Mi-T-M EH-2303-0M30, Руководство оператора

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9
SERVICE AND MAINTENANCE
Before carrying out maintenance work or repairs, disconnect the plug from the power supply.
MAINTENANCE SCHEDULE:
WEEKLY:
Check the oil level of the high pressure pump. If the oil is milky or the oil level is below the minimum
mark, change or fill with SAE 20W or 30W non-detergent oil.
YEARLY:
Oil Change: Remove the drain plug of the water pump, drain the oil, and clean and replace the drain
plug. Fill oil up to the red dot inside the oil glass (Use SAE 20W or 30W non-detergent oil).
Coil Maintenance: Liming of the coils is caused by mineral deposits from the water and occurs in
hard water areas. The deliming procedure requires special caution and tools. It is recommended
that the local service person is contacted if problems arise.
Checking For Scale or Liming in Coil
1. Remove outlet orifice and check for liming. Clean orifice if needed.
2. Remove outlet gun.
3. Install a pressure gauge between the water pump and coil inlet.
4. Check condition of your water pump and unloader valve. Water pump and unloader valve
failure will cause low pressure readings.
5. Turn on pump without water outlet gun or outlet orifice. If pressure reading is above 50 psi,
have your machine descaled.
6. If your machine is satisfactory, reassemble.
Descaling: If pressure drop of over 50 psi is experienced in the coil, descaling is recommended.
Descaling requires the use of highly corrosive chemicals as well as the use of special protective
clothing.
1. Have a 20L pail of descaling chemical available.
2. Plumb the pump section into the pail of descaling compound with a screen on the end of
the suction line.
3. Plumb a hose from the machine outlet back into the pail of descaling compound.
4. Turn the pump on and circulate the compound through the machine for about 20 minutes.
5. After that time the chemical being pumped out of the coil should be running thin and dirty
rather than foaming heavily.
6. Remove the extra plumbing and reconnect machine together and run clean cold water
through the machine for five minutes.