Condair 2522381 F NHTC Owner's manual

Condair 2522381 F NHTC Owner's manual
Important: Read and save these instructions. This guide to be left with equipment.
NH
Series
Installation and
Operation Manual
Includes installation, operation
maintenance and troubleshooting
information for your NHTC / NHPC
Electric Steam humidifier
2522381-F | 17 SEPT 2009
Thank you for choosing NORTEC.
INSTALLATION DATE (MM/DD/YYYY)
MODEL #
SERIAL #
CYLINDER #
Proprietary Notice
This document and the information disclosed herein are proprietary data of WALTER MEIER LTD. Neither this
document nor the information contained herein shall be reproduced used, or disclosed to others without the
written authorization of WALTER MEIER LTD., except to the extent required for installation or maintenance of
recipient’s equipment. All references to the NORTEC name should be taken as referring to WALTER MEIER LTD.
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 2009, WALTER MEIER LTD. All rights reserved.
Contents
1 Introduction
59 Maintenance and
Servicing
2
Receiving and Unpacking
3
Humidifier Components
60
Required Maintenance
5
NHTC/PC Models
65
Extended Shutdown
6
Options and Accessories
66
Maintenance Checklist
9 Installation
67 Troubleshooting
10
Typical Humidifier Installation
69
General Troubleshooting
11
Location
72
NHTC/PC Warnings and Faults
12
Mounting with Keyholes
79
Wiring Diagrams
13
Plumbing
14
Steam Lines and Condensate
Returns
19
Electrical
20
External Controls
29
Options and Accessories
31 Start Up
32
Installation Check
33
NHTC/PC User Interface
34
Start Up Procedure
35
Status Screens
36
NORTEC Digital Controls
39
Start Up Checklists
41 Operation
42
LED Status Lights
44
How the Humidifier Works
47
NHTC Humidifier Configuration
57
NHPC Humidifier Configuration
81 Spare Parts
92 Warranty
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.
 Walter Meier 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 Walter Meier.
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 NHTC 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 backpressure in
the humidifier.
 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.
1 | Introduction
Receiving and Unpacking
1 Check packing slip to ensure ALL material has been delivered.
2 All 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.
3 Inspect shipping boxes for damage and note damages on shipping waybill accordingly.
4 After unpacking, inspect equipment for damage and if damage is found, notify the shipper
promptly.
5 All NORTEC products are shipped on an FOB factory basis. Any and all damage, breakage or
loss claims are to be made directly to the shipping company.
Before Installation
1 Ensure that available voltage and phase corresponds with humidifier voltage and phase as
indicated on humidifier’s specification label.
2 Ensure 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.
3 Report any discrepancy immediately to the site engineer.
4 Ensure sufficient clearances will be available as described in Location on page 11.
5 Ensure steam lines can be routed to distributor or blower pack as described in Steam Lines
and Condensate Returns on page 14.
Figure 1: Specification Label Location
Introduction | 2
Humidifier Components
High Water Sensor
Plug
Condensate Return
Fill Cup
NOTE:
NHTC 005-030
shown, component
location may vary
slightly for other
models.
Steam Outlet
Driver Board
Cylinder Plug
Cylinder
Remote Relay Board
Cylinder Strap
Display and Keypad
Manual Drain Switch
Drain Valve
Door Interlock Switch
On/Off Switch
Drain Canal
Auxiliaryl Drain Switch
Fill Valve
Control Terminal
Strip
Contactor
Total Controller
High Voltage
Terminal Block
Transformer
Figure 2: NHTC Humidifier Components
3 | Introduction
Description of Components
Table 1: Humidifier Components
Component
Function of Component
Auxiliary Drain
Drains water from cylinder by activating drain valve without software.
Condensate Return
Provides a connection to return condensate to humidifier.
Contactor
Turns On/Off power to cylinder electrodes based on a signal from the
humidifier’s controller.
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.
Display and Keypad
User interface for configuring the humidifier.
Door Interlock
Swtich
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 humidifier.
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.
Manual Drain
Switch
Drains water from the cylinder using software control.
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.
Total 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.
Introduction | 4
NHTC/PC Models
The NHTC with its Total Controller and state-of-the-art features and options is the most
advanced electrode steam humidifier available. The base model NHPC provides steady and
reliable humidification using the same proven cylinder technology as the NHTC. The NHTC/PC is
available in capacities ranging from 5 lb/hr (2 kg/hr) to 200 lb/hr (90 kg/hr). NHTC/PC
humidifiers are packaged in three different cabinets depending on their capacity. Figure 2,
NHTC/PC Models shows the configuration and relative size of the three different cabinets. Both
the NHTC and NHPC models up to 100 lb/hr (45 kg/hr) are also available with a built on blower
pack. Table 2 provides specifications for the NHTC/PC product line.
NHTC/PC 150-200
NHTC/PC 050-100
NHTC/PC 005-030
B
B
Fill Connections
A
A
Drain Connections
Figure 3: NHTC/PC Models
Double Unit (NHTC/PC 150-200)
NHTC/PC 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;
 In addition to having two cylinders double units also have two driver boards (designated A
and B). One driver board controls each cylinder. (see Figure 3: NHTC/PC Models).
 Double units can operate both cylinders in parallel from a single set of control signals or
independently based on two sets of control signals (see Multi Mode on page48 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.
 Double units have one primary power connection but have individual fill, drain, and steam
outlet connections for each cylinder.
5 | Introduction
Outdoor Model
The outdoor model of the NHTC provides a weatherproof enclosure that allows the NHTC to be
installed on rooftops in moderately cool climates. Refer to the installation addendum that is
provided with the outdoor model to insure proper installation.
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 NHTC/PC humidifier. Refer to the installation instructions that came with the
accessories for their proper installation and operation.
Table 2: Options and Accessories
Option / Accessory
Used For
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
Insuring humidification only occurs when air is moving in a duct.
Fill Cup Extension
Increasing the steam back pressure capability of an NHTC/PC
Drain Water Cooling
Cooling drain water to less than 140 °F (60°C)
Foam Detection Kits
Increasing the range of water quality in which an NHTC/PC can
operate.
Introduction | 6
Table 3: NHTC/PC Specifications
Phase
Capacity
lb (kg)
Volts
5 (2.3)
110-120
208
220-240
277
*380
440-480
550-600
208
220-240
277
*380
440-480
550-600
208
220-240
*380
440-480
550-600
208
220-240
*380
440-480
550-600
208
220-240
*380
440-480
550-600
208
220-240
*380
440-480
550-600
208
220-240
*380
440-480
550-600
208
220-240
*380
440-480
550-600
208
220-240
*380
440-480
550-600
10 (4.5)
1
20 (9)
20 (9)
30 (13.5)
50 (22.5)
3
75 (34)
100 (45)
150 (68)
200 (90)
* Not UL Listed
7 | Introduction
NHTC Part NHPC Part Amps
No.
No.
1509620
1509621
1509622
1509623
1509624
1509626
1509627
1509628
1509629
1509630
1509631
1509633
1509634
1509635
1509636
1509637
1509639
1509640
1509641
1509642
1509643
1509645
1509646
1509647
1509648
1509649
1509651
1509652
1509653
1509654
1509655
1509657
1509658
1509659
1509660
1509661
1509663
1509664
1509665
1509666
1509667
1509669
1509670
1509671
1509672
1509673
1509675
1509676
2521984
2521985
2521986
2521987
2521988
2521990
2521991
2521992
2522002
2522003
2522004
2522005
2522006
2522007
2522014
2522015
2522016
2522018
2522019
2522021
2522022
2522024
2522025
2522026
2522027
2522029
2522031
2522032
2522034
2522035
2522036
2522039
2522040
2522041
2522042
2522043
2522045
2522046
2522047
2522048
2522049
2522051
2522052
2522054
2522055
2522056
2522058
2522059
15.9
18.3
15.9
13.7
10.0
7.9
6.3
36.6
31.7
27.5
20.0
15.9
12.7
21.1
18.3
11.6
9.2
7.3
31.7
27.5
17.4
13.7
11.0
47.2
40.9
25.8
20.4
16.4
70.8
61.3
38.7
30.7
24.5
94.4
81.8
51.7
40.9
32.7
141.6
122.7
77.5
61.3
49.1
188.7
163.6
103.3
81.8
65.4
Max Ext
Fuse
KW
Standard
Cylinder
20
25
20
20
15
15
15
50
40
35
30
20
20
30
25
15
15
15
40
35
25
20
15
60
60
35
30
25
90
80
50
40
35
125
110
70
60
45
200
175
100
80
70
250
225
150
110
90
1.9
3.8
3.8
3.8
3.8
3.8
3.8
7.6
7.6
7.6
7.6
7.6
7.6
7.6
7.6
7.6
7.6
7.6
11.4
11.4
11.4
11.4
11.4
17
17
17
17
17
25.5
25.5
25.5
25.5
25.5
34
34
34
34
34
51
51
51
51
51
68
68
68
68
68
202
202
202
202
203
204
204
321
321
321
305
309
309
303
303
311
311
311
421
421
407
411
411
621
621
603
607
607
621
621
603
607
607
621
621
603
605
607
621
621
603
607
607
621
621
603
605
607
Net/Full
Weight
lb (kg)
60 / 89
(27 / 40.5)
95 / 156
(43 / 76)
150 / 272
(68 / 124)
Introduction | 8
Installation
10
11
12
13
14
19
20
20
Control Wiring
20
Control Location
21
On/Off Control Wiring
23
Modulating Control Wiring
25
Transducer Control Wiring
26
27
28
29
9 | Installation
Typical Humidifier Installation
Location
Mounting with Keyholes
Plumbing
Steam Lines and Condensate Returns
Electrical
External Controls
Optional Outdoor Temperature Reset
Remote Fault Option Wiring
Multi Mode Wiring (NHTC Only)
Options and Accessories
29
Built On or Remote Blower Pack
29
Fill Cup Extension
30
Drain Water Cooling
30
Foam Protection
30
Internal Fusing
30
Remote Fault Indication
30
Outdoor Model
Typical Humidifier Installation
Mounting
Pg 12
1ft (30 cm)
2 in.
(5 cm)
min.
Steam
Distribution
Pg 14
3 in. (7.5 cm) Screws
36 in. (90 cm)
min. right
clearance
1 ft (30 cm)
min.
36 in. (90 cm)
min. front
clearance
24 in.
(60 cm)
min.
1- 24 VAC
2- On/Off Loop
3- Ctrl Ground
4- Control Signal
5- Limit Signal
6- 5 VDC
7- Ground
8- Blower Pack
9- Blower Pack
On/Off
Controls
Controls
Pg 20
Plumbing
Pg 13
Dedicated
Circuit
Breaker or
Disconnect
Air Gap
N
H
T
C
/
P
C
L1
L2
L3
E
X
T
E
R
N
A
L
Ground
Modulation
Controls
NHTC/PC
EXTERNAL
½ in NPT
Cold potable water
350-670 microsiemens
30-80 psig
Electrical
Pg 19
Figure 4: Typical Humidifier Installation
Installation | 10
Location
 Mount on a suitable wall or vertical surface. Do not sit the 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 below the steam distributor. If mounted above the steam distributor
take care to provide proper steam line routing and proper condensate traps.
 DO NOT locate the humidifier any further then absolutely necessary from the steam
distributor location as net output will be reduced as a result of heat loss through the steam
line.
 When possible, mount the NHTC humidifier at a height convenient for servicing.
Note: Do not mount on hot surfaces, where freezing can occur, vibrating surface, or
floor.
Blower Pack
Overhead Clearance
5-95%
As Close as
Possible to Steam
Distributor
Blower Pack
Front Clearance
(See Table Below )
36 in. (91.5 cm)
Min. Side Clearance
36 in. (91.5 cm)
Min. Front Clearance
(See Table if
Blowerpack
Installed)
Mount Humidifier
Level
24 in.(61 cm)
Min Height
Humidifier Output lb (kg)
< 10 (4.5)
20 (9)
30 (13.5)
50 (22.5)
75 (38)
100 (45)
Blowerpack Overhead in. (cm)
18 (45)
36 (90)
42 (105)
48 (120)
Blowerpack Front in. (cm)
30 (75)
36 (90)
72 (180)
84 (215)
144 (365)
156 (400)
Figure 5: Mounting Location / Clearance
11 | Installation
Mounting with Keyholes
1 The NHTC Series humidifier is wall mounted using keyholes located on the back of the unit’s
cabinetry.
2 Use #12 x 3 in. (7.5 cm) screws mounted into 2x4 studs or better. 2 screws are needed for a
single unit (NHTC 010 to 100). 3 screws are needed for a double unit (NHTC 150 to 200).
3 Keyholes are spaced 16 in. (40.6 cm) apart center to center for large units and 10.7 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.
4 Raise 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.
5 Place 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.
Note: Use screws longer than 3/4” (7.5 cm) if drywall or other spacer is present.
B
A
Insert screws so that
1/4 in. (6 mm) exposed,
hang unit, tighten
screws.
Install “L” bracket
after hanging
humidifier
#12 x 3 in. (7.5 cm)
Wood Screws
Unit Size
5-30
50-100
150-200
Screws
2
2
3
Dim A in (cm)
.
10.7 (27.2)
16 (40.6)
16 (40.6)
Dim B in. (Cm)
16 (40.6)
Figure 6: Mounting With Keyholes
Installation | 12
Plumbing
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.
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. NPT
Use union to connect
supply pipe to unit.
Always install a water
shut-off valve.
*Pipe and water shut-off valve not supplied by NORTEC.
Figure 7: Water Supply and Drain Connection
Note:
 Drain Water is very hot, do not drain to public sink
 Supply cold potable water, 30 - 80 PSIG, 350 – 670 microsiemens
 Do not use plastic pipe for drain or condensate lines.
 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 350-670 Microsiemens (Hardness
10-20 GPG). Water softener may be used if conductivity remains in recommended range.
 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 it. Route to a floor drain or equivalent for safety reasons.
 Insure 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 and
result in poor operation or result in water backing up at the air gap.
13 | Installation
Steam Lines and Condensate Returns
MAIN RULES FOR ATMOSPHERIC STEAM LINES





