Condair 2577597-D EL Series User manual

Condair 2577597-D EL Series User manual
2577597_D_EN_1812_Nortec-EL_EM
NORTEC
ENGINEERING MANUAL
Electrode Steam Humidifier
Nortec EL-Series
Humidification and Evaporative Cooling
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Proprietary Notice
This document and the information disclosed herein are proprietary data of Condair Ltd. Neither this document, nor
the information contained herein shall be reproduced, used, or disclosed to others without the written authorization
of Condair Ltd., except to the extent required for selection, installation, operation or maintenance of the equipment.
Liability Notice
Condair Ltd. does not accept any liability due to incorrect installation, maintenance or operation of the equipment,
or due to the use of parts/components/equipment that are not authorized by Condair Ltd.
Copyright Notice
© Condair Ltd, All rights reserved.
Modification rights reserved.
Contents
1
1.1
1.2
1.2.1
1.3
1.4
1.5
1.6
Nortec EL Electrode Steam Humidifier
General Description
Features
Detailed Features List
Options
Accessories
Humidifier Components
User Interface
5
5
6
7
8
9
10
14
2
2.1
2.2
2.3
2.3.1
2.3.2
2.4
2.4.1
2.4.2
Operation
General
Sequence of Operation
Drain Cycles
Drain Cycle Activation
Drain Volume
Steam Cylinders
Water Conditions Versus Cylinder Life
Output Versus Cylinder Life
15
15
16
18
18
19
20
20
21
3
3.1
3.1.1
3.1.2
3.2
Product Specifications
Model Specifications
Model Designation
Nortec EL Specifications
Specification Drawings
23
23
23
24
29
4
4.1
4.2
4.3
4.3.1
4.3.2
4.3.3
4.3.3.1
4.3.3.2
4.3.3.3
4.3.4
4.4
4.4.1
4.4.1.1
4.4.1.2
4.4.2
4.4.3
4.4.3.1
4.4.3.2
4.4.4
4.4.5
4.5
Planning
Location and Clearances
Services
Installation Requirements
Humidifier Mounting
Water and Drainage Connections
Steam Distribution
Duct Distributors
Blower Packs
Atmospheric Steam and Condensate Lines
Electrical Connection
Control System Design
Control Signal Input
Analog Control Signals
Digital Control Signals
Condair Linkup
Humidity Control Design
Duct Distribution Control Design
Space Distribution Control Design
Remote Fault Indication Board
Accessory Board
Preventative Maintenance
35
35
36
38
38
39
40
40
41
42
46
47
48
48
49
50
51
51
53
54
55
56
Nortec EL
2577597_D_EN_1812_Nortec-EL_EM
Contents
3
4
5
5.1
5.1.1
5.1.1.1
5.1.1.2
5.1.1.3
5.1.1.4
5.1.2
5.1.3
Total Humidification Load Calculation
Total Humification Load
Calculating Base Humidification Load
Total Unconditioned Air Supply Volume
Unconditioned Supply Air Moisture
Conditioned Air Moisture
Base Humidification Load
Moisture Content Equilibrium
Condensate Loss
57
57
58
58
58
59
59
60
61
6
6.1
6.2
Product Selection
Humidifier and Options
Steam Distribution Equipment
63
63
65
A
A.1
A.2
Appendix
Sample Specification
Blank Schedule
67
67
69
Contents
2577597_D_EN_1812_Nortec-EL_EM
Nortec EL
1
Nortec EL Electrode Steam Humidifier
1.1
General Description
The Nortec EL humidifier is an atmospheric steam generator, which operates on the electrode heating
principle – heat is generated by the resistance to flow of electric charge between electrodes immersed
in water. The Nortec EL humidifier is designed for direct room humidification using a blower pack, or
humidification through the ducts in an air handling unit using a steam distributor. It is suitable for a variety
of humidification applications including commercial offices, hospitals, computer rooms, museums, clean
rooms, schools, printing plants, and other applications where reliability is required.
The Nortec EL humidifier comes in three different housing sizes – small, medium and large depending
on the steam output. The small model has capacities ranging from 5 lb/h (2 kg/h) to 30 lb/h (14 kg/h), the
medium model from 50 lb/h (23 kg/h) to 100 lb/h (45 kg/h), and the large model from 150 lb/h (68 kg/h)
to 200 lb/h (91 kg/h). The small and medium size models can be ordered with a built-on blower pack.
Refer to Figure 1. Table 8 on page 24, Table 9 on page 26 and Table 10 on page 27 list the specifications for
each model.
The large model has two steam cylinders instead of one. The construction is similar to the single cylinder
units except that it has two fill and drain connections, and two driver boards and low voltage terminal
strips – one for each steam cylinder (designated "A" and "B"). The separate driver boards and low voltage terminal strips allow the large model to handle two separate sets of control signals. This gives the
large Nortec EL humidifier the flexibility to operate in independent mode, parallel mode or series mode
so it can control humidity in up to two different zones.
In independent mode, each steam cylinder operates independent of the other to control humidity in two
separate zones. The control signals are wired to the driver board and low voltage terminal strip that
controls the corresponding zone.
In parallel mode, one set of control signals is wired to the driver board and low voltage terminal strip for
steam cylinder "A", which controls the humidity in both zones. Both steam cylinders respond equally to
the demand for humidity.
In series mode, one set of control signals is wired to the driver board and low voltage terminal strip for
steam cylinder "A", which control the humidity in both zones. In this mode, both steam cylinders operate
in a staged fashion – steam cylinder "A" can be configured to handle output from 0-50% of demand, and
cylinder "B" from 50-100% of demand. The advantage is that it permits the unit to vary its output from
25-100% of its capacity – 25% being the minimum output capacity of each steam cylinder.
7
1
2
Figure 1: Nortec EL Humidifier Models
1
2
3
4
Nortec EL
EL005-030 – small model with single steam cylinder
EL005-030 – small model with single steam cylinder and
built-on blower pack
EL050-100 – medium model with single steam cylinder
EL050-100 – medium model with single steam cylinder
and built-on blower pack
3
4
5
6
7
2577597_D_EN_1812_Nortec-EL_EM
6
5
EL150-200 – large model with dual steam cylinders
Steam cylinder "A", large model
Steam cylinder "B", large model
Nortec EL Electrode Steam Humidifier
5
1.2
Features
The Nortec EL humidifier has many advanced features that set it apart from other humidifiers.
•
Pure, clean steam at an economical price.
•
Easiest commercial humidifier to install and maintain. Fully configured and packaged unit that is
ready to install out-of-the-box.
•
Patented Auto-adaptive Control minimizes water usage.
•
State-of-the-art touchscreen controller provides great user experience and advanced user controls.
•
Robust product from the company that has been in the market for over 40 years, and continues to
perfect humidification technology.
•
Zero side clearance for small installation footprint.
•
Certified to meet OSHPD seismic requirements.
•
Extremely efficient boiling process, electrical current passes directly through water.
•
Standard integration into building management systems (BMS) using Modbus, BACnet MS/TP or
BACnet IP. Other protocols are available as options.
•
Standard drain water cooling which tempers drain water to meet local plumbing code requirements
before it is emptied into the drain.
•
USB port for loading software updates and downloading performance data.
•
Connect up to 12 steam cylinders together in a "Main-Extension" configuration using Condair Linkup
to satisfy large humidification needs.
•
SIM card for storage of operating parameters and settings.
•
Aesthetic cabinet design.
•
Remote interface to control and modify humidifier settings.
Refer also to the detailed features listed in Table 1.
6
Nortec EL Electrode Steam Humidifier
2577597_D_EN_1812_Nortec-EL_EM
Nortec EL
1.2.1
Detailed Features List
Table 1: Nortec EL Features
Other
Operation and Maintenance
Control and User Interface Features
Feature
Nortec EL
Description
Standard
Optional
Touchscreen interface
Intuitive user interface to configure and monitor the humidifier.

Digital graphic display
Displays visual feedback of the humidifier inputs (conditioned
environment humidity and setpoints).

On/Off control
Operate the equipment with simple On/Off controls.

Up to two modulating control
inputs per cylinder
Allows modulating humidifier output to improve accuracy of
supply humidity.

Integrated PI controller
Provides direct compatibility with humidity transducers (RH
sensor) with adjustable setpoints and P/I parameters.

Demand signal acceptance
Provides direct compatibility with modulating demand signals.

Digital communication
protocols
Provides BMS interface with integrated BACnet IP, BACnet
MS/TP and Modbus protocols.

BTL-certified protocols
Provides BTL-certified BACnet IP, BACnet MS/TP connectivity, and enables use of LonWorks.

Remote fault indication board
Allows dry contact feedback on unit operation.

Accessory relay board
Allows enabling/disabling of accessory devices such as fans
and valves.

Remote interface
Allows direct Ethernet access to the humidifier through a PC.

Independent circuits on multicylinder humidifiers
Allows for independent control of multiple humidifier cylinders
through a common control system.

Status indicator LED
Provides quick feedback on operating status of the unit.

Adjustable units of measure
Display settings in metric or imperial units of measure.

Manual output adjustment
Provides the ability to limit the maximum steam output of the
humidifier.

Auto pulse drain valve
Clears potential drain obstructions.

Disposable cylinder
Allows for fast, clean, simple service of the humidifier.

Auto-adaptive control system
Efficient water consumption and humidifier performance.

Drain water cooling
Drain water tempered to 140 °F (60 °C) during normal and
manual operation.

Extreme drain water cooling
Drain water tempered to 120 °F (49 °C) during normal and
manual operation.
Potable drinking water usage
Compatible with standard potable water supplies.

Foam detection
Standard foam detection and correction capability.

Advanced foam detection
Advanced foam detection and correction capability.
Backflow prevention
Integrated air gap in fill cup provides protection for supply
water systems.
Extended fill cup
Accommodates backpressure up to 10 in H20 (2.49 kPa).
Keep Warm function
Provides improved humidifier response time.

Short cycling detection and
correction
Prevents operational problems associated with seasonal
shifts in humidity load.

C-UL-US Listed
Certified to meet product standards as detailed by Underwriters Laboratories.

OSHPD seismic certification
Certified to meet OSHPD seismic requirements.

Warranty
Provides guarantee against manufacturer defects. Refer to
"Warranty".

Choice of steam distribution*
Allows for distribution to the conditioned environment directly
with the Nortec EL Space model, or indirectly through duct
distributors.

Wall mounting
Provides a convenient means of integrating humidification
needs.





* The Nortec EL Space model includes a steam distributor.
Nortec EL
2577597_D_EN_1812_Nortec-EL_EM
Nortec EL Electrode Steam Humidifier
7
1.3
Options
Table 2 lists the options available for the Nortec EL humidifier. Detailed installation instructions are supplied with each option.
Table 2: Nortec EL Options
Availability
Option
Factory
Installed
Built-on blower pack

Mounting bar

Mounting rack
A blower pack is used to distribute steam generated by
the humidifier directly into a conditioned environment. The
Nortec EL Space model comes with a factory-installed
blower pack and internal steam and condensate connections. A remote-mounted blower pack is also available. Refer
to "Blower Packs" on page 41 for more information.

Provides two mounting bars which fit into each other for
wall mounting. One bar is fastened to the humidifier, and
the other bar is fastened to the wall. The unit can be hung
onto the wall by engaging the two mounting bars. Note: The
unit can also be wall-mounted (without this option) using the
keyhole cutouts on the back of the humidifier housing.

Stand-alone rack for mounting the Nortec EL humidifier.
Remote fault indication board


Printed circuit board (PCB) with relay contacts for connecting remote status displays for “Unit On”, “Steam”, “Error” and
“Service”. Refer to "Remote Fault Indication Board" on page 54.
Accessory board


PCB with relay contacts for connecting other accessories
such as fans and supply water flushing valves. Refer to "Accessory Board" on page 55.
Factory-configured control
settings

The humidifier can be factory-configured for the requested
control signal acceptances. The humidifier can also be
reconfigured in the field, as needed. Refer to Table 6 on
page 13 for standard part numbers.
Internal primary fusing

Internal fuse for heating voltage power supply. Only available as a factory-installed option. Note: This is NOT a
substitute for a dedicated external disconnect switch. Refer
to Table 5 on page 12 for part numbers.
Fill cup extension

Kit for extending the fill cup so the humidifier can accommodate backpressure up to 10 in H20 (2.49 kPa).
Extreme drain water cooling


Kit for cooling drain water to less than 120 °F (49 °C) before
it is discharged into the drain.
Advanced foam detection


Kit for extending the ability of the humidifier to handle a
wider range of water supply quality.
BTL-certified BACnet MS/TP
digital communications


PCB to provide BTL-certified BACnet MS/TP connectivity.
This option also enables full Master functionality when using
BACnet MS/TP.
BTL-certified BACnet IP
digital communications


PCB to provide BTL-certified BACnet IP connectivity.
LonWorks digital communications


Supplementary board to provide LonWorks connectivity.

Spare steam cylinders to ensure minimal downtime. Refer to
Table 8 on page 24 for standard steam cylinders.

Kit consists of a transformer, fusing, and a terminal block to
supply power to the remote-mounted blower pack. Without
this option, a separate 110-120 V supply must be supplied
for the remote-mounted blower pack.
Spare steam cylinder
Remote blower pack power
kit
8
Description
Field Install
Kit
Nortec EL Electrode Steam Humidifier

