Carrier Dehumidifier P707 User Manual

INSTALLATION  
AND OPERATION  
INSTRUCTIONS  
P707  
Dehumidistat  
Part Number P707-MDEH1  
cause of structure damage and IAQ problems such as mold  
and mildew.  
SAFETY CONSIDERATIONS  
Installing, starting up, and servicing equipment can be haz-  
ardous due to system pressures, electrical components and  
equipment location (roofs, elevated structures, etc.). Only  
trained, qualified installers and service mechanics should  
install, start up, and service this equipment.  
When working on the equipment, observe precautions in the  
literature and on tags, stickers, and labels attached to the  
equipment.  
INSTALLATION  
NOTE: For technical assistance, call 1-800-747-1762.  
To install the dehumidistat, perform the following  
procedure:  
1. Determine the mounting location for the dehumidistat.  
Location should be in an easily accessible area. Do not  
locate where humidity sensor could be affected by  
direct humidity sources.  
2. All controls are low voltage. Use 22 to 26 gage field-  
provided wire.  
3. Connect two wires to the DEHUM terminals on venti-  
lator. See Fig. 2. Polarity does not matter. Either wire  
can be connected to either terminal.  
4. Run wire to mounting location. Do not run control  
wire with power wiring. Interference from power wir-  
ing can cause changes to control signal.  
Before installation, always check to be sure main power to  
systems are OFF. Electrical shock can cause personal  
injury or death.  
GENERAL  
The MDEH1 dehumidistat is used with Totaline SHR series  
heat recovery ventilators. See Fig. 1. The dehumidistat is used  
to control the indoor humidity level. High humidity is a major  
o
Fig. 1 — Dehumidistat  
Manufacturer reserves the right to  
discontinue, or change at any time,  
specifications or designs without notice  
and without incurring obligations.  
REPLACEMENT COMPONENTS DIVISION  
LITERATURE NUMBER P707-3SI  
REPLACES: New  
© CARRIER CORPORATION 2004 2-04  
PRINTED IN U.S.A.  
CATALOG NUMBER 570-330  
 
LIMITED TWO-YEAR WARRANTY  
TWO-YEAR WARRANTY — This CARRIER CORPORATION product is warranted to be free from defects  
in material and workmanship under normal use and maintenance for a period of two years from the date of  
original installation. A new or remanufactured part to replace the defective part will be provided without  
charge for the part itself, through a qualified servicing CARRIER CORPORATION dealer or service, PRO-  
VIDED the defective part is returned to our distributor. The replacement part assumes the unused portion of  
the warranty.  
THIS WARRANTY DOES NOT INCLUDE ANY ADDITIONAL LABOR ALLOWANCE OR OTHER COSTS  
incurred for diagnosis, repairing, removing, installing, shipping, servicing, or handling of either defective  
parts or replacement parts. SUCH COSTS MAY BE COVERED BY a separate warranty provided by the  
installer.  
LIMITATIONS OF WARRANTIES — ALL IMPLIED WARRANTIES (INCLUDING IMPLIED WARRANTIES  
OF MERCHANTABILITY) ARE HEREBY LIMITED IN DURATION TO THE PERIOD FOR WHICH THE LIM-  
ITED WARRANTY IS GIVEN. THE EXPRESSED WARRANTIES MADE IN THIS WARRANTY ARE  
EXCLUSIVE AND MAY NOT BE ALTERED, ENLARGED, OR CHANGED BY ANY DISTRIBUTOR,  
DEALER, OR OTHER PERSON WHATSOEVER.  
CARRIER WILL NOT BE RESPONSIBLE FOR:  
1. Normal maintenance as outlined in the installation and servicing instructions or owner’s manual including  
replacement of filters or bulbs.  
2. Damage or repairs required as a consequence of faulty installation or application by others.  
3. Failure to start due to voltage conditions, blown fuses, open circuit breakers or other damages due to the  
inadequacy or interruption of electrical service.  
4. Damage or repairs needed as a consequence of any misapplication, abuse, improper servicing, unautho-  
rized alteration, or improper operations.  
5. Damage as a result of floods, winds, fires, lightning, accidents, corrosive atmosphere, or other conditions  
beyond the control of CARRIER CORPORATION.  
6. Parts not supplied or designated by CARRIER CORPORATION.  
7. CARRIER CORPORATION products installed outside the continental U.S.A., Alaska, Hawaii, and  
Canada.  
8. ANY SPECIAL INDIRECT OR CONSEQUENTIAL PROPERTY OR COMMERCIAL DAMAGE OF ANY  
NATURE WHATSOEVER. Some states do not allow the exclusion of incidental or consequential dam-  
ages, so the above limitation may not apply to you.  
Model No.  
Unit Serial No.  
Date of Installation  
Name of Owner  
Installed by  
Address of Installation  
3
 
Manufacturer reserves the right to  
discontinue, or change at any time,  
specifications or designs without notice  
and without incurring obligations.  
REPLACEMENT COMPONENTS DIVISION  
© CARRIER CORPORATION 2004 2-04  
PRINTED IN U.S.A.  
LITERATURE NUMBER P707-3SI  
REPLACES: New  
CATALOG NUMBER 570-330  
 

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