Slope the steam lines.
Trap condensate (Use full size ‘T’ for Traps).
Steam lines must not have any restrictions which could cause back pressure.
Insulate with 1.0 in. (2.5 cm) pipe insulation.
Follow recommended materials, size and length see tables.
Use Appropriate Slope
Insulate Pipe
10 Degrees
Direc
Steam
tion
2 in.
(5 cm)
1 ft (30 cm)
2 Degrees
Steam
Dire
Ste
am D
irecction
tion
0.5 in.
(12 mm)
1 in. (2.5 cm) pipe
insulation
1ft (30 cm)
Figure 8: Main Steam Line Requirements
Table 4: Recommended Steam Line Material
Steam Line
Material
Lb/hr (kg/hr)
0-3
3/4 in MED-L Tubing (7/8 in. OD)
30+
3+
*1 in. MED-L Tubing (1 1/8 in. OD)
0-10
0-3
0.875 in. Tube x 0.049 in. thick wall
30+
3+
*1.125 in. Tube x 0.049 inch thick wall
0-20
0-6
1 1/2 in. MED-L Tubing (1 5/8 in. OD)
20+
6+
*2 in. MED-L Tubing (2 1/8 in. OD)
0-20
0-6
1.750 inch Tube x 0.065 inch thick wall
20+
6+
*2.0 inch Tube x 0.065 inch thick wall
0-30 (0-13)
< 10
<3
Part Number 1328810 (7/8”)
31-100 (14-45)**
<10
<3
Part Number 1328820 (1 3/4”)
Copper Tube
31-100 (14-45)**
NORTEC Hose
Steam Line Description
0-10
0-30 (0-13)
Stainless Steel
Tube
Steam Line Length
ft
m
0-30 (0-13)
31-100 (14-45)**
Note: * These diameters require a reducer at humidifier and steam distributor connection
** Use one steam lines per cylinder for NHTC/PC 150-200 humidifiers.
Installation | 14
Table 5: Maximum Recommended Length of Steam Line
NOTE:
Unit Size
Steam Output
(Lb/hr)
Distance
(ft)
Possible Loss
(lb/hr)
Steam Line Size
(in)
NH-005
NH-010
NH-020
NH-030
NH-050
NH-075
NH-100
NH-150
NH-200
5
10
20
30
50
75
100
150
200
8
15
20 *
25 *
40 **
50 **
50 **
50 /cylinder **
50 /cylinder **
1.0
1.5
2.0
2.5
4.0
5.0 to 10.0
5.0 to 10.0
5.0 to 10.0
5.0 to 10.0
3/4
3/4
3/4
3/4
1 1/2
1 1/2
1 1/2
1 1/2
1 1/2
* Use one inch copper steam line for longer runs.
** Use two inch copper steam line for longer runs.
1 This table gives the maximum recommended steam run by unit size.
2 The use of steam line other then copper, stainless steel tube or NORTEC supplied steam line will void the warranty and may
adversely effect the operation of the humidifier
3 The NH-150 and NH-200 are dual units.
Tee is same size
as steam line
Use a full size tee, not a 90
degree elbow for vertical
to horizontal transitions.
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
‘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.
Route to humidifier fill cup if possible.
Figure 9: Condensate Traps
 Route condensate back to humidifier fill cup if possible. Condensate will be
returned to cylinder from fill cup.
 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.
15 | Installation
Calculated absorption
distance to any obstruction
or 8-10 ft (2.4 - 3 m)
if unknown
2 x duct
height min.
2/3 Duct
height
12 in.
(30 cm)
min.
Mount distributor
to side of duct
Figure 10: Distributor Location in Duct
Note:
Refer to distributor or SAMe installation manuals for detailed installation instructions.
Hose cuff
with clamps
1 ft (30 cm)
2 in. (5 cm)
min.
1 ft (30 cm)
min. before
anybend
Condensate line
Insulated copper
steam line. Support
so weight is not on
cylinder.
‘P’ Trap
Use steam hose between
cylinder and steam line.
Figure 11: Steam Distributor Above Humidifier (Copper Steam Line)
Installation | 16
12 in.(30 cm)
min. Radius
(Typical)
1 ft (30 cm)
2 in. (5 cm)
min.
Condensate line
‘P’ Trap
1 ft (30 cm)
min. before
any bend
Figure 12: Steam Distributor Above Humidifier (Hose)
Min 12 in.
(30 cm)
radius
Hose will soften
over time
proper support
Is necessary
Support Brackets
Install Condensate Tee
Before Distributor
1 ft (30 cm)
min. Before
any bend
1 ft (30 cm)
min.
Condensate
Traps
Figure 13: Steam Distributor Below Humidifier (Hose)
17 | Installation
Min 12 in .
(30 cm)
radius
Support Brackets
Hose will soften
over time
proper support
Is necessary
1ft (30 cm)
min. before
any bend
Obstruction
2 in.
(5 cm)
min.
1 ft (30 cm)
min.
1 ft (30 cm)
Use full size condensate tee
at low point. Slope lines up
to “T” and immediately after it.
Figure 14: Steam Distributor Below Humidifier and Obstruction (Hose)
Method for Longer Runs With Limited Vertical Space
Install condensate tee
before distributor
1 ft (30 cm)
min before turn
Condensate
tee every
15-20 ft
(4.5 - 6 m)
Condensate
tee at low
points
1 ft (30 cm)
min.
Individually trap multiple condensate
returns before joining on common line.
To Drain
Figure 15: Long Steam Run
Installation | 18
Electrical
Caution: Wiring to be performed by a licensed Electrician.
Three Phase NHTC/PC
Three Phase Supply
Ground
Ground
L1
L2
L3
Neutral
L1
L2
L3
I
N
T
E
X
T
Dedicated
Circuit Breaker
or
Fused Disconect
Single Phase NHTC/PC
Single Phase Supply
Ground
Ground
L1
L2
Note:
1 Optional internal fuses are not
a substitute for external fuses.
2 Dedicated external fused
disconnect must be installed.
Fusing must not exceed max
circuit protection as indicated
on the specification label.
3 Ensure that adequate power is
available to carry full humidifier
amp draw as indicated on the
specification label.
4 All wiring to be in accordance
with national and local electrical
codes.
L1
L2
E
X
T
I
N
T
Three Phase Supply
Ground
Ground
L1
L2
L3
Neutral
L1
L2
E
X
T
I
N
T
Three Phase Supply
Ground
Ground
L1
L2
L3
Neutral
L1
Neutral
E
X
T
Figure 16: Primary Power Connection
19 | Installation
I
N
T
External Controls
Control Wiring
Controls are available from NORTEC as accessories. If controls were not ordered with humidifier
they must be supplied by others. The following information is relevant to all controls, factory
supplied or otherwise. For wiring use minimum of 18 AWG and keep as short as possible.
The NHTC humidifier can be operated with two modulating inputs. The NHPC has one
modulating input which can be used for a duct high limit or humidity control. Both the NHTC
and NHPC can be operated as On/Off. See Control Setting on page 52 for configuration.
Caution: Failure to wire the humidifier in accordance with the wiring instructions could
cause permanent damage. Such errors will void the warranty.
Control Location
10 ft min
1
Air Proving
Switch
3
2
Duct High
Limit
Humidity
Control
(Return Air
Duct or
in Room)
Figure 17: Control Location
1

