General Filters DS15P, DS25, DS25LC Installation Manual

General Filters

Incorporated

Installation & User Manual – Duct Models

FORM NO. 25-32; Rev. A

General Filters

Incorporated

1 | P a g e

1. Duct Steam Humidifier

2. Installation manual

3. Mounting template

4. Installation Kit
a. Steam nozzle

b. 6’ Steam hose
c. 9’ Condensate hose
d. Water tube supply kit (10’ tubing)
e. Water fill connector
f. GFX3 Automatic Humidistat
g. Ball valve
h. Air proving pressure switch
i. Hose clamps
j. Fasteners

Unlatch the cylinder clamp

Remove shipping block

before installing

Remove zip tie

before installing

General Filters

Incorporated

2 | P a g e

Before installing or handling the humidifier please carefully read and follow the instructions and safety
standards described in this manual and on the labels attached to the Elite Steam Humidifier. Test
water conductivity prior to model selection or installation.

: DISCONNECT THE MAIN POWER BEFORE OPENING OR SERVICING THE HUMIDIFIER!

: ELECTRIC SHOCK HAZARD! The humidifier has components that are under power!

: SCALDING HAZARD! The humidifier has hot parts (212°F / 100°C).

: Your humidifier requires water to operate. DO NOT mount it above materials or machinery that
could be damaged if a leak occurs. General Filters, Inc. assumes no responsibility for consequential or
inconsequential damage as a result of any leaks.

: DO NOT introduce steam into duct that has interior insulation.

:

• Install the humidifier out of the reach of children.

• The humidifier must be installed in accordance with all local and national standards.

• All service and/or maintenance operations must be performed by qualified personnel who are aware of the

necessary precautions and are capable of performing the operations correctly.

• The conditions of the environment and the power supply voltage must comply with the specified values listed
on the data label in the humidifier.

• All other uses and modifications made to the humidifier that are not authorized by the manufacturer are
considered incorrect, and the manufacturer assumes no liability for the consequences of any such unauthorized
use.

: Before Beginning Installation:

• Check for shipping damage to cartons. Mark the shipping waybill accordingly.

• Open cartons and check for any hidden damage. Mark the shipping waybill accordingly.

• Check packing slip to ensure all items have been received. Notify General Filters, Inc. of any shortages or

damaged parts.

You must notify General Filters, Inc. within 5 working days of any shortages.

: Disposal of the parts of the humidifier:

• The humidifier is made up of metallic and plastic parts.

• All parts must be disposed of according to the local standards on waste disposal.

General Filters

Incorporated

3 | P a g e

TABLE OF CONTENTS

1. How The Elite Steam Humidifier Works 4

1.1 Basic Operation 4

1.2 Cylinder Life 5

1.3 Calculating Humidity Load 5

2. Models 6

3. Installation 7

3.1 Positioning 7

3.2 Mounting / Unit Dimensions 7

3.2 Fastening to The Wall 8

3.3 Plumbing 9

3.4 Steam Distribution 10

3.4 Installing the Steam Manifold 11

3.2 Correct Manifold Installation Digram 12

3.5 Power Wiring 13

3.6 Control Wiring 13

3.2 Control Wiring, Cont. 14

3.7 Wiring Connections 15

4. Start-Up 16

4.1 Startup Checklist 16

4.2 The Elite Steam Humidifier Controller 16

4.3 Starting The Elite Steam Humidifier 16

4.4 Starting With A New Cylinder 16

5. Operating The Elite Steam Humidifier 17

5.1 Displaying Information 17

5.2 Selecting Signal Type 17

5.2 Changing The Maximum Production 17

5.3 Activating Manual Drain 17

5.4 Resetting The Hour Counter 18

5.5 Using The GFX3 Humidistat 18

5.6 Alarms 19

6. Trouble Shooting 20

7. Maintenance 21

7.1 Periodic Checks 21

7.2 Cylinder Maintenance 21

7.3 Replacement Parts 22

8. Technical Specifications 23

9. Limited Warranty 24

10. Remote Mount Blower Instructions 26

General Filters

Incorporated

4 | P a g e

1. HOW THE ELITE STEAM HUMIDIFIER WORKS

1.1 Basic Operation

The Elite Steam Humidifier is an electrode humidifier. Unlike heating

elements, electrode steam humidifiers produce steam for humidification
by passing electric current through the water between metal electrodes
inside the plastic steam generator cylinder. Steam output is directly
proportional to the conductivity of the water and the amount of electrode
immersed in the water. Test the water prior to installation with a
conductivity tester (use GFI #5539 or CGF #GF-AP-2 or similar).

On a call for humidity, the Elite Steam controller will open the water fill
valve (1) and allow water to enter the cylinder. A flow restrictor (4)
prevents the unit from filling too quickly or with too much pressure. The
water flows up the fill tube (2) and into the fill cup (3). Water then flows
over the dam in the fill cup (3), which creates a 1” air gap to prevent
backflow of contaminated water into the feed lines, through the fill tube
(6) and into the bottom of the steam cylinder (5). Any backflow or
overflow of water travels through the overflow hose (13) to the drain.

As the water fills the cylinder, it will reach the electrodes (7) and electrical current will begin to flow. As the water continues to
fill the cylinder, the current will increase. This is monitored by an amperage transformer connected to one of the power wires
located on the electronic controller. When the desired current is reached, the fill valve will close (1) and the water will then
begin to warm and produce steam. If the water reaches the cylinder full probe (9) or if current rises too much, the drain pump
(11) will be activated to drain away some water and reduce the current flow to acceptable levels. Note that any time the drain
pump is activated, the tempering valve (10) will be opened for tempering the hot drained water down to 140°F / 60°C in
accordance to local and national standards (See Figure 1.a.).

Periodically, based on the incoming water conductivity, the unit will activate the drain pump (11) and drain water to reduce
mineral concentration. Every 120 hours the unit automatically drains to remove mineral sediment on the bottom of the cylinder.
A strainer (12) in the cylinder helps to prevent mineral debris from jamming the drain pump (11).

If the Elite Steam Humidifier remains powered but idle (i.e. without producing steam) for more than 72 hours (3 days), the
cylinder will automatically be emptied of water and will not refill until the unit is restarted. If there is no water in the cylinder,
there will be no current flow and no steam production.

The electrodes do not burn out, but they will eventually become completely coated with mineral and the cylinder will then need
to be replaced. Cleaning cylinders may cause electrode damage, therefore voiding its warranty. See 7.2.2 maintenance section
on page 21.

No.

Description

A

Steam Generator Cylinder

B

User Interface/Display

C

ON/OFF Switch

D

Fill & Tempering Valves

E

Drain Pump

Table 1.a

F

Figure 1.a.

Figure 1.b

E

D

C B A