Installation Instructions

11
Triple Evacuation Method
The triple evacuation method should only be used when the
vacuum pump is only capable of pumping down to 28 in. of
mercury vacuum and the system does not contain any liquid water.
Refer to Fig. 22 and proceed as follows:
1. Pump the system down to 28 in. of mercury and allow the
pump to continue operating for an additional 15 minutes.
2. Close the service valves and shut off the vacuum pump.
3. Connect a nitrogen cylinder and regulator to the system and
open until the system pressure is 2 psig.
4. Close the service valve and allow the system to stand for 1
hr. During this time, dry nitrogen will be able to diffuse
throughout the system absorbing moisture.
5. Repeat this procedure as indicated in Fig. 22. The system
will then be free of any contaminants and water vapor.
CHECK FOR TIGHT, DRY SYSTEM
(IF IT HOLDS DEEP VACUUM)
EVACUATE
BREAK VACUUM WITH DRY NITROGEN
WAIT
EVACUATE
RELEASE CHARGE INTO SYSTEM
BREAK VACUUM WITH DRY NITROGEN
EVACUATE
WAIT
A95425
Fig. 22 - Triple Evacuation Method
Final Tubing Check
IMPORTANT: Check to be certain factory tubing on both indoor
and outdoor unit has not shifted during shipment. Ensure tubes are
not rubbing against each other or any sheet metal. Pay close
attention to feeder tubes, making sure wire ties on feeder tubes are
secure and tight.
START−UP
Test Operation
Perform a test operation after completing gas leak and electrical
safety check (see Fig. 23).
Manual control
button
AUTO/COOL
A14353
Fig. 23 - Test Operation
1. Push the “ON/OFF” button on the remote control to begin
testing.
NOTE: A protection feature prevents the air conditioner from
being activated for approximately 3 to 4 minutes.
2. Push the MODE button, select COOLING, HEATING,
FAN mode to check if all the functions work correctly.
3. To run the test using the manual button in the indoor unit:
(1.) Open the front panel of the indoor unit;
(2.) Push the manual switch once to energize the unit.
The set conditions of the manual operation are as
follows:
· Preset set point: 76_F (24_C)
· Fan speed: AUTO
· Discharge air direction: Pre−set position based on
operation in “COOL” or “HEAT” mode.
4. Be sure to set the manual switch to “OFF” (by pushing it
twice again) after finishing the test operation.
NOTE: For Heat Pumps, follow the same procedure.
SYSTEM CHECKS
1. Conceal the tubing where possible.
2. Make sure the drain tube slopes downward along its entire
length.
3. Ensure all tubing and connections are properly insulated.
4. Fasten the tubes to the outside wall, when possible.
5. Seal the hole through which the cables and tubing pass.
INDOOR UNIT
1. Do all the remote control buttons function properly?
2. Do the display panel lights work properly?
3. Does the air deflection louver function properly?
4. Does the drain work?
OUTDOOR UNIT
1. Are there unusual noises or vibrations during operation?
Explain the Following Items to the Customer (with the aid of
the Owner’s Manual):
1. How to turn air conditioner on and off; selecting
COOLING, HEATING and other operating modes; setting
a desired temperature; setting the timer to automatically start
and stop the air conditioner operation; and all other features
of the remote control and display panel.
2. How to remove and clean the air filter.
3. How to set air deflection louver.
4. Explain care and maintenance.
5. Present the owner’s manual and installation instructions to
customer.