2


3



Air Proving Switch
Locate so that it can sense air flow or lack of it.
Duct High Limit
NHTC can be modulating, On/Off, or a humidity sensor. NHPC can be modulating or On/Off.
Locate at least 10 feet from steam distributor or far enough that under normal conditions
steam is fully absorbed.
Humidity Control
NHTC can be Modulating, On/Off, or a Humidity Sensor. NHPC can be modulating or On/Off.
Can be located either in return air duct (preferred) or in room being humidified.
Mount in area representative of room humidity (draft, doorways, sunlight, or overhang such
as a shelf can affect reading). Avoid placing near discharge diffuser of humidified air.
Note: 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.
Installation | 20
On/Off Control Wiring
Air Proving
Switch
Duct High
Limit
2520259 - Digital
On/Off Humidistat
Note: 1 Humidifier will run when circuit between
terminal 1 and 2 on humidifier is closed.
2 Terminal 1 is 24 VAC Hot, turn unit off to
avoid shorting while wiring.
3 Digital Humidistat requires 24 VAC power
from terminals 1 and 3 of humidifier.
4 2520273 - Digital On/Off Duct Humidistat
can also be used for duct high limit. Wire
in series to 3 - Common and 4 - Digital Out
of the humidistat.
Humidifier Terminal Strip
Figure 18: On/Off Controls
1234-
N/C
Com
8 - Temperature
2520259 - Digital On/Off Humidistat
Ground
24 VAC
Common
Digital Out
Duct High Limit
Wire to make on
drop in humidity
N/O
Com
Air Proving Switch
Wire to make when
sensing air flow
C o n n e ct 2 4 VAC ,
te rm in a l 1 o f N H TC /PC to
te rm in a l 2 o f co n tro lle rs
123456789E
X
T
Figure 19: Digital On/Off Humidistat
21 | Installation
24 VAC
On/Off Loop
Ground
Control Signal
Limit Signal (NHTC only)
5 VDC
Ground
Blower Pack
Blower Pack
N
N
H Or H
T
P
C
C
2520273 - Digital On/Off Duct Humidistat Package
Digital On/Off
Humidistat
1 - Ground
2 - 24 VAC
3 - Analog Out
Duct Sensor
7 - Analog In
Duct High
Limit
Wire remote sensor to digital display as shown below,
wire digital display to humidifier as shown above.
1 - Ground
2 - 24 VAC
Air Proving
Switch
Figure 20: Duct Sensor Wiring
Installation | 22
Modulating Control Wiring
Air Proving
Switch
High Limit Humidistat
Control Humidistat
Note: 1 Install On/Off controls or jumper between
terminal 1 and 2 of humidifier in order to run.
2 Terminal 1 is 24 VAC Hot, turn unit off to
avoid shorting while wiring.
3 High Limit Humidistat must be duct mounted.
It can be On/Off or modulating.
4 Control Humidistat can be mounted in space
or in return air duct and can be On/Off or
modulating.
5 The NHPC can only accept one modulating
signal.
Humidifier Terminal Strip
Figure 21: Modulating Controls
8 - Temperature
6 - Analog Out
1 - Ground
2 - 24 VAC
1510142 - Digital Wall Humidistat
6 - Analog Out
7 - Analog In
8 - Temperature
1 - Ground
2 - 24 VAC
2520266 - Digital Duct Humidistat
Package
Insert On/Off
controls or jumper
between 1 and 2
Analog Out - 3
24 VAC - 2
Ground - 1
Connect 24 VAC, terminal
1 of NHTC/PC to terminal
2 of controllers.
Figure 22: Digital Modulating Humidistats
23 | Installation
E
x
t
e
r
n
a
l
1- 24 VAC
2 - On/Off Loop
3 - Ground
4 - Control Signal
5 - Limit Signal (NHTC only)
6 - 5 VDC
7 - Ground
8 - Blower Pack
9 - Blower Pack
N
N
H Or H
T
P
C
C
Wire wall sensor to digital display as shown
below, wire digital display to humidifier as shown
for 1510142 - Digital Wall Humidistat.
6 - Analog Out
1509858 - Wall
Sensor
1 - Ground
2 - 24 VAC
2520261 - Digital
Wall W/O Sensor
7 - Analog In
Duct High
Limit
1 - Ground
2 - 24 VAC
Air Proving
Switch
2520261 - Digital Wall W/O Sensor
+
1509858 - Wall Sensor
Figure 23: Digital Wall Humidistant – Remote Wall Sensor
Installation | 24
Transducer Control Wiring (NHTC Only)
Air Proving
Switch
Duct High Limit
1509857 - 2-10V Duct
Humidity Transducer
Humidity Control
1509858 - 2-10V Wall
Humidity Transducer
Note: 1 Install On/Off controls or jumper between
terminal 1 and 2 of humidifier .
2 Terminal 1 is 24 VAC Hot, turn unit off to
avoid shorting while wiring.
3 Duct High limit can be duct humidity
transducer as shown or duct On/Off humidistat.
4 Humidity Control can be wall humidity
transducer as shown, duct humidity transducer,
or On/Off humidistat.
Humidifier Terminal Strip
Figure 24: Transducers
6 - Analog Out
1509858 - 2-10V Wall Humidity
Transducer
1 - Ground
2 - 24 VAC
1 - Ground
2 - 24 VAC
3 - Analog Out
1509857 - 2-10V Duct Humidity
Transducer
Insert On/Off
controls or jumper
between 1 and 2
C o n n e ct 2 4 VAC ,
te rm in a l 1 o f N H TC to
te rm in a l 2 o f co n tro lle rs
Figure 25: Digital Transducers
25 | Installation
E
x
t
e
r
n
a
l
123456789No
Hn
T l
Cy
24 VAC
On/Off Loop
Ground
Control Signal
Limit Signal
5 VDC
Ground
Blower Pack
Blower Pack
Optional Outdoor Temperature Reset
Figure 26: Outdoor Temperature Reset
6 - Analog Out
Any NORTEC Digital Controller
(Not Transducer)
1 - Ground
2 - 24 VAC
2520263 - Outdoor Temperature
Sensor
1 - 24 VAC
2 - Temperature
 Each digital controller is equipped with an integrated reset function that can reduce the
setpoint during cold weather operation. This will prevent condensation on windows and
building structures. The above graph illustrates how the setpoint reset feature operates.
 This feature is enabled by removing the jumper from terminals 8 and 1 on the humidistat
and wiring the outdoor temperature sensor to these terminals.
 When the outdoor temperature setback feature is in effect, the humidistat will normally
display the calculated setpoint limit based on the outdoor air temperature. A snowflake will
also be displayed to indicate cold weather operation. When any key on the controller is
pressed, the LCD screen will display the customer specified setpoint for a short duration.
Insert On/Off
controls or jumper
between 1 and 2
Note:
1 The Temperature sensor is
intended for duct mounting.
2 Locate the temperature sensor
near the fresh air intake. This
will ensure accurate representation
of the outdoor air temperature.
Connect 24 VAC, terminal
1 of NHTC/PC to terminal
2 of controllers.
E
x
t
e
r
n
a
l
123456789-
24 VAC
On/Off Loop
Ground
Control Signal
Limit Signal (NHTC only)
5 VDC
Ground
Blower Pack
Blower Pack
N
N
H Or H
T
P
C
C
Figure 27: Outdoor Temperature Sensor
Installation | 26
Remote Fault Option Wiring
The NHTC (not NHPC) remote fault option includes 4 relays that can provide remote status
indication. The relays are mounted to a remote fault board which is located as shown in Figure
28: Remote Fault Wiring. The PCB with the relays includes markings which indicate the function
of each terminal on the board. The relays indicate the following status;
1 Unit On – The normally open relay is closed when the humidifier has power and the On/Off
switch is set to on.
2 Steam – The normally open relay is closed when the control board detects that the cylinder
is drawing current and steam is being produced.
3 Service – The relay can be wired to open (NC) or close (NO) when a warning is displayed on
the humidifier display and the yellow service LED is illuminated.
4 Error – The relay can be wired to open (NC) or close (NO) when a fault is detected by the
humidifier controls.
Location on NHTC 005-030
NO
COM
NO
COM
NC
NO
COM
NC
NO
COM
Location on NHTC 050-200
Figure 28: Remote Fault Wiring
27 | Installation
Unit ON
Steam
Service
Error
Multi Mode Wiring (NHTC Only)
 Connect up to 16 units (equivalent of 1600 lb/hr) using 18-24 AWG multi-strand, twisted
pair, shielded cable.
 Connect humidistats/transducers and On/Off safety loop to master unit only.
 When connecting double units connect only to driver board A.
 See Multi Mode on page 48 and Multi Unit Op. Range on page 54for software configuration.
Daisy Chain
up to 16
Humidifiers
Master
Slave 1
Slave X
Install Jumper on
JP1 on last
humidifier
Daisy chain pole 2 and 3
of terminal J2 of the
driver board.
Note:
Do not reverse polarity.
Do not connect to pole 1 or 4.
Figure 29: Multi Mode Wiring
Installation | 28
Options and Accessories
Note:
For installation of options and accessories follow the instructions that are provided
with them.
Built On or Remote Blower Pack
Built on and remote blower packs are available for the NHTC/PC for applications where steam
for humidification must be introduced directly into the space being humidified. For instructions
on installing the remote blower pack refer to the installation instructions supplied with it. The
steam line and condensate return instructions provided in this manual are also applicable to
remote mounted blower packs.
Blower Pack
Steam Line
Condensate Drain
“P” Trap
Figure 30: Remote Mounted Blower Pack
Installation of an NHTC/PC with a built on blower pack is identical to installation of an NHTC/PC
without a blower pack. The steam line, condensate return and wiring connections to the blower
pack have been done at the factory.
Fill Cup Extension
For installations where duct static pressure exceeds 6 inches a fill cup extension kit is required.
The provides a bracket and hoses for mounting the fill cup above the humidifier. The fill cup
extension kit may be required if water runs to drain while the humidifier is filling. See chapter
on troubleshooting for more information on diagnosing fill problems.
29 | Installation
Drain Water Cooling
For installations where drain water must be cooler than 140ºF (60ºC) a kit is available which
consists of a double fill valve. The second fill valve adds additional water to the fill cup while
the humidifier is draining to cool the water more than the single fill valve.
Drain Water Cooling (External)
Pneumatic and electric drain water coolers are available from Nortec for installation outside the
humidifier or on condensate drains from steam traps, distributors, and SAMe headers. If
condensate cannot be routed back to the humidifier tank via the humidifier’s fill cup then an
external drain water cooler may be required to meet regulations restricting the temperature of
hot water that can be fed to drain. The external drain water cooler is only available for field
installation.
Foam Protection
NORTEC’s NHTC/PC includes software detection of foaming which in most cases should be
sufficient to address waters which can cause foaming. For more severe cases an optional foam
prevention kit is available. The kit consists of an external float chamber, steam outlet , hose
and fittings required for installation. The kit can be factory or field installed.
Internal Fusing
An optional internal fusing kit is available for all models of NHTC/PC. The kit provides extra
internal protection to the humidifier and must always be used in conjunction with an external
fused disconnect. The Internal fusing option is only available as a factory installed option.
Remote Fault Indication
An optional remote fault kit is available that can provide remote indication of humidifier status.
The kit can be factory or field installed. See also Remote Fault Option Wiring on page 27 for
more information about the remote fault indication kit.
Outdoor Model
The outdoor model of the NHTC performs in the same way as the indoor model except as noted
in the manual addendum that is supplied with it. Refer to additional installation instructions for
the outdoor model in the addendum.
Installation | 30
Start Up
32 Installation Check
33 NHTC/PC User Interface
33
Manual Drain Switch
33
Door Interlock Switch
34
35
36
38
38
38
39
40
31 | Start Up
Start Up Procedure
Status Screens
NORTEC Digital Controls
Multi Mode
NORTEC LINKS 2
NORTEC ONLINE
NHTC/PC Pre-Start Up Checklist
NHTC/PC Start Up Checklist
Installation Check
Before turning on power to the NHTC, inspect the installation to insure that it was carried out
correctly. Refer to Figure 31: Installation Check, to the NHTC/PC Pre-Start Up Checklist on page
39, and to the chapter on Installation that starts on page 9.
Min 10 ft (3 m)
2 x duct height
from fan or
transition
Calculated absorption distance
to any obstruction or 8 - 10 ft
(2.4 - 3 m) if unknown.
On/Off Controls
(Air Proving)
in series between
terminal 1 and 2
- Adequate slope
- No restrictions
- No kinks (hose)
- Condensate traps
on long runs
Fused
Disconnect
Correct
voltage /
amps / phase
per spec label.
Mounting
- Unit level
- Screws into
structural member
- L Bracket on top
Spec label
P Trap with 12 in .
(30 cm) min. drop
.
Air gap
High Limit
- Wired to terminal 5
- On/Off in series
between terminal
1 and 2
Control
- Wired to terminal 4.
- On/Off in series between
terminal 1 and 2.
- In return duct or location
