Heat Recovery Unit Refrigerant Piping Connections - LG MULTI V ARNH423K3A4 Installation Manual

INSTALLING THE REFRIGERANT PIPING

Heat Recovery Unit Refrigerant Piping Connections

Heat Recovery Unit Refrigerant
Piping Connections
• The 96k Hydro Kit requires the use of two ports twinned together
ARBLN03321 for this application.
• If the capacity of the Hydro Kit and other indoor units connected to
the Heat Recovery Unit are similar, install the Hydro Kit on Ports 1
and 2.
• Ports are numbered right-to-left on the new PRHR*3A heat recov-
ery units.
• Refer to the specific Air-Source / Water-Source Installation Manual
for detailed information about Heat Recovery Unit installation.
Figure 10:
Kit Model
Vapor Pipe Dimensions
No.
I.D. 7/8 (22.2)
I.D. 1 (25.4)
I.D. 3/4 (19.05)
1
ARBLN03321
I.D. 7/8 (22.2)
O.D. 3/4 (19.05)
3
2-3/4 (70)
When Pre-Commissioning / Addressing Systems with Hydro Kits
• The pipe numbers of the connected vapor and liquid pipes must be the same.
• Ensure that there is flow of water during the auto addressing / valve port detection procedure.
• Each indoor unit (including Hydro Kits) is assigned a unique address and is detected by the outdoor unit while performing the auto address-
ing / valve port detection process.
Auto Addressing / Valve Port Detection with Hydro Kits
1. Choose the "Mode" according to the water temperature.
• Use "Mode 1" if the water temperature is higher than 86°F (30°C).
• Use "Mode 2" if the water temperature is lower than 86°F (30°C).
2. Ensure that there is flow of water (the water pump is operating) during the auto addressing / valve port detection process.
• If water circulation is not detected by water flow switch, a "CH14" error will occur.
• An auto addressing / valve port detection process error will occur if the Hydro Kit piping temperature does not increase.
• For detailed information on Pre-Commissioning, Addressing, Valve Port Detection procedures, review the installation manual for the specific
outdoor unit / water-source unit.
30
I.D. 3/4 (19.05)
I.D. 5/8 (15.88)
I.D. 1/2 (12.7)
2
I.D. 1/2
I.D. 3/4 (19.05)
3-1/4
I.D. 5/8 (15.88) (12.7)
(83)
15-3/8 (390)
3
16-1/4 (413)
I.D. 7/8 (22.2)
I.D. 28.58 (1-1/8)
O.D. 3/4 (19.05)
O.D. 1 (25.4)
I.D. 1 (25.4)
1 2
4-5/16 (110)
3-1/8 (80)
AJR54072930
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 Life's Good" is a registered trademark of LG Corp.
Figure 9: Hydro Kit Refrigerant Pipe Connections on a Heat Recovery
Unit.
Liquid Pipe Dimensions
I.D. 1/2 (12.7)
I.D. 3/8 (9.52)
I.D. 3/8 (9.52)
I.D. 1/2 (12.7)
I.D. 1/2 (12.7)
I.D. 3/8 (9.52)
I.D. 1/4 (6.35)
12-5/8 (321)
13-1/16 (332)
AJR54072928
Vapor Pipe
Liquid Pipe
Hydro Kit
Vapor Pipe
Liquid Pipe
Unit: Inch
I.D. 1/4 (6.35)
2-15/16
(74)