Nortec EL005, EL020, EL030, EL050, EL075 Installation Manual

INSTALLATION MANUAL

Electrode Steam Humidifier
Nortec EL Series

2582302_C_EN_1611

Humidication and Evaporative Cooling

IMPORTANT! Read and save these instructions. This manual to be left with the equipment.

Thank you for choosing Nortec

Installation date (DD/MM/YYYY):

Commissioning date (DD/MM/YYYY):

Site:

Model:

Serial number:

Manufacturer

Nortec Humidity Ltd.
2740 Fenton Road, Ottawa, ON, Canada K1T 3T7
Tel. 1.866.NORTEC1, Fax [phone]
[e-mail], www.humidity.com

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, operation or maintenance of
the customer's equipment.

Liability Notice

Nortec Humidity Ltd. does not accept any liability due to incorrect installation, maintenance or operation of the
equipment, or due to the use of parts/components/equipment that are not authorized by Nortec Humidity Ltd.

Copyright Notice

Copyright 2016, Nortec Humidity Ltd, All rights reserved.

Technical modication rights reserved.

iiiContents

Nortec EL

2582302_C_EN_1611

Contents

1 Introduction 1

1.1 Before You Start! 1

1.2 General 1

2 For Your Safety 3

3 Receiving and Storage 5

3.1 Inspection 5

3.2 Storage and Transportation 5

4 Product Overview 7

4.1 General Description 7

4.2 Models Overview 8

4.3 Model Designation 8

4.4 Options 9

4.5 Accessories 10

5 Installation 11

5.1 General 11

5.2 Installation Overview 12

5.2.1 Typical Installation for Duct Humidication 12

5.2.2 Typical Installation for Direct Room Humidication 14

5.3 Site Requirements 15

5.4 Mounting the Humidier 16

5.4.1 Location and Clearances 16

5.4.2 Standard Mounting 18

5.4.3 Mounting Using Optional Mounting Bar 20

5.4.4 Mounting to OSHPD Seismic Requirements 22

5.4.5 Mounting Checklist 24

5.5 Steam Line Connections 24

5.5.1 Steam Distribution Using the Air Handling Unit 24

5.5.2 Steam Distribution Using the Blower Pack 24

5.5.2.1 Placement of Humidier 24

5.5.2.2 Remote-Mounted Blower Pack 25

5.5.3 Best Practices for Installing Steam and Condensate Lines 26

5.5.3.1 Common Steam and Condensate Line Installation Mistakes 34

5.5.4 Steam Connections Checklist 35

5.6 Water Connections 36

5.6.1 Water Connections Overview 36

5.6.2 Water Connection Requirements 38

5.6.3 Water Connections Checklist 38

5.7 Humidity Control Systems 39

5.7.1 Control Device Locations 39

5.7.2 Permissible Control Signal Inputs 39

iv Contents

2582302_C_EN_1611 Nortec EL

5.8 Electrical Connections 40

5.8.1 General 40

5.8.2 Wiring Diagrams 41

5.8.2.1 Nortec EL Steam Humidier, Steam Cylinder A 41

5.8.2.2 Nortec EL Steam Humidier, Steam Cylinder B (Large Units Only) 43

5.8.3 External Connections 44

5.8.3.1 3-Phase Power Supply Connection 44

5.8.3.2 Single-Phase Power Supply Connection 45

5.8.3.3 External Safety Chain 46

5.8.3.4 Modulating Demand or Humidity Signal 47

5.8.3.5 Ohmic Humidity Controller (Passive) 48

5.8.3.6 24V On/Off Humidistat 49

5.8.3.7 External On/Off Input 49

5.8.3.8 Dual Steam Cylinders Control Wiring 50

5.8.3.9 Remote Relay PCB Connections 51

5.8.3.10 Accessory Relay PCB Connections 52

5.8.3.11 Modbus Connection 53

5.8.4 Connecting Multiple Units Using Linkup 54

5.8.5 Maximum External Fuse 55

5.8.6 Electrical Connections Checklist 57

6 ProductSpecications 59

6.1 Weights 59

6.2 Dimensions 60

A Appendix i

A.1 Installation Checklist i

B Appendix iii

B.1 Commissioning Checklist iii
B.1.1 Pre-Start-Up Checklist iii
B.1.2 Performance Checklist vi

1Introduction

Nortec EL

2582302_C_EN_1611

1 Introduction

1.1 Before You Start!

Thank you for purchasing the Nortec EL steam humidier.