which represents humidified
space (no drafts, not by
door, not by diffuser).
1/2 in line min
30-80 PSI
Not plastic drain,
Not to sink.
Figure 31: Installation Check
Start Up | 32
NHTC/PC User Interface
LCD Display and
Input Buttons
(Buttons used to navigate
status screens and
configure the humidifier,
correspond to icons on
the display)
Status LEDs
Software Drain Button
(Initiates a software
controlled drain)
Door Interlock Switch
(prevents contactor from
engaging when door is open
NOTE: Pull out with door off
to override.
On/Off Switch
(Turns humidifier On/Off)
Manual Drain Switch
(Can be used to drain
cylinder without software)
Figure 32: NHTC/PC User Interface
Manual Drain Switch
In addition to software controlled draining of the cylinder the NHTC/PC has a manual drain
switch which can be used to drain the cylinder even if software is not functioning. To drain the
cylinder put the switch into the drain position. For normal operation the switch should be in the
off position.
Door Interlock Switch
The door interlock switch cuts power to the contactor when the door is removed. It is an
additional safety device intended to prevent the possibility of service technicians coming into
contact with live electrical wiring while working on the humidifier. Pull the switch out with door
off to override.
Caution: Power to the humidifier should always be turned off using the dedicated
external disconnect before removing the door or side panel, or before doing any
service work on the humidifier.
33 | Start Up
Start Up Procedure
1 Examine the humidifier and installation for damage and or improper installation.
Warning: Damaged units or improperly installed units must not be operated. Damaged or
improperly installed units may present a danger to persons and property.
2
3
4
5
Ensure that the door is in place and secured with its retaining screw.
Open the supply water shut off valve.
Turn on the mains power using the installed disconnect.
Turn the On/Off switch on the front of the humidifier to On.
Request – xx%
Idle
0 lb/hr
04/30/09 14:25:22
Security loop: Closed
Menu
The LCD display will illuminate and the humidifier will perform a
self-diagnostic sequence during which the LED’s and internal
components will be momentarily activated.
If an error is detected during the self-diagnostic sequence a Fault
will be displayed. See troubleshooting section for information on
diagnosing and correcting faults.
After the system test the humidifier is in normal operation mode.
Note: NHTC display shown. The information on the LCD depends on the configuration of the
NHTC/PC and the actual operating conditions. It may vary from the display shown.
6 If On/Off or a control humidistats have been installed check and adjust the control setpoint
on the control and high limit humidistat (see NORTEC Digital Controls on page 36). If
transducer controls have been installed then adjust the humidity setpoint using the keypad
and display (see Set P on page 53)
7 When either the external humidistat or internal controller generate a demand for humidity
higher than 20% and the security loop is closed the main contactor will engage, the fill valve
will activate (after a delay) and the cylinder will slowly fill with water.
Note: While the cylinder is filling with water there should be no water flowing down the drain. If
water is flowing down the drain it can indicate excessive backpressure or a leaking drain
valve. See General Troubleshooting on page 69.
8 It can take 15 – 20 minutes or longer for a large humidifier to fill, for the water to be heated
up by the submerged electrodes and for steam to be produced.
Request – 100%
NHPC 30
Humidifying
30 lb/hr
04/30/09 14:30:29
Security loop: Closed
Menu
Status Humidifying
Menu
NHTC Display
NHPC Display
The green humidifying LED on the
front of the humidifier will light up
and the display will indicated
“Humidifying” and the amount of
steam being produced (NHTC only)
as soon as the electrodes are
submerged and drawing current.
Note: If operated on low conductivity water it may take several hours for the NHTC/PC to
reach full output capacity. This is normal. During this time the humidifier will periodically
indicate high water level, not perform any drains and will concentrate the cylinder water.
Start Up | 34
Status Screens
In addition to the main status screen the NHTC/PC includes several status screens which
provide additional information about the humidifier. The additional screens can be reached by
pressing the buttons corresponding to the left and right arrow key on the LCD display.
Note:: NHTC status screens are shown below. The NHPC has similar status screens
but with less detailed information. NHPC screens show only software version, output,
demand, capacity limit, and control type. The NHPC does not have a trend graph.
Request – xx%
Idle
04/30/09
Security loop:
0 lb/hr
14:25:22
Closed
Main Status Screen
This screen reports the current request for humidity, status,
output, date and time, and security loop status. If status is not
idle or humidifying the left arrow key becomes a “?”. If the button
corresponding to the arrow key is pressed the display will give
additional information on the status of the humidifier.
Menu
CONTROL
Output
Man Cap.
Ch1 Dem
Ch2 Dem
: 0 lb/hr
: 100%
: 55%
: 100%
Menu
CONTROL
Output
Man Cap.
RH Ch1
CNT Set-Pt
RH Ch2
CNT Set-Pt
: 0 lb/hr
: 100%
: 55%
: 50%
: 100%
: 70%
Menu
Control Information Screen
Output is the lb/hr steam output of
the unit. Man Cap is the user
configured capacity limitation.
Depending on the control
configuration the screen also reports
the current inputs of channel 1 and
2. If the unit is configured for
internal control it also provides the
current humidity and setpoints.
Caution:
 Improper control configuration can result in over humidifying which can result in
damage to property.
 See Advanced Control Configuration if the controls displayed in the control
information screen do not match those connected to the humidifier.
HUMIDIFIER
Model
Capacity
REG Mode
Software
: NHTC
: 30 lb/hr
: Demand
: XVXX
Menu
CYLINDER
Cyl Number
Cyl Type
Capacity
Fac. Date
Run Time
Status
Menu
35 | Start Up
HUMIDIFIER
Model
Capacity
REG Mode
Software
: NHTC
: 30 lb/hr
: RH (PI)
: XVXX
Humidifier Information Screen
Model is the humidifier model type.
Capacity is the maximum output.
REG Mode is the configured control
method. Software is the installed
software version.
Menu
: 421
: Disposable
: 30 lb/hr
: 10/10/06
: 657h
: Good
Cylinder Information
Cyl number is the model number of the cylinder.
Cyl Type identifies it is a disposable cylinder.
Capacity shows the cylinders maximum capacity.
Fac. Date is the date the cylinder was manufactured.
Run Time is the cylinders operational hours.
Status indicates if the cylinder is good or spent. Replace if spent!
Functionality
Idle Mode
3DD Force
Ground Fl
Rapid Modu
Short Cyc
Foam Mode
: Idle Only
: Off
: Off
: Off
: Off
: Off
Functionality Information
Indicates the configuration of user configurable settings. For
definitions see Controls Configuration.
Menu
100%
0%
-4 hrs
0 hrs
Trend Graph
This graph provides a history of the humidifiers output for the past
4 hours. It displays a percentage of full output which corresponds
to the demand signal. The current demand signal is displayed at
the bottom of the screen.
Demand: 45%
Menu
NORTEC Digital Controls
NORTEC provides optional On/Off, Modulating Control, or Transducer digital controls. Figure 31
and 32 show the function and meaning of the Digital Control’s display and buttons. All controls
are available either wall mounted or with a remote sensor for duct mounting.
Humidity (RH %)
Indicates the
humidistat is on.
A half moon
indicates it is off.
Snowflake indicates the
setpoint is being
overridden by outdoor
temperature.
Power button turns
off the humidiistat if
pressed for 2 seconds
Output signal is shown on
modulating controller
proportional to the demand.
State of On/Off humidistat
Setpoint (RH%)
Option button accesses
sensor calibration.
See troubleshooting
Increase / Decrease Setpoint
Figure 33: Modulating and On/Off Digital Control Operation
Start Up | 36
Modulating Control
The modulating controls use a PI control algorithm to transmit a 0-10V control signal to the
humidifier. Adjust the setpoint to the desired setting by using the up/down arrow buttons on
the controller.
On/Off Control
The On/Off controls use a PI control algorithm to open and close a relay that opens and closes
the humidifier’s On/Off loop. Adjust the setpoint to the desired setting by using the up/down
arrow buttons on the controller.
Transducer Control
The transducer controls transmit a 2-10V control signal proportional to the sensed relative
humidity to the humidifier. Humidity setpoint is not set at the transducer. The setpoint is set on
the NHTC/PC’s display and keypad.
Note: It is possible to field calibrate NORTEC Digital controls if the displayed humidity is found
to be different than a known trusted source. See Digital Humidistat on page 71 of
chapter on Troubleshooting.
Humidity (RH %)
Option button accesses
sensor calibration.
See troubleshooting
Adjust calibration
while in calibration
mode
Power button will
display “NO” if an
attempt is made to
turn off the transducer.
Figure 34: Transducer Control Operation
37 | Start Up
Multi Mode (NHTC Only)
Start up of each humidifier configured and installed for multi mode operation is the same as
starting up standalone humidifiers with the exception that for the humidifier to fill and produce
steam the demand to the master unit must be greater than the Multi Unit Op. Range setting of
the unit being started. (Example for a slave unit configured to operate between 20 and 30% the
demand to the master must be greater than 22%)
Each unit connected in a multi mode system will display its demand as a percentage of the
range for which it is configured. Example, a slave unit configured to operate between 20 and
30% demand will display a demand of 50% when demand to the master is 25%.
Note: See Multi Unit Op. Range on page 54 for software configuration, and Multi Mode Wiring
on page 28 for wiring of humidifiers in a multi mode system.
NORTEC LINKS 2 (NHTC Only)
NORTEC LINKS 2 is an option that can be integrated with the NHTC. It allows a Building
Management System to monitor and / or control the humidifier. For complete information about
NORTEC LINKS 2 and its operation and configuration, go to www.humidity.com and look up the
NORTEC LINKS 2 manual.
NORTEC ONLINE (NHTC Only)
NORTEC ONLINE is an option that can be integrated with the NHTC. It allows a user to log onto
the Internet, go to www.norteconline.com and log in to allow them to monitor their unit from any
computer with an internet connection. It can also be configured to send service reminders and
fault warnings when they occur.
Start Up | 38
NHTC/PC Pre-Start Up Checklist
Unit Serial #: _________________ Tag: _______________
Unit type: _______ __________
Voltage: ________V/_____ph Steam output: ______lb/hr
Cylinder type:
Customer/Job:
Address:
Water Quality:
 Well water  City water  Softened water 
Humidifier Mounting: (Clearances around the unit Acceptable Obstruction)
 Level  Front/Side Clearance 
Steam Line(s):
 Slope up (min 2 in/ft). 
 Diameter / Size
 Low point condensate traps 
 Type of Insulation
Slope down (min 0.500 in/ft) 
Material
No Hose Kinks / Restrictions 
Condensate Line(s):
 P Trap min 6 in or duct press + 2in 
P Trap min 12 in drop 
Water Line:
 1/2 in to within 4ft of unit 
Water pressure: 30-80 psig 
Drain Line:
 Air gap within 3 ft of the unit 
Diameter / Size
Cylinder:
 Seated in drain valve and secured
yes 
no 
Wiring:
 Wiring connections and connectors secured
yes 
no 
Controls:
 Control Location
 High Limit Location
Power:
 Voltage, amp, fuse per Spec Label:
 Disconnect switch located close to humidifier
 Panel Number
Inspected by:
Company:
39 | Start Up
Control to Terminal 4 
High Limit to terminal 5 
yes 
yes 
no 
no 
Date of inspection: ______/_______/______
NHTC/PC Start Up Checklist
Unit Serial #: _________________
Tag: _______________
Unit type: _______ __________
Voltage: ______V/____ph
Cylinder Type:
Customer/Job:
Preliminary:
 Pre-start-up checklist completed?
Steam output: ______ lb/hr
Address:
yes 
no 
If no, perform Pre-Start-up Checklist before starting humidifier.
Start-Up Procedure:
The prerequisites for the humidifier filling and contactor pulling in to make steam are as follows:





