Nortec SE User Manual
SE
Important: Read and save these instructions. This guide to be left with equipment.
Series
Installation and
Operation Manual
Includes installation, operation,
maintenance, and troubleshooting
information for your indoor SETC B+
and SEP steam exchange humidifier
2552940-B | 28 APR 2011
Thank you for choosing Nortec.
INSTALLATION DATE (MM/DD/YYYY)
MODEL #
SERIAL #
Proprietary Notice
This document and the information disclosed herein are proprietary data of NORTEC HUMIDITY LTD. Neither
this document nor the information contained herein shall be reproduced used, or disclosed to others without
the written authorization of NORTEC HUMIDITY LTD., except to the extent required for installation or
maintenance of recipient’s equipment. All references to the Nortec name should be taken as referring to
NORTEC HUMIDITY LTD.
Liability Notice
Nortec does not accept any liability for installations of humidity equipment installed by unqualified personnel or
the use of parts/components/equipment that are not authorized or approved by Nortec.
Copyright Notice
Copyright 2010, NORTEC HUMIDITY LTD. All rights reserved.
Contents
1 Introduction
2 Receiving and Unpacking
3 Humidifier Components
5 SETC/P Models
6 Options and Accessories
9 Installation
10 Typical Humidifier Installation
11 Location
12 Mounting
14 Plumbing
15 Boiler Steam and Boiler
Condensate Return
17 Steam Lines and Condensate
Returns
43 Operation
44 SETC LED Status Lights
44 SEP LED Status Lights
45 How the Humidifier Works
49 SETC Humidifier Configuration
60 SEP Humidifier Configuration
63 Maintenance and
Servicing
64 Required Maintenance
65 Maintenance Schedule
69 Maintenance Shutdown and
Extended Shutdown
70 Maintenance Checklist
71 Troubleshooting
22 Electrical
23 External Controls
32 Options and Accessories
33 Start Up
34 Installation Check
35 SETC User Interface
36 Start Up Procedure
37 Status Screens
39 Nortec Digital Controls
41 Start Up Checklists
73 General Troubleshooting
76 SETC Warnings and Faults
82 SEP Faults
83 Wiring Diagrams
85 Spare Parts
96 Warranty
CAUTION: Servicing
Disconnect main power before any servicing.
Shut off pressurized steam supply and ensure steam pressure is safely relieved
before any servicing of pressurized steam components.
The electrical compartment contains high voltage components and wiring. Access
should be limited to authorized personnel only.
During and following operation of the humidifier, the steam and components in
contact with the steam such as the tank, blower pack, steam lines, steam
distributors, and condensate lines can become hot and can burn if touched.
Walter Meier does not accept any liability for installations of humidity equipment
installed by unqualified personnel or the use of parts/components/equipment
that are not authorized or approved by Walter Meier.
CAUTION: Electrical
All electrical work should be done according to local electrical code.
Electrical connection to be performed by a licensed electrician.
CAUTION: Plumbing / Steam Lines
Plumbing to be performed by a licensed plumber.
Pressurized steam line installation to be performed by a qualified installer.
Drain water from humidifier can be very hot. Do not drain to public sink.
All plumbing and pressurized steam supply line work should be done according to
local plumbing code.
CAUTION: Installation
Do not mount on hot surfaces
Do not mount in area where freezing can occur
Do not mount on vibrating surface
The SETC/P produces steam at atmospheric pressure no devices which could
block steam output should be connected to the steam outlet.
Steam output lines must be installed so that no restriction can produce
backpressure in the humidifier.
Regardless of selecting On/Off or modulating control method, Nortec humidifiers
must have a closed circuit across its On/Off security loop control terminal to
operate. Nortec highly recommends the use of a high limit humidistat and an air
proving switch in series for this function.
Unit damage caused by water quality outside of the specified ranges is not
covered under warranty.
Introduction
1 | Introduction
Note: A steam valve, actuator, and wye strainer are shipped along with the SETC/P
humidifier but in separate small boxes.
Receiving and Unpacking
1 Check packing slip to ensure ALL material has been delivered.
2 All material shortages are to be reported to Nortec within 48 hours from receipt of goods.
Nortec assumes no responsibility for any material shortages beyond this period.
3 Inspect shipment for damage and note damages on shipping waybill accordingly.
4 After unpacking, inspect equipment for damage and if damage is found, notify the shipper
promptly.
5 All Nortec products are shipped on an FOB factory basis. Any and all damage, breakage or
loss claims are to be made directly to the shipping company.
Before Installation
1 Ensure that available voltage and phase corresponds with humidifier voltage and phase as
indicated on humidifier’s specification label.
