Neptronic SK300 series User manual

national environmental products, ltd.
400 blvd. lebeau, st. laurent, quebec, canada H4N-1R6
tel.:[phone] fax:[phone] toll free (canada) 1-800-361-2308
JANUARY, 2002
installation
and service manual
sstteeaamm
hhuummiiddiiffiieerrss

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table of contents
1.00 dimensions
2.00 output and power consumption
3.00 positioning & installation
3.10 general recommendations
3.20 positioning of SK300
3.30 wall mounting
3.31 mounting to a stud partition wall
3.32 mounting to a masonry wall
3.33 mounting holes dimensions
3.40 steam output positions
3.50 SK300 (SDU) space distribution unit
4.00 plumbing connections
4.10 shut off valve
4.20 water connections
4.30 water connection (detail for SK300)
5.00 installation of steam hoses and steam pipes
5.10 Installation of steam pipes
5.20 installation of “S” straps wit steam supply hose and pipe
5.30 positioning of
S . A . M . and S . A . M . E 2manifolds in the horizontal duct
5.40 installation of
S . A . M . and S . A . M . E 2steam distribution pipes
5.50 REGULAR and S . A . M . steam distribution pipe requirements
5.60 positioning of REGULAR and S . A . M . manifolds (1-3/8”, 35mm or 2-1/8”,
54mm) in vertical ducts
5.70 M.S. (
MULTI STEAM ) manifold
6.00 electrical connections
6.10 SK300 ON/OFF units: (Low voltage control terminals)
6.20 SK300 MODULATING units: (Low voltage control terminals)
6.30 power supply connections
6.40 SK300M proportional unit:
7.00 front panel display features
8.00 programming features
8.10 alphanumeric display and control
8.20 off mode
8.30 scroll mode
8.40 diagnostic mode
8.50 menu driven program mode
9.00 control P.C. Board
9.10 main P.C. Board (PCB970819)
9.20 modulating upper P.C. Board PCB971219
10.00 start up procedure
11.00 routine maintenance
12.00 steam container cleaning instructions
13.00 exploded view of SK300 humidifier
13.10 SK300 humidifier parts list
14.00 trouble shooting
15.00 warranty
page
3
4
5
5
5
5
6
6
6
7
7
9
9
9
10
11,12
13
14
15
16
16
17
18
19
19
20
21
22
23
24
24
24
24
25
26
27
27
27
28
28
29
30
31
32,33
34

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SDU
B
A
D
E
C
SK300
model
SK302
SK304
SK306
SK310
SK314
SK320
SK330
SK340
SK360
A B C D E SDU
SDU-1
SDU-1
SDU-1
SDU-2
SDU-2
SDU-3
SDU-3
-
-
(SDU - SPACE DISTRIBUTION UNIT)
dimensions:
597mm
23½ “
597mm
23½ “
597mm
23½ “
724mm
28½ “
724mm
28½ “
724mm
28½ “
724mm
28½ “
794mm
31¼ “
794mm
31¼ “
470mm
18½ “
470mm
18½ “
470mm
18½ “
533mm
21“
533mm
21“
533mm
21“
533mm
21“
813mm
32 “
813mm
32 “
292mm
11½ “
292mm
11½ “
292mm
11½ “
318mm
12½“
318mm
12½“
318mm
12½“
318mm
12½“
318mm
12½“
318mm
12½“
1
1. .0 00 0
d
di im me en ns si io on ns s: :
(fig. #1 )
(table #1 )
143mm
5-5/8“
143mm
5-5/8“
143mm
5-5/8“
168mm
6-5/8“
168mm
6-5/8“
327mm
12-7/8“
327mm
12-7/8“
-
-
740mm
29-1/8 “
740mm
29-1/8 “
740mm
29-1/8 “
893mm
35-1/8 “
893mm
35-1/8 “
1051mm
4 1 -3/8 “
1051mm
4 1 -3/8 “
-
-

