Gas Fired Double-Effect Chiller-Heaters
CH-K Series: 30, 40, 50, 60, 80, 100 RT Cooling with Standard Heating Capacities
Performance Characteristics
Gas Fired Performance: Maximizing Energy Efficiency with Fuel Switching and Cogeneration
Low Fire Sequence of Operation:
When LCWT rises to 45.5°F, the burner will fire at Low Fire. If the
LCWT temperature continues to rise, the burner will stage up to High
Fire at 50.9°F. Otherwise, the burner will shut down when the LCWT
reaches 41.9°F.
High Fire Sequence of Operation:
When the LCWT increases to 50.9°F (adjustable to 47.3°F) the burner
goes up to High Fire. It will continue to burn in High Fire until the
LCWT reaches 43.7°F at which time the burner will drop back into
Low Fire and again follow the Low Fire Sequence of Operation.
Low Fire Sequence of Operation:
When LHWT falls to 130.1°F, the burner will fire at Low Fire. If the
LHWT temperature continues to fall, the burner will stage up to
High Fire at 124.7°F. Otherwise, the burner will shut down when the
LHWT reaches 133.7°F.
High Fire Sequence of Operation:
When the LHWT falls to 124.7°F (adjustable to 128.3°F), the burner
goes up to High Fire. It will continue to burn in High Fire until
LHWT reaches 131.9°F at which time the burner will drop back into
Low Fire and again follow the Low Fire Sequence of Operation.
- Standard Design Set Point. This is the temperature that will be held when load exactly equals rated capacity. Cooling Set Point can be adjusted 1.8°F down or 16.2°F up from standard set point. Heating Set Point can be adjusted 12.6°F down or 5.4°F up from standard set point.