2 If steam supply is from a Medium or High Pressure boiler ensure supply steam line includes
a relief valve to prevent supply pressure from exceeding 15 psig.
3 Ensure means for returning boiler steam condensate to boiler at atmospheric pressure are
available.
4 Ensure sufficient clearances will be available as described in Location on page 11.
5 Ensure steam lines can be routed to distributor SAM-e manifold or blower pack as described
in Steam Lines and Condensate Returns on page 17.
6 Report any discrepancy immediately to the site engineer.
Figure 1: Specification Label Location
Introduction | 2
Display and Keypad
Float Chamber
Control Terminal Strip
Remote Relay
Board
Driver Board
High Voltage
Terminal Block
Transformer
Base
Clean Out
Port
Tank
Total Controller
Steam Outlet
Fill Box
Vacuum Break
Steam Inlet
(Boiler Steam)
P Trap
Fill Valve
Drain Outlet
Condensate Drain
(Boiler Steam)
Auxiliary Drain
Outlet
Drain Pump
Mixing Box
Steam Trap
Heat
Exchangers
(Faceplate)
On/Off Switch
Heat
Exchanger
Gasket
Actuator
Wye Strainer
CV Valve
Manual Drain Switch
Humidifier Components
3 | Introduction
Figure 2: SETC 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.
Description of Components
Table 1: Humidifier Components
Introduction | 4
SETC50
SE 100-175
SE 250-375
SE 525-750
SE 1050
Note:
SE 750 has
2 steam outlets
SETC/P Models
The SETC with its Total Controller and state-of-the-art features and options is the most
advanced steam exchange humidifier available. The base model SEP provides steady and
reliable humidification using the same proven heat exchanger technology as the SETC. The
SETC/P is available in capacities ranging from 50 lb/hr (23 kg/hr) to 1050 lb/hr (475 kg/hr).
SETC/P humidifiers are packaged in five different cabinets depending on their capacity. Figure
3: SETC/P Modelsshows the configuration and relative size of the five different cabinets. Table
3 provides specifications for the SETC/P product line.
Figure 3: SETC/P Models
The SE 50, 100, 175, 250, and 375 all have a single heat exchanger. The SE 525 and 750
have two heat exchangers. The SE 1050 has three heat exchangers. All models have a single
pressurized steam inlet and condensate drain with internal manifold connecting separate heat
exchangers if they are present.
5 | Introduction
Option / Accessory
Used For
Freeze Protection Package (SETC Only)
Emptying the tank in case of fault or power failure to prevent
freezing. (Factory installed)
Floor Stand
Supporting the humidifier 27 inches above the floor (height can be
reduced by cutting legs of floor stand). (field assembled)
Ceiling Mounting Kit (SE50 Only)
Providing a drain pan and support brackets for mounting an SE50
unit from the ceiling.
Steam Distributors
Adding steam into air ducts
Remote Blower Pack
Adding steam into a space remote from the humidifier.
SAM-e Steam Distribution Manifold
Adding steam into air ducts where short absorption is required.
Digital or Analog Control Humidistats
Controlling the output of the humidifier based on sensed RH (can
be mounted in the space being humidified or in the duct).
Digital RH Transducers
Communicating RH in a space or duct to the humidifier
Digital or Analog High Limit Humidistats
Preventing over humidification in a duct by shutting down or
throttling down the humidifier when duct RH gets high.
Air Proving Switches
Insuring humidification only occurs when air is moving in a duct.
Nortec LINKS 2 (SETC Only)
Connecting the humidifier to a building management interface.
hardware allows control of the humidifier via BACnet, Lonworks,
Johnson N2, or Modbus.
Nortec OnLine (SETC Only)
User and factory monitoring and configuration of the humidifier via
the internet.
Outdoor Model (SETC Only)
The outdoor model of the SETC provides a weatherproof enclosure that allows the SETC to be
installed on rooftops in moderately cool climates. Refer to the SETC installation manual that is
provided with the outdoor model to insure proper installation.
Options and Accessories
Nortec provides a complete line of options and accessories for every humidification application.
The following options and accessories are available and may have been delivered with your
SETC/P humidifier. Refer to the installation instructions that came with the accessories for their
proper installation and operation.
Table 2: Options and Accessories
Introduction | 6
Model
SETC
Part No
SEP
Part No.
