nor-tec NH-EL Series User manual

NH-EL
Series
Installation and
Operation Manual
Includes installation, operation
maintenance and troubleshooting
information for your NH-EL Electric
Steam humidifier
2570435 D | 25 JUN 2014
Important: Read and save these instructions. This guide to be left with equipment.

Thank you for choosing Nortec.
Proprietary Notice
This document and the information disclosed herein are proprietary data of Nortec Humidity Ltd. Neither this
document nor the information contained herein shall be reproduced, used, or disclosed to others without the
written authorization of Nortec Humidity Ltd., except to the extent required for installation or maintenance of
recipient’s equipment.
Liability Notice
Nortec does not accept any liability for installations of humidity equipment installed by unqualified personnel or
the use of parts/components/equipment that are not authorized or approved by Nortec.
Copyright Notice
Copyright 2014, Nortec Humidity Ltd. All rights reserved.
INSTALLATION DATE (MM/DD/YYYY)
MODEL #
SERIAL #
CYLINDER #

Contents
1 Introduction
2 Receiving and Unpacking
3 Humidifier Components
5 NH-EL Models
6 Options and Accessories
9 Installation
10 Typical Humidifier Installation
11 Location
13 Mounting with Keyholes
14 Plumbing
15 Steam Distributor
16 Steam Lines and Condensate
Returns
21 Electrical
22 External Controls
36 Options and Accessories
38 Start Up
39 Installation Check
40 NH-EL User Interface
41 Start Up Procedure
42 Information Screens
43 Nortec Digital Controls
46 NH-EL Pre-Start Up Checklist
47 NH-EL Start Up Checklist
48 Operation
49 LED Status Lights
51 How the Humidifier Works
54 NH-EL Humidifier Configuration
62 Maintenance and
Servicing
63 Required Maintenance
68 Extended Shutdown
69 NH-EL Maintenance Checklist
70 Troubleshooting
72 General Troubleshooting
75 NH-EL Warnings and Faults
81 NH-EL Wiring Diagram (Cylinder A)
82 NH-EL Wiring Diagram (Cylinder B)
83 Spare Parts
95 Warranty

1 | Introduction
Introduction
CAUTION: Servicing
Disconnect main power before any servicing.
The plumbing and electrical compartments contain high voltage components and
wiring. Access should be limited to authorized personnel only.
During and following operation of the humidifier, the steam and components in
contact with the steam such as the cylinder, blower pack, steam lines, steam
distributors, and condensate lines can become hot and can burn if touched.
Nortec Humidity Ltd. does not accept any liability for installations of humidity
equipment installed by unqualified personnel or the use of
parts/components/equipment that are not authorized or approved by Nortec
Humidity Ltd.
CAUTION: Electrical
All electrical work should be done according to local electrical code.
Electrical connection to be performed by a licensed electrician.
CAUTION: Plumbing
Plumbing to be performed by a licensed plumber.
Drain water from humidifier can be very hot. Do not drain to public sink.
All plumbing work should be done according to local plumbing code.
CAUTION: Installation
Do not mount on hot surfaces.
Do not mount in area where freezing can occur.
Do not mount on vibrating surface.
Do not mount on floor.
The NH-EL produces steam at atmospheric pressure; no devices which could block
steam output should be connected to the steam outlet.
Steam lines must be installed so that no restriction can produce back pressure in
the humidifier. Failure to follow installation instructions will result in improper
operation and could void warranty.
Regardless of selecting On/Off or modulating control method, NORTEC humidifiers
must have a closed circuit across its On/Off security loop control terminal to
operate. NORTEC highly recommends the use of a high limit humidistat and an air
proving switch in series for this function.