2577597_D_EN_1812_Nortec-EL_EM
Nortec EL
1.4
Accessories
Table 3 lists the accessories available for the Nortec EL humidifier. Detailed installation instructions are
supplied with each accessory. Standard part numbers are also listed below.
Table 3: Nortec EL Accessories
Accessory
Nortec EL
Description
External condensate cooling
Self-actuated and electric condensate waste water coolers are used to reduce waste water
temperatures to below 140 °F (60 °C) before it is discharged into drains.
Steam distributor
Steam distributors are used for adding steam into ventilation ducts. They are available in
three different steam capacities and various lengths to suit duct dimensions.
Refer to Steam Distributor Installation Manual (document 2556592) for additional details and
part numbers.
SAM-e and Mini SAM-e
distribution manifolds
The SAM-e distribution manifolds are used for adding steam into ventilation ducts larger than
24 in (6 cm) where either higher steam capacity or short absorption distance is required. The
Mini SAM-e is available in dimensions under 24 in (61 cm). They are available in a range of
sizes and steam capacities to match duct and humidifier requirements.
Refer to SAM-e Engineering Manual (document 1503529) for additional details and part
numbers.
Remote blower pack
Blower packs are used for direct humidification of the conditioned environment. Blower
packs are capable of distributing up to 100 lb/h (45 kg/h), should be selected to match or
exceed humidifier capacity.
Refer to Blower Pack Installation, Operation and Maintenance Manual (document 2582277)
for additional details.
On/Off humidistats
Condair offers a range of digital and mechanical On/Off duct and wall-mounted humidistats
for use with control and high limit applications. Refer to Table 7 on page 13.
Modulating humidistats
Condair offers a range of digital modulating duct and wall-mounted humidistats for use with
control and high limit applications. Refer to Table 7 on page 13.
Outdoor temperature sensors
Provides automatic humidistat setpoint reduction to prevent condensation on windows/surfaces adjacent to outdoor air. Refer to "Outdoor Temperature Setback" on page 52 for additional
details.
2520263 – Duct-mounted temperature sensor
2553858 – Outdoor mounted temperature sensor
Humidity transducers
Condair offers a range of digital humidity sensors for duct and wall-mounting for use with
control and high limit applications. Refer to Table 7 on page 13.
Air proving switch
Provides a mechanical differential pressure switch to enable humidifier operation when
there is airflow through the ventilation ducts. Adjustable for pressures 0.05-12 in H2O (0.012.99 kPa). Refer to "Air Proving Switch" on page 51 for additional details.
Steam line reducers
Provides a means of adapting steam line diameters to match the diameter of the steam
distributor.
1507846 – Steam line reducer (1-3/4 in to 7/8 in) copper
1508165 – Steam line reducer (1-3/4 in to 7/8 in) stainless steel
Condair flexible steam and
condensate hose
Steam hoses can be used as steam distribution lines or as couplers between copper or
stainless steel steam distribution lines. When used for steam distribution the maximum recommended hose length is 10 ft (3 m). Steam hose is available in two sizes.
Condensate hose can be used for draining condensate, or coupling to copper or stainless
steel condensate lines.
1328810 – Steam hose (7/8 in I.D.) per foot (30 cm)
1328820 – Steam hose (1-3/4 in I.D.) per foot (30 cm)
1328840 – Condensate hose (3/8 in I.D.) per foot (30 cm)
Large/small condensate trap
tee
Condensate trap tee must be used to remove condensate that forms in steam distribution
lines. Condair offers tees to match large and small steam lines.
1329634 – Condensate trap tee – small (7/8 × 7/8 × 3/8 in)
1329635 – Condensate trap tee – large (1-3/4 × 1-3/4 × 3/8 in)
In-line water filter and replacement filter elements
In-line water filter to remove sediments in the supply water that can obstruct the fill valve
strainer or drain fittings.
1329505 – In-line water filter (5 micron)
1329561 – Replacement filter elements (1 micron)
1329506 – Replacement filter elements (5 micron)
2577597_D_EN_1812_Nortec-EL_EM
Nortec EL Electrode Steam Humidifier
9
Table 3: Nortec EL Accessories, continued...
Accessory
1.5
Description
Condensate pump
High temperature condensate pump for pumping waste water from the Nortec EL or condensate from the distributor systems.
1429527 – Drain water sump pump, low flow
2524504 – Electric sump pump, medium flow
2576898 – Electric sump pump, high flow
Drain air gap reducer
All Nortec EL humidifiers require an air gap in the drain line as close as possible to the humidifier. The air gap reducer is a 2-1/2 in to 7/8 in (63.5 mm to 22 mm) fitting that can provide
the required air gap.
2522172 – External drain air gap reducer
Pocket hygro-thermometer
digital display
The pocket hygro-thermometer provides a means to check the humidity and temperature in a
space. It is a useful tool for troubleshooting humidity problems.
1469595 – Pocket hygro-thermometer digital display
Transformer, plug-In,
120 VAC to 24 VAC
“Wall Wart” AC adaptor 120 VAC to 24 VAC, 40 VA for providing power to remote electronics/
controls.
1603032 – Transformer, plug-In, 120 VAC to 24 VAC
Humidifier Components
Figure 2 shows the various components of the Nortec EL humidifier. The door panels have been removed
for clarity.
11
25
12
10
1
9
13
24
2
14
8
23
15
3
16
22
4
21
7
20
19
18
17
6
5
Figure 2: Nortec EL Humidifier Components (Medium Size Model Shown)
1
2
3
4
5
6
7
8
9
10
11
12
13
10
Contactor
Driver board
Terminal block, high voltage supply
Specification label
Transformer
Remote fault indication PCB
Integrated control board
Cylinder strap
Electrode plug
Steam outlet hose (optional)
Steam adaptor (optional)
Sensor, high water level (orange wire)
Low voltage terminal strip
Nortec EL Electrode Steam Humidifier
14
15
16
17
18
19
20
21
22
23
24
25
Front panel
Touchscreen display
On/Off switch
Drain canal
Drain valve
Steam cylinder
Fill hose (fill cup to cylinder)
Fill valve
Fill hose (fill valve to fill cup)
Steam outlet, steam cylinder
Overflow hose
Fill cup
2577597_D_EN_1812_Nortec-EL_EM
Nortec EL
The Nortec EL humidifier housing contains two cabinets – the plumbing cabinet (on the left) and the
controls cabinet (on the right) – refer to Figure 2 on page 10. Table 4 summarizes the functions of the main
components in these two cabinets.
Table 4: Nortec EL Humidifier Component Functions
Controls cabinet
Plumbing cabinet
Component
Nortec EL
Function
Steam cylinder
Water reservoir in which boiling takes place. It houses a set of electrodes that are
used to boil the water. It has a steam outlet at the top, and a water inlet/outlet at the
bottom.
Electrode plug
Insulated connector that feeds electric current to the electrodes housed in the steam
cylinder.
High water sensor
Detects maximum water level in the steam cylinder.
Drain canal
Combined drain outlet for discharge from the steam cylinder, and overflow from the fill
cup.
Drain valve
Controls the flow of feed water from the fill cup into the steam cylinder, and drain water out of the steam cylinder. The stem of the steam cylinder (which houses its water
inlet/outlet) fits into the valve body.
Fill cup
Provides a gravity feed means to fill the steam cylinder through the drain valve. A builtin air gap prevents backflow.
Fill valve
Controls the flow of feed water into the fill cup.
Fill cup extension (optional)
Optional kit for extending the fill cup so the humidifier can accommodate backpressure
up to 10 in H2O (2.49 kPa).
Extreme drain water cooling
valve (optional)
Optional kit for cooling the drain water to less than 120 °F (49 °C) before it is discharged into the drain.
Foam detection kit (optional)
Optional kit for extending the ability of the humidifier to operate with a wider range of
water quality.
High voltage terminal block
Primary power connection from the external disconnect switch to the humidifier.
Contactor
Activates/deactivates power to the electrodes in the steam cylinder.
Driver board
Provides input and output connections to the humidifier components.
Integrated control board
Controls all functions of the humidifier, and provides a user interface through the integrated touchscreen display. It also permits connection to multiple humidifiers, as well
as to the BMS. An on-board USB port also permits exchange of data.
Touchscreen display
User interface to monitor and control the humidifier.
On/Off switch
Allows the user to turn the humidifier On and Off.
Low voltage terminal strip
Terminal strip for connecting control signal inputs to the humidifier.
Remote fault indication PCB
Optional printed circuit board with dry contacts to connect remote status displays for
"Unit On", "Steam", "Error" and "Service".
Accessory relay PCB (not
shown)
Optional printed circuit board with dry contacts to enable/disable other accessories
such as fans and supply water flushing valves.
Transformer
Steps down primary voltage to 24 VAC to power the on-board low voltage electronics.
2577597_D_EN_1812_Nortec-EL_EM
Nortec EL Electrode Steam Humidifier
11
Part numbers and quantities for ordering Nortec EL options are shown in Table 5.
Table 5: Nortec EL Options, Part Number Matrix
Part Number and Quantity
Voltage and
Phase
120 V, 1 Ph.
208 V, 1 Ph.
220-240 V,
1 Ph.
277 V, 1 Ph.
380 V, 1 Ph.
Steam
Capacity
lb/h (kg/h)
Remote
Fault
Indication
Board
Accessory
Board
Mounting
Bar
Mounting
Rack
Fill Cup
Extension
Extreme
Drain Water
Cooling
Power Kit
– Remote
Blower
Pack
Built-on
Blower
Pack
Advanced
Foam
Detection
5 (2.2)
RFI ×1
ACC ×1
MP-S ×1
MR-S ×1
OPS ×1
DWC0.5 ×1
BPP-SM ×1
BOBP ×1
FD ×1
10 (4.5)
20 (9)
10 (4.5)
20 (9)
10 (4.5)
20 (9)
10 (4.5)
20 (9)
440-480V,
1 Ph.
10 (4.5)
550-600V,
1 Ph.
10 (4.5)
20 (9)
20 (9)
RFI ×1
ACC ×1
MP-S ×1
MR-S ×1
OPS ×1
DWC0.5 ×1
BPP-SM ×1
BOBP ×1
FD ×1
RFI ×1
ACC ×1
MP-S ×1
MR-S ×1
OPS ×1
DWC0.5 ×1
BPP-SM ×1
BOBP ×1
FD ×1
RFI ×1
ACC ×1
MP-S ×1
MR-S ×1
OPS ×1
DWC0.5 ×1
BPP-SM ×1
BOBP ×1
FD ×1
RFI ×1
ACC ×1
MP-S ×1
MR-S ×1
OPS ×1
DWC0.5 ×1
BPP-SM ×1
BOBP ×1
FD ×1
RFI ×1
ACC ×1
MP-S ×1
MR-S ×1
OPS ×1
DWC0.5 ×1
BPP-SM ×1
BOBP ×1
FD ×1
RFI ×1
ACC ×1
MP-S ×1
MR-S ×1
OPS ×1
DWC0.5 ×1
BPP-SM ×1
BOBP ×1
FD ×1
MP-S ×1
MR-S ×1
MP-M ×1
MR-M ×1
20 (9)
50 (23)
75 (34)
DWC0.5 ×1
OPS ×1
RFI ×1
ACC ×1
200 (91)
20 (9)
30 (14)
MP-L ×1
MR-L ×1
MP-S ×1
MR-S ×1
MP-M ×1
MR-M ×1
50 (23)
OPS ×2
ACC ×1
20 (9)
30 (14)
MP-L ×1
MR-L ×1
MP-S ×1
MR-S ×1
MP-M ×1
MR-M ×1
50 (23)
OPS ×2
ACC ×1
MP-L ×1
20 (9)
MP-S ×1
30 (14)
MR-L ×1
OPS ×2
BPP-L ×1
–
FD ×2
DWC2.0 ×2
DWC3.3 ×2
DWC2.0 ×1
FK3-6 ×1
FK3-1 ×1
BPP-SM ×1
BOBP ×1
FD ×1
FK3-3 ×1
FK3-5 ×1
BPP-L ×1
–
FD ×2
FK3-6 ×1
FK3-2 ×1
BPP-SM ×1
BOBP ×1
FD ×1
FK3-4 ×1
ACC ×1
MP-M ×1
DWC3.3 ×2
BPP-L ×1
–
FD ×2
BPP-SM ×1
BOBP ×1
FD ×1
MR-M ×1
100 (45)
DWC2.0 ×1
FK3-7 ×1
FK3-2 ×1
DWC1.2 ×1
OPS ×1
RFI ×1
DWC2.0 ×2
DWC0.5 ×1
MR-S ×1
50 (23)
FK3-4 ×1
DWC3.3 ×1
150 (68)
200 (91)
20 (9)
30 (14)
MP-L ×1
MR-L ×1
MP-S ×1
MR-S ×1
MP-M ×1
MR-M ×1
50 (23)
OPS ×2
ACC ×1
Nortec EL Electrode Steam Humidifier
DWC3.3 ×2
BPP-SM ×1
–
FD ×2
DWC2.0 ×1
FK3-7 ×1
FK3-2 ×1
DWC1.2 ×1
100 (45)
200 (91)
DWC2.0 ×2
DWC0.5 ×1
OPS ×1
RFI ×1
150 (68)
12
DWC2.0 ×1
FK3-3 ×1
DWC3.3 ×1
200 (91)
75 (34)
DWC3.3 ×2
DWC1.2 ×1
OPS ×1
RFI ×1
150 (68)
550-600 V,
3 Ph.
DWC2.0 ×2
FK1-2 ×1
FK3-5 ×1
DWC0.5 ×1
100 (45)
75 (34)
FD ×1
DWC3.3 ×1
150 (68)
440-480 V,
3 Ph.
BOBP ×1
DWC1.2 ×1
100 (45)
75 (34)
BPP-SM ×1
DWC0.5 ×1
OPS ×1
RFI ×1
200 (91)
380 V, 3 Ph.
DWC2.0 ×1
DWC3.3 ×1
150 (68)
75 (34)
FK1-3 ×1
FK3-1 ×1
DWC1.2 ×1
100 (45)
220-240 V,
3 Ph.
FK1-1 ×1
FK1-1 ×1
FK1-1 ×1
30 (14)
208 V, 3 Ph.
Internal
Primary
Fuse
BPP-SM ×1
BOBP ×1
FD ×1
FK3-4 ×1
DWC3.3 ×1
MP-L ×1
MR-L ×1
OPS ×2
DWC2.0 ×2
DWC3.3 ×2
2577597_D_EN_1812_Nortec-EL_EM
BPP-L ×1
–
FD ×2
FK3-7 ×1
Nortec EL
Part numbers for ordering control signal configurations for the Nortec EL humidifier are shown in Table 6.
Table 6: Nortec EL Control Signal Acceptance Part Numbers
Standard Part Numbers – Demand Signal
Acceptance
Signal
Standard Part Numbers – Transducer
Signal Acceptance
Single Channel
Dual Channel
Single Channel
Dual Channel
0-5 VDC
2523060
2523061
2523100
2523101
0-20 mA
2523062
2523063
2523102
2523104
4-20 mA
2523064
2523065
2523105
2523107
0-10 VDC
2523066
2523089
2523110
2523111
0-16 VDC
2523090
2523091
2523112
2523113
1-5 VDC
2523092
2523093
2523114
2523115
2-10 VDC
2523094
2523094
2523116
2523117
0-20 VDC
2523096
2523097
2523118
2523119
Part numbers for ordering other accessories are shown in Table 7.
Table 7: Humidistat Part Numbers
Part
Number
Demand
Transducer
DuctWallDuctWallmounted mounted mounted mounted
Digital
Mechanical 0-10 VDC 2-10 VDC
On/Off
Fan Start
2548732