CV
Valve
CV Valve,
Steam
Inlet, Wye
Port (NPT)
Cond-
ensate
Port
(NPT)
Net/Full
Weight
lb (kg)
Required
fill line
flow
gal (l)
/min
Required
Drain
capacity
gal (l)
/min
Electrical
50
2552765
2520383
2.8
1/2
3/4
125/180
(57/82)
2.6 (10)
5.2 (20)
Voltage
110-120
Phase
1
Amps
1.25 A
Power
0.15 KW
Max
Disconnect
15 A
100
2550073
2525132
5.5
3/4
3/4
267/423
(121/192)
175
2550074
2525133
10 1 3/4
250
2550075
2525134
12 1 3/4
355/599
(161/272)
375
2550076
2525135
20
1 1/4
3/4
525
2550077
2553312
28
1 1/2
1
529/992
(240/450)
750
2550078
2553313
40 2 1
4.5 (17)
8 (29)
1050
2550080
2525139
65
2 1/2
1 1/4
703/1384
(318/628)
Model
*Supply
Steam
Pressure
(psig)
*Max Output
lb/hr (kg/hr)
Approximate
Boiler Steam
Consumption
lb/hr (kg/hr)
**Water
Consumption
gal (l) /hr
**Drain Volume
gal (l) /hr
50
5
13
(6)
15
(7)
2.3
(9)
0.8
(3)
10
32
(14)
36
(16)
5.7
(21)
1.9
(7)
15
50
(23)
58
(26)
9.0
(34)
3.0
(11)
100
5
26
(12)
30
(14)
4.7
(18)
1.6
(6)
10
63
(29)
72
(33)
11.3
(43)
3.8
(14)
15
100
(45)
115
(52)
18.0
(68)
6.0
(23)
175
5
46
(21)
52
(24)
8.2
(31)
2.7
(10)
10
110
(50)
127
(58)
19.8
(75)
6.6
(25)
15
175
(80)
201
(91)
31.5
(119)
10.5
(40)
250
5
65
(30)
75
(34)
11.7
(44)
3.9
(15)
10
158
(72)
181
(82)
28.3
(107)
9.4
(36)
15
250
(114)
288
(131)
44.9
(170)
15.0
(57)
375
5
98
(44)
112
(51)
17.5
(66)
5.8
(22)
10
236
(107)
272
(123)
42.5
(161)
14.2
(54)
15
375
(170)
431
(196)
67.4
(255)
22.5
(85)
525
5
137
(62)
157
(71)
24.5
(93)
8.2
(31)
10
331
(150)
380
(173)
59.5
(225)
19.8
(75)
15
525
(239)
604
(274)
94.4
(357)
31.5
(119)
750
5
195
(89)
224
(102)
35.1
(133)
11.7
(44)
10
473
(215)
543
(247)
84.9
(321)
28.3
(107)
15
750
(341)
863
(392)
134.8
(510)
44.9
(170)
1050
5
273
(124)
314
(143)
49.1
(186)
16.4
(62)
10
662
(301)
761
(346)
118.9
(450)
39.6
(150)
15
1050
(477)
1208
(549)
188.7
(714)
62.9
(238)
Table 3: SETC/P Specifications
Table 4: SETC/P Capacities and Water Consumption
7 | Introduction
* 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.
A
13.8 in.
35.1 cm
8.0 in.
20.3 cm
31.6 in.
80.3 cm
39.5 in.
100.2 cm
4.0 in.
10.2 cm
9.7 in.
24.6 cm
B
C
21.0 in.
53.3 cm
40.2 in.
102.1 cm
3.7 in.
9.5 cm
7.4 in.
18.9 cm
10.3 in.
26.2 cm
1.0 in.
2.5 cm
6.8 in.
17.2 cm
1.0 in.
2.5 cm
Steam Outlet (D)
SETC 750 & 1050
SETC 100 - 525
(E) Pressure Steam Inlet
(SE 1050 Only)
(E) Pressure Steam Inlet
Water Inlet 1/2 in. NPT
Drain 3/4 in. (19mm) Tube
(F) Steam
Condensate
Outlet
Aux. Drain
1/2 in. NPT
44.5 in.
113 cm
4.1 in.
10.3 cm
1.5 in.
3.8 cm
1.8 in.
4.6 cm
12.8 in.
32.6 cm
14.5 in.
36.8 cm
O
.5 in.
1.3 cm
mounting holes
4 places
2.3 in.
5.7 cm
1.4 in.
3.7 cm
25.6 in.
65 cm
20.2 in.
51.3 cm
1.6 in.
4 cm
2.7 in.
6.9 cm
8.0 in.
20.3 cm
10.3 in.
26.1 cm
16.8 in.
42.5 cm
19.6 in.
49.7 cm
Aux. Drain 1/2
Female NPT
Steam Condensate
Outlet 3/4 Male NPT
Pressure Steam
Inlet 1/2 Male NPT
Drain 3/4 in.
(19 mm) Tube
Steam Outlet
1.75 in. (44 mm)
Water Inlet 1/2
in. Male NPT
8.3 in.
21 cm
4.6 in.
11.6 cm
1.0 in.