The Nortec EL steam humidier incorporates the latest technical advances and meets all recognized
safety standards. Never-the-less, improper use of the Nortec EL steam humidier may result in danger
to the user or third parties, and/or damage to property.

To ensure safe, proper and economical operation of the Nortec EL steam humidier, observe and comply
with all information and safety instructions contained in this manual, as well as all relevant documenta­tion of components of the installed humidication system.

If you have additional questions, contact your local Nortec representative. They will be glad to assist you.

1.2 General

Limitations

The subject of this manual is the Nortec EL steam humidier. The various options and accessories
may only be described in-so-far as is necessary for proper installation and operation of the equipment.
Additional information on available options and accessories can be obtained in the instructions that are
supplied with them.

This manual is restricted to the installation of the Nortec EL steam humidier, and is intended for well
trained personnel who are suitably qualied for their respective tasks.

Symbols Used in This Manual

CAUTION!

The word "CAUTION" in conjunction with the general caution symbol is used to provide safety
instructions that, if neglected, may cause damage and/or malfunction of the unit or damage to
property.

WARNING!

The word "WARNING" in conjunction with the general warning symbol is used to provide safety
instructions that, if neglected, may cause injury to personnel. Other specic warning symbols may
also be used in place of the general symbol.

DANGER!

The word "DANGER" in conjunction with the general danger symbol is used to provide safety
instructions that, if neglected, may cause severe injury to personnel or even death. Other specic
danger symbols may also be used in place of the general symbol.

2 Introduction

2582302_C_EN_1611 Nortec EL

Other Related Publications

This installation manual is supplemented by other publications such as the operation and maintenance
manual, spare parts list, etc., which are included in the delivery of the equipment. Where necessary,
appropriate cross-references to these publications have been added in this manual.

Storage of Manual

Keep this manual in a place where it is safe and readily accessible. If the equipment is moved to another
location, make sure that the manual is passed on to the new user.

If the manual is lost or misplaced, contact your local Nortec representative for a replacement copy.

.

3For Your Safety

Nortec EL

2582302_C_EN_1611

2 For Your Safety

General

Every person who is tasked with the installation of the Nortec EL steam humidier must read and under­stand this manual before performing any work. Knowing and understanding the contents of the installa­tion manual and the operation and maintenance manual is a basic requirement for protecting personnel
against any kind of danger, preventing faulty operation, and operating the unit safely and correctly.

All labels, signs and marking applied to the Nortec EL steam humidier must be observed and kept in
a readable state.

PersonnelQualications

All procedures described in this manual must only be performed by personnel who are adequately quali­ed, well trained and are authorized by the customer.

For safety and warranty reasons, any activity beyond the scope of this manual must only be performed
by qualied personnel authorized by Nortec.

All personnel working with the Nortec EL steam humidier must be familiar with, and comply with the
appropriate regulations on workplace safety and prevention of accidents.

Intended Use

The Nortec EL steam humidier is intended exclusively for air humidication using a Nortec-approved
steam distributor or blower pack within specied operating conditions (refer to the Operation and
Maintenance Manual for details). Any other type of application, without the express written consent of
Nortec, is considered to be not conforming to its intended purpose, and may lead to dangerous opera­tion and will void the warranty.

In order to operate the equipment in the intended manner all information contained in this manual, in
particular the safety instructions, must be observed closely.

DangersthatmayarisefromtheNortecELsteamhumidier:

DANGER!
Risk of electric shock!

The NortecELsteamhumidierismainspowered.Livepartsmaybeexposedwhenthedoor
panels are removed. Touching live parts may cause severe injury or even death.

Prevention: The Nortec EL steam humidier must be connected to the mains only after all installa-

tion work has been completed, checked for correct workmanship, and the door panels are installed
and fastened securely.

WARNING!
Risk of severe burns from exposure to hot steam vapors!

The Nortec EL steam humidier uses hot steam vapors for humidication. Bare skin exposed to hot
steam vapors can result in severe burns.

