Condair 2553855-C SE Series User manual

Condair 2553855-C SE Series User manual
Your guide to selecting and specifying Nortec Steam Exchange Humidifiers!
Nortec
SE
Series
Engineering
Manual
Includes technical specifications,
guidelines, and options for selection
and application of SETC B+ / SEP
Steam Exchange humidifiers
2553855-C | 26/11/2018
Thank you for choosing Condair.
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 installation or maintenance of
recipient’s equipment. All references to the Condair name should be taken as referring to Condair LTD.
Liability Notice
Condair does not accept any liability for installations of humidity equipment installed by unqualified personnel
or the use of parts/components/equipment that are not authorized or approved by Condair.
Copyright Notice
Copyright 2018, Condair LTD. All rights reserved.
Contents
1 Introduction
1
How the Humidifier Works
3
Nortec Nortec SE Humidifier
Models
5
6
7
9
Nortec Nortec SETC and the
Nortec SEP
Nortec Nortec SE Humidifier
Features
Nortec Nortec SE Humidifier
Components
Nortec Nortec SE Outdoor
Components
13 Specifying the
Nortec SE
14
Humidifier Specification Checklist
15
Humidifier Load
17
Supply Steam Pressure
18
Humidifier Controls
19
Steam Distribution Method
19
Nortec SE Series Options and
Accessories
24
Sample Specification
29 Nortec SE Installation
Requirements
30
Location
35
Plumbing
38
Boiler Steam and Boiler
Condensate Return
40
Electrical
41
Steam Distribution
42
Steam Lines and Condensate
Returns
46
Nortec Nortec SETC/P Controls
47
CondairControls
52
Staged Modulation (Nortec SETC
Only)
53
Condair Online (Nortec SETC Only)
53
Links 2 (Nortec SETC Only)
56 Warranty
The Nortec SETC/P Steam Exchange Humidifier
The Nortec SETC/P is an atmospheric steam generator designed for air humidification via steam
distributor, blower pack, or steam manifold (SAM-e). The Nortec SETC/P uses pressurized steam
from a boiler fed into a heat exchanger submerged in potable, RO, or DI water to generate heat
and steam.
The main applications of Nortec SE series humidifiers is humidification of buildings which have
a high pressure boiler which can also be used for heating or other industrial processes. Nortec
SE humidifiers take the steam produced by the boiler which contains anti-scaling chemicals and
converts it into clean and pure steam for humidification.
How the Humidifier Works
Steam Line
Steam Distributor
CV Valve Actuator
‘P’ Trap
Float Chamber
Tank
Fill Box
Cooling to
Float Chamber
Dual Fill Valve
Boiler
Steam
Vacuum Break
CV Valve
Drain
Outlet
Steam Trap
‘P’ Trap /
Overflow
Heat Exchanger
Condensate
Return to
Boiler
Auxiliary Drain
Lower Mixing
Box
Drain Pump
Figure 1: Humidifier Schematic
Steam Generation

After initial start-up and tank filling the humidifier will sit in standby mode, awaiting a call for
humidity.
1 | The Nortec SETC/P





When a call is received, the humidifier will send a signal to the CV Valve actuator. The
actuator will open as required and the flow of boiler steam will begin.
Energy from the boiler steam is transferred to the fresh water tank through a heat exchanger
inside of the unit. This causes the water to boil. Full boil from a cold tank can take up to 15
minutes. On Nortec SETC models, the Keepwarm feature can be activated to reduce boil
time.
Once the humidifier has reached full boil, the humidifier will modulate the actuator,
controlling the flow of steam into the unit. This will allow the unit to reduce its output level
as the humidity levels in the space being humidifier are reached.
During the boiling process minerals are left behind from the water. The unit will occasionally
activate the drain pump to flush out some of the minerals in the water and reduce the
concentration in the tank. The fill valve will also be activated periodically to replace water
that is boiled off during normal operation.
When the demand to the unit stops, the unit will close the steam valve and steam
production will stop. The unit will enter standby mode and await a call for humidity. If
Keepwarm is activated (Nortec SETC only), the CV valve will be opened periodically to heat
the tank.
Drains



