltd (NEP) is the owner of the Neptronic® brand
NEP develops, manufactures and services a complete line of:
Electric Steam humidifiers for Residential application,
Gas fired Steam humidifiers for Commercial application,
Steam to Steam and Direct Injection Steam humidifiers for Commercial
application,
Actuators to regulate air dampers or valves,
Electric heaters,
Humidistats, 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 25 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 Anti
Foaming Electronic Controller (AFEC).
Manufacturing is conducted on the premises of our modern 7 000m2(80,000 sq.ft)
facility in Montreal, Canada.
Our quality system is built on the ISO 9001 model.
Our vision ''Customer for Life'' is realized by listening to customer needs and by
supplying products, which exceed expectations in quality, functionality and durability.
National Environmental Products Ltd.
Toll free in North America: 1 800 361-2308
Tel.: (1) [phone]
Fax: (1) [phone]
Customer service Fax: [phone]
Business hours: from Monday to Friday, 8:00am to 5:00pm (Eastern time)

SK300-XL Steam Humidifier
3
Table of content
Safety....................................................................................................................................................1
Foreword...............................................................................................................................................2
Table of content...................................................................................................................................3
Technical Specifications.....................................................................................................................4
Dimensions & Weights........................................................................................................................5
Installation Overview...........................................................................................................................7
Stage 1 – Unit Positioning and Mounting..........................................................................................8
Stage 2 – Steam Distribution Installation ..........................................................................................9
Stage 3 – Water Supply Installation .................................................................................................12
Stage 4 – Water Drain Connection ...................................................................................................13
Stage 6 –Electrical Control Connections.........................................................................................15
Humidity signal set-up ......................................................................................................................19
Initial verification & Start up .............................................................................................................21
Commissioning – Operation description.........................................................................................22
Operation display...............................................................................................................................23
List of alarms......................................................................................................................................24
Programming mode...........................................................................................................................25
Wiring diagram...................................................................................................................................27
General conditions of sales & warranty ..........................................................................................28

SK300-XL Steam Humidifier
4
Technical Specifications
3D opened view
(Fig.1)
Model Steam cap. (lb/h)
[kg/h]
Power
(kW)
Current (A) Nb of
outlets
Multi-Steam
header diam.
(in) [mm]
208V /
3ph 480V / 3ph 600V / 3ph
SK330M 90
[41] 30 83.4 see standard SK300 IOM 1 3’’ [76]
SK340M 120
[56] 40 111.0 see standard SK300 IOM 1 3’’ [76]
SK370M 210
[95] 70 n/a 84 70 1 3’’ [76]
SK380M 240
[108] 80 n/a 96 81 2 3’’ [76]
SK390M 270
[122] 90 n/a 109 91 2 3’’ [76]
Notes: Maximum static duct pressure is 5” w.c. (1.25 kPa). For higher static duct pressures please consult NEP or its
authorized distributor.

SK300-XL Steam Humidifier
5
Dimensions & Weights
Front view
(Fig. 2)
Back view
(Fig. 3)
General Dimension & Weight
Model Dimensions in inches [mm] Weight in lb [kg]
A B C
Empty Full of
water
SK330M
SK340M
SK370M
SK380M
SK390M
48.1
[1221] 33 [838] 25 [635] 320 [145] 444 [200]
Water Inlet, Steam and main Drain outlets Dimensions
Model No of Steam
Outlets
Dimensions in inches [mm]
Steam
Outlet
Diam. D E
Drain
Outlet
Diam
Water
Inlet
Diam F G
SK330M
SK340M
SK370M 1 Ø3”
[76] 18.2 [462] n/a Ø3/4” [20] ؽ” NPT 15.1 [383] 7.5 [190]
SK380M
SK390M 2 Ø3”
[76] 18.2 [462] 9 [230] Ø3/4” [20] ؽ” NPT 15.1 [383] 7.5 [190]
Note: Drain outlet and water supply inlet are located on the right hand side of the humidifier. Left hand side location of any of
is available upon request.
Electrical inlets and Pan drain outlet Dimensions
Model Dimensions in inches [mm]
Electrical
KO Diam. H I J
Pan Drain
Outlet Diam. K L
SK330M
SK340M
SK370M
SK380M
SK390M
Ø7/8 & 1-3/8’’
[22 & 35] 26.4 [670] 22.4 [569] 2.2 [55] Ø1/2’’ [13] 19.2 [488] 1.0 [25]
A
B
CD
E
F
G
K
L
HI
J
Power
supply inlet
Electrical
controls
inlet

