Nortec GSP Indoor, GSTC Indoor, GSTC Outdoor User Manual

GS Series

GSTC/GSP Indoor
GSTC Out door

Engineering Manual

1503540-C

PROPRIETARY NOTICE

This document and the information disclosed herein are proprietary data of WALTER MEIER LTD.
Neither this document nor the information contained herein shall be reproduced used, or disclosed to
others without the written authorization of WALTER MEIER LTD., except to the extent required for
installation or maintenance of recipient’s equipment. All re ferences to the NORTEC name should be
taken as referring to WALTER MEIER 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 2008, WALTER MEIER LTD. All rights reserved.

RECORD OF REVISIONS

For each revision, put the revised pages in your manual and disca rd the superseded pages. W rite the
revision number and revision date, date put in manual, and the incorporator’s initials in the applicable
columns on the Record of Revisions.

Revision

Number

Revision

Date

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In Manual By

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2008-10-01

TABLE OF CONTENTS

Subject Page

10-00 PRINCIPLE OF OPERATION

1. PRINCIPLE OF OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

A. COMBUSTION SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

10-10 OPERATION

1. WATER MANAGEMENT - BETTER EFFICIENCY THAN EVER . . . . . . . . . . . . . . . . . . . . . . . . . . 8

A. INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

B. SAFETY WATER LEVEL CONTROL CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

C. SELF DIAGNOSTIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

D. ENERGY EFFICIENT BLOWDOWN SEQUENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

E. INTERNAL DRAIN WATER TEMPERING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

F. CAPACITY TURN DOWN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

G. GSTC UNIT NEWTWORKING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

2. CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

A. INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

B. REMOTE FAULT INDICATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

C. MODULATING CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

D. ON/OFF CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

3. ELECTRICAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

4. VENTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

5. CLEARANCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

6. STEAM INSTALLATION GUIDELINES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

7. CALCULATION OF ANNUAL OPERATING COSTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

A. NATURAL GAS HUMIDIFIER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

B. ELECTRIC GAS HUMIDIFIER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

C. OPERATING COST SAVINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

10-20 MAINTENANCE

1. WATER CONDITIONS VS. HUMIDIFIER CLEANING REQUIREMENTS . . . . . . . . . . . . . . . . . .18

2. PREVENTIVE MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

3. PRE-CLEANING SEQUENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

10-30 OPTIONS & ACCESSORIES

1. OPTIONS AND ACCESSORIES AVAILABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

A. NORTEC MODULATING HUMIDISTAT WITH DIGITAL DISPLAY . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

B. HUMIDISTAT WITH INTEGRAL SENSOR AND CONTROLLER WITH DIGITAL DISPLAY . . . . . . . . . 22

C. HUMIDISTAT WITH INTEGRAL SENSOR. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

D. NORTEC ON/OFF CONTROLS WITH DIGITAL DISPLAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

E. CONFIGURATION OPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

F. DIRECT VENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

G. STAND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

H. KEEP WARM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

I. INDOOR FREEZE PROTECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

J. OUTDOOR FREEZE PROTECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

2008-10-01

K. ON-LINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

L. LINKS 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

M. OUTDOOR 120 VAC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

N. DRAIN WATER SUMP PUMP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

O. STEAM DISTRIBUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

P. REMOTE MOUNTED BLOWER PACK. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

Q. SHORT ABSORPTION MANIFOLD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

10-40 SPECIFICATION

1. GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

A. QUALITY ASSURANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

B. SUBMITALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

C. EXTRA MATERIALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

D. REFERENCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

E. COORDINATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

2. PRODUCTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

A. GAS FIRED STEAM HUMIDIFIER - GSTC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

3. EXAMINATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

A. EXAMINATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

B. INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

C. TESTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

D. TRAINING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

WARRANTY

2008-10-01

LIST OF FIGURES

Figure Page

10-00 PRINCIPLE OF OPERATION

Figure 1. GS Indoor Series. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Figure 2. GS Outdoor Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Figure 3. GSTC Key Pad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Figure 4. GSP Key Pad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

10-10 OPERATION

Figure 1. Humidifier Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Figure 2. Physical Dimensions - GS Indoor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Figure 3. Physical Dimensions - GS Outdoor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 4. GSTC / GSP Indoor Clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 5. GSTC Outdoor Clearance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

10-30 OPTIONS & ACCESSORIES

Figure 1. NORTEC LINKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

Figure 2. NORTEC OnLine. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

Figure 3. Steam Distributor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

Figure 4. Blower Pack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

Figure 5. Short Absorption Manifold. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

2008-10-01

LIST OF TABLES

Table Page

10-00 PRINCIPLE OF OP ERA T ION

Table 1. Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Table 2. Standard Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

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PRINCIPLE OF

OPERATION

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1. PRINCIPLE OF OPERATION

A. Combustion System

(1) The combustion system is based on a fully modulating forced draft combustion air

blower, a negative pressure regulated gas valve, and a 100% premix burner. On a
call for humidity, the combustion air blower starts and creates a negative pressure
across an orifice located at the air inlet.