As steam is produced minerals are left behind in the Nortec SE’s tank. The Nortec SE
performs periodic drains to reduce the amount of minerals that will precipitate as scale.
In general more frequent drains result in less maintenance. The amount of water drained to
control mineral concentration in the tank can be configured in the Nortec SETC’s software.
To cool drain water the Nortec SE activates the fill valve whenever the drain pump is
activated. Cool fill water flows down from the fill box and blends with hot tank water in the
lower mixing box before being drawn into the drain pump. The drain cooling feature can be
deactivated via software.
Steam Distribution
Steam generated by the humidifier may be introduced into the air in several different ways. The
most common method for adding the steam into the air is to mount a steam distributor tube in
a supply air duct as shown in Figure 1: Humidifier Schematic. For larger ducts or larger loads it
is also common to use a steam manifold with a single steam line connection and multiple tubes
for distributing the steam. For introducing steam directly into a room, remote mounted blower
packs are used. (see Steam Distribution on page 41)
Steam Line
The steam line between the tank steam outlet and the distributor may be Condair steam hose,
copper pipe, or stainless steel pipe or tube. The Nortec SETC/P is an atmospheric steam
generator so it is very important no restrictions are present in the steam line and that the steam
line is sized properly to carry the full output capacity of the humidifier. It is also important to
minimize the length of steam lines. See Table 11: Maximum Recommended Length of Steam
Line on page 44 for information on selecting steam lines and maximum recommended lengths.
Whenever steam is distributed condensate is formed in the distribution system and steam
distributor, manifold, or blower pack. Insulating steam lines is one important way to reduce the
The Nortec SETC/P | 2
amount of condensate formed. Steam lines must be sloped so that condensate does not collect
in the lines and create a restriction to steam flow.
Condensate Return
The condensate must be collected and removed from the system so that it does not build up
and leak into the duct (or room if blower pack is used). Condensate must be collected and fed
to drain. (see Figure 25: Condensate Traps on page 43)
Nortec SE Humidifier Models
Indoor Models
The Nortec SETC with its Total Controller and state-of-the-art features and options is the most
advanced steam exchange humidifier available. The base model Nortec SEP provides steady and
reliable humidification using the same proven heat exchanger technology as the Nortec SETC. The
Nortec SETC/P is available in capacities ranging from 50 lb/hr (23 kg/hr) to 1050 lb/hr (475 kg/hr).
Nortec SETC/P humidifiers are packaged in five different cabinets depending on their capacity. See
Figure 7: Nortec SE Indoor Dimensions for dimensional information.
SETC50
Note:
SE 750 has
2 steam outlets
SE 525-750
SE 100-175
SE 1050
SE 250-375
Figure 2: Nortec SE Series Indoor Models
3 | The Nortec SETC/P
Nortec SETC Outdoor Models
The Nortec SETC Series Outdoor Models are designed to be rooftop mounted on a roof curb (by
others). When properly installed the outdoor enclosure will provide protection from rain, wind, and
snow in areas with ambient temperature –40 to 104 °F (-40 to 40 °C) and relative humidity 0 100% (non condensing). All outdoor models include a ventilation package to prevent overheating in
warm months, and a freeze protection package to prevent freezing in cold months.
The Nortec SETC Outdoor is available in capacities ranging from 100 lb/hr (45 kg/hr) to 1050 lb/hr
(475 kg/hr). The SETC Outdoor humidifiers are packaged in four different cabinets depending on
their capacity. See
SETC Outdoor 525-750
SETC Outdoor 100-175
SETC Outdoor 250-375
SETC Outdoor 1050
Figure 3: Nortec SE Series Outdoor Models
The Nortec SETC/P | 4
Nortec SETC and the Nortec SEP
The main difference between the Nortec SETC and the Nortec SEP humidifier is in their controls
and user interface. The Nortec SETC model’s Total Controller provides a graphic LCD screen
and keypad, accepts additional control signals, optional building management system
connectivity (BACnet, Lonworks, Johnson N2, and Modbus), and optional Internet monitoring via
Condair Online. The Nortec SEP controls provide the basic functionality required for humidifier
operation. See Table 1: Nortec SETC/P Features for a listing of the two control systems
features. Figure 4 shows the differences in the Nortec SETC’s and Nortec SEP’s user interface.
SETC
SEP
LCD Display and
Input Buttons
(Buttons used to
navigate .
status screens and
configure the
humidifier,
correspond to icons
on the display)
Status LEDs
Software Drain
Button
(Initiates a software
controlled drain)
DEMAND
ON
SERVICE
OFF
FAULT
DRAIN
On/Off Switch
(Turns humidifier
On/Off)
Figure 4: Nortec SETC and Nortec SEP User Interfaces
The Nortec SETC LCD screen and keypad - allow easy configuration of all features of the
Nortec SETC humidifier such as blowdown rate, full tank blowdown, control signals, 3 day drain
and others. The LCD screen also provides status information indicating current status and
configuration, a graph of recent operation, service and fault messages, and troubleshooting
information. One of the key features of the Nortec SETC controller is tracking operation and
providing information about service requirements to make it easy to service and maintain the
Nortec SETC.
5 | The Nortec SETC/P
Nortec SE Humidifier Features
From their integrated steam traps and enclosure’s to the Nortec SETC’s internet based monitoring
capability both the Nortec SETC and Nortec SEP include many advanced features that set them
apart from other humidifiers. The following list outlines some of the Nortec SE series key features.
Table 1: Nortec SETC/P Features
General
SETC
SEP
SETC Outdoor
High efficiency stainless steel heat exchangers
X
X
X
Internal steam trap on each heat exchanger
X
X
X
CV Valve, actuator, and wye strainer included
X
X
X
Modulating output for excellent humidity control
X
X
X
Range of capacities to match load requirements
X
X
X
50 to 10,500 lb/hr output with staged modulation.
X
Standard 120 VAC power requirement
X
X
X
C-UL-US
X
X
X
30 month warranty
X
X
X
Warranty extendable to 3 yrs with Nortec Online
X
Clean and dry atmospheric steam
X
X
X
Heat exchanger with flat sides for easy cleaning.
X
X
X
Wide range of water management options
X
X
Floor or optional stand mounting
X
(adjustable
blowdown)
X
(Curb Mount)
Choice of steam distribution (BP, Distributor, SAM-e)
X
X
X
X
X
Installation / Maintenance
Electronics
Graphic Display Screen with Keypad input
X
X
LED status indicators
X
Remote status via dry points
X
Proportional and Integral Control
X
Internal control from humidity sensor inputs.
X
Manual Capacity Adjustment
X
X
X
On/Off operation
X
X
X
Compatible with all standard Industrial controls
X
(0/2-10 VDC)
X
Single and dual channel control
X
(Single)
X
X
X
X
(Proportional)
X
X
BMS integration via Links 2 to Lonworks, BACnet,
Johnson, Modbus
Option
Option
Nortec Online
Option
Option
Other
Weatherproof Enclosure
X
Curb mount
X
Freeze protection valve and keep warm
X
Electrical cabinet heater and exhaust fan
X
Selectable 3 day drain after no period with no demand
X
Potable, deionized, and reverse osmosis water
X
X
X
X
The Nortec SETC/P | 6
Nortec SE Humidifier Components
Float Chamber
Display and Keypad
Control Terminal Strip
Tank
On/Off Switch
Clean Out
Port
Remote Relay
Board
Heat
Exchanger
Gasket
Driver Board
High Voltage
Terminal Block
Base
Manual Drain Switch
Total Controller
Transformer
Vacuum Break
Steam Outlet
Heat
Exchangers
Fill Box
Steam Inlet
(Faceplate)
(Boiler Steam)
Actuator
Wye Strainer
CV Valve
Fill Valve
Drain Outlet
P Trap
Condensate Drain
(Boiler Steam)
Auxiliary Drain
Outlet
Drain Pump
Steam Trap
Mixing Box
Figure 5: Nortec SETC Humidifier Components
7 | The Nortec SETC/P
Description of Components
Table 2: Humidifier Components
Component
Function of Component
Actuator
Opens and closes the CV valve in proportion to demand for steam.
Auxiliary Drain Outlet
Drains water from tank in case of pump failure.
Base
Provides an integrated floor support for the humidifier.
Clean Out Port
Provides access to clean scale from the tank and heat exchanger.
Condensate Drain
Drains condensate formed from boiler steam in the heat exchanger(s)
Control Terminal Strip
Terminal strip for connecting external controls and blower pack to humidifier.
CV Valve
Controls the amount of steam allowed into the heat exchanger which in turn controls
the output of the humidifier.
Display and Keypad
User interface for configuring the humidifier.
Drain Outlet
Drain port used for draining water from the humidifier tank.
Drain Pump
Drains water from humidifier.
Driver Board
Provides input and output connections to humidifier components.
Fill Box
Provides an air gap for backflow prevention.
Fill Valve
Controls flow of water into humidifier.
Float Chamber
Measures water level in the humidifier tank.
Gasket
Seals heat exchanger face plate and clean out port cover to tank.
Heat Exchanger(s)
Exchanges energy from boiler steam to the tank water to produce steam for
humidification. The faceplate mounts the heat exchanger to the tank.
High Voltage Terminal
Block
Primary power connection from remote disconnect to humidifier.
Manual Drain Switch
Manually activates pump to drain water from the tank.
Mixing Box
Blends hot tank water with cool fill water to provide drain water cooling.
On/Off Switch
Turns power On/Off to humidifier controller. Note: Turn off humidifier disconnect to
shut off primary power to the humidifier.
P Trap
Prevents steam from flowing out the drain outlet.
Remote Relay Board
Provides a terminal strip to dry contacts which open/close to indicate the humidifier is
on, humidifying, needs service, or is in a fault condition.
Steam Inlet
Connection for boiler steam, it is connected to the heat exchangers.
Steam Outlet
Connect to steam line with steam hose.
Steam Trap
Drains condensate from the heat exchanger without letting boiler steam escape to
drain.
Tank
Holds the water used to generate clean steam for humidification.
Total Controller
Controls all functions of the humidifier’s operation and provides user interface for
configuration of the humidifier.
Transformer
Steps primary voltage down to 24 VAC for the controller and internal components such
as the fill valve and drain valve.
Vacum Break
Prevents a siphon from occurring when the drain pump is stopped.
Wye Strainer
Protects CV valve and other system components from dirt and rust in the piping
system.
The Nortec SETC/P | 8
Nortec SE Outdoor Components
Mounting Panel
(External Disconnect)
Steam Outlet
Exhaust Fan
Outdoor Cabinet
Cabinet Thermostat
Cabinet Drain
(Drain Pan)
Heater
Outdoor Mounting Base
(With integral drain
pan)
Lifting Hook (4)
Pipe Chase
(not visible)
Figure 6: Nortec SETC Outdoor Components
Table 3: Nortec SETC Outdoor Components
Component
Function of Component
Cabinet Drain
Drain outlet for integrated cabinet drain pan (outdoor unit only). Drain to rooftop.
Cabinet Thermostat
Sensor that activates the heaters if the cabinet temperature is too cold for the
electronics (will not prevent the tank and water components from freezing).
Exhaust Fan
Cooling fan which is activated if the electrical cabinet gets too hot.
Heater
Electrical cabinet heater used to keep electronics warm enough for operation and
cold weather start up only.
Lifting Hooks
Hooks provided for lifting the humidifier.
Mounting Panel
A panel provided on the outside of the humidifier for mounting a dedicated external
disconnect.
Outdoor Cabinet
An enclosure that provides protection from precipitation and allows the Nortec SETC
to be installed outdoors.
Outdoor Mounting Base
An integrated support for the humidifier which includes a drain pan (outdoor unit
only), a pipe chase, and a means for curb mounting the humidifier.
Pipe Chase
An opening in the outdoor cabinet’s drain pan which is used for routing electrical
power, controls, boiler steam, boiler condensate, fill water, and drain water through
the base of the humidifier.
Steam Outlet
Outlet for steam produced by the humidifier. Connect to steam line with steam hose.
9 | The Nortec SETC/P
Nortec SE Humidifier Specifications and Dimensions
Table 4: Nortec SETC/P Specifications
Nortec
Model
SETC
Indoor
Part No
SEP
Part No.
CV
Valve
CV Valve,
Steam
Inlet, Wye
Port (NPT)
Condensate
Port
(NPT)
Net/Full
Weight
Indoor
lb (kg)
50
2552765
2520383
2.8
1/2
3/4
100
175
250
375
525
750
2550073
2550074
2550075
2550076
2550077
2550078
2525132
2525133
2525134
2525135
2553312
2553313
5.5
10
12
20
28
40
3/4
1
1
1 1/4
1 1/2
2
3/4
3/4
3/4
3/4
1
1
125/180
(57/82)
267/423
(121/192)
355/599
(161/272)
529/992
(240/450)
1050
2550080
2525139
77
2, 2 1/2,
2 1/2
1 1/4
703/1384
(318/628)
Required
fill line
flow
gal (l)
/min
Required
Drain
capacity
gal (l)
/min
2.6 (10)
5.2 (20)
4.5 (17)
8 (29)
Electrical
(Indoor
only, see
Table 6 for
outdoor)
Voltage
110-120
Phase
1
Amps
1.25 A
Power
0.15 KW
Max
Disconnect
15 A
Table 5: Nortec SETC/P Capacities and Water Consumption
Nortec
Model
50
100
175
250
375
525
750
1050
*Supply
Steam
Pressure
(psig)
5
10
15
5
10
15
5
10
15
5
10
15
5
10
15
5
10
15
5
10
15
5
10
15
*Max Output
lb/hr (kg/hr)
13
32
50
26
63
100
46
110
175
65
158
250
98
236
375
137
331
525
195
473
750
273
662
1050
(6)
(14)
(23)
(12)
(29)
(45)
(21)
(50)
(80)
(30)
(72)
(114)
(44)
(107)
(170)
(62)
(150)
(239)
(89)
(215)
(341)
(124)
(301)
(477)
Approximate
Boiler Steam
Consumption
lb/hr (kg/hr)
15
36
58
30
72
115
52
127
201
75
181
288
112
272
431
157
380
604
224
543
863
314
761
1208
(7)
(16)
(26)
(14)
(33)
(52)
(24)
(58)
(91)
(34)
(82)
(131)
(51)
(123)
(196)
(71)
(173)
(274)
(102)
(247)
(392)
(143)
(346)
(549)
**Water
Consumption
gal (l) /hr
2.3
5.7
9.0
4.7
11.3
18.0
8.2
19.8
31.5
11.7
28.3
44.9
17.5
42.5
67.4
24.5
59.5
94.4
35.1
84.9
134.8
49.1
118.9
188.7
*
Supply steam pressure must be present at the CV valve to achieve rated output
**
At maximum output , 25% blow down, and with drain water cooling activated.
(9)
(21)
(34)
(18)
(43)
(68)
(31)
(75)
(119)
(44)
(107)
(170)
(66)
(161)
(255)
(93)
(225)
(357)
(133)
(321)
(510)
(186)
(450)
(714)
**Drain Volume
gal (l) /hr
0.8
1.9
3.0
1.6
3.8
6.0
2.7
6.6
10.5
3.9
9.4
15.0
5.8
14.2
22.5
8.2
19.8
31.5
11.7
28.3
44.9
16.4
39.6
62.9
(3)
(7)
(11)
(6)
(14)
(23)
(10)
(25)
(40)
(15)
(36)
(57)
(22)
(54)
(85)
(31)
(75)
(119)
(44)
(107)
(170)
(62)
(150)
(238)
The Nortec SETC/P | 10
Figure 7: Nortec SE Indoor Dimensions
11 | The Nortec SETC/P
Table 6: Nortec SETC Outdoor Specifications
Nortec
Model
SETC
Outdoor
Part No
Net/Full
Weight
lb (kg)
Amps
,
A
Power
.
KW
Max.
Disconnect
A
Voltage
and
Phase
100
175
250
375
525
750
2550081
2550082
2550083
2550084
2550085
2550086
5.4
5.4
5.4
5.4
9.6
9.6
0.65
0.65
0.65
0.65
1.15
1.15
15
15
15
15
15
15
Voltage
110-120
Phase
1
1050
2550088
267/423
(121/192)
355/599
(161/272)
529/992
(240/450)
703/1384
(318/628)
13.8
1.65
20
Note: See Table 4: Nortec SETC/P Specifications and Table 5: Nortec SETC/P Capacities and Water Consumption
on page 10 of Nortec SE Series Installation manual for remaining specifications
Figure 8: Nortec SETC Outdoor Dimensions
The Nortec SETC/P | 12
Specifying the
Nortec SE Humidifier
14 Humidifier Specification Checklist
15 Humidifier Load
15
Humidification Load
15
Supply Line Losses
16
Distributor Losses
17
18
18
19
19
Supply Steam Pressure
Humidifier Controls
Installation Location
Steam Distribution Method
Nortec Nortec SE Series Options and
Accessories
24 Sample Specification
13 | Specifying the SE Humidifier
Humidifier Specification Checklist
The following checklist can be used to specify the Nortec SE Series Humidifier. A description of
each selection is provided later on in this section.
Humidifier Tag: _______________
Zone _______________
Humidifier Model ____________________________
Part No _______________
Humidifier Load ______________lb/hr =
Humidification Load _______ + Supply Line Losses_______+ Distribution Losses_______
Supply Steam Pressure __________ psi
Capacity at Supply Pressure __________________
Humidity Control
 Demand
 Transducer
 By Others
 By Nortec,
 On/Off
Signal Type _______
Part No_______________
High Limit
 Demand (SETC Only)
 Transducer (SETC Only)
 By Others
 By Nortec,
 On/Off
Signal Type _______
Part No _______________
Location
 Indoor
 Stand,
 Ceiling kit,
Part No _______________
 Outdoor
Steam Distribution
 Duct
Width _____________ Height __________________
 SAM-e
Header Length __________ Tube spacing __________
Part No _______________
Distribution Tube Length ______________ Qty ________
Part No _______________
Steam Inlet type __________________
Part No _______________
 Tube Insulation, Qty ________________
Part No _______________
 Header Insulation,
Part No _______________
 Mounting Frame,
Part No _______________
 Distributor, Length ______________ Qty ____________
Part No _______________
 Blower Pack, Qty ____________
Part No _______________
Additional Options (Links 2, Nortec Online, Air proving… See Table 8: Options and Accessories)
_________________________________________________________________________________
_________________________________________________________________________________
Specifying the SE Humidifier | 14
Humidifier Load
The Nortec SE Series humidifiers are available with capacities ranging from 50 to 1050 lb/hr
(22.5 to 477 Kg/hr). In addition to the available models, up to 10 humidifiers can be combined
together to operate from one control signal for capacities of over 10,500 lb/hr (4,770 Kg/hr).
The humidifier(s) selected must have a capacity equal to or greater than the load.
The humidifier load is made up of three components;
1 Humidification Load - Water that must be added to the air to achieve the desired humidity
level.
2 Supply Line Losses – Water that condenses in the steam lines between the humidifier and
the location where the steam is being introduced into the air.
3 Distributor Losses – Water that condenses in the steam distributor itself.
Steam supply
line
1) Humidification load
+ 2) Supply line losses
+ 3) Distributor losses
= Humidifier Load
1) Humidification
load
Distributor
Humidifier
2) Supply
line losses
3) Distributor
losses
Figure 9: Humidifier Load
Humidification Load
The easiest way to calculate the humidification load for any application is to use Condair’s
Humidifier Engineering and Load-sizing Program (HELP). The software can be downloaded from
www.condair.com. Condair Publication 2553856 - Humidification Load Calculation also
provides information on selecting a humidity setpoint, the effects of relative humidity, and
methods for manually calculating the humidification load.
Supply Line Losses
Table 11: Maximum Recommended Length of Steam Line on page 44 provides maximum
recommended lengths for various steam line sizes as well as possible losses due to
condensation in steam lines. Table 12: Equivalent Length of Some Common Fittings on page
gives equivalent lengths of some common fittings used in making steam lines. The information
in the tables along with information about the layout and length of the steam line should be
used to estimate the supply line losses.
15 | Specifying the SE Humidifier
Example 1: Supply Line Losses - Nortec SE 250 with 30 ft x 3 in. steam line with one 90º elbow.
1 Obtain possible losses for 3 in line from Table 11.
A = 0.16 lb/hr/ft
2 Calculate the equivalent length of steam line using 3 in. 90º Elbow in Table 12.
B = 30 ft + 5 ft = 35 ft.
3 Multiply the equivalent length by the possible losses to get supply line losses.
C = B x A = 35 x 0.16 = 5.6 lb/hr
Distributor Losses
Convection heat transfer between a steam distributor in a duct and the air in the duct is the
primary mechanism responsible for distributor losses. The amount of losses is proportional to
the length of distributor and the temperature of the air in the duct. Figure 10 can be used to
estimate distributor losses.
50ºF Standard
60ºF Standard
70ºF Standard
80ºF Standard
50ºF
60°F Insulated
70°F
80°F
Figure 10: Distributor Losses
Note:
Condair’s patent pending stainless steel Air-gap Insulation provides one method for
reducing a distributor losses and conserving energy. See Condair publication 1503529 –
SAM-e Engineering Manual for more information on specifying SAM-e insulation.
Specifying the SE Humidifier | 16
Example 2: Distributor Losses – What are approximate condensate losses in a 48 “ tall
standard SAM-e with 12 distribution tubes in a 70ºF duct with 1200 fpm velocity.
1 Obtain losses per linear foot of distributor from Figure 10.
A = 0.45 lb/hr/ft
2 Calculate approximate length of all distributor tubes.
B = 12 tubes x 4 ft/tube = 48 ft
3 Multiply approximate length of all tubes by losses per linear foot to get distributor losses.
C = 48 x 0.45 = 21.6 lb/hr
Supply Steam Pressure
One of the unique features of the steam exchange humidifier is that its maximum output is
affected by the steam supply pressure. Models are designated by the capacities at maximum
supply pressure of 15 psi. An Nortec SETC 1050 will produce 1050 lb/hr (477 Kg/hr) of steam
when supplied with 15 psi steam. If the available steam supply pressure is lower than 15 psi
then the output will be reduced as shown in Figure 11. Table 5: Nortec SETC/P Capacities and
Water Consumption also provides steam output at 10 and 5 psi supply pressures.
Maximum Capacity as % of Rated
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
5
6
7
8
9
10
11
Pressure
(Psi)
Pressue
(Psi)
12
13
14
Figure 11: Output as a Function of Supply Steam Pressure
To select the model(s) of Nortec SE humidifier that is required to fulfill a given humidifier load
requirement, the output must be de-rated if the supply steam pressure is lower than 15 psi.
Note:.
The steam supply line must be designed to provide design pressure at the CV valve
when there is 100 % demand (CV valve completely open). Pressure losses in the
steam supply line will reduce Nortec SE output.
17 | Specifying the SE Humidifier
15
Example 3: Nortec SE 250 Output – What is the maximum capacity of a Nortec SE 250 supplied
with 12 psi steam pressure?
1 From Figure 11 the output will be reduced to 78% at 12 psi supply pressure.
2 Multiply capacity at 15 psi by 78% to get max capacity at 12 psi.
Max Capacity (12 psi) = 0.78 x 250 = 195 lb/hr
Humidifier Controls
See Nortec Nortec SETC/P Controls on page 46 for a listing of controls offered by Condair and
installation requirements. The Nortec SETC humidifier can be operated with one or two
modulating inputs. The Nortec SEP has one modulating input which can be used for a duct high
limit or humidity control. Both the Nortec SETC and Nortec SEP can be operated as On/Off.
Controls can be supplied by Condair or by others. Nortec SE humidifiers are compatible with the
following control inputs.
Table 7: SE Series Control Signals
Control Signal
Nortec SETC
Nortec SEP
0-10 V
2-10 V
0-5 V
1-5 V
0-20 mA
4-20 mA
On/Off
Demand and Transducer
Demand and Transducer
Demand and Transducer
Demand and Transducer
Demand and Transducer
Demand and Transducer
Dry Contact 24 VAC
Demand
Demand
Dry Contact 24 VAC
The control signal type can be configured by Condair at the factory or can be user configured.
For the Nortec SETC the configuration is done with the LCD and keypad. On the Nortec SEP it is
done with jumpers on the control board.
Installation Location
Refer to the section on Location on page 30 for details about clearance requirements and
information about optional stands and ceiling kits.
Nortec SE Series Indoor The Nortec SE Series indoor humidifiers are designed to be either floor
mounted or stand mounted (stand optional). Nortec SE 50 models can also be ceiling mounted
with the optional ceiling installation kit. Install only in areas with ambient temperature 41-104
°F (5 – 40 °C) relative humidity 5 - 95% (non condensing).
Nortec SE Series Outdoor The Nortec SETC Series Outdoor Models are designed to be rooftop
mounted on a roof curb (by others). When properly installed the outdoor enclosure will provide
protection from rain, wind, and snow in areas with ambient temperature –40 to 104 °F (-40 to
40 °C) and relative humidity 0 - 100% (non condensing). All models include a ventilation
package to prevent overheating in warm months, and a freeze protection package to prevent
freezing in cold months.