–
–
–

–
–
–


2548731
–

–
–

–
–
–


2520273*

–
–
–

–
–
–


1510142
–

–
–

–

–
–

2520266*

–
–
–

–

–
–

1329102
–

–
–
–

–
–

–
1329108

–
–
–
–

–
–

–
1509858
–
–
–


–
–

–
–
1509857
–
–

–

–
–

–
–
* Remote-mounted digital controller included for ease of access.
Nortec EL
2577597_D_EN_1812_Nortec-EL_EM
Nortec EL Electrode Steam Humidifier
13
1.6
User Interface
The Nortec EL humidifier has an interactive touchscreen display which can be used to configure and
monitor its operation. Refer to Figure 3.
In addition, the unit can also be configured and monitored remotely using the built-in BMS connectivity
(BACnet, Modbus).
1
2
3
Figure 3: Nortec EL User Interface
1
2
3
14
Touchscreen display – user interface to configure the humidifier, and access status information
Status LED – multi-function LED changes color to indicate operating status of the unit
On/Off switch – allows user to turn humidifier On/Off
Nortec EL Electrode Steam Humidifier
2577597_D_EN_1812_Nortec-EL_EM
Nortec EL
2
Operation
2.1
General
The Nortec EL humidifier produces pure steam at a variable output rate of 25-100% of its rated capacity, to within a tolerance of ±5%. It employs the following general principle to generate steam – when
water in the steam cylinder makes contact with energized electrodes, electric current flows between the
electrodes through the water. The resistance to the flow of electrical current heats the water and turns
it into steam. The amount of heat generated is controlled by regulating the current draw.
Two factors affect the current draw:
•
Surface area of the electrode in contact with the water – the current draw increases as more of the
electrode is in contact with the water.
•
Total dissolved solids (TDS) in the water – higher TDS results in increased conductivity of the water,
but when the concentration level reaches a saturation point the current draw begins to level off. Low
TDS may prevent proper operation of the unit.
The fill valve stops filling the steam cylinder when the current draw reaches the optimal level (Fill Off
Amps) for the requested level of humidity. As the water continues to heat and evaporate, the current
draw starts to drop off as less electrode is exposed to the water. When the current draw drops down
to 80% of the Fill Off Amps level, the fill valve starts filling the cylinder. Refer to Figure 4. The humidifier
continues this cycle to fulfil the humidity demand.
Filling Off
Current Level
Filling On
Time
Boil-down
(optimal)
Fill
Boil-down Drain
(fast)
Figure 4: Humidifier Fill-Boil-Drain Operation
As boiling continues, the concentration of TDS increases in the cylinder. This causes the current draw
to increase, which results in faster boil-down time. To maintain efficiency, the Nortec EL humidifier
utilizes the Auto-adaptive Control algorithm (refer to "Drain Cycles" on page 18) based upon the trending
boil-down cycles to perform a drain cycle in order to maintain the concentration of TDS at an optimum
level. This algorithm permits better adaptation to various water conditions and ensures that the steam
cylinder is only drained when necessary, thus minimizing wastage of water and maintaining optimum
operating conditions.
If the unit is not operated for three days, the humidifier drains automatically to prevent growth of organic
matter in the steam cylinder.
Eventually, the minerals dissolved in the water build up as scale deposits on the electrodes, which
reduces its efficiency and shortens the cylinder life (refer to "Steam Cylinders" on page 20 for additional
details). When this happens, the steam cylinder is easily removed and replaced.
Nortec EL
2577597_D_EN_1812_Nortec-EL_EM
Operation
15
2.2
Sequence of Operation
The following is a general sequence of operation – the actual sequence may vary depending upon operating conditions and user-configurable parameters. Refer to Figure 5 on page 17.
1. When the humidifier receives a valid humidity demand signal, the contactor(s) closes and directs
power to the electrodes in the steam cylinder(s).
2. The current sensor on the driver board then monitors the current draw for 60 seconds.
If the current draw is less than the optimal current draw for the requested level of humidity, and the
high water sensor is not activated, the operating sequence continues to step 3. If the high water sensor is activated, the operating sequence skips to step 4.
If the measured current draw is higher than the optimal current draw for the requested level of humidity, but does not exceed 115% of the Full Load Amps (Full Load Amps is the current draw at the
full rated capacity of the unit), the operating sequence skips to step 5.
3. The humidifier displays the status message “Filling” and activates the fill valve, which causes feed
water to flow through the fill valve into the fill cup. The water then flows from the fill cup into the steam
cylinder through the stem at the bottom of the cylinder.
As soon as the electrodes come in contact with the water, current begins to flow between the electrodes, generating heat. As the water level continues to rise, more surface of the electrodes come
in contact with the water, which results in a higher current draw. The fill valve remains open until
the current draw matches the optimal current draw for the requested level of humidity, or the high
water sensor is activated.
4. Once the fill/drain cycles stop, the water in the cylinder continues to heat until it turns into steam.
As water level in the steam cylinder drops due to evaporation, the surface area of the electrodes
exposed to the conductive water is also reduced, which results in a lower current draw.
If the filling cycle in step 3 was interrupted by activation of the high water sensor, the operating sequence returns to step 2 once the water level drops below the high water sensor pin. Otherwise, it
continues onto step 5.
5. As the humidifier continues to operate, the current draw begins to decrease due to a combination
of two factors related to evaporation – reduced surface area of electrodes in contact with the water,
and the increased concentration of TDS in the water. To offset this, the control software measures
the time for the current draw to decrease across a predetermined threshold (refer to "Drain Cycles" on
page 18), and performs the following action:
a. If the time for the boil-down cycle is shorter than optimal, the Auto-adaptive Control algorithm
initiates a drain cycle to replace some of the concentrated water in the steam cylinder with fresh
water in order to lower the concentration levels of TDS. The fill valve is active during this drain
cycle to lower the temperature of the waste water to below 140 °F (60 °C).
b. If the time for the boil-down cycle is optimal or longer, the humidifier does not perform a drain
cycle to lower the concentration levels of TDS.
6. The operating sequence loops back to step 2 and continues steam production as long as there is a
valid humidity demand signal.
16
Operation
2577597_D_EN_1812_Nortec-EL_EM
Nortec EL
1
16
2
5
1
1
F3 4AT
MAIN SUPPLY
L1
QC2
X1
L1SW
SWITCH
LEVEL SENS.
QC1
N
L1FU
INLET
N SC1 SC2 PE PE
L1SC NSW
JP1
NSW
CONT. SIGN.
1
L1SC
X2
X5
X4
X6
L1SW L1SW NSW
SPARE/DRAIN CONTACT.
4
P1
X7
P
N
MODULE B
PE
1
3
15
CONT.
INLET
1
DRAIN SPARE
SC OK
IN
24V
ON/OFF
1
IN
X12
24V
X9
1
IN GND
LIM. SIGN. BLOWER
1
IN GND
10V
1
X8
JP3
24V
RS4851
RS4852
GND D+ D-
X15
X14
X13
V+
SW1
LEVEL
LOW 24V GND
PWR IC
24V GND GND D+ D-
1
1
HB OK
CURRENT SENSOR
HWS
DRIVER
BOARD A
SPARE1 SPARE2 T1
14
X11
F1 1AT
COMM
1
6
T3 T2 T1
L3 L2 L1
13
8
12
7
11
10
9
Figure 5: Humidifier Schematic
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Nortec EL
Steam distributor
Condensate drain line
Fill cup
Current sensor
Driver board
Contactor
Fill valve
Overflow
Air gap funnel
Drain canal
Drain valve
Steam cylinder
Electrodes
High water sensor
Air gap
Steam line
2577597_D_EN_1812_Nortec-EL_EM
Operation
17
2.3
Drain Cycles
Minerals dissolved in the water can accumulate in the steam cylinder over time and reduce its efficiency
and shorten cylinder life. To minimize this, the Nortec EL humidifier utilizes the Auto-adaptive Control
algorithm to initiate a drain cycle that dilutes the concentration of mineral in the cylinder only when required, and only drains a minimum volume of water to maintain optimal operating conditions.
2.3.1
Drain Cycle Activation
Once the humidifier has achieved the desired current draw, the water in the cylinder will evaporate reducing the water level, and therefore the current draw. This reduction in current draw will happen at different
speeds depending upon the conductivity and volume of the water. More dissolved minerals will reduce
the resistance of the water and allow for a smaller volume of water to maintain the same heat production/
evaporation rate as a larger volume of lower conductivity water. The water level change associated with
evaporating the smaller volume of more conductive water will have a greater impact on current draw,
and therefore reduce the current draw faster with higher conductivity water. The integrated control board
monitors the time required for the current draw to cross a pre-determined threshold.
•
If the Actual Time (Ta) for the boil-down across the predetermined thresholds is longer than the predetermined Optimal Time (To), it indicates that the water has not yet accumulated excessive amounts
of minerals, and hence a mineral dilution drain is not yet required.
•
If the Actual Time (Ta) is shorter than a predetermined Optimal Time (To) it indicates that the water
has accumulated an excessive amount of dissolved minerals, and hence a demineralization drain
is initiated. Refer to Figure 6.
Current and
Water Level
A
B
Time
Ta = To
Ta > To
Optimal
Conductivity
Low
Conductivity
Ta < To
High
Conductivity
Drain
Figure 6: Conductivity Measurement
18
Operation
2577597_D_EN_1812_Nortec-EL_EM
Nortec EL
2.3.2
Drain Volume
The volume of water that must be drained is calculated by the Auto-adaptive Control algorithm. This
algorithm establishes a proportional drain component based on the difference between the actual time
of the latest boil-down cycle (Ta) minus an optimal time (To). It then adds an integral drain component
accumulated from previous drain cycles that will increase or decrease subsequent drain cycles, ensuring
more stable prolonged operation.
In cases where a long drain is required the Auto-adaptive Control algorithm breaks the drain time down
into several small drains to prevent a reduction in the humidifier output capacity, that would otherwise
result from a long drain. During these multiple partial drains, the fill valve is energized to assist in reducing the drain water temperature below 140 °F (60 °C), and at the same time the drain valve is energized.
Refer to Figure 7.
Current and
Water Level
A
B
Time
– Drain
– Fill
Ta < To
High
Conductivity
Figure 7: Multiple Short Drains
Nortec EL
2577597_D_EN_1812_Nortec-EL_EM
Operation
19
2.4
Steam Cylinders
The steam cylinder is the water reservoir for the humidifier. It consists of a plastic canister with a steam
outlet, water inlet/outlet with strainer, separators and mounts for various electrodes to be immersed into
the water. The Nortec EL humidifier ships with the standard cylinder listed in Table 8 on page 24, Table 9 on
page 26 and Table 10 on page 27. The standard cylinder has been developed for optimum performance
in the conductivity range of most potable water systems 330-670 µSiemens/cm (µS/cm). If required,
the humidifier can be easily adapted to operate with water conductivities outside this ideal range. This
allows for operation with a total range of 150-1200 µS/cm.
Consult your local Condair representative for details on adapting the humidifiers operation to accommodate water conductivity outside the standard operating range.
Low Conductivity Cylinder
For improved operation using potable water between 150 and 330 µS/cm, select a lower conductivity
cylinder. Note: An alternate for the 200 series cylinders is not available for units operating at 208-277 V.
High Conductivity Cylinder
For improved operation on potable water between 670 and 1200 µS/cm, select a higher conductivity
cylinder. Note: An alternate steam cylinder is not available for units operating at 480-600 V.
2.4.1
Water Conditions Versus Cylinder Life
The atmospheric steam output of the humidifier is pure and clean steam. During operation, the dissolved
minerals in the water supply are left behind in the cylinder. Much of these minerals will be removed during
periodic drain cycles of the cylinder (for drain frequencies refer to "Drain Cycles" on page 18).
Figure 8 generalizes the effect of water hardness, and demand on cylinder life. Cylinder life is ultimately
determined by the water chemistry, the unit running time, and steam output capacity setting.
Cylinder Life Expectancy
Electrode Drain Rate vs.
Water Conductivity with
Auto-Adaptive Control
Capacity adjustment setting
30
50%
25%
500
10
100
500
1000
2000
4000
8000
Conductivity of Water (μS/cm)