Prevention: Avoid contact with hot steam. Or, wear appropriate personal protective equipment
when working near steam vapors.

4 For Your Safety

2582302_C_EN_1611 Nortec EL

Preventing Unsafe Operation

All personnel working with the Nortec EL steam humidier must immediately report to the customer any
alterations to the unit that may affect safety, and securethehumidieragainstaccidentalpower-up.

ModicationstotheUnitProhibited

Modicationsarenotpermitted on the Nortec EL steam humidier without the express written consent

of Nortec.

5Receiving and Storage

Nortec EL

2582302_C_EN_1611

3 Receiving and Storage

3.1 Inspection

After receiving the shipment, inspect the goods as follows:

– Inspect the shipping boxes for damage.

Report any shipping box damages to the shipping company without delay.

– Check the goods against the packing slip to ensure that all items have been delivered.

Report any shortages to your Nortec representative within 48 hours of receipt of the goods. Nortec
does not assume responsibilities for any shortages beyond this period.

– Unpack the parts/components and check for any damage.

If parts/components are damaged, notify the shipping company immediately.

– Verify the model type on the rating label to ensure that it is suitable for your installation. Refer to

Figure 3 on page 9.

3.2 Storage and Transportation

Storage

Store the Nortec EL steam humidier in its original packaging inside a protected area that meets the
following requirements until it is installed, or if it needs to be stored for an extended period of time:

– Room temperature: 41 to 104 °F (5 to 40 °C)

– Room humidity: 10 to 75% RH

Transportation

For optimum protection always transport the unit and components in their original packaging, and use
appropriate lifting/transporting devices.

Packaging

Keep the original packaging of the unit/components for later use.

If the packaging needs to be disposed off, observe local regulations on waste disposal. Recycle pack­aging where possible.

6 Receiving and Storage

2582302_C_EN_1611 Nortec EL

This page intentionally left blank

7Product Overview

Nortec EL

2582302_C_EN_1611

4 Product Overview

4.1 General Description

The Nortec EL steam humidier is an advanced electrode steam humidier with state-of-the-art features.
It has an integrated controller which not only controls the humidier, but also allows the humidier to be
connected to a building automation system, or an off-line computer, so it can be controlled and moni­tored remotely.

The Nortec EL steam humidier comes in three different housing sizes depending on the steam capac­ity. Refer to Figure 1. These units can range from 5 lb/h (2.2 kg/h) to 200 lb/h (91 kg/h) – refer to "Models

Overview" on page 8. Models with steam capacity up to 100 lb/h (45 kg/h) can also be ordered with a

built-on blower pack. The large models, with steam capacity from 150 lb/h (68 kg/h) to 200 lb/h (91 kg/h),
are equipped with dual steam cylinders – each with its own dedicated driver board.

The dedicated driver boards in the large models allow the steam cylinders to be congured to operate in
series, in parallel or independent mode. Two separate sets of control signals are needed for independ­ent mode of operation. In series mode, the output capacity of steam cylinder "A" is congured to 0-50%
of humidier demand, and steam cylinder "B" to 50-100% of humidier demand. In parallel mode, the
output capacity of each steam cylinder is congured to 0-100% of humidier demand.

In addition, up to six integrated controllers (for a maximum of 12 steam cylinders) can be set up in a
"main-extension" conguration using Nortec's Linkup system to satisfy large humidication needs.

Figure 1:

1

2

3

4

Nortec EL Steam Humidier Model Sizes

1 Small model, steam cylinder "A" only
2 Medium model, steam cylinder "A" only
3 Large model, steam cylinder "B"
4 Large model, steam cylinder "A"

8 Product Overview

2582302_C_EN_1611 Nortec EL

4.2 Models Overview

The Nortec EL steam humidier is available in different sizes (S, M and L) with different heating voltages
and steam capacities as shown in Table 1 below.