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SK302
SK304
SK306
SK310
SK314
SK320
SK330
SK340
SK360
amperage #of
outlets Øof
outlets
240/1 208/1 208/3 480/1 480/3 600/1 600/3
2 Kw
4 Kw
6 Kw
10 Kw
13.5 Kw
20 Kw
30 Kw
40 Kw
60 Kw
8.5
17
26
-
-
-
-
-
-
10
19
30
-
-
-
-
-
-
-
11.5
16.5
28
38
57
-
120
-
4.5
8.5
13
-
-
-
-
-
-
-
5
7.2
12
16.5
25
36
50
72
3.5
7
10.5
-
-
-
-
-
-
-
4
6
10
13.5
20
30
40
60
1
1
1
1
1
2
2
2
3
13/8 "
13/8 "
13/8 "
13/8 "
13/8 "
13/8 "
13/8 "
21/8 "
21/8 "
Note:
Suffix "M" such as, for example, SK-310M, denotes a modulating humidifier.
Suffix "DI" such as, for example, SK320MDI, denotes a modulating humidifier intended
to operate with deionized water supply.
You can limit the maximum output of the modulating units by going through the Menu
Driven Program Mode into the "LOCK ON" step.
(1)
(2)
(3)
6 lb/hr
2.73 kg/hr
12 lb/hr
5.5 kg/hr
18 lb/hr
8 kg/hr
30 lb/hr
14 kg/hr
40 lb/hr
19 kg/hr
60 lb/hr
28 kg/hr
90 lb/hr
41 kg/hr
120 lb/hr
56 kg/hr
180 lb/hr
82 kg/hr
model power capacity
2
2. .0 00 0
o
ou ut tp pu ut t
a
an nd d
p
po ow we er r
c
co on ns su um mp pt ti io on n: :
WARNING!
Irrespective of the programmed output span reduction, the external
wiring to the unit must correspond to the maximum amperage as
indicated in the above table.
(table #2 )

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3.20 positioning of SK300:
To facilitate service, the unit must be easily
accessible from the front and right hand side.
The unit is to be mounted on a wall using key-
holes accessible from inside the mechanical
compartment (see mounting holes dimensions
section). The humidifier should be mounted
between 1.0m (39 inches) and 1.2m (48 inches)
above floor level. Leave a clearance of at least
25cm (10 inches) under the unit for installation
of water supply, drain piping, and electrical con-
nections. A clearance of at least 1.25m (50 inch-
es) from the front of the unit and 60cm (24 inch-
es) from the right hand side is necessary for
comfortable access and service. The humidifier
should be installed in a normally ventilated area,
and ambient temperatures should not exceed
300C (950F)
3.10 general recommendations:
The humidifier should be installed in an easily acces-
sible location to allow proper access for inspection
and maintenance. The unit should never be installed
in a location where an unusual malfunction of the
unit can cause damage to the structure of the build-
ing, or to very expensive equipment. Typically, the total
length of steam hose to the manifold should not exceed
5 meters (16 feet).
3.30 wall mounting:
The mounting of the humidifier on the wall is to be done by using the mounting keyholes accessible from inside
the mechanical compartment. Before installation, remove the steam container as described in the mainte-
nance instructions.
note: when marking pilot holes, make sure that the humidifier is level.
IMPORTANT
FOR SAFETY REASONS, POWER MUST BE
TURNED OFF AT THE EXTERNAL BREAK-
ER WHILE INSTALLING THE UNIT AND
BEFORE REMOVING OR DISCONNECTING
ANY ELECTRONIC OR MECHANICAL
COMPONENTS.
FAILURE TO DO SO IS DANGEROUS AND
WILL VOID THE WARRANTY.
3
3. .0 00 0
p
po os si it ti io on ni in ng g
a
an nd d
i
in ns st ta al ll la at ti io on n: :
60cm
24 in
MIN
1m - 1.2m
39 - 48 in MIN
25cm
10 in
MIN
(fig. #2 )

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3.33 mounting holes dimensions:
(table #3)
front view (fig. #3 )
3.31 mounting to a stud partition
wall:
It is necessary to mount the humidifier directly to
the wall studs. For screwing into wooden studs, drill
3/32" pilot holes into the studs and use no. 10 x
1½" wood screws, preferably of the round head
type. Screw in the upper screws (supplied by others)
until ¼" to ½" of the screw head is left projecting,
and screws are firm enough to carry the cabinet
weight prior to tightening. With the mechanical door
open, and according to the cabinet size and weight
and with the assistance of another person, hang the
upper keyhole slots over the projected screws.
Carefully lower into position flat against the wall and
tighten. On larger units (SK310 and up), also apply
lower screws. Tighten all screws securely.
3.32 mounting to a masonry wall
(brick, concrete, solid block):
The wall must be sufficiently solid to provide a
secure anchorage. Use ¼" threaded x 2¼" minimum
length stud bolt anchors which provide an externally
threaded stud protruding from the wall as per
instructions. Drill hole with size and depth to bolt.
Drive in stud bolt anchor. With stud bolt anchors
securely in place, position the mounting keyholes
over the protruding studs and carefully lower the
humidifier into position against the wall surface.
According to the cabinet size and weight, use anoth-
er person to assist you in placing the unit. Apply
washer and nuts and tighten fully to torque recom-
mended by the bolt supplier. On larger units (SK310
or larger), also apply the lower mounting holes.
dim
A
B
C
D
E
F
G
SK
302, 304, 306 SK
310, 314, 320,
330 SK
340, 360
-
203mm
8“
132mm
5-3/16“
502mm
19¾“
-
-
-
-
254mm
10“
203mm
8“
549mm
24-5/8“
279mm
11“
203mm
8“
254mm
10“
102mm
4“
305mm
12“
267mm
10½“
622mm
27½“
279mm
11“
468mm
18-3/8“
-

