HSU-18HEK03-R2 - Air-conditioner HAIER - Free user manual and instructions

Product type	Wall-mounted split air conditioner
Brand	HAIER
Model	HSU-18HEK03-R2
Refrigerant	R410A (GWP 1975)
Cooling capacity	18,000 BTU/h (estimated)
Heating capacity	Heat pump
Power supply	220-230 V / 50 Hz
PCB fuse	T 3.15A / 250V
Power cable type	H05RN-F or H07RN-F
Liquid pipe diameter	6.35 mm (1/4")
Gas pipe diameter	12.7 mm (1/2")
Max pipe length	15 m
Max height difference	10 m
Filters	Removable air filters
Remote control	Yes (with R-03 batteries)
Ionizer	Optional
Drainage	Drain hose included
Connection cable cross-section	≥ 3G1.5 mm² + 2x0.75 mm²
Service pressure	-0.1 MPa (vacuum)

Frequently Asked Questions - HSU-18HEK03-R2 HAIER

What type of refrigerant is used and its environmental impact?

The refrigerant used is R410A with a global warming potential (GWP) of 1975. It is covered by the Kyoto Protocol and must not be released into the atmosphere. The refrigerant charge label must be completed and affixed near the charge port.

How to properly install the indoor unit?

First, level the mounting plate using a plumb line. Drill a 60 mm diameter hole slightly sloping downward toward the outside. Install the hole cover and sleeve. Hook the unit onto the upper notches of the plate, then lower it perpendicularly. Ensure it is securely fastened.

What precautions should be taken for electrical connection?

Use a power cable of type H05RN-F or H07RN-F with a minimum cross-section of 3G1.5 mm². Connect the terminals respecting the numbers (1, 2, 3, 4). Tighten the screws firmly and secure the cable with the cable clamp. A bipolar circuit breaker with a contact gap of at least 3 mm must be installed on the fixed circuit.

How to purge the air from the refrigerant circuit?

Use a vacuum pump: connect the manifold to the service port of the 3-way valve, open the low-pressure valve, vacuum for at least 15 minutes until -0.1 MPa (76 cm Hg). Close the valve, check for leaks for 1-2 minutes. Open the 2-way valve 90° for 6 seconds, then close. Check for leaks. If no leaks, fully open the valves.

How to clean the air filters?

Open the front panel, lift the filter by the tab and pull it downward. Wash it with warm water (max 40°C) and mild detergent, rinse and dry in the shade. Reinstall it by sliding the hooks into the slots. Clean the filters approximately every 2 weeks.

What to do if the PCB fuse blows?

Replace it only with a fuse of type T 3.15A / 250V. If the problem persists, contact a qualified technician. Never use a fuse of a different rating.

What is the maximum allowed pipe length?

The maximum length is 15 meters. If it exceeds 7 meters, additional refrigerant charge is required (20 g per meter beyond 7 m). The maximum height difference between units is 10 meters. Beyond 5 meters, install an oil trap every 5-7 meters.

How to remove the front panel for maintenance?

Open the panel horizontally, then release the pivots on both sides to remove it. To reassemble, align the right and left shafts in the grooves and push all the way. Be careful not to pinch the air direction louver.

Can the air conditioner operate in heating mode?

Yes, the model HSU-18HEK03-R2 is a heat pump and can therefore provide heating. The reverse cycle allows heating in winter. Check the remote control to select the desired mode.

What to do in case of refrigerant gas leak?

If a leak is detected, repair the leak point, then recover all the refrigerant. Perform vacuum drying and recharge with the recommended amount (see nameplate). Do not allow air or other gases to enter the circuit, as this would cause abnormal pressure and could damage the unit.

USER MANUAL HSU-18HEK03-R2 HAIER

Necessary Tools for Installation

• Driver
  Nipper
  Hacksaw
• Hole core drill
• Spanner(17,19 and 26mm)
  Gas leakage detector or

soap-and-water solution

• Torque wrench
  (17mm,22mm,26mm)
• Pipe cutter
  Flaring tool
  Knife
• Measuring tape
  Reamer

Power Source

• Before inserting power plug into receptacle, check the voltage without fail. The power source is the same as the corresponding name plate.
  Install an exclusive branch circuit of the power.
• A receptacle shall be set up in a distance where the power cable can be reached. Do not extend the cable by cutting it.