Note:
Internal heaters will not keep the Nortec SETC from freezing in cold climates. They are
intended to maintain electronics at a minimum operating temperature for cold weather
startup. Heat from an operating humidifier’s tank provides the heat to keep the unit from
freezing.
Specifying the SE Humidifier | 18
Steam Distribution Method
Steam may be added to air in a supply air duct or air handler using Condair’s Steam Distributors
or SAM-e manifolds. Steam can also be added directly into a space by using Nortec’s remote
mounted blower packs. Refer to the section Steam Distribution starting on page 41 for
information about steam distribution methods and steam lines used to connect the Nortec SE
humidifier to steam distributors.
See also Condair publications 1503529 – SAM-e Engineering Manual and 2556592 - Steam
Distributor Installation Manual for detailed information about Condair Steam Distribution
Options
Nortec SE Series Options and Accessories
Condair provides a complete line of options and accessories for every humidification
application. Table 8: Options and Accessories lists available options available for the Nortec SE
Series with a brief description of their function. A complete list of the options which can be
used with the Nortec SE Series along with their corresponding part numbers is given in the
Chapter titled Submittals.
Table 8: Options and Accessories
Option / Accessory
Steam Distributors
Used For
Steam Distributors are used for adding steam into air ducts.
They are available in three different models . Each model is also
available in different lengths. Distributor length should be
chosen to fit the full width of the duct leaving installation
clearance. Maximum capacity of each distributor is;
ASD = 25 lb/hr (11.4 kg/hr)
BSD = 35 lb/hr (15.9 kg/hr)
CSD = 115 lb/hr (52 kg/hr)
(See Condair Publication 2556592 – Steam Distributor
Installation Manual for a listing of Condair Distributor models and
part numbers)
Remote Blower Pack
Remote blower packs are used for adding steam directly into a
space remote from the humidifier. The remote blower pack is
available in 2 different sizes for capacities ranging from 5-30
lb/hr (2.3 –13.6 kg/hr) and 50-100 lb/hr (22.7 – 45 kg/hr). For
the SE the larger blower pack must be used.
One blower pack can be used per humidifier for capacities up to
100 lb/hr (45 kg/hr) . For higher capacities a minimum of one
blower pack per 100 lb/hr (45 kg/hr) of steam being dispersed is
required.
2530900 - Remote Blower Pack 50 - 100 lbs/hr 110-120V
(See Condair Publication 2525151 – Blower Pack Installation
Manual for additional information about Blower Packs)
19 | Specifying the SE Humidifier
Table 8: Options and Accessories (Continued)
Option / Accessory
SAM-e Steam Distribution Manifold
Used For
The SAM-e Steam Distribution Manifold is used for adding steam
into air ducts where either higher steam capacity or short
absorption is required.
The SAM-e consists of dispersion tubes with stainless steel
nozzles that draw dry steam from the center of the tube, a
header for supplying steam to each dispersion tube, steam inlet
connection, an optional frame, and optional insulation.
The SAM-e is available in a range of sizes and dispersion tubes to
match duct dimensions and steam capacity as closely as
possible.
(See Condair Publication 1503529 – SAM-e Engineering Manual
for a listing of SAM-e models and part numbers)
Nortec SE Stand
The optional Nortec SE floor stand positions the Nortec SE
humidifier at a convenient working height and provides
additional clearances for sloping drains. The stand must be
assembled at site.
2525140 - Floor Stand Kit, GS 100, SE 100/175
2525141 - Floor Stand Kit, GS 200, SE 250/300
2525142 - Floor Stand Kit, GS 300/400, SE 525/750
2525143 - Floor Stand Kit, GS 500/600, SE 1050
(See also Mounting on Optional Stand on page 31)
Nortec SE 50 Ceiling kit
Condair offers an optional ceiling mounting kit (part number
2520345) which allows the Nortec SE50 to be ceiling mounted
with zero clearance to the ceiling.
2520345- Ceiling Mount Kit c/w Drip Pan, SE 050
(See also Ceiling Mounting (Nortec SE50 Only) on page 32)
On/ Off Humidistats
On/Off Humidistats are used to turn the humidifier on and off
based on sensed RH. They can be mounted in the space being
humidified or in the return air duct. The digital humidistat
provides an LCD screen and keypad for setting the RH setpoint
and displaying sensed RH.
(See On/Off Controls on page 47)
2548731 - On/Off Wall Humidistat
2548732 - On/Off Duct Humidistat 1329203 - Air Proving Switch .
Modulating Humidistats
1510142 - Digital Wall Humidistat
2520261 - Digital Wall W/O Sensor
1509858 - Wall Sensor
2520266 - Digital Duct Humidistat Package .
Modulating Humidistats are used to control the output of the
humidifier based on sensed RH. They can be mounted in the
space being humidified or in the return air duct. The digital
humidistat provides an LCD screen and keypad for setting the RH
setpoint and displaying sensed RH. They can be used for either
controlling humidity or for high limit control.
(See Modulating Humidistats on page 47 )
Specifying the SE Humidifier | 20
Table 8: Options and Accessories (Continued)
Humidity Transducers
1509858 - 2-10V Wall Humidity Transducer
1509857 - 2-10V Duct Humidity Transducer .
Digital Humidity Transducers communicate RH in a space or duct
to the humidifier. When used with an Nortec SETC (not
Nortec SEP) the humidifier displays the sensed RH on its LCD
display screen, setpoints are entered using the humidifier keypad
and the humidifier’s software calculates required output based
on setpoint and sensed RH. Transducers are available for room
or duct installation.
(See Humidity Transducers on page 48)
Outdoor Temperature Sensor
The outdoor temperature sensor is used in conjunction with
Condair’s Digital humidistats to provide a humidity setpoint reset
when outdoor temperature is very low. The setpoint is reduced
to prevent condensation on windows and other parts of a
buildings structure.
2520263 - Duct Mount Outdoor Temperature Sensor
2520263 - Outdoor Temperature Sensor .
Air Proving Switches
(See Outdoor Temperature Reset on page 49)
Air proving switches are used to ensure humidification only
occurs when air is moving in a duct. The air proving switch is
installed in series with all other On/Off devices on the
humidifier’s On/Off/security loop.
1329203 - Air Proving On/Off Duct Mounted
(See On/Off Controls on page 47)
High / Low Humidity Alarm Packages
Various alarm packages are available for indicating when
humidity is outside of required limits. The packages include a
mechanical humidistat and display panel with a light.
2533363 – High Duct Humidity Alarm Package
2533365 – Low Duct Humidity Alarm Package
2533364 – High Room Humidity Alarm Package
2533366 – Low Room Humidity Alarm Package
Control Setting at Factory
Control
Signal?
The Nortec SETC /P can be factory ordered configured for the
type of controls that will be used. Factory configuration
eliminates the need to configure the Nortec SETC/P in the field
and makes it plug and play with respect to software
configuration. Part numbers are available for each available
control configuration.
(See Control Acceptance Configured at Factory on page 49)
Links 2
Links II provides connectivity to BACnet, Lonworks, Johnson N2,
or Modbus building management systems. A separate part
number must be selected to specify the type of building
management system. (Nortec SETC only)
2527110 - Links 2 For Nortec GS/SE, BACNET/IP
2527111 - Links 2 For Nortec GS/SE, BACNET/MSTP
2527112 - Links 2 For Nortec GS/SE, LONWORKS
2527113 - Links 2 For Nortec GS/SE, N2
2525535 - Links 2 FOR Nortec SE-50, BACNET/IP
2532740 - Links 2 For Nortec SE-50, BACNET/MSTP
2532741 - Links 2 For Nortec SE-50, LONWORKS
2532742 - Nortec Links 2 For SE-50, N2
(See Links 2 (Optional Nortec SETC Only)on page 53)
21 | Specifying the SE Humidifier
Table 8: Options and Accessories (Continued)
.Condair Online
Condair Online provides remote monitoring of humidifiers over
the internet using standard web browsers. The system can be
configured to send emails to service personnel, Condair agents,
and the factory when the humidifier requires service. It also
provides a trend history of humidifier performance and allows
factory staff to remotely diagnose service issues and configure
software. (Nortec SETC Only)
1509600 - Condair OnLine, Static IP for GSTC/SETC
1509601 – Condair OnLine, DHCP for GSTC/SETC
1509681 – Condair OnLine, Slave for GSTC/SETC
1509682 - Condair OnLine, Add 1YR Monitoring
(See Condair Online (Optional Nortec SETC Only) on page 53)
External Drain water Cooler
The external drain water cooler can be used for cooling hot
water such as condensate before feeding it to drain. The cooler
includes a tank, water valve (electric or pneumatic) and
thermostat.
1710010 – Drain Water Cooler Self Actuated
1710020 – Drain Water Cooler Electric
Steam and Condensate Hose
Steam hoses are used as steam distribution lines or for making
connections to 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 for
connecting to copper or stainless steel condensate lines.
1328810 – Steam Supply Hose7/8 in. ID. 1 ft (30 cm)
1328820 - Steam Supply Hose 1 3/4 in. D 1 ft (30 cm)
1328840 – Condensate Hose 3/8 in. ID 1 ft (30 cm)
Steam Line reducers
Steam Line Adapters
( See also Steam Lines and Condensate Returns on page 42)
Condair recommends increasing the diameter of long steam
distribution lines to prevent back pressure. Steam line reducers
can be used for transitions to/from the increased diameter
steam lines.
1507846 – Steam Line Reducer 1¾ to 7/8 in. Copper
1508165 - Steam Line Reducer 1¾"o 7/8 in. Stainless
Steel
Steam line adapters are used for connecting multiple steam lines
into a single larger steam line. All adapters include a condensate
drain to prevent build up of condensate. Condair offers a range
of adapters suitable for combining up to 8 x 1 ¾ in. steam lines.
1502569 – Adapter 3 in to 2 x 1 3/4 in
1505270 – Adapter 3 in to 3 x 1 3/4 in
1505271 – Adapter 4 in to 3 x 1 3/4 in
1505272 – Adapter 4 in to 4 x 1 3/4 in.
(See Condair Publication 1503529 SAM-e Engineering Manual)
Specifying the SE Humidifier | 22
Table 8: Options and Accessories (Continued)
Large / Small Condensate Trap
Condensate traps must be used to remove condensate that
forms in steam distribution lines. Condair offers copper
condensate traps to match its large and small steam hose.
1329634 – Steam Line Reducer 7/8 x 7/8 x 3/8
1329635 - Steam Line Reducer 1 3/4 x 1 3/4 x 3/8
(See also Figure 25: Condensate Traps on page 43)
Double Check Valve
The Nortec SETC/P includes an air gap in its fill cup to prevent
back flow to the supply water system. The double check valve
can be used as additional protection or when local plumbing
codes require it.
1458807 - Double Check Valve For Water Inlet Line
In Line Water Filter and replacement Filters
The inline water filter can be used for supply water which
contains a large amount of sediment that could block the
Nortec SETC/P cylinder strainer or drain valve.
1329505 - In-Line Water Filter 5 Micron Filter
1329561 - Replacement Water Filters 1 Micron
1329506 - Replacement Water Filters 5 Micron
Condensate Pump
The condensate pump can be used for pumping either drain
water from the Nortec SETC / P or condensate where gravity feed
to a drain is not possible.
1429527 - Drain Water Sump Pump (High Temperature)
Air Gap Reducer
All Nortec SETC/P humidifiers require an air gap on the drain line
as close as possible to the humidifier. The air gap reducer is a
copper fitting that can be used to provide the air gap.
2522172 - Factory Provided External Drain Air-Gap
Reducer
Pocket Hyrgo Thermometer
The pocket hygro thermomenter provides a means for easily
checking the humidity and temperature in a space and is a
useful tool for troubleshooting humidity problems.
1469595 - Pocket Hygro-Thermometer Digital
Display
Note:
All illustrations of options / accessories are provided strictly for the purpose of describing them. Actual appearance of each option
accessory may differ from that shown.
23 | Specifying the SE Humidifier
Sample Specification
PART 1 - GENERAL
1.1 Work Included:
A. Nortec SETC Series Steam Exchange 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. Manufacturer: For each product specified, provide components by same manufacturer
throughout.
B. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70,
Article 100, by a testing agency acceptable to authority having jurisdiction, and marked for
intended use.
C. Comply with ARI 640, “Standard for Commercial and Industrial Humidifiers.”
D. Products shall be supported with a warranty that ensures the product will be free from
defects in materials and workmanship for a period of two years after shipment.
E. Commissioning of a system or systems specified in this section is part of the construction
process. Documentation and testing of these systems, as well as training of the Owner’s
operation and maintenance personnel, is required in cooperation with the Commissioning
Authority. Project Closeout is dependent on successful completion of all commissioning
procedures, documentation, and issue closure. Refer to Project Closeout, Section 01700, for
substantial completion details. Refer to Section 01810, Commissioning, for detailed
commissioning requirements.
F. Products specified below are to be manufactured in an ISO 9001-2000 certified facility.
1.3 Submittals:
A. Submit product data under provisions of Section 15010. 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. Submit minimum water quality requirements and water pressure requirements.
1.4 Extra Materials:
A. Furnish extra materials described below that match products installed and that are packaged
with protective covering for storage and identified with labels describing contents.
1.5 References:
A. ANSI/NFPA 70 – National Electrical Code.
Specifying the SE Humidifier | 24
1.6 Coordination:
A. Coordinate location and installation of humidifiers in ducts and air-handling units. Revise
locations and elevations to suit field conditions and to ensure proper humidifier operation.
XXXXX OR XXXXX
A. Coordinate location and installation of humidifier in the space it serves with the electrical,
mechanical, and plumbing contractors.
PART 2 - PRODUCTS
STEAM EXCHANGE HUMIDIFIER Nortec SETC
A. Packaged unit, Steam Exchange humidifier operating with boiler steam pressures between 5
psi to 15 psi, with output capacities up to 1050 lbs/hr (477 kg/hr), suitable for immediate, or
future, use of all water types including, De-Ionized (DI), Reverse Osmosis (RO), potable and
softened water, without modification required. Certified by UL.
B. Methods of distribution require a steam distributor[s] or Short Absorption Manifold [s] (SAMe) for mounting into AHU/duct[s] or Remote Mounted Blower Pack[s] (RMBP) for direct space
applications (refer to options schedule).
C. Stainless steel heat exchanger[s] shall have flat surfaces to retard scale build-up. Tubular
heat exchangers are not acceptable.
1. Removable heat exchanger[s] with modular, horizontal design for easy handling during
maintenance.
2. Large surface area promoting equal distribution across surface area and good heat transfer.
Pre-formed welded frame construction to minimize weld area and leakage potential.
3. Heat exchanger[s] are constructed from 316L stainless steel. Copper exchanger[s], Teflon
coating, and nickel plating not acceptable.
4. Access through front panel for easy removal of heat exchanger(s) for maintenance.
5. Stainless steel tank lid with gasket, easily removed for maintenance.
6. Float and thermostatic (F & T) trap[s], must be included internal to the unit by the
manufacturer.
7. Inlet steam pressure must not exceed 15 psig. Need not meet pressure vessels act.
D. Enclosed cabinet, powder coated steel construction and air gap between cabinet and
insulated humidifier tank ensures safe surface temperature.
1. Evaporation tank and all internal tank components to be constructed of 304 stainless steel.
2. All tank surfaces shall be insulated with minimum 1" (25 mm) thick insulation and enclosed
within unit cabinetry to ensure safe surface temperature, high overall efficiency, and fast unit
response time. Units with exposed insulation shall not be acceptable.
3. Maintenance shall not require the removal of the steam distribution lines.
4. Standard internal drain water cooler to ensure drain water tempering to 140º F (60º C). If
external drain water cooler required, provide factory cross-braced unit stand and factory
supplied stainless steel p-trap.
5. Blow-down p-trap, factory installed, enclosed in cabinet, prevents steam leakage to drain.
Field installation not acceptable.
25 | Specifying the SE Humidifier
6. Provide easily accessible, primary voltage terminal block, internal to cabinetry, for single point
field connection of electrical supply.
7. Single point connection for pressure steam inlet must be provided. Internal piping from
steam valve to heat exchanger[s] must be factory installed and tested. Field piping from the
inlet to the exchanger[s] is not allowed.
8. Humidifier to prevent “back-siphoning” using an internal air gap for supply water, to meet
local plumbing codes.
9. Drain line to include a vacuum breaker to prevent siphon drainage of the tank.
E. Automatic water level control within a separate float chamber, isolated from the boiling
action, to prevent false water level indication.
1. Fill rate must modulate to match capacity demand to ensure consistent output. Fill cycles
based on low water only is not acceptable.
2. System shall fill through the bottom of the tank to reduce steam-quenching effect and noise
level. Filling at top of the tank is not acceptable.
3. Unit water level is to be continuously monitored with a dual magnetic electronic float system,
located outside of the boiling water to ensure accurate water level control and reduced
maintenance. Cool fill water is to be supplied into the sensing chamber to keep the device cool.
Systems using conductivity probes or floats located within hot reservoir water are not
acceptable.
4. Float chamber must be located outside of the tank to keep the floats away from the boiling
action. Units with floats in the tank as well as conductivity probes are susceptible to inaccurate
water level sensing and failure, will not be considered.
5. Humidifier shall have a dual fill valve to feed water to the tank and float chamber, to reduce
scaling and mineral build up on the magnetic floats.
6. Float chamber to include LED indication of five possible water level indications.
7. Ongoing self-diagnostics including periodic float operation and fill/drain rate verification.
8. Positive drainage/blow-down using a drain pump, drawing water from the bottom of the tank,
maximizing mineral evacuation (when applicable). Skimmer not acceptable.
9. Blow down interval shall be based on actual steam production, and must be adjustable to
compensate for all water conditions, to ensure maximum energy and maintenance efficiency.
10. Pre-cleaning flushing feature shall be provided to reduce maintenance time.
11. Must include end of season blow-down feature to evacuate contained water and minerals
after 72 hours with no demand for humidification.
F. Factory mounted, full size, backlit, Liquid Crystal Display provides full operational status.
Display to include a keypad for user interface and adjustment of operational parameters
including:
1. Unit output (%).
2. Water level in the tank.
3. Modulating control demand status.
4. On/off control and safety (High limit, air proving) circuit status.
5. Actual room and/or duct rh, and humidity set point, when using transducer input[s].
Specifying the SE Humidifier | 26
6. Controller configuration (Proportional band and integral) when using transducer input[s].
7. Troubleshooting guide with scroll down menu.
8. Fault indication including date and time history.
9. Maintenance intervals.
10. Fill and drain status.
11. Drain/flush intervals and duration.
12. Date and time.
13. Capacity limitation.
14. 72 hours drain enable/disable.
15. Control type configuration on/off or full modulation when demand signal(s), or transducer
input[s] are provided.
16. Up to 10 humidifiers, supplying one AHU or area, can be controlled in series from one
modulating humidity control system.
17. Capability of interface to building management system using BACnet or LonTalk protocols.
(Links) Note: All operational parameters factory set to reduce field set-up time.
G. Standard of acceptance:
Nortec SETC.
H. Optional accessories:
1. Refer to options schedule.
PART 3 - EXECUTION
3.1 Examination:
A. Examine ducts, air-handling units, and conditions for compliance with requirements for
installation tolerances and other conditions affecting performance.
B. Examine roughing-in for piping systems to verify actual locations of piping connections before
humidifier installation.
C. Proceed with installation only after any unsatisfactory conditions have been corrected.
3.2 Installation:
A. Install humidifiers and steam dispersion panels per manufacturers’ instructions
B. Seal humidifier dispersion-tube duct penetrations with flange.
C. Install with required clearance for service and maintenance.
3.3 Testing:
A. System verification testing is part of the commissioning process. Verification testing shall be
performed by the Contractor and witnessed and documented by the Commissioning Authority.
Refer to section 01810, Commissioning, for system verification tests and commissioning
requirements.
XXXXX OR XXXXX
A. Manufacturer’s Field Service: Engage a factory-authorized service representative to inspect
field-assembled components and equipment installation, including piping and electrical
connections. Report results in writing.
27 | Specifying the SE Humidifier
1. Leak Test: After installation, charge system and test for leaks. Repair leaks and retest until no
leaks exist.
2. Operational Test: After electrical circuitry has been energized, start units to confirm proper
unit operation. Remove malfunctioning units, replace with new units, and retest.
3. Test and adjust controls and safeties. Replace damaged and malfunctioning controls and
equipment.
3.4 Training:
A. Training of the Owner’s operation and maintenance personnel is required in cooperation with
the Commissioning Authority. Provide competent, factory authorized personnel to provide
instruction to operation and maintenance personnel concerning the location, operation, and
troubleshooting of the installed systems. The instruction shall be scheduled in coordination with
the Commissioning Authority after submission and approval of formal training plans. Refer to
System Demonstrations, section 01670, for contractor training requirements. Refer to section
01810, Commissioning, for further contractor training requirements.
XXXXX OR XXXXX
A. Engage a factory-authorized service representative to train Owner’s maintenance personnel
to adjust, operate, and maintain humidifiers.
1. Train Owner’s maintenance personnel on procedures and schedules for starting and
stopping, troubleshooting, servicing, and maintaining equipment and schedules.
2. Review data in maintenance manuals. Refer to Division 1 Section “Contract Closeout.”
3. Review data in maintenance manuals. Refer to Division 1 Section “Operation and
Maintenance Data.”
4. Schedule training with Owner, through project manager or project engineer, with at least
seven days advance notice.
Specifying the SE Humidifier | 28
Humidifier Installation
Requirements
30 Location
30
General Location Requirements
30 Indoor Location
31
Mounting on Optional Stand
32
Ceiling Mounting (Nortec SE50 Only)
33 Outdoor Location
34
Nortec Nortec SETC Outdoor Curb
35 Plumbing
37
Freeze Protecting Water Supply
38 Boiler Steam and Boiler Condensate
Return
40 Electrical
41 Steam Distribution
42
Steam Lines and Condensate Returns
46 Nortec Nortec SETC/P Controls
47
Controls
50
Control Location
51
Control wiring
52
Staged Modulation
53 Condair Online and Links 2
NOTE:
The following sections provide an outline of the installation
requirements. For detailed installation instructions refer to
Document No. 2552940 Nortec SE Series Installation and
Operation Manual and to Document No. 2552939 Nortec SE
Outdoor Supplemental Installation and Spare Parts Manual .
29 | Humidifier Installation Requirements
Location
General Location Requirements