Table 1: Nortec EL Steam Humidier Models

Housing

Size

Nortec EL

Model

110-

120V/1~

208V/1~

220-

240V/1~

277V/1~

380-

415V/1~

440-

480V/1~

550-

600V/1~

208V/3~

220-

240V/3~

380V/3~

440-

480V/3~

550-

600V/3~

lb/h

(kg/h)

lb/h

(kg/h)

lb/h

(kg/h)

lb/h

(kg/h)

lb/h

(kg/h)

lb/h

(kg/h)

lb/h

(kg/h)

lb/h

(kg/h)

lb/h

(kg/h)

lb/h

(kg/h)

lb/h

(kg/h)

lb/h

(kg/h)

S 005 5

(2.2)

– – – – – – – – – – –

010 – 10

(4.5)10(4.5)10(4.5)10(4.5)10(4.5)10(4.5)

– – – – –

020 – 20

(9)

20

(9)

20

(9)

20

(9)

20

(9)

20

(9)

20

(9)

20

(9)

20

(9)

20

(9)

20

(9)

030 – – – – – – 30

(13.6)30(13.6)30(13.6)30(13.6)30(13.6)

M 050 – – – – – – 50

(22.7)50(22.7)50(22.7)50(22.7)50(22.7)

075 – – – – – – 75

(34)75(34)75(34)75(34)75(34)

100 – – – – – – 90

(41)

100

(45)

100

(45)

100

(45)

100

(45)

L 150* – – – – – – 150

(68)

150

(68)

150

(68)

150

(68)

150

(68)

200* – – – – – – 180

(82)

200

(91)

200

(91)

200

(91)

200

(91)

* These models have two steam cylinders.

4.3 Model Designation

The specication label on the side (and the underside) of the Nortec EL steam humidier shows its model
number, serial number and ratings – refer to Figure 3 on page 9. The breakdown of the model number
is shown in Figure 2. For other details of the specication label refer to the Operation and Maintenance
Manual.

Figure 2:

Nortec EL 100 400V/3~Space

Product series:

Steam capacity (lb/h):

Model:

Blank = Duct
Space = with Blower Pack
RMBP = with power for remote-mounted Blower Pack

Heating voltage and phase:

Model Breakdown

9Product Overview

Nortec EL

2582302_C_EN_1611

Figure 3:

Circuit Protection

MADE IN CANADA

HUMIDIFIER

LISTED

205X

MODEL:

VOLTS:
AMPS:
KW:

MAX:

XXXXXXXXXXXXXXXXXXXXXXXX

S/N:

XXXXXXX

XXXXXXXXXXXX

PHASE:

XXXX

HZ:

XXXXXX

XXXXX

XXXXXXXXX

XXX

DATE:

XXXXXXXXX

XXXXXXXX B

AMPS

Nortec EL Steam Humidier Specication Label

4.4 Options

Table 2 shows the list of options for the Nortec EL steam humidier. Contact your Nortec representative

for details.

Table 2: Nortec EL Options

Option Application

Mounting bar Provides two mounting bars which t into each other for wall mounting. One bar is fastened

to the humidier, the other bar is fastened to the wall. The unit can be hung onto the wall by
engaging the two mounting bars. Note: The unit can also be wall mounted (without this op­tion) using the keyhole cutouts on the back of the humidier housing.

Mounting rack Stand-alone rack for mounting the Nortec EL steam humidier.

Remote fault indication PCB
(printed circuit board)

Printed circuit board with relay contacts for connecting remote status displays for “Unit On”,
“Steam”, “Error” and “Service”.

Accessory relay PCB
(printed circuit board)

Printed circuit board with relay contacts for connecting other accessories such as fans and
supply water ushing valves.

Internal primary fusing Optional internal fuse for heating voltage power supply. Only available as a factory-installed

option. Note: This is not a substitute for a dedicated external disconnect switch.

Fill cup extension Kit for extending the ll cup so the humidier can accommodate backpressure of up to

10 in H20 (2.49 kPa).

Extreme drain water cooling Kit for cooling drain water to less than 120°F (49°C) before it is discharged into the drain.

Foam detection kit Kit for extending the ability of the humidier to handle a wider range of water supply quality.

BACnet MSTP BTL PCB to provide BTL certied BACnet MSTP. This option also enables full Master functionality

when using BACnet MSTP.

BACnet IP BTL PCB to provide BTL certied BACnet IP.

LonWorks board Supplementary board to connect the Nortec EL to a building management system using

LonWorks.

