This product must be installed by a qualified heating and air conditioning contractor. Failure to do so could result in serious injury from electrical shock.
This product must be installed in compliance with all local, state and federal codes.
ATTENTION INSTALLER:
READ COMPLETE SAFETY INSTRUCTIONS AND INSTALLATION TEMPLATE BEFORE STARTING
FAN POWERED HUMIDIFIER MODEL EHUMD500A
24V
ODT
H
C
R
24 VAC TRANSFORMER (10 VA MINIMUM)
SHUT-OFF
(SADDLE VALVE)
WATER SUPPLY
CORD & PLUG
TO 120 VAC 60 Hz
POWER SUPPLY
CONNECT DRAIN
LINE HERE
BROWN WIRES
NORTH, EAST
OR WEST SIDE
OF HOME
OUTDOOR
TEMPERATURE
SENSOR
ABOVE EXPECTED
SNOW LINE
NOTE:
FOR INSTALLATION IN MANUAL MODE,
REPLACE OUTDOOR TEMPERATURE
SENSOR WITH PLASTIC RESISTOR
CASE AND ATTACH MANUAL FACE
PLATE. SEE “INSTALLER’S
GUIDE /AUTOMATIC HUMIDIFIER
CONTROL, FORM #18-CH31D1-3”
INCLUDED WITH EACH HUMIDIFIER.
W1
B/C
POWER
BYP
ASS
NOTE
VERIFY THAT SWITCH IS IN
THE “BYPASS” POSITION.
INSTALLATION OPTIONS
Typical Installation
Alternate Installation
COOLING COILS IN
WARM AIR PLENUM
If humidifier is to be mounted
adjacent to cooling coils, install
as shown in relation to coil.
WIRING DIAGRAM
(SEE STEP 7 ON BACK AND
“INSTALLER’S GUIDE / AUTOMATIC HUMIDIFIER CONTROL, FORM #18-CH31D1-3”
FOR DETAILED WIRING INSTRUCTIONS)
90-922
90-1139
RETURN
RETURN
HOT WATER
SUPPLY
SUPPLY
Orientation of Humidifier
to Cooling Coils
WARNING
1.
ELECTRICAL SHOCK HAZARD.
120 VAC may cause serious injury from
electrical shock. Disconnect electrical power
to the furnace before starting installation.
Failure to do so could result in serious injury
from electrical shock.
2.
SHARP EDGES HAZARD.
Sharp edges
may cause serious injury from cuts. Use care
when making plenum openings and handling
ductwork. Use personal protective equipment
when installing or servicing HVAC equipment.
3.
RISK OF SCALDING.
Water temperature
over 125°F can cause severe burns and scald
instantly. Shut off the hot water supply before
disconnecting or tapping into any hot water
supply line.
SPECIFICATIONS
HUMIDIFIER DIMENSIONS
Width 15
29
⁄
32
”
Height
(including solenoid valve
and drain spud)
18”
Depth 10
11
⁄
32
”
PLENUM OPENING
14
3
⁄
4
”W x 14
5
⁄
16
”H
WATER FEED RATE
6 gph
ELECTRICAL DATA
120 VAC-60 Hz, 0.8 AMP
CAUTION
1. Do not install in attic or crawl areas.
2. Do not install humidifier where freezing temperatures
could occur. The water line could freeze and crack
causing water damage to the home.
3. Do not install humidifier on the furnace cabinet.
4. Do not install humidifier on a plenum face where the
blanked off ends of the cooling coil will restrict air
movement through the humidifier.
5. Do not set humidity level above recommended or to
recommended level if condensation exists on inside
windows of any unheated space, as condensation
damage may result. Excess humidity can cause moisture
accumulation which can allow the possibility for mold
growth in the home.
6. Do not connect the humidifier power cord to multi-speed
furnace blower motors or blower motors other than 120
VAC. Premature component failure may result.
7. When installing Humidifier Control on a downflow
furnace, ensure blower continues to run after a heat call
is satisfied to eliminate high temperatures from damaging
the Control.
8. Do not install humidifier where water pressure exceeds
125 psi, since damage to the humidifier may result. Follow
codes in effect concerning pressure reduction.
9. Do not install humidifier on the supply plenum where
static pressure exceeds 0.4 in. wg.
RISK OF PROPERTY AND EQUIPMENT DAMAGE.
BLANKED OFF
END OF COIL
NOTES
1. The humidifier is not
suitable for installation
on ducts with horizontal
airflow. Performance will
be reduced. For such
applications, use a Large
Bypass Humidifier.
2. When installing humidifier
on a heat pump system, use
hot water. The heated water
supplements the reduced
supply air temperature as
added heat for evaporation.
3. If fresh air is piped
directly into the return air
duct, it must be installed
downstream of humidifier.
TEMPLATE MUST BE LEVEL
Trane
Ingersoll Rand
6200 Troup Highway
Tyler, TX 75711-9010
90-1138
COOLING
COIL
COOLING
COIL
NOTE:
FOR COMMUNICATING SYSTEM WIRING DIAGRAMS,
SEE ENCLOSED INSTALLER’S GUIDE, FORM 18-HE87D1-3.