SK300-XL Steam Humidifier
6
Handling & Unpacking
Lifting or handling MUST only be carried out by trained and qualified personnel. Ensure
that the lifting operation has been properly planned, risk assessed and that all
equipment has been checked by a skilled and competent Health & Safety
representative and effective control measures put in place.
It is the customer’s responsibility to ensure that operators are trained in handling heavy
goods and to enforce the relevant lifting regulations.
Refer to Dimensions & Weight section for system dry weights.
Handling and
Lifting The SK300-XL Steam Humidifier MUST always be handled and lifted with care and
should remain in its original packaging for as long as possible prior to installation
The SK300-XL Steam Humidifier package may be carried using a forklift from the
underside. Caution should be exercised to ensure balanced load before lifting.
Lifting sling angle should be greater than 30˚to the horizontal.
Unpacking SK300-XL Steam Humidifier is shipped on a wooden crate.
Remove packing wooden crate and skids prior to installation.
List of
accessories
supplied
Standard enclosure
2 sets of keys.
2 adjustable steam hose collars per
steam outlet.
The present Installation Instructions.
Wiring diagram affixed onto the interior of the electrical compartment door.
!

SK300-XL Steam Humidifier
7
Installation Overview
All installation work must comply with local regulations.
All work related to the installation of the SK300-XL Steam Humidifier MUST
only be performed by skilled and qualified technical personnel (e.g. qualified
gas installer, fitters, electricians, plumbers or technicians with appropriate
training).
The customer is responsible for ensuring their suitability.
For the installation of the SK300-XL Steam Humidifier and associated
components there should be no special tooling requirements above that of a
fitter’s toolkit.
Installation method
statement
Stage1: Unit Positioning and Mounting
Stage 2: Steam Distribution Installation
Stage 3: Water Supply Installation
Stage 4: Water Drain Connection
Stage 5: Electrical Supply and Installation
Stage 6: Electrical Control Connections
(Fig. 4)
!
Stage 5
Stage 2
Stage 1 Water
supply
Stage 4
Stage 3
Stage 6
SK300-XL

SK300-XL Steam Humidifier
8
Stage 1 – Unit Positioning and Mounting
General
considerations
Any installation work MUST be carried out by suitably qualified personnel.
The following considerations should be taken into account before deciding on the
location for the SK300-XL Steam Humidifier:
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.
Location area should be well ventilated, ambient temperature should not
exceed 86˚F (30˚C).
Positioning the
Humidifier
The humidifier must be installed to ensure the steam hose length is kept to the
shortest possible length.
For flexible steam hose: the total steam line length should not exceed 16
feet (5 meters). For longer distances use insulated hard piping.
For insulated hard piping: the total steam line length should not exceed 50
feet (15 m). For longer steam line runs, consult factory.
Observe the minimum access distances as shown in figure 5.
(Fig. 5) Standard enclosure
dimensions in bracket are in mm
Minimum
Clearances
Minimum clearances are :
Top: 20’’(510mm) minimum
Electrical panel side: 24’’ (600mm) minimum
Front: 30’’ (800mm) minimum
The humidifier is designed to be installed directly on the floor.
Provide a level, solid foundation for the humidifier.
Ensure that the floor beneath the humidifier is water proof to withstand any water
spillage during servicing or if a problem occurs.
The humidifier is provided with adjustable legs in order to ensure proper level.
!
30'’[800]
minimum
20'’ [510]
minimum
24'’[600]
minimum

