Johnson Controls York YHAU-C - Page 5

Stopping the chiller......................................................................................................................... 100
Operation.................................................................................................................................... 113
YHAU-C control center.................................................................................................................... 113
Common items................................................................................................................................ 113
Change numeric values.................................................................................................................. 116
Operating status.............................................................................................................................. 117
Failure............................................................................................................................................... 133
Alarm................................................................................................................................................. 133
Control parameter........................................................................................................................... 137
Valve operation................................................................................................................................ 138
Date and time.................................................................................................................................. 139
Select language............................................................................................................................... 140
Safety switches................................................................................................................................ 141
Maintenance............................................................................................................................... 142
Valve inspection............................................................................................................................... 142
Solenoid valves................................................................................................................................ 142
Pump shut off valves...................................................................................................................... 142
Air purge valves and drain valves for chilled water, and cooling water................................... 143
Purge valves..................................................................................................................................... 143
Starting the chiller after it has been stopped for a long period................................................ 143
Checks before operation starts........................................................................................... 143
Checks after operation starts.............................................................................................. 143
Purge procedure.............................................................................................................................. 143
Capacity check method of vacuum pump.................................................................................... 144
Manual method to purge air directly from absorber................................................................. 145
Manual method to purge non-condensable gas from purging tank........................................ 146
Automatic method to purge non-condensable gas from purging tank................................... 147
Refrigerant refining method.......................................................................................................... 149
Manual refrigerant blowdown and diluting method.................................................................. 150
iiiYHAU-C Single Effect Steam-Fired Absorption Chiller