Mi-T-M HEO Series, Руководство по эксплуатации

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24 Operator's Manual
Maintenance
DeLiMe cOiL:
A loss in pressure may signify that the coil needs to be delimed. Do this pro-
cedure on a periodic basis.
. Mix deliming powder/solution according to package directions.
2. Remove the nozzle from the wand. Place a nylon stocking over the
wand assembly to collect debris, then place the wand assembly into
the float tank.
3. Turn the switch to the "Pump" position. Water will circulate throughout
the system and back into the float tank. Allow circulation to continue
for 2-4 hours.
4. Turn the switch to the "Off" position. Drain and clean the float tank.
Remove nylon stocking and clean wand assembly.
5. Flush the entire system with clean, fresh water, then replace nozzle
into wand assembly.
6. Dispose of deliming solution according to local, state and national
regulations.
TEST VOLTAGE & AMP DRAW: Use a volt meter and amp meter to test the
machine for correct voltage and amperage. If you do not have these instru-
ments or do not know how to use them, this procedure should be performed by
an authorized service technician.
fueL fiLter/Water separatOr:
Inspect bowl on fuel filter/water separator for water accumulation. If water ex -
ists, unscrew drain valve on bowl to drain water, then close.
Burner air aDJustMent:
The air shutter has been factory preset for proper operation between sea level
and 2000 feet elevation at standard conditions (60°F ambient water and air
temperatures). In colder temperatures or higher altitudes, it may be neces -
sary to adjust the air supply to the combustion chamber. This adjustment will
maximize burner efficiency and avoid inefficient operation or excessive sooting
of the heat exchanger coil. A smoke spot test is recommended during any air
shutter and band adjustment. If you do not have the equipment to perform a
smoke spot test, follow the procedures listed below.
. The machine must be running and the burner ON.
2. Loosen the Locking Screw (#3 on illustration #5) on the shutter.
3. Check for smoke from the heat exchanger exhaust. If smoke is
not present, slowly close the Air Shutter (#1 on illustration #15)
by moving the dial counterclockwise to a lower number. Continue
moving the dial until smoke appears.
4. Record this setting.
5. Open Air Shutter (# on illustration #5) two increments. Example:
If Air Shutter was set at 2, move it to 4.
6. Slowly trigger the gun on and off. This will cause the burner to turn
on and off. Look for a smoke puff when the burner ignites.
7. Repeat steps 5 and 6 until a smoke puff is noticed. Record the Air
Shutter Setting.
8. The difference between the recorded settings in steps 4 and 7 is the
combustion window. Set the dial /2 way between these settings.
nOTE: If you are unable to detect a setting on either step 3 or 7, more or less
air may be needed to achieve a proper combustion window. Loosen
the Bolt (#4 at left) and open the Air Band (#2 on illustration #5 ) in
1/4" increments. Repeat steps 3-8 until proper combustion window is
achieved.
test Water & fueL pressure:
These procedures should be performed by an authorized service technician.
test Water teMperature:
This procedure should be performed by an authorized service technician.
iLLustratiOn #15
Burner air aDJustMent