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3.8.
Dry Mode Operation - MWMC and
3WMC
3.8.1. Procedure
1. Press the MODE button to select DRY mode.
2. Press the UP/ DOWN button to select the desired
temperature. The temperature setting range is from 62°F
to 86°F in one degree increments.
NOTE:
The blower is preset at a low speed and cannot be
changed therefore it will get cold and most likely
will over shoot the temperature setting by 6-10
degrees depending on the room size or other
various factors. Also the Follow Me mode does
not operate in this mode. The Follow Me mode is
only available when a return air sensor is utilized.
Typically in most cases the Follow Me mode will
not be sufficient to remove excessive humidity.
NOTE:
In addition, the outdoor units do not have a
humidistat installed therefore they are unable to
determine humidity levels. This product is not
recommend as a main source for dehumidification.
NOTE:
Using this mode will over shoot the temp by 6-8
degrees below what was set for dry mode.
3.8.2. Dry Mode Operation Sequence
When in dry mode operation the unit is actually in cooling
mode with a low speed blower operation. The compressor
will stop when the room temperature is two degrees Celsius
lower than the temperature setting.
However there is a temperature compensation for cooling
mode that is two degrees Celsius. So the unit will stop when
the temperature is four degrees Celsius lower than the room
temperature settings.
NOTE:
Four degrees Celsius is equivalent to 8°F
difference.
3.9.
Test Run - MWMC and 3WMC
Only perform test run after you have completed the following
steps:
•
Electrical Safety Checks – Confirm that the unit's
electrical system is safe and operating properly
•
Gas Leak Checks – Check all flare nut connections
and confirm that the system is not leaking
•
Confirm that gas and liquid (high and low pressure)
valves are fully open.
3.9.1. Test Run Instructions
You should perform the Test Run for at least 30 minutes.
1. Connect power to the unit.
2. Press the ON/OFF button on the remote controller to turn
it on.
3. Press the mode button to scroll through the following
functions, one at a time:
•
COOL - Select lowest possible temperature.
•
HEAT - Select highest possible temperature.
4. Let each function run for 5 minutes, and perform the
following checklist:
3.9.2. Before Test Run
Table 1.
Checks
No electrical leakage
Unit is properly grounded
All electrical terminals properly covered
Indoor and outdoor units are solidly
installed
All pipe connection points do not leak
Water drains properly from drain hose
All piping is properly insulated
Unit performs COOL function properly
Unit performs HEAT function properly
Indoor unit louvers rotate properly
Indoor unit responds to remote controller
3.10. Double-Check Pipe Connections
During operation, the pressure of the refrigerant circuit will
increase. This may reveal leaks that were not present during
your initial leak check. Take time during the Test Run to
double-check that all refrigerant pipe connection points do
not have leaks.
•
Using remote control, return unit to the normal
operating temperature.
•
Using insulation tape, wrap the indoor refrigerant
pipe connections that you left uncovered during the
indoor unit installation process.
26
Test Run Checklist
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