Introduction | 2
Receiving and Unpacking
1Check packing slip to ensure ALL material has been delivered.
2All material shortages are to be reported to NORTEC within 48 hours from receipt of goods.
NORTEC assumes no responsibility for any material shortages beyond this period.
3Inspect shipping boxes for damage and note damages on shipping waybill accordingly.
4After unpacking, inspect equipment for damage and if damage is found, notify the shipper
promptly.
5All NORTEC products are shipped on a Free-On-Board (FOB) factory basis. Any and all
damage, breakage or loss claims are to be made directly to the shipping company.
Before Installation
1Ensure that available voltage and phase corresponds with humidifier voltage and phase as
indicated on humidifier’s specification label.
2Ensure that the dedicated external fuse disconnect is of sufficient size to handle the rated
amps as indicated on the specification label. Refer to local codes.
3Report any discrepancy immediately to the site engineer.
4Ensure sufficient clearances will be available as described in Location on page 11.
5Ensure steam lines can be routed to distributor or blower pack as described in Steam Lines
and Condensate Return on page 16.
Figure 1: Specification Label Location

3 | Introduction
Steam Outlet
Condensate Return
Fill Cup
Drain Valve
Drain Canal
Fill Valve
Cylinder
Cylinder Strap
Cylinder Plug
High Water Sensor
Plug
Touch Screen Display
On/Off Switch
Auxiliary Drain Switch
Door Interlock Switch
Driver Board
Remote Relay Board
Contactor
High Voltage
Terminal Block
Transformer
Integrated Controller
Control Terminal
Strip
NOTE:
NH-EL 005-030
shown, component
location may vary
slightly for other
models.
TEST
Humidifier Components
Figure 2: NH-EL Humidifier Components

Introduction | 4
Description of Components
Table 1: Humidifier Components
Component
Function of Component
Auxiliary Drain
Drains water from cylinder by activating drain valve. Note that initiating a
drain in this manner will not induce Drain Water Cooling.
Condensate Return
Provides a connection to return condensate to humidifier.
Contactor
Turns On/Off power to cylinder electrodes.
Control Terminal
Strip
Terminal strip for connecting external controls and blower pack to
humidifier.
Cylinder Plug
Power connectors to electrodes in cylinder.
Cylinder strap
Securely holds cylinder in place.
Cylinder
Holds electrodes in water. Current between electrodes generates heat used
to generate steam.
Touch Screen
Display
User interface for configuring the humidifier.
Door Interlock
Switch
Prevents contactor from engaging when door is removed (pull out to
override this safety feature while troubleshooting).
Drain Canal
Combines cylinder drain water and fill cup overflow into a single drain outlet.
Drain Valve
Drains water from cylinder.
Driver Board
Provides input and output connections to humidifier components.
Fill Cup
Provides an air gap for backflow prevention.
Fill Valve
Controls flow of water into humidifier.
High Voltage
Terminal Block
Primary power connection from remote disconnect to humidifier.
High Water sensor
Plug
Used to detect max water level in cylinder.
On/Off Switch
Turns power On/Off to humidifier controller. Note: Turn off humidifier
disconnect to shut off primary power to the humidifier.
Remote Relay
Board (option)
Provides a terminal strip to dry contacts which open/close to indicate the
humidifier is on, humidifying, needs service, or is in a fault condition.
Steam Outlet
Connect to steam line with steam hose.
Integrated
Controller
Controls all functions of the humidifier’s operation and provides user
interface for configuration of the humidifier.
Transformer
Steps primary voltage down to 24 VAC for the controller and internal
components such as the fill valve and drain valve.