SK300-XL Steam Humidifier
9
Stage 2 – Steam Distribution Installation
Fundamental Design
Concepts
1. Maximum steam velocity in a pipe should not exceed 40 feet/sec
(12m/s) velocity. Velocities above this will generate noise.
2. Minimum steam pipe gradient should be 7˚i.e. 5’’ (125mm) rise in 40’’
(1m) run.
3. The lowest point of any steam hose or rigid pipe must be the humidifier.
A steam separator (S trap) should be installed higher than the static
pressure of the system by at least 2’’ (50mm).
4. Total length of the flexible steam hose should not exceed 16 feet (5 m)
or insulated rigid piping should not exceed 50 feet (15 m).
5. Whenever possible use rigid copper piping, flexible steam hose can be
used for short runs or for interconnecting between rigid pipe runs, ensure
that there is no kink in the flexible hose.
When using rigid copper pipe, insulation should be used to diminish
condensation build up.
(Fig. 6)
dimensions in bracket are in mm
(Fig. 7)
dimensions in bracket are in mm
(Fig. 8)
6. Connection pipe sizes between SK300-XL and steam distributor in the
duct should be 4 ¼’’ (108mm) up to 528lb/h (240kg/h)
7. All Humidifiers above 220lb/h (100kg/h) capacity should use Multi-
Steam.
!
Min. 7°
Correct Installation
SK300-XL humidifier
with Multisteam.
Static pressure
+ 2'’ (50)
Min. 7°
Correct Installation
SK300-XL humidifier with 2 SAMB E2 manifolds
Static pressure
+ 2'’ (50)
Incorrect Installation

SK300-XL Steam Humidifier
10
Stage 2 – Steam Distribution Installation
Selection of
Multi-Steam 1. For all Multi-Steam units use the Neptronic® Humidisoft program to size the
unit.
2. Where two Multi-Steam units are required, duties in excess of 528lb/h (240kg/h)
make your selection using the following rules:
Divide the air volume flow in half.
Divide the AHU / air Duct width in half.
Height of the duct must remain at 100% its height.
This will size Multi-Steam units so that they can be placed side by side.
3. For installation of Multi-Steam units please refer to Neptronic® Multi-Steam
Installation Instructions
Horizontal duct (Fig. 9)
dimensions in bracket are in mm
Vertical duct (Fig. 10)
dimensions in bracket are in mm
ؽ'’ (15) Static pressure
+ 2'’ (50)
Min. 50 mm
Min. 2'’ (50)
Min. 2'’ (50)
Mounting bracket must be level horizontally
Steam supply hose or
rigid pipe to Humidifier
Header must be pitched toward condensate drain
Condensate drain pipe to steam trap
Air duct
Rod, bolt, nut and
washer assembly
Static pressure
+ 2'’ (50)
Min. 10º
Steam supply hose or
rigid pipe to Humidifier
Header must be pitched toward condensate drain
Air duct Rod, bolt, nut and
washer assembly
Air flow
Air flow

SK300-XL Steam Humidifier
11
Stage 2 – Steam Distribution Installation
Steam pipe work to Duct connections
SK330M
SK340M
SK370M
(Fig. 11)
dimensions in bracket are in mm
A single Ø3’’ (76mm) feed pipe should be connected to a single Multi-Steam with a
suitable reduction at the lowest point to allow a ؽ’’ (15mm) condensate drain from the
main steam supply.
SK380M
SK390M
(Fig. 12)
dimensions in bracket are in mm
Two Ø3’’ (76mm) steam outlets to a single Ø5’’ (130mm) feed pipe should be connected
to a single Multi-Steam with a suitable reduction at the lowest point to allow a ؽ’’
(15mm) condensate drain from the main steam supply.
Ø3'’ (76)
ؽ'’ (15)
Min. 7° pipe slope
Min. 4'’ (100)
Insulated pipe
H
Air Duct
Static pressure
+ 2'’ (50)
Min. 2/5 H
min7°pipeslope
Ø3'’
(76)
Ø5'’ (130)
Ø2'’ (15)
Min. 7° pipe slope
Static pressure
+ 2'’ (50)
Insulated pipe
Air Duct
Ø3'’
(76)

