Figure 78: Cycle flow diagram for simultaneous operation (cooling and heating)
Refrigerant refining method
Note:
Only deionized water may be used as the refrigerant in the chiller-heater.
With an increase in the operation time of the chiller-heater, some of the solution can mix in with
the refrigerant. Mixing the solution and the refrigerant lowers the refrigerating capacity. To prevent
this, the refrigerant must be refined periodically.
Refine the refrigerant according to the following procedure. The chiller-heater must be operating to
refine refrigerant.
When refining refrigerant, operate the absorption chiller-heater under a low load (50% or less) for
higher refining efficiency. Note that the refrigerating capacity is dramatically reduced during the
refrigerant refining operation.
1. Remove the cap of the refrigerant manual blow valve (VB).
Note:
For the location of the refrigerant blow valve, see Figure 75.
2. Turn the spindle in the valve to the left using an 8 mm (0.3 in.) hexagon wrench to start refining
the refrigerant.
Model YHAU-CGN/H-CXR(M)Double Effect Direct Fired Small Absorption Chiller-Heater
152
