Test Run - LG MULTI F LMU18CHV Installation Manual

F
MULTI
F
MULTI MAX

Test Run

After checking the system for leaks and performing the evacuation
procedure, perform a test run. Follow the guidelines below for proper
procedure.
Before the Test Run
1. Check that all condensate tubing, refrigerant piping and power
wiring / communications cables are properly connected.
2. Make sure that the gas and liquid service valves are fully open.
Installing the Remote Controller Batteries
As part of the test run, the batteries need to be inserted into the
remote controller, and the remote controller needs to be powered on to
operate the indoor units. To insert the batteries follow the steps below.
For information on using the remote controller, refer to its owner's
manual.
1. The remote controller needs two AAA (1.5V) batteries for operation.
Remove the battery cover from the back of the remote controller by
pushing downward on the tab at the top of the battery cover and
then lift up to remove.
2. Insert the two new batteries. Align batteries by the (+) and (-)
sides (the interior battery compartment of the remote controller will have clear markings for the (+) and (-) placement).
3. Verify that the batteries have "clicked" into the compartment and are firmly engaged with the contacts on either side of them.
4. Reattach the back cover of the remote controller.
5. Proceed with powering on the remote controller and usage as needed.
Test Run Procedure
1. Start up the system and perform a test run. Operate the system in cooling mode for 15 to 20 minutes.
2. Evaluate performance as the system runs, verifying the outdoor unit and all indoor units and BD units (Multi F MAX systems only) are
working properly. Make notes as needed to address any issues that might be found.
• Check the system refrigerant charge:
• Measure the pressure from the gas side service valve.
• Measure the indoor unit inlet and outlet air temperatures. See table below for the optimum condition of the gas side pressure (system
is in cooling mode).
Table 40: Optimum Conditions of the Gas Side Pressure.
Refrigerant Outside Ambient
Type Temperature
R410A
If the pressure is >142psig, the system is most likely overcharged, and refrigerant should be removed. If the pressure is <113 psig, the system is
most likely undercharged and refrigerant should be added.
Figure 84: Inlet and Outlet Temperature Locations on Various Indoor Units.
Gas Side Service
Valve Pressure
Discharge Air
113~142 psig
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. "LG" is a registered trademark of LG Corp.
Figure 82: Piping Connection on the Outdoor Unit (May Differ Depend-
ing on Outdoor Unit Model).
Bolt
Top of Outdoor Unit
(Looking Down)
Bolt
Figure 83: Installing the Remote Controller Batteries.
Inlet Temperature
Discharge Air
Outlet
Temperature
TEST RUN
Refrigerant Pipe
Bolt
Connection Location
Bolt
Inlet Temperature
Inlet Temperature
Discharge Air
Outlet
Temperature
Outlet
Temperature
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