SK300-XL Steam Humidifier
12
Stage 3 – Water Supply Installation
Water supply installation should conform to local codes and regulations.
Any installation work must be carried out by suitably qualified personnel.
Water inlet
Specifications Neptronic® SK300-XL Humidifier is designed to be used with mains, reverse
osmosis, de-ionized and de-mineralized water.
Maximum water supply pressure: 10 to 70psig (70 to 480kPa)
Minimum water temperature: 49˚F (+4˚C)
Maximum water temperature: 104˚F (+40˚C)
Model Waer inlet
Connection siz
e
SK330M
SK340M
SK370M
SK380M
SK390M
1/2’’ NPT
Male
Water supply line
Installation To facilitate servicing, a shut off valve (not supplied) should be installed in the water
line, within 40’’ (1m) of the humidifier.
(Fig. 13)
!
SK300-XL
Water Inlet connection
¼ turn Shut off Valve
4 ¾’’
(120)
Flexible Hose
Feed Water supply line
Gasket Gasket

SK300-XL Steam Humidifier
13
Stage 4 – Water Drain Connection
Water Drain installation should conform to local codes and regulations.
Any installation work must be carried out by suitably qualified personnel.
Water Drain
Specification Water Drain temperature: 140˚F (+60˚C)
Model Water Drain Outlet
Connection size
Pan Drain Outlet
Connection size
SK330M
SK340M
SK370M
SK380M
SK390M
3/4’’
(20mm) 1/2’’ (15mm)
Water Drain
Installation Water drain outlet connection should be connected to drain pipe of sufficient size.
We recommend the use of standard copper hydraulic pipes.
Minimum water drain pipe gradient should be ¼’’ (1.5mm) in 40’’ (1m) horizontal run.
No drain trap is required.
(Fig. 14)
!
SK300-XL
4 ¾’’ (120)
Ø 1½'’ (38)
minimum
Ø 3/4’’ (20mm)

SK300-XL Steam Humidifier
14
Stage 5 –Electrical Supply and Installation
Electrical Power
Supply The SK300-XL Steam Humidifier requires a 120, 208 or 240V single phase supply.
Model Voltage (V) Current (A)
SK330M 208 – 3ph 84
SK340M 208 – 3ph 111
SK370M 480 – 3ph 84
600 – 3ph 70
SK380M 480 – 3ph 96
600 – 3ph 81
SK390M 480 – 3ph 109
600 – 3ph 91
All incoming power supplies MUST be externally fused for over current protection.
The electrical supply should also be isolated for the purpose of emergency and
servicing. A disconnect switch should typically be installed within one meter of the
humidifier.
The isolator must have a contact separation of at least 1/8’’ (3mm).
Electrical
connection
All work related to electrical installation MUST only be performed by skilled and
qualified technical personnel (e.g. electrician or technicians with appropriate
training).
Please observe local codes and regulations concerning the provision of electrical
installations.
WARNING. Risk of electric Shock. Ensure that the electrical supply is
isolated before beginning any installation.
WARNING: RISK OF FIRE. Do not interchanges the power terminal block
designated L1, L2 and L3 with Low voltage terminal block designated 1, 2 and 3.
The installation engineer must ensure the following:
Use of copper power conductor only.
Size of the power conductors are suitable for the maximum current supplied.
Incoming power cable is secured via suitably sized cable gland.
Each terminal connection is secured firmly with a cable ferrule.
The ground conductor should be equipped with ring terminal and should be
connected directly to the electrical panel on the indicated location.
Humidifier cabinet has an uninterrupted or unbroken electrical ground.
(Fig. 15)
!
L1
L3
L2
Electrical panel SK300-XL

SK300-XL Steam Humidifier
15
Stage 6 –Electrical Control Connections
Humidifier
Interlocks Neptronic® SK300-XL Steam Humidifier has one interlock entry:
(Fig. 16)
High level humidistat contact should be wired in series with P.D. Switch contact
and humidistat signal between terminals TB1 & 2
In case of opening of any on this contact. Operation of humidifier will stop and Alarm
message will be displayed.
Humidifier
Control with
humidity
controller
Neptronic® SK300-XL modulating Steam Humidifier can be installed in conjunction
with Neptronic® HRO and SHC humidity controller.
(Fig. 17)
5 Vdc
Low voltage control terminal block
High limit humidistat
Differential pressure switch
5 Vdc
1
2
2
1
3
4
5
Fuse
humidistat
24 VAC
Pressure Differential
switch
High limit
1 432F
8769
Control terminal
block wiring
HRO20
16
14 15 13
MOD
%RH
COM
SK300

