Install Instructions
Table Of Contents
38
Single Zone High Efciency, Standard, Extended Pipe and Mega Wall Mount Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
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REFRIGERANT PIPING CONNECTIONS
Pump Down, Cooling Only Mode
Useavacuumpumpthatcanevacuatedownto500microns.
1. If moisture remains in the piping after the system is evacuated for two (2) hours, break the vacuum (down to 7.5 psi with nitrogen gas).
2. Evacuate the system again with the vacuum pump for at least one (1) hour to 500 microns
3. If the system does not reach 500 microns within two (2) hours, repeat the vacuum break and evacuation procedure until the gauge does
not rise.
Pump Down Procedure
This procedure is performed when a unit has to be relocated or the refrigerant circuit is serviced. “Pumping down” is a term used to mean
collecting all refrigerant into the outdoor unit without the loss of any refrigerant. Follow the procedure and guidelines below to safely collect
refrigerant back into the outdoor unit. Always adhere to and be familiar with local codes regarding the handling of refrigerant.
The system must be placed in Cooling mode in order to proceed with the pump down procedure. If needed, refer to the sections below for
proper steps to place the unit into Cooling Mode.
1. Connect a low-pressure gauge with manifold hose to the charge port on the gas line service valve.
2. Open the gas line service valve halfway.
3. Purge the air in the manifold hose using the refrigerant.
4. Close the liquid line service valve all the way.
5. Turn on the units power switch and start the cooling mode operation.
6. Observe the pressure gauge reading. When it gets to 1 to 0.5 kg/cm
2
(14.2 to 7.1 P.S.I.G), fully close the gas line valve and then immedi-
ately turn the unit off.
• Pump down procedure is complete at this time and all refrigerant should be collected into the outdoor unit.
PerformPumpDownprocedureonlyinthecoolingmode.
Enabling Cooling Only Mode
Before running the Pump Down procedure, you must place the unit
into Cooling Only Mode. In order to be able to run Cooling Only
Mode, you must enter the unit into the Installer Mode by pressing the
Reset button and the JET MODE button simultaneously.
1. Shut down power to system completely.
2. Enter the Installer Mode as stated in the paragraph above.
3. Set code to 45.
4. Press Power-ON button and select the code number 45.
• Unit should beep to acknowledge that code has been received.
5. Turn off power.
• Let unit cycle off for a minimum of 30 seconds.
6. Turn power back on to system.
Disabling Cooling Only Mode
After Pump Down procedure has been performed, you will need
to disable Cooling Only Mode, and place the unit back into normal
operating mode. Follow the procedure below.
1. Shut down power to system completely.
2. Enter the Installer Mode.
3. Set code to 46.
4. Press Power-ON button and select the code number 46.
• Unit should beep to acknowledge that code has been received.
5. Turn off power.
• Let unit cycle off for a minimum of 30 seconds.
6. Turn power back on to system.
•OncethesystemisinInstallerMode(withCoolingOnlyModeinitiated),automaticoperationissuspended.
•OnceCoolingOnlyModeisdisabled,theunitwillreturntonormaloperation.
•InstallerCodecannotbeenterediftheunitisrunning.Thesystemmustbecompletelypoweredoff.
•AllInstallerCodenumbersmustbeenteredintothesystemduringPowerOffstate.(Competeshutdownofthesystem.)
•WLANModule’scommunicationtimewilllagbyabout1minuteafterunitisturnedbackon,andinnormaloperatingmode.
•EntirelockorModelockcannotbesetifyousetheatingorautomaticoperationthroughthecentralcontroller.
Neverairpurgewithrefrigerantasitcanleadtorefrigerantleakagewhichcancausebodilyharmandinjury,especiallyifinhaled.
Neverinhaleorhandlerefrigerantdirectly.Doingsomaycausebodily
harmandinjury.