TESY HPWH 2.1 200 U02, Руководство по обслуживанию

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Procedure 9 9. VACUUMING, CHARGING AND DISCHARGING REFRIGERANT
Tools: Screw driver PH2; Pliers; spanner S10; S12; S13; Cutting tool for copper pipe; burner for brazing; brazing rods; vacuum pump; recovery unit; bottles with refrigerant; scales; leak detectors;
pressure hoses; Instrument for parameters check
Risk of electric shock!
Disconnect the HPWH from the main electric supply!
Risk of injuries due to refrigerant vapors!
Discharge refrigerant!
Use special protective gloves for refrigerant and eyeglasses!
Working with an equipment under high pressure!
All activities described below must be done by qualified specialist using a
quality and trouble-free equipment according to the all safety regulation!
1) Switch off the HPWH
2) Disconnect the HPWH from the main electric supply!
DISCHARGING REFRIGERANT
3) Unscrew the protective cap of low-pressure probe (Fig pr.9.1)
4) Connect the high-pressure hose, equipped in both ends with taps to
the probe and to the recovery machine. By the same way connect
recovery machine to the empty bottle for R134a (Fig pr.9.6).
5) Open the tap 1&2 and all others. Then start the recovery machine in
“discharging mode” and use it according to its user manual.
6) When the machine stops, the discharging process is done. Close all
taps and switch off the recovery machine.
7) CLOSE THE TAP OF THE BOTTLE WITH R134a!
VACUUMING:
8) Unscrew the protective cap of high-pressure probe (Fig pr.9.1)
9) Connect the high-pressure hose, equipped in both ends with taps to
the probe and to the vacuuming pump (Taps 1&2; Fig pr.9.2 and
pr.9.3)
10) Open the taps and start the pump. Then the pressure gauge will look
like on (Fig pr.9.4)
11) Wait ~30 min
12) If there is no leakage, after 30 min, the pressure gauge will look like
on (Fig pr.9.5)
13) Close the tap of the pump and check if there is leakage (if there is a
leakage the black arrow will move back)
14) If there is no leakage, the vacuuming process is done. Close the tap
1. Stop the vacuuming pump.
Fig: pr.9.1:
Fig: pr.9.2: Fig: pr.9.3:
Fig: pr.9.4: Fig: pr.9.5:
High pressure
probe
5/16” SAE
Low pressure
probe
5/16” SAE
Tap 1
Tap 2