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dim
I
J
K
L
M
N
O
P
Q
SK
302,
304,306
SK
310, 314 SK
340,360
110mm
4-5/16“
122mm
4-13/16“
-
-
-
-
-
-
-
-
-
-
102mm
4“
143mm
5-5/8“
-
-
-
-
-
-
-
-
-
179mm
7“
179mm
7“
132mm
5-3/16“
144mm
5-11/16“
3.50 SK300 (SDU):
space distribution unit
The SDU units are mounted in the
same fashion as standard units.
Note that:
a) The humidifier should be mounted
such that the fan section is at least 2m
(7 feet) above the floor.
b) A minimum clearance of 450mm
(1½ feet) from the ceiling should be
allocated to avoid ceiling and wall con-
densation.
Note: If additional ventilation is not
present, the fan must have a clearance
from the ceiling of at least 1350 mm
(4 ½feet). Proper ventilation must be
observed to avoid ceiling and wall con-
densation.
(table 4)
Top view (fig. 4)
25cm
10 inches
45cm
1½ feet
MIN
2m
7 feet
MIN
60cm
2 feet
MIN
MIN
3.40 steam output positions:
(fig. 5)
without additional
ventilation increase to 135 cm (4 ½feet)
SK
320, 330,
-
-
134mm
5-9/32”
102mm
4“
143mm
5-5/8“
-
-
-
-
SK340 SK360
Small cabinet
(SK302, 304, 306)
Medium cabinet
(SK310, 314) (SK320, 330)
Large cabinet
(SK340) (SK360)

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SK300 (SDU):
space distribution unit-remote mounted
The SDU units are mounted in the same fashion as standard units.
Note that:
a) The humidifier should be mounted such that the (SDU) fan section is at least 2m
(7 feet) above the floor.
b) A minimum clearance of 45 cm (1½ feet) from the ceiling should be allocated to
avoid ceiling and wall condensation.
Note: If additional ventilation is not present, the fan must have a clearance from the
ceiling of at least 135 cm (4 ½ feet). Proper ventilation must be observed to avoid
ceiling and wall condensation.
C) The humidifier can be in a different location from the SDU. Follow all piping recom
mendations in the installation manual.
For SK302 to SK310 For SK314 to SK330

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4.00 plumbing connections:
The SK300 humidifiers are independent of vari-
able water conditions and can operate equally
well with hard or soft water. Therefore, for normal
operation, no pre-treatment of water is ne-ces-
sary.
4.10 shut off valve:
An isolating shut off valve should be fitted in the
water supply line to the unit and installed close to
the humidifier to facilitate servicing. It is recom-
mended to install a standard water strainer in
the water supply line.
4.20 drain connection:
The outlet for the two drain connections is a cop-
per connector on the underside of the unit.
Standard copper pipe can be used to provide the
connection between the unit and the two drain
connectors.
Ensure proper drainage from the unit, especially
if more than one unit is evacuating into the same
drain line. The temperature rating on the drain
must be 830C (1800F) minimum.
Follow the drain detail drawing as shown on the
right. All plumbing locations are shown in the
drawing on the right. (fig. #6)
open drain
"P" trap
by
others
fill valve
connector 3/8”
pan drain connector
½" copper
drain connector
¾" copper
10"
cap
model
SK302, 304,306
SK310, 314, 320, 330
SK340, 360
inlet outlet
(top view)
1.75”
pan
drain
½"
copper
3/8”
copper
¾"
copper
A
165mm
6½“
184mm
7¼“
179mm
7“
B
51mm
2“
44mm
1¾“
44mm
1¾“
C
105mm
4-1/8“
105mm
4-1/8“
105mm
4-1/8 ”
D
60mm
2-3/8“
70mm
2-¾“
70mm
2-¾“
(fig. 6 )
(fig. 7 )
(table 5)