5 | Introduction
NH-EL Models
The NH-EL with its Integrated Controller and state-of-the-art features and options is the most
advanced electrode steam humidifier available. As well as controlling the operation of the
humidifier, the Integrated Controller can be connected directly to BACnet and to the Internet.
The NH-EL is available in capacities ranging from 5 lb/hr (2 kg/hr) to 200 lb/hr (90 kg/hr). NH-
EL humidifiers are packaged in three different cabinets depending on capacity. Figure 3: NH-EL
Sizes shows the configuration and relative size of the three different cabinets. NH-EL models up
to 100 lb/hr (45 kg/hr) are also available with a built on blower pack. Table 3 provides
specifications for the NH-EL product line.
Figure 3: NH-EL Sizes
Double Unit (NH-EL 150-200)
NH-EL double units have two cylinders to provide increased capacity. The construction and
installation of double units is identical to units with a single cylinder with the following
exceptions:
Double units have two driver boards (designated A and B). One driver board controls each
cylinder. (See Figure 3: NH-EL Sizes).
Double units can operate both cylinders in series or parallel from a single set of control
signals or independently based on two sets of control signals (see Double Mode (NH-EL 150-
200 only) on page 56 for configuration instructions).
Independent Operation - If configured for independent operation then 2 sets of control
wiring must be provided. Control wiring for each cylinder must be connected to the
cylinder’s corresponding driver board/terminal strip and each cylinder performs
independent of the other.
Parallel Operation - If configured for parallel operation then only one set of control wiring is
required and the cylinders operate in parallel. The advantage is even wear on both cylinders.
Series Operation –If configured for series operation, then only one set of control wiring is
required and the cylinders operate in series. Cylinder A’s output range is 0-50% and
Cylinder B’s output range is 50-100%. The advantage is the lower turndown ratio of one
cylinder.
Double units have one primary power connection but have individual fill, drain, and steam
outlet connections for each cylinder.
NH-EL 005-030 NH-EL 050-100 NH-EL 150-200
Fill Connections Drain Connections

Introduction | 6
Options and Accessories
NORTEC provides a complete line of options and accessories for every humidification
application. The following options and accessories are available and may have been delivered
with your NH-EL humidifier. Refer to the installation instructions that came with the accessories
for the proper installation and operation.
Table 2: Options and Accessories
Option / Accessory
Application
Steam Distributors
Adding steam into air ducts.
Remote Blower Pack
Adding steam into a space remote from the humidifier.
SAMe Steam Distribution Manifold
Adding steam into air ducts where short absorption is required.
Digital or Analog Control Humidistats
Controlling the output of the humidifier based on sensed RH (can
be mounted in the space being humidified or in the duct).
Digital RH Transducers
Communicating RH in a space or duct to the humidifier.
Digital or Analog High Limit Humidistats
Preventing over humidification in a duct by shutting down or
throttling down the humidifier when duct RH gets high.
Air Proving Switches
Ensuring humidification only occurs when air is moving in a duct.
Fill Cup Extension
Increasing the steam back pressure capability of an NH-EL.
Drain Water Cooling (Extreme)
Cooling drain water to less than 120 °F (49°C).
Foam Detection Kits
Increasing the range of water quality in which an NH-EL can
operate.

7 | Introduction
Table 3: NH-EL Specifications
Phase
Capacity
lb (kg)
Volts
NH-EL
Part No.
Amps
Max
Ext
Fuse
KW
Stand-
ard
Cylinder
Fill
gal (l)
per min
Net/Full
Weight
lb (kg)
1
5 (2.3)
110-120
2573379
15.6
20
1.9
202
0.13 (0.5)
45/55
(21/25)
10 (4.5)
208
2573380
18.3
25
3.8
202
0.13
(0.5)
220-240
2573382
15.9
20
3.8
202
277
2573383
13.7
20
3.8
202
440-480
2573385
7.9
15
3.8
204
550-600
2573386
6.3
15
3.8
204
20 (9)
208
2573388
36.6
45
7.6
321
0.13
(0.5)
45/65
(21/30)
220-240
2573389
31.7
40
7.6
321
277
2573390
27.5
35
7.6
321
440-480
2573392
15.9
20
7.6
309
550-600
2573393
12.7
20
7.6
309
3
20 (9)
208
2573394
21.1
30
7.6
303
0.13
(0.5)
220-240
2573395
18.3
25
7.6
303
440-480
2573397
9.2
15
7.6
311
550-600
2573398
7.3
15
7.6
311
30
(13.5)
208
2573399
31.7
40
11.4
421
0.3
(1.2)
45/80
(21/37)
220-240
2573400
27.5
35
11. 4
421
440-480
2573402
13.7
20
11.4
411
550-600
2573403
11.0
15
11.4
411
50
(22.5)
208
2573404
51.9
70
18.7
621
0.5
(2.0)
85/150
(39/68)
220-240
2573405
45.0
60
18.7
621
440-480
2573407
22.4
30
18.7
605
550-600
2573408
18.0
25
18.7
605
75 (34)
208
2573409
77.9
100
28.1
621
0.5
(2.0)
220-240
2573410
67.4
90
28.1
621
440-480
2573412
33.8
45
28.1
605
550-600
2573413
27.0
35
28.1
605
100 (45)
208
2573414
94.4
125
34.0
621
0.9
(3.3)
220-240
2573415
90.0
125
37.4
621
440-480
2573417
45.0
60
37.4
605
550-600
2573418
36.0
45
37.4
605
150 (68)
208
2573419
155.8
200
56.1
621
0.5**
(2.0**)
120/245
(55/112)
220-240
2573420
135.0
175
56.1
621
440-480
2573422
67.4
90
56.1
605
550-600
2573423
54.0
70
56.1
605
200 (90)
208
2573424
188.7
250
68.0
621
0.9**
(3.3**)
220-240
2573425
180.0
225
74.8
621
440-480
2573427
90.0
125
74.8
605
550-600
2573428
72.0
90
74.8
605
** Note: Per cylinder basis.