Ensure mounting surface is strong enough to support the full weight of the humidifier and
accessories (see Table 4: Nortec SETC/P Specifications and Table 6: Nortec SETC Outdoor
Specifications)
Install in location where electrical power, boiler steam, and drain (with proper slope) can be
connected to the humidifier.
Install in a location where regular maintenance can be performed.
When possible install below the steam distributor. If mounted above the steam distributor
take care to provide proper steam line routing and proper condensate traps.
DO NOT locate the humidifier any further then absolutely necessary from the steam
distributor location as net output will be reduced as a result of heat loss through the steam
line.
The humidifier cannot be used as a structural member. All piping connected to the unit
must be supported independently.
Avoid mounting humidifier on combustible surfaces including (but not limited to) carpet, tile,
or certain insulating materials.
Clearance dimensions shown are for reference only and are the minimum required for
maintenance of the humidifier. Consult local and national codes before final location and
installation. Condair does not accept responsibility for installation code violations.
Indoor Location
As Close as
Possible to Steam
Distributor
Mount
HumidifierLevel
36 in. (91 cm) Min.
Top Clearance
(0 in. for SE50 only)
5-95%
30 in.
(76 cm)
30 in.
(76 cm)
30 in.
(76 cm)
Min.
SE 1050
only
Min. Side
Clearance
Min. Front
Clearance
Condensate drain
line must be
sloped down, do
not use to lift
condensate
Figure 12: SE Indoor Installation Location / Clearance
The Nortec SE series humidifiers are designed to be either floor mounted or stand mounted
(stand optional). Nortec SE 50 models can also be ceiling mounted with the optional ceiling
installation kit.
Humidifier Installation Requirements | 30
Mounting on Optional Stand
Note:. Condensate drain line must be sloped downward to boiler condensate return.
Use pump (by others) or stand (optional) if necessary.
The optional Nortec SE floor stand positions the Nortec SE humidifier at a convenient working
height and provides additional clearances for sloping drains. The stand must be assembled at
site on a level surface and permanently secured the floor via the holes in the leg support plates
following any local codes or regulations. See Table 8: Options and Accessories on page 19 for a
listing of Stand part numbers.
Fasten SE humidifier
to stand with bolts,
lock washers, and nuts
provided. Tighten
to 200 in-lb (22.6 Nm).
30 in.
(76 cm)
Note: Center support only
present on SE 525
and larger.
Mount stand on level surface
Ensure humidifier is Level
Secure stand to floor
four places.
(hardware by others)
Figure 13: Optional Nortec SE Indoor Stand
31 | Humidifier Installation Requirements
Ceiling Mounting (Nortec SE50 Only)
Condair offers an optional ceiling mounting kit (part number 2520345) which allows the Nortec
SE50 to be ceiling mounted with zero clearance to the ceiling. Follow the following guidelines
for installation.
 The Nortec SE50 weighs 180 lb (82 kg) when filled with water and without any accessories
or piping. It is the installer’s responsibility to calculate the total weight which must be
supported, to ensure the ceiling structure is adequate, and to install support rods and to
connect drain pan per local codes and regulations.
 A drain line emptying into an open drain must be connected to the ceiling kit drain pan.
Nortec recommends a 1/2 in. pipe with sufficient slope to ensure any water collected in the
pan will drain from it.
Note:. The Nortec SE50 requires regular maintenance including removal of scale from the
heat exchanger and tank. Make sure it is installed in a location where the maintenance
can be performed.
12.8 in.
(32.6 cm)
.8 cm )
14 .5 in. (3 6
Anchor 3/8 in (M10)
support rods to ceiling
(by others)
Sloped drain
1/2 in. pipe
(by others)
Support rods and hardware
(by others) must not extend
below support bracket flange.
Figure 14: Ceiling Mounting the Nortec SE50
Humidifier Installation Requirements | 32
Outdoor Location
36 in. (91 cm) Min.
top clearance
(SE525 - 1050 only)
Mount
HumidifierLevel
0-100%
(Non
Condensing)
30 in.
(76 cm)
30 in.
(76 cm)
Min.
(SE 525 1050 only)
Min. Side
Clearance
As Close as
Possible to Steam
Distributor
10 in.
(25 cm)
Min.
30 in.
(76 cm)
(SE5251050 only)
Min. Front
Clearance
15 in. (37 cm) Curb
Recommended
Figure 15: Nortec SETC Outdoor Installation Location / Clearance
Caution: When installing the Nortec SETC Outdoor in conditions where freezing
temperatures may occur ensure that freeze protection guidelines are followed. See
Freeze Protecting Water Supply on page 37.
The Nortec SETC Series Outdoor Models are designed to be rooftop mounted on a roof curb (by
others). When properly installed the outdoor enclosure will provide protection from rain, wind,
and snow in areas with ambient temperature –40 to 104 °F (-40 to 40 °C) and relative
humidity 0 - 100% (non condensing). All models include a ventilation package to prevent
overheating in warm months, and a freeze protection package to prevent freezing in cold
months.




