Lennox MWHA009S4, Руководство по обслуживанию

Страница: 13 / 52

13
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, this well over shoot the temperature by 6-8
degrees below what was set for dry mode.
NOTE: Using this mode will over shoot the temp by 6-8
degrees below what was set for dry mode.
6.3.2. 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.
6.4. Test Run - Indoor Units
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.
6.4.1. 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 functions,
one at a time:
4. Let each function run for five minutes, and perform the
following checks:
6.4.2. Before Test Run
Table 3. Test Run Checklist
Checks Pass Fail
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
Indoor unit louvers rotate
properly
Indoor unit responds to
remote controller
6.5. 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.
6.6. Ambient Temperature is Below 63°F
(17°C)
You can’t use the remote controller to turn on the COOL
function when the ambient temperature is below 17°C. In
this instance, you can use the MANUAL CONTROL button
to test the COOL function.
• Lift the front panel of the indoor unit, and raise it until it
clicks in place.
• The MANUAL CONTROL button is located on the right-
hand side of the unit. Press it one time to select the
COOL function. First push is FC force cooling, which
will display on the wall unit as FC which is used for high
speed charging 30 minute time.
• Perform Test Run as normal.
• Push the button one time is for FC force cooling, which
will displayed on wall unit as FC. This is used for high
speed charging 30 minute time.
• Push the button two times for cooling set 75ºF and unit
is in auto mode. Temperature is set at 75°F with no
changing of set temperature..