Selection of Installation Place

Indoor Unit

• Place, robust not causing vibration, where the body can be supported sufficiently.
• Place, not affected by heat or steam generated in the vicinity, where inlet and outlet of the unit are not disturbed.
• Place, possible to drain easily, where piping can be connected with the outdoor unit.
• Place, where cold air can be spread in a room entirely.
  Place, nearby a power receptacle, with enough space around. (Refer to drawings).
• Place where the distance of more than 1m from televisions, radios, wireless apparatuses and fluorescent lamps can be left.
• In the case of fixing the remote controller on a wall, place where the indoor unit can receive signals when the fluorescent lamps in the room are lightened.

Outdoor Unit

• Place, which is less affected by rain or direct sunlight and is sufficiently ventilated.
• Place, possible to bear the unit, where vibration and noise are not increased.
• Place, where discharged wind and noise do not cause a nuisance to the neighbors.
• Place, where a distance marked is available as illustrated in the above figure.

Drawing for the installation of indoor and outdoor units

The models adopt HFC free refrigerant R410A

Please be subject to the actual product purchased , the above picture is just for your reference.

Read this manual before installation

Explain sufficiently the operating means to the user according to this manual

Optional parts for piping

A Non-adhesive tape
Adhesive tape
C Saddle (L.S) with screws
Connecting electric cable for indoor and outdoor
E Drain hose
Heating insulating material
G)Piping hole cover

Floor fixing dimensions of the outdoor unit (Unit:mm)

Fixing of outdoor unit

Fix the unit to concrete or block with bolts (10mm) and nuts firmly and horizontally.
- When fitting the unit to wall surface, roof or rooftop, fix a supporter surely with nails or wires in consideration of earthquake and strong wind.
If vibration may affect the house, fix the unit by attaching a vibration-proof mat.

Accessory parts

Remote controller (1)	Drain hose (1)
R-03 dry battery (2)	Cushion (4)
Mounting plate (1)	Drain-elbow (1)
Plastic cap (4) Ø4X25 Screw (4)	Pipe supporting plate (1)

Selection of pipe

Liquid pipe (Ø)	6.35mm(1/4")
Gas pipe (Ø)	12.7mm(1/2")

NOTE: The thickness of the pipe must be 0.8mm at least.

Indoor unit

Fitting of the Mounting Plate and Positioning of the wall Hole

When the mounting plate is first fixed

1. Carry out, based on the neighboring pillars or lintels, a proper leveling for the plate to be fixed against the wall, then temporarily fasten the plate with one steel nail.
2. Make sure once more the proper level of the plate, by hanging a thread with a weight from the central top of the plate, then fasten securely the plate with the attachment steel nail.
3. Find the wall hole location A using a measuring tape

When the mounting plate is fixed side bar and lintel

Fix to side bar and lintel a mounting bar, Which is separately sold, and then fasten the plate to the fixed mounting bar.
Refer to the previous article, "When the mounting plate is first fixed", for the position of wall hole.

2 Making a Hole on the Wall and Fitting the Piping Hole Cover

• Make a hole of 60~mm in diameter, slightly descending to outside the wall.
  Install piping hole cover and seal it off with putty after installation

(Section of wall hole) (G)Piping hole pipe

3 Installation of the Indoor Unit

Drawing of pipe

[ Rear piping ]

• Draw pipes and the drain hose, then fasten them with the adhesive tape

[Left-Left-rear piping]

• In case of left side piping, cut away, with a nipper, the lid for left piping.

• In case of left-rear piping, bend the pipes according to the piping direction to
  the mark of hole for left-rear piping which is marked on heat insulation materials.

• Insert the drain hose into the dent of heat insulation materials of indoor unit.

• Insert the indoor/outdoor electric cable from backside of indoor unit, and pull it out on the front side, then connect them.
• Coat the flaring seal face with refrigerant oil and connect pipes. Cover the connection part with heat insulation materials closely, and make sure fixing with adhesive tape

• Indoor/outdoor electric cable and drain hose must be bound with refrigerant piping by protecting tape.