Introduction | 8
Table 4: NH-EL Space Specifications
Phase
Capacity
lb (kg)
Volts
NH-EL
Space
Part No.
Amps
Max
Ext
Fuse
KW
Stand-
ard
Cylinder
Fill
gal (l)
per min
Net/Full
Weight
lb (kg)
1
5 (2.3)
110-120
2573429
17.2
25
2.0
202
0.13 (0.5)
83/93
(38/42)
10 (4.5)
208
2573430
19
25
4.0
202
0.13
(0.5)
220-240
2573431
16.5
25
4.0
202
277
2573432
14.2
20
4.0
202
440-480
2573434
8.2
15
4.0
204
550-600
2573435
6.6
15
4.0
204
20 (9)
208
2573436
37.3
45
7.8
321
0.13
(0.5)
83/103
(38/47)
220-240
2573437
32.3
40
7.8
321
277
2573438
28
35
7.8
321
440-480
2573440
16.2
20
7.8
309
550-600
2573441
13
20
7.8
309
3
20 (9)
208
2573442
21.8
30
7.8
303
0.13
(0.5)
220-240
2573443
18.9
25
7.8
303
440-480
2573445
9.5
15
7.8
311
550-600
2573446
7.6
15
7.8
311
30
(13.5)
208
2573447
32.4
40
11.7
421
0.3
(1.2)
83/118
(38/54)
220-240
2573448
28.1
35
11.7
421
440-480
2573450
14
20
11.7
411
550-600
2573451
11.3
15
11.7
411
50
(22.5)
208
2573452
52.6
70
18.9
621
0.5
(2.0)
123/188
(56/85)
220-240
2573453
45.6
60
18.9
621
440-480
2573455
22.7
30
18.9
605
550-600
2573456
18.3
25
18.9
605
75 (34)
208
2573457
78.6
100
28.3
621
0.5
(2.0)
220-240
2573458
68
90
28.3
621
440-480
2573460
34.1
45
28.3
605
550-600
2573461
27.3
35
28.3
605
100 (45)
208
2573462
95.1
125
34.5
621
0.9
(3.3)
220-240
2573463
90.6
125
37.7
621
440-480
2573465
45.3
60
37.7
605
550-600
2573466
36.3
45
37.7
605

9 | Installation
Installation
10 Typical Humidifier Installation
11 Location
13 Mounting with Keyholes
14 Plumbing
15 Steam Distributor
16 Steam Lines and Condensate Return Instructions
21 Electrical
22 External Controls
22 Control Wiring
22 Control Location
24 On/Off Control Wiring
25 Keep Warm Wiring
26 Modulating Control Wiring
28 Transducer Control Wiring
29 Double Unit Control Wiring
33 Remote Fault Option Wiring
34 Multi Mode Wiring
35 Modbus Digital Control
36 Options and Accessories
37 Fill Cup Extension
37 Extreme Drain Water Cooling
37 Condensate Cooling (External)
37 Foam Protection
37 Internal Fusing
37 Remote Fault Indication