Door in Place and secured with screw
Water supply valve opened
Mains disconnect switched on
Turn On/Off switch on
On/Off Security loop (Terminal 1 and 2) closed.
Controls:
 Installed Controls Match Configuration
 Control Setpoint:
 Demand (Modulating Humidistat)
or
 Sensed RH < Setpoint (Transducer)
yes 
yes 
yes 
yes 
yes 
no 
no 
no 
no 
no 
yes 
no 
High Limit Setpoint:
yes 
no 
yes 
no 
The Humidifier will undergo a self-test when the power is turned on activating the LED’s and other
internal components.
If the above listed prerequisites are fulfilled the humidifier will start filling the cylinder and begin
normal operation.
Note: Most water does not contain enough conductivity for full boil on initial start-up. Units
will need to concentrate the water over a time period (hours to days). It is normal for
W12 Sensor on warning indicating water level is at the top of the cylinder to be
displayed during this time period.
Remarks:
Started by:
Date of Start Up: _______/_______/______
Company:
Start Up | 40
Operation
42
42
3
4
44
LED Status Lights
Common Warnings
Humidifier Components
Description of Components
How the Humidifier Works
44
Steam Generation
44
Drains
44
Steam Distribution
45 Selecting an RH Setpoint
47 NHTC Humidifier Configuration
47
Navigating the NHTC Software
47
Main Menu (NHTC Password)
48
Service Level
48
User Defined Settings
52
Control Setting
53
Setting
54
Multi Unit Op. Range
55
Diagnostic Menu
57 NHPC Humidifier Configuration
41 | Operation
57
Navigating the NHPC
57
Main Menu (NHPC Password)
LED Status Lights
The keypad and display panel includes 3 LED’s which provide information about the humidifier’s
current status.
Fault LED On
Indicates the controller has detected a
fault condition and stopped humidifier.
Check display for fault information.
Service LED On
Indicates that service may be required
or that the water level is high. Check
display for warning information.
Service LED Blinking
Indicates drain button has been pushed
and unit is draining.
ON LED On
Indicates steam is being produced.
ON LED Blinking
Indicates demand with safety loop open.
Figure 35: LED Status Lights
Common Warnings
The following two warnings are common during normal operation and do not normally indicate
that service is required. For a new cylinder the Sensor On warning indicates that full capacity
cannot be reached because cylinder water is not concentrated. For an old cylinder the Sensor
On warning may be an indication that the cylinder will soon have to be replaced.
W12: Sensor On
The above warning is normal during the start and end of a cylinder’s life. It indicates that
the high water sensor has interrupted filling of the cylinder. It is displayed for information
only and unless it persists for an extended period of time it does not require any action.
W11: Safety Loop Open
The above warning is normal during operation. It indicates that an On/Off humidistat or
one of the security loop devices connected between control terminal 1 and 2 is open. It
is displayed for information only and does not require any action.
Operation | 42
Humidifier Schematic
Steam Line
Steam Distributor
Condensate Return
Fill Cup
Control Board
Cylinder
Overflow
Current Sensor
High
Water
Sensor
Electrodes
Fill Valve
Drain Valve
Internal Air
Gap
External Air
Gap
Air Gap
Figure 36: Humidifier Schematic
43 | Operation
How the Humidifier Works
The NHTC/PC is an atmospheric steam generator that uses heat generated by electrical current
flowing between submerged electrodes to generate heat and steam. The NHTC/PC is designed
for air humidification via steam distributor, blower pack, or steam manifold (SAM-e).
Steam Generation
 Once the unit receives a demand signal, the door interlock switch is closed, and the safety
loop between terminal 1 and 2 is closed the humidifier closes the contactor and measures
the current.
 If the demand is lower than the actual output the inlet valve is kept closed and output is
reduced by letting the water level in the cylinder decrease by evaporation.
 If demand is higher than the actual output after a brief delay the fill valve is activated and
water flows into the fill cup. Water from the fill cup flows into the bottom of the cylinder
through a hose connected to the drain valve housing.
Note: The cylinder is gravity fed from the fill cup. If backpressure from the steam line is too
high it will cause water to back up in the fill cup and flow down the overflow line to the
drain.
 ·As soon as the water in the cylinder comes in contact with the energized electrodes current
flows through the water. The resistance of the water to the electrical current heats the
water and turns it to steam. The more electrode is covered by water the higher is the
current and output. The unit continues to fill until the current matches demand or the high
water sensor detects a high water level.
 The NHTC/PC repeats the fill and boil down cycle repeatedly to match output to demand.
 Over time minerals in the water will adhere to the cylinder’s electrodes. The humidifier will
automatically fill to a higher water level to maintain full capacity during the life of the
cylinder. Eventually because of scale formation it will no longer be possible for the
humidifier to reach its full capacity. The NHTC/PC’s software monitors this condition and will
display a warning when the cylinder needs to be replaced.
Drains
 As steam is produced minerals are left behind increasing the conductivity of the water. The
NHTC/PC’s patented auto adaptive cycle will monitor the water conductivity and perform
drains to maintain the water at optimal conductivity for peak performance.
 The auto adaptive cycle provides the longest cylinder life in combination with keeping the
tightest control and most efficient use of water during the entire cylinder life.
Steam Distribution
Steam generated by the humidifier may be introduced into the air in several different ways. The
most common method for adding the steam into the air is to mount a steam distributor tube in
a supply air duct as shown in Figure 36: Humidifier Schematic. For larger ducts or larger loads it
is also common to use a steam manifold with a single steam line connection and multiple tubes
for distributing the steam, see Figure 37: SAM-e Manifold. For introducing steam directly into a
room, humidifier mounted or remote mounted blower packs are used see Figure 38: Remote
Blower Pack.
Operation | 44
Steam Line
The steam line between the cylinder steam outlet and the distributor may be NORTEC steam
hose, copper pipe, or stainless steel pipe or tube. The NHTC/PC is an atmospheric steam
generator so it is very important no restrictions are present in the steam line and that the steam
line is sized properly to carry the full output capacity of the humidifier. It is also important to
minimize the length of steam lines. See Steam Lines and Condensate Returns on page 14 for
information on selecting steam lines and maximum recommended lengths.
Whenever steam is distributed condensate is formed in the distribution system and steam
distributor, manifold, or blower pack. Insulating steam lines is one important way to reduce the
amount of condensate formed. Steam lines must be sloped so that condensate does not collect
in the lines and create a restriction to steam flow.
Condensate Return
The condensate must be collected and removed from the system so that it does not build up
and leak into the duct (or room if blower pack is used). Condensate can be returned to the
NHTC/PC fill cup to reduce water waste or can be fed to drain.
Selecting an RH Setpoint
The optimum humidity setpoint depends on the reasons that a space is being humidified. The
“ASHRAE Handbook – HVAC Applications” recommends specific design relative humidities for
specific applications. See also NORTEC publication “When You Need Humidity” (Form 124A)
for more information on humidity settings.
Health and Comfort - The benefit of humidity is most pronounced for health and comfort in the
40-60% range. A humidity setting of 40-50 % is recommended for this purpose to prevent over
humidifying.
Note: The job site design may have specified a setpoint chosen specifically for the
site. Refer to site documentation and where possible use setpoints specifically
determined for the site.
Temperature Setback - In cold climates it is often necessary to reduce the humidity level in a
space to prevent build up of condensation on the inside of exterior walls, windows, and trim. It
is highly recommended that the temperature setback function of the NORTEC digital controls be
used under these conditions to prevent damage from condensation. The digital control with an
outdoor temperature sensor installed will automatically setback the humidity setpoint to
correspond with outdoor temperature.
Duct High Limit – The duct high limit is intended to prevent saturation and wetting in duct work
at high load conditions. NORTEC recommends a setting of 85% for the duct high limit. It may
be necessary to reduce this setting If the duct work is very cold or in contact with exterior cold
surfaces.
45 | Operation
Steam Line
SAM-e Manifold
Condensate Drain
“P” Trap
Figure 37: SAM-e Manifold
Blower Pack
Steam Line
Condensate Drain
“P” Trap
Figure 38: Remote Blower Pack
Operation | 46
NHTC Humidifier Configuration
Navigating the NHTC Software
The four input buttons below the digital display are used to navigate in the NHTC’s software and
to enter values. The function of the four buttons changes depending on what is being displayed
on the screen. In all cases 4 icons representing the functions of the buttons are shown at the
bottom of the screen.
Screen Displays
Screen Displays
Set P
45%
Request – 100%
Idle
04/30/09
Security loop :
Menu
Press to go
down a
menu level
45%
45 %
30 lb/hr
14:25:22
Closed
?/A/B
Press to
go left
/right one
screen
?=Press for
information
A or B = cylinder
of double unit,
press to display
other cylinders info.
ESC
Press to go
up a menu
level
Set
Press to
increase/
decrease
value
Press to
accept
setting and
go up a
level
Figure 39: Navigating the NHTC/PC Software
Main Menu (NHTC Password)
The menu levels of the NHTCare password protected to prevent configuration changes by
unauthorized persons. In order to access the menu level press the button corresponding to the
Menu icon and when prompted enter the password 0335.
Request – 100%
Password
03355
Idle
04/30/09
Security loop :
30 lb/hr
14:25:22
Closed
Menu
?
Main Menu
Service Level
User Defined Settings
Control Settings
Diagnostic Menu
Menu
47 | Operation
Set
Enter Code
Confirm with Set
Menu
Set
Enter Password
Press the Menu button from any
status screen. Enter the user
level code 0335 using the up
arrow to change the value of each
digit and the right arrow to move
to the next digit. Press the Set
button.
Main Menu
From here you can access all user
configurable settings. Select any
sub-menu by using the up/down
arrow buttons and pressing Set
when the desired one is
highlighted.
Note: Do not make changes
unless you are familiar with the
software.
Service Level
The selections in the Service Level allow you to reset service reminders and the fault history.
Press Set while highlighting Service Level in the Main Menu.
Service Level
Reset Error History
Reset Service History
Reset
ResetCylinder
Cylinder
Reset Cylinder
without replacing it
Is dangerous !!!
Still Reset Cyl ?
Menu
Set
Service Level
Reset
ResetError
ErrorHistory
History
Reset Service History
Reset Cylinder
Menu
Yes
No
Set
Reset Error History
are you sure ?
Set
Service Level
Reset Error History
Reset
ResetService
ServiceHistory
History
Reset Cylinder
Menu
Menu
Menu
Yes
No
Set
Menu
Yes
No
Reset Error History
Deletes the list of errors stored in
the error history. The Error
History is located in the
Diagnostics Menu. Resetting the
error history is not normally
required, but can be done after
repairs to remove faults that are
no longer needed.
Reset Service History
Deletes the historical list of
service reminders. The Service
History can be found in the
Diagnostics Menu.
Reset Service History
are you sure ?
Set
Reset Cylinder
The humidifier uses information
about cylinder replacement to
optimize the performance of the
humidifier. Only after replacing a
cylinder select Reset Cylinder,
and then press the Yes button.
Set
User Defined Settings
The selections in User Defined Settings allow you to configure most user configurable features
available with the NHTC. Press Set while highlighting User Defined Settings in the Main Menu.
User Defined Settings
Multi
::Standalone
Master
MultiMode
Mode
Drain Cool
: On
Dfactor
: 1.0
Foam Mode
: Off
Rapid Modu
: Off
ShortCyc
: Off
Menu
Set
Multi Mode
Master
Standalone
Master
Slave
Menu
Set
Multi Mode
Use Multi Mode to configure the
humidifier to operate as one
humidifier of a group controlled
by a single control signal /
transducer signal. See Multi Unit
Op. Range later in this section.
(Default = Standalone)
Operation | 48
(User Defined Settings Continued)
User Defined Settings
Multi Mode
:Standalone
Double
: Parallel
DoubleMode
Mode
Drain Cool
: On
Dfactor
: 1.0
Foam Mode
: Off
Rapid Modu
: Off
Menu
Set
User Defined Settings
Multi Mode
:Standalone
Drain
: On
DrainCool
Cool
Dfactor
: 1.0
Foam Mode
: Off
Rapid Modu
: Off
ShortCyc
: Off
Menu
Set
User Defined Settings
Multi Mode
:Standalone
Drain Cool
: On
Dfactor
: 1.0
Dfactor
Foam Mode
: Off
Rapid Modu
: Off
ShortCyc
: Off
Menu
Set
User Defined Settings
Multi Mode
:Standalone
Drain Cool
: On
Dfactor
: 1.0
Foam
: Off
FoamMode
Mode
Rapid Modu
: Off
ShortCyc
: Off
Menu
Set
Double Mode (NHTC 150-200 only)
Double Mode
Parallel
Parallel
Sequenced
Independent
Menu
Set
Drain Cool
When On the fill valve is activated
at any time that the drain valve is
activated to cool the drain water.
(Default = On)
Drain Cool
On
Off
On
Menu
Set
DFactor
1.0
1.0
Menu
Set
Foam Mode
Off
Off
Basic
Advanced
Menu
Set
49 | Operation
Foam Mode
These settings can be used to
detect foaming in the cylinder and
take corrective action. Basic is a
software only setting. Advanced
requires installation of a
hardware kit. (Default = Off,
Default with Kit = Advanced)
Set
User Defined Settings
Multi Mode
:Standalone
Drain Cool
: On
Dfactor
: 1.0
Foam Mode
: Off
Rapid Modu
: Off
ShortCyc
: Off
ShortCyc
Menu
Dfactor
Increases or decreases the drain
time used to control cylinder
water conductivity. It should not
normally need to be adjusted. A
NORTEC representative will
provide instructions if it should
need o be adjusted. (Default =
1.0)
Rapid Modu
Reserved for future development.
Do not adjust. (Default = Off)
User Defined Settings
Multi Mode
:Standalone
Drain Cool
: On
Dfactor
: 1.0
Foam Mode
: Off
Rapid
: Off
RapidModu
Modu
ShortCyc
: Off
Menu
Parallel = cylinders operate in
parallel from one set of control
signals. Sequenced = cylinders
operate in sequence from one set
of control signals. Independent =
two sets of controls signals and
each cylinder follows one of the
sets.
Set
ShortCyc
Off
Off
On
Menu
Set
ShortCyc
When On the software will detect
short On/Off cycles that could
prevent proper draining to control
cylinder conductivity. It will
reduce output of the unit if short
cycling is detected. (Default =
Off).
(User Defined Settings Continued)
User Defined Settings
Drain Cool
: On
Dfactor
: 1.0
Foam Mode
: Off
Rapid Modu
: Off
ShortCyc
: Off
Ground
: Off
GroundFI
FI
Menu
Set
User Defined Settings
Dfactor
: 1.0
Foam Mode
: Off
Rapid Modu
: Off
ShortCyc
: Off
Ground FI
: Off
Fill
FillStop
Stop
: Off
Menu
Ground FI
When on the contactor will be
disengaged whenever the drain
valve is activated to prevent
current leakage to the drain.
(Default = Off).
Ground FI
Off
Off
On
Menu
Set
Fill Stop
Off
Off
On
Set
Menu
Set
Adapting
Reserved for future development.
Do not adjust. (Default = Off)
User Defined Settings
Foam Mode
: Off
Rapid Modu
: Off
ShortCyc
: Off
Ground FI
: Off
Fill Stop
: Off
Adapting
: Off
Adapting
Menu
Set
User Defined Settings
Rapid Modu
: Off
ShortCyc
: Off
Ground FI
: Off
Fill Stop
: Off
Adapting
: Off
Idle Mode
: Idle Only
Menu
Set
User Defined Settings
ShortCyc
: Off
Ground FI
: Off
Fill Stop
: Off
Adapting
: Off
Idle Mode
: Idle Only
3DD
: Off
3DDForce
Force
Menu
Set
User Defined Settings
Ground FI
: Off
Fill Stop
: Off
Adapting
: Off
Idle Mode
: Idle Only
3DD Force
: Off
Drain Mode
: Fixed ED
Menu
Fill Stop
When activated during a fill cycle
the fill valve will be turned off
when current equals 95% of
demand to prevent overshooting
the demand. (Default = Off).
Set
Idle Mode
Idle Only
Idle Only
3 Day Drain
Keep Warm
Menu
Set
3DD Force
Off
Off
On
Menu
Set
Drain Mode
Fixed ED
Fixed ED
Ed
Float ED
Menu
Set
Idle Mode
Configures operation when no
demand is present. Idle Only =
no action. 3 Day Drain = drain
cylinder after 72 hours. Keep
Warm = keep cylinder warm by
periodically engaging contactor.
(Default = 3 Day Drain).
3DD Force
When On the humidifier will drain
the contents of the cylinder every
3 days regardless of demand or
idle condition. It can improve
performance for water conditions
with sediment or other
contaminants. (Default = Off)
Drain Mode
Configures when a corrective
drain will be performed in case
the software detects excess
current. Fixed ED = drain at
115% of full capacity. Float ED =
drain at 115% of current demand.
(Default = Fixed ED).
Operation | 50
(User Defined Settings Continued)
User Defined Settings
Fill Stop
: Off
Adapting
: Off
Idle Mode
: Idle Only
3DD Force
: Off
Drain Mode
: Fixed ED
Overcurr
: 0.00
Menu
Set
User Defined Settings
Adapting
: Off
Idle Mode
: Idle Only
3DD Force
: Off
Drain Mode
: Fixed ED
Overcurr
: 0.00
Date
: 04/28/09
Menu
Set
User Defined Settings
Idle Mode
: Idle Only
3DD Force
: Off
Drain Mode
: Fixed ED
Overcurr
: 0.00
Date
: 04/28/09
Time
: 13:49
Menu
Set
User Defined Settings
3DD Force
: Off
Drain Mode
: Fixed ED
Overcurr
: 0.00
Date
: 04/28/09
Time
: 13:49
Unit
: Lb/hr
Menu
Set
User Defined Settings
Drain Mode
: Fixed ED
Overcurr
: 0.00
Date
: 04/28/09
Time
: 13:49
Unit
: Lb/hr
Language
: English
Menu
51 | Operation
Set
Overcurr
Adjust only if instructed by
NORTEC Representative. (Default
= 0.00)
Overcurr
0.00
0.00
Menu
Set
Date
04 /28/09
04
04/28/09
Menu
Set
Time
13 :49
13
13:49
Menu
Set
Unit
Lb /hr
Kg/hr
Lb/hr
Menu
Set
Language
English
English
French
Menu
Set
Date
Sets the date. Highlight
month/day/year and use the up
arrow button to change the value
and the right arrow button to
move to the next field. Press Set
when correct to save changes.
Time
Sets the time of day. Highlight
hour / minutes. Use the up arrow
button to change the value and
the right arrow button to move to
the next field. Press Set when
correct to save changes.
Unit
Set the units in which the
humidifier will display output.
Highlight the desired units using
the up/down arrow buttons and
press Set to save setting.
Language
Sets the language in which the
humidifier will display
information. Highlight the desired
language using the up/down
arrow buttons and press Set
when correct to save changes.
Control Setting
Control Settings allow you to set the type of external controls the humidifier is connected to. In
most cases the NHTC humidifier is factory configured to operate with the external controls that
were specified for the site. Press Set while highlighting Control Settings in the Main Menu.
CAUTION: Improper control configuration can result in over humidifying which can result
in damage to property.
Control Setting
Source
Source
REG Mode
MOD Mode
CNT Type
Setting
Menu
Control Setting
Source
REG
REGMode
Mode
MOD Mode
CNT Type
Setting
Menu
Control Setting
Source
REG Mode
MOD
MODMode
Mode
CNT Type
Setting
Menu
Control Setting
Source
REG Mode
MOD Mode
CNT
CNTType
Type
Setting
Menu
: Analog
: Demand
: Single CH
: 0-10 V
Set
: Analog
: Demand
: Single CH
: 0-10 V
Set
: Analog
: Demand
: Single CH
: 0-10 V
Set
: Analog
: Demand
: Single CH
: 0-10
0-10VV
Set
Source
Analog
Analog
Digital
Menu
Set
REG Mode
Demand
Demand
On/Off
RH (P)
RH (PI)
Menu
Set
MOD Mode
Single CH
SingleCH
CH
Single
Dual CH
Menu
Set
REG Mode
Configures the type of control
used with the humidifier. RH (P)