[Other direction piping]

• Cut away, with a nipper, the lid for piping according to the piping direction and then bend the pipe according to the deposition of wall hole. When bending, be careful not to crash pipes.
• Connect beforehand the indoor/outdoor electric cable, and then pull out the connected to the heat insulation of connecting part specially.

Fixing the indoor unit body

• Hang surely the unit body onto the upper notches of the mounting plate. Move the body from side to side to verify its secure fixing.
  In order to fix the body onto the mounting plate, hold up the body aslant from the underside and then put it down perpendicularly.

Unloading of indoor unit body

When you unload the indoor unit, please use your hand to arise the body to leave agraffe, then lift the bottom of the body outward slightly and lift the unit aslant until it leaves the mounting plate.

4 Connecting the indoor/outdoor Electric Cable

Removing the wiring cover

• Remove terminal cover at right bottom corner of indoor unit, then take off wiring cover by removing its screws.

When connecting the cable after installing the indoor unit

1. Insert from outside the room cable into left side of the wall hole, in which the pipe has already existed.
2. Pull out the cable on the front side, and connect the cable making a loop.

When connecting the cable before installing the indoor unit

• Insert the cable from the back side of the unit, then pull it out on the front side.
• Loosen the screws and insert the cable ends fully into terminal block, then tighten the screws.
• Pull the cable slightly to make sure the cables have been properly inserted and tightened.
• After the cable connection, never fail to fasten the connected cable with the wiring cover.

Note

When connecting the cable, confirm the terminal number of indoor and outdoor units carefully. If wiring is not correct, proper operation can not be carried out and will cause defect.

Power cable: ≥3G1.5mm²

Connecting wiring: 1(L)、2(N)、 ≥slant 3G1.5mm^2

3、 4≥slant 2G0.75mm^2

HSU-18RE03/R2

HSU-14HR03/R2

HSU-22RE03/R2

HSU-18HR03/R2

Power cable: ≥3G1.5mm²

Connecting wiring: ≥ 3G1.5mm^2 (For: L N ⑤ )+2x0.75mm²

HSU-18HEK03/R2

HSU-18HRA03/R2

HSU-18HEA03/R2

HSU-18HV03/R2

HSU-18RH03/R2

1. If the supply cord is damaged, it must be replaced by the manufacturer or its service agent or a similar qualified person. The type of connecting wire is H05RN-F or H07RN-F.
2. If the fuse on PC board is broken please change it with the type of T. 3.15A/250V.
3. The wiring method should be in line with the local wiring standard.
4. After installation, the power plug should be easily reached.
5. A breaker should be incorporated into fixed wiring. The breaker should be all-pole switch and the distance between its two contacts should be not less than 3mm.

Outdoor unit

Installation of Outdoor Unit

Install according to Drawing for the installation of indoor and outdoor units

2 Connection of pipes

• To bend a pipe, give the roundness as large as possible not to crush the pipe, and the bending radius should be 30 to 40mm or longer.
• Connecting the pipe of gas side first makes working easier.
  The connection pipe is specialized for R410A.

Half union

Flare nut

Forced fastening without careful centering may damage the threads and cause a leakage of gas.

Spanner

Torque wrench

Pipe Diameter(ø)	Fastening torque
Liquid side6.35mm(1/4")	18N.m
Liquid/Gas side9.52mm(3/8")	42 N.m
Gas side 12.7mm(1/2")	55N.m
Gas side 15.88mm(5/8")	60 N.m

Be careful that matters, such as wastes of sands, etc. shall not enter the pipe. The standard pipe length is 5m . If it is over 7m , the function of the unit will be affected. If the pipe has to be lengthened, the refrigerant should be charged, according to 20g / m . But the charge of refrigerant must be conducted by professional air conditioner engineer. Before adding additional refrigerant, perform air purging from the refrigerant pipes and indoor unit using a vacuum pump, then charge additional refrigerant.

CAUTION

Max.Elevation: Amax=10m
- In case the elevation A is more than 5m, oil trap should be installed every 5-7m
- Max. Length: Bmax=15m - In case the pipe length B is more than 7m, the refrigerant should be charged, according to 20 g/m.