Installation | 10
Typical Humidifier Installation
Mounting
Pg 13
Steam
Distribution
Pg 15
Controls
Pg 22
Plumbing
Pg 14
Electrical
Pg 21
Figure 4: Typical Humidifier Installation
6in.
(15cm)
min.
right
clearance 36 in. (90cm)
min. front
clearance
24 in.
(60cm)
min.
3 in. (7.5 cm) Screws
1- 24VAC
2- Security Loop
3- Common
4- Channel 1
5- Channel 2
6- 5 VDC
7- Ground
8- Blower Pack
9- Blower Pack
On/Off
Controls
Modulation
Controls
E
X
T
E
R
N
A
L
N
H
-
E
L
L1 L2 L3
Ground
Dedicated
Circuit
Breaker or
Disconnect
NH-EL
EXTERNAL
Coldpotable water
150-1200microsiemens
30-80psig
Air Gap
½ in NPT
2 in.
(5 cm)
min.
1ft (30 cm)
1 ft (30 cm)
min.
1 –24 VAC
2 –Security Loop
3 –Common
4 –Channel 1
5 –Channel 2
6 –10 VDC
7 –Ground
8 –Blower Pack
9 –Blower Pack
0” (0 cm)
right
clearance
6” (15 cm)
recommended

11 | Installation
6 in.
(15 cm)
Recommended
Side
Clearance
36 in. (91.5 cm)
Min. Front Clearance
24 in.(61 cm)
Min Height
Mount Humidifier
Level
5-95%
(See Table for
Blowerpack
clearances)
(See Table for
Blowerpack
clearances)
(See Table for
Blowerpack
clearances)
If Blowerpack is used,
mount so that the steam
outlet is at least
96 in. (244 cm)
above ground level.
Location
Mount on a suitable wall or vertical surface. Do not sit the unit on the floor to allow
clearances required for plumbing and electrical connections.
Clearance dimensions shown are for reference only and are the minimum required for
maintenance of the humidifier. Consult local and national codes before final location and
installation. NORTEC does not accept responsibility for installation code violations.
Install only in areas with ambient temperature 41-104 °F (5 –40 °C) relative humidity 5 -
95% (non condensing).
When possible install the humidifier below the steam distributor. Take care to provide proper
steam line routing and proper condensate traps.
DO NOT locate the humidifier any further than absolutely necessary from the steam
distributor location. Net output will be reduced as a result of heat loss through the steam
line.
When possible, mount the NH-EL humidifier at a height convenient for servicing.
Figure 5: Mounting Location / Clearance
Note: Do not mount on hot surfaces, where freezing can occur, vibrating surface, or
floor.

Installation | 12
Table 5: Clearances for Blower Packs on Low Speed*
Humidifier
Capacity
lbs/hr (kg/hr)
Minimum
No. of
Blower
Packs
Min. Frontal
Clearance
Inches (cm)
Min. Overhead
Clearance
Inches (cm)
Min. Left side
Clearance
Inches (cm)
Min. Right side
Clearance
Inches (cm)
30 (13.6)
1
132 (336)
12(31)
12 (31)
12 (31)
100 (45.4)
1
Not
recommended
Not
recommended
Not
recommended
Not
recommended
Table 6: Clearances for Blower Packs on High Speed*
Humidifier
Capacity
lbs/hr (kg/hr)
Minimum
No. of
Blower
Packs
Min. Frontal
Clearance
Inches (cm)
Min. Overhead
Clearance
Inches (cm)
Min. Left side
Clearance
Inches (cm)
Min. Right side
Clearance
Inches (cm)
30 (13.6)
1
120 (305)
12(31)
12 (31)
12 (31)
100 (45.4)
1
248 (630)
36 (91)
30 (76)
30 (76)
*NOTES:
Nominal Conditions 72˚F (22.2˚C), 43% RH.
Low speed not recommended for 100 lbs/hr humidifier. Consult factory for recommendations.
Blower Pack should not be installed near cold surfaces or where dew point may be reached.
Higher humidity or lower room temperature may result in longer absorption distances.