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4.30 water connection of the SK300:
ATTENTION! Please respect the following sequence of installation.
1. Connect 3/8” copper pipe to
the bottom 3/8” compression fit-
ting.
2. Finger tighten the swivel top
fitting to the male threaded part
of the valve. (Do not tighten with
a wrench!)
4.40 water connections:
The water inlet specifications are:
* 10 to 70 psig inlet water pres-
sure
* 300C (850F) maximum tempera-
ture
* 3/8" standard copper water
line connection
(3/8” OD)
* 3/8” copper fitting compression
supplied
with unit.
male threaded
part of the valve
swivel top
compression
fitting
3/8” copper pipe
bottom of cabinet
tube
valve
1
2
(fig. #8)

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note: for critical absorption distances, contact the factory at: 1-800-361-2308 or 1-514-333-1433
5
5. .0 00 0
i
in ns st ta al ll la at ti io on n
o
of f
s
st te ea am m
h
ho os se es s
a
an nd d
s
st te ea am m
p
pi ip pe es s: :
steam absorption:
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 particu-
lar application.
(fig. 10)
A) "MULTI-STEAM" system:
The MULTI
- STEAM
system is to be
installed in critical locations in air handling
systems, particularly where absorption dis-
tances are very short (less than 3 feet) or
low air duct temperatures are in effect.
B) "S.A.M."
(steam absorption manifold)
The SAM is to be installed where absorp-
tion distances are short (less than 5 feet)
and /or low duct temperatures are in effect.
(fig. 9)

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note: for critical absorption distances, contact the factory at: 1-800-361-2308 or 1-514-333-1433
manifold
bracket
manifold
1
D) "vertical" manifold:
S . A . M . OR S . A . M . E 2 MANIFOLDS are used where the absorption dis-
tancesare normaland theclient requiresfor aneconomical as
well as an efficient solution.
(fig. 11)
(fig. 12)
450
C) "S.A.M.E2"
(steam absorption manifold)
The S.A.M.E2 is to be installed where
absorption distances are short (less than 5
feet) and /or low duct temperatures are in
effect. S.A.M.E2 are used in applications with
restricted duct dimensions.
450
S.A.M.E2 S.A.M.

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5.10 installation of steam hoses and steam pipes:
Follow these general rules when
installing rigid copper piping or flex-
ible hose to carry the steam from
the humidifier to the steam distribu-
tors.
A) At no point of the installation
should the slope of the steam hose
or pipe be less than 15% which
means 7 horizontal length to 1 ver-
tical length. This is important to
ensure continuous drainage of con-
densation back to the humidifier or
to the steam trap.
B) The lowest point of any steam
hose or rigid pipe run must be the
humidifier, or steam trap (S type).
The "S" separator must have a trap
higher than the static pressure of
the system by at least 2 inches.
C) Total length of the steam hose,
or rigid pipe should not exceed 5
meters (16 feet). Longer runs will
result in added condensation loss-
es. Whenever possible, use insulat-
ed copper piping. "Flexible” steam
hose should be used for short runs
(up to 5 meters) or for intercon-
necting between the rigid pipe runs.
D) Whenever using rigid copper
pipe 1- 3/8" or 2-1/8" for larger
units, use pipe insulation to diminish
condensation build up.
correct installation
condensation
pocket
15%
minimum
slope
"S" trap
to drain
(fig. #14)
(fig. #13)
incorrect installation

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5.20 installation of "S" straps with steam supply hose and pipe:
use "S"
separator
when ceiling
space is
limited and
you need to
create 15%
slopes
15%
15%
8”
8” use "S"
separator
when the
steam
distributor
is lower
than the
humidifier's
steam outlet
steam
outlet
steam
outlet
(fig. #16)
(fig. #15)

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5.30 positioning of REGULAR or S.A.M. manifolds in the horizond duct:
2 steam distributor pipes 35mm (1-3/8")
2 steam distributor pipes 54mm (2-1/8")
3 steam distributor pipes 54mm (2-1/8")
air
air
air
air
Once location has been determined:
* For 35mm (1-3/8") diameter manifold:
use the template and drill a hole 51mm (2") for
pipe installation. Secure using appropriate sheet
metal screws (supplied by others).
Follow the drawings below to determine proper place-
ment of the steam pipes in the duct.
* For 54mm (2-1/8") diameter manifold:
use the template and drill a hole 78mm (3") for
pipe installation. Secure using appropriate sheet
metal screws (supplied by others).
Note that the 54mm (2--1/8") steam pipe must
be supported on the end by an appropriate duct
hanger/strap (supplied by others).
Follow the drawings below to determine proper place-
ment of the steam pipes in the duct.
Note: Since the manifold is sloped at a ration of 8
horizontal lengths to 1 vertical length, ensure that the
minimum distance of the end of the manifold is at least
4 inches from the top of the duct.
(fig. 17)
(fig. 18)
(fig. 19)
(fig. 21)
(fig. 20)
(fig. 22)
1 steam distributor pipe 35mm (1-3/8")
unit 35mm (1-3/8")
D = 2"
unit 54mm (2-1/8")
D = 3
diameter duct mounting
detail of steam distribu-
tion pipe support bracket

