Piping And Wiring For Outdoor Unit; Refrigerant Piping; Constraints In Pipe Length And Elevation - LG THERMA V Air-to-Water Heat Pump Installation Manual

5. Piping and Wiring for Outdoor Unit

Procedures about refrigerant piping and electric wiring at the outdoor are described in this chapter. Most of
procedures are similar to those of LG Air Conditioner.

Refrigerant Piping

Before starting refrigerant piping, constraints in pipe length and elevation should be examined. After
resolving all constraints, some preparations are required to proceed. Then connecting pipe to the outdoor
and the indoor unit is beginning.

Constraints in Pipe Length and Elevation

Type Capacity
9kW
Non-Vapor
12kW
Injection 14kW
16kW
9kW
Vapor
12kW
Injection
14kW
1. Standard pipe length is 7.5m and no additional charge of the refrigerant is needed to maximum
15m. If the pipe length is longer than 15m, additional charge of the refrigerant is required
according to the table.
• Example : If 16kW model is installed at a distance of 50m, 2,100g of refrigerant should be
added according to following formula : (50-15) x 60g = 2,100g
2. Rated capacity of the product is based on standard length and maximum allowable length is
based on the product reliability in the operation.
3. Improper refrigerant charge may result in abnormal operation.
Note:
Fill in the f-gas Label attached on outdoor about the quantity of the fluorinated greenhouse gases (This note about
f-gas label may not apply depending on your product type or market.)
① Manufacturing site (See Model Name label)
② Installation site (If possible being placed adjacent to the service points for the addition or removal of refrigerant)
③ The total Charge (① + ②)
Pipe Size (mm : inch)
(Diameter : Ø)
Gas Liquid
15.88(5/8") 9.52(3/8")
15.88(5/8") 9.52(3/8")
15.88(5/8") 9.52(3/8")
15.88(5/8") 9.52(3/8")
Indoor unit
A
B
Outdoor unit
Piping and Wiring for Outdoor Unit
Length A (m)
Standard Max.
7.5 50
7.5 50
7.5 50
7.5 50
A trap is not necessary
when the outdoor unit is
installed in a higher
position than the indoor
unit.
A
Indoor unit
*Additional
Elevation B (m)
Refrigerant
Standard Max.
0 30
0 30
0 30
0 30
Outdoor unit
B
Installation Manual 41
(g/m)
30
60
30
50