Maytag mde-mdg21pra ユーザーズマニュアル
16
16022904 Rev. 0
©2004 Maytag Appliances Company
Troubleshooting Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death, disconnect power to unit before servicing, unless testing
requires power.
requires power.
Manometers
Insufficient gas flow can cause problems. Therefore,
checking the gas pressure at the time service calls are
performed may prevent a return call.
checking the gas pressure at the time service calls are
performed may prevent a return call.
Gas pressure can be checked with an instrument called a
"manometer." This device can detect a "low" LP tank,
restricted gas flow, bad gas valve, a malfunctioning
pressure regulator, too many gas appliances operating off
of a small supply line, or an improperly converted
appliance from Natural to LP gas.
"manometer." This device can detect a "low" LP tank,
restricted gas flow, bad gas valve, a malfunctioning
pressure regulator, too many gas appliances operating off
of a small supply line, or an improperly converted
appliance from Natural to LP gas.
Other types of manometers exist; however, the type of
manometer we will discuss in this manual is a "U" shaped
tube in which water is added. Both ends are open so the
water can equalize and seek its own level, which will be
the same in both arms of the "U" shaped tube.
manometer we will discuss in this manual is a "U" shaped
tube in which water is added. Both ends are open so the
water can equalize and seek its own level, which will be
the same in both arms of the "U" shaped tube.
A flexible rubber hose is connected to the lower, open end
of the manometer and to the gas source. Gas pressure is
exerted on one of the water columns, pushing it down.
The water level then rises in the other column. The
difference in water levels equals the measure of gas
pressure.
of the manometer and to the gas source. Gas pressure is
exerted on one of the water columns, pushing it down.
The water level then rises in the other column. The
difference in water levels equals the measure of gas
pressure.
The water column (W.C.) for a Maytag dryer is 3.5" W.C.
for Natural gas and 11" W.C. for LP.
for Natural gas and 11" W.C. for LP.
How to Use:
1. Disconnect power supply to unit.
2. Remove front panel.
3. Shut off the gas to the dryer.
1. Disconnect power supply to unit.
2. Remove front panel.
3. Shut off the gas to the dryer.
4. Install a 1/4" tapered fitting at the gas valve pressure
tap. Use thread seal tape or compound on fitting.
5. Fill the manometer tube with water until each side
equalizes at "0" water column.
6. Push the end of the manometer hose onto the 1/4"
fitting located on the gas valve.
7. Connect hose to one end of the manometer.
8. Turn on the gas and reconnect dryer to power. Run
8. Turn on the gas and reconnect dryer to power. Run
the dryer in a heat cycle. Read the manometer with
the burner ON, (check for gas leaks).
the burner ON, (check for gas leaks).
9. When the gas is on, the amount of water column
present is equal to the total amount of deflection
shown in the manometer.
shown in the manometer.
Note:
Once the test is completed, make sure the
tapered fitting is removed from the gas valve and
the plug is repositioned into the gas valve and
resealed with pipe seal. Check for gas leaks
again with a soap or bubble solution. NEVER
USE OPEN FLAME TO CHECK FOR GAS
LEAKS.
the plug is repositioned into the gas valve and
resealed with pipe seal. Check for gas leaks
again with a soap or bubble solution. NEVER
USE OPEN FLAME TO CHECK FOR GAS
LEAKS.
Note:
IF HIGH WATER COLUMN PRESSURE IS
DETECTED; the gas flame can damage the
flame spreader on the burner. (this can be
cuased by the wrong orfice, improper air mixture
or high gas pressure. If pressure is as high as
suspected, contact the local gas utilities
company to check the outside regulator.)
flame spreader on the burner. (this can be
cuased by the wrong orfice, improper air mixture
or high gas pressure. If pressure is as high as
suspected, contact the local gas utilities
company to check the outside regulator.)
Gas Valve
Valve
Pressure Tap
Pressure Tap
Orfice