Loading ...
Loading ...
Loading ...
25
General Installation Guidelines
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.
MULTI
F
MAX
MULTI
F
Pipe size (Inches O.D.) Tightening torque (ft-lbs)
1/4Ø 13 ~ 18
3/8Ø 24.6 ~ 30.4
1/2Ø 39.8 ~ 47.7
5/8Ø 45.6 ~ 59.3
3/4Ø 71.6 ~ 87.5
Table 10: Tightening Torque for Flare Nuts.
Do not use polyolyester (POE) or any other type of mineral oil
as a thread lubricant. These lubricants are not compatible with PVE
oil used in this system and create oil sludge leading to equipment
damage and system malfunction.
Tightening the Flare Connections
When connecting the flare nuts, coat the flare (outside only) with
polyvinyl ether (PVE) refrigeration oil only.
Ø1/2 Inch Connector
Liquid Piping
Main Liquid
Piping Valve
Main Gas
Piping Valve
ROOM A
ROOM B
ROOM C
Gas side
piping
For Multi F MAX outdoor units, piping can be installed in one of four directions: front, side, back, and down (A). If the downward installation is
chosen, the knockout hole in the base pan must be accessed (B).
Whatever direction is chosen, plug the access holes with field-provided putty or insulation to fill all gaps (C).
Continuous
Torque
Wrench
When tightening the
piping connection,
firmly hold the flare nut.
Front
Side
Back
Knockout Hole Base Pan
Down
Gas Piping
(Bigger Diameter)
Liquid Piping
(Smaller Diameter)
Putty or Insulation (field-supplied)
Drain Hose
Wire
Connection Pipe
A
B
C
Figure 15: Flare Connection. Figure 16: Example of Multi F Piping Connections. Figure 17: Multi F MAX Piping Connection.
Insects or small animals entering the outdoor unit may cause a short
FLUFXLWLQWKHHOHFWULFDOER[ZKLFKPD\OHDGWR¿UHHOHFWULFVKRFN
physical injury, or death.
Insects or small animals entering the outdoor unit may cause a short
FLUFXLWLQWKHHOHFWULFDOER[ZKLFKPD\OHDGWRXQLWIDLOXUH
Figure 18: Multi F MAX Piping Installation.
Align the center of the piping, and initially hand tighten the flare nuts using three (3) or four (4) turns. For Multi F Outdoor Units, install the
flare nuts by:
Then, to finish tighten the flare nut using the torque wrench and a backup wrench, following the direction arrows on the wrench and using the
appropriate tightening torque, until the wrench clicks. After all the piping has been connected, check for refrigerant gas leaks.
1. Connecting the Gas Piping for Connections A through D first. 2. Connecting the Liquid Piping for Connections A through D last.
GENERAL INSTALLATION GUIDELINES
Piping Preparation
Loading ...
Loading ...
Loading ...