Grains of Hardness
200
CaCO3 mg/L (ppm)
400
20
5
1200
900
800
700
1000
600
800
500
600
400
300
400
200
200
0
100
0%
Average Operating Hours
20%
40%
60%
80%
Total Dissolved Solids (ppm)
100%
0
100%
Drain Rate
Note: Other parameters may affect cylinder life.
(As a percentage of steam output)
Figure 8: Water Conditions vs. Steam Cylinder Life and Drain Rates
20
Operation
2577597_D_EN_1812_Nortec-EL_EM
Nortec EL
2.4.2
Output Versus Cylinder Life
The Nortec EL humidifier maintains full output capacity for the full life of the cylinder. Figure 9 illustrates
the expected end-of-cylinder-life performance. As minerals build up on the electrodes in the cylinder, the
patented Auto-adaptive Control algorithm automatically raises the water level slightly in the cylinder. This
exposes fresh electrode surface to water and maintains peak output and efficiency from the humidifier.
Once the electrode surface is completely electrically insulated, the user is alerted to replace the cylinder.
The performance of other competitive humidifiers may degrade gradually as the minerals adhere to the
cylinder. By increasing the water level to expose fresh electrode surface, the Nortec EL humidifier will
maintain maximum output throughout its cylinder life.
Percent of Full Steam Output
100%
80%
60%
Humidifiers maintain full output throughout its life
40%
Typical output of other competitive humidifiers. Ability to
produce steam decreases throughout its life.
.
20%
0%
New
¾
½
¼
Replace
Cylinder Life
Figure 9: Steam Output vs. Steam Cylinder Life
Nortec EL
2577597_D_EN_1812_Nortec-EL_EM
Operation
21
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22
Operation
2577597_D_EN_1812_Nortec-EL_EM
Nortec EL
3
Product Specifications
3.1
Model Specifications
3.1.1
Model Designation
The specification label on the side (and the underside) of the Nortec EL humidifier shows its model
number, serial number and ratings – refer to Figure 2 on page 10. The breakdown of the model number
is shown in Figure 10.
Nortec EL Space 100 480V/3~
Product series:
Model:
Blank = Duct
Space = with Blower Pack
RM
= with power for remote-mounted Blower Pack
Steam capacity (lb/h):
Heating voltage and phase:
Figure 10: Model Number Breakdown
Nortec EL
2577597_D_EN_1812_Nortec-EL_EM
Product Specifications
23
3.1.2
Nortec EL Specifications
The Nortec EL humidifier is available in a range of output capacities, voltages and configurations. Refer
to Table 8 on page 24 for the Nortec EL (Duct) specifications, Table 9 on page 26 for the Nortec EL Space
specifications, and Table 10 on page 27 for Nortec EL RM specifications.
In addition, the short-circuit current rating (SCCR) for all Nortec EL humidifiers is 5 kA. With the internal
primary fusing option (refer to Table 2 on page 8), the SCCR is 100 kA.
Table 8: Nortec EL Specifications
Phase
Voltage
V
Amperage
A
5 (2.2)
110-120
15.6
20
1.9
208
18.0
25
3.7
220-240
15.6
20
3.7
277
13.5
20
3.7
380
9.0
15
3.7
440-480
7.8
15
3.7
550-600
6.2
15
3.7
10 (4.5)
SinglePhase
20 (9)
20 (9)
30 (14)
ThreePhase
50 (23)
75 (34)
100 (45)
24
Product Specifications
Maximum
Standard
External Wattage
Steam
Fuse
kW
Cylinder
A
Steam
Capacity
lb/h (kg/h)
208
36.0
45
7.5
220-240
31.2
40
7.5
277
27.0
35
7.5
380
18.0
25
7.5
440-480
15.6
20
7.5
550-600
12.5
20
7.5
208
20.8
25
7.5
220-240
18.0
25
7.5
380
10.4
15
7.5
440-480
9.0
15
7.5
550-600
7.2
15
7.5
208
31.1
40
11.2
220-240
27.0
35
11.2
380
15.6
20
11.2
440-480
13.5
20
11.2
550-600
10.8
15
11.2
208
51.9
70
18.7
220-240
45.0
60
18.7
380
26.0
35
18.7
440-480
22.5
30
18.7
550-600
18.0
25
18.7
208
77.9
100
28.1
220-240
67.5
90
28.1
380
39.0
50
28.1
440-480
33.7
45
28.1
550-600
27.0
35
28.1
208*
93.4
125
33.7
220-240
90.0
125
37.4
380
52.0
70
37.4
440-480
45.0
60
37.4
550-600
36.0
45
37.4
2577597_D_EN_1812_Nortec-EL_EM
Fill Rate
gpm
(L/min)
Drain Rate Net/Full Opergpm
ating Weight
(L/min)
lb (kg)
202
45/55
(21/25)
203
204
321
0.2 (0.8)
1.6
(6.1)
305
309
45/65
(21/30)
303
311
421
407
0.3
(1.2)
1.7
(6.4)
0.5
(2.0)
2.0
(7.6)
45/80
(21/37)
411
621
603
605
621
85/150
(39/68)
603
605
621
603
0.9
(3.3)
2.3
(8.7)
605
Nortec EL
Table 8: Nortec EL Specifications, continued...
Phase
Capacity
lb/h (kg/h)
150 (68)
ThreePhase
200 (91)
Maximum
Standard
External Wattage
Steam
Fuse
kW
Cylinder
A
Voltage
V
Amperage
A
208
155.7
200
56.1
220-240
135.0
175
56.1
380
78.0
100
56.1
440-480
67.5
90
56.1
550-600
54.0
70
56.7
208***
186.9
250
67.3
220-240
180.0
225
74.8
380
104.1
150
74.8
440-480
90.0
125
74.8
550-600
72.0
90
74.8
Fill Rate
gpm
(L/min)
Drain Rate Net/Full Opergpm
ating Weight
(L/min)
lb (kg)
621
603
0.5**
(2.0**)
2.0**
(7.6**)
605
120/245
(55/112)
621
603
0.9**
(3.3**)
2.3**
(8.7**)
605
*
Steam capacity for Nortec EL 100 unit running on 208V/3~ is 90 lb/h (41 kg/h)
** Per steam cylinder
*** Steam capacity for Nortec EL 200 unit running on 208V/3~ is 180 lb/h (82 kg/h)
Nortec EL
2577597_D_EN_1812_Nortec-EL_EM
Product Specifications
25
Table 9: Nortec EL Space Specifications
Phase
Voltage
V
Amperage
A
5 (2.2)
110-120
16.8
25
2.0
10 (4.5)
SinglePhase
20 (9)
20 (9)
30 (14)
ThreePhase
50 (23)
75 (34)
100 (45)
*
26
Maximum
Standard
External Wattage
Steam
Fuse
kW
Cylinder
A
Capacity
lb/h (kg/h)
208
18.7
25
3.9
220-240
16.2
25
3.9
277
14.0
20
3.9
380
9.4
15
3.9
440-480
8.1
15
3.9
550-600
6.5
15
3.9
208
36.7
50
7.6
220-240
31.8
40
7.6
277
27.5
35
7.6
380
18.4
25
7.6
440-480
15.9
20
7.6
550-600
12.7
20
7.6
208
21.5
30
7.7
220-240
18.6
25
7.7
380
10.8
15
7.7
440-480
9.3
15
7.7
550-600
7.4
15
7.7
208
31.9
40
11.5
220-240
27.6
35
11.5
380
16.0
20
11.5
440-480
13.8
20
11.5
550-600
11.0
15
11.5
208
52.6
70
19.0
220-240
45.6
60
19.0
380
26.4
35
19.0
440-480
22.8
30
19.0
550-600
18.2
25
19.0
208
78.6
100
28.3
220-240
68.1
90
28.3
380
39.4
50
28.3
440-480
34.1
45
28.3
550-600
27.2
35
28.3
208*
94.2
125
33.9
220-240
90.6
125
37.7
380
52.4
70
37.7
440-480
45.3
60
37.7
550-600
36.2
50
37.7
Fill Rate
gpm
(L/min)
Drain Rate Net/Full Opergpm
ating Weight
(L/min)
lb (kg)
202
83/93
(38/42)
203
204
321
0.2 (0.8)
1.6
(6.1)
305
309
83/103
(38/47)
303
311
421
407
0.3
(1.2)
1.7
(6.4)
0.5
(2.0)
2.0
(7.6)
83/118
(38/54)
411
621
603
605
621
123/188
(56/85)
603
605
621
603
0.9
(3.3)
2.3
(8.7)
605
Steam capacity for Nortec EL Space 100 unit running on 208V/3~ is 90 lb/h (41 kg/h)
Product Specifications
2577597_D_EN_1812_Nortec-EL_EM
Nortec EL
Table 10: Nortec EL RM Specifications
Phase
Voltage
V
Amperage
A
5 (2.2)
110-120
16.8
25
2.0
10 (4.5)
SinglePhase
20 (9)
20 (9)
30 (14)
ThreePhase
50 (23)
75 (34)
100 (45)
Nortec EL
Maximum
Standard
External Wattage
Steam
Fuse
kW
Cylinder
A
Capacity
lb/h (kg/h)
208
18.7
25
3.9
220-240
16.2
25
3.9
277
14.0
20
3.9
380
9.4
15
3.9
440-480
8.1
15
3.9
550-600
6.5
15
3.9
208
36.7
50
7.6
220-240
31.8
40
7.6
277
27.5
35
7.6
380
18.4
25
7.6
440-480
15.9
20
7.6
550-600
12.7
20
7.6
208
21.5
30
7.7
220-240
18.6
25
7.7
380
10.8
15
7.7
440-480
9.3
15
7.7
550-600
7.4
15
7.7
208
31.9
40
11.5
220-240
27.6
35
11.5
380
16.0
20
11.5
440-480
13.8
20
11.5
550-600
11.0
15
11.5
208
52.6
70
19.0
220-240
45.6
60
19.0
380
26.4
35
19.0
440-480
22.8
30
19.0
550-600
18.2
25
19.0
208
78.6
100
28.3
220-240
68.1
90
28.3
380
39.4
50
28.3
440-480
34.1
45
28.3
550-600
27.2
35
28.3
208*
94.2
125
33.9
220-240
90.6
125
37.7
380
52.4
70
37.7
440-480
45.3
60
37.7
550-600
36.2
50
37.7
2577597_D_EN_1812_Nortec-EL_EM
Fill Rate
gpm
(L/min)
Drain Rate Net/Full Opergpm
ating Weight
(L/min)
lb (kg)
202
45/55
(21/25)
203
204
321
0.2 (0.8)
1.6
(6.1)
305
309
45/65
(21/30)
303
311
421
407
0.3
(1.2)
1.7
(6.4)
0.5
(2.0)
2.0
(7.6)
45/80
(21/37)
411
621
603
605
621
85/150
(39/68)
603
605
621
603
0.9
(3.3)
2.3
(8.7)
605
Product Specifications
27
Table 10: Nortec EL RM Specifications, continued...
Phase
Capacity
lb/h (kg/h)
150 (68)
ThreePhase
200 (91)
Maximum
Standard
External Wattage
Steam
Fuse
kW
Cylinder
A
Voltage
V
Amperage
A
208
156.9
200
56.5
220-240
136.0
175
56.5
380
78.6
100
56.5
440-480
68.0
90
56.5
550-600
54.4
70
56.5
208***
188.1
250
67.8
220-240
181.0
250
75.2
380
104.7
150
75.2
440-480
90.5
125
75.2
550-600
72.4
100
75.2
Fill Rate
gpm
(L/min)
Drain Rate
gpm
(L/min)
0.5**
(2.0**)
2.0**
(7.6**)
Net/Full
Weight
lb (kg)
621
603
605
120/245
(55/112)
621
603
0.9**
(3.3**)
2.3**
(8.7**)
605
*
Steam capacity for Nortec EL RM 100 unit running on 208V/3~ is 90 lb/h (41 kg/h)
** Per steam cylinder
*** Steam capacity for Nortec EL RM 200 unit running on 208V/3~ is 180 lb/h (82 kg/h)
28
Product Specifications
2577597_D_EN_1812_Nortec-EL_EM
Nortec EL
3.2
Specification Drawings
16.5
( 420 )
Empty Weight
45 lbs
Full Weight
55 lbs
Front Clearance
36 in.
Ceiling Clearance
12 in.
Left/Right Clearance
0 in.
Floor Clearance
24 in.
Water Inlet Pressure
30-80 psig
2.1
( 54 )
.6
( 14 )
8.3
14.3 ( 211 )
( 364 )
Optional, Steam
Outlet (Cylinder)
0.875 (22)
12.0
( 305 )
3.2
( 80 )
13.2
( 336 )
Condensate Return
0.375 (9.5)
2.2
11.7
( 56 )
( 296 )
14.3
( 364 )
.3
(8)
17.6
( 446 )
26.4
( 670 )
Mounting Keyhole
2x0.25 (6.5)
2.3
( 58 )
12.0
( 305 )
2.1
( 54 )
2.3
( 58 )
Drain Connection
1.18 (30)
7.6
( 194 )
Optional
Mounting Bracket
Fill Connection
1/2 NPT
Primary
Power
1.7
( 42 )
9.1
( 230 )
3.6
( 91 )
ALL UNITS IN INCHES (mm)
13.0
( 329 )
2.8
( 72 )
14.5
( 369 )
Figure 11: Nortec EL 005-030 Physical Data and Dimensions
EL Small (005 to 030)
Physical Data & Dimensions
Rev A
22-Oct-2015
Nortec EL
2577597_D_EN_1812_Nortec-EL_EM
Product Specifications
29
.6
( 15 )
Empty Weight
85 lbs
Full Weight
150 lbs
Front Clearance
36 in.
Ceiling Clearance
12 in.
Left/Right Clearance
0 in.
Floor Clearance
24 in.
Water Inlet Pressure
30-80 psig
3.5
( 89 )
2.1
( 54 )
16.0
( 406 )
20.9
( 530 )
17.6
( 446 )
8.9
( 226 )
15.7
( 400 )
Optional, Steam
Outlet (Cylinder)
1.75 (45)
Condensate Return
0.375 (9.5)
17.6
( 446 )
13.8
( 351 )
15.7
( 400 )
1.4
( 36 )
.3
(8)
20.7
( 526 )
30.7
( 780 )
2.1
( 54 )
Mounting Keyhole
2x0.25 (6.5)
2.4
16.0
( 62 )
( 406 )
7.6
( 194 )
14.9
( 380 )
Primary
Power
Drain Connection
1.18 (30)
Optional
Mounting Bracket
1.3
( 32 )
9.2
( 233 )
3.6
( 91 )
Fill Connection
1/2 NPT
Figure 12: Nortec EL 050-100 Physical Data and Dimensions
2.4
( 62 )
18.9
( 479 )
ALL UNITS IN INCHES (mm)
EL Medium (050 to 100)
Physical Data & Dimensions
Rev A
22-Oct-2015
30
Product Specifications
2577597_D_EN_1812_Nortec-EL_EM
Nortec EL
Empty Weight
120 lbs
Full Weight
245 lbs
Front Clearance
36 in.
Ceiling Clearance
12 in.
Left/Right Clearance
0 in.
Floor Clearance
24 in.
Water Inlet Pressure
30-80 psig
.6
( 14 )
14.0
( 356 )
39.4
( 1000 )
8.9
15.7 ( 226 )
( 400 )
Optional, Steam
Outlet (Cylinder)
1.75 (45)
Condensate Return
0.375 (9.5) x 2
16.0
( 406 )
16.0
( 406 )
22.8
( 580 )
2.8
( 70 )
18.3
( 465 )
14.0
( 356 )
15.7
( 400 )
6.5
( 164 )
1.4
( 36 )
.3
(8)
16.8
( 426 )
30.7
( 780 )
Mounting Keyhole
3x0.25 (6.5)
Optional
Mounting Bracket
6.0
( 151 )
13.9
( 353 )
Drain Connection
1.18 (30) x 2
Primary
Power
9.6
( 244 )
2.6
( 66 )
9.1
( 232 )
4.6
( 117 )
16.0
( 406 )
16.0
( 406 )
2.8
( 70 )
3.5
( 89 )
Fill Connection
1/2 NPT, x 2
Figure 13: Nortec EL 150-200 Physical Data and Dimensions
4.4
( 111 )
14.0
( 357 )
23.3
( 592 )
ALL UNITS IN INCHES (mm)
EL Large (150 to 200)
Physical Data & Dimensions
Rev A
22-Oct-2015
Nortec EL
2577597_D_EN_1812_Nortec-EL_EM
Product Specifications
31
Empty Weight
83 lbs
Full Weight
113 lbs
Front Clearance*
005-010: 6 in. | 020: 60 in. | 030: 71 in.
Ceiling Clearance*
12 in.
Left/Right Clearance*
12 in.
Floor Clearance*
96 in. (to bottom of blower pack)
Water Inlet Pressure
30-80 psig
14.4
( 365 )
Mounting Keyhole
2x0.25 (6.5)
16.5
( 418 )
15.8
( 400 )
.5
( 12 )
10.9
( 277 )
35.2
( 893 )
17.6
( 446 )
3.2
( 80 )
12.0
( 305 )
1.4
( 35 )
Drain Connection
1.18 (30)
16.4
( 417 )
3.6
( 91 )
Fill Connection
1/2 NPT
12.0
( 305 )
2.3
( 58 )
Primary
Power
1.6
( 40 )
9.0
( 229 )
Optional
Mounting
Bracket
2.3
( 58 )
13.0
( 329 )
2.8
( 72 )
14.5
( 369 )
* Clearances with blower pack on HIGH
Figure 14: Nortec EL Space 005-030 Physical Data and Dimensions
ALL UNITS IN INCHES (mm)
EL Small Space (005 to 030)
Physical Data & Dimensions
Rev A
22-Oct-2015
32
Product Specifications
2577597_D_EN_1812_Nortec-EL_EM
Nortec EL
20.9
( 530 )
Empty Weight
123 lbs
Full Weight
188 lbs
Front Clearance*
050: 132 in. | 075: 153 in. | 100: 218 in.
Ceiling Clearance*
12 in.
Left/Right Clearance*
050: 12 in. | 075-100: 30 in.
Floor Clearance*
96 in. (to bottom of blower pack)
Water Inlet Pressure
30-80 psig
15.7
(400)
16.5
( 418 )
2.2
( 56 )
16.3
( 415 )
10.4
( 265 )
.5
( 12 )
Mounting
Keyhole
2x 0.25 (6.5)
20.7
( 526 )
3.5
( 89 )
16.0
( 406 )
39.5
( 1003 )
1.4
( 35 )
14.9
( 380 )
Drain Connection
1.18 (30)
16.4
( 417 )
Primary
Power
1.3
( 32 )
9.1
( 232 )
Optional
Mounting Bracket
3.6
( 91 )
Fill Connection
1/2 NPT
2.4
( 62 )
16.0
( 406 )
2.4
( 62 )
2.4
( 62 )
18.9
( 479 )
* Clearances with blower pack on HIGH
Figure 15: Nortec EL Space 050-100 Physical Data and Dimensions
ALL UNITS IN INCHES (mm)
EL Medium Space (050 to 100)
Physical Data & Dimensions
Rev A
22-Oct-2015
Nortec EL
2577597_D_EN_1812_Nortec-EL_EM
Product Specifications
33
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34