The Nortec SETC Outdoor is designed to be mounted on a roof curb. Use pipe chase in
enclosure base for routing of services to the humidifier from below. See Figure 16: Nortec
SETC Outdoor Roof Curb and Table 9: Nortec SETC Roof Curb Depth (Dimension A) for roof
curb dimensions and pipe chase location..
Seal building after plumbing to ensure that building pressure remains as intended.
Avoid installing the humidifier in an area where building exhaust may enter the cabinet
through ventilation louvers. A minimum clearance of 10ft (3m) from mechanical exhaust
outlets is recommended.
Install so that ventilation louvers are not obstructed and cannot be blocked by accumulation
of ice and snow.
33 | Humidifier Installation Requirements
Nortec SETC Outdoor Curb
The base of the Nortec SETC includes a drain pan with a pipe chase to route water, drain, boiler
steam, boiler steam condensate, control wiring, and primary power wiring. The roof curb should
be designed to support the base and allow services to be routed to the humidifier through the
pipe chase.
Roof Curb
34.1 in (86.6 cm)
0.7 in (17.5 mm)
5 in (13 cm)
6 in (15 cm)
0.75 in
(19 mm)
15 in. (38 cm)
3.75 in. (9.5 cm)
Max.
Pipe Chase
Location
A
Front
Figure 16: Nortec SETC Outdoor Roof Curb
Table 9: Nortec SETC Roof Curb Depth (Dimension A)
Nortec Model
A (Inside Curb Depth)
In (cm)
100
175
250
375
525
750
1050
8.6 (28 cm)
8.6 (28 cm)
15 (38 cm)
15 (38 cm)
30.6 (78 cm)
30.6 (78 cm)
46.3 (118 cm)
Humidifier Installation Requirements | 34
Plumbing
0.75 in. (19 mm). OD
un-threaded drain outlet
Connect with hose cuff
and hose clamps.
1/2 in. NPT
Use union to connect
supply pipe to unit.
Always install a water
shut-off valve.
Air gap required.
2 1/2 in. to 1 1/4 in. copper
reducer is ideal.
Hose/line must not touch
the bottom of the funnel.
Min. 1 1/4 in. OD drain line.
Slope down. Increase size
if combining multiple drains.
Axillary drain, 1/2 in. female NPT
For draining tank without pump. Leave
valve closed except if freeze protection is installed.
*Pipe, unions, and water shut-off valve supplied by others.
Figure 17: SE Indoor Water Supply and Drain Connection
Note: Supply cold potable water, deionized water or reverse osmosis water at 30 - 80
PSIG.
Hardness 5-7 grain or 90 – 120 mg/l (as Ca+2 as CaCO3)
Total Dissolved Solutes (TDS) 0.5-3 mg/l or Conductivity 1 to 70 mho/cm
Chlorides 0-25 ppm
PH 7.2-8.5 Alkalinity 30-130 mg/l (as CaCO3)

