SECTION 7 – MAINTENANCE
FORM 155.32-ICOM2.EN.UL
ISSUE DATE:1/10/2018
134
JOHNSON CONTROLS
Figure 67 -
YHAU-CH/AN/H Direct Fired Chiller-Heater with Additional Heat Exchanger
Heating Flow Diagram - Cooling
Table 37 -
YHAU-CG/AN/H Direct Fired Chiller-Heater With Additional Heat Exchanger
Heating Flow Diagram - Cooling
OPERATION
MODE
COOLING / HEATING CHANGEOVER VALVE SETTING
SOL. / REF. PUMP OPERATION
Changeover
Valve
LG ->C Ref
Return
HG Sol
Supply
HG Sol Return LG->C Gas
Vent
LG-> HG Ref
Return
SP1
SP2
RP
Heating
O
O
O
O
ON
ON
ON
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