2577597_D_EN_1812_Nortec-EL_EM
Nortec EL
4
Planning
This chapter contains planning information for selecting the location, as well as provisioning of services
for the Nortec EL humidifier. It also describes the installation requirements for mounting, plumbing,
electrical and steam connections. Design of the control systems and preventative maintenance for the
Nortec EL humidifier are also discussed.
4.1
Location and Clearances
When selecting the location of the humidifier, choose a location that is close as possible to the steam
distributor. This will minimize heat loss through the steam line. Locate the humidifier below the steam
distributor, when possible.
Allow adequate clearances around the humidifier for ease of maintenance. Although the Nortec EL
humidifier requires no side clearance, Condair recommends minimum clearances of 6 in (150 mm)
on the side. A clearance of 24 in (610 mm) between the humidifier and the ground is also required.
Refer to Figure 16 and Table 11 on page 36, which also show the clearances required for the Nortec EL
Space unit. Observe all local and national installation codes. Condair is not responsible for any
installation code violations.
Refer to the Blower Pack Installation, Operation and maintenance Manual (document 2582277) for
clearances required for remote-mounted blower packs. All Nortec documents are available from
www.humidity.com.
The selected location should permit proper routing of services, as well as steam and condensate lines.
The Nortec EL humidifier should only be installed in a drip-proof location within buildings, where the
ambient temperature is 41-104 °F (5-40 °C) and the relative humidity is 5-95% (non-condensing).
2
D
min. 12 in
(300 mm)
D
0 in m)
(0 m
B
A
0 in m)
(0 m
min
(91 . 36 i
5m n
m)
C
min. 24 in
(610 mm)
1
Figure 16: Location and Clearances
1
2
Nortec EL
Nortec EL humidifier
Nortec EL Space humidifier (with built-on blower pack)
2577597_D_EN_1812_Nortec-EL_EM
Planning
35
Table 11: Minimum Clearances for Blower Packs
Steam
Capacity
lb/h (kg/h)
Blower Pack
Speed Setting
Min. Frontal
Clearance –
"A"
in (m)
Min. Overhead
Clearance –
"B"
in (m)
Low
9 (0.23)
12 (0.31)
High
6 (0.16)
12 (0.31)
5 (2.3)
10 (4.5)
20 (9)
30 (13.5)
50 (22.5)
75 (34)
100 (45)
Low
18 (0.46)
12 (0.31)
High
6 (0.16)
12 (0.31)
Low
75 (1.91)
12 (0.31)
High
60 (1.53)
12 (0.31)
Low
86 (2.19)
12 (0.31)
High
71 (1.81)
12 (0.31)
Low
174 (4.42)
12 (0.31)
High
132 (3.36)
12 (0.31)
Low
189 (4.81)
48 (1.22)
High
153 (3.89)
12 (0.31)
Low
248 (6.30)
84 (2.14)
High
218 (5.54)
12 (0.31)
Min. Height
Suggested
Above Ground Left Side Clear– "C"
ance – "D"
in (m)
in (m)
Suggested
Right Side
Clearance –
"D"
in (m)
12 (0.31)
90 (2.3)
30 (0.77)
Data based upon nominal conditions 72 °F (22 °C), 40% RH.
Note: The High speed setting on the blower pack permits shorter absorption distances, whereas the Low setting permits the blower to run
quieter but requires longer absorption distances. Visit www.NortecHelp.com and use the free online program - Humidifier Engineering
and Load-sizing Program (H.E.L.P.) to assist with absorption distance and other calculations.
4.2
Services
Water Supply
Water supply to the humidifier must be cold potable drinking water, and not reverse osmosis (RO)
or deionized (DI) water. The water quality requirements are listed in Table 12 below.
Table 12: Water Quality Requirements
Conductivity
(μS/cm)
Hardness
(gpg)
Silica
(ppm)
Alkalinity
(pH)
150-1200*
0-12
0-4
7-7.5
0-3
4-14
* Default humidifier configuration supports approximately 330-670 μS/cm.
The water supply should also be free of additives such as corrosion inhibitors, disinfectants, etc.,
which may affect the performance of the humidifier.
The water supply should have a minimum flow rate of 0.9 gpm (3.3 L/min), and should be pressure
regulated to 30-80 psig (207-550 kPa), with spike pressure limited to 120 psig (827 kPa).
Water temperature should be 34-104 °F (1-40 °C).
The water supply should be filtered to 5 μm (optional, but recommended).
The diameter of the water supply piping should be 1/2 in, and must have a 1/2 in NPT female end.
The water supply line should be made of copper, stainless steel or plastic certified for drinking water
systems.
A shutoff valve and a union fitting must be supplied in the water supply line for ease of maintenance.
36
Planning
2577597_D_EN_1812_Nortec-EL_EM
Nortec EL
Drainage
The humidifier should be connected to a dedicated building drain (recommended) with a minimum
drainage rate of 2.3 gal/min (8.7 L/min) per steam cylinder. For safety reasons, drain water from the
humidifier should not empty into a sink used by personnel. The drain line must allow free and easy
draining. A restricted drain can cause water in the humidifier to over-concentrate and result in poor
operation, or cause water to back up at the air gap funnel. Refer to "Water and Drainage Connections" on
page 39.
The building drain pipe should be made of either copper or stainless steel (minimum DIN 1.4301)
so it can handle drain water temperatures up to 212 °F (100 °C).
The space in which the humidifier is to be installed should have a floor drain. However, if a floor drain
is not available, a leakage monitoring device must be supplied to permit interruption of the water
supply in case of a leakage.
Power Supply
The power supply to the humidifier should match the full voltage and current draw listed in the specifications. Refer to Table 8 on page 24 for the Nortec EL power requirements, Table 9 on page 26 for the
Nortec EL Space power requirements, and Table 10 on page 27 for Nortec EL RM power requirements.
The power supply must have an external dedicated fused disconnect switch. The fusing must not
exceed the maximum circuit protection listed in the tables referenced above.
Nortec EL
2577597_D_EN_1812_Nortec-EL_EM
Planning
37
4.3
Installation Requirements
4.3.1
Humidifier Mounting
The Nortec EL humidifier can be mounted on a wall or equivalent support using the keyholes on the
back of the unit. 1/4×2 lag bolts are used to secure the unit to 2×4 studs in the wall (or equivalent support). Refer to Figure 17.
The unit can also be mounted on the wall (or equivalent support) using the optional mounting bar. Refer
to the Nortec EL Installation Manual (document 2582302 available from www.condair.com) for other mounting details, including how to mount the unit to meet OSHPD (seismic) requirements.
The following is a list of installation requirements for mounting the Nortec EL humidifier:
The humidifier should not be mounted on hot surfaces, or surfaces that can freeze, or near vibrating
components, or on the floor. The Nortec EL Space units should not be installed near cold surfaces
or where the dew point may be reached.
The mounting surface must be able to withstand temperatures of 140-158 °F (60-70 °C) that can be
generated during operation of the humidifier.
The humidifier should be mounted on a wall or other suitable vertical surface that offers a sufficiently
high load-bearing capacity to support the full operating weight of the humidifier and accessories.
Refer to Table 8 on page 24 for the full weights of Nortec EL units, and Table 9 on page 26 for the
Nortec EL Space units.
The humidifier should not be used as a structural member. All piping connected to the unit must be
supported independently.
X
X
X
Y
Y
Figure 17: Standard Humidifier Mounting
Table 13: Keyhole Spacing
Housing Size
in (mm)
Dimension
38
Planning
Small
Medium
Large
X
12 (305)
16 (406)
16 (406)
Y
17.5 (446)
20.7 (526)
16.75 (426)
2577597_D_EN_1812_Nortec-EL_EM
Nortec EL
4.3.2
Water and Drainage Connections
The water and drain connections on the Nortec EL humidifier are located at the bottom of the unit. Refer
to Figure 18.
The flexible bent hose (supplied) connects a short length of 7/8 in (22 mm) drain line to the drain canal
on the humidifier. The drain hose then empties into an air gap funnel connected to the building drain.
The water supply line connects to the fill valve through a NPT-to-BSPP adaptor (supplied).
The following is a list of installation requirements for the water and drainage connections:
The drain line from the humidifier should be as short as possible, and empty into an air gap funnel
(with optional trap) before connecting to the building drain.
The drain line should have a constant minimum downslope of 1 in/48 in (1.2°) to the air gap funnel
without touching its sides or bottom.
The drain line should have a minimum inner diameter of 7/8 in (22 mm), and must be made of stainless steel, or copper pipe to handle temperatures up to 212 °F (100 °C).
The air gap funnel should be located away from the humidifier control cabinet to prevent rising steam
from damaging the electrical components in the cabinet.
Drain lines from large humidifiers with dual steam cylinders must empty into separate air gap funnels
before connecting to the drain. The combined drain line should have a minimum inner diameter of
1.5 in (38 mm).
All water supply and drain connections must be installed to local plumbing codes.
11
10
9
4
5
7
8
6
5
1
3
2
4
Figure 18: Nortec EL Water and Drain Connections
1
2
3
4
5
6
Nortec EL
Drain canal (un-threaded), 1-3/16 in (30 mm) O.D.
Hose clamp (supplied)
Flexible bent hose (supplied)
Drain line, minimum 7/8 in (22 mm) I.D. (not supplied)
Water supply line, 1/2 in (not supplied)
Adaptor, 3/4 BSPP to 1/2 in NPT (supplied)
7
8
9
10
11
2577597_D_EN_1812_Nortec-EL_EM
Fill valve (3/4 in BSPP plastic threads)
Air gap funnel with optional trap (not supplied)
Shutoff valve (not supplied)
Filter, 5 μm (optional, but recommended)
Union fitting (not supplied)
Planning
39
4.3.3
Steam Distribution
The steam generated by the Nortec EL humidifier can be distributed into the conditioned environment by
duct distributors installed on air handling units or within supply ducts, or through built-on blower packs
(Nortec EL Space humidifier) or remote-mounted blower packs. In all cases, the steam distributors must
have a dispersal capacity equal to or greater than the humidifier steam output.
Visit www.condairhelp.com and use the free online program - Humidifier Engineering and Loadsizing Program (H.E.L.P.) to assist you with absorption distance calculations, selection of
humidifiers, steam distributors, controls and accessories.
Additional information on the effects of humidity, relative humidity calculations, load calculations, and recommended design conditions can be found in the Humidification Load
Calculation Manual (document 2553856).
4.3.3.1
Duct Distributors
A variety of duct distributors are available for the Nortec EL humidifier to accomodate duct dimensions,
humidifier capacities and steam absorption distances. For more information on available duct distributor
systems refer to the documents listed in Table 14, which are available from www.condair.com.
Table 14: Duct Distributor Models
Model
Steam Capacity
lb/h (kg/h)
Duct Dimensions
in (mm)
Minimum**
Maximum**
ASD Tube
0-25*
(0-11)
10 (255)
66 (1675)
BSD Tube
0-35
(0-16)
12 (305)
102 (2590)
CSD Tube
0-115
(0-52)
24 (610)
138 (3503)
SAM-e
Maximum 1200**
(545)**
18×18 W
(457×457 W)
360×360 W
(9145×9145 W)
Mini SAM-e
Maximum 210**
(95)**
8×12 W
(203×305 W)
36x36 W
(914×914 W)
Condair Document
Number
2556592
1503529
* Max 22 lb/h (10 kg/h) for 10 in (255 mm) ASD tubes.
** Available in various standardized configurations.
The following is a list of installation requirements for duct distributors to ensure steam is properly absorbed, and condensation does not occur in the ducts:
Steam distribution capacity must be equal to or greater than the humidifier steam production capacity, less steam line condensate losses. Multiple distributors can be utilized, as needed.
Air flow in the duct across the distributor must be laminar over the entire calculated absorption
distance downstream of the distributor. Excessive turbulence may cause air stream collisions with
internal duct walls/components, which must be avoided.
The air velocity in the duct must be greater than 300 ft/min (92 m/min) to prevent steam migrating
to, and colliding with, the duct ceiling.
An air proving switch and high limit humidistat must be installed in the system. Refer to "Duct Distribution Control Design" on page 51.
Backpressure in the steam line combined with duct static pressure should not exceed exceed 5.5 in H2O
(1.37 kPa), or up to 10 in H2O (2.49 kPa) with the optional fill cup extension.
The atmospheric steam lines between the Nortec EL humidifier and the steam distributor must be
installed as described in "Atmospheric Steam and Condensate Lines" on page 42.
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Nortec EL
4.3.3.2
Blower Packs
Blower packs create an air stream to allow absorption of the atmospheric steam in the conditioned environment. Once the steam is absorbed, the humidity will disperse evenly throughout most conditioned
environments without the need of further mechanical assistance (except when mechanical obstructions,
localized variances in temperature, infiltrating air, or materials that have equalizing moisture effects on
the surrounding atmosphere are present). Refer to "Space Distribution Control Design" on page 53.
The Nortec EL Space humidifier comes fully factory-assembled with its own built-on blower pack (with
internal power supply, steam and condensate connections). The remote-mounted blower pack is capable
of dispersing 5-100 lb/h (2-45 kg/h) of steam, and requires an external 120 VAC, 15 A power supply, as
well as atmospheric steam line and condensate connections. Refer to Figure 19.
The blower pack has two speed settings – High speed setting which provides shorter absorption distances, and the Low speed setting which offers quieter operation but requires longer absorption distance.
For more information refer to the Blower Pack Installation Operation and Maintenance Manual (document 2582277, available fromwww.condair.com).
1
2
6
3
5
4
Figure 19: Blower Pack
1
2
3
4
5
6
Remote-mounted blower pack
Steam line – must rise straight up 12 in (300 mm) before any bends
Built-on (Space) blower pack
Air gap funnel connected to building drain
Condensate line (alternate) with trap for remote-mounted blower pack routed to building drain
Condensate line with trap for remote-mounted blower pack connected to humidifier fill cup
The following is a list of requirements for installing remote-mounted blower packs:
The atmospheric steam line must rise straight up 12 in (300 mm) from the Nortec EL humidifier
before continuing on to the blower pack. Other steam line installation requirements are described in
"Atmospheric Steam and Condensate Lines" on page 42.
The condensate line from the blower pack can be routed to either an external drain or the humidifier
fill cup. It must have a constant minimum downslope of 1.2°, with no restrictions. The condensate
trap should have a diameter of 4 in (100 mm) and must be located minimum 12 in (300 mm) below
the blower pack condensate port. The condensate line from small steam adaptors should have a
trap with diameter of 2 in (50 mm).
Nortec EL
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4.3.3.3
Atmospheric Steam and Condensate Lines
The Nortec EL humidifier can handle backpressures up to 5.5 in H2O (1.37 kPa), or up to 10 in H2O
(2.49 kPa) with the optional fill cup extension. When the combined effect of backpressure in the steam
line and the duct static pressure exceed this limit, it can adversely affect operation of the humidifier. The
steam line material, its diameter, length, slope and the number of bends in the line affect the backpressure, which must be considered carefully when planning. Other factors such as insulation of the steam
line to reduce efficiency losses caused by the formation of condensate, as well as condensate drainage
to permit free venting of steam must also be considered.
The following is an overview of the requirements for atmospheric steam and condensate lines. For more
details refer to “Best Practices for Installing Steam and Condensate Lines” in the Nortec EL Installation
Manual (document 2582302).
Steam Lines
Steam lines must be made of copper (MED Type-L) or stainless steel (minimum DIN 1.4301) exclusively. Use a Condair-supplied steam hose for short distances only. Steam lines made of any other
materials may adversely affect operation of the unit.
The length of the steam line and the number of bends in the line should be kept to a minimum to
minimize backpressure and reduce efficiency loss. The maximum recommended length of steam
line is listed in Table 15 on page 43.
Refer to Table 16 on page 43 for equivalent length of some common fittings when calculating total
equivalent length of the steam lines. Also refer to "Condensate Loss" on page 61 when calculating efficiency losses based on total equivalent length of the steam line.
The steam line should not have any restrictions, as it can increase backpressure. Backpressure
in the line combined with duct static pressure should not exceed 5.5 in H2O (1.37 kPa), or up to
10 in H2O (2.49 kPa) with the optional fill cup extension.
Steam lines (from Nortec EL 150/200 with dual steam cylinders or multiple humidifiers) should not
merge except at the steam distributor, and ONLY if the steam cylinders operate in parallel mode.
Refer to"Combining Steam Lines" on page 45.
The steam line should be connected to the steam outlet on the humidifier and the steam distributor
with short lengths of steam hose, and secured with hose clamps. Refer to Table 15 on page 43.
The steam line must be supported independently so there is no load on the humidifier.
The steam line must have a constant minimum upslope of 10°, or a constant minimum downslope
of 2°, as shown in Figure 20.
The steam line must be insulated with a minimum of 1 in (25 mm) pipe insulation over its entire
