Herrmidifier Co G-200-300 User Manual

G-200/300

Duct Mount

Bypass Humidifier

Installation • Operation • Maintenance

CAUTION:
READ INSTALLATION, OPERATION, AND MAINTENANCE

INSTRUCTIONS CAREFULLY FOR SAFE OPERATION.
EXERCISE EXTREME CAUTION WHEN WORKING WITH

ELECTRICITY.

254429-001 9/04

Table of Contents

Introduction ..........................................1

Specifications ........................................2

Capacity Selection Guide......................3

Operation ..............................................3

Installation ............................................5

Mounting Locations ........................6

Maintenance ........................................7

Troubleshooting ....................................9

Description of Parts ............................11

Unit Diagram and Parts List ..............12

Warranty..............................................14

1

Introduction

Introduction

The benefits of a properly humidified environment (35-50%, Relative Humidity) are many. They
include both personal comfort as well as the preservation of furniture, draperies, carpets,
wooden floors and cabinets, paintings, pianos, etc.. Your home will be more comfortable at a
lower temperature (i.e.: 68° F) at 30-40% Relative Humidity (RH) than at 71° to 72° F without
controlled humidity. Since every degree of temperature setback represents about 3% of your
heating costs, this can possibly represent a significant annual savings.

During the heating season, cold air is brought into the home and heated. When heated, this air
dries out and greatly increases its capacity to hold more moisture. By using a humidifier, a source
of water is provided to satisfy this increased moisture holding capability, rather than having it
drawn from our body surface and the surrounding hygroscopic furnishings in the home.

2

Specifications

To improve the efficiency of your humidifier, and to reduce the possibility of a health hazard, it
is recommended that you take the following precautions:

• Follow the manufacturer’s recommended cleaning and maintenance instructions.

• The amount of minerals and other impurities in a water source can vary greatly, therefore the
frequency of cleaning the humidifier also varies.

• During the heating season, check for film or scale build up on the humidifier, evaporator pad,
and all moving parts on a monthly basis and establish a proper cleaning schedule.

• Do not allow film or scale to build up on the unit, evaporator pad, or any moving part which
will reduce the efficiency of the humidifier.

• An algaecide, such as a humidifier cleaning tablet or bacteriostatic liquid/powder, can be used
to combat algae build-up, should it become evident.

• At the end of the winter humidification season, drain and thoroughly clean your humidifier
as part of the summer shut down. Be sure to install a new evaporator pad at the beginning

of the heating season before starting the humidifier.

Like your heating system and air conditioning unit, periodic maintenance and cleaning are
required to ensure the safe and efficient operation of your humidifier.

Model

Type of Unit

Duct mounting

GPD @ 140°

GPD @ 120°

GPD @ 100°

Input voltage required

Unit W x D x H

Duct Opening W x H

Shipping Weight

Standard Equipment

Features

G-200

Flow thru Bypass

Return Supply

16.1 18.7

12.4 14.4

8.2 9.5

24VAC

11 1/2” x 9 1/2” x 16 1/2”

8 5/8” x 10 3/4”

8.1 lbs

G-300

Flow thru Bypass

Return Supply

20.0 23.3

15.4 18.0

11.0 12.8

24VAC

11 1/2” x 9 1/2” x 19 1/2”

8 5/8” x 13 3/4”

8.4 lbs

Wall/Duct Mount Humidistat

Self Piercing Saddle Valve

24V transformer

Right or left hand discharge

Mounts on 14” minimum wide duct

Bypass: Flexible or hard round duct

Single captive screw secures the cover

All brass solenoid valve assembly

Attractive design & finish, neutral beige color

2” deep evaporator pad for greater surface area

Cleanable & replaceable internal water filter
protects the solenoid valve

Specifications

3

Capacity Selection Guide

Operation

This humidifier operates using the evaporative principle in a quiet, efficient and automatic
manner. It is constructed of the highest quality, engineering grade materials to assure superior
performance and durability. This humidifier is controlled so that it operates only when the
furnace blower is operating and the humidistat, which is installed on the cold air return duct or
in your living area, calls for humidity.

When there is a call for humidity, water flows into the distribution tray and trickles down
through the evaporator pad. Warm, dry air is drawn through the evaporator pad, where it
absorbs moisture and is returned to the duct, and is circulated throughout the house. There is
no standing water in this humidifier, thus reducing maintenance and handling. The drain,
located at the bottom of the unit, allows unused water to flush from the humidifier. The drain
water carries away mineral deposits that have been left behind after the evaporation process. A
fluid restrictor located in the evaporator pad supply tubing controls the amount of water
flowing through the humidifier.

Do NOT attempt to control the flow of water by using the saddle valve. It is designed to be
either fully open or closed.

A pad in the distribution tray distributes water evenly between the openings. The distribution
tray should be inspected annually and any plugged holes cleaned (more frequently in areas of
poor water quality).

Sq. Footage of

Home

1000

1500

2000

2500

3000

4000

Tight Home

(GPD)

0.5

3.0

5.0

7.5

10.0

14.5

Average Home

(GPD)

5.0

10.0

14.0

19.0

23.5

33.0

Loose Home

(GPD)

10.0

16.5

24.0

30.5

37.5

51.5

Air Tightness of Home

The above calculations are for reference only and are based on the following

• Inside temperature 70° F/35% Relative Humidity

• Outside Temp 20° F /70% Relative Humidity

• 8 foot ceiling height

• Internal moisture gain of one pound per hour

• Furnace on-time of 70%

This chart uses A.R.I. standard designations:

A “Tight Home” is assumed to be well insulated with vapor barriers, tight storm windows and
doors, and a dampered fireplace. Air exchange rate of .5 changes per hour.

An “Average Home” is insulated and has a dampered fire place, but there are no vapor barriers,
storm doors, or storm windows. Air exchange rate of 1.0 change per hour.

A “Loose Home” is generally one constructed before 1930, has little or no insulation, no storm
doors, storm windows, weather stripping or vapor barriers, and often no effective dampering of
fireplaces. Air exchange rate is as high as 1.5 changes per hour.