2.6 cm
1.1 in.
2.8 cm
1.3 in.
3.2 cm
2.6 in.
6.5 cm
5.5 in.
13.9 cm
5.5 in.
13.9 cm
10.0 in.
25.4 cm
5.3 in.
13.4 cm
2.0 in.
5.1 cm
1.9 in.
4.7 cm
2.5 in.
6.3 cm
SE 50
Model
A in. (cm)
B in. (cm)
C in. (cm)
D in. (mm)
E NPT
F NPT
100
1 3/4 (44)
3/4
3/4
175
20.8 (53)
N/A
16.1 (40.8)
3 (76)
1
3/4
250
3 (76)
1
3/4
375
27.2 (69)
N/A
22.4 (56.8)
4 (102)
1 1/4
3/4
525
4 (102)
1 1/2
1
750
42.7 (108.6)
21.9 (55.5)
38.0 (96.4)
2 X 4 (102)
2
1
1050
58.3 (148.2)
29.7 (75.3)
53.6 (136.1)
2 X 4 (102)
2 1/2
1 1/4
Figure 4: SE Dimensions
Introduction | 8
Installation
10 Typical Humidifier Installation
11 Location
12 Mounting on Optional Stand
13 Ceiling Mounting (SE50 Only)
14 Plumbing
15 Boiler Steam and Boiler Condensate
Return
17 Steam Lines and Condensate Returns
22 Electrical
23 External Controls
23 Control Wiring
23 Control Location
24 On/Off Control Wiring
25 Modulating Control Wiring
27 Transducer Control Wiring
28 Optional Outdoor Temperature Reset
29 CV Valve Actuator Wiring
30 Remote Relay Board Wiring
31 Staged Modulation Wiring (SETC Only)
32 Options and Accessories
32 Remote Blower Pack
9 | Installation
Air gap
Pressurized
steam supply
Water supply
30-80 psig
Tank drain
Condensate
return to boiler
1- 24 VAC
2- On/Off Loop
3- Ctrl Ground
4- Control Signal
5- Limit Signal
6- 5 VDC
7- Ground
8-
9-
Tank Blow Down
Ground
10- Actuator
11- Actuator
12- 0-10 VDC Out
On/Off
Controls
Modulation
Controls
E
X
T
S
E
T
C
/
P
L1
N
Ground
Dedicated
Circuit Breaker
or Disconnect
SETC/P
EXT
2 in.
(5 cm)
min.
1ft (30 cm)
1 ft (30 cm)
min.
Location
Mounting
Pg 11
Steam
Distribution
Pg 17
Controls
Pg 23
Plumbing
Pg 14
Boiler
Steam
Pg 15
Electrical
Pg 22
30 in.
(76 cm)
Min.
Side
Clearance
30 in.
(76 cm)
Min.
Front
Clearance
36 in. (91 cm)
Min. Top Clearance
(0 in SE 50)
30 in.
(76 cm)
Min.
SE 1050
SAM-e Distribution Manifold
Typical Humidifier Installation
Figure 5: Typical Humidifier Installation
Installation | 10
Note:. Condensate drain line must be sloped downward to boiler condensate return.
Use pump (by others) or stand (optional) if necessary.
30 in.
(76 cm)
Min. Side
Clearance
30 in.
(76 cm)
Min. Front
Clearance
Mount
HumidifierLevel
As Close as
Possible to Steam
Distributor
5-95%
36 in. (91 cm) Min.
Top Clearance
(0 in. for SE50 only)
30 in.
(76 cm)
Min.
SE 1050
only
Condensate drain
line must be
sloped down, do
not use to lift
condensate
Location
The SE series humidifiers are designed to be either floor mounted or stand mounted (stand
optional). SE 50 models can also be ceiling mounted with the optional ceiling installation kit,
part number 2520345.
Install only in areas with ambient temperature 41-104 °F (5 – 40 °C) relative humidity 5 -
95% (non condensing).
Ensure mounting surface is strong enough to support the full weight of the humidifier and
accessories (see Table 3: SETC/P Specifications).
Install in location where electrical power, boiler steam, and drain can be connected to the
humidifier.
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.
Condensate drain is located close to the bottom of the humidifier. Locate the unit so that
condensate line slopes down to boiler or use pump (by others) to lift to boiler. Use stand if
necessary.
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. Nortec does not accept responsibility for installation code violations.
Figure 6: Installation Location / Clearance
11 | Installation
Note: The humidifier must be secured to the stand (hardware provided) and the stand
must be secured to the floor (hardware by others).
Center support only
present on SE 525
and larger.
Fasten SE humidifier
to stand with bolts,
lock washers, and nuts
provided. Tighten
to 200 in-lb (22.6 Nm).