10 Product Overview

2582302_C_EN_1611 Nortec EL

Option Application

Remote blower pack power
kit

When a remote blower pack is being installed with the humidier, this option provides a
transformer, fusing, and a terminal block inside the humidier to provide power to the remote
blower pack. Without this option, a separate 110-120V supply must be provided for the
remote blower pack.

4.5 Accessories

Table 3 shows the list of accessories for the Nortec EL steam humidier. Contact your Nortec representative

for details. To install and operate the accessories, refer to the instructions supplied with the accessories.

Table 3: Nortec EL Accessories

Accessory Application

Steam distributor Steam distribution system for use in an air duct.

SAM-e steam distribution
manifold

Steam distribution system for use in an air duct where reduced absorption distance is re­quired.

Blower pack, built-on or

remote

For direct room humidication or use in conditioned spaces without a built-in air distribution
system. The EL Space model has a blower pack mounted directly, the EL RMBP model has
power for a remote-mounted blower pack (blower pack ordered as an accessory).

Digital or analog control
humidistat with either On/Off
or modulating operation

Input device used to meter the output of the humidier based on the sensed relative humidity.
The humidistat can be installed in the conditioned space that is being humidied, or within
the duct.

Digital RH transducer Input device used to communicate the relative humidity in a conditioned space or a duct to

the humidier.

Digital or analog high limit
humidistat with either On/Off
or modulating operation

Input device used to limit the output of the humidier by either shutting it down or throttling it
down when the humidity in the duct approaches the high limit.

Air proving switch Input device to ensure that humidication only occurs when air is moving through the duct.

Outdoor temperature sensor Input device used to communicate the outdoor temperature to the humidistat so that it can

lower the setpoint value during cold weather to prevent condensation on exterior windows/
surfaces.

11Installation

Nortec EL

2582302_C_EN_1611

5 Installation

5.1 General

Strictly observe and perform all installation tasks including the mounting of the unit and connection of
the water, steam and power supplies as described in this manual.

Observe and comply with all local and national codes dealing with water, steam and electrical installations.

Nortec does not accept any liability for installation of humidication equipment by unqualied personnel,
or the use of equipment/parts that are not authorized by Nortec.

PersonnelQualications

All installation work must be performed only by licensed personnel authorized by the customer. It is the
customer’s responsibility to verify qualications of the personnel.

Safety

Observe the following safety precautions:

DANGER!
Risk of electric shock!

The Nortechumidierismainspowered.Livepartsmaybeexposedwhenthedoorpanels
are open. Touching live parts may cause severe injury or even death.

Prevention: The Nortec humidier must be connected to the mains only after all installation work

has been completed, checked for correct workmanship, and the door panels are closed and fas­tened securely.

CAUTION!
Risk of damage to internal components from electrostatic discharge (ESD)!

Theelectroniccomponentsinsidethehumidieraresensitivetoelectrostaticdischarge

(ESD).

Prevention: Take appropriate measures to protect the electronic components inside the unit against
damage caused by electrostatic discharge (ESD). Refer to ANSI/ESD-S20.20.

12 Installation

2582302_C_EN_1611 Nortec EL

5.2 Installation Overview

The Nortec EL humidier can use a steam distributor to distribute steam through air ducts – refer to

Figure 4. The humidier can also use a blower pack to distribute steam directly into a conditioned space

– refer to Figure 5 on page 14.

5.2.1 TypicalInstallationforDuctHumidication

Figure 4:

min. 10 ft (3m)

B or min. 8-10 ft (2.4-3m)

n

1, 2

4

5

6

7

8

9

10

12

13

2, 3

11

Typical Installation for Duct Humidication

13Installation

Nortec EL

2582302_C_EN_1611

Legend:
1 High limit On/Off humidistat (external safety chain)
2 Humidity sensor or modulating humidistat (used for control of space in return duct, or high limit in supply duct)
3 On/Off humidistat (used for humidity control)
4 Steam line (see Note 1 below)
5 Electrical disconnect, high voltage supply
6 Drain line (see Note 2 below)
7 Air gap with optional trap (see Note 3 below)
8 Water supply (see Note 4 below)
9 Condensate line (see Note 5 below)
10 Steam distributor (see Note 6 below)
11 Air proving switch (external safety chain)
12 Supply air duct
13 Return air duct