All water supply and drain line connections must be installed in accordance with local
plumbing codes.



See Table 4 and Table 5 on page 10 for supply water flow requirements.
Install water shut off valve and union before humidifier to facilitate servicing.
Insure drain line is adequately sized to provide free and easy draining and that an air gap is
installed as shown. See Table 4 and Table 5 on page 10 for flow requirements.
Auxiliary drain connection with manual shut off valve is recommended for all units. Valve to
be left closed on units without freeze protection option installed. Valve to be left open on
units with freeze protection option installed except during servicing.
High hardness or silica content supply water may require increased maintenance.
Unit damage caused by water quality outside of the specified ranges is not covered under
warranty.



35 | Humidifier Installation Requirements
Fill Valve
Fill Connection
1/2 in. male NPT
Drain Connection
0.75 in. (19 mm). OD
un-threaded.
Freeze
Protection
Valve
Insulate and heat trace
water supply line up to fill
valve if installed where
freezing can occur.
Pipe
Chase
Freeze Protection
Valve Connection
1/2 in. male NPT .
Always install a water
shut-off valve. See “Freeze
Protecting Water Supply”.
Air gap required
2 1/2 in. to 1 1/4 in. copper
reducer is ideal.
Hose/line must not touch
the bottom of the funnel.
Min. 1 1/4 in. OD drain line.
Slope down. Increase size
if combining multiple drains.
*Pipe, unions, insulation, heat trace, and water shut-off valve supplied by others.
Figure 18: Nortec SETC Outdoor Water Supply and Drain Connection
Caution:

When installing the Nortec SETC Outdoor in conditions where freezing temperatures
may occur follow instructions in Freeze Protecting Water Supply on page 37 to prevent
damage in case of power failure or humidifier fault.

Internal heaters will not keep the Nortec SETC from freezing in cold climates. They are
intended to maintain electronics at a minimum operating temperature for cold
weather startup. Heat from an operating humidifier’s tank provides the heat to keep
the unit from freezing
Humidifier Installation Requirements | 36
Freeze Protecting Water Supply


Caution:.
When installing the Nortec SETC Outdoor in condition where the temperature may drop
below 32 ºF (0 ºC) always follow these guidelines to protect the water supply line from
freezing. A frozen and burst water line can cause serious damage to property.
Heat trace and insulate the water supply line all the way up to the fill valve.
In case of power shut off or power failure the water supply line will not be protected
from freezing by the heat trace. Water trapped in the supply line may freeze and cause
damage. Install the valve system outlined below to shut off water inside the building
and drain any water in the supply line. Valves, fittings, insulation and heat trace
shown are supplied by others.
To Humidifier
Heat trace
and insulate
Inside Building
Remote Relay Board
in humidifier
Normally Open Valve
NO
COM
NO
COM
NC
NO
COM
NC
NO
COM
Error
Relay
Normally Closed Valve
24 VAC
(From Transformer)
Ground
Water Supply Line
Figure 19: Freeze Protecting Water Supply
37 | Humidifier Installation Requirements
To Drain
Boiler Steam and Boiler Condensate Return
Note:.



Damage to Nortec SE heat exchanger will occur if it is exposed to pressure above 20
psi. A safety relief valve must be installed to prevent the Nortec SE from being exposed
to pressure in excess of 15 psi when the SE is connected to a medium or high
pressure boiler via a pressure reducing valve.
The steam supply line must be designed to provide design pressure at the CV valve
when there is 100 % demand (CV valve completely open). Pressure losses in the
steam supply line will reduce Nortec SE output.
Condensate must be drained to a non-pressurized boiler condensate return line.
Boiler steam supply
line. Max 15 psi, Min 5 psi
measured at CV Valve
6 in.
(15 cm)
Max
Actuator
Boiler steam
inlet port location
on SE 1050
CV Valve
(see table 2)
Pressure
gauge (optional)
F&T Trap
Wye Strainer
Isolation Valve
Boiler steam
inlet port
(see table 2)
Condensate Drain
Port (see table 2)
Slo
pe d
Condensate drain line.
Gravity feed to boiler.
Use pump if condensate
must be lifted.
Note: Nortec supplies CV valve, actuator
and wye strainer. All other
components and fittings by others.
ow n
on l
y
Not pressurized
condensate header
(slope down)
Pressurized condensate
header
Figure 20: Nortec SE Indoor Boiler Steam and Condensate Connection
The port sizes of the CV valve, boiler steam inlet port, and condensate drain port are given in
Table 4: Nortec SETC/P Specifications on page 10. Follow the following guidelines for
installation.

All steam line connections must be installed in accordance with local codes.
Humidifier Installation Requirements | 38



Boiler steam supply line design is the responsibility of the installer. The boiler steam supply
line must be designed so that that design pressure is present at the CV valve when the CV
valve is completely open (100% demand). The diameter of the supply line up to the wye
strainer may have to be oversized to insure proper steam pressure.
The Nortec SE will operate on supply steam pressures between 5 and 15 psi measured at
the CV valve. Lower steam supply pressures will result in lower output. See Table 5: Nortec
SETC/P Capacities and Water Consumption on page 10 for capacities at different supply
pressures.
If condensate cannot be gravity fed to the boiler then a pump must be used to lift the
condensate. See Spirax Sarco (www.spiraxsarco.com) and others for pumps and additional
information on condensate management.
supplies CV valve, actuator,
Note: Nortec(Supplied)
and wye strainer. All other
components and fittings by others.
Boiler steam
inlet port
(see table 2
for size)
F&T Trap
Condensate Drain
Port (see table 2
for size)
CV Valve
As close as
possible to
humidifier.
Actuator
CV Valve
(see table 2
for size)
Wye Strainer
Isolation Valve
Boiler steam supply
line. Max 15 psi, Min 5 psi
measured at CV Valve
Condensate drain line.
Gravity feed to boiler.
Use pump if condensate
must be lifted.
Figure 21: Nortec SE Outdoor Boiler Steam and Condensate Connection
39 | Humidifier Installation Requirements
Electrical
Caution:
All Nortec SE humidifiers operate on 120 VAC, single phase, 60 HZ power. Refer to
specification label for power requirements.
Note:
1 Dedicated external fused
disconnect (by others) must
be installed. Fusing must not
exceed max circuit protection
as indicated on the specification
label.
2 Ensure that adequate power is
available to carry full humidifier
amp draw as indicated on the
specification label.
3 Primary power on outdoor model
may be routed up through pipe
chase and conduit fittings or from
roof top source.
4 All wiring to be in accordance
with national and local electrical
codes.
Knockouts provided
in top and bottom panels.
Install strain relief (by others)
High voltage
terminal block
Disconnect
(by others)
Conduit
Fittings
SE Primary Power Wiring
Single Phase Supply
Ground
Ground
L1
Neutral
L1
Neutral
Dedicated circuit
breaker or fused
disconect.
E
X
T
I
N
T
SE Power and Disconnect
Model
Power (kW) Disconnect (A)
0.15
15
SE Indoor
SETC Outdoor 100
SETC Outdoor 175
0.65
SETC Outdoor 250
15
SETC Outdoor 375
SETC Outdoor 525
1.15
SETC Outdoor 750
SETC Outdoor 1050
1.65
20
High Voltage
Terminal Block
Pipe Chase
Figure 22: Primary Power Connections
Humidifier Installation Requirements | 40
Steam Distribution
The best way to add steam into a space is to add it in a supply air duct or an air handler.
Condair offers both single steam distributors as well as SAM-e steam distribution manifolds for
adding air to ducts and air handlers (see Figure 23).
If a duct or air handler is not present or if humidification is required for a specific area the
steam can also be added using remote blower packs. Fans built into the blower packs help
disperse the steam directly into the space being humidified.
See Condair publications 1503529 – SAM-e Engineering Manual and 2556592 - Steam
Distributor Installation for detailed information about Condair Steam Distribution Options.
The following pages provide a brief outline of steam line requirements for connecting the
Nortec SE humidifier to the selected steam distributor.
Steam Distributor
SAM-e Steam Distribution Manifold
Blower Packs in a Room
Figure 23: Methods of Steam Distribution
41 | Humidifier Installation Requirements
Steam Lines and Condensate Returns
Steam Line Length
The Nortec SETC/P humidifier should be mounted as close as possible to the duct steam
distributor. Longer lines will result in energy losses from steam condensation in lines and
may cause unwanted backpressure.
Material - The steam line between the cylinder steam outlet and the distributor may be Condair
steam hose, copper pipe, or stainless steel pipe or tube. Table 10 lists recommended materials
and sizes for based on humidifier capacity.
Length - The Nortec SETC/P is an atmospheric steam generator so it is very important no
restrictions are present in the steam line and that the steam line is sized properly to carry the
full output capacity of the humidifier. It is also important to minimize the length of steam lines.
Table 11: Maximum Recommended Length of Steam Line lists maximum recommended lengths
for steam lines.
Insulation and Slope - Whenever steam is distributed, condensate is formed in the distribution
system and steam distributor, manifold, or blower pack. Insulating steam lines is one important
way to reduce the amount of condensate formed. Steam lines must be sloped so that
condensate does not collect in the lines and create a restriction to steam flow.
Use Appropriate Slope
Insulate Pipe
10 Degrees
n
Direc tio
Steam
2 in.
(5 cm)
1 ft (30 cm)
2 Degrees
Steam
Dire
Ste
am D
irecction
tion
0.5 in.
(12 mm)
1ft (30 cm)
1 in. (2.5 cm) pipe
insulation
Figure 24: Main Steam Line Requirements
MAIN RULES FOR ATMOSPHERIC STEAM LINES





