magicpak MGE4-12 Series, Инструкция по установке и обслуживанию, Страница: 17 / 22

508197-01 Issue 2137 Page 17 of 22
• Cleaning the indoor and outdoor coil if covered with
any foreign material, lint, leaves, or other obstructions.
The condensing coil should be cleaned at a minimum once
per year. In areas subject to high traffic or environmental
conditions which may contain chloride, sulfites, dust,
ammonia, etc., more frequent cleaning is required.
Heating System
Burners
The burners can be removed for cleaning or to change
orifices. To remove the burners:
1. Disconnect electrical service and turn off gas to the
appliance.
2. Remove access panel to burners and gas valve
compartment.
3. Burners can be individually removed from burner
assembly by removing the two screws that hold each
burner in the burner rack.
• Burners can be cleaned using a bottle brush.
•
Orifices are threaded into the gas manifold and can
be removed by unscrewing.
4. Reinstall orifices and burners in the reverse order in
which they were removed. Ensure burners are properly
seated over orifices and properly aligned.
5. Reinstall access panel and turn on gas and electrical
service.
Heat Exchanger
The heat exchanger should be inspected periodically and
cleaned if necessary. If cleaning is necessary, use a stiff
brush with a wire handle to remove scale. While cleaning
the heat exchanger, the vent extension tube should also
be cleaned. Remove the four screws on the combustion
air inducer mounting plate and take out the blower. Use a
brush to clean the vent extension tube.
Blower
Direct-drive blower motors are permanently lubricated and
do not require oiling.
Filters
Inspect the filter once a month. Replace disposable filter or
clean the washable filter as necessary (a minimum of three
times each heating or cooling season is recommended).
To clean the washable filter, shake filter to remove excess
dirt and/or use a vacuum cleaner. Wash filter in soap or
detergent water and replace after filter is dry.
Outdoor Coil
Foreign material should not be allowed to accumulate on
the outdoor coil surface or other parts in the air circuit.
Rollout Switch
If for any reason the heat exchanger were to become
blocked, there is a temperature sensitive switch located
above the burners that will turn off the burners. After
correcting the problem, this switch must be manually reset
by pressing the button on top of it.
Installation and Operation in Extremely Cold
Weather Areas
In areas where extremely cold outdoor temperatures (below
– 20°F) can be expected, some additional installation and
operating precautions should be taken. The following
precautions are designed to prevent possible vent system
ice blockage that could result in safety shutdown of the
burners:
1. Adjust to the highest achievable temperature rise
within the rise and static pressure ranges specified
on the rating plate. Depending on specific model, it
may be possible to change to a lower heating blower
speed tap to get a higher temperature rise. This also
increases comfort.
2. Make sure there are no leaks of outside air into the
return air system.
3. Keep the louver free from ice that may form and
obstruct the flue outlet.
High Altitude
This unit is approved for operation at altitudes from
0 to 5,500 feet above sea level without any required
modifications. For installations above 5,500 feet, refer to
Table 6.
Maintenance
Disconnect all electrical power to the unit before
conducting any maintenance procedures. Failure to
disconnect the power could result in personal injury or
death.
WARNING
Periodic inspection and maintenance normally consists of
changing or cleaning filters and (under some conditions)
cleaning the coils.
Cooling System
The refrigeration system normally requires no maintenance
since it is a closed, self-contained system. Periodic
maintenance is limited to:
•
Cleaning the air filter. Follow directions noted on the
filter and label attached to the access panel.