Haier HSU-71HEK03/R2(DB)/O [7/8] Caution
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Haier HSU-71HEK03/R2(DB)/O [7/8] Caution

Haier HSU-71HEK03/R2(DB)/O [7/8] Caution
CAUTION
If the refrigerant of the air conditioner leaks, it is necessary to reclaim all
the refrigerant, then pull a vacuum BEFORE recharging the refrigerant into
the air conditioner according to the amount marked on the name plate.
Please do not charge with refrigerant, except as (R410A), or
allow air to enter into the cooling circulation system. Otherwise, this may
cause abnormal high pressure in the system which may lead to personal
injuries or damage to piping.
Outdoor unit cont.
2-way valve
3-way valve
Open 90
O
2-way valve
3-way valve
Valve rod cap
Valve rod cap
Service port cap
2-way valve
3-way valve
7
Step 4
Open the 2-way valve to an angle of anticlockwise 90 degrees.
After 6 seconds, close the 2-way valve and test for refrigerant gas leakage.
Step 5
No gas leakage? If ok, proceed to Step 6.
Step 6
Detach the charge hose from the service port, open 2-way valve and 3-way valve.
Turn the valve anticlockwise until closed.
Step 7
To prevent refrigerant leakage, tighten the service port’s taps and caps to ensure
they are
sealed.
Step 8
After the caps, check for refrigerant gas leakage around the caps.
In case of refrigerant leakage, tighten parts of pipe connections. If leakage
stops, then proceed to Step 6.
If this does not stop gas leakage, reclaim all refrigerant from the service
port. After
and repeating vacuuming on the system, with the
prescribed refrigerant level. Check again for leaks.
Close
Step 3
Vacuum for over 15min. Check the (low) gauge which should read
-0.1 MPa (-76 cm Hg) at Iow pressure side. After completion of vacuuming
the system, close the low tap on the manifold and turn off the vacuum pump.
Check the low side gauge to see if it holds for 1-2 min. If the gauge does not
hold pressure, check all the
and return to the beginning of Step 3.
Gauge manifold (for
R410A)
2-way valve Liquid Side
3-way valve Gas Side
Vacuum pump (for R410A)
Tube (for R410A)
5
Evacuation Method: Use vacuum pump
Open
Step 1
Remove the service port cap from the 3 way valve, the valve caps for the
2 way & 3 way valves. Connect hose to the service port (low) side of the
manifold gauge.
Then connect the centre hose from the manifold gauge to the vacuum pump.
Step 2
Open the tap on the low side of the manifold and operate the vacuum pump.
If the gauge (low) reaches a vacuum immediately repeat step 1 above again.
If the drain-elbow is used,
please attach it as
(Note: Only for heat pump unit.)
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.
If wiring is not correct, proper operation can not be carried out and the
controller may be damaged.
Fix the cable with a clamp.
3
Connection of Electrical Cable
4
Attaching Drain-Elbow
4
4
5
3

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