(2) The blower is energized to purge the system, then the hot surface igniter is activated.

During this time the electronic ignition module does a diagnostic check of safety
systems including the air-proving switch, which senses the negative pressure at the
air inlet orifice. After the function of the safety systems has been verified, the gas
valve will open and the gas/air mixture is ignited by the hot surface igniter.

(3) If a flame is sensed by the flame sensor, the gas valve remains open and

combustion continues. If a flame is not sensed, the above sequence is repeated to a
maximum of three times after which the ignition module will lock out. The gas valve
maintains a constant ratio air to gas independent of blower speed or external
conditions. This air and fuel is thoroughly mixed in the blower and then forced
through the burner ports where ignition occurs.

(4) Hot products of combustion are forced through a baffle inside the heat exchanger

and then vented outside. The heat exchanger has a large flat surface to minimize
scale build-up and promote scale shedding to the bottom of the tank. This self­cleaning action helps to maintain the efficiency of the heat exchanger while the
smooth surfaces allow for easy cleaning when necessary.

(5) The GS 100 has a single removable combustion chamber/heat exchanger. The

combustion system is duplicated on larger units with multiple chambers inside a
common tank.

Table 1. Technical Data

SPECIFICATION GS 100 GS 200 GS 300 GS 400

Rated Capacity: lbs/hr* 25-105 25-210 25-315 25-420
Rated Capacity: kg/hr* 11-48 11-95 11-143 11-191
Input BTU/hr max 140,000 280,000 420,000 560,000
Input kJ/hr max 41 82 124 165

UNIT TYPE

GS 500

25-525
11-238
700,000
206

GS 600

25-630
11-286
840,000
247

Flue Emissions Low CO (< 10 ppm) and Low (NOx <40 ppm)
GSTC/GSP Rated Amps 1.1 1.9 2.7 3.5
Voltage/Phase 208-240/1 Standard
GSTC Outdoor Rated Amps 3.2 4.0 6.9 7.7
Voltage/Phase 208-240/1 Standard
GSTC/GSP Rated Amps 2.1 3.7 5.3 6.8
Voltage/Phase 120/1 Standard
GSTC Outdoor Rated Amps 6.3 7.4 13.7 15.2
Voltage/Phase 120/1 Standard

4.3

10.6

8.4

21.0

2008-10-01

5.2

11.5

10

22.6

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Figure 1. GS Indoor Series

Figure 2. GS Outdoor Series

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Figure 3. GSTC Key Pad

Figure 4. GSP Key Pad

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Page 4

2008-10-01

Table 2. Standard Features

Standard Features GSTC GSP*

Steam Capacity adjustment x
Full size alphanumeric display and keypad x
Total Controller with Modbus host protocol x
Transducer signal acceptance x
Individual component diagnostic capability x
Keypad set-point adjustment (humidity) x
Display of relative humidity x
Low and high relative humidity alarms x
Adjustable drain with no call for humidity x
Keep warm feature x
Networking capability up to 10 units x
Pre-cleaning sequence x
Troubleshooting Guide x
Self diagnostic capabilities x
Fault history x
Smart drain water cooling x
On/off cycling prevention x
Full tank blowdown capability via timer or external trigger x x
Board mounted display for fault and demand indication not req. x
Parameter change through jumper settings keypad x
Remote fault indication x x
Single or Dual modulation signal acceptance x x
Industry standard modulation signal acceptance x x
Time to next maintenance alarm x x
Internal Drain water cooler x x
System demand indication x x
Output display x x
Precise five level water level indication x x
Status indicator lamps x x
Backlit display x x
B or BH venting options x x
BH stack vent (outdoor only) x
Large Side tank cleaning port x x
Top access cleaning (300, 400, 500 & 600 lb models) x x
Single water connections x x
Turn-down ratio from maximum output to 25lbs/hr(11kg/hr) x x
Time proportioning below 25lbs/hr(11kg/hr) x x
120V or 208-240V power supply x x
Freeze Protection (Outdoor only) See Section 10-30, Page 24. x
Integral enclosure (outdoor only) x
Nortec Links Building Management System capable using BACnet
or LonWorks N2 protocols
Nortec OnLine for web based monitoring and control o
Sealed combustion / Direct vent o o
Floor stand o o
Distribution Systems
Short Absorption Manifold SAM-e o o
Steam Distributor o o
Blower Pack o o
x = standard o = optional

o o

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