Yazaki - Gas Fired Double-Effect Chiller-Heaters


CH-MG Series