Cassette Type Room Air conditioner 14th August 2016, Kuantan, Pahang.

Content Indoor & Outdoor unit Part 1 Basic Installation - Duct unit Basic Installation - Cassette unit Part 4 Installation of Outdoor unit Part 5 Copper pipe & Wiring size

Universal Match Part 1 Single Phase Three Phase Same ODU Match Different Types Of IDU Same IDU Match ODU With Different Power Supply 1, Same ODU match different types of IDU, one condition, same capacity. 2, Same IDU match both R22 and R410a ODU. 3, Same IDU match ODU with singe phase and three phases power supply. 4, Same IDU match cooling only and heatpump ODU. Single Phase Three Phase

Outdoor Unit 18K 24/30K 36K 42/48K

Indoor Unit Duct Type Cassette Type 36K 18K 24K 18K 24/30/36/42K 48K 4 cases to duct type IDU. 4 cases to cassette type IDU. 3 cases to floor ceiling type IDU. 18K 24/30/36/42K 48K

Part 2 Installation of Duct Unit

The requirements is A=B≥P/10+20(mm) Condensate drainpipe : set up a backwater elbow to avoid water back for the negative pressure of inside unit. The requirements is A=B≥P/10+20(mm)

Supply air duct, return air duct and the fresh air duct must be covered with a layer of thermal insulation to avoid thermal leakage and condensation. The supply air duct and the return air duct shall be fixed to the prefabricated boards of the ceiling by using iron support.

DUCT 距离地面的高度一般大于2.5m，24K以上。 the lifting screw The hook The nut The screw The air outlet the unit 距离地面的高度一般大于2.5m，24K以上。 Install the duct type. This the installation sketch for your reference.

The edge of the return air duct must be at least 150mm away from the wall.

Installation of rectangular air duct: Hanger rod Return air duct Canvas air duct Return air inlet Supply air outlet Main supply air duct Return air Filter

Installation of round air duct: Hanger rod Return air duct Canvas air duct Return air inlet Supply air outlet Main supply air duct Filter

DUCT √ Protection is needed After finishing the installation, covered with the plastic package to prevent air dust from getting into the unit. Use the ruler to make sure the unit was installed levelly. It is very important for drain.

DUCT The air outlet is too close to air inlet, it formed air return short circuit. The cooling efficiency is very poor. For this picture, the air outlet was blocked by the decoration wall. The cooling air can't reach the floor. √

Installation of Cassatte Unit Part 3

To prevent bent of the drain hose, the distance between hoisting stand should be 1 to 1.5m!

The install height of the drain raising pipe should less than 280mm. The drain raising pipe should form a right angle with the unit, and distance to unit should not beyond 300mm.

CASSETTE >160mm >20mm H=260mm Here is installation sketch of cassette unit for your reference. Install the unit in the proper height and keep enough space around the air outlet. Make sure the air flow circuit is smooth. >20mm >160mm

The slant gradient of the attached drain hose should be within 75mm so that the drain hole doesn’t has to ensure the unnecessary outside force. 1、Check if the water correctly flow through the pipelines; 2、The joint of the drainage pipe must not have leakage; 3、The drainage pipe shall be installed with inclining angle of 5~10°

discharge pump integrated Drain pipe Guide louver discharge pump integrated Supports for IDU  Here is the picture after the whole installation. For the connection pipe and drain pipe, it is necessary to do insulation and tie up the connector to avoid condensate water. Also in order to prevent the air dust from getting into the unit, please cover the unit with plastic package. Connection pipe

Installation of Outdoor Unit Part 4 Installation Clearance Data

Selection of Installation Site Problem?

If the height difference between indoor and outdoor units is over 10m, it is required to install an oil trap every 6 meters.

Minimize the number of elbows on connection pipe. Shorten the connection pipe to minimum, preferably within 5m. ≤5m If the connection pipe is extended longer, it is needed to check if the lubricating oil in the system is enough. Add if needed. Reduce the height difference between indoor and outdoor units as it might be. Minimize the number of elbows on connection pipe.

The principles of refrigerant piping:

Tighten the flared nuts with torque wrench, until you hear a ‘KATA” sound from the torque wrench.