Slope the steam lines.
Trap condensate (Use full size ‘T’ for Traps).
Steam lines must not have any restrictions which could cause back pressure.
Insulate with 1.0 in. (2.5 cm) pipe insulation.
Follow recommended materials, size and length see tables.
Humidifier Installation Requirements | 42
Table 10: Recommended Steam Line Materials
Steam Line
Material
Copper Tube
*Stainless Steel
Tube
Condair Hose
Note:
Lb/hr (kg/hr)
Steam Line Length
ft
m
Steam Line Description
0-100 (0-45)
0-90
0-27
1 1/2 in. MED-L Tubing (1.625 in. OD)
101-250 (46-113)
0-180
0-54
3 in. MED-L Tubing (3.125 in. OD)
251-650 (114-295)
0-260
0-79
**4 in. MED-L Tubing (4.125 in. OD)
0-100 (0-45)
0-90
0-27
1.75 inch Tube x 0.065 inch thick wall
101-250 (46-113)
0-180
0-54
3 inch Tube x 0.065 inch thick wall
251-650 (114-295)
0-260
0-79
**4 inch Tube x 0.065 inch thick wall
31-100 (14-45)
<15
<4.5
Part Number 1328820 (1 3/4”)
*Stainless Steel tube is required when using RO/DI water.
**Condair offers adapters and reducers which can be used to convert from one size of steam line to another.
Condensate Returns


Route condensate back to humidifier fill cup if possible. Condensate will be returned
to cylinder from fill cup.
Condensate should not be routed to a sink used frequently by personnel. Route to a
floor drain or equivalent. Condensate normally cools in traps but is still hot. A SAMe
or larger steam line generates more condensate and water may not cool in the trap. A
drain water cooler option may be installed if required by code.
Figure 25: Condensate Traps
Tee is same size
as steam line
Use a full size tee, not a 90
degree elbow for vertical
to horizontal transitions.
12 in. (30 cm)
min drop to
top of ‘P’ Trap
P Trap min
8 in. (20 cm)
plus duct
static
pressure
‘P’ Traps Use:
- NORTEC 0.375 in condensate hose
- 1/4 in Med-L copper tubing, or
- 0.375 in stainless steel tubing
Condensate drains must be sloped down.
Route to humidifier fill cup if possible.
43 | Humidifier Installation Requirements
.
Table 11: Maximum Recommended Length of Steam Line
Unit
Size
Steam Output
.
lb/hr
(kg/hr)
Steam Outlet and
Line Size .
Copper
(SST)
50
100
175
250
375
525
750
1050
50
100
175
250
375
525
750
1050
1 1/2
1 1/2
3
3
4
4
2X 4
2X 4
(23)
(45)
(80)
(114)
(170)
(239)
(341)
(477)
(1 3/4)
(1 3/4)
(3)
(3)
(4)
(4)
(4)
(4)
Maximum
Length .
ft
(m)
37
90
90
180
180
220
260
260
Possible Loss
.
lb/hr/ft (kg/hr/m)
(11)
(27)
(27)
(55)
(55)
(67)
(79)
(79)
0.11
0.11
0.16
0.16
0.22
0.22
0.44
0.44
(0.16)
(0.16)
(0.24)
(0.24)
(0.33)
(0.33)
(0.66)
0.66)
Possible Loss at
Max. length
lb/hr (kg/hr)
4
10
14
28
39
48
114
114
(2)
(4.5)
(6.5)
(13)
(18)
(22)
(52)
(52)
Table 12: Equivalent Length of Some Common Fittings
Tube
Diameter in.
1 1/2 or 1 3/4
3
4
90 Degree
Elbow ft (m)
3.5
5
8
(1)
(1.5)
(2.4)
45 Degree
Elbow ft (m)
1.75
2.5
4
(0.5)
(0.75)
(1.2)
Side Outlet Tee
ft (m)
7
11
15
Gate Valve
ft (m)
(2.1)
(3.3)
(4.5)
0.8
1.1
1.6
(2.4)
(3.1)
(0.5)
Globe Valve
ft (m)
34
54
80
(10)
(16)
(24)
Steam Line Routing Nortec SE Indoor
Figure 26:Steam Distributor Above Humidifier (Copper Steam Line) shows a typical steam line
routing between an Nortec SE humidifier and a SAM-e manifold. Additional specific examples
are given in Condair publication 2552940 - Nortec SE Series Installation and Operation Manual.
Hose cuff
with clamps
Insulated copper
steam line. Support
so weight is not on
steam outlet.
1 ft (30 cm)
2 in. (5 cm)
min.
Condensate line
1 ft (30 cm)
min. before
anybend
‘P’ Trap
To drain
Use steam hose between
steam outlet and steam line.
Figure 26:Steam Distributor Above Humidifier (Copper Steam Line)
Humidifier Installation Requirements | 44
Steam Line Routing Nortec SE Outdoor


The Steam outlet(s) of the Nortec SETC Outdoor is from the back of the humidifier and
unlike the indoor model does not require 12 in. (30 cm) of vertical steam run immediately
after the humidifier. The steam line may be routed directly down or horizontally from the
outlet. See Figure 27: Nortec SETC Outdoor Steam Outlet.
The Nortec SETC Outdoor steam line must be insulated in all cases even for very short runs.
Insulate up to cabinet,
Insulation shown for cut back
to show steam connection only.
Connect to steam outlet
with hose cuff
1 ft (30 cm)
2 in. (5 cm)
min.
Run steam line down
through roof or across
to rooftop air handler.
Figure 27: Nortec SETC Outdoor Steam Outlet
45 | Humidifier Installation Requirements
Nortec SETC/P Controls
Controls are available from Condair as accessories or can be supplied by others. The following
information is relevant to all controls, factory supplied or otherwise.

The Nortec SETC humidifier can be operated with one or two modulating demand inputs or
one or two transducer inputs.
 The Nortec SEP has one modulating demand input which can be used for a duct high limit or
humidity control.
 Both the Nortec SETC and Nortec SEP can be operated as On/Off.
 The Nortec SETC humidifier control type can be configured via its LCD and keypad.
 The Nortec SEP humidifier control type can be configured via jumpers on its control board.
 Both the Nortec SETC and the Nortec SEP include a 24 VAC safety input which must be
made in order for the humidifiers to operate.
The Nortec SE humidifier can be configured to operate with the following control configurations.
Table 13: Humidifier Control Configurations
Configurations
Dual
Channel
Single
Channel
On/Off
SETC
SEP
Modulating Demand
Modulating High Limit
On/Off Safety
0-5, 1-5, 0-10, 2-10, 016, 3.2-16 VDC
0-20, 4-20 mA
N/A
Transducer Control
Transducer high limit
On/Off Safety
0-5*, 1-5, 0-10*, 2-10,
0*-16, 3.2-16 VDC
0-20*, 4-20 mA
N/A
Modulating Demand
On/Off High Limit **
On/Off Safety**
0-5*, 1-5, 0-10*, 2-10,
0*-16, 3.2-16 VDC
0-20*, 4-20 mA
0-10, 2-10 VDC
0-20, 4-20 mA
On/Off **
Modulating High Limit
On/Off Safety**
0-5, 1-5, 0-10, 2-10, 016, 3.2-16 VDC
0-20, 4-20 mA
0-10, 2-10 VDC
0-20, 4-20 mA
Transducer Control
On/Off High Limit **
On/Off Safety**
0-5, 1-5, 0-10, 2-10, 016, 3.2-16 VDC
0-20, 4-20 mA
N/A
On/Off **
Transducer High Limit
On/Off Safety**
0-5, 1-5, 0-10, 2-10, 016, 3.2-16 VDC
0-20, 4-20 mA
N/A
On/Off Control**
On/Off High Limit**
On/Off Safety**
24 VAC Dry Point
24 VAC Dry Point
* Transducer controls which have a possible 0 input are not recommended.
** All On/Off controls must be wired in series and connected to terminal 2 of the control terminal strip.
Note: Regardless of selecting on/off or modulating control method, Condair
humidifiers must have a closed circuit across their on/off security loop control
terminal to operate. Condair highly recommends the use of a high limit humidistat and
an air proving switch in series for this function.
Humidifier Installation Requirements | 46
Controls
Nortec provides optional On/Off controls, modulating humidistats, or humidity transducers as
shown in Figure 28, Figure 29, and Figure 30. Controls are available either wall mounted with
integrated sensor, wall mounted with a remote sensor, or duct mounted with integral sensor.
On/Off Controls
On/Off controls are used in all Condair humidifier security loops. The digital humidistat can also
be used as a space humidity controller, duct humidity controller, or duct high limit. These
controls include:




Air Proving Switch – duct mounted, pressure differential switch, adjustable set point from
0.07 IWC to 12.0 IWC, good for positive, negative or differential pressure applications, stops
humidifier if duct air pressure is not sensed. Turns humidifier off if air handler fails.
Duct Mounted Digital Humidistat – control or high limit, adjustable set point from 15-90% rh
with accuracy fixed at ±3% at 25°C, operating range of 0-95% rh, closes on humidity drop
for control and opens on rise for high limit duct application.
Wall Mounted Digital Humidistat – control or high limit, adjustable set point from 15-90% rh
with accuracy fixed at ±3% at 25°C, operating range of 0-95% rh, closes on humidity drop
for control and opens on rise for high limit application.
On/Off Controls Supplied by Others – Can be used as long as they have a dry set of contacts
capable of passing a 24-VAC, 2-A maximum signal.
2548731 - On/Off Wall Humidistat
2548732 - On/Off Duct Humidistat 1329203 - Air Proving Switch .
Figure 28: Nortec On/Off Controls
Modulating Humidistats
Modulating Controls are used to send a modulating demand signal to the Condair humidifier.
Different models can accept different signals (see Table 13: Humidifier Control Configurations)
Condair supplied controllers send a 0-10 VDC demand signal. This signal can be used as a
control and in some models can also be used as a modulating high limit. These controls include:


Wall Mounted Digital Humidistat with Integrated Sensor – control or high limit, adjustable
set point from 15-90% RH with accuracy fixed at ±3% at 25°C, outputs a 0-10 VDC signal.
Wall Mounted Digital Humidistat Without Sensor – control or high limit, adjustable set point
from 15-90% RH with accuracy fixed at ±3% at 25°C, outputs a 0-10 VDC signal. Requires a
remote transducer sensor supplying a 2-10 VDC signal.
47 | Humidifier Installation Requirements

Duct Mounted Digital Humidistat With Sensor – This package comes with both a remote
sensor and a wall mounted controller without sensor. Control or high limit, adjustable set
point from 15-90% rh with accuracy fixed at ±3% at 25°C, outputs a 0-10 VDC signal.
1510142 - Digital Wall Humidistat
2520261 - Digital Wall W/O Sensor
1509858 - Wall Sensor
2520266 - Digital Duct Humidistat Package .
Figure 29: Nortec Modulating Humidistats
Humidity Transducers
Transducer Sensors are signals sent back to either a controller or back to the humidifier. The
Nortec SETC (not the Nortec SEP) can accept a direct transducer signal. The sensors include:



Wall Mounted Humidity Transducer – Sensor, output of 2-10 VDC, range of 0 to 95% rh.
Duct Mounted Humidity Transducer – Sensor, output of 2-10 VDC, range of 0 to 95% rh.
Transducer Sensor By Others – Humidity sensors that rise linearly with the sensed rh in the
room.
1509858 - 2-10V Wall Humidity Transducer
1509857 - 2-10V Duct Humidity Transducer .
Figure 30: Condair Humidity Transducers
Humidifier Installation Requirements | 48
Outdoor Temperature Reset
The outdoor temperature sensor is used to prevent condensation on windows or other surfaces
that are adjacent to outdoor air. This sensor can be used in conjunction with the Condair digital
on/off and modulating controllers. The sensor allows the controller to override the set point to
prevent the humidifier from humidifying when condensation could be possible (see Figure 31).
Install the temperature sensor near the fresh air intake.
Figure 31: Outdoor Temperature Reset
2520263 - Outdoor Temperature Sensor .
Figure 32: Outdoor Temperature Sensor
Control Acceptance Configured at Factory
Condair offers factory configuration of controls to match those that will be used at site. Factory
configuration eliminates the need to configure the Nortec SETC/P in the field and makes it plug
and play with respect to software configuration
Table 14: Factory Configured Control Acceptance Part Numbers
Signal
0-5 VDC
0-20mA
4-20 mA
0-10 VDC
0-16 VDC
1-5 VDC
2-10 VDC
0-20 VDC
Demand Acceptance
Transducer Acceptance
Single Channel
Dual Channel
Single Channel
Dual Channel
2523060
2523062
2523064
2523066
2523090
2523092
2523094
2523096
2523061
2523063
2523065
2523089
2523091
2523093
2523095
2523097
2523100
2523102
2523105
2523110
2523112
2523114
2523116
2523118
2523101
2523104
2523107
2523111
2523113
2523115
2523117
2523119
49 | Humidifier Installation Requirements
Control Location
The humidity controls, whether controller or transducer, must be installed in a location which
best represents the space that is being humidified. The preferred location for the humidity
control is in the return air duct.
The high limit duct sensor must be installed downstream of the steam distributor but far enough
downstream that steam is fully absorbed. Installing the sensor to close can result both in the
humidifier short cycling and in damage to the sensor from saturation.
10 ft min.
1
Air
Proving
Switch
3
2
Humidity
Control
(return air
duct or
in room)
Duct High
Limit
Figure 33: Control Location
1

2



Air Proving Switch
Locate so that it can sense air flow or lack of it.
Duct High Limit
Nortec SETC can be modulating, On/Off, or a humidity transducer.
Nortec SEP can be modulating or On/Off.
Locate at least 10 feet from steam distributor or far enough that under normal conditions
steam is fully absorbed.
3 Humidity Control
 Nortec SETC can be modulating, On/Off, or a humidity transducer.
 Nortec SEP can be modulating or On/Off.
 Can be located either in return air duct (preferred) or in room being humidified.
 Mount in area representative of room humidity (draft, doorways, sunlight, or overhang such
as a shelf can affect reading).
 Avoid placing near discharge diffuser of humidified air.
Humidifier Installation Requirements | 50
Control wiring
The Nortec SE humidifier control terminal strip is shown in Figure 34 along with a brief
description of each of the inputs/outputs. The figure also shows the Nortec SETC remote relay
board. For wiring use minimum of 18 AWG and keep as short as possible.
Humidifier Control Terminal Strip
24 VAC power output for safety loop and On/Off controls 1
On/Off input - safety loop and On/Off controls 2
Ground reference for control signals 3
Channel 1 input - demand (or transducer on SETC) 4
Channel 2 input - demand or transducer (SETC only) 5
5 VDC reference voltage 6
Ground 7
An input of 24 VAC will trigger a blowdown. (SETC only) 8
Ground for Actuator control signal 9
Actuator power - 24 VAC power for CV valve actuator 10
Ground for CV valve actuator 11
0-10 VDC output signal CV valve actuator based on demand 12
1- 24 VAC
2 - On/Off Loop
3 - Ground
4 - Control Signal
5 - Limit Signal
6 - 5 VDC
7 - Ground
8 - Full Tank Blow Down
9 - Ground
10 - Actuator power
11 - Actuator power
12 - 0-10 VDC Out
E
X
T
S
E
Remote Relay Board
(SETC Only)
NO
COM
NO
COM
NC
NO
COM
NC
NO
COM
Figure 34: Nortec SE Humidifier Control Terminal Strip
51 | Humidifier Installation Requirements
Unit ON
Steam
Service
Error
Staged Modulation (Nortec SETC Only)
Staged Modulation allows connection of up to 10 humidifiers (equivalent of 10,000 lb/hr) to
one control signal. Each unit connected in a staged system is configured to operate within a
fixed range of the total system demand. Example, a slave unit configured to operate between
20 and 30% demand will output 0% when total system demand is less than 20% and 100%
when demand is 30% or greater.



Humidifier’s must be wired together with 18-24 AWG multi-strand, twisted pair, shielded
cable.
Humidistats/transducers and On/Off safety loop are connected to master unit only.
Configuration of Staged Modulation is carried out via the Nortec SETC’s LCD and keypad.
Figure 35: Staged Modulation Wiring
Humidifier Installation Requirements | 52
Condair Online (Optional Nortec SETC Only)
Condair ONLINE is an option that can be integrated with the Nortec SETC. It allows a user to
monitor their unit from any computer with an Internet connection by logging in to
www.condaironline.com. It can also be configured to send service reminders and fault warnings
when they occur.
See Condair publication 1509311 – Online GSTC/SETC Installation and Operation Manual for
detailed information about Nortec Online.
Figure 36: Nortec SE Humidifier Online Status Screen
Links 2 (Optional Nortec SETC Only)
LINKS 2 is an option that can be integrated with the Nortec SETC. It allows a Building
Management System to monitor and / or control the humidifier.
See Condair publication 2531037 – Links 2 GSTC/SETC Installaion and Operation Manual for
detailed information about LINKS 2 and its operation and configuration.
Table 15: Links 2 Recommended Wire Types and Lengths
Protocol
BACnet /MSTP
Johnson N2
BACnet /IP
Lonworks
Signal Type
Polarity
Recmended Cable
Max. Recommended Distance
from Nortec Module
A
B
EIA-485,
2-wire
Net +
Net -
18-24 AWG
Shielded, Twisted
Pair
2000 ft at 9,600 bps
2000 ft at 38,400 kbps
LAN Standard
N/A
N/A
CAT. 5E cable with
RJ-45 termination
Depends on cable
manufacturer
EIA-232,
2-wire
Tx
Rx
18-24 AWG
Twisted Pair
Should not exceed 50 ft
53 | Humidifier Installation Requirements
Figure 37: Sample Network with Links 2
Humidifier Installation Requirements | 54
55 | Warranty
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 (with the exception of the cylinder), are free from defects in
material and workmanship. No warranty is made against corrosion, deterioration, or suitability
of substituted materials used as a result of compliance with government regulations.
THE COMPANY’s obligations and liabilities under this warranty are limited to furnishing
replacement parts to the customer, F.O.B. THE COMPANY’s factory, providing the defective
part(s) is returned freight prepaid by the customer. Parts used for repairs are warranted for the
balance of the term of the warranty on the original humidifier or 90 days, whichever is longer.
The warranties set forth herein are in lieu of all other warranties expressed or implied by law. No
liability whatsoever shall be attached to THE COMPANY until said products have been paid for in
full and then said liability shall be limited to the original purchase price for the product. Any
further warranty must be in writing, signed by an officer of THE COMPANY.
THE COMPANY’s limited warranty on accessories, not of the companies manufacture, such as
controls, humidistats, pumps, etc. is limited to the warranty of the original equipment
manufacturer from date of original shipment of humidifier.
THE COMPANY makes no warranty and assumes no liability unless the equipment is installed in
strict accordance with a copy of the catalog and installation manual in effect at the date of
purchase and by a contractor approved by THE COMPANY to install such equipment.
THE COMPANY makes no warranty and assumes no liability whatsoever for consequential
damage or damage resulting directly from misapplication, incorrect sizing or lack of proper
maintenance of the equipment.
THE COMPANY makes no warranty and assumes no liability whatsoever for damage resulting
from freezing of the humidifier, supply lines, drain lines, or steam distribution systems.
THE COMPANY makes no warranty and assumes no liability whatsoever for equipment that has
failed due to ambient conditions when installed in locations having climates below 14°F (10°C) during January or above 104°F (40°C) during July.
THE COMPANY retains the right to change the design, specification and performance criteria of
its products without notice or obligation.
Warranty | 56
U.S.A.
Condair Inc.
826 Proctor Avenue
Ogdensburg, NY 13669
CANADA
Condair Ltd.
2740 Fenton Road
Ottawa, Ontario K1T 3T7
TEL: 1.866.667.8321
FAX: 613.822.7964
EMAIL: [email protected]
WEBSITE: www.condair.com
Certificate No. 002419
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