13 | Installation
Mounting with Keyholes
1The NH-EL Series humidifier is wall mounted using keyholes located on the back of the unit
cabinetry.
2Use #12 x 3 in. (7.5 cm) screws mounted into 2x4 studs or better. Two screws are needed
for a single unit (NH-EL 010 to 100). Three screws are needed for a double unit (NH-EL 150
to 200).
3Keyholes are spaced 16 in. (40.6 cm) apart center to center for large units and 11.9 in.
(27.2 cm) apart for small units. Insert screws into the studs until there is 1/4 in. of screw
exposed. Be sure the screws are level to each other.
4Raise the unit and place the screws through the keyholes. Make sure the unit is level, then
tighten the screws to secure the unit in place.
5Place “L”Shaped brackets on top of the unit, with holes inline with the studs. Using the
appropriate sized wood screw, fasten the “L” brackets to the studs, securing the unit from
any upward motion. See Figure 6: Mounting with Keyholes.
Figure 6: Mounting with Keyholes
B
A
Install “L” bracket
after hanging
humidifier
#12 x 3 in. (7.5 cm)
Wood Screws
Insert screws so that
1/4 in. (6 mm) exposed,
hang unit, tighten
screws.
Unit Size Screws Dim A in (cm).Dim B in. (Cm)
5-30 2 11.9 (30.2) -
50-100 2 16 (40.6) -
150-200 3 16 (40.6) 16 (40.6)
SPACESPACE
SPACESPACE
Note: Use screws longer than 3” (7.5 cm) if drywall or other spacer is present.

Installation | 14
Min. 7/8 in. OD drain line.
Keep as short as possible.
Slope down to floor
drain or main drain.
Increase size if combining
multiple drains as in double unit.
1.2 in. (30 mm). OD
un-threaded outlet
with factory supplied
bent hose and clamp.
Air gap required.
2 1/2 in. to 7/8 in. copper
reducer is ideal.
(NORTEC option P/N 2522172)
Hose must not touch
the bottom of the funnel.
Always install a water
shut-off valve.
1/2 in. NPT
Use union to connect
supply pipe to unit.
*Pipe and water shut-off valve not supplied by NORTEC.
Plumbing
Figure 7: Water Supply and Drain Connection
All water supply and drain line connections should be installed in accordance with local
plumbing codes.
Supply water should at 30 to 80 PSIG and be between 150-750 microsiemens (Hardness
0-12 GPG). For 750-1200 microsiemens, please consult factory.
Install water shut off valve and union before humidifier to facilitate servicing.
The drain line should not end in a sink used frequently by personnel, or where plumbing
codes prohibit. Route to a floor drain or equivalent for safety reasons.
Ensure drain line is adequately sized to provide free and easy draining and that an air gap is
installed as shown. A restricted drain can cause cylinder water to over concentrate,
resulting in poor operation or result in water backing up at the air gap.
Note:
Drain Water is very hot, do not drain to public sink
Supply cold potable water (not Reverse Osmosis or Demineralized). Conductivity:
150–750 microsiemens and pressure: 30-80 PSIG.
Use material suitable for 212°F (100°C) for drain and condensate lines.

15 | Installation
Steam Distributor
Steam generated by the NH-EL may be distributed directly into a space with a built on or
remote blower pack, or into an air handling system using either Nortec steam distributors or
Nortec’s SAMe steam distribution manifold.
Whichever method is used, the steam distributor should be installed as close as possible to
the humidifier. Short steam distribution lines minimize condensate losses and the possibility
of generating back pressure in the steam distribution line.
Figure 8: Distributor Location in Duct provides common guidelines for locating a steam
distributor in a duct.
Figure 8: Distributor Location in Duct
12 in.
(30 cm)
min.
Calculated absorption
distance to any obstruction
or 8-10 ft (2.4 - 3 m)
if unknown
Mount distributor
to side of duct
2 x duct
height min. 2/3 Duct
height
Note:

Install the NH-EL as close as possible to whatever steam distributor is used.