Mount stand on level surface
Ensure humidifier is Level
Secure stand to floor
four places.
(hardware by others)
Note:
Mounting on Optional Stand
The optional SE floor stand positions the SE humidifier at a convenient working height and
provides additional clearances for sloping drains. The stand must be assembled at site.
Assemble the stand according to the instructions that are provided with it.
Ensure the stand and humidifier are installed on a level surface
Permanently secure the stand to the floor via the holes in the leg support plates following
any local codes or regulations.
Figure 7: Mounting on Optional Stand
Installation | 12
Note:. The 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.
1
4
.
5
i
n
.
(
3
6
.
8
c
m
)
12.8 in.
(32.6 cm)
Anchor 3/8 in (M10)
support rods to ceiling
(by others)
Support rods and hardware
(by others) must not extend
below support bracket flange.
Sloped drain
1/2 in. pipe
(by others)
Ceiling Mounting (SE50 Only)
Nortec offers an optional ceiling mounting kit (part number 2520345) which allows the SE50 to
be ceiling mounted with zero clearance to the ceiling. Follow the following guidelines for
Figure 8: Ceiling Mounting the SE50
installation.
Follow the instructions provided with the ceiling mounting kit.
Install in a location where regular maintenance can be performed. Provide clearance as
shown in Figure 6: Installation Location / Clearance.
The 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.
The humidifier cannot be used as a structural member. All piping connected to the unit
must be supported independently.
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.
13 | Installation
Note:
Drain Water is very hot, do not use plastic pipe for drain or condensate lines, do not
drain to public sink. Route to floor drain or equivalent.
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 Solvents (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)
Min. 1 1/4 in. OD drain line.
Slope down. Increase size
if combining multiple drains.
0.75 in. (19 mm). OD
un-threaded drain outlet
Connect with hose cuff
and hose clamps.
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.
Always install a water
shut-off valve.
1/2 in. NPT
Use union to connect
supply pipe to unit.
*Pipe, unions, and water shut-off valve not supplied by NORTEC.
Axillary drain, 1/2 in. female NPT
For draining tank without pump. Leave
valve closed except if freeze protection is installed.
Plumbing
All water supply and drain line connections must be installed in accordance with local
See Table 3 and Table 4 on page 7 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
Auxiliary drain connection with manual shut off valve is recommended for all units. Valve to
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
Figure 9: Water Supply and Drain Connection
plumbing codes.
installed as shown. See Table 3 and Table 4 on page 7 for flow requirements.
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.
warranty.
Installation | 14
Note:.
Pressurized steam line installation to be performed by a qualified installer.
Damage to SE heat exchanger will occur if it is exposed to pressure above 20 psi..
A safety relief valve must be installed to prevent the 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 SE output.
Condensate must be drained to a non-pressurized boiler condensate return line.
Pressurized condensate
header
Not pressurized
condensate header
(slope down)
F&T Trap
Pressure
gauge (optional)
Isolation Valve
Wye Strainer
CV Valve
(see table 3)
Condensate Drain
Port (see table 3)
Boiler steam
inlet port
(see table 3)
Boiler steam supply
line. Max 15 psi, Min 5 psi
measured at CV Valve
6 in.
(15 cm)
Max
Actuator
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.
Boiler steam
inlet port location
on SE 1050
S
l
o
p
e
d
o
w
n
o
n
l
y
Boiler Steam and Boiler Condensate Return
15 | Installation
Figure 10: SE Boiler Steam and Condensate Connection
Caution: Condensate leaves the steam traps inside the SE under slight pressure. Steam
flash could occur in the condensate drain line.
1/2 in. (1.2 cm)
min.
Install jam nut
and lock washer
Install stem
extension
Install and
tighten
mounting nut
2 turns then
push in and
1/8 turn to lock
Actuator
CV Valve
Raise valve
stem to full up
Insert
connecting
pin
Turn stem
extension
until holes
line up
Tighten jam nut
against stem extension
Nortec supplies a CV valve, actuator and wye strainer with each SE humidifier. The port sizes of
the CV valve, boiler steam inlet port, and condensate drain port are given in Table 3: SETC/P
Specifications on page 7. Follow the following guidelines for installation.
All steam line connections must be installed in accordance with local codes.
Install the CV valve actuator following the procedure in Figure 11: CV Valve Actuator
Installation after the CV valve is installed on the steam line. Wire the actuator as described
in CV Valve Actuator Wiring on page 29.
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 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 4: SETC/P
Capacities and Water Consumption on page 7 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 mananagement.
The boiler steam and condensate connections are independent. Boiler steam condensate
should be returned to the boiler and should not be mixed with water from the tank drain.