length to minimize the formation of condensate.
Minimum Upslope
Minimum Downslope
2 in
(50 mm)
12 in
(300 mm)
½ in
(12 mm)
10o
2
o
12 in
(300 mm)
Figure 20: Steam Line Slope
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Nortec EL
Table 15: Steam Line Recommendations
Steam Line
Model
Equivalent
Maximum
Steam Line
Length
NortecEL005
7 ft
(2 m)
NortecEL010
12 ft
(3.5 m)
NortecEL020
17 ft
(5 m)
NortecEL030
22 ft
(6.5 m)
NortecEL050
43 ft
(13 m)
NortecEL075
NortecEL100
47 ft
(14 m)
NortecEL150*
NortecEL200*
50 ft
(15 m)
Over-sized Steam Line**
Copper
Pipe (MED
Type-L)
Diameter
Stainless Steel
(min. DIN 1.4301)
Pipe Diameter
Equivalent
Maximum
Steam Line
Length
Copper
Pipe (MED
Type-L)
Diameter
Stainless Steel
(min. DIN 1.4301)
Pipe Diameter
Steam
Losses***
3/4 in
(20 mm)
7/8 in
× 0.049 wall
14 ft
(4 m)
1 in
(25 mm)
1-1/8 in
× 0.049 wall
0.06 lb/h/ft
(0.09 kg/h/m)
(22 mm
× 1.25 mm wall)
24 ft
(7 m)
(29 mm
× 1.25 mm wall)
34 ft
(10 m)
44 ft
(13 m)
1-1/2 in
(40 mm)
1-3/4 in
× 0.065 wall
86 ft
(26 m)
94 ft
(28 m)
(45 mm
× 1.65 mm
wall)
1-1/2 in
(40 mm)
2 in
(50 mm)
1-3/4 in
× 0.065 wall
100 ft
(30 m)
2 in
× 0.065 wall
0.11 lb/h/ft
(0.18 kg/h/m)
(50 mm
× 1.65 mm
wall)
2 in
(50 mm)
(45 mm
× 1.65 mm wall)
2 in
× 0.065 wall
(50 mm
× 1.65 mm
wall)
Condair Steam Hose
NortecEL005NortecEL030
10 ft
(3 m)
P/N 1328810 – 7/8 in (22 mm)
0.1 lb/h/ft
(0.15 kg/h/m)
NortecEL050NortecEL200
10 ft
(3 m)
P/N 1328820 – 1-3/4 in (45 mm)
0.15 lb/h/ft
(0.22 kg/h/m)
* Use a single steam line for each steam cylinder. Do not combine lines except at a distributor, and only if using the humidifiers in parallel mode.
** Over-sized lines may require a reducer at the humidifier and the steam distributor.
*** Based on 1 in (25 mm) insulated copper pipe.
Table 16: Approximate Equivalent Length of Atmospheric Steam Line Fittings
Nortec EL
Nominal
Tube Size
in (mm)
Standard 90°
Elbow
ft (m)
45° Elbow
ft (m)
Side-outlet
Tee
ft (m)
0.75-0.875
(19-22)
2 (0.6)
1 (0.3)
4 (1.2)
1.5-1.75
(38-45)
3.5 (1.1)
1.75 (0.5)
7 (2.1)
3 (76)
5 (1.5)
2.5 (0.8)
11 (3.4)
4 (102)
8 (2.4)
4 (1.2)
15 (4.6)
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43
Condensate Lines
Condensate line and trap must be made of 1/4 in copper (MED Type-L) or 3/8 in stainless steel
(minimum DIN 1.4301), or 3/8 in (9.5 mm) Condair condensate hose.
Condensate lines must connect into full size "Tee" fittings in the steam line. Refer to Figure 21.
Condensate lines must be installed at all low points in the steam line, and at horizontal-to-vertical
transitions in the steam line.
Condensate lines and traps must be installed at regular intervals on long steam runs, and the maximum distance between condensate lines is 15 ft (4.5 m). Refer to Figure 22 on page 45.
The condensate trap must be located a minimum of 12 in (300 mm) below the condensate port on
the steam distributor or the "Tee" fitting in the steam line. The trap diameter should be 8 in (200 mm).
The condensate drain line must have a constant minimum downslope of 1.2°, and may be connected
to the fill cup port on the top of the humidifier, or to the building drain.
Condensate from a SAM-e steam distributor or larger steam line should be connected to a drain
water cooler (if required by code) before emptying into the building drain.
Large volumes of condensate from multiple humidifiers or SAM-e systems should never be returned
to a single humidifier.
For safety reasons, condensate should not be routed to a sink used by personnel.
Individual condensate drain lines must be trapped independently before connecting into a single line.
Condensate lines should not have any restrictions, and all traps must be primed with water.
Min.
12 in
(300 mm)
8 in
(200 mm)
Min.
12 in
(300 mm)
1 in
(25 mm)
1.2
o
Minimum
Downslope
8 in
(200 mm)
48 in
(1.2 m)
1 in
(25 mm)
1.2
o
Minimum
Downslope
48 in
(1.2 m)
Figure 21: Condensate Drain Lines
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Nortec EL
Combining Steam Lines
The following is a list of installation requirements for combining steam lines:
Multiple steam lines (from a Nortec EL 150/200 with dual steam cylinders, or multiple humidifiers)
must not merge except at the steam distributor, and ONLY if the steam cylinders operate in parallel
mode – refer to Figure 22. If necessary, a specifically designed optional Condair adaptor must be used
to connect the steam lines to the steam distributor.
All requirements for steam and condensate lines must be satisfied. Refer to "Steam Lines" on page 42
and "Condensate Lines" on page 44.
1
x.
)
.5 m
15
ma
ft (4
2
6
2
5
3
4
Figure 22: Combining Multiple Steam Lines
1
2
3
4
5
6
Nortec EL
SAM-e steam distributor
Condensate drain line, trap diameter 8 in (200 mm) and located minimum 12 in (300 mm) below condensate port or "Tee" fitting
Air gap funnel connected to building drain
Condair humidifier – must operate in parallel mode
Steam line – constant minimum upslope of 10°, or a constant minimum downslope of 2°
"Tee" fitting, full size
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4.3.4
Electrical Connection
The power supply to the Nortec EL humidifier is routed into the bottom of the control cabinet. Refer to
Figure 23.
The following is a list of installation requirements for power connections:
The power supply cables should be sized to match the full voltage and current draw listed in the
specifications (refer to "Specifications" on page 24).
The external dedicated fused disconnect switch must be installed close to the humidifier so it can be
readily accessible when servicing the unit. The fusing must not exceed the maximum circuit protection listed in the specifications.
All wiring must be in accordance with national and local electrical codes.
1
2
Figure 23: Power Connection (door and front panel removed for clarity)
1
2
46
Planning
Terminal block, high voltage supply
Power cable
2577597_D_EN_1812_Nortec-EL_EM
Nortec EL
4.4
Control System Design
The Nortec EL humidifier is designed to be regulated by an automated control system utilizing either
analog or digital signals. All analog and digital control signal cables are routed to the humidifier through
the top of the unit – refer to Figure 24. Analog control signals (refer to "Analog Control Signals" on page 48)
are connected to the low voltage terminal strip in the humidifier, and digital signals (see "Digital Control
Signals" on page 49) from a computer or the BMS are communicated directly to the integrated control
board in the humidifier using a compatible digital communication protocol.
Regardless of the type of control signals, control components for the conditioned environment will vary
primarily depending upon the steam distribution method – duct or space (refer to "Duct Distribution Control
Design" on page 51 and "Space Distribution Control Design" on page 53). All modulating input signals to the
humidifier must be of the same type – either transducers (RH sensor), or humidistats (demand signals).
IMPORTANT! In addition to the analog or digital control signals, the 24 VAC security loop (consisting of On/Off devices) connected to Pin 1 and Pin 2 on the low voltage terminal strip must be closed
for the Condair humidifier to operate. Condair highly recommends the use of a high limit humidistat
and an air proving switch in the security loop for duct installations – refer to "Duct Distribution Control
Design" on page 51.
1
+
-
JP7
J15
TD RD GND 5V 3.3V
COMM PORT
J19
Driver B
J21
-
CR2032
Driver A
ETHERNET
JP11
BAT
CONTROL BOARD
J17
J18
DISPLAY
DISPLAY
USB
JP8
GND GND 24V
J23
+
JP4
J14
J12
GND
-
SIM Card
Main unit
GND
J16
J10
J6
+
J3 ACC J2 RFB
2
3
J22 LED
4
5
Figure 24: Control Signal Connections
1
2
3
4
5
Nortec EL
Control signal cables, analog and digital
Digital signal from BMS – Modbus or BACnet MS/TP
Digital signal from BMS – BACnet IP
Integrated control board (located behind touchscreen display)
Low voltage terminal strip, for analog signals
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47
4.4.1
Control Signal Input
4.4.1.1
Analog Control Signals
The Nortec EL humidifier can be regulated using up to two modulating analog input signals, and multiple
On/Off input signals for each steam cylinder. Analog controls can be supplied by Condair or by others.
The Nortec EL humidifier can be factory-configured to enable/disable modulating and On/Off control
signals, and set the signal range (refer to Table 17). The unit can also be field-configured using the
touchscreen display.
Table 17: Nortec EL Acceptable Analog Control Signals
Control Type
Control Signal Type
Acceptable Signal
Modulating control and high limit
signals
Demand or transducer
0-5 V, 0-10 V, 1-5 V, 2-10 V, 0-20 V,
0-16 V, 3.2-16 V, 0-20 mA, 4-20 mA
On/Off
Dry contact, 24 VAC or 10 VDC
Security loop
Dry contact, 24 VAC
On/Off control and high limit signals
Nortec EL 150/200 humidifiers with dual steam cylinders have two low voltage terminal strips (designated
"A" and "B") to supply separate sets of control signals to each steam cylinder, so the unit can be operated
in series, parallel or independent mode, as described in "General Description" on page 5.
All control signal wiring must use a minimum of 18 AWG, and the cable length should be kept as
short as possible.
Modulating Control
The Nortec EL humidifier can be operated with one or two modulating analog input signals per steam
cylinder. If two modulating input signals are used, both signals must be of the same type: demand signals
from an external controller, or transducer (RH sensor) signals from an external humidity sensor. In both
cases, the humidifier will not start steam production until the calculated system demand exceeds 26%.
Demand Signals: If the humidifier receives a demand signal, it calculates the desired steam production
level (as a percentage of the total humidifier capacity) proportional to the incoming demand signal (as a
percentage of the signal range). When two demand signal inputs are used, the humidifier responds to
the lowest of the two demand signals.
Transducer Signals: If modulating transducers (RH sensor) are used, the humidifier uses an internal
PI (proportional-integral) controller to calculate system demand for each channel input. The calculated
system demand value for each input channel will vary depending upon the configurable humidity setpoints, as well as proportional and integral functions of the internal controller. If two transducer signals
are used, two system demand values are calculated and the humidifier responds to the lowest of the two
calculated values. Transducers with a possible zero input are not recommended. The Nortec EL humidifier also supports an optional low and high humidity alarm warning with re-configurable humidity triggers.
Security Loop
The security loop connected between Pin 1 and Pin 2 on the low voltage terminal strip consists of 24 VAC
On/Off input devices that are part of the humidification system. The Nortec EL humidifier will not operate
unless this circuit is closed. The security loop also allows On/Off control of the humidifier, and can be
used as feedback to indicate the functional status of the humidification system components critical to
the proper and safe operation of the humidifier.
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Nortec EL
4.4.1.2
Digital Control Signals
The digital communications interface in the Nortec EL humidifier can be used to control the humidifier
output and change system configurations, or monitor its operation. Digital communication can be used
in conjunction with analog devices to regulate the humidifier operation. Condair recommends the use of
transducers for the control and high limit signals when using digital communications.
The Nortec EL humidifier integrates support for standard communication protocols such as BACnet IP,
BACnet MS/TP and Modbus RTU. The supported communication protocol can be selected and configured from the touchscreen display. With optional hardware kits, the Nortec EL humidifier can also be
configured to communicate using LonWorks, or BTL-certified BACnet IP and BACnet MS/TP (Master)
protocols – refer to Table 2 on page 8.
Note: If using BACnet MSTP (slave), verify PICS/BIBBs details with the building network operator to
ensure compatibility. Refer to the BACnet manual (document 2574199) for PICS/BIBBs settings.
BACnet
The Nortec EL humidifier uses the connector (J6) on the integrated control board to connect with the
BMS using the BACnet Master/Slave Token Passing (MS/TP) communications protocol, and the Ethernet
port (J21) to connect with the BMS using the BACnet IP communications protocol. Refer to BACnet,
LonWorks Supplemental Installation and Operation Manual (document 2574199) for control points and
connection details.
The following is a list of installation requirements for BACnet communications:
18-24 AWG shielded, twisted pair cable with 120 Ω impedance is recommended for BACnet MS/TP
communications. Refer to the BMS supplier for recommended maximum length of communication
cables.
Category (CAT) -5, -5E, or -6 cable with RJ-45 terminations is recommended for BACnet IP communications.
Modbus RTU
The Nortec EL humidifier uses a three-pole connector (J6) on the integrated control board to facilitate
Modbus EIA-485, 2-wire communications with the BMS.
Refer to Modbus Installation and Operation Manual (document 2560599) for the list of supported Modbus
parameters and connection/configuration details.
The following is a list of installation requirements for Modbus communications:
18-24 AWG shielded, twisted pair cable with 120 Ω impedance is recommended. CAT-5 cable is
also acceptable, but only uses two conductors and the cable shield – refer to the Modbus manual
for details.
To minimize signal loss, the cable run should not exceed 2200 feet (670 m).
To ensure communication reliability, Condair recommends that no more than 8 nodes are connected
to a single chain/bus.
LonWorks and BTL-Certified BACnet IP, Bacnet MS/TP
LonWorks and BTL-certified BACnet IP and BACnet MS/TP use an optional interface card mounted
on the integrated control board. Refer to BACnet/LonWorks Supplemental Installation and Operation
Manual (Condair document 2574199).
The following is a list of installation requirements for LonWorks and BTL-certified BACnet IP and
BACnet MS/TP communications:
CAT-5 or better cable with RJ-45 terminations is recommended for BTL-certified BACnet IP communications.
Nortec EL
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49
18-24 AWG shielded, twisted pair cable with 120 Ω impedance is recommended for LonWorks and
BTL-certified BACnet MS/TP.
To use the BTL-certified BACnet or LonWorks protocols, jumper J7 on the integrated control board
must be Off. When the jumper J7 is On, the native Modbus protocol is enabled.
4.4.2
Condair Linkup
The Linkup function allows linking of up to six integrated control boards (for a maximum of 12 steam
cylinders) in a "Main-Extension" configuration through the connector J10 on the integrated control board.
One set of control signals (analog or digital) is connected to the unit designated as the "Main" unit.
The humidifiers can then be configured to operate in parallel or in series mode to satisfy humidity
demand, as described in "General Description" on page 5. Humidifiers operated in series mode permit a
lower turn-down ratio (when the smallest capacity unit in the Linkup chain is designated as the "Main"
unit, the overall steam output can be varied down to 25% of that unit's capacity). In parallel mode, all
steam output from the units in the chain connect to a common steam distribution system, which offers
even wear on the units.
CONTROL BOARD
JP8
RFB
J12 J14
GND GND 24V
ACC
GND
JP11
CONTROL BOARD
RFB
ACC
+
-
+
-
+
-
ACC
-
CONTROL BOARD
+
LV
JP4
-
BAT
CR2032
J10
GND
+
JP7
SIM Card
Main Unit
J6
-
JP11
J2
J3
+
GND GND 24V
BAT
JP7
CR2032
LV
J2
J3
SIM Card
Main Unit
J6
-
J12 J14
+
JP8
JP4
SIM Card
Main Unit
GND
J10
GND
JP4
GND
JP8
J12 J14
GND GND 24V
JP11
BAT
JP7
CR2032
LV
9
8
9
8
9
8
7
6
7
6
7
6
5
4
3
2
1
5
4
3
2
1
5
4
3
2
1
All inputs
-
J10
GND
+
J6
-
J2
J3
3
2
+
RFB
1
4
4
Figure 25: Linkup Wiring
1
2
50
Planning
Main unit (all control signals to unit)
Extension unit#1 (no control signals to unit)
3
4
Extension unit#X (no control signals to unit)
Jumper (on all Extension units)
2577597_D_EN_1812_Nortec-EL_EM
Nortec EL
The following is a list of installation requirements for connecting humidifiers in a Linkup chain:
Up to 12 steam cylinders (equivalent of 1200 lb/h or 550 kg/h) can be connected together in the
Linkup chain.
18-24 AWG multi-strand, twisted pair, shielded cable must be used to connect the units.
All control signal inputs (humidistats/transducers and security loop) must be connected to the "Main"
unit only.
A jumper must be installed between the security loop pins "1" and "2" in the low voltage terminal
strip on all "Extension" units.
All control signal inputs must be connected to the low voltage terminal strip designated "A" in
Nortec EL 150/200 humidifiers with dual steam cylinders.
4.4.3
Humidity Control Design
4.4.3.1
Duct Distribution Control Design
When using the supply air duct for steam distribution, Condair highly recommends the use of an air
proving switch and a high limit humidistat in addition to a humidity controller. Environments with exterior
walls should also consider using an outdoor temperature sensor in the system. Refer to Figure 26.
10 ft (3 m) min.
4
3
2
1
Figure 26: Duct Humidity Control Location
1
2
3
4
Humidity controller (return air duct or inside the room)
High limit switch
Air proving switch
Outdoor temperature sensor (situated outdoors)
Air Proving Switch
Airflow is required for steam vented into the air supply duct to be absorbed before it can be distributed.
