Neptronic SKE4-N Series User manual

SKE4-N-Remote SDU Guide-190201
SKE4-N Steam Humidifier
Remote SDU Installation Guide

SKE4-N Steam Humidifier
Remote SDU Installation Guide
www.neptronic.com
Page | 1
Dimensions and Weight
A
B
Condensate
Outlet Steam
Outlet Electrical Supply
Bottom View
Illustration 1 - Remote SDU
Table 1 - Dimensions and Weight
Model
SDU
Dimensions
(inch) [mm]
Steam Outlet
Weight
(lb) [kg]
A
B
Qty
Diameter
(inch) [mm]
SKE4-N02
SKE4-N04
SKE4-N06
SDU4-1
6 ¾
[171]
19 ⅜
[492]
1
1 ⅜ [35]
15 [7]
SKE4-N10
SKE4-N14
SDU4-2
7 ¾
[197]
22 ¼
[565]
1
1 ⅜ [35]
20 [9]
SKE4-N16
SKE4-N20
SKE4-N30
SDU4-3
11 ⅜
[289]
22 ¼
[565]
1
2 [51]
30 [14]

SKE4-N Steam Humidifier
Remote SDU Installation Guide
www.neptronic.com
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Mechanical and Piping Installation
Positioning
The SDU must be installed in an environment where the air is relatively clean. This will prevent the blower
from getting clogged with dust.
The SDU must be mounted such that the SDU fan section is at least 78” (2 m) above the floor.
Allocate a minimum clearance of 18” (0.45 m) from the ceiling to avoid ceiling and wall condensation.
If additional ventilation is not present, ensure that the fan has a clearance of at least 54” (1.35 m) from the
ceiling. Proper ventilation must be observed to avoid ceiling and wall condensation.
Remote Installation
To install the remote SDU, follow the guidelines and piping recommendations outlined below.
Mount the SDU to the wall on brackets (supplied). Do not drill mounting holes through the cabinet of the SDU.
Connect the steam hose to the bottom inlet of the SDU and to the humidifier steam outlet located on top of
the cabinet.
Secure the steam hose with the hose clamp (supplied).
Connect the condensate hose to the bottom of the SDU and to an open drain or to the humidifier using the
knockout hole located on the top of the cabinet.
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 five minutes after steam production has stopped to prevent
condensation.
Avoid any obstruction of the ventilation openings on top of the SDU.
18''
(0.45 m)
78''
(2 m)
Field piping
(by others)
Without
additional
ventilation
54'' (1.35 m)
Field wiring
(by others)
4''
(0.10 m)
Connect condensate
hose to humidifier
(back knockout hole)
Or to open drain
Illustration 2 - Remote SDU Installation

SKE4-N Steam Humidifier
Remote SDU Installation Guide
www.neptronic.com
Page | 3
Connecting Condensate Hose to Humidifier
If connecting a condensate hose to the humidifier using the top knockout hole, remove the plug from the open silicone
pipe near the water fill valve. Then, insert a ½” fitting (not supplied) inside of the silicone pipe and connect the end of the
½” condensate hose (not supplied) on the fitting. Use a hose clamp (not supplied) on each end of the hose to secure the
connection.
Remove the plug
Connect the condensate hose
Illustration 3 - Condensate Hose Installation

SKE4-N Steam Humidifier
Remote SDU Installation Guide
www.neptronic.com
Page | 4
Wall Mounting the Remote SDU
A
B
C
4"
(102mm)
D
E
Illustration 3 - Remote SDU Mounting Bracket
Table 2 - Remote SDU Mounting Bracket Dimensions
Model
SDU
Dimensions (inch) [mm]
A
B
C
D
E
SKE4-N02
SKE4-N04
SKE4-N06
SDU4-1
16 [406]
6 ¾ [171]
13.7 [348]
¾ [19]
1 ⅛ [29]
SKE4-N10
SKE4-N14
SDU4-2
18 ½ [470]
7 ½ [191]
14.9 [377]
1 [25]
1 ¾ [45]
SKE4-N16
SKE4-N20
SKE4-N30
SDU4-3
18 ½ [470]
7 ½ [191]
18.9 [480]
1 [25]
1 ¾ [45]

SKE4-N Steam Humidifier
Remote SDU Installation Guide
www.neptronic.com
Page | 5
Remote SDU Cover Installation (Option)
Perform the following steps to install the optional remote SDU cover:
1) Secure the two side covers onto the remote SDU mounting bracket by fastening them with 3x 6-32 (M3.5 x 0.6)
nuts (supplied).
2) Secure the front cover onto the remote SDU mounting bracket by fastening it with 6x 8-32 (M4 x 0.7) screws
(supplied).
1
1
2
SDU
SDU
Mounting
Bracket
Side
Cover
Front
Cover
Side
Cover
Illustration 4 - Remote SDU Cover Installation

SKE4-N Steam Humidifier
Remote SDU Installation Guide
www.neptronic.com
Page | 6
Electrical Installation
CAUTION: Risk of electric shock. Disconnect the SDU from the electric supply before proceeding
with the connection.
The wiring to the SDU must be done by a qualified electrician and must conform to the procedure, regulation
and local codes.
Use copper conductors only.
An external over current protection must be installed on the supply, adjacent to the SDU. It is also
recommended to install a circuit breaker.
To provide strain relief to the supply cable, install a knock-out (not supplied) at the bottom of the SDU.
Ensure that the size of the wire conductors is appropriate for the current supplied.
Ensure that each terminal connection is properly secured.
Ensure that the ground conductor is equipped with a ring terminal and is connected directly to the electrical
panel.
Table 3 - SDU Power Supply Specifications
Model
SDU
Amperage (A)
120V/1ph
208V/1ph
240V/1ph
480V/1ph
600V/1ph
SKE4-N02
SDU4-1
0.3
0.2
0.2
0.1
0.1
SKE4-N04
-
0.2
0.2
0.1
0.1
SKE4-N06
-
0.2
0.2
0.1
0.1
SKE4-N10
SDU4-2
-
0.4
-
0.2
0.2
SKE4-N14
-
0.4
-
0.2
0.2
SKE4-N16
SDU4-3
-
0.4
-
-
0.2
SKE4-N20
-
-
-
0.2
0.2
SKE4-N30
-
-
-
0.2
0.2

SKE4-N Steam Humidifier
Remote SDU Installation Guide
www.neptronic.com
Page | 7
Wiring Diagrams
SDU Fan
Fuse
PD Switch
Red
Grey
Red
Red
Purple
SDURelay
Orange
Black
Blue
Power
supply
for SDU
Ground
L
N
Wiring by
others
SDU Terminal
Block
Humidifier
Terminal Block
Illustration 5 - Wiring for SDU4-1 Model at 120V or 240V (1ph)
SDU Fan
Fuse
PD Switch
Red
Black
White
Red
Grey
Transformer
Red
Green
Purple
SDURelay
Orange
Black
Blue
Power
supply
for SDU
Ground
L
N
Wiring by
others
SDU Terminal
Block
Humidifier
Terminal Block
Illustration 6 - Wiring for SDU Model at 208V, 480V or 600V (1ph)