Table of Contents
Advertisement
4.9 Size Of Outdoor Unit Pipes And Piping
Methods
Size of outdoor unit pipes and piping methods
Model
ASDH-96AI (Indoor)
ASDH-96AI (Outdoor)
Allowed length of refrigerant pipe and height difference
Max. actual length of pipe (L)
Height difference
between indoor
unit and outdoor
unit (H)
4.10 Remove Dirt or Water in the Piping
Make sure there is no any dirt or water before connectiong
the piping to the outdoor units.
Wash the piping with high pressure nitrogen, never use
refrigerant of outdoor unit.
Indoor unit
Fig.4-12
Gas side
Liquid side
f
f
25.4mm
9.5mm
f
f
25.4mm
9.5mm
Fig.4-13
Allowed
value
50m
Outdoor
25m
(upper)
Outdoor
30m
(lower)
4.11 Airtight Test
Charge pressured nitrogen after connecting indoor/outdoor unit
piping to do airtight test.
Pressured nitrogen [ 4.3MPa (44kg/cm ) for R410A] should be
used in the airtight test.
Tighten high pressure/low pressure valves before applying
pressured nitrogen.
Apply pressure from air vent mouth on the hight pressure/low
pressure valves.
The high pressure/low pressure valves are closed when
applying pressured nitrogen.
The airtight test should never use any oxygen, flammable
gas or poisonous gas.
4.12 Air Purge with Vacuum Pump
Using vacuum pump to do the vacuum,never using refrigerant to
expel the air.
Vacuuming should be done from both liquid side and gas side
simultaneously.
Open all valves.
4.13 Refrigerant Replenishment Quantity
For one-way pipe whose length is no longer than 5m, please
refer to nameplate for refrigerant filling amount.No extra refriger-
ant is needed.
One-way pipe whose length is longer than 5m, additional
refrigerant quantity should be calculated by pipe diameter and
length of outdoor and indoor unit liquid side pipe.For details,
please refer to table.4-3.
Refrigerant
Diameter of
replenishment quantity
liquid-side pipe
f
0.030(L-5) kg
9.5mm
Please record and keep the refrigerant filling amount for future
use.
NOTE
2
Remarks
L is the length
of One-way pipe
7
Advertisement
Table of Contents