The steam supply pressure can be entered into the SETC control software to provide display
of unit output. See Pressure Based on page 56.
Figure 11: CV Valve Actuator Installation
Installation | 16
Steam Line
Material
Lb/hr (kg/hr)
Steam Line Length
ft m
Steam Line Description
Copper Tube
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)
*Stainless Steel
Tube
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
Nortec Hose
31-100 (14-45)**
<15
<4.5
***Part Number 1328820 (1 3/4”)
S
t
eam
Dire
ction
Ste
am
D
ire
c
tio
n
S
t
e
a
m
D
i
r
e
c
t
i
o
n
2 in.
(5 cm)
1 ft (30 cm)
1ft (30 cm)
0.5 in.
(12 mm)
10 Degrees
2 Degrees
Use Appropriate Slope Insulate Pipe
1 in. (2.5 cm) pipe
insulation
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.
Steam Hose Odour: Nortec hose may generate a slight odour during initial use. This
odour is temporary and will disappear after a short period of time.
Steam Lines and Condensate Returns
Figure 12: Main Steam Line Requirements
Table 5: Recommended Steam Line Material
Note: * Use only stainless steel tube for reverse osmosis and deionized water applications.
** Use 2 x 4 in. steam lines for steam capacities higher than 750 lb/hr (307 kg/hr)
*** Use one steam hose per 100 lb/hr (45 kg/hr) of output.
17 | Installation
Unit
Size
Steam Output
.
lb/hr (kg/hr)
Steam Outlet and
Line Size .
Copper (SST)
Maximum
Length .
ft (m)
Possible Loss
.
lb/hr/ft (kg/hr/m)
Possible Loss at
Max. length
lb/hr (kg/hr)
50
50
(23)
1 1/2
(1 3/4)
37
(11)
0.11
(0.16)
4
(2)
100
100
(45)
1 1/2
(1 3/4)
90
(27)
0.11
(0.16)
10
(4.5)
175
175
(80) 3 (3)
90
(27)
0.16
(0.24)
14
(6.5)
250
250
(114) 3 (3)
180
(55)
0.16
(0.24)
28
(13)
375
375
(170) 4 (4)
180
(55)
0.22
(0.33)
39
(18)
525
525
(239) 4 (4)
220
(67)
0.22
(0.33)
48
(22)
750
750
(341)
2X 4
(4)
260
(79)
0.44
(0.66)
114
(52)
1050
1050
(477)
2X 4
(4)
260
(79)
0.44
0.66)
114
(52)
Tube
Diameter in.
90 Degree
Elbow ft (m)
45 Degree
Elbow ft (m)
Side Outlet Tee
ft (m)
Gate Valve
ft (m)
Globe Valve
ft (m)
1 1/2 or 1 3/4
3.5
(1)
1.75
(0.5)
7
(2.1)
0.8
(2.4)
34
(10) 3 5
(1.5)
2.5
(0.75)
11
(3.3)
1.1
(3.1)
54
(16) 4 8
(2.4)
4
(1.2)
15
(4.5)
1.6
(0.5)
80
(24)
Note: 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 SAM-e 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.
12 in. (30 cm)
min drop to
top of ‘P’ Trap
P Trap
min 8 in.
(20 cm)
plus duct
static pressure
Tee is same size
as steam line
Use a full size tee, not a 90
degree elbow for vertical
to horizontal transitions.
‘P’ Traps Use:
- NORTEC 0.375 in condensate hose .
- 1/4 in Med-L copper tubing, or
- 0.375 in stainless steel tubing
Condensate drains must be sloped down.
Route to humidifier fill cup if possible.
Table 6: Maximum Recommended Length of Steam Line
NOTE: See Table 7 for equivalent length of common fittings.
Table 7: Equivalent Length of Some Common Fittings
Figure 13: Condensate Traps
Installation | 18
12 in.
(30 cm)
min.
Calculated absorption
distance to any obstruction
or 8-10 ft (2.4 - 3 m)
if unknown
Mount distributor
to side of duct
2 x duct
height min.
2/3 Duct
height
Note:
Refer to distributor or SAM-e installation manuals for detailed installation instructions.
Hose cuff
with clamps
2 in. (5 cm)
min.
1 ft (30 cm)
‘P’ Trap
1 ft (30 cm)
min. before
anybend
Condensate line
Use steam hose between
steam outlet and steam line.
Insulated copper
steam line. Support
so weight is not on
steam outlet.
To drain
Figure 14: Distributor Location in Duct
Figure 15: SAM-e/Steam Distributor Above Humidifier (Copper Steam Line Shown)
19 | Installation
‘P’ Trap
Install Condensate Tee
Before Distributor
1 ft (30 cm)
min. Before
any bend
Min 12 in.
