Duct Mounted Atomizing Humidifier
Mister-MINI TM
Table of Contents
Introduction 2 Specifications 2 Capacity Selection Chart 3 Output Capacity 4 Installation
Location Selection 5 Mounting 6 Wiring 7 & 8 Plumbing 8 Start-up & Operation 9
Maintenance
To Clean and Inspect 10 To Check for Leaks 10 To Clean Spray Nozzle 11 To Clean Solenoid Valve 12
Unit Diagram and Parts List 13 Warranty 15
Caution: Read this manual carefully and completely before installing this product. Installation and maintenance should be completed by qualified personnel.
265240-001 09/11
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 can 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 infiltrates the home and must be 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 furnishings in the home.
Specifications
Model |
Mister-MINI |
|
Type of Unit |
Atomizing/Evaporative |
|
Duct Position |
Supply Duct |
|
GPD @ 140°F |
12.5 Gallons per day @ 60 psi |
|
GPD @ 120°F |
12.5 Gallons per day @ 60 psi |
|
GPD @ 100°F |
Not Recommended for Temperatures <120°F |
|
Voltage |
24 VAC |
|
Unit Dimensions |
4.25"W x 3.88" D x 4.25" H |
|
Duct Opening |
3.125" W x 3.125" H |
|
Shipping Weight |
3 lbs |
|
What's in the box |
(1) |
Humidifier |
|
(1) |
Wall/Duct Mount Humidistat |
|
10' Plastic Water Line |
|
|
(1) |
Instruction Manual |
|
(1) |
Mounting Template |
Features |
Two Year Warranty |
|
2
Capacity Selection
The table below is for reference only and is based upon the following:
Inside temperature of 70°F / 35% relative humidity Outside temperature of 20°F / 70% relative humidity
8 foot ceiling height
Internal moisture gain of one pound per hour
Furnace on-time 70%
The chart uses Standard ASHRAE definitions:
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 changes 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
Sq. Footage of |
Tight Home |
Average Home |
Loose Home |
Home |
(GPD) |
(GPD) |
(GPD) |
1000 |
0.5 |
5.0 |
10.0 |
1500 |
3.0 |
10.0 |
16.5 |
2000 |
5.0 |
14.0 |
24.0 |
2500 |
7.5 |
19.0 |
30.5 |
3000 |
10.0 |
23.5 |
37.5 |
4000 |
14.5 |
33.0 |
51.5 |
3
Output Capacity
Increasing or decreasing the nozzle size or supply water pressure can vary the output capacity of this humidifier. It is recommended that the humidifier NOT be used with water pressures below 40 PSI, otherwise, the mist may be adversely affected.
This humidifier comes standard with a .75 GPH (oil) nozzle with a hollow spray pattern. Alternatively sized nozzles may be purchased from your local HVAC supply house or plumbing supply outlet. If the water pressure fluctuates or is excessive,
a pressure regulator should be installed in the water line supplying the humidifier.
The following chart illustrates the capacity of different nozzles at varying water pressures. The capacity listed on the nozzle is for #2 fuel oil at 100 psi and should not be considered relative to the water capacity of this humidifier.
Nozzle |
|
|
|
Nozzle Size |
|
|
|
|
|
Pressure |
0.4 |
0.5 |
0.75 |
|
1 |
||||
(PSI) |
GPH |
GPD |
GPH |
GPD |
GPH |
GPD |
GPH |
GPD |
|
40 |
0.23 |
5.5 |
0.28 |
6.8 |
0.43 |
10.2 |
0.57 |
|
13.7 |
45 |
0.24 |
5.8 |
0.30 |
7.2 |
0.45 |
10.9 |
0.60 |
|
14.5 |
50 |
0.25 |
6.1 |
0.32 |
7.6 |
0.48 |
11.5 |
0.64 |
|
15.3 |
55 |
0.27 |
6.4 |
0.33 |
8.0 |
0.50 |
12.0 |
0.67 |
|
16.0 |
60 |
0.28 |
6.7 |
0.35 |
8.4 |
0.52 |
12.5 |
0.70 |
|
16.7 |
65 |
0.29 |
7.0 |
0.36 |
8.7 |
0.54 |
13.1 |
0.73 |
|
17.4 |
70 |
0.30 |
7.2 |
0.38 |
9.0 |
0.56 |
13.6 |
0.75 |
|
18.1 |
75 |
0.31 |
7.5 |
0.39 |
9.4 |
0.58 |
14.0 |
0.78 |
|
18.7 |
80 |
0.32 |
7.7 |
0.40 |
9.7 |
0.60 |
14.5 |
0.80 |
|
19.3 |
85 |
0.33 |
8.0 |
0.41 |
10.0 |
0.62 |
14.9 |
0.83 |
|
19.9 |
90 |
0.34 |
8.2 |
0.43 |
10.2 |
0.64 |
15.4 |
0.85 |
|
20.5 |
95 |
0.35 |
8.4 |
0.44 |
10.5 |
0.66 |
15.8 |
0.88 |
|
21.1 |
100 |
0.36 |
8.6 |
0.45 |
10.8 |
0.68 |
16.2 |
0.90 |
|
21.6 |
NOTE: Due to the operation cycle of the furnace and humidifier, it may take from 2-5 days to reach the proper humidification level.
4
When selecting a location for the installation of your humidifier, certain conditions must be met for its proper operation. The recommended location for this humidifier is on the warm air supply plenum, approximately 3 inches downstream of the furnace discharge. The air temperature must be at least 120ºF in order for the temperature switch to operate properly. In narrow plenum/duct arrangements, the humidifier should be mounted on the narrow side of the duct. Select a location so that the spray from the nozzle will not impinge on the furnace fan, control switches, air conditioning or heat coils, or walls of the duct.
The humidifier should be mounted so that the furnace air carries the mist away from the humidifier temperature switch. The direction of airflow is indicated inside of the humidifier housing and on the rating label on the side of the humidifier.
DO NOT install the humidifier where freezing conditions could occur or where accidental overflow could cause water damage to the home or property.
DO NOT install the humidifier where the temperature will exceed 180°F. Excessive heat may cause softening and distortion of the plastic housing.The installation of a water filter may reduce the potential clogging of the nozzle and solenoid valve in hard water applications.
Installation
Supply Plenum
Nozzle 
Temperature
Switch
Furnace
Supply Plenum
Nozzle Temperature
Switch
Furnace
Supply Plenum
Temperature
Switch
Nozzle
Furnace
5
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