Doosan DX225LC, Manual, Page: 118 / 136

Electrical System
Page 117
SP000935
3. If refrigerant does not flow freely into system, try starting
engine first before operating air conditioner.
• Temperature control switch setting: Maximum Cooling
Blower Speed Setting: Hi (3 step)
Engine Speed: 1,300 - 1,500 rpm
4. Open the manifold gauge low side valve and charge
system to standard capacity.
NOTE:
These standards are for outside temperatures
between 30° - 35°C (86° - 95°F). The gauge
readings may vary for extreme temperature
conditions.
5. Close low-pressure side valve.
6. Shut off engine and close refrigerant supply container
adapter valve. Disconnect manifold gauge hoses from
vehicle.
WARNING!
When charging refrigerant system with the engine
running:
• Always keep refrigerant supply container in
the upright position.
• Never open the high side pressure valve.
Gauge Dial Standard Reading
High Side Gauge
13 - 20 kg•cm
2
(185 - 285 psi)
Low Side Gauge
1.5 - 3.5 kg•cm
2
(22 - 50 psi)
WARNING!
• When outside temperature is low, warm the
refrigerant supply container with warm
water not exceeding 40°C (104°F). Do not
allow water to come in contact with the
charging adapter valve handle.
• When outside temperature is high, cool off
refrigerant supply container and condenser
to aid the refrigerant charging process.