Note1: The steam line should be as short as possible – the maximum length varies depending on unit
capacity and material used (refer to Table 6 on page 28). The steam line should have adequate upslope
(minimum 10°) /downslope (minimum 2°), without restrictions and with a condensate trap at the lowest
point. Steam traps are required every 15 ft (5 m) for long runs. The steam line must rise a minimum of
12 in (30 cm) straight up before running to the steam distributor. The minimum bend radius for steam
hose is 12 in (30 cm), or 5× the internal diameter for rigid pipes. Refer to Table 6 on page 28 for steam
line recommendations.

Note2: The drain line should have a minimum internal diameter of 7/8 in (22 mm), with a constant
minimum downslope of 1 in/48 in (1.2°) to the funnel, and must not touch the sides or bottom of funnel.

Note3: The air gap and trap should be located to the left of the humidier, as shown. A 2-1/2 in to 7/8 in
(63.5 mm to 22 mm) reducer is ideal (Nortec option P/N 2522172). The hose must not touch the bottom
of the funnel.

Note4: Water supply should be potable drinking water, with conductivity of 150-1200 micro-siemens/
cm (0-12 gpg). The water supply line should have a minimum diameter of 1/2 in (13 mm) with a shutoff
valve. An optional 5 μm lter is also recommended. Water temperature should be 34-104°F (1-40°C).
Pressure should be surge-free and regulated to 30-80 psig (207-550 kPa).

Note5: Condensate drain line from the steam distributor should have a constant minimum downslope
of 1 in/48 in (1.2°), with no restrictions and a minimum trap height of 8 in (200 mm). The trap should be
located a minimum of 12 in (30 cm) below the steam distributor.

Note6: The distance from the steam distributor to any obstruction or transition in the duct should be
equal to the calculated absorption distance B

n

or a minimum of 8-10 ft (2.4-3 m) if Bn is not known. For
details refer to the installation manual for the relevant steam distribution system. The absorption distance
can be obtained using Nortec HELP. The steam distributor capacity must equal or exceed the maximum
capacity of the humidier.

14 Installation

2582302_C_EN_1611 Nortec EL

5.2.2 TypicalInstallationforDirectRoomHumidication

Figure 5:

1

2

3

4

5, 6

7

8

9

10

11

12

Typical Installation for Direct Room Humidication

1 Blower pack, remote-mounted
2 Steam line (see Note 1 below)
3 Blower pack, built-on
4 High level On/Off humidistat (external safety chain)
5 Humidity sensor or humidistat (used for control of space humidity or high limit)
6 On/Off humidity control
7 Electrical disconnect, high voltage supply
8 Drain line (see Note 2 below)
9 Air gap with optional trap (see Note 3 below)
10 Water supply (see Note 4 below)
11 Condensate drain line (routed to oor drain, see Note 5 below)
12 Condensate drain connection through ll cup to steam cylinder (for remote blower pack)

Note1: The steam line should be as short as possible – the maximum length varies depending on unit
capacity and material used (refer to Table 6 on page 28). The steam line should have adequate upslope
(minimum 10°) /downslope (minimum 2°), without restrictions and with a condensate trap at the lowest
point. Steam traps are required every 15 ft (5 m) for long runs. The steam line must rise a minimum of
12 in (30 cm) straight up before running to the steam distributor. The minimum bend radius for steam
hose is 12 in (30 cm), or 5× the internal diameter for rigid pipes. Refer to Table 6 on page 28 for steam
line recommendations.

15Installation

Nortec EL

2582302_C_EN_1611

Note2: The drain line should have a minimum internal diameter of 7/8 in (22 mm), with a constant mini­mum downslope of 1 in/48 in (1.2°) to the funnel, and must not touch the side or bottom of the funnel.

Note3: The air gap and trap should be located to the left of the humidier, as shown. A 2-1/2 in to 7/8 in
(63.5 mm to 22 mm) reducer is ideal (Nortec option P/N 2522172). The hose must not touch the bottom
of the funnel.