Correct Wrong Wrong Wrong pipe cutting and flaring Piping/ Pressure/ Vacuum pipe cutting and flaring Caution 1: the pipe cutter should be vertical to the pipe axis . Not vertical vertical Correct Wrong Caution 2: Pay attention to the cutting speed and force to avoid deforming the pipe. copper pipe is deformed Too much force Wrong Wrong

 Wrong Correct Piping/ Pressure/ Vacuum Caution 3: When removing the burr, the pipe orifice should be downward to prevent the scrap from getting into the pipe. Wrong Correct Burr Pipe orifice downward  Double surface Crack

Flaring Make sure the pipe port no crack, no double edges. Once slant, double edges, or crack happens, the pipe should be cut and reprocessed. Once slant, double edges, or crack happens, the pipe should be cut and reprocessed.

Nitrogen charge before welding Nitrogen protection Piping/ Pressure/ Vacuum Welding Welding Process Nitrogen charge before welding Nitrogen charge pipe Copper pipe Places requiring protection during welding Vent port Nitrogen(N 2) Here is the welding process for your reference. Keep there is slight nitrogen in the pipe during welding.

Without nitrogen With nitrogen Welding Piping/ Pressure/ Vacuum Here we can see, without nitrogen, there is oxide on the surface. When welding with nitrogen, it is very clean on the surface.

1、R22压缩机用的是什么型号的润滑油？----------- ATMOS NM56EP 2、R410A压缩机用的是什么型号的润滑油？----------- Ze-GLES RB68EP 3、行业内的润滑油是不是有统一标准？不同供应商的润滑油是否有差异？能否混用？-------有行业标准，不同压缩机厂家不同供应商，相同冷媒用的冷冻油牌号一般不同（比如日立跟凌达的R22冷媒用的冷冻油牌号就不同），但冷冻油主材相同，只是辅料不同（辅料不同主要会影响耐磨性），如果混用，短期内都不会有影响，可能较长时间会影响到可靠性。

Indoor unit water leaking due to poor insulation All the connector should be covered with insulation sponge. And use the flexible drainage tube and tighten it with thread loop. Or it may cause the water leakage.  Indoor unit water leaking due to poor insulation

Discharge the air out of the machine by vacuum pump: Connect the tubes of the vacuum watch as follow photo; Close the low pressure handle and stop vacuumize when the indicator turns to -1 bar, wait for 15minutes to keep a stable value of the vacuum watch; Take out the valve cover of the gas valve together with the liquid valve. Loose the cord of liquid valve until pressure rise to 0bar. Dismantle the tube from the cover of the inlet for refrigerant then tighten the cover . Loose the valve cord of the gas valeve as well as the liquid valve entirly. Tighten the valve cover of the gas valve and liquid valve so as to chek whether leakage occurred.

R410A Part 5 Specification of Connection Pipe – CASSETTE NON-INVERTER Model Liquid (Hi Side) Gas (Lo Side) Max. pipe length (M) Max. pipe elevation between in/outdoor unit (M) Additional refrigerant for extra pipe。 R410A GX-A18TCV / GU-A18TCV 1/4 1/2 15 22g/m GX-A24TCV / GU-A24TCV 3/8 5/8 54g/m GX-A30TCV / GU-A30TCV 30 GX-A36TCV / GU-A36TCV 3/4 GX-A42TCV / GU-A42TCV 110g/m

R410A Specification of Connection Pipe – CASSETTE INVERTERS Model Liquid (Hi Side) Gas (Lo Side) Max. pipe length (M) Max. pipe elevation between in/outdoor unit (M) Additional refrigerant for extra pipe。 R410A GX-X18SCR / GU-X18SCR 1/4 1/2 20 15 60g/m GX-X24SCR / GU-X24SCR 3/8 5/8 30 GX-X30SCR / GU-X30SCR GX-X42SCR / GU-X42SCR

R410A Specification of Connection Pipe – DUCT INVERTERS Model Liquid (Hi Side) Gas (Lo Side) Max. pipe length (M) Max. pipe elevation between in/outdoor unit (M) Additional refrigerant for extra pipe。 R410A GB-X18SCR / GU-X18SCR 1/4 1/2 20 15 60g/m GB-X24SCR / GU-X24SCR 3/8 5/8 30 GB-X36SCR / GU-X36SCR

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