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Model 1137 Humidifier Installation Manual

Breathe Healthier! Residential Whole House Indoor Air Quality

Maintenance

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, used Vapor Pad

®

 and drain pan.  The Vapor Pad

®

 may be removed 

from either the top or bottom of the humidifier.  Clean excessive mineral deposits from the distributor trough,  drain 
pan and humidifier cabinet.  A solution of 1/2 vinegar & 1/2 water will help loosen mineral deposits.

3.  Insert a new 990-13 (GFI #7002) Vapor Pad

® 

(black notch on top).  Install trough and drain pan.  Replace the 

distributor tube to proper position over the distributor trough. Replace Vapor Pad

®

 yearly for peak performance.

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 from the solenoid valve.  Carefully pull the strainer screen 990-17 
(GFI #7005) from the orifice fitting.  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.  Close air damper.

Parts Drawing

SOLENOID VALVE

ASS'Y 990-53

1137-7 WIRING BRACKET

40-7 TINNERMAN NUT

1137-8 MOTOR

1137-50 COOLING FAN

GA4238 RELAY ASS'Y (FORMERLY 1137-26)

1137-39 FRONT COVER

ASS'Y

1137-3 DRAIN PAN

P-163 HOSE CLAMP

1099-16 DRAIN TUBE

P-103 COMPRESSION NUT

P-104 COMPRESSION SLEEVE

P-111 CONNECTOR

1137-38 CABINET ASSEMBLY

990-37-76 ORIFICE & STRAINER 

ASSEMBLY

990-16-76 ORIFICE FITTING

990-17 STRAINER SCREEN

990-18 STRAINER BODY

1137-2 FAN SHROUD

1137-9 FAN BLADE

1137-20 FAN GUARD

1137-24 DISTRIBUTOR TUBE

1099-9 THUMB NUT

1137-35 TROUGH COVER

1137-4 DISTRIBUTOR TROUGH

990-13 EVAPORATOR PAD

1137-31 POWER SUPPLY CORD

Summary of Contents for 1137 Series

Page 1: ...Commercial installation voids warranty Modification or alteration of product parts installation instructions or local safety codes voids warranty Read our full warranty policy at the end of this docum...

Page 2: ...ont 5 Installing Wiring The Control 5 6 Installation Cont 7 How the Humidifier Works 7 Maintenance 8 Parts Drawing 8 Trouble Shooting 9 FAQ s 10 Warranty Registration Keep a Copy For Your Records 11 L...

Page 3: ...Stable Automotive Grade Plastic Humidistat Models MHX3C Included Voltage 120V In Box Humidifier humidistat Installation Instructions Vapor Pad Parts Kit Water Tube Kit Humidistat Wire Drain Pan Power...

Page 4: ...dle counterclockwise to open saddle valve leave open for several seconds to flush dirt from pipe and tubing Steel Brass Hard Plastic Pipe 1 Shut off water supply and drain pipe 2 Turn handle clockwise...

Page 5: ...screws Low voltage wire may enter the humidistat under the foam seal 5 Connect wires to screw terminals on the control assembly as shown in wiring diagram Replace housing 6 MHX3C Mounting On The Retur...

Page 6: ...ff switch in series with the hot wire WARNING CHECK WITH LOCAL AUTHORITIES FOR COMPLIANCE WARNING ALL WIRING SHOULD COMPLY WITH LOCAL ELECTRICAL CODES FIG 6C AIR PRESSURE SWITCH WITH TWO SPEED BLOWER...

Page 7: ...id 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 o...

Page 8: ...ner screen 990 17 GFI 7005 from the orifice fitting 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 orific...

Page 9: ...changed replaced your Vapor Pad at the proper intervals once per year to ensure the greatest production of moisture Check the setting of your humidistat to ensure it is set higher than current humidit...

Page 10: ...gile The coating is similar in composition to the minerals that accumulate on the pad If you subject the Vapor Pad to cleaning you usually remove much of the coating and the pad becomes ineffective Th...

Page 11: ...Labor involved in diagnostic calls or in removing repairing servicing or replacing parts is not covered under this Limited Warranty Shipping charges are not covered by this Limited Warranty Agreement...

Page 12: ...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 al...

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