82
(17) Generator Solution
Temperature Limit Control
As the solution temperature increases, the control system
will limit machine energy input attempting to keep the
chiller operational. Limited energy input to the first-stage
generator begins when the strong solution leaving the
temperature exceeds 315°F.
The control system will enter limit loading from 315 to
325°F; on further temperature increase will:
• hold at 325 to 330°F and
• unload at 330 to 335°F and
• shut down the machine above 335°F.
Operation at or above solution temperatures above 335°F
will cause rapid solution inhibitor depletion and potential
operational problems.
The resulting machine shutdown causes a manual reset-
MMR- diagnostic. The high limit must be cleared and
problem corrected before a restart is attempted. The
control range is fixed in the software.
Figure 32
Shutdown above
335°F
Unloading
Hold
Limited
loading
Unrestricted loading
Strong Solution Temperature Leaving High Temperature
Generator (HTG)
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