• The following button is lit and the solution pump trips:
-
Sol. Circu P. Abnormal
• The solution level can be seen through the level gauges on the high temperature generator.
• The liquid level in the absorber is low and the solution level can be seen through the generator
level gauges (G104) white.
• The liquid level in the absorber falls and the temperature of the solution returning from the
generator is drops.
Decrystallization
1. Stop the chiller-heater. If the solution pump tripped, reset the thermal relay.
2. Disconnect the electrical wiring of the solution pump.
3. Navigate to the Setting screen on the Control Panel.
4. Press the Forced Dilution
ON
button.
Note:
As the electrical wiring of the solution pump is disconnected, only the refrigerant
pump starts.
5. Remove the cap of the refrigerant manual blow-down valve (VB).
Note:
For the location of the refrigerant manual blow valve, see Figure 75.
6. Turn the spindle in the valve to the left with the 8 mm (0.3 in.) hexagon wrench.
Note:
The refrigerant in the refrigerant tank diverts into the absorber.
7. Watch the liquid level of the refrigerant tank.
8. Immediately after the refrigerant liquid level appears in the level gauge of the refrigerant tank,
close the refrigerant manual blow-down valve (turn it to the right until it stops).
9. Press the Refrigerant Pump
Stop
button. The refrigerant pump stops.
10. Press the Forced Dilution
OFF
button.
11. Re-connect the electrical wiring of the solution pump.
12. Press the Forced Dilution
ON
button. The solution pump starts.
13. Press the Control Valve Mode
Manual
button which is in the maintenance interface.
14. Set the Valve Position Setting to 30% to 40%. For detailed information on how to change the
setting, see
.
15. Observe the liquid level in the absorber.
16. When the liquid level in the absorber drops, press the Forced Dilution
OFF
button.
Model YHAU-CGN/H-CXR(M)Double Effect Direct Fired Small Absorption Chiller-Heater
154