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5.40 installation of S.A.M. or REGULAR steam distribution pipes:
342
1
1
4
3
6
5
15%
2
2
Notes:
Ensure that the flexible hose is not kinked.
A minimum slope of 7 horizontal to 1 vertical lengths
must be respected in order to ensure drainage of con-
densation back to the humidifier or to the steam trap.
SK300 model
max output (lb/hr)
max output (Kg/hr)
# 35mm (1-3/8") pipes
#54mm (2-1/8") pipes
min. pipe length (mm)
min. pipe length (in)
max pipe length (mm)
max pipe length (in)
max. static
pressure (in W.G.)
302
6
2.7
1
-
300
12
600
24
5
(1245)
304
12
5.5
1
-
300
12
600
24
5
(1245)
306
18
8
1
-
300
12
600
24
5
(1245)
310
30
14
1
-
600
24
1200
48
5
(1245)
314
40
19
1
-
600
24
1200
48
5
(1245)
320
60
28
2
-
600
24
1200
48
5
(1245)
330
90
41
2
-
750
32
1500
64
5
(1245)
340
120
56
-
2
750
32
1500
64
5
(1245)
360
180
82
-
3
750
32
1500
64
5
(1245)
5.50 S.A.M. or Regular steam distribution pipe requirements:
1 clamps
2 flexible hose
3 rigid copper pipe
4 insulation
5 steam distribution
manifold
6 duct
typical rigid installation
SK300
note: for higher static pressure, please contact the factory.
1 clamp
2 flexible hose
3 steam distribution
manifold
4 duct
typical flexible installation
2
1
4
3
15%
SK300
(fig. #23)
(fig. #24)
(table #6)

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(fig. #25) (fig. #26)
(fig. #27) (fig. #29)
5.6 positioning of S . A . M .or S . A . M . E 2manifolds (1-3/8", 35mm or 2-1/8",
54mm) in vertical ducts:
Follow the drawings below to determine proper placement of the steam pipes in the duct.
one pipe vertical two pipes vertical
45
0
top view
(fig. 28)
three pipes vertical
54mm ( 2 1/8” ) distributors only
45
0
S.A.M. S.A.M.E2

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A
B
C
D
E
F
G
Main Steam Header stainless steel
Steam Manifolds 1-3/8" stainless steel
Typical Steam Nozzle
Condensation Run 3/4" (by others)
Steam Adapter
Length of Header
Height of Manifold
Duct Width
Duct Height
Hangers (by others)
“U” Trap (by others)
Flexible Steam Hose
2” Bracket or stainless steel nut
H
I
J
K
L
M
I
J
Min 2” (5cm)
Min
2”
(5cm)
Min
4”
(10cm)
Min
2”
(5cm)
(fig. #30)
5.70 M.S. (Multi Steam) manifold:

19
S
SK K3 30 00 0
h
hu um mi id di if fi ic ca at ti io on n
m
ma an nu ua al l
6
6. .0 00 0
e
el le ec ct tr ri ic ca al l
c
co on nn ne ec ct ti io on ns s: :
6.10 SK300 ON/OFF units: (Low voltage control terminals)
(electrical compartment detail)
L1 L2 L3
High voltage
power terminal
Block
Low voltage
control terminal
block
1 2
1 2
P.D.
Switch
high
limit
humidistat
5 volt DC 5 volt DC
SK300 ON/OFF
control terminal
block wiring
2 PHASE
3 PHASE
1 PHASE
(fig. #31) (fig. #32)
WARNING!
High voltage power terminal block are designated L1, L2, L3
Low voltage control terminal blocks are designated 1,2,3,4
DO NOT INTERCHANGE!!

20
S
SK K3 30 00 0
h
hu um mi id di if fi ic ca at ti io on n
m
ma an nu ua al l
6.20 SK300 modulating units: (Low voltage control terminals)
(electrical compartment detail)
WARNING!
High voltage power terminal block are designated L1, L2, L3
Low voltage control terminal blocks are designated 1,2,3,4
DO NOT INTERCHANGE!!
(fig. 33) (fig. 34)