(30 cm)
radius
Hose will soften
over time
proper support
Is necessary
Support Brackets
1 ft (30 cm)
min.‘P’ Trap
To drain
To drain
1ft (30 cm)
min. before
any bend
Obstruction
Use full size condensate tee
at low point. Slope lines up
to “T” and immediately after it.
1 ft (30 cm)
min.
1 ft (30 cm)
0.5 in. (1.2 cm) min.
To drain
To drain
‘P’ Trap
‘P’ Trap
Figure 16: Steam Distributor/SAM-e Below Humidifier (Hose Shown)
Figure 17: Steam Under Obstruction (Copper Steam Line Shown)
Installation | 20
1 ft (30 cm)
min before turn
Condensate
tee every
15-20 ft
(4.5 - 6 m)
Condensate
tee at low
points
Individually trap multiple condensate
returns before joining on common line.
To Drain
Install condensate tee
before distributor
Method for Longer Runs With Limited Vertical Space
1 ft (30 cm)
min.
Figure 18: Long Steam Run
21 | Installation
Caution:
Wiring to be performed by a licensed Electrician.
All SE humidifiers operate on 120 VAC, single phase, 60 HZ power. Refer to
specification label for power requirements.
L1
Neutral
Ground
L1
Neutral
Ground
SETC / P Primary Power
Single Phase Supply
Note:
1
2
3
Dedicated external fused
disconnect must be installed.
Fusing must not exceed max
circuit protection as indicated
on the specification label.
Ensure that adequate power is
available to carry full humidifier
amp draw as indicated on the
specification label.
All wiring to be in accordance
with national and local electrical
codes.
E
X
T
I
N
T
High voltage
terminal block
Knockouts provided
in top and bottom panels.
Install strain relief (by others)
Dedicated circuit
breaker or fused
disconect.
Electrical
Figure 19: Primary Power Connection
Installation | 22
Note: Regardless of selecting on/off or modulating control method, Nortec humidifiers
must have a closed circuit across their on/off security loop control terminal to
operate. Nortec highly recommends the use of a high limit humidistat and an air
proving switch in series for this function.
Caution: Failure to wire the humidifier in accordance with the wiring instructions could
cause permanent damage. Such errors will void the warranty.
1
2 3
10 ft min.
Humidity
Control
(return air
duct or
in room)
Duct High
Limit
Air
Proving
Switch
External Controls
Control Wiring
Controls are available from Nortec as accessories. If controls were not ordered with humidifier
they must be supplied by others. The following information is relevant to all controls, factory
supplied or otherwise. For wiring use minimum of 18 AWG and keep as short as possible.
The SETC humidifier can be operated with two modulating inputs. The SEP has one modulating
input which can be used for a duct high limit or humidity control. Both the SETC and SEP can be
operated as On/Off. See Control Setting on page 53 for SETC configuration and On/Off or
Modulating Control (J10) on page 61 for SEP configuration.
Control Location
Figure 20: Control Location
1 Air Proving Switch
Locate so that it can sense air flow or lack of it.
2 Duct High Limit
SETC can be modulating, On/Off, or a humidity sensor. 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
SETC can be Modulating, On/Off, or a Humidity Sensor. 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.
23 | Installation
Figure 22: Digital On/Off
Note: 1
2
3
4
Air Proving
Switch
Humidity Control
2548731 - On/Off
Wall Humidistat
Duct High Limit
2548732 - On/Off
Duct Humidistat
Humidifier Terminal Strip
Knockouts provided
in top and bottom panels.
Install strain relief (by others)
Humidifier will run when circuit between
terminal 1 and 2 on humidifier is closed.
Terminal 1 is 24VAC Hot, turn unit off to
avoid shorting while wiring.
Digital Humidistats require 24 VAC power
from terminals 1 and 3 of humidifier.
Humidity Control can be wall mounted
as shown or return air duct mounted.
1- 24 VAC
2 - On/Off Loop
3 - Ground
4 - Control Signal
5 - Limit Signal (SETC only)
6 - 5 VDC
7 - Ground
8 - Full Tank Blow Down
9 - Ground
10 11 - Actuator power
12 -
Actuator power
0-10 VDC Out
1 - Ground
2 - 24 VAC
3 - Common
4 - Digital Out
5 - Fan Relay
6 - Fan Relay
7 - NTC Sensor
8 - NTC Sensor
Air Proving Switch
Wire to make when
sensing air flow
Duct High Limit
2548732 - On/Off Duct Humidistat
Wire to make on drop in humidity
Humidity Control
2548731 - On/Off Wall Humidistat or,
2548732 - On/Off Duct Humidistat
S
E
E
X
T
Connect 24 VAC,
term inal 1 of humidifier to
term inal 2 of controllers.
