EAS Electric ETH-4VB, Installation And Owner'S Manual

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7
Liquid side piping
diameter
Refrigerant to be added
permeter piping
Φ9.5 0.054kg
Indoor Unit
7.4 Connecting method
Outdoor Unit
Outdoor Unit Indoor Unit
4~8kW
10~16kW
1) Size of pipes of Gas side and Liquid side
Φ15.9/Φ9.5 R410A
Refrigerant MODEL Gas side/Liquid side
2) Connection method
Indoor unit
Gas side Liquid side
Flaring Flaring
Flaring Flaring
7.5 Remove Dirt or Water in the Pipes
1) Make sure there is no any dirt or water before connectiong
the piping to the outdoor units.
2) Wash the pipes with high pressure nitrogen, never use refrigerant
of outdoor unit.
7.6 Airtight Test
Charge pressured nitrogen after connecting indoor/outdoor unit
pipes to do airtight test.
CAUTION
● Pressured nitrogen [4.3MPa (44kg/cm
2
) 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.
7.7 Air Purge with Vacuum Pump
1) Using vacuum pump to do the vacuum,never using refrigerant to
expel the air.
2) Vacuuming should be done from both liquid side and gas side
simultaneously.
3) Please select power source for indoor unit and outdoor unit
respectively.
4) The power supply has specified branch circuit with leakage
protector and manual switch.
5) Outdoor unit and indoor unit conncet with required power supply
which is 220-240V~ 50Hz or 380-415V 3N~ 50Hz.
6) Use 3-core screened wire as indoor and outdoor control wire.
7) The installation should comply with relevant national electric
standard.
8) Power wiring should be engaged by specialized electrician.
7.8 Refrigerant Amount to be Added
Calculate the added refrigerant according to the diameter and the
length of the liquid side pipe of the outdoor unit/indoor unit connection.
If the length of the liquid side pipe is less than 10 meters it is no need
to add more refrigerant ,so than calculating the added refrigerant the
length of the liquid side pipe must subtract 10 meters.
4~16kW
Outdoor unit
4~16kW
Fig.7-5
Fig.7-6
Models 4~6kW 8kW 10~16kW
20m 30m 50m
10m 20m 30m
8m 15m 25m
Max. piping length
Max. differance in height
when outdoor unit is upside
Max. differance in height
when outdoor unit is downside
V.2