The normally-open dry contact Condair air proving switch connected to the humidifier's security loop
prevents humidification when the air handler is not operational.
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High Limit Switch
A high limit switch connected to the humidifier's security loop is used to limit the humidity in the supply
air from reaching saturation conditions, which can lead to water damage. Typically an On/Off duct humidistat will suffice for this application, but there are several applications where modulating transducers
or humidistats should be used, including the following:
•
When using a variable air volume (VAV) air handling system.
•
When a high limit switch must be installed after a bend or obstruction in the supply duct.
•
Applications that require very high air exchange rate, or 100% outdoor air.
•
Installations with short steam absorption distances.
The following installation requirement must be observed when using a high limit switch in a duct distribution system:
The distance between the steam distributor and the Condair duct humidistat or transducer should be
minimum 10 ft (3 m), or greater than the calculated absorption distance. Refer to Figure 26 on page 51.
Humidity Controller
The humidity controller detects the relative humidity in the conditioned environment and provide feedback to the humidifier. The Nortec EL humidifier is compatible with On/Off humidistats, and transducers
(RH sensor), but there are several applications where modulating transducers or humidistats should be
used, including the following:
•
When using an economizer, or variable air volume (VAV) air handling system.
•
Applications that require very high air exchange rate, or 100% outdoor air.
•
Applications that require narrow humidity tolerances.
The following installation requirements must be observed when using humidity controllers in a duct
distribution system:
Must be installed in a location representative of the conditioned environment. Controls installed in
exhaust or return ducts are preferred.
Wall-mounted controls can also be installed in the conditioned environment. However, they should
be located in an area that is not exposed to infiltrating air, and where there are no discharge diffusers
or localized variations in temperatures.
Outdoor Temperature Setback
An outdoor temperature sensor should be used to prevent condensation on windows or other surfaces
that are exposed to outdoor air. Condair outdoor temperature sensors are used in conjunction with
Condair humidistats that limit setpoints based upon outdoor temperature – refer to Table 3 on page 9
for part numbers.
The default setback for the outdoor temperature sensor is shown in Figure 27 on page 53, which can be
reconfigured depending on the insulation quality of windows.
The following installation requirement must be observed when outdoor temperature sensor in a duct
distribution system:
The outdoor sensor must be installed in an area that is representative of the outdoor air temperatures – such as a fresh air intake duct, or located directly outside.
52
Planning
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Nortec EL
Setpoint Limit (% RH)
45
40
35
30
25
20
15
10
o
F
-40
-35
-30
-25
-20
-15
-10
-5
0
5
o
C
-40
-31
-22
-13
-4
5
14
23
32
41
Outdoor Temperature
Figure 27: Default Temperature Setback
4.4.3.2
Space Distribution Control Design
When distributing steam directly into the conditioned environment the humidification system will require
a wall-mounted On/Off humidistat or transducer (RH sensor). Condair also recommends a high limit
switch. Environments with exterior walls should consider using an outdoor temperature sensor to prevent
condensation on windows/walls.
The following installation requirement must be observed when using humidity controllers in a space
distribution system:
Wall-mounted controls should be located in an area that is not exposed to infiltrating air, and where
there are no discharge diffusers or localized variations in temperatures.
1
2
Figure 28: Space Humidity Control Location
1
2
Nortec EL
High limit switch (recommended)
Humidity controller (inside the space)
2577597_D_EN_1812_Nortec-EL_EM
Planning
53
4.4.4
Remote Fault Indication Board
The optional remote fault indication board includes four relays that can be used to provide remote status
indication. Refer to Figure 29.
Each relay is described below:
The normally open relay is closed when the humidifier has power and the On/Off
switch is set to the On position.
Steam
The normally open relay is closed when the board detects that the cylinder is drawing
current and steam is being produced.
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.
Error
The relay can be wired to open (NC) or close (NO) when a fault is detected by the
humidifier controls.
J2 on Control Board
F1
1
2
1
2
3
4
100mA
Analog Out
Unit On
Service
Steam Unit ON
1 2 3 4 5 6 7 8 9 10
Sensor Supply
Max. 60mA
Error
INTERNAL
EXTERNAL
Figure 29: Optional Remote Fault Indication Board
54
Planning
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4.4.5
Accessory Board
The optional accessory board includes four relays that can be used to control other accessory devices.
Refer to Figure 30.
Each relay is described below:
The normally open relay can be wired to activate or deactivate the optional valve for
flushing the water supply line for steam cylinder A.
Flush B
The normally open relay can be wired to activate or deactivate the optional valve for
flushing the water supply line for steam cylinder B.
Fan B
The normally open relay can be wired to activate or deactivate an external fan of the
air handling unit connected to steam cylinder B.
Fan A
The normally open relay can be wired to activate or deactivate an external fan of the
air handling unit connected to steam cylinder A.
J3 on Control Board
F1
1
2
1
2
3
4
100mA
Analog Out
Flush A
Flush B
Fan B
Fan A
1 2 3 4 5 6 7 8 9 10
Sensor Supply
Max. 60mA
Flush A
INTERNAL
EXTERNAL
Figure 30: Optional Accessory Board
Nortec EL
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Planning
55
4.5
Preventative Maintenance
Regular maintenance of the Nortec EL humidifier is a requirement for maintaining the safety and operational efficiency of the humidifier. Maintenance of the humidifier is broken down into two categories
– regular replacement of the steam cylinder(s), and regular maintenance of the humidifier.
The control software in the Nortec EL humidifier monitors the performance of the steam cylinder(s)
and displays a service notification when the steam cylinder(s) is spent, and can no longer achieve full
output. The cylinder(s) must be replaced within 72 hours of the service notification, after which a fault
message appears and the humidifier stops production.
Refer to the Operation and Maintenance Manual (document 2582954) for the regular maintenance
requirements for the Nortec EL humidifier.
56
Planning
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5
Total Humidification Load Calculation
5.1
Total Humification Load
The total humidification load is the sum of the three primary considerations: base humidification load,
moisture content equilibrium, and condensate losses. Each of these is described below.
Base Humidification Load
The base humidification load is defined as the humidification load required to increase the humidity of
the unconditioned supply air, from the worst case scenario, to meet the design requirements for the
conditioned environment. This is typically the largest contributing factor to the total humidification load,
and is described in "Calculating Base Humidification Load" on page 58.
Moisture Content Equilibrium
When materials stored in a conditioned environments retain moisture content that is out of equilibrium
with the moisture content of that environment, it may have an equalizing effect on the environment (depending upon the hygroscopic properties of the material), thereby increasing or decreasing the relative
humidity. This must be be taken into consideration when calculating the total humidification load. Refer
to "Moisture Content Equilibrium" on page 60 for details.
Condensate Losses
Some steam in the steam distribution system will condense back to a liquid state due to convection heat
transfer, which reduces the gross output of the humidifier. These losses, as discussed in"Condensate Loss"
on page 61, must be taken into consideration when calculating the total humidification load.
Once the above considerations have been taken into account, it may be prudent to increase the capacity
of the humidifier, to allow for a safety margin, especially if the design conditions will require the unit to
regularly operate at or near or its maximum capacity.
Visit www.condairhelp.com and use the free online program - Humidifier Engineering and Loadsizing Program (H.E.L.P.) to assist you with absorption distance calculations, selection of
humidifiers, steam distributors, controls and accessories.
Tutorials on using this program are available from the Literature & Media section of the website – www.condair.com.
Additional information on the effects of humidity, relative humidity calculations, load calculations, and recommended design conditions can be found in the Humidification Load
Calculation Manual (document 2553856) from www.condair.com.
Nortec EL
2577597_D_EN_1812_Nortec-EL_EM
Total Humidification Load Calculation
57
5.1.1
Calculating Base Humidification Load
5.1.1.1
Total Unconditioned Air Supply Volume
The total volume of incoming unconditioned air (ft3/h), forced and naturally ventilated, depends on the
construction of the conditioned environment and the type of air circulation system used.
Forced Ventilation
Typically, an air handler system will exchange a fixed percentage of conditioned air for unconditioned
air. This unconditioned air is the volume of air that requires humidification.
Air handler systems vary by design, but will rely upon adding or removing volumes of air from a controlled
environment. Air handling systems that add air to the conditioned environment will have a total forced air
volume equivalent to the unconditioned supply air volume. Air handling systems that exhaust air from the
conditioned environment must have at least an equal volume of unconditioned air reintroduced, which
is equal to the total forced air volume.
Accounting for Economizer Cycles
Under normal heating conditions, the unconditioned supply air volume is usually relatively small to avoid
large heating and conditioning treatments. However when the economizer cycle is in operation, the unconditioned air volume may be as high as 100% of the total ventilation. To calculate the humidification
load for a system with an economizer cycle, the air ventilation and thermal load must be calculated for
each month in which the economizer mode may operate to determine the highest humidification load.
Natural Ventilation
A natural ventilation system is one that does not rely upon direct mechanical means to provide air
ventilation to the conditioned environment. Air enters the conditioned environment through openings in
the building envelope. The amount of makeup air is calculated based on the volume of the conditioned
space and an estimate of air changes per hour.
5.1.1.2
Unconditioned Supply Air Moisture
Once the total volume of unconditioned supply air is known, the moisture content of the air supply must
be determined. To ensure the humidifier capacity will be able to satisfy design conditions, the calculations must be based on the lowest unconditioned supply air temperatures and humidity that can be
expected on a yearly basis. In applications where the unconditioned supply air will be drawn from the
local atmosphere, Condair advises utilizing the weather data compiled by geographic location published
by the ASHRAE Climate Data Centre.
Once the lowest temperature for the given geographic location is known, the moisture content of the
unconditioned air supply can be determined as follows:
Supply Air Moisture (lb/ft3) = Maximum Supply Air Moisture (lb/ft3) × Lowest Humidity (% RH)
where,
58
•
Maximum Supply Air Moisture is the moisture content (lb/ft3) at 100% RH, obtained from Table 18 on
page 59 (imperial units) or Table 19 on page 60 (metric units) corresponding to the lowest anticipated
supply air temperature for the unconditioned air supply;
•
Lowest Humidity is the lowest anticipated humidity (% RH) for the unconditioned supply air source.
Total Humidification Load Calculation
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Nortec EL
5.1.1.3
Conditioned Air Moisture
The moisture content for the designed air conditions must be determined next. To ensure the humidifier
capacity will be able to satisfy design conditions, the calculations must be based on the highest desired
design air temperatures and humidity.
Once the highest design temperature and highest design humidity for the application are known, the
moisture content of the conditioned air supply can be determines as follows:
Conditioned Air Moisture (lb/ft3) = Maximum Supply Air Moisture (lb/ft3) × Design Humidity (% RH)
where,
•
Max Supply Air Moisture is the moisture content at 100% RH, obtained from Table 18 on page 59
(imperial units) or Table 19 on page 60 (metric units) corresponding to the highest design air temperature for the conditioned environment;
•
Design Humidity is the highest required humidity (% RH) for the conditioned environment.
5.1.1.4
Base Humidification Load
The base humidification load is the moisture required to bring the unconditioned supply air to meet the
conditioned air requirements, and is calculated as follows:
Base Load (lb/h) = Total Supply Air Volume (ft3/h) × {Conditioned Air Moisture (lb/ft3) - Supply Air
Moisture (lb/ft3)}
where,
•
Total Supply Air Volume is the total volume of incoming unconditioned air (ft3/h), as described in
"Total Unconditioned Air Supply Volume" on page 58.
•
Conditioned Air Moisture is the moisture content (lb/ft3) of the conditioned air supply, as calculated
in "Conditioned Air Moisture" on page 59;
•
Supply Air Moisture is the moisture content of the unconditioned air supply, as calcualted in
"Unconditioned Supply Air Moisture" on page 58.
Table 18: Moisture Content of Air at 100% RH (Imperial Units)
Nortec EL
°F
lb/ft3
°F
lb/ft3
°F
lb/ft3
°F
lb/ft3
°F
lb/ft3
-20
0.0000343
41
0.000424
61
0.000857
81
0.00163
101
0.00293
-10
0.0000414
42
0.000440
62
0.000886
82
0.00168
102
0.00302
-5
0.0000500
43
0.000457
63
0.000916
83
0.00173
103
0.00310
0
0.0000686
44
0.000474
64
0.000946
84
0.00178
104
0.00319
5
0.0000871
45
0.000491
65
0.000979
85
0.00184
105
0.00328
10
0.000111
46
0.000509
66
0.00101
86
0.00190
106
0.00337
15
0.000141
47
0.000527
67
0.00104
87
0.00195
107
0.00347
20
0.000177
48
0.000547
68
0.00108
88
0.00201
108
0.00356
25
0.000223
49
0.000567
69
0.00111
89
0.00207
109
0.00366
30
0.000279
50
0.000587
70
0.00116
90
0.00213
110
0.00376
31
0.000291
51
0.000609
71
0.00119
91
0.00220
111
0.00387
32
0.000304
52
0.000630
72
0.00123
92
0.00226
112
0.00397
33
0.000316
53
0.000651
73
0.00127
93
0.00233
113
0.00408
34
0.000327
54
0.000674
74
0.00131
94
0.00240
114
0.00419
35
0.000340
55
0.000699
75
0.00135
95
0.00247
115
0.00430
2577597_D_EN_1812_Nortec-EL_EM
Total Humidification Load Calculation
59
°F
lb/ft3
°F
lb/ft3
°F
lb/ft3
°F
lb/ft3
°F
lb/ft3
36
0.000353
56
0.000723
76
0.00139
96
0.00254
120
0.00491
37
0.000366
57
0.000747
77
0.00144
97
0.00262
125
0.00559
38
0.000380
58
0.000773
78
0.00149
98
0.00269
130
0.00634
39
0.000394
59
0.000800
79
0.00154
99
0.00277
135
0.00719
40
0.000409
60
0.000829
80
0.00158
100
0.00285
140
0.00812
Table 19: Moisture Content of Air at 100% RH (Metric Units)
5.1.2
°C
kg/m3
°C
kg/m3
°C
kg/m3
°C
kg/m3
°C
kg/m3
-30
0.000578
-10
0.00218
10
0.00943
30
0.0303
50
0.0828
-29
0.000553
-9
0.00238
11
0.0100
31
0.0320
51
0.0867
-28
0.000540
-8
0.00259
12
0.0107
32
0.0337
52
0.0908
-27
0.000540
-7
0.00281
13
0.0114
33
0.0356
53
0.0951
-26
0.000551
-6
0.00305
14
0.0121
34
0.0375
54
0.0995
-25
0.000573
-5
0.00330
15
0.0129
35
0.0395
55
0.104
-24
0.000606
-4
0.00357
16
0.0137
36
0.0416
56
0.109
-23
0.000650
-3
0.00385
17
0.0145
37
0.0438
57
0.114
-22
0.000704
-2
0.00415
18
0.0154
38
0.0461
58
0.119
-21
0.000769
-1
0.00447
19
0.0163
39
0.0485
59
0.124
-20
0.000845
0
0.00481
20
0.0173
40
0.0510
60
0.130
-19
0.000931
1
0.00516
21
0.0183
41
0.0536
61
0.136
-18
0.00103
2
0.00554
22
0.0194
42
0.0563
62
0.142
-17
0.00113
3
0.00594
23
0.0206
43
0.0592
63
0.148
-16
0.00125
4
0.00636
24
0.0218
44
0.0621
64
0.154
-15
0.00138
5
0.00680
25
0.0230
45
0.0652
65
0.161
-14
0.00152
6
0.00727
26
0.0243
46
0.0685
66
0.168
-13
0.00167
7
0.00777
27
0.0257
47
0.0718
67
0.175
-12
0.00183
8
0.00829
28
0.0272
48
0.0753
68
0.182
-11
0.00200
9
0.00884
29
0.0287
49
0.0790
69
0.190
Moisture Content Equilibrium
Materials stored in conditioned environments may retain moisture content that is out of equilibrium with
the moisture content of that environment. Depending upon the hygroscopic properties of the material,
it may have an equalizing effect on the environment, thereby increasing (desorption) or decreasing
(absorption) the relative humidity (RH) of the surrounding environment. Any materials stored in the
conditioned environment that may release or absorb significant moisture from the atmosphere should
have their hygroscopic properties assessed by the manufacturer. Once the severity of this influence is
known, it should be incorporated into the total humidification load.
Hygroscopic regain is defined as the amount of water a completely dry material will absorb
from the air through desorption or absorption. Any hygroscopic product that is purchased
and sold by weight must be located in a carefully controlled environment.
