GeneralAire 1137 SERIES Legacy - Manual (Page 4)

The operating principle of the humidifier is based on the most efficient
and economical means of evaporating water to the air. The heat
necessary for evaporating water is produced by the furnace.
The water supply to the humidifier is controlled by the electric solenoid
valve. The solenoid valve and humidifier fan are controlled by a
humidistat connected through an isolation relay. The humidistat is
designed for wall mounting in the living area or surface mounting on the
return air duct. ELECTRICAL RATING: 24 VAC/ 60 Hz.
DO NOT SET RELATIVE HUMIDITY TOO HIGH DURING COLD
WEATHER. EXCESSIVE HUMIDITY MAY CAUSE CONDENSATION
ON WINDOWS OR IN WALLS. REFER TO RECOMMENDED
SETTINGS AS DESCRIBED IN THE HUMIDISTAT OWNERS
MANUAL.
Water flows through a strainer, is metered through an orifice to provide
the proper amount of water, and is supplied to the evaporator pad by
the distributor trough. Air from the warm air plenum is pulled through
the wetted evaporator pad by the humidifier fan and returned to the
warm air plenum to be circulated through the living area. Moisture is
evaporated to the air passing through the evaporator pad.
Minerals are not blown into the air stream as occurs in atomizing
humidifiers; they are left on the evaporator pad where a high
percentage is carried off with the waste water.
When the humidifier is installed and operating, no adjustments are
necessary other than setting the control knob on the humidistat to the
desired level of humidification.
To turn the humidifier off, close water supply valve, switch electrical
power off and turn humidistat off.
Your Humidifier is engineered to give helpful and trouble-free humidification. For maximum efficiency the following cleaning procedures should be carried
out at the end of each heating season:
1. Turn off water supply and electrical power to humidifier.
2. Remove water distributor tube, distributor trough, evaporator pad and drain pan. The evaporator pad may be
removed from either the top or bottom of the humidifier. Clean excessive mineral deposits from the distributor trough,
cover, drain pan and humidifier cabinet. A solution of 1/2 vinegar & 1/2 water will help loosen mineral deposits.
3. If the evaporator pad has excessive mineral deposits, replace with a new “990-13” evaporator pad. Install trough
and drain pan. Replace cover and the distributor tube to proper position over the distributor trough.
4. In heavy mineral areas or if the solenoid valve fails to function disconnect the 1/4” water supply line from the
solenoid valve. Remove the brass strainer body (P.N. 990-18) from the solenoid valve. Carefully pull the strainer
screen (P.N. 990-17) from the orifice fitting (P.N. 990-16). Clean the mineral deposits from all parts. If the orifice is
clogged, it may be opened by inserting a small needle. Reinsert the filter into the orifice fitting and screw the brass
strainer body into the solenoid valve.
5. Reconnect the 1/4” water line to the solenoid valve if necessary. Turn on the water supply and check all points for
leakage. The operation of the unit may be checked by starting the furnace. The humidifier operates only when the
furnace blower is running or the burner circuit is energized. The humidifier is now ready for operation.
6. During the summer, turn off water supply and electrical power to humidifier.
CARE AND MAINTENANCE
LIMITED WARRANTY
HOW THE HUMIDIFIER WORKS
This humidifier, if properly registered by the return of the warranty registration card to the manufacturer, is warranted to the consumer against defects in
materials and workmanship for a period of five years from the date of installation. Evaporator pads, water strainers or metering orifices are not covered
by this limited warranty or any other warranties. Any other defective parts will be repaired without charge except for removal, reinstallation and
transportation costs. To obtain repair service under this limited warranty, the consumer must send the defective part or the complete humidifier to the
manufacturer.
THERE ARE NO EXPRESS WARRANTIES COVERING THIS HUMIDIFIER OTHER THAN AS SET FORTH ABOVE, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY EXCLUDED. THE MANUFACTURER ASSUMES NO
LIABILITY IN CONNECTION WITH THE INSTALLATION OR USE OF THIS PRODUCT, EXCEPT AS STATED IN THIS LIMITED WARRANTY. THE
MANUFACTURER WILL IN NO EVENT BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES.
This limited warranty gives you specific legal rights, and you may also have other rights which vary from state to state. Some states do not allow either
limitations on implied warranties, or exclusions from incidental or consequential damages, so the above exclusion and limitation may not apply to you.
Any questions pertaining to this limited warranty should be addressed to the manufacturer. (U.S.A.: The manufacturer has elected not to make available
the informal dispute settlement mechanism which is specified in the Magnuson-Moss Warranty Act.)
GENERAL FILTERS, INC.
NOVI, MICHIGAN 48375-1115
WWW.GENERALAIRE.COM
CANADIAN GENERAL FILTERS, LTD.
SCARBOROUGH, ONTARIO M1R3B7
WWW.CGFPRODUCTS.COM
AT
OUTSIDE
TEMPERATURE
RECOMMENDED
SETTING
-20°F -29°C 15%
-10°F -23°C 20%
0°F -18°C 25%
+10°F -29°C
+20°F - 7°C
30%
35%
+30°F - 1°C 40%