Nor-tec NHRS 135-180 Manual de usuario

Series

Installation and

Operation Manual

Includes installation, operation

maintenance and troubleshooting

information for your NHRS Resistive

Element Steam Humidifier

2530618-J | 10 NOV 2014

Important: Read and save these instructions. This guide to be left with equipment.

Thank you for choosing NORTEC.

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.

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.

INSTALLATION DATE (MM/DD/YYYY)

MODEL #

SERIAL #

Contents

1 Introduction

2 Receiving and Unpacking

3 Humidifier Components

4 Description of Components

5 NHRS Models

8 Installation

9 Typical Humidifier Installation

10 Location

12 Mounting with Keyholes

13 Plumbing

14 Steam Distributor

15 Steam Lines and Condensate

Return

21 Electrical

22 External Controls

29 Optional Outdoor Temperature

Setback Sensor

30 Remote Fault Option Wiring

31 Options and Accessories

33 Start Up

34 Installation Check

36 Start Up Procedure

38 Information Screens

45 How the Humidifier Works

47 Selecting an RH Setpoint

48 Maintenance and

Servicing

52 Troubleshooting

53 General Troubleshooting

55 Wiring Diagrams

57 Start Up Checklists

60 Maintenance Checklists

61 Spare Parts

62 NHRS Plumbing Parts

64 NHRS Electrical Parts

66 Warranty

1| Introduction

Introduction

CAUTION: Servicing

Disconnect main power before any servicing.

The plumbing and electrical compartments contain high voltage components and

wiring. Access should be limited to authorized personnel only.

During and following operation of the humidifier, the steam and components in

contact with the steam such as the cylinder, blower pack, steam lines, steam

distributors, and condensate lines can become hot and can burn if touched.

Nortec Humidity Ltd. 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 Humidity Ltd.

CAUTION: Electrical

All electrical work should be done according to local electrical code.

Electrical connection to be performed by a licensed electrician.

CAUTION: Plumbing

Plumbing to be performed by a licensed plumber.

Drain water from humidifier can be very hot. Do not drain to public sink.

All plumbing work should be done according to local plumbing code.

CAUTION: Installation

Do not mount on hot surfaces.

Do not mount in area where freezing can occur.

Do not mount on vibrating surface.

Do not mount on floor.

The NHRS produces steam at atmospheric pressure, no devices which could block

steam output should be connected to the steam outlet.

Steam lines must be installed so that no restriction can produce backpressure in

the humidifier. Failure to follow installation instructions will result in improper

operation and could void warranty.

Regardless of selecting On/Off or modulating control method, NORTEC humidifiers

must have a closed circuit across the 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.

Introduction | 2

Receiving and Unpacking

1Check packing slip to ensure ALL material has been delivered.

2All 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.

3Inspect shipping boxes for damage and note damages on shipping waybill accordingly.

4After unpacking, inspect equipment for damage. If damage is found, notify the shipper

promptly.

5All NORTEC products are shipped on a Free-On-Board (FOB) factory basis. Any and all

damage, breakage or loss claims are to be made directly to the shipping company.

Before Installation

1Ensure that available voltage and phase corresponds with humidifier voltage and phase as

indicated on humidifier specification label.

2Ensure that the dedicated external fuse disconnect is of sufficient size to handle the rated

amps as indicated on the specification label. Refer to local codes.

3Report any discrepancy immediately to the site engineer.

4Ensure sufficient clearances will be available as described on pages 10 and 11.

5Ensure steam lines can be routed to distributor or blower pack as described on pages 14-19

and 31.

Figure 1: Specification Label Location

3| Introduction

Humidifier Components

Figure 2: NHRS Humidifier Components

Introduction | 4

Description of Components

Table 1: Humidifier Components

Component

Function of Component

Auxiliary Drain

Switch

Drains water from boiling tank by activating drain pump. Note that initiating a

drain in this manner will not induct Drain Water Cooling.