3 Connection

• Use the same method on indoor unit. Loosen the screws on terminal block and insert the plugs fully into terminal block, then tighten the screws.
• Insert the cable according to terminal number in the same manner as the indoor unit.
• If wiring is not correct, proper operation can not be carried out and controller may be damaged.
  Fix the cable with a clamp.

4 Attaching Drain-Elbow

If the drain-elbow is used, please attach it as figure. (Note: Only for heat pump unit.)

5 Purging Method:To use vacuum pump

1. Detach the service port's cap of 3-way valve, the valve rod's cap for 2-way valve and 3-way's, connect the service port into the projection of charge hose (low) for gaugemanifold. Then connect the projection of charge hose (center) for gaugemanifold into vacuum pump.
2. Open the handle at low in gaugemanifold, operate vacuum pump. If the scale-moves of gausse (low) reach vacuum condition in a moment, check 1. again.
3. Vacuumize for over 15min. And check the level gauge which should read -0.1MPa (76 cm Hg) at low pressure side. After the completion of vacuumizing, close the handle 'Lo' in gaugemanifold and stop the operation of the vacuum pump. Check condition of the scale and hold it for 1-2min. If the scale-moves back in spite of tightening, make flaring work again, the return to the beginning of 3.

4. Open the valve rod for the 2-way valve to an angle of anticlockwise 90 degrees. After 6 seconds, close the 2-way valve and make the inspection of gas leakage.

5. No gas leakage?

In case of gas leakage, tighten parts of pipe connection. If leakage stops, then proceed 6. steps

If it does not stop gas leakage, discharge whole refrigerants from the service port. After flaring work again and vacuumize, fill up prescribed refrigerant from the gas cylinder.

1. Detach the charge hose from the service port, open 2-way valve and 3-way. Turn the valve rod anticlockwise until hitting lightly.
2. To prevent the gas leakage, turn the service port's cap, the valve rod's cap for 2-way valve and 3-way's a little more than the point where the torque increases suddenly.
3. After attaching the each caps, check the gas leakage around the caps.

CAUTION

• If the refrigerant of the air conditioner leaks, it is necessary to discharge all the refrigerant. Vacuumize first, then charge the liquid refrigerant into air conditioner according to the amount marked on the name plate.
• Please do not let other cooling medium, except specified one (R410A), or air enter into the cooling circulation system. Otherwise, there will be abnormal high pressure in the system to make it crack and lead to personal injuries.

1 Power Source Installation

• The power source must be exclusively used for air conditioner. (Over 10A)
• In the case of installing an air conditioner in a moist place, please install an earth leakage breaker.
• For installation in other places, use a circuit breaker as far as possible.

2 Cutting and Flaring Work of Piping

• Pipe cutting is carried out with a pipe cutter and burs must be removed.
  After inserting the flare nut, flaring work is carried out.

Flare tool for R410A		Conventional flare tool
Clutch-type		clutch-type(Rigid-type)	Wing-nut type (Imperial-type)
A	0~0.5mm	1.0~1.5mm	1.5~2.0mm

Flare tooling die

1.Cut pipe

3.Insert the flare nut

2.Remove burs

4.Flare pipe

Correct	Incorrect
	Lean	Damage of flare Crack	Partial	Too outside

3 On Drainage

• Please install the drain hose so as to be downward slope without fail.
• Please don't do the drainage as shown below.

It becomes high midway

The end is immersed in water.

It waves.

The gap with the ground is too sma

There is the bad smell from a ditch

• Please pour water in the drain pan of the indoor unit, and confirm that drainage is carried out surely to outdoor.
• In case that the attached drain hose is in a room, please apply heat insulation to it without fail.

Refrigerant charge label

This product contains fluorinated greenhouse gases covered by the Kyoto Protocol. Do not vent into the atmosphere.

Refrigerant type:R410A

GWP* value:1975

GWP=global warming potential

Please fill in with indelible ink,

• 1 the factory refrigerant charge of the product

• 2 the additional refrigerant amount charged in the field and

• 1+2 the total refrigerant charge

on the refrigerant charge label supplied with the product.

The filled out label must be adhered in the proximity of the product charging port (e.g. onto the inside of the stop value cover).