Note4: Water supply should be potable drinking water, with conductivity of 150-1200 micro-siemens/
cm (0-12 gpg). The water supply line should have a minimum diameter of 1/2 in (13 mm) with a shutoff
valve. An optional 5 μm lter is also recommended. Water temperature should be 34-104°F (1-40°C).
Pressure should be surge-free and regulated to 30-80 psig (207-550 kPa).

Note5: For remote-mounted blower pack, the condensate line can be routed to either an external drain
or to the ll cup of the humidier. The condensate drain line from the blower pack should have a constant
minimum downslope of 1 in/48 in (1.2°), with no restrictions and a minimum trap height of 8 in (200 mm).
The trap should be located a minimum of 12 in (30 cm) below the condensate port on the blower pack.

5.3 Site Requirements

In preparation for installation of the Nortec EL steam humidier, make sure that the following site require­ments are satised. Report any discrepancies to the site engineer.

SteamandCondensateLines:

 When choosing the location of the humidier, install it as close as possible to the steam distributor

to minimize heat loss through the steam line.

 When possible, install the humidier below the steam distributor. Make sure that the selected loca-

tion permits proper routing of steam and condensate lines as described in "Best Practices for Installing

Steam and Condensate Lines" on page 26.

Mounting

 Allow adequate clearances around the humidier for ease of maintenance. Although the

Nortec EL steam humidier requires no side clearance, Nortec recommends minimum clearances
of 6 in (150 mm) on the side. A 24 in (610 mm) clearance between the humidier and the ground is
required. Observe all local and national installation codes. Nortec is not responsible for any instal­lation code violations.

 Do not mount the humidier on hot surfaces, or surfaces that can freeze, or near vibrating compo-

nents, or on the oor. In addition, the mounting surface must be able to withstand temperatures of
140-158°F (60-70°C) that can be generated during operation of the humidier.

 The humidier should be mounted on a wall or other suitable surface that offers a sufciently high

load-bearing capacity. Refer to Table 15 on page 59 for operating weights.

 The Nortec EL steam humidier should be installed in a drip-proof location within buildings, where

the ambient temperature is 41-104°F (5-40°C) and the relative humidity is 5-95% (non-condensing).

Water Supply

 The water supply to the humidier must be cold potable drinking water, and not reverse osmosis

(RO) or deionized (DI) water. The water quality requirements are listed in Table 4 below.

Table 4: Water Quality Requirements

Conductivity

(μS/cm)

Hardness

(gpg)

Silica
(ppm)

Alkalinity

(pH)

150-1200* 0-12 0-4 7-7.5

0-3 4-14

* Default humidier conguration supports approximately 330-670 μS/cm.

 The water supply should have a minimum ow rate of 0.9 gpm (3.3 L/min), and should be pressure

regulated to 30-80 psig (207-550 kPa), with spike pressure limited to 120 psig (827 kPa).

 The water supply should be ltered to 5 μm (optional, but recommended).

16 Installation

2582302_C_EN_1611 Nortec EL

 Water temperature should be 34-104°F (1-40°C).

 The diameter of the water supply piping should be minimum 1/2 in (13 mm), and must have a 1/2 in

NPT female end.

 The water supply line should be made of copper, stainless steel or plastic certied for drinking water

systems.

 A shutoff valve and a union tting must be supplied in the water supply line for ease of maintenance.

 The water supply should be free of additives such as corrosion inhibitors, disinfectants, etc., which

may affect the performance of the humidier. If using softened or partially softened water, contact
your Nortec representative for assistance.

Drainage

 The humidier should be connected to a dedicated building drain (recommended) with a minimum

drainage rate of 2.3 gal/min (8.7 L/min) per steam cylinder. For safety reasons, drain water from the
humidier should not empty into a sink used by personnel. The drain line must allow free and easy
draining. A restricted drain can cause water in the humidier to over-concentrate and result in poor
operation, or cause water to back up at the air gap funnel.

 The building drain pipe should be made of either copper or stainless steel (minimum DIN 1.4301)

so it can handle drain water temperatures up to 212 °F (100 °C).

 The space in which the humidier is to be installed should have a oor drain. However, if a oor drain

is not available, a leakage monitoring device must be installed (by others) to permit interruption of
the water supply in case of a leakage.

