Table of Contents
Advertisement
Considerations
In cold areas (where the lowest outside temperature drops below freezing), if power is not supplied while
the unit is stopped during winter, make sure to completely drain water from the piping. Failure to do so
may cause the residual water to freeze, resulting in damage to the heat exchanger.
Before using the unit, perform a test run such as water fill test or air bleeding test again.
Drainage method
Procedure
1. Disconnect the outlet pipe.
2. Disconnect the inlet pipe.
3. Open the drain trap at the T-shaped part.
4. Completely remove water by blowing compressed air or nitrogen (cylinder) of 0.5 to 0.6 MPa into the
outlet pipe.
If the water circulation pump is connected differently from the recommended way, make sure the circuit
has some type of anti-freeze function. Glycol is NOT recommended due to change in
viscosity/temperature relationship and the decomposition at high temperatures.
43
Advertisement
Table of Contents