A contains fluorinated greenhouse gases covered by the Kyoto Protocol

B factory refrigerant charge of the product: see unit name plate
C additional refrigerant amount charged in the field
D total refrigerant charge
E outdoor unit
F refrigerant cylinder and manifold for charging

Check for Installation and Test Run

Please kindly explain to our customers how to operate through the instruction manual.

Check Items for Test Run

Put check mark in boxes

Gas leak from pipe connecting?
Heat insulation of pipe connecting?
Are the connecting wirings of indoor and outdoor firmly inserted to the terminal block?
□Is the connecting wiring of indoor and outdoor firmly fixed?
□Is drainage securely carried out?
Is the earth line securely connected?
□Is the indoor unit securely f
□Is power source voltage abided by the code?
Is there any noise?
Is the lamp normally lighting?
□Are cooling and heating (when in heat pump) performed normally?
Is the operation of room temperature regulator normal?

9. Removal Procedure

9.1 Removal of indoorunit

Procedure

Warning

Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.

Step	Procedure		Points
1. Features
2. Remove the air filters.
1	Hold the front panel by the tabs on the both sides and lift it until it stops with a click.
2	Lift an air filter upwards slightly and then pull it out downwards.		Please embed the air filters into the unit along the grooves as installation. Please embed the two hooks on air filter completely into the unit during installation.

Procedure

Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.

Step	Procedure		Points
1. Remove the front panel.			Please close the panels before start the removal procedure of front grille.Slide the front panel from one side to another to release each axis.When assembling, align the right and left axes with grooves in turn and insert them to the end.
1 Open the front panel until it is on the horizontal position, and then release the pivots on both sides of the unit to remove the front panel.
2	Loosen the marked two screws	HOOKS	When assembling, install the front grille horizontally so as not to stuff the flap inside. When assembling, make sure the three hooks are caught properly.
3	Release the marked three hooks.
4	Pull the front grille out horizontally and remove it.	HOOKS	When assembling, install the front grille horizontally so as not to stuff the flap inside. When assembling, make sure the three hooks are caught properly.

Procedure

Warning

Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.

Step	Procedure		Points
1. Remove the horizontal		■ The horizontal flap is single.
1	Release the center pivot.	■ Installation procedure 1. Since key pattern hook is provided, rotate the flap and fit it to the left pivot first. 2. Fit the flap to the right pivot. 3. Fit the flap to the center pivot.
2	Bend the horizontal blade slightly and remove it.	■ Installation procedure 1. Since key pattern hook is provided, rotate the flap and fit it to the left pivot first. 2. Fit the flap to the right pivot. 3. Fit the flap to the center pivot.

Procedure

Warning

Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.

Step	Procedure		Points
1. Remove the Drain pan.
1	Loosen the marked screws under the screw covers
2	Lift up the lower part of the grille to release the hook on the upper backside.
3	Rotate the upper part of the grille to release the hook on the lower back side. Pull out the drain pan

Procedure

Warning

Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.

Step	Procedure		Points
■ Remove the assembly of the outlet grille.
1. Remove the vertical blades.
1	Push the hooks on the back of the vertical blades and remove.

Procedure

Warning

Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.

Step	Procedure		Points
■ Remove the front grille.		hook	■ Discharge the static electricity from your body before touching the electrical parts like signal receiver PCB. It may cause malfunction of PCB.
1. Remove the electrical box.
2. Lift and remove the electrical box.		hook	■ When assembling, insert the left hook of the drip proof plate into the hem plate of the heat exchanger.

Procedure

Warning

Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.

Step	Procedure		Points
			You can detach the indoor unit without removing the assembly of the outlet grille. Caution If gas leaks, repair the spot of leaking, then collect all refrigerant from the unit. After conducting vacuum drying, recharge proper amount of refrigerant. Caution Do not contaminate any gas (including air) other than the specified refrigerant (R410A), into refrigerant cycle. (Contaminating of air or other gas causes abnormal high pressure in refrigerating cycle, and this results in pipe breakage or personal injuries.)
1	Loosen the screws fixed to the installation plate.
2	Loosen the marked hooks
3	Loosen the marked screws and remove mounting plate
			Pay attention so that the residual water in the drain will not make the floor wet. In case that a drain hose is buried inside a wall, remove it after the drain hose in the wall is pulled out. Use two wrenches to disconnect pipes. When disconnecting pipes, cover every nozzle with caps so as not to let dust and moisture in.
1	Release the hooks
2	Release the hook from the back side. Lift up the lower part of the fixture plate and remove it.
6	Remove the heat exchanger

Procedure

Warning

Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.