60
Total Humidification Load Calculation
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5.1.3
Condensate Loss
Some steam in the steam distribution system will condense back to a liquid state due to convection
heat transfer, which reduces the gross output of the humidifier. An estimate of the condensate losses
throughout the distribution system should be determined to ensure the total humidifier capacity, less any
condensate loss, will still satisfy the total load requirement. The factors that contribute to condensate
losses are discussed below.
Steam Distributor Losses
The steam distributor is often the largest contributor to condensate losses in a steam distribution system.
The amount of steam lost due to condensation is dependent upon the design of the distributor system.
Refer to the steam distributor engineering guide for specific information on condensate loss.
Using stainless steel air-gap insulation is one way to reduce distributor loses and conserve
energy. Additional information on calculating condensate losses, and savings from the use
of insulating distributors can be found in the Condair white paper “Nortec Stainless Steel Air
Gap Insulation R Value”.
To compensate for condensate losses when using a SAM-e distribution manifold, the calculated humidification must be increased accordingly. Refer to Table 20 and Table 21 for SAM-e condensate losses.
Table 20: Condensate Losses for Un-insulated SAM-e Distribution Manifold
Air Velocity
fpm (m/s)
Atmospheric Steam Condensate Losses*
(% of Maximum Capacity)
55 °F (13 °C)
70 °F (21 °C)
500 (2.5)
15%
12%
1000 (5.1)
20%
15%
* These values may change due to other unknown variables, and as such should only be used as a guideline.
Table 21: Condensate Losses for Insulated SAM-e Distribution Manifold
Air Velocity
fpm (m/s)
Atmospheric Steam Condensate Losses*
(% of Maximum Capacity)
55 °F (13 °C)
70 °F (21 °C)
500 (2.5)
5%
4%
1000 (5.1)
10%
8%
* These values may change due to other unknown variables, and as such should only be used as a guideline.
For more information on specifying SAM-e insulation, refer to SAM-e Engineering Manual (Condair
document 1503529).
Nortec EL
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Total Humidification Load Calculation
61
Supply Line Losses
Condensate losses per linear foot can be roughly estimated in a system with properly designed atmospheric steam lines. The total length of the atmospheric steam line must be taken into account, which
is the sum of the linear length of the steam pipe and equivalent length of every fitting in the line. For
equivalent lengths of common fittings see Table 16 on page 43. For design information on steam lines
refer to "Atmospheric Steam and Condensate Lines" on page 42.
Once total equivalent linear length is determined, Table 22 can be used to estimate the humidifier capacity
lost to supply line losses.
Table 22: Approximate Condensate Per Foot of Atmospheric Steam Line*
Steam Capacity
lb/h (kg/h)**
Nominal Steam Line
Size – Copper Tube
(MED Type-L)
in (mm)
Nominal Steam Line
Size – Stainless Steel
Tube (wall thickness
0.065 in)
in (mm)
Steam Loss in
Condensation
lb/h/ft (kg/h/m)
4-30 (1.8-14)
0.75 (19)
0.875 (22)
0.06 (0.09)
30-100 (14-45)
1.5 (38)
1.75 (45)
0.11 (0.18)
200-300 (91-136)
3 (76)
3 (76)
0.16 (0.23)
400-660 (181-299)
4 (102)
4 (102)
0.22 (0.33)
* Based on 1 in (25 mm) pipe insulation at 3 in H2O (745 Pa) duct static pressure.
** Inclusive
62
Total Humidification Load Calculation
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Nortec EL
6
Product Selection
The following checklist can be used to select the Nortec EL humidifier and its options and accessories.
However, Condair strongly advises you to visit www.condairhelp.com and use the free online program –
Humidifier Engineering and Load-sizing Program (H.E.L.P.) to assist you in sizing the humidifier and
selecting options and accessories. All part numbers are also available from www.condairhelp.com.
6.1
Humidifier and Options
Humidifier
Refer to "Total Humification Load" on page 57 for the required total capacity of the humidifier, then select an
available model (or combination of available humidifier models) from Table 8 on page 24. Enter the selection
below, making sure that the total capacity of the model(s) selected exceeds the total humidification load.
Humidifier Model and Capacity
Quantity
EL005 – 5 lb/h (2.2 kg/h)
EL010 – 10 lb/h (4.5 kg/h)
EL020 – 20 lb/h (9 kg/h)
EL030 – 30 lb/h (14 kg/h)
EL050 – 50 lb/h (23 kg/h)
EL075 – 75 lb/h (34 kg/h)
EL100 – 100 lb/h (45 kg/h)
EL150 – 150 lb/h (68 kg/h)
EL200 – 200 lb/h (91 kg/h)
If more than one humidifier is to be supplied to satisfy the total humidification load, select this checkbox if all units are
to supplied with the same humidifier options.
Power
Refer to Table 8 on page 24 for the available power configurations, then select the specific power configuration for your site.
Humidifier Power Requirements
Voltage:
Phase:
Options
Select optional internal primary fusing, if required. The internal primary fusing for the unit is NOT a substitute for a dedicated external disconnect switch. Refer to Table 2 on page 8 for details of the option,
and Table 5 on page 12 for the part number.
Optional Internal Primary Fusing
Part Number
Yes – internal primary fusing required
No – internal primary fusing not required
Nortec EL
2577597_D_EN_1812_Nortec-EL_EM
Product Selection
63
Select optional extreme drain water cooling, if required. Refer to Table 3 on page 9 for details of the option.
Optional Extreme Drain Water Cooling
Part Number
Yes – extreme drain water cooling required
DWC
No – extreme drain water cooling not required
Select other options and accessories, as required. For details of the options and accessories refer to
Table 2 on page 8 and Table 3 on page 9 respectively. Refer to Table 5 on page 12 for option part numbers.
Humidifier Options and Accessories
Part Number
Remote fault indication board (refer to "Remote Fault Indication Board" on page 54 for
additional details)
RFI
Accessory board (refer to "Accessory Board" on page 55 for additional details)
ACC
Advanced foam detection
Mounting bar
Mounting rack
In-line water filter (refer to Table 3 on page 9 for part number)
Controls
The humidifier can be factory-configured to accept specific analog control signals, and thus eliminate
the need to configure it in the field. Refer to "Analog Control Signals" on page 48 for additional details.
Select the required configuration for control signal and channels. Refer to Table 6 on page 13 for part
numbers.
Control Signal Acceptance
Single
Channel
Dual
Channel
Part Number
0-5 VDC
0-20 mA
4-20 mA
0-10 VDC
0-16 VDC
1-5 VDC
2-10 VDC
0-20 VDC
Select control accessories, as required, for automated regulation of the humidifier. Refer to "Control System
Design" on page 47 for details of the control system, and Table 3 on page 9 for details of accessories
and part numbers.
Control Accessories
Part Number
Air proving switch
Duct-mounted outdoor temperature setback sensor
64
Product Selection
2577597_D_EN_1812_Nortec-EL_EM
Nortec EL
Control Accessories
Part Number
Exterior-mounted outdoor temperature setback sensor
Plug-in transformer, 120 VAC to 24 VAC
Control humidistat (refer to Table 7 on page 13 for part numbers)
High limit humidistat (refer to Table 7 on page 13 for part numbers)
Select a digital communications protocol, if required, for interfacing the Nortec EL humidifier with building automation systems. Refer to "Digital Control Signals" on page 49 or BACnet/LonWorks Supplemental
manual (document 2574199) for details.
Digital Communications Protocol
Part Number
BACnet IP, BACnet MS/TP
Standard
Modbus
Standard
BTL-certified BACnet MS/TP – Master
BAC-BTL-MSTP
BTL-certified BACnet IP – Master
BAC-BTL-IP
LonWorks
6.2
LON
Steam Distribution Equipment
Select a steam distributor that exceeds the production capacity of the humidifier(s), fits the duct/air handler size (if applicable), and accomodates the steam outlet connection to the humidifier. Refer to "Steam
Distribution" on page 40 for available methods.
If a SAM-e is required, refer to the SAM-e Engineering Manual (document 1503529) for selection information and part numbers, then make the appropriate selections below.
SAM-e Configuration
Quantity
Steam inlet adaptor
–
SAM-e header
–
Part Number
Steam tubes
Insulation (improves energy efficiency by as much as 70%)
–
Mounting Frame (required for vertical duct installation)
–
If a Steam Distributor is required, refer to the Steam Distributor Engineering Manual (document 1506117)
for selection information and part number, then make the appropriate selection below.
Steam Distributor Configuration
Quantity
Part Number
Steam distributor
Nortec EL
2577597_D_EN_1812_Nortec-EL_EM
Product Selection
65
If a blower pack is required, refer to the Blower Pack Installation Operation and Maintenance Manual
(document 2582277) for additional details, then make the appropriate selection below.
Blower Pack Configuration
Blower pack (built-on)
Quantity
Part Number
–
BOBP
Blower pack (remote-mounted) – 110-120 VAC, 1 Phase, wall outlet
powered, for 1-3/4 in (45 mm) steam outlet
2579400
Blower pack (remote-mounted) – 110-120 VAC, 1 Phase, wall outlet
powered, for 7/8 in (22 mm) steam outlet
2579401
Power kit (small) for remote-mounted blower pack – refer to Table 5 on
page 12 for selection details.
BPP-SM
Power kit (large) for remote-mounted blower pack – refer to Table 5 on
page 12 for selection details.
BPP-L
If steam and condensate hoses and accessories are required, make the appropriate selection below.
Refer to "Atmospheric Steam and Condensate Lines" on page 42 for additional details on steam hoses.
Steam and Condensate Hose and Accessories
Length
(inches)
Part Number
Steam hose, 1-3/4 in (45 mm) I.D.
1328820
Steam hose, 7/8 in (22 mm) I.D.
1328810
Condensate hose, 3/8 in (9.5 mm) I.D.
1328834
Self-Actuated Condensate Cooler, 140 °F (60 °C)
–
1710010
24 V Electric Condensate Cooler, 140 °F (60 °C)
–
1710020
If steam line reducers and tees are required, make the appropriate selection below. Refer to "Atmospheric
Steam and Condensate Lines" on page 42 for additional details on steam and condensate lines.
Steam Line Reducer and Tee
Quantity
Part Number
Steam line reducer, 1-3/4 to 7/8 in (45 to 22 mm) – copper
1507846
Steam line reducer, 1-3/4 to 7/8 in (45 to 22 mm) – stainless steel
1508165
Tee adaptor, 1-3/4 × 1-3/4 × 3/8 in (45 × 45 × 9.5 mm) – for condensate drainage
1329635
Tee adaptor, 7/8 × 7/8 × 3/8 in (22 × 22 × 9.5 mm) – for condensate
drainage
1329634
Clear
Form
Print
Form
Save
Form
To print the completed form (if using an electronic version of the manual), select the Print Form button
above. In the Print dialog box that appears, select pages 59-62 under Pages to Print, and the Fit option
under Page Sizing & Handling. Click Print.
To save the completed electronic form, first select the Save Form button above, and select "Adobe PDF"
from the Printer drop-down list in the dialog box. Then select pages 59-62, and click Print. Finally, enter
a file name in the next dialog box, and click Save.
To asssist you with purchasing and installing a Nortec EL humidifier, a "Sample Specification" and "Blank
Schedule" are included in Appendix A for your convenience.
66
Product Selection
2577597_D_EN_1812_Nortec-EL_EM
Nortec EL
A
Appendix
A.1
Sample Specification
PART 1 - GENERAL
1.1
Work Included:
a) Nortec EL Series electrode steam humidifier[s] as indicated on drawing[s] and as indicated
on schedule[s].
b) Complete and operable humidification system [which meets applicable building codes]
c) Equipment start-up and project inspection by qualified factory trained representative.
1.2
Quality Assurance:
a) Certifications, C-UL US Listed.
b) ISO 9001-2008.
c) ANSI/NFPA 70 - National Electrical Code.
d) ARI 640, "Standard for Commercial and Industrial Humidifiers.
e) ASHRAE SSPC 135 BACnet
1.3
Related Sections:
a) 23 Mechanical General
1.4
b) 23[
] Piping Installation
c) 23[
] Control System
Submittals:
a) Submit product data under provisions of Section 23. Include product description, model,
dimensions, component sizes, rough-in requirements, service sizes, and finishes. Include
rated capacities, operating weights, furnished specialties, and accessories.
b) Submit manufacturer's installation instructions.
c) Submit operation and maintenance data.
d) Submit coordination drawings. Detail fabrication and installation of humidifiers. Include piping details, plans, elevations, sections, details of components, and dispersion tubes. Detail
humidifiers and adjacent equipment. Show support locations, type of support, weight on each
support, and required clearances.
e) Submit wiring diagrams including power, signal, and control wiring. Differentiate between
manufacturer-installed and field-installed wiring.
f)
1.5
Submit minimum water quality requirements and water pressure requirements.
Schedules:
a) Refer to information contained in schedule[s] attached to this specification.
b) Humidifiers to be of type, capacity, and arrangement as listed in schedule[s].
c) Include accessories listed in schedule[s] and those accessories required for type of unit.
Nortec EL
2577597_D_EN_1812_Nortec-EL_EM
Appendix-A
67
ELECTRODE STEAM HUMIDIFICATION SYSTEM - Model Nortec EL
PART 2 - PRODUCTS
2.1
Provide Nortec EL electrode humidifier generating mineral-free, sterile steam from a potable
water supply Packaged unit, wall mounted, atmospheric steam generation using an electrode
steam cylinder[s]. Resistive element technology and boiler steam (pressure steam) technology
not acceptable.
2.2
Unit[s] to be complete with:
a) Touchscreen controller with standard building automation:
i.
Intuitive touchscreen control with color graphic user interface.
ii. Standard building automation communication protocols BACnet IP, BACnet MSTP and
Modbus. Additional hardware required for building automation communication not acceptable.
iii. Embedded web interface for easy configuration and remote monitoring from any computer
with a web browser over a local area network (LAN) connection.
iv. USB interface for new software/feature upload and download of operational information.
v. Single or dual channel analog signal acceptance, supporting both demand and transducer
control. Ability to control setpoint from humidifier control when using transducer controls.
b) Packaged system with Condair electrode cylinder technology:
i.
Condair cylinder optimized for humidifier capacity and supply voltage. Cylinder must have
welded seam to ensure watertight and have high water sensor to prevent overfilling.
ii. Durable powder coated steel cabinet with zero side clearance requirement for minimal
footprint.
iii. Insulating air gap between plumbing and electrical compartment for increased electronic
reliability.
iv. Standard internal drain water tempering to ensure maximum 140° F [60° C] drain water.
External drain water cooler not acceptable.
v. Integral fill cup with minimum 1-inch [25 mm] air gap to prevent back siphoning.
vi. Full cylinder indication and pre-notification of automatic shutdown at end of cylinder life.
vii. Automatic pulse feature to clean any obstruction from the drain solenoid valve if required.
viii. Automatic off-season shut-down [after 3 days of "no call"] will completely drain the
cylinder[s] and automatically restart on call for humidity. Adjustable on/off and time sequence. Provides extended cylinder life, while ensuring stagnant water does not remain
in the system.
c) Condair Auto-Adaptive Control water management:
i.
Advanced water management utilizing the patented Proportional plus Integral AutoAdaptive Control system for optimal energy efficiency, water usage and cylinder life.
ii. 98% thermal efficiency from startup until end of cylinder life.
iii. Drains automatically optimized to water conditions to maximize cylinder and reduce water
usage.
iv. Modulating output between 25% and 100% of rated capacity.
2.3
Optional Accessories
a) Refer to ‘Option schedule’
68
Appendix-A
2577597_D_EN_1812_Nortec-EL_EM
Nortec EL
PART 3 - EXCECUTION
3.1
Installation:
a) Install humidifiers per manufacturers' instructions.
b) Install with required clearance for service and maintenance.
3.2
Accessories:
a) Install accessories in accordance with manufacturer's recommendations.
3.3
Commissioning:
a) Start-up of humidifier to be by factory trained technician.
A.2
Blank Schedule
A blank schedule is included on the following page for your convenience.
Nortec EL
2577597_D_EN_1812_Nortec-EL_EM
Appendix-A
69
Tag
Area served
Type
Mftr.
Humidifier
Model
Duct
Dimen.
(W×H)
Airflow
(cfm)
Temp. Humidity Humidity
Capacity Input Voltage
Freq.
Entering Entering Leaving
Phase
(lb/h)
(kW)
(V)
(Hz)
(°F)
(% RH) (% RH)
Weight
(lb)
Notes
Notes
Warranty
Condair Inc. and/or Condair 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, 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 parts or materials that are considered consumables, including but not limited to: cylinders,
filters, nozzles, membranes, media, gaskets, O-rings, etc. are NOT covered by the warranty.
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 quality of the water used.
THE COMPANY retains the right to change the design, specification and performance criteria of its products
without notice or obligation.
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.
Extended Warranty
Extended warranties are available to purchase under the conditions listed above.
SALES AND SERVICE:
U.S.A.
835 Commerce Park Avenue
Ogdensburg, NY 1366-2209
CANADA
2740 Fenton Road
Ottawa, ON, K1T 3T7
Tel: 1.866.667.8321
Fax: 613.822.7964
Email: [email protected]
Website: www.condair.com
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