Double-Check Pipe Connections; If Ambient Temperature Is Below 63°F (17°C); Dry Mode Operation (Dehumidification); Procedure - Lennox MPA009S4S-*L Installation Instructions Manual

Table 8. Test Run Checklist
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

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.
1. Using remote control, return unit to the normal
operating temperature
2. Using insulation tape, wrap the indoor refrigerant pipe
connections that you left uncovered during the indoor
unit installation process
If Ambient Temperature is below 63°F (17°C)
You cannot use the remote controller to turn on the
COOL function when the ambient temperature is below
63°F (17°C). In this instance, you can use the MANUAL
CONTROL button to test the COOL function.
1. Lift the front panel of the indoor unit, and raise it until
it clicks in place
2. The MANUAL CONTROL button is located on the
right-hand side of the unit. Press it 2 times to select
the COOL function
3. Perform Test Run as normal
Pass Fail
Figure 37. Manual Control Button

Dry Mode Operation (Dehumidification)

Procedure

1. Using the provided wireless remote control, press the
MODE button and select DRY mode.
2. Press the UP/ DOWN button to select the desired
temperature. The temperature setting range is from
62°F (17°C) to 86°F (30°C) 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°F
(3-5°C) depending on the room size or other
various factors. Also the Follow Me mode does
not operate in this mode.
NOTE: In addition, the indoor 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.

Sequence of Operation

When in dry mode operation the unit is actually in cooling
mode with a low speed blower operation. Set remote temp
to a lower room temp to begin the dry mode operation.
The compressor will stop when the room temperature is
4°F (2°C) 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 8°F (4°C) lower than the room
temperature settings.
27
Manual control
button