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After installation is completed, the following method must be used to
determine if the exhaust system is acceptable:
1. Connect an inclined or digital manometer between the dryer and the
point the exhaust connects to the dryer.
2. Set the dryer timer and temperature to air fluff (cool down)
and start the dryer.
3. Read the measurement on the manometer.
4. The system back pressure must not be higher than 0.75 inches
of water column. If the system back pressure is less than 0.75
inches of water column, the system is acceptable. If the manometer
reading is higher than 0.75 inches of water column, the system is too
restrictive and the installation is unacceptable.
Although vertical orientation of the exhaust system is acceptable, certain
extenuating circumstances could affect the performance of the dryer:
1. Only the rigid metal duct work should be used.
2. Venting vertically through a roof may expose the exhaust system to
down drafts causing an increase in vent restriction.
3. Running the exhaust system through an area not insulated may cause
condensation and faster accumulation of lint.
4. Compression or crimping of the exhaust system will cause an increase
in vent restriction.
The exhaust system should be inspected and cleaned a minimum of every
18 months with normal usage. The more the dryer is used, the more often
you should check the exhaust system and vent hood for proper operation.
GDZ22-1 manual 10/22/01 11:45 AM Page 16