Boiling Tank

Holds resistive elements submerged in water. Current traveling along the

internal element wire generates heat which is used to generate steam.

Condensate

Return

Provides a connection to return condensate to humidifier.

Contactor

Turns On/Off power to boiling tank elements.

Drain Pump

Drains water from boiling tank.

Drain Water

Cooling Valve

Adds cold supply water to water draining from boiling tank to temper drain

water to a maximum of 140ºF (60ºC).

Driver Board

Provides input and output connections to humidifier components.

Fill Cup

Provides an air gap for backflow prevention.

Fill Valve

Controls flow of water into humidifier.

High Voltage

Terminal Block

Primary power connection from remote disconnect to humidifier.

High Voltage

Transformer

Steps primary voltage down to 24 VAC for the controller and internal

components such as the fill valve and drain pump.

On/Off Switch

Turns power On/Off to humidifier controller. Note: Turn off humidifier

disconnect to shut off primary power to the humidifier.

Remote Relay

Board (option)

Provides a terminal strip to dry contacts which open/close to indicate the

humidifier is on, humidifying, needs service, or is in a fault condition.

Scale Tank

Scale created inside the boiling tank (on the elements and the side walls)

breaks off and gravitates to the scale tank for easy disposal.

Scale Tank

Drain Spigot

Manually activated drain spigot used to empty the scale tank of water before

removing and emptying tank of collected scale.

Solid State

Relay (optional)

Solid State Relays offer shorter cycles when turning the resistive elements On

and Off. Recommended for humidification applications requiring high

accuracy.

Steam Outlet

Connect to steam line with steam hose.

User Interface

Controls all functions of the humidifier operation and provides user ability to

modify configuration of the humidifier.

5| Introduction

NHRS Models

The NHRS is Nortec’s flagship resistive element electric humidifier. Since it can accept a variety

of supply water types (potable, Reverse Osmosis, De-Ionized), it is very robust and useful in a

wide set of applications. The NHRS is available in capacities ranging from 10 lb/hr (4.5 kg/hr)

to 180 lb/hr (81.6 kg/hr). NHRS humidifiers are packaged in two different cabinets, depending

on their capacity. Figure 3 shows the configuration and relative size of the different cabinets.

Table 3 on page 7 provides specifications for the NHRS product line.

Figure 3: NHRS Models

Double Unit (NHRS 135-180)

NHRS double units have two tanks to provide increased capacity. The construction and

installation of double units is identical to units with a single tank with the following exceptions:

In addition to having two tanks, double units also have two Driver Boards. One Driver

Board controls each tank.

Double units can operate both tanks in series or parallel from a single control signal

Parallel Operation –If configured for parallel operation, only one set of control wiring is

required. The tanks operate in parallel giving the advantage of even wear on both tanks.

Series Operation –One tank’s output range is 0-50% and the other tank’s output range

is 50-100%. An advantage is that a lower turndown ratio can be applied to one tank.

Hybrid Mode –One tank operates using Solid State Relay switching, the other tank

operates using contactor switching. See P/N 2530631.

Double units have one primary power connection, but have individual fill, drain, and

steam outlet connections for each tank.

Introduction | 6

Outdoor Model

The NHRS is available for outdoor use, providing a weatherproof enclosure that allows for

installation on rooftops in relatively extreme climates. Refer to the installation addendum that

is provided with the NHRS Outdoor model to ensure proper installation (P/N 2531550).

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

NHRS humidifier. Refer to the installation instructions that came with the accessories for

proper installation and operation.

Table 2: Options and Accessories

Component

Function of Component

Drain Water

Cooler, Low

Flow

Reduces drain rate from the humidifier by restricting the boiling tank drain

outlet diameter, as well as providing a lower-flow drain water cooling valve.