Power Supply

 The power supply to the humidier should be adequate to match the full voltage and current draw

shown on the specication label of the humidier.

 The power supply must have an external dedicated fused disconnect switch. The fusing must not

exceed the maximum circuit protection indicated on the specication label. Refer to Figure 3 on page 9.

5.4 MountingtheHumidier

Refer to "Site Requirements" on page 15 for the location and mounting requirements for the
Nortec EL steam humidier.

5.4.1 Location and Clearances

The location of the humidier depends largely on the steam distribution system. For the required minimum
clearances for a Nortec EL steam humidier with a built-on blower pack refer to "Placement of Humidier" on

page 24; or refer to the blower pack manual for a remote-mounted blower pack.

For all other steam distribution systems refer to Figure 6. The clearance dimensions shown are for refer­ence only, and are suggested clearances for ease of maintenance. Consult local and national installation
codes. Nortec does not accept responsibility for violations of the installation codes.

17Installation

Nortec EL

2582302_C_EN_1611

Figure 6:

W

D

H

0 in
(0 mm)

min. 24 in

(610 mm)

min. 12 in

(300 mm)

min. 36 in

(915 mm)

0 in
(0 mm)

Nortec EL Humidier Suggested Clearances

18 Installation

2582302_C_EN_1611 Nortec EL

5.4.2 Standard Mounting

Locate the Nortec EL humidier according to "Location and Clearances" on page 16, and install it on the
mounting surface as follows:

1. Locate 2×4 wooden studs or equivalent support in the mounting surface, and mark the attachment
points “A” and “B” at the desired position with the help of a level. For small or medium housing refer
to Figure 7. For large housing refer to Figure 8 on page 19.

Figure 7:

A

A

B

B

X

Y

1

Standard Mounting, Small or Medium Housing

1 Lag bolt, 1/4×2 in (×4)

Dimension

Housing Size

Small Medium

X 12.0 in

(305 mm)

16.0 in

(406 mm)

Y 17.56 in

(446 mm)

20.71 in

(526 mm)

19Installation

Nortec EL

2582302_C_EN_1611

Figure 8:

X

A

A

A

B

B

B

X

Y

1

Standard Mounting, Large Housing

1 Lag bolt, 1/4×2 in (×6)

2. Install 1/4×2 in lag bolts (supplied by others) at attachment points "A". Use longer screws if going
through drywall or other structural material into the mounting surface. Allow the heads of the screws to
extend 0.25 in (5 mm) from the mounting surface so that the humidier can be installed on the bolts.

3. Remove the door panels from the humidier.

WARNING!
Heavy object – risk of injury!

Thesmallhumidierweighs45lb(20kg),andthelargehumidierweights120lb(54kg).

Prevention: Use an appropriate lifting device, or request assistance to raise the humidier into

position.

4. Carefully raise and install the humidier onto the installed lag bolts.

5. Align the humidier with the help of a level, then tighten the lag bolts.

6. Install additional lag bolts (supplied by others) into the mounting surface at attachment points “B”,
and fasten securely.

7. Reinstall the door panels, and fasten them securely.

Dimension

Housing Size

Large

X 16.0 in

(406 mm)

Y 16.75 in

(426 mm)

20 Installation

2582302_C_EN_1611 Nortec EL

5.4.3 Mounting Using Optional Mounting Bar

Locate the Nortec EL humidier according to "Location and Clearances" on page 16, and install it on the
mounting surface as follows using the optional mounting bar. Mounting bars are a factory-installed option.
If ordered, the corresponding bars and bumpers will be riveted/installed to the housing at the factory.

1. Locate 2×4 wooden studs or equivalent support in the mounting surface, and mark the attachment
points “A” at the desired position with the help of a level. For small or medium housing refer to Figure 9.
For large housing refer to Figure 10 on page 21.

Figure 9:

X

A

A

A

X

1

2

3

4

Optional Mounting, Small or Medium Housing

1 Mounting bar
2 Flat washer (×3)
3 Lag bolt, 1/4×2 in (×3)
4 Screw, M6×10 (×1), supplied

Dimension

Housing Size

Small Medium

X 6.0 in

(152 mm)

8.0 in

(203 mm)