506325-01
Issue 1734
Page 9 of 15
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.
Filter
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).
Do not replace washable filter with a disposable filter
unless an installation was made in which the filter was
mounted exterior to the unit.
Motors
The indoor and outdoor fan motors are permanently
lubricated and require no maintenance.
Outdoor Coil
Foreign material should not be allowed to accumulate on
the outdoor coil surface or other parts in the air circuit.
Cleaning should be as often as necessary to keep the coil
clean. To clean the coil, remove the lower access panel
and blow out debris by using compressed air or water.
Be
sure power to unit is shut off before using water to
clean the coil.
Care should be used when cleaning the coils so that
the coil fins are not damaged.
Outdoor Base Drain
Foreign material should not be allowed to clog the drain
hole. Inspect and clear drain opening prior to heating
season.
System Performance
For maximum performance of this electric cooling system,
the operating temperatures and pressures should be
checked and superheat determined at Standard ARI test
conditions of 82°F outdoor – 80°F indoor dry bulb/67°F
wet bulb. If superheat measured deviates from the values
given in Table 5, refrigerant charge should be adjusted
accordingly for maximum performance.
Table 5. Suction Superheat
Magic-Pak
Model
Suction Superheat @ ARI Conditions
82° OD 80° IDDB/67° IDWB
MHP4-09-12
15-18
MHP4-09-18
9-11
MHP4-09-24
17-19
MHP4-09-30
11-13
MHP4-09-36
23-25
MHP4-10-18
8-10
MHP4-10-24
16-18
MHP4-10-30
24-26