Step	Procedure		Points
1. Remove the right side plate.
1	Loosen the 2 screws.
2	Remove the fixing plate.
3. Remove the fan.
1	Loosen the marked screw.
2	Lift up the right part of the fan motor and slide it to the rightward to remove.
3	Lift up the right part of the fan and remove it

9.2 Removal of Outdoorunit

Procedure

Warning

Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.

Step

Procedure

Points

1. Features

handle

• Be careful not to cut your finger by the fins of the heat exchanger.

1 Loosen the screw of the stop valve cover. Pull down the stop valve cover and remove it.

The stop valve cover is united with the shelter.
When assembling, make sure to fit the 5 hooks.

Step	Procedure		Points
2. Remove the panels.
1	Loosen the 4 screws and lift the top panel
2	Loosen the service cover screw and remove the service cover.
		3 Loosen the screws of the panel.
4	Pull and remove the front panel.
3. Remove the outlet grille 1	Unscrew the four marked screws
2	Push the eight hooks on the inside back of front panel,then pull the outlet grille off.

Procedure

Warning

Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.

Step	Procedure		Points
1 Remove the fixing screws Then lift the electrical box

Procedure

Warning

Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.

Step	Procedure		Points
1	Loosen the fixing screw and remove the fan		Put the lead wire through the back of the motor when assembling. (so as not to be entangled with the propeller fan)

Procedure

Warning

Be sure to wait 10 minutes or more before disassembling work.

Step	Procedure		Points
1	Loosen the fixing screws and lift the fan motor bracket.
3	Loosen the 2 screws		■ When assembling ,fit the lower hook into the bottom frame .
4	The partition plate has a hook on the lower side.Lift and pull the partition plate to remove.
5	Loosen the marked fixing screws

Procedure

Warning

Be sure to wait 10 minutes or more after tu before disassembling work.

Step	Procedure		Points
1	Loosen the marked screw.
2	Cut down the connecting pipe and pull out the compressor and remove the valve bracket.

Step	Procedure	Points
3	Loosen the marked fixing screw .
4	Loosen the fixing hook and remove the heat exchanger .

10. Appendix

10.1 Piping Diagrams

Cooling mode
Heating mode

10.2 Wiring Diagrams Indoor

INDOOR WIRING DIAGRAM

0010515158

NOTE:

1. HEAT PUMP

Connecting wire is shown above (including dotted lines)

2.COOLING ONLY

(1) No dotted lines marked with @
(2) The CT(marked with @@) may not be used in some cooling only models.

1. ION GENERATOR

The ion generatormarked with ① )is optional.

W:WHITE

Y/G: YELLOW/GREEN

R:RED

BR:BROWN

B:BLACK

BL:BLUE

Outdoor

WIRING DIAGRAM

0010555053

B:BLACK

R：RED

BR: BROWN

BLUE

W:WHITE

Y: YELLOW

G: GREEN

NOTE:

1. See above for wiring of heat pump type.
   2.There are no dotted lines on cool only type.(marked with @), Wire is connected from "4"(marked with @@) on terminal block to "1".
   3.The ① is optional part

10.3 CIRCUIT DIAGRAM

Description of coding rules of unit model

Examples:

HSU-07RD03/R1,It represents wall-mounted split type heat pump air conditioner.The cooling capacity is 7000BTU/h,and the power supply is 220-230V/50Hz,"D" means the developing sequence,and"R1" means the refrigerant is R407C.

Sincere Forever

Haier Group

Haier Industrial Park, No.1, Haier Road

266101, Qingdao, China_

E-mail: [e-mail]

Tel: [phone]

Http://www.haier.com

Edited by: Liu Ming

Zhang Jing

Signed by: Yang Bifei

Approved by: Wu Hongjin