Refer to distributor, SAMe, or remote blower pack installation manuals for detailed installation
instructions.

Installation | 16
Steam Lines and Condensate Return Instructions
The following instructions must be followed for installation of steam lines for ASD, BSD, CSD,
SAM-e, and remote blower packs. Failure to use material recommended in
Table 7, exceeding maximum recommended length in Table 7, or failure to follow any other
steam line installation instructions will result in improper operation and could void the warranty.
Table 7: Recommended Steam Line Material*, Maximum Length, Losses
NH-EL
Maximum Steam
MED-L
Stainless
Possible Steam Losses
Model
Line Length
Copper
Steel
(based on 1” insulated copper pipe)
ft
(m)
Tube
Tube
lb/hr/ft
(kg/hr/m)
5
7
(2)
3/4
0.875 X 0.049W
0.06
(0.09)
10
12
(3.5)
20
17
(5)
30
22
(6.5)
50
43
(13)
1 1/2
1.75 X 0.065W
0.11
(0.16)
75/150**
47
(14)
100/200**
50
(15)
Oversized Steam Line (Use for longer steam runs)***
5
14
(4)
1
1.125 X 0.049W
0.06
(0.09)
10
24
(7)
20
34
(10)
30
44
(13)
50
86
(26)
2
2.0 X 0.065W
0.11
(0.16)
75/150**
94
(28)
100/200**
100
(30)
Nortec Steam Hose
5-30
10
(3)
Pt No 1328810 (7/8”)
0.1
(0.15)
50-200**
10
(3)
Pt No. 1328820 (1 3/4”)
0.15
(0.22)
Note: * The use of steam line other than copper, stainless steel tube or Nortec supplied steam line will void the warranty and may
adversely affect the operation of the humidifier.
** Use one steam line per cylinder for NH-EL 150-200 humidifiers. Do not combine lines except at distributor using a Nortec adapter
designed for that purpose and only if humidifiers operate in parallel.
*** These diameters require a reducer at humidifier and steam distributor connection.
Danger:
The NH-EL is an atmospheric humidifier that will only operate properly when its steam
distribution system is installed so that it provides no significant backpressure.
Installing the NH-EL in such a way that backpressure can develop during operation
could result in serious injury or damage to property.

17 | Installation
SteamDirection
SteamDirection
SteamDirection 2 in.
(5 cm)
1 ft (30 cm)
1ft (30 cm)
0.5 in.
(12 mm)
10 Degrees
2 Degrees
Use Appropriate Slope Insulate Pipe
1 in. (2.5 cm) pipe
insulation
Minimal Slope (up)
Minimal Slope (down)
Figure 10: Condensate Traps
Figure 9: Steam Line Slope and Insulation
Trap condensate
Trap at all low points and recommended intervals using full size ‘T’ for traps.
Condensate should not be routed to a sink used frequently by personnel. Route to a floor
drain or equivalent. Condensate normally cools in traps but is still hot. A SAMe or larger
steam line generates more condensate and water may not cool in the trap. A drain water
cooler option may be installed if required by code.
Route condensate to floor drain or equivalent in multi-unit to single SAM-e installation.
12 in. (30 cm)
min drop to
top of ‘P’ Trap
P Trap min
6 in. (15 cm)
or
duct static
pressure + 2 in
whichever is
greater
Tee is same size
as steam line Use a full size tee, not a 90
degree elbow for vertical
to horizontal transitions.
‘P’ Traps Use:
- NORTEC 0.375 in condensate hose
- 1/4 in Med-L copper tubing, or
- 0.375 in stainless steel tubing
Condensate drains must be sloped down.
1 ft (30cm) 0.25 in
(0.6cm)