Com
N/O
1 - Ground
2 - 24 VAC
3 - Common
4 - Digital Out
5 - Fan Relay
6 - Fan Relay
7 - NTC Sensor
8 - NTC Sensor
OR
On/Off Control Wiring
Figure 21: On/Off Controls
Installation | 24
1 - Ground
2 - 24 VAC
6 - Analog Out
8 - Temperature
Insert On/Off
controls or jumper
between 1 and 2
1510142 - Digital Wall Humidistat
1 - Ground
2 - 24 VAC
6 - Analog Out
7 - Analog In
8 - Temperature
2520266 - Digital Duct Humidistat
Package
S
E
Analog Out - 3
24 VAC - 2
Ground - 1
Connect 24 VAC, terminal
1 of SETC/P to terminal
2 of controllers.
1- 24 VAC
2 - On/Off Loop
3 - Ground
4 - Control Signal
5 - Limit Signal (SETC only)
6 - 5 VDC
7 - Ground
8 - Full Tank Blow Down
9 - Ground
10 11 - Actuator power
12 -
Actuator power
0-10 VDC Out
E
X
T
Figure 24: Digital Modulating Humidistats
Install On/Off controls or jumper between
terminal 1 and 2 of humidifier in order to run.
Terminal 1 is 24 VAC Hot, turn unit off to
avoid shorting while wiring.
High Limit Humidistat must be duct mounted.
It can be On/Off or modulating.
Control Humidistat can be mounted in space
or in return air duct and can be On/Off or
modulating.
The SEP can only accept one modulating
signal.
Air Proving
Switch
High Limit Humidistat
Control Humidistat
Humidifier Terminal Strip
Knockouts provided
in top and bottom panels.
Install strain relief (by others)
Note: 1
2
3
4
5
Modulating Control Wiring
25 | Installation
Figure 23: Modulating Controls
Air Proving
Switch
Duct High
Limit
2520261 - Digital
Wall W/O Sensor
1509858 - Wall
Sensor
Wire wall sensor to digital display as shown
below, wire digital display to humidifier as shown
for 1510142 - Digital Wall Humidistat.
+
1509858 - Wall Sensor
2520261 - Digital Wall W/O Sensor
Humidifier Terminal Strip
Knockouts provided
in top and bottom panels.
Install strain relief (by others)
1 - Ground
2 - 24 VAC
6 - Analog Out
7 - Analog In
8 - Temperature
1 - Ground
2 - 24 VAC
6 - Analog Out
1509858 - Wall
Sensor
2520261 - Digital
Wall W/O Sensor
1- 24 VAC
2 - On/Off Loop
3 - Ground
4 - Control Signal
5 - Limit Signal (SETC only)
6 - 5 VDC
7 - Ground
8 - Full Tank Blow Down
9 - Ground
10 11 - Actuator power
12 -
Actuator power
0-10 VDC Out
Connect 24 VAC, terminal
1 of SETC/P to terminal
2 of controllers.
Figure 25: Digital Wall Humidistant – Remote Wall Sensor
Figure 26: Remote Wall Sensor Wiring
Installation | 26
Figure 28: Digital
Air Proving
Switch
Duct High Limit
1509857 - 2-10V
Duct Humidity
Transducer
Humidity Control
1509858 - 2-10V Wall
Humidity Transducer
Install On/Off controls or jumper between
terminal 1 and 2 of humidifier
Terminal 1 is 24 VAC Hot, turn unit off to
avoid shorting while wiring.
Duct High limit can be duct humidity
transducer as shown or duct On/Off
humidistat.
Humidity Control can be wall humidity
transducer as shown, duct humidity
transducer, or On/Off humidistat.
.
Humidifier Terminal Strip
Knockouts provided
in top and bottom panels.
Install strain relief (by others)
Note: 1
2
3
4
1 - Ground
2 - 24 VAC
6 - Analog Out
1509858 - 2-10V Wall Humidity
T ransduc e r
1 - Ground
2 - 24 VAC
3 - Analog Out
Insert On/Off
controls or jumper
between 1 and 2
1509857 - 2-10V Duct Humidity
T ransduc e r
Connect 24 VAC,
term inal 1 of SETC to
term inal 2 of controllers
1- 24 VAC
2 - On/Off Loop
3 - Ground
4 - Control Signal
5 - Limit Signal (SETC only)
6 - 5 VDC
7 - Ground
8 - Full Tank Blow Down
9 - Ground
10 11 - Actuator power
12 -
Actuator power
0-10 VDC Out
E
X
T
S
E
Transducer Control Wiring (SETC Only)
27 | Installation
Figure 27: Transducers
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