Dual Demand

Controller

Consists of a universal math module that compares two demand input signals

and outputs the lowest of the two to the humidifier. This option is useful

where a high limit modulating demand channel is desired (along with a

modulating demand channel humidistat), since the humidifier only allows one

modulating input. See P/N 2558776.

Keep Warm

(Outdoor

standard)

Maintains water temperature in boiling tank at 160ºF (70ºC) for quick

response of the unit to a call for humidity while minimizing health concerns

associated with standing water. See P/N 1504561.

Nortec

Online/LINKS2

Provides monitoring and control, allowing humidifier to communicate with a

Building Management System (BMS). Controller is factory installed and

located internally to the humidifier. At the time of ordering, customer must

specify the desired protocol: BACnet/IP, BACnet/MSTP, Johnson N2, or

LonWorks.

Nortec Online provides an internet-based monitoring and control system for

the humidifier.

Remote Relay

Board

Provides four built-in status relays for remote monitoring capabilities: steam

production, unit fault, maintenance/service, and unit power. Relays can

interface with a Building Management System (BMS). If one of the above

conditions is met, a relay will close which will complete a connection. A signal

will be provided to a wire terminal. See P/N 1508069.

Scale

Management

System

Provides a separate reservoir underneath boiling tank for scale collection.

Minerals removed from the boiling tank water during steam production will

collect in the scale reservoir rather than in the tank. When minor

maintenance is needed, the scale tank is easily removed and emptied.

Solid State

Relays

Allow for rapid response upon call for humidity, adapting instantly to humidity

demand, allowing for tight control of the in-space humidity.

7| Introduction

Table 3: NHRS Specifications

Phase

Capacity

lb/hr (kg/hr)

Volts

NHRS Part

No.

Amps

Max

Ext

Fuse

Fill

gpm

(l/min)

Net/Full

Weight lb

(kg)

10 (4.5)

208

2530540

18.4

3.83

3.8

(14.4)

119/190

(54/86)

10 (4.5)

220-240

2530541

15.9

3.83

10 (4.5)

440-480

2530542

8.0

3.83

10 (4.5)

550-600

2530543

6.4

3.83

15 (6.8)

208

2530544

24.5

5.10

15 (6.8)

220-240

2530545

21.3

5.10

15 (6.8)

440-480

2530546

10.6

5.10

15 (6.8)

550-600

2530547

8.5

5.10

20 (9.0)

208

2530548

36.8

7.65

20 (9.0)

220-240

2530549

31.9

7.65

20 (9.0)

440-480

2530550

15.9

7.65

20 (9.0)

550-600

2530551

12.8

7.65

30 (13.6)

208

2530552

49.0

10.20

30 (13.6)

220-240

2530553

42.5

10.20

30 (13.6)

440-480

2530554

21.3

10.20

30 (13.6)

550-600

2530555

17.0

10.20

30 (13.6)

208

2530556

31.9

11.48

30 (13.6)

220-240

2530557

27.6

11.48

30 (13.6)

440-480

2530558

13.8

11.48

30 (13.6)

550-600

2530559

11.1

11.48

45 (20.4)

208

2530560

42.5

15.30

45 (20.4)

220-240

2530561

36.9

15.30

45 (20.4)

440-480

2530562

18.4

15.30

45 (20.4)

550-600

2530563

14.7

15.30

65 (29.4)

208

2530606

63.8

22.98

65 (29.4)

220-240

2530609

55.3

22.98

65 (29.4)

440-480

2530610

27.6

22.95

65 (29.4)

550-600

2530611

22.1

22.95

90 (40.8)

440-480

2530612

36.9

30.60

90 (40.8)

550-600

2530613

29.5

30.60

135 (61.2)

440-480

2530614

55.3

45.90

7.6

(28.8)

186/330

(85/150)

135 (61.2)

550-600

2530615

44.2

45.90

180 (81.6)

440-480

2530616

73.7

100

61.20

180 (81.6)

550-600

2530617

59.0

61.20

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