SK300-XL Steam Humidifier
16
Stage 6 –Electrical Control Connections
Humidifier
Control with
humidity
controller and
room or duct
sensor
Neptronic® SK300-XL Steam Humidifier can be controlled with Neptronic® HRO20
or HRO20 + SHR10 or SHC80 humidity sensors.
(Fig. 18)
Humidifier
Control with
humidity sensors
Neptronic® SK300-XL Steam Humidifier can be installed in conjunction with
Neptronic® SHR10 or SHC80 humidity sensors.
(Fig. 18)
humidistat
High limit
1 432F
8769
Control terminal
block wiring
HRO20
SK300
24 VAC
16
14 15
1312
MOD
%RH
COM
Pressure Differential
switch
+SHR10
or
SHC80
24 VAC
3
%RH
COM
%RH input
1
875
432F
69
1
3
2
COMMON
0-10 VDC OUTPUT
24 VAC OR VDC
SHR10
or
SHC80
SK300 Humidifier
To Term. #3
To Term. #F
To Term. #6

SK300-XL Steam Humidifier
17
Stage 6 –Electrical Control Connections
VAV System Neptronic® SK300-XL modulating Steam Humidifier can be installed in conjunction
with a VAV system, in this case Neptronic® SHC Duct humidity sensor will act as a
Hi level Duct Humidity sensor. Humidity will be controlled by Neptronic® SHR or
SHC Room or Duct humidity controller.
(Fig. 19)
Dry Contacts 2 volt free contacts are provided :
Operation (fan) contacts:
One normally connected to common and one normally open contact
These contacts should be used to switch a low voltage control, up to 24Vac or Vdc,
with a switching current of no more than 3 A.
(Fig. 20)
1
875
432F
69
SK300 Humidifier
To Term. #3
To Term. #F
To Term. #4
1
3
2
COMMON
0-10 VDC OUTPUT
24 VAC OR VDC
SHC80
1
3
2
COMMON
0-10 VDC OUTPUT
24 VAC OR VDC
SHR10
or
SHC80
To Term. #F
To Term. #3
To Term. #6
Note: when SHC80 is used as Hi limit
Duct sensor, control signal jumper
should be placed on 0-10 Vdc on
Modulating PCB (see section 8.2.4 of
installation instructions)
1
875
432F
69
Common
Normally Open
Normally Closed

SK300-XL Steam Humidifier
18
Stage 6 –Electrical Control Connections
Controls
placement
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 over humidification of the duct that could
result in condensation.
(Fig. 19)
Return SHC80
Humidity sensor
air
air
airair
Or room HRO20
humidistat
High limit humidistat
High limit SHC80 for
VAV application only
6' minimum
(1.8m)
Air flow switch Steam dispersion
manifold

SK300-XL Steam Humidifier
19
Humidity signal set-up
Terminal Block Modulating Printed Circuit Board
Humidity signal 0-10 Vdc
(Illus. 37)
(Illus. 40)
Humidity signal 2-10 Vdc
(Illus. 38)
(Illus. 41)
Humidity signal 4-20 mA
(Illus. 39)
(Illus. 42)
1
875
432F
69 0-10 Vcc
+
-
Pressure Differential
Switch
High limit
Humidistat
5 Vdc
PCB970819 REV. C
Jumper on
0-10V
Extra jumper
TOP PCB
MODULATING
CONTROL
INPUT
HUMIDITY
INPUT
4-20mA
0-10V
2-10V
4-20mA
2-10V
0-10V
1
875
432F
69 2-10 Vcc
+
-
Pressure Differential
Switch
High limit
Humidistat
5 Vdc
PCB970819 REV. C
Jumper on
2-10V
Extra jumper
TOP PCB
MODULATING
CONTROL
INPUT
HUMIDITY
INPUT
4-20mA
0-10V
2-10V
4-20mA
2-10V
0-10V
1
875
432F
69 4-20 mA
+
-
Pressure Differential
Switch
High limit
Humidistat
5 Vdc
Jumpers on
4-20mA & 2-10V
PCB970819 REV. C
TOP PCB
MODULATING
CONTROL
INPUT
HUMIDITY
INPUT
4-20mA
0-10V
2-10V
4-20mA
2-10V
0-10V