is proportional only internal
control based on a transducer
signal. RH (PI) is proportional
control with an integral.
MOD Mode
Configures the humidifier to
either operate with a single
channel (control only) or dual
channel (control and high limit).
If an On/Off high limit humidistat
is used set MOD Mode to Single
CH.
CNT Type
Configures the Volt or amp range
of the control signal connected to
the humidifier.
CNT Type
0-10 V
0-5 V
1-5 V
0-10
V
0-10V
2-10 V
0-16 V
32-16 V
0-20 mA
4-20 mA
Menu
Source
Configures the humidifier to
either accept analog control
signals from a humidistat or
digital signals from a Building
Management System.
Set
Operation | 52
Setting
The Setting submenu is used to set a manual capacity limit. It is also used to adjust setpoint,
the proportional band, and the integral time if REG Mode is set to RH (P) or RH (PI) and wired to
humidity sensors. Access the Setting submenu by pressing the menu key while Setting is
highlighted in the Control Settings menu.
Control Settings
Source
REG Mode
MOD Mode
CNT Type
Setting
Setting
Menu
: Analog
: Demand
: Single CH
: 0-10 V
Set
Setting
Manual
Manual Cap
Cap
Set P
Prop Band
Int Time
Menu
: 100%
: 45%
: 16%
: 8 min
Set
Setting
Manual
Manual Cap
Cap
Set P
Prop Band
Int Time
Menu
: 100%
: 45%
: 16%
: 8 min
Set
Manual Capacity
100 %
100
%
100%
Menu
Set
Setting
Accesses a submenu whose
primary purpose is applying a
manual capacity override and (for
units with transducer controls)
configuring a setpoint.
Manual Cap
Reduces the maximum capacity
of the humidifier to a percentage
of its full capacity. Use up/down
buttons to increase/decrease and
press Set to save the setting.
Note: Set P, Prop Band, and Int Time will only be displayed in the menu if REG Mode is
set to RH (P) or RH (PI).
Setting
Manual Cap
Set
SetPP
Prop Band
Int Time
Menu
Setting
Manual Cap
Set P
PropBand
Band
Prop
Int Time
Menu
53 | Operation
: 100%
: 45%
: 16%
: 8 min
Set
: 100%
: 45%
: 16%
: 8 min
Set
Set P
Sets the humidity setpoint value.
The humidifier will attempt to
maintain this humidity level in the
space where the control
transducer is installed.
Set P
45%
45%
45 %
Menu
Set
Prop Band
16%
16%
16%
Menu
Set
Prop Band
Prop Band should not have to be
changed under normal
conditions. The Prop Band
setting adjusts the band within
which the humidifier will
modulate between 0 and 100%
output. At set point +Prop
Band/2 the output will be 0. At
set point – Prop Band/2 the
output will be 100%.
(Setting Menu Continued)
Setting
Manual Cap
Set P
Prop Band
Int
IntTime
Time
: 100%
: 45%
: 16%
: 8 min
Menu
Set
Int Time
8 min
88 min
min
Menu
Set
Int Time
Int Time should not have to be
changed under normal
conditions. In order to correct for
error inherent in proportional
control, the controller will
increase /decrease output by
Setpoint-Actual humidity. The Int
Time adjusts the frequency at
which the correction is
performed.
Multi Unit Op. Range
The NHTC can be configured to network up to sixteen (16) humidifiers (or equivalent of 1600
lb/hr) using a master slave configuration. To operate the NHTC in multi mode;
 ·The humidifiers must be connected in parallel (daisy chained) using the linkup terminal (J2)
on the NHTC driver board (See Multi Mode Wiring on page 28).
 One humidifier must be designated the master and all others as slave units (see Multi Mode
on page 48 for software configuration). The master unit must be the unit to which external
controls / transducers and safety loop are connected.
 Each humidifier in the system including the master must have the range of demand signal in
which it will operate configured (see Multi Unit Op. Range below). Example, for four
humidifiers with equal capacity set the master to operate between 0% and 25%, set the fist
slave for 26% to 50%, set the second slave for 51% to 75%, and set the third slave for 76%
to 100%.
The Multi Unit Op. Range submenu is used to configure the humidifier’s operating range when
Multi Mode in the User Defined Settings menu is set to either Master or Slave. The menu is not
displayed if the humidifier is set to Standalone operation. Access the Multi Unit Op. Range
submenu by pressing the menu button while Multi Mode Op. Range is highlighted in the Control
Settings menu.
NOTE: The Multi Unit Op. Range submenu is only displayed if the humidifier has been
configured as either a Master or Slave. It is not displayed in Standalone mode.
Control Setting
Source
: Analog
REG Mode
: Demand
MOD Mode
: Single CH
CNT Type
: 0-10 V
Setting
Multi Unit Op . Range
Main Menu
Service Level
User Defined Settings
Control Settings
Diagnostic Menu
Menu
Set
Menu
Set
Multi Unit Op. Range
Once the humidifier has been
designated as either a master or
slave a Multi Unit Op. Range
selection will be available in the
Control Settings menu.
Operation | 54
(Multi Unit Op Range Continued)
Multi Unit Op . Range
Full Out
: 20%
Zero Out
: 0%
Full Out
Set the system demand at which
the humidifier should output its
full capacity.
Full Out
20 %
20 %
20%
Menu
Set
Multi Unit Op. Range
Full Out
: 20%
Zero Out
: 0%
Menu
Set
Zero Out
Set the system demand at which
the humidifier should shut off.
Zero Out
0%
0%
0%
Menu
Set
Menu
Set
Diagnostic Menu
The Diagnostic Menu provides a historical list of errors and service recorded by the humidifier’s
software as well as providing the ability to manually activate humidifier components for
troubleshooting purposes. Press Set while highlighting Diagnostic Menu in the Main Menu.
Diagnostic Menu
Fault History
Service History
Cylinder Info
Remote Test
Output Test
Performance
Menu
Fault History
04.14.07 21:48
03.20.09 02:35
Set
Diagnostic Menu
Fault History
Service History
Cylinder Info
Remote Test
Output Test
Performance
Menu
55 | Operation
Set
Set
Menu
Set
Cylinder Info
Displays information regarding
the cylinder which can be used by
factory technicians to help
diagnose operational issues.
Cylinder Info
0x00 : 0x01
0x01 : 0x01
0x02 : 0x01
0x03 : 0x01
0x04 : 0x01
0x05 : 0x01
Set
Menu
Fault History
Displays a list of faults which the
controller has recorded. It shows
the date and time at which the
faults occurred. Refer to Table 7:
Troubleshooting Warnings and
Faultsfor meaning of codes and
suggested actions to correct
faults.
Service History
Displays a list of cylinder service
that has been performed on the
humidifier. It displays the date
and time of service.
Service History
04.21.07 09:10
03.21.09 10:10
Diagnostic Menu
Fault History
Service History
Cylinder Info
Remote Test
Output Test
Performance
Menu
Menu
E19A
E19A
Set
(Diagnostic Menu Continued)
Diagnostic Menu
Fault History
Service History
Cylinder Info
Remote Test
Output Test
Performance
Menu
Remote Test
Steam Relay :
Off
Set
Diagnostic Menu
Fault History
Service History
Cylinder Info
Remote Test
Output Test
Performance
Menu
Set
Output Test
Inlet Valve :
Off
Set
Diagnostic Menu
Fault History
Service History
Cylinder Info
Remote Test
Output Test
Performance
Menu
Menu
Menu
Set
Enter Code
Confirm with set
Menu
Output Test
Provides a means for activating
all humidifier components (inlet
valve, drain valve, contactor etc.)
for diagnostic purposes.
Components can be activated
one at a time. Scroll to
component to be tested using
up/down buttons, press Set once
to activate, press again to turn
off.
Performance
Factory code for configuring the
humidifier. Do not enter any
values.
Performance
000000000
Set
Remote Test
Provides a means for testing of
remote fault relays to confirm
they are operating correctly.
Relays can be activated one at a
time. Scroll between relays with
up/down arrow buttons and press
Set once to turn on relay, press
again to turn it off.
Set
Operation | 56
NHPC Humidifier Configuration
Navigating the NHPC
The four input buttons below the digital display are used to navigate in the NHPC’s software and
to enter values. The function of the four buttons changes depending on what is being displayed
on the screen. In all cases 4 icons representing the functions of the buttons are shown at the
bottom of the screen.
Screen Displays
Screen Displays
Manual Cap
100%
90%
45 %
NHPC 30
STATUS: HUMIDIFY
ESC
Menu
Press to go
down a
menu level
Press to
go left
/right one
screen
No Function
Set
Press to go
up a menu
level
Press to
increase/
decrease
value
Figure 40: Navigating the NHPC Software
Press to
accept
setting and
go up a
level
Main Menu (NHPC Password)
The menu levels of the NHPC are password protected to prevent configuration changes by
unauthorized persons. In order to access the menu level press the button corresponding to the
Menu icon and when prompted enter the password 0335.
NHPC 30
Status Humidifying
Menu
?
Main Menu
Service
ServiceLevel
Level
User Defined Settings
Control Setting
Menu
57 | Operation
Set
Password
03355
Confirm with Set
Menu
Set
Enter Password
Press the Menu button from any
status screen. Enter the user
level code 0335 using the up
arrow to change the value of each
digit and the right arrow to move
to the next digit. Press the Set
button.
Main Menu
From here you can access all
NHPC submenus. Select any submenu by using the up/down
arrow buttons and pressing Set
when the desired one is
highlighted.
Note: Do not make changes
unless you are familiar with the
software.
Service Level Submenu
Service Level
Reset
ResetCylinder
Cylinder
Reset Cylinder
The humidifier uses information
about cylinder replacement to
optimize the performance of the
humidifier. Only after replacing a
cylinder select Reset Cylinder,
and then press the Yes button.
Reset Cylinder
without replacing it
Is dangerous !!!
Menu
Set
Yes
No
User Defined Settings Submenu
User Defined Settings
Dfactor
: 1.0
Dfactor
Contrast
: 50
Menu
DFactor
1.0
1.0
Set
User Defined Settings
Dfactor
: 1.0
Contrast
Contrast
: 50
50f
Menu
ESC
Set
Contrast
50
50
1.0
Set
ESC
Set
Control Setting Submenu
Control Setting
CNT
CNTType
Type
Setting
Menu
Control Settings
CNT Type
Setting
Setting
Menu
Set
Set
Manual Cap
100 %
100 %
ESC
ESC
Setting
Manual Cap
: 0-10
Set
ESC
Contrast
Increases or decreases the
contrast of the LCD display to
allow better visibility in different
lighting conditions.
CNT Type
Configures the NHPC to one of its
available control types (0-5V, 010V, 2-10V, 0-16V, 3.2-16V, 0-20
mA, 4-20 mA) (Default = 0-10V)
CNT Type
0-10
0-10
1.0
: 0-10
Dfactor
Increases or decreases the drain
time used to control cylinder
water conductivity. It should not
normally need to be adjusted. A
NORTEC representative will
provide instructions if it should
need o be adjusted. (Default =
1.0)
Set
Setting
Access the manual capacity
setting by selecting setting in
Control Settings and then
selecting Manual Cap.
:100%
Set
Manual Cap
Reduces the maximum capacity
of the humidifier to a percentage
of its full capacity. Use up/down
buttons to increase/decrease
and press Set to save the setting
Operation | 58
Maintenance and
Servicing
60 Required Maintenance
60
Cylinder Spent Warning / Fault
61
Replacement Cylinder
61
Removing the Cylinder
63
Drain Valve Cleaning
64
Installing the New Cylinder
65 Extended Shutdown
65
Starting After Extended Shutdown
66 NHTC/PC Maintenance Checklist
59 | Maintenance and Servicing
Required Maintenance
The NHTC/PC humidifier has been designed to require very little maintenance. Regular
maintenance consists of checking the humidifier to insure it is in good condition, replacing the
cylinder when the software advises that the cylinder is spent and cleaning out the drain valve
whenever the cylinder is replaced.
Cylinder Spent Warning / Fault
The steam cylinder is disposable and must be replaced at end of cylinder life. Cylinder life is
dependent on water supply conditions and humidifier usage. Failure to replace the cylinder at
the end of cylinder life will cause the unit to lock out. NORTEC is not responsible for any
damages resulting from, or attributed to, the failure to replace a spent cylinder (see
Manufacturer’s Warranty).
Request – 68%
Warning
Service LED On
+
W19 - Cylinder Spent
=
Cylinder is Spent and
must be replaced.
Humidifying
04/30/09
Security loop:
34 lb/hr
14:25:22
Closed
Menu
?
Note:
Screens shown are
for the NHTC.NHPC
screens will be different
but have the same
meaning/
+ 72 Hours
Request – 68 %
Fault
Fault LED On
+
E19 - Cylinder Spent
=
Cylinder is Spent and
must be replaced.
Humidifier has
shut down.
Fault
04/30/09
Security loop:
Menu
34 lb/hr
14:25:22
Closed
?
Warning
When the software
determines that cylinder is
spent it first displays a
warning and turns on the
yellow service LED. The
humidifier will continue to
operate for another 72
hours after the warning is
displayed.
Fault
After 72 hours the
humidifier will display a
fault and shut down.
If a replacement cylinder is
not yet available the
humidifier can be
temporarily put back into
service by turning the
humidifier off and on. The
humidifier will run for
another 72 hours.
This reset can be repeated
4 times after which the
humidifier will not run until
the cylinder is replaced and
the “Reset Cylinder”
function is entered in the
software’s service level.
Figure 41: Cylinder Spent Warning / Fault
Maintenance and Servicing | 60
Replacement Cylinder
The label on the existing cylinder identifies the cylinder type in its top left corner. When ordering
a cylinder always quote the three or five digit model number on the label, the humidifier’s serial
number and the humidifiers voltage. Serial number and voltage are located on the specification
label on the left side of the humidifier.
Steam Outlet
Secure steam hose to
outlet with hose clamp.
Electrode Pin
Connect color coded cylinder
plugs to pin with corresponding
color label. There may be 2, 3
or 6 connections depending on
cylinder.
The spring loaded plug should
fit snugly on the pin. Replace if
loose or any signs of damage.
Electrode Internal
Mounting Point
High Water Sensor Pin
Has a plastic collar
around it. Connect
orange high water
sensor wire here.
Label
Identifies cylinder type in
top left. Always replace
cylinder with the same
model.
Figure 42: NHTC/PC Cylinder
Note: NORTEC recommends keeping several replacement cylinders in stock
throughout the humidification season. This will prevent possible downtime when the
humidifier reports cylinder end of life.
61 | Maintenance and Servicing
Removing the Cylinder
Warning
 Disconnect main power at the external disconnect before any servicing.
 The plumbing and electrical compartments contain high voltage components and
wiring. Access should be limited to authorized personnel.
 Cylinder may be hot, take care when handling.
1 Drain the existing cylinder. Press and release the Drain button on the keypad. The display
will show that the manual drain is activated and the yellow service LED will blink. Let the
humidifier drain until no more water is flowing out to drain (usually not more than 10
minutes). Press the drain button again to turn off the drain valve.
2 Close supply water shut off valve.
3 Turn the humidifier On/Off switch to off.
Turn off power to the humidifier with the external disconnect.
Loosen the door screw and remove the door.
Remove the cylinder plugs from the cylinder pins by pulling vertically.
Using a flat screwdriver loosen the hose clamp where the hose is connected to the cylinder.
Using a small flat screwdriver press the tab on the cable tie holding the cylinder in place and
pull the cable tie open.
9 Tip the top of the cylinder forward to pivot it out of the steam hose. When free of steam
hose lift the cylinder out.
4
5
6
7
8
Hose Clamp
Cylinder Plug
Lift vertically
Tilt cylinder
forward to clear
hose and then
lift from drain
valve.
Drain Button
Cylinder
On/Off Switch
Door Screw
Figure 43: Cylinder Removal
Maintenance and Servicing | 62
Drain Valve Cleaning
Always clean the drain valve before installing a new cylinder. Scale from the spent cylinder may
have fallen into the drain valve and could prevent its proper operation. To properly clean the
drain valve it must be removed and disassembled.
Note: Be sure to reattach the green ground wire to reduce the risk of electrical shock.
1 Disconnect spade terminals from the drain valve.
2 Remove the screw holding the green ground wire and the two screws holding the valve to
the drain pan.
3 Squeeze the tabs of the spring clamp holding the hose to the drain valve and slide it up the
hose. Pull hose from drain valve. Lift the drain valve from the drain pan.
4 Unsnap red coil cap on solenoid and remove the solenoid from the valve.
5 Loosen brass nut holding actuator to plastic housing with a wrench and disassemble
actuator.
6 Clean actuator components and valve housing (inlet port, outlet port, and cylinder port). Put
new o-ring that was supplied with new cylinder into valve.
7 Reassemble actuator making sure tapered end of spring is oriented as shown in Figure 45:
Drain Valve Actuator Assembly. Tighten brass nut 1/4 turn past hand tight.
8 Clean out end of hose and reattach to valve. Slide hose clamp back in place and place valve
into drain pan.
9 Secure valve with 2 screws and attach green ground wire to solenoid.
Cylinder Port
and O-ring
Ground Wire
Hose and
Hose Clamp
Solenoid
Screws
Brass Nut
(Actuator)
Figure 44: Drain Valve
63 | Maintenance and Servicing
Spade Connectors
Plunger
Spring
(Note Orientation)
Sleeve
and
Solenoid
Figure 45: Drain Valve Actuator Assembly
Installing the New Cylinder
CAUTION: Make sure the new cylinder is the same model as the one that was removed.
Model number is on top left corner of cylinder label.
1 Insert cylinder into drain valve. Tilt cylinder forward and fit end of steam hose to steam
outlet. Tip cylinder back into place.
2 Secure cylinder with the reusable cable tie. Tighten hose clamp being careful not to over
tighten and crush the plastic cylinder steam outlet.
3 Attach color coded cylinder plugs to the corresponding color coded cylinder pin. Push down
completely. Connect high water sensor plug. Spring loaded plugs should fit snuggly onto
the cylinder pin. Replace if they are loose or damaged.
4 Replace the humidifier door and secure with door screw.
5 Turn on power to humidifier with the external disconnect.
6 Open supply water shut off valve.
7 Turn the humidifier On/Off switch to On.
8 After the software has completed its start up self check reset the cylinder by going to the
“Service Level” menu and selecting “Reset Cylinder”.
NOTE: If the “Cylinder Reset” is not entered the humidifier will operate for 72 hours and
then fault on cylinder spent!
Maintenance and Servicing | 64
Extended Shutdown
Should it be required to disconnect power to the humidifier for a period of extended shut-down,
always drain the cylinder first.
1
2
3
4
5
Press and release the Drain button on the keypad.
Wait until the humidifier is completely drained (usually takes less than 10 minutes).
Turn the On/Off switch to the Off position.
Shut off power to the humidifier with the external disconnect.
Close the supply water shut-off valve.
Note: As long as the NHTC/PC is powered, it will automatically drain the cylinder when
there has not been a call for humidity for an extended period of time. This feature will
reduce or prevent the possibility of corrosion of the electrodes and the accumulation
of algae and bacteria growing in the cylinder. The cylinder will remain empty until
there is a call for humidity at which time the fill valve will open and refill the cylinder.
The unit will go through its normal process for optimum operation.
Starting After Extended Shutdown
1 Check to see the humidifier has not been damaged and the installation has not been
altered. Refer to the Chapter on Start Up.
2 Turn on the power to the humidifier with the external disconnect.
3 Turn the On/Off switch to the On position.
4 Drain the humidifier completely by pressing and releasing the manual drain button. Wait
until there is no water flowing to drain. It usually takes less than 10 minutes.
5 Follow the start up procedure in the chapter on Start Up.
65 | Maintenance and Servicing
NHTC/PC Maintenance Checklist
Model #: _________________
Serial #: _________________
Cylinder #:
Cylinder / System Check
 W19 Cylinder Spent
Tag: ________


