Mi-T-M Corporation HS Serie Manuel De L'opérateur page 19

4. If sheaves are straight and tension is correct, tighten B1 nut and the four
pump mounting bolts (A).
5. If tension is not correct, repeat steps 6 and 7 until correct alignment and
tension is achieved. Tighten the four mounting bolts (A) when completed.
6. Loosen B2 nut, tighten B2 bolt, tighten B2 nut.
7. Loosen B1 nut, tighten B1 bolt, tighten B1 nut.
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 tempera-
tures or higher altitudes, it may be necessary 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 adjust-
ment. If you do not have the equipment to perform a smoke spot test, follow
the procedures listed below.
1. The machine must be running and the burner ON.
2. Loosen the Locking Screw (#3 at left) on the shutter.
3. Check for smoke from the heat exchanger exhaust. If smoke is not present,
slowly close the Air Shutter (#1 at left) by moving the dial counterclockwise
to a lower number. Continue moving the dial until smoke appears.
4. Record this setting.
5. Open Air Shutter (#1 at left) 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 1/2 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 at left) 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.
MAINTENANCE – EVERY 6 MONTHS
REPLACE FUEL FILTER – Follow the instructions specified on the fuel filter
for correct procedure.
MAINTENANCE – EVERY 12 MONTHS
DELIME COIL – A loss in pressure may signify that the coil needs to de de-
limed. Do this procedure on a periodic basis.
1. Mix non-caustic deliming powder/solution in float tank 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. Ensure the trigger gun is open and start the engine to allow water to circulate
through the system. Allow process to continue for 2-4 hours (Consult
deliming agent package directions for exact time).
Operator's Manual
STORAGE & MAINTENANCE
Burner Air Adjustment
19