E19 Cylinder Spent
(If software displays W19 or E19 then cylinder must be replaced)
 Yellow LED On with W12- Sensor On Warning.

(If Yellow LED is On with W12 and cylinder is not new then cylinder will have to be replaced soon.)
 Other warnings or Faults shown in display?
No
 Yes 
(See Troubleshooting Chapter for actions to address warnings and faults if present)
Replace Cylinder
 Cylinder drained.

 Disconnect open, On/Off switch to Off, water shut off valve closed, door removed.
 Cylinder removed



Drain valve installed / ground wire attached. 
New Cylinder Installed and hose clamps tight. 
 Drain valve removed / cleaned / new O-Ring


 Cylinder plug colors match cylinder dots.
 Cylinder plugs snug and in good condition.
New cylinder model #
(Should be same as removed cylinder)




 High Water Sensor plug snug and in good condition.
 Electrical wiring not loose and in good condition,
 Steam hoses and steam lines in good condition / No kinks in hose,

 No Signs of water leaking around humidifier, steam line, condensate returns,

 Door replaced, water shut off valve opened, On/Off switch to On, Disconnect Closed
 “Reset Cylinder” in Software, (Password 0335, Service Level)
Inspected by:


Date of inspection: _______/_______/______
Company:
Maintenance and Servicing | 66
Troubleshooting
68 Organization of Troubleshooting Chapter
68
Troubleshooting Requirements
69 General Troubleshooting
69
Humidifier
70
Steam Distributors
71
SAM-e
71
Blower Pack
71
Digital Humidistat
72 NHTC/PC Warnings and Faults
72
Warnings
72
Faults
72
Clearing a Fault
79 NHTC/PC Wiring Diagram (Cylinder A)
80 NHTC/PC Wiring Diagram (Cylinder B)
67 | Troubleshooting
Organization of Troubleshooting Chapter
The troubleshooting chapter is broken down into 2 sections.
General Troubleshooting
Deals with troubleshooting incorrect humidifier operation,
steam line and plumbing issues without any control
software warnings or faults.
Humidifier Warnings and Faults
Deals with warning and error messages that are generated
by the humidifier’s control software.
CAUTION: Be aware, when troubleshooting, that the humidifier is powered by high voltage
and familiarity with both good practices and wiring of the humidifier is recommended.
Any troubleshooting that requires opening the cabinet should be done by qualified
personnel.
NOTE: Most humidifier faults are not caused by faulty equipment but rather by improper
installation. A complete fault diagnosis always involves a thorough examination of the
entire system. Often, the steam hose connection has not been properly executed, or the
fault lies with the humidity control system.
Troubleshooting Requirements
 Ensure the installation meets the installation requirements outlined in the Installation
Chapter of this manual.
 Familiarize yourself with the operation of the humidifier by reading the Operation Chapter of
this manual.
 Wiring diagram for specific for your humidifier is installed on the inside of the humidifier
door. A generic copy of the NHTC/PC wiring diagram is also included at the end of this
chapter for reference purposes.
 When contacting your local representative or NORTEC for troubleshooting assistance, please
ensure the serial number has been obtained for reference purposes.
Troubleshooting | 68
General Troubleshooting
The following section provides general guidelines for troubleshooting the NHTC/PC humidifier
and auxiliary components. For detailed troubleshooting information refer to the manuals that
were provided with the auxiliary equipment and to Table 8: Troubleshooting NHTC/PC Warnings
and Faults later in this chapter.
Humidifier
Table 6: General Troubleshooting
Symptom
Nothing happens when On/Off
switch is turned on.
Cause
Corrective Action(s)
1 Fuse blown
1 Check inline fuse in yellow housing
between transformer and driver board.
Check and replace fuse on driver
board.
2 Incorrect or no Voltage
2a Check voltage against spec label and
correct.
2b Check disconnect and insure
humidifier is getting power.
3 Step Down Transformer not
outputting 24VAC
3 Replace the transformer
4 Door interlock switch open
4a Replace the door
4b Pull door interlock switch out to
override.
Caution! The electrical and plumbing
compartment contain high voltage
components and wiring.
Humidifier will not humidify or
not reaching RH setpoint
1 Safety loop open
1a Check if W11: Safety loop open is
displayed on the humidifier’s display.
1b Check if there is 24 VAC at terminal
2.
1c Check wiring and operation of On/Off
devices connected to terminal 1 and
2. Ensure they are closing when they
should be.
2 High limit limiting output
2 Check if the high limit is installed too
close to the humidifier and if it is
operating correctly.
3 No signal on Channel 1
3 Check voltage between terminal 3 and
4. For demand configuration 25% of
full scale signal must be present for
humidifier to start. For transducer
configuration the signal must be lower
than setpoint for the humidifier to
start.
4 No signal on Channel 2
4 Check voltage between terminal 5 and
3. For demand configuration 25% of
full scale signal must be present for
humidifier to operate. For transducer
configuration the signal must be lower
than setpoint for the humidifier to
start..
(For units configured for dual
channel operation).
69 | Troubleshooting
Symptom
Humidifier has faulted or has
a warning
Cause
Corrective Action(s)
5 Capacity has been manually
limited
5 Check Manual Capacity on status
screens. Adjust “Manual Cap” in the
“Setting” submenu of the “Control
Setting” menu if necessary.
6 Low conductivity water
6 Check if W12: Cylinder Max Level is
displayed on the humidifier’s display. If
operated on low conductivity water it
may take several hours for the
NHTC/PC to reach full output capacity.
This is normal. During this time the
humidifier will not perform any drains
and the conductivity of the water in the
cylinder will increase.
1 Software has detected an
abnormal condition
1 Refer to table 8 troubleshooting
warnings and faults.
Steam Distributors
Symptom
Distributor spitting out water
Condensation in duct
Cause
Corrective Action(s)
1 Distributor not level
1 Use support at end o distributor to
ensure it is level.
2 “P” Trap too close to distributor
2 “P” Trap must be a minimum of 12 in
(30 cm) below the distributor to
ensure flow. Relocate if required.
3 Condensate line not sloped
sufficiently
3 Sufficient slope to insure flow is
required. Reinstall if required.
4 Trap blocked
4 Check that water flows through trap.
Clear out if blocked.
5 Condensate line double trapped
5 Condensate lines must not have two
traps in sequence. This can cause an
air lock and prevent water draining.
6 Steam line not insulated
6 If steam line is long condensate build
up could overload distributor
condensate port. Insulate line to
improve efficiency and install
additional condensate traps as
required.
1 Installation clearances not
observed
1 Refer to distributor installation manual
for required clearances. Relocate
distributor if required.
2 Design conditions changed
2 Check supply air temperature and
humidity to determine if conditions
have changed.
3 High limit not functioning
3 Check setting and operation of high
limit. Replace if defective.
4 Air proving not installed or not
working
4 Check that the humidifier will only
operate when there is air moving in
the duct.
5 Improper location of high limit
5 Check that high limit is installed where
it can detect high duct humidity.
Troubleshooting | 70
SAM-e
Symptom
SAM-e spitting out water
SAM-e Grommet leaks
Cause
Corrective Action(s)
1 “P” Trap too close to SAM-e
1 “P” trap must be at least 12 in (30
cm) below header. Relocate if
required.
2 Condensate line not sloped
sufficiently
2 Ensure line is sloped sufficiently to
carry condensate produced.
3 Steam line not insulated
3 If steam line is long condensate build
up could overload the SAM-e
condensate port. Insulate the steam
line to improve efficiency and install
condensate traps as required.
1 Distributor tubes not seated
properly
1 Push distributor tubes down until
support washer is resting on rubber
grommet.
2 Grommet Damaged
2 Replace any damaged grommets
Blower Pack
Symptom
Blower not operating
Cause
1 No power to blower pack
Corrective Action(s)
1a Check power connection.
1b Check blower pack fuses
Note: Blower pack does not
Come on unless steam is
2 On/Off Thermostat not closing
Being produced by the
humidifier.
2 Check wiring to thermostat replace if
it does not close when it is exposed to
steam.
Digital Humidistat
Symptom
Humidistat Reading incorrectly
71 | Troubleshooting
Cause
Corrective Action(s)
1 Sensor out of calibration
1 Check reading against known reliable
instrument. If out of calibration it can
be field calibrated ±10%. Press
buttons together until calH
appears on the display. Press to
display the current calibration trim.
Adjust using  buttons. Press 
button when done.
2 Improper sensor location
2 Check that the humidistat is
positioned in a location
representative of room humidity.
3 Exposed to draft or heat source
3 Check that heat/cold fluctuations,
drafts, sunlight, doors, or vents are
affecting the reading.
4 No vapour barrier
4 Insure drafts cannot affect reading by
ensuing vapour barrier is in place and
working.
NHTC/PC Warnings and Faults
The self-diagnostic system built into the NHTC/PC is continually monitoring the operation of the
humidifier.
Warnings
 When problem symptoms are detected, the NHTC/PC will attempt to take self-corrective
actions to try to correct the problem. A warning is displayed on the screen for information
purposes and the humidifier continues to operate.
 If the condition which generated the warning is eliminated the warning is cleared from the
display.
 While a warning is displayed the yellow “Service” LED is also illuminated.
Faults
 If the humidifier is not able to self correct a problem symptom it will if necessary respond by
shutting itself down.
 When this occurs the humidifier illuminates the red “Fault” LED, shuts off power to the
cylinder and drains the cylinder.
Clearing a Fault
 Check the fault message that the humidifier is displaying and take any necessary actions to
correct the cause(s) as outlined in Table 8, Troubleshooting Warnings and Faults.
 Power cycle the humidifier with the On/Off switch waiting 3 seconds between turning it off
and on.
Table 7: Troubleshooting Warnings and Faults
No.
E5
Display
Message
Cylinder B
Controller
Missing
Extended
Missing
E6
LED
Red
Red
System Detected
Controller cannot
detect the driver
board for cylinder
B
Slave unit not
communicating
with Master Unit.
Cause
Corrective Action(s)
1 Bad wiring connection.
1 Check ribbon cable to
driver board B.
2 Controller not
configured correctly
2 If humidifier is not a
double unit contact
factory for configuration
help
3 Driver board damaged
3 Replace driver board
1 Master unit not
configured correctly
1 Check configuration of
master as outlined in
Multi Mode Configuration
2 Slave unit not
configured correctly
2 Check configuration of
slave as outlined in Multi
Mode Configuration
3 Wiring to master unit
disconnected
3 Check that wire
connected to J2 of
Master and Slave nd that
polarity is not reversed
Troubleshooting | 72
No.
Display
Message
LED
System Detected
E6
Cont
E7
W11
W12
E12
CPU CRC Fault
Safety Loop
Open
Red
Grn
Blink
73 | Troubleshooting
4 Use 18-24 AWG multistrand, twisted pair,
shielded cable
1 Software has detected
a hardware problem
with main control board
1 Restart humidifier, if
error occurs within 1
minute replace main
control board. If error
does not occur then
primary power fluctuation
may be the cause.
2 Control board is wet
2 Let board dry and correct
condition which caused
board to become wet. Try
restart when dry.
1 On/Off device
connected to safety
loop is open
1a Normal operation, no
action required
2 Loose wire
2 Check wiring to all On/Off
devices connected to
terminals 1 and 2.
1 Humidifier has filled to
top of cylinder without
reaching demand
1 None, for information
only, it is normal for a
new cylinder to reach
max level before water in
cylinder is concentrated
and for an old cylinder to
reach max level near the
end of cylinder life.
Controller
hardware failure
Safety loop open
(terminal 1 and
2)
Red
Water level at top
of cylinder with
no current
Corrective Action(s)
4 Incorrect wire type used
Water level at top
of cylinder or
foaming
Cylinder Max
Level
Cylinder max
Level no current
Cause
1b Wrong setpoint, A/P not
sensing air movement
1b Add ¼ teaspoon of salt
to fill cup to assist
cylinder in concentrating.
2 Water foaming
2 Check if water level is at
top of cylinder. If water is
not at top there may be
foam in the cylinder. See
W18 – Foam.
1 Current transformer
loose on driver board
1 Open disconnect, ensure
current transformer
spade connectors are
secure. Squeeze with
pliers if loose.
2 Primary wire not looped
through current current
transformer.
2 Open disconnect, rewire
primary wire through
current transformer.
3 High water sensor plug
is on an electrode pin.
3 Install high water senor
plug on cylinder pin with
shroud around it.
No.
Display
Message
LED
System Detected
W13
Fill valve
activated for long
time but high
water level not
reached.
Fill Timeout
E13
Red
Water level in
cylinder should
rise faster than
1” per minute.
W15
Current has
exceeded 115%
of max
Over Current
E15
Cause
Corrective Action(s)
1 Drain valve leaking or
stuck open
1 Clean drain valve or
replace (see
maintenance chapter)
2 Water shut off valve
closed
2 Open shut off valve
3 Fill Valve strainer
blocked
3 Clean out strainer on fill
valve inlet.
4 High system back
pressure
4a Check for kinked hose
4b Check for proper
condensate removal (see
installation chapter)
4c Install fill cup extension
5 Air flow into cylinder
through steam line
5 Disconnect steam line,
let cylinder fill part way,
then reconnect steam
line.
1 Drain blocked water
over concentrated
1 Clean the drain line
2 Drain solenoid not
energized, water over
concentrated
2 Check and correct wiring
to drain valve.
3 Filling too fast, fill valve
damaged
3 Replace the fill valve
4 Filling too fast, wrong
fill valve
4 Check for correct fill
valve in parts list, replace
if incorrect
5 Wrong cylinder
5a If cylinder replaced
check if it is the same
model as the one
removed.
5b Check water
conductivity and check
with Nortec
representative for
alternate cylinder.
Red
6 Condensate from Other
source feeding to
humidifier
6 Remove any condensate
lines that are not from
the humidifier’s steam
distribution system.
7 Contactor seized /
sticking
7 Check if contactor
disengages when turned
off, replace if defective.
Troubleshooting | 74
No.
Display
Message
LED
System Detected
Cause
5 Water supply too
conductive
W16
Current has
exceeded 130%
of max
Excess Current
E16
E17
Red
Req off current
Red
Current detected
with no demand
5a Contact NORTEC
representative for
recommendation on
alternate cylinder
5b Change the water
supply
6 Wrong cylinder installed
6 Install correct cylinder
model
7 Cylinder Spent but not
detected by software
7 Replace the cylinder (see
maintenance chapter)
1 Contactor seized closed
1 Open Disconnect, check
if contactor is closed
2 Driver Board out of
Calibration
2 If display indicates output
with contactor open then
replace the driver board.
1 Back pressure
restricting water from
entering cylinder
1a Check for restrictions
and proper condensate
removal in steam line.
1b If water is going down
drain during fill cycle
then install fill cup
extension kit.
W18
Foam inside the
cylinder.
Foam
E18
Red
W19
Yel
E19
Corrective Action(s)
Cylinder Spent
Yel
Red
Conductivity too
low
Electrodes
covered with
scale.
Low water
conductivity
2 Organic material in
water
2 Install filter to remove
organic material
3 Drain blocked water
over concentrated
3 Clean the drain line
4 Humidifier short cycling
4 Observe operation to
insure humidifier can
normally run long enough
to perform a drain. If not
see W44 / W45 – Short
cycling.
1 Cylinder electrodes are
covered with scale and
humidifier cannot meet
demand
1 Replace cylinder with
same model number (see
maintenance chapter)
1 Drain valve leaking
1 Clean drain valve or
replace (see
maintenance chapter)
2 Back pressure causing
some fill water to go
down drain
2a Check for restrictions
and proper condensate
removal in steam line.
W20
2b If water is going down
drain during fill cycle
then install fill cup
extension kit.
3 Wrong Cylinder
Installed
75 | Troubleshooting
3 Install cylinder of same
model number as was
previously installed
No.
Display
Message
LED
System Detected
W20
Cont.
W23
No signal from
RH control
sensor
Control sensor
broken
E23
W24
Limit Sensor
Broken
4a Add 1/2 teaspoon of
salt to fill cup.
1 Sensor not powered
1 Use multimeter to check
that sensor is powered.
2 Sensor not wired
correctly
2 Check wiring is secure
and wired correctly per
instructions in
installation chapter.
3 Defective sensor
3 Check if sensor is
outputting corresponding
to RH. If not replace the
sensor.
4 RH less than 5%
4 RH less than 5% are
interpreted as a broken
sensor. Contact NORTEC
Representative for
recommendation.
5 Humidifier control
configuration incorrect
5 Check that the humidifier
control configuration
matches the installed
sensor output.
1 Normal operation,
cylinder is drained if
there is no demand for
3 days
1 None required. If feature
is not desired change
configuration in “User
Defined Settings” level of
software.
1 Normal operation if
configured, humidifier
is drained every three
days
1 None required, humidifier
has been configured to
drain every 3 days to
control scale build up.
1 High limit humidistat
too close to steam
distributor
1 Locate the high limit
humidistat a minimum of
10 feet (3 m) from the
distributor.
2 Loose wiring
2 Check wiring and insure
there are no loose
connections.
3 High limit humidistat
setpoint too low
3 Adjust the high limit
setpoint to 85% or more.
4 Defective high limit
humidistat
4 Replace defective
device.
5 Air proving cycling or
chattering
5 Check for smooth
operation of air proving
switch.
No signal from
RH Limit sensor
Red
W25
3-day idle drain
activated
3 days with no
demand for
humidity
W26
3 day forced
drain activated
3 days since last
forced drain
Safety loop
instability
Safety loop
opening/closing
rapidly
Corrective Action(s)
4 Newly installed cylinder
not reaching demand
for extended time due
to Low water
conductivity
Red
E24
W27
Cause
4b Adjust drain factor to
0.7 in User Defined
Settings (see operation
chapter)
Troubleshooting | 76
No.
W28
W29
W30
W43
W44
W45
Display
Message
Demand signal
instability
Limit signal
instability
Modbus remote
disable
Keep warm
active
Demand signal
short cycling
Safety loop short
cycling
77 | Troubleshooting
LED
System Detected
Demand swinging
from low to high
rapidly
Limit signal
swinging from low
to high rapidly
Network
shutdown
message
No demand in
last 2 hours
Demand signal
cycling on and off
Safety loop is
cycling On/Off too
frequently
Cause
Corrective Action(s)
1 Improper Proportional
and Integral settings in
control
1 Adjust proportional and
integral settings to
reduce swings in
demand signal.
2 Control humidistat
installed too close to
diffuser or doorway to
un-humidified space
2 Install humidistat so that
it senses air
representative of space
being humidified.
3 Defective control
3 Replace defective
control
1 High limit humidistat
too close to steam
distributor
1 Locate the high limit
humidistat a minimum of
10 feet (3 m) from the
distributor.
2 High limit humidistat
setpoint too low
2 Adjust the high limit
setpoint to 85% or more.
3 Improper Proportional
and Integral settings in
control
3 Adjust proportional and
integral settings to
reduce swings in
demand signal.
4 Defective control
4 Replace defective
control
1 Network signal received
by humidifier to shut
down.
1 Normal operation for
humidifier on network
control Contact network
administrator to enable
humidifier.
1 Humidifier configured to
keep cylinder water
warm
1 Normal operation for
humidifier configured to
keep cylinder warm. See
Operation Chapter, User
Defined Settings to
change configuration.
1 The humidifier has
detected short cycling
and reduced capacity
to stabilize operation.
1 Shortcyc set to On. If
feature is not desired
change configuration in
“User Defined Settings”
level of software.
2 humidifier oversized
2 Change the manual
capacity limit to 50% in
the Control Setting level
of software.
3 High limit too close to
distributor or control in
air subjected to
humidity swings
3 Locate high limit at least
10 ft (3 m) from
distributor. Move control
to space representative
of space being
humidified.
4 Damaged controls
4 Replace any damaged
controls.
No.
Display
Message
W46
RH High Warning
W47
W49
E50
LED
RH higher than
high RH setpoint
RH Lower than
low RH setpoint
RH Low Warning
Cylinder is not
recognized
Wrong Cylinder
installed
Modbus Timeout
System Detected
Red
No Modbus signal
Cause
Corrective Action(s)
1 Setpoint higher than
RH alarm setting
1 If the humidifier is still
operating then check and
adjust setpoints.
1 Humidifier not running
1 Check why humidifier is
not running and put it
into operation.
2 Setpoint lower than RH
low alarm setting
2 Check and adjust
setpoints.
1 Warning reserved for
future development
1 Contact factory for
instructions on
configuring software.
1 Loose connection
1 Check connections and
polarity of wires.
2 Incorrect Modbus
address
2 Check that Modbus
address of humidifier
matches that of master.
3 Humidifier configured
for Modbus but not
connected to network
3 Configure controls
correctly in “Control
Setting” level of software
(see Operation Chapter).
4 Improper wire used
4 Use 120 Ohm impedance
shielded twisted pair
cable.
5 Noise preventing
humidifier from
detecting signal.
5 Eliminate source of noise
causing interference.
Troubleshooting | 78
NHTC/PC Wiring Diagram (Cylinder A)
A
B
Unit ON Steam
Service
COM
NC
NO
COM
R BL
NC
R BK
NO
Y BK BL Y
NO
R
COM
+ 5 Vdc
(+) Control Signal
(+) Limit Signal
Loop
+
1 2 3 4 5 6 7 8 9
L2 L1
NO
Continued
on Wiring
Diagram#
2522001
(Cylinder B
Left Cylinder)
which is only
applicable to
double units
NH 150-200
External
Internal
Blower Pack
Air Proving
N.O.
COM
L3 L2 L1
Security
Blower Pack
Primary Power
(-) Signals
Circuit for Cylinder A
Error
Fault Remote PCB
C
D
E
F
PRI
SEC
Optional Fuses
Door Interlock
Switch
ON/OFF
Switch
Contactor
Cyl. B
Aux. Drain
Switch
Cyl. A
Contactor
Fill V
Drain V
Fill V
VTX SUPPLY
SWITCH
X3
X4
X7
X2
X1
Lev. Sensor
DRAIN V. INLET V.
M AIN SU PPLY
J5
CONTACTOR
SC2
Display
SC1
2
X6
J3
J3
Driver Board
A
3V
Battery
*
J1
CONT.SIGN.
F2
200mA
Cont Sig.
CPU BOARD
R
BL
IN
V+
R
Y
GND
Processor
Board
BK
Y
IN
G
GND
BK
BL
IN
V+
R
J4
*
J1
J2
LINK UP
J4
X8
EXTERNAL CON
LIM.SIGN. BLOWER
AUX LEVEL
1 2 3
1 2 3 4
X12
CYL. CHECK
High Water Plug
Cylinder
2,3, and 6 electrode
MODUL B
Current Sens
1
F1
6.3 A
(AC Loads)
*
J2
NOTE: NHTC Only
NHTC/NHPC HUMIDIFIER (Cylinder A)
WIRING DIAGRAM
DIAGRAM NUMBER 1509815
DATE Sept 17, 2009
Figure 44: NHTC/PC Wiring Diagram (Cylinder A)
79 | Troubleshooting
REV. E
NHTC/PC Wiring Diagram (Cylinder B)
+ 5 Vdc
(+) Control Signal
(+) Limit Signal
Loop
(-) Signals
Security
Circuit for Cylinder B
Blower Pack
Air Proving
N.O.
+
1 2 3 4 5 6 7 8 9
R
R BK
R BL
A
B
C
D
E
F
Optional Fuses
Contactor
Contactor
Fill V
Drain V
DRAIN V. INLET V.
VTX SUPPLY
SWITCH
X3
X4
X7
X2
X1
Lev. Sensor
CONTACTOR
M AIN SU PPLY
Fill V
SC2
SC1
2
X6
CONT.SIGN.
F2
200mA
Cont Sig.
LIM.SIGN. BLOWER
J1
CPU BOARD
LINK UP
J4
X8
EXTERNAL CON
1 2 3
1 2 3 4
CYL. CHECK
X12
AUX LEVEL
Driver Board
B
High Water Plug
Cylinder
2,3, and 6 electrode
MODUL B
Current Sens
1
F1
6.3 A
(AC Loads)
BL
IN
V+
GND
R
BK
Y
IN
GND
BK
BL
IN
V+
R
J2
Continued
on Wiring
Diagram#
1509815
(Cylinder A)
Y BK BL Y
NHTC/NHPC HUMIDIFIER (Cylinder B)
WIRING DIAGRAM
DIAGRAM NUMBER 2522001
DATE Sept 17, 2009
REV. D
Figure 45: NHTC/PC Wiring Diagram (Cylinder B)
Troubleshooting | 80
Spare Parts
82
83
85
87
89
92
81 | Spare Parts
Distributor Spare Parts
NHTC/PC 005-030 Plumbing Parts
NHTC/PC 050-200 Plumbing Parts
NHTC/PC 005-030 Electrical Parts
NHTC./PC 050-200 Electrical Parts
Warranty
Distributor Spare Parts
ASD & BSD
1506162 - Distributor End Cap Assembly
CSD
1506164 - Distributor End Cap Assembly
Distributor Core
ASD & BSD
1506161 - Distributor Inlet Assembly
CSD
1506163 - Distributor Inlet Assembly
Figure 46: Distributor Exploded View and Spare Parts
Spare Parts| 82
NHTC/PC 005-030 Plumbing Parts
7
8
10
9
2
14
13
6
12
11
4
3
1
5
Figure 47: NHTC/PC 005-030 Plumbing Parts
83 | Spare Parts
Table 9: NHTC/PC 005-030 Plumbing Parts List
1
1
1
1
1
550-600/3
1
440-480/3
1
380/3
1
220-240/3
1
208/3
1
550-600/3
1
440-480/3
277/1
1
30
380/3
220-240/1
550-600/1
1
208/1
440-480/1
380/1
1
220-240/3
1
208/3
1
20
550-600/1
1
20
440-481/1
227/1
1
THREE PHASE
10
380/1
220-240/1
DESCRIPTION
Volts/Ph
NORTEC
PART NO.
208/1
ITEM
NO.
5
110-120
SINGLE PHASE
MODEL
1
1
1
1
CYLINDER 201
1509724
CYLINDER 202
1509725
CYLINDER 203
1509726
CYLINDER 204
1509727
CYLINDER 321
1509732
CYLINDER 305
1509729
CYLINDER 309
1509730
CYLINDER 311
1509731
CYLINDER 303
1509728
CYLINDER 331
1509733
CYLINDER 333
1509734
CYLINDER 421
1509738
CYLINDER 407
1509736
CYLINDER 411
CLAMP FOR SMALL STEAM
LINE
1509737
3
DRAIN CHANNEL
1116857
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
4
DRAIN CHANNEL GASKET
VALVE DRAIN 93BEIGE + 24V
COIL
1631026
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1456000
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
5
1325007
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
6
CYLINDER BRACKET
1509593
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
7
FILL CUP ASSEMBLY SMALL
SMALL STEAM LINE 0.875 IN.
ID IN.
2522406
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1328810
12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12
1313244
1
8
9
VALVE, SINGLE FILL, 0.5 L/min
VALVE, SINGLE FILL, 1.2 L/min
10 GASKET FOR FILL THRU CAB
FITTING BRASS 3/4 BSP /
WASHER = 1/2" NPT
CABLE TIE REUSABLE 1-400
12
CYL SZ
CYL PLUG WITH BLACK
MARKER
CYL PLUG WITH YELLOW
13
MARKER
CYL PLUG WITH RED
MARKER
CYL PLUG WITH WHITE
14
MARKER
11
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1353017
1
1
1
1
1
1455000
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1506288
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1513003
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1510046
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1510049
1510047
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1510048
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2523334
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2522160
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
OPTIONAL COMPONENTS
FOAM DETECTION OPTION
FLOAT ASSEMBLY, FOAM
DETECTION
FILL CUP EXTENSION KIT
FILLCUP EXTENSION KIT
NHTC/NHPC
9
DRAIN WATER COOLING
VALVE, DUAL FILL, 3.3 L/min,
0.5 L/min
VALVE, DUAL FILL, 3.3 L/min,
1.2 L/min
1509698
1
Spare Parts| 84
NHTC/PC 050-200 Plumbing Parts
7
8
10
9
2
14
13
6
12
11
4
3
1
5
Figure 48: NHTC/PC 050-200 Plumbing Parts
85 | Spare Parts
Table 10: NHTC/PC 050-200 Plumbing Parts List
THREE PHASE
550-600/3
2
440-480/3
220-240/3
2
380/3
208/3
550-600/3
2
200
440-480/3
220-240/3
2
380/3
208/3
550-600/3
1
150
440-480/3
220-240/3
1
380/3
208/3
550-600/3
1
100
440-480/3
1
380/3
220-240/3
1
208/3
1
550-600/3
1509744
75
440-480/3
220-240/3
DESCRIPTION
CYLINDER 621
Volts/Ph
NORTEC
PART NO.
208/3
ITEM
NO.
380/3
50
MODEL
CYLINDER 603
1509739
CYLINDER 607
1509741
CYLINDER 605
1509740
CYLINDER 609
1509742
CYLINDER 617
1509743
CYLINDER 631
1509745
CYLINDER 636
CLAMP FOR LARGE STEAM
LINE
1509746
1325009
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
2
2
3
DRAIN CHANNEL
1116857
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
2
2
4
DRAIN CHANNEL GASKET
VALVE DRAIN 93BEIGE + 24V
COIL
1631026
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
2
2
1
2
5
1
1
1
1
1
1
2
1
1
2
2
2
2
1
2
1456000
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
2
2
6
CYLINDER BRACKET
1509593
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
2
2
7
FILL CUP ASSEMBLY LARGE
LARGE STEAM LINE 1.500 IN.
ID IN.
2522407
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
2
2
1328820
12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 24 24 24 24 24 24 24 24 24 24
1353032
1
8
9
VALVE, SINGLE FILL, 2.0 L/min
1
1
1
1
1
1
1
1
VALVE, SINGLE FILL, 3.3L/min
1353037
10 GASKET FOR FILL THRU CAB
1455000
1
1
1
1
1
1
1
1
1
1506288
1
1
1
1
1
1
1
1
1513005
1
1
1
1
1
1
1
1510046
2
2
2
1
1
2
1510049
2
2
2
1
1
1510047
2
2
2
1
1
FITTING BRASS 3/4 BSP /
WASHER - 1/2" NPT
CABLE TIE REUSABLE 5-600
12
CYL SZ
CYL PLUG WITH BLACK
MARKER
CYL PLUG WITH YELLOW
MARKER
CYL PLUG WITH RED
MARKER
13
SUPER PLUG /W WIRE WITH
BLACK MARKER
SUPER PLUG /W WIRE WITH
YELLOW MARKER
SUPER PLUG W/ WIRE WITH
RED MARKER
CYL PLUG WITH WHITE
14
MARKER
11
OPTIONAL COMPONENTS
FOAM DETECTION OPTION
FLOAT ASSEMBLY, FOAM
DETECTION
FILL CUP EXTENSION KIT
FILLCUP EXTENSION KIT
NHTC/NHPC
9
DRAIN WATER COOLING
VALVE, DUAL FILL, 3.3 L/min,
2.0 L/min
VALVE, DUAL FILL, 3.3 L/min,
3.3L/min
1
2
2
2
2
1
1
1
1
1
1
1
1
1
1
1
2
2
2
2
1
1
1
1
1
1
1
2
2
2
1
1
1
1
1
1
1
1
2
2
2
2
1
1
2
2
1
4
2
2
2
1
1
2
2
1
2
2
2
1
1
2
2
1
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
4
4
2
2
4
4
2
4
4
4
2
2
4
4
2
4
4
4
2
2
4
4
2
1324264
2
2
4
4
1324265
2
2
4
4
1324266
2
2
4
4
1510048
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
2
2
2523334
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
2
2
2522160
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
2
2
1
1
1
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
2
2
1
1
1
1
1
Spare Parts| 86
NHTC/PC 005-030 Electrical Parts
7
1
5
10
9
8
6
4
Figure 49: NHTC/PC 005-030 Electrical Parts
87 | Spare Parts
2
3
Table 11: NHTC/PC 005-030 Electrical Parts List
1
1
1
1
550-600/3
1
440-480/3
1
380/3
1
220-240/3
1
208/3
1
550-600/3
1
440-480/3
1
380/3
1
30
220-240/3
1
550-600/1
1
440-481/1
550-600/1
1
20
380/1
440-480/1
1
277/1
380/1
1
220-240/1
227/1
20
208/1
220-240/1
1453013
THREE PHASE
10
208/3
1
DESCRIPTION
CONTACTOR 30 AMP 1PH
Volts/Ph
NORTEC
PART NO.
208/1
ITEM
NO.
5
110-120
SINGLE PHASE
MODEL
1
1
1
CONTACTOR 30 AMP 3PH
1323013
CONTACTOR 40 AMP 3PH
TERMINAL BLOCK 2 POLE
95A
TERMINAL BLOCK 3 POLE
95 AMP
1323014
GROUND CLAMP
TRANSFORMER 120/24
VAC 75 VA
TRANSFORMER 208 24V
75VA
TRANSFORMER 240/24
VAC 75 VA
TRANSFORMER 277/24V
75VA
TRANSFORMER 380/24V
75VA
TRANSFORMER 480/24
VAC 75 VA
TRANSFORMER 600/24
VAC 75 VA
PCB PROCESSOR NHPC
(NOT SHOWN)
1323020
1
1423110
1
2521274
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
PCB PROCESSOR NHTC
2521277
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
7
PCB DRIVER NHPC,
NHTC INCL. ELECTRICITY
CONVERTER
2521278
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
8
SWITCH, ROCKER, DPST
2522489
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
9
SWITCH SPST 208-240V
SWITCH INTERLOCK IDM
423
CABLE RIBBON 40 PIN
NHTC/NHPC
CABLE RIBBON 10 PIN
NHTC FAULT
1473010
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1323091
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2522061
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2522062
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
CABLE EPROM SMALL
2522033
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
3
4
6
NOT SHOWN
10
1323001
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1323027
1323208
1
1
1
1
1
1
1
1323230
1
1
1
1
1
1
1
1
1323277
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1323380
1
1
1
1
1
1323460
1
1
1323575
1
1
1
1
1
1
1
1
1
Spare Parts| 88
NHTC./PC 050-200 Electrical Parts
7
1
5
10
9
8
6
4
Figure 50: NHTC/PC 050-200 Electrical Parts
89 | Spare Parts
2
3
Table 12: NHTC/PC 050-200 Electrical Parts
THREE PHASE
1
2
CONTACTOR 40 AMP 3PH
CONTACTOR 62 AMP 3PH
TERMINAL BLOCK 3 POLE
95 AMP
TERMINAL BLOCK 3 POLE
150 AMP
TERM. BLOCK 3 POLE 310
AMP
1323014
2
2
2
1
1
1
1
1323028
1
1
1
1
2
2
1
1
4
1
4
4
1
1
1
1323030
550-600/3
440-480/3
4
2
1
380/3
2
4
4
1
220-240/3
208/3
550-600/3
440-480/3
200
1
1
1
380/3
220-240/3
208/3
550-600/3
440-480/3
150
2
2
1
380/3
1
1323015
1323027
220-240/3
1
208/3
1
550-600/3
2
100
440-480/3
2
380/3
550-600/3
2
220-240/3
440-480/3
1323013
380/3
CONTACTOR 30 AMP 3PH
220-240/3
DESCRIPTION
Volts/Ph
NORTEC
PART NO.
208/3
ITEM
NO.
75
208/3
50
MODEL
2
4
1
1
1
1
1
1
1
1
1
1
1
1
GROUND CLAMP
TRANSFORMER 208 24V
75VA
TRANSFORMER 240/24
VAC 75 VA
TRANSFORMER 380/24V
75VA
TRANSFORMER 480/24
VAC 75 VA
TRANSFORMER 600/24
VAC 75 VA
TX 24VAC 150VA,
PRIMARY 208
TX 24VAC 150VA,
PRIMARY 240
TX 24VAC 150VA,
PRIMARY 480
TX 24VAC 150VA,
PRIMARY 600
TX 24VAC 150VA,
PRIMARY 380
1323020
1
1323208
1
PCB FAULT REMOTE
PCB PROCESSOR NHPC
(NOT SHOWN)
2521279
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2521274
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
PCB PROCESSOR NHTC
2521277
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
7
PCB DRIVER NHPC,
NHTC INCL. ELECTRICITY
CONVERTER
2521278
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
2
2
8
SWITCH, ROCKER, DPST
2522489
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
9
SWITCH SPST 208-240V
SWITCH INTERLOCK IDM
423
CABLE RIBBON 40 PIN
NHTC/NHPC
CABLE RIBBON 10 PIN
NHTC FAULT
1473010
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1323091
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2522061
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
2
2
2522062
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
2
2
CABLE EPROM LARGE
2522037
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
CABLE EPROM DOUBLE
JJN60(JLLN60)
(OPTIONAL)
JJN50(JLLN50)
(OPTIONAL)
PRIMARY FUSE JJN40
JLLN40 (OPTIONAL)
PRIMARY FUSE JJS40
(JLLS40) (OPTIONAL)
PRIMARY FUSE JJS50
(JLLS50) (OPTIONAL)
PRIMARY FUSE JJS60
(JLLS60) (OPTIONAL)
2522060
1
1
1
1
1
1
1
1
1
1
3
4
5
6
OPTIONAL COMPONENTS
NOT SHOWN
10
1323230
1
1
1
1
1
1
1
1
1
1
1
1323380
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2522319
1
1
1
2522320
1
2522321
1509693
1509694
1
1
1423176
1423160
1
1
2522322
1423173
1
1
2522318
1509692
1
1
1
1323575
1
1
1
1323460
1
6
1
6
12 12
6
12
6
12
6
6
6
12
6
6
6
Spare Parts| 90
91 | Warranty
Warranty
Walter Meier Inc. and/or Walter Meier Ltd. (hereinafter collectively referred to as THE
COMPANY), warrant for a period of two years after installation or 30 months from
manufacturer’s ship date, whichever date is earlier, that THE COMPANY’s manufactured and
assembled products, not otherwise expressly warranted (with the exception of the cylinder), are
free from defects in material and workmanship. No warranty is made against corrosion,
deterioration, or suitability of substituted materials used as a result of compliance with
government regulations.
THE COMPANY’s obligations and liabilities under this warranty are limited to furnishing
replacement parts to the customer, F.O.B. THE COMPANY’s factory, providing the defective
part(s) is returned freight prepaid by the customer. 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.
The warranties set forth herein are in lieu of all other warranties expressed or implied by law. No
liability whatsoever shall be attached to THE COMPANY until said products have been paid for in
full and then said liability shall be limited to the original purchase price for the product. Any
further warranty must be in writing, signed by an officer of THE COMPANY.
THE COMPANY’s limited warranty on accessories, not of the companies manufacture, such as
controls, humidistats, pumps, etc. is limited to the warranty of the original equipment
manufacturer from date of original shipment of humidifier.
THE COMPANY makes no warranty and assumes no liability unless the equipment is installed in
strict accordance with a copy of the catalog and installation manual in effect at the date of
purchase and by a contractor approved by THE COMPANY to install such equipment.
THE COMPANY makes no warranty and assumes no liability whatsoever for consequential
damage or damage resulting directly from misapplication, incorrect sizing or lack of proper
maintenance of the equipment.
THE COMPANY makes no warranty and assumes no liability whatsoever for damage resulting
from freezing of the humidifier, supply lines, drain lines, or steam distribution systems.
THE COMPANY makes no warranty and assumes no liability whatsoever for equipment that has
failed due to ambient conditions when installed in locations having climates below 14°F (10°C) during January or above 104°F (40°C) during July.
THE COMPANY retains the right to change the design, specification and performance criteria of
its products without notice or obligation.
Warranty | 92
U.S.A.
Walter Meier (Climate USA) Inc.
826 Proctor Avenue
Ogdensburg, NY 13669
CANADA
Walter Meier (Climate Canada) Ltd.
2740 Fenton Road
Ottawa, Ontario K1T 3T7
TEL: 1.866.NORTEC1
FAX: 613.822.7964
EMAIL: [email protected]
WEBSITE: www.humidity.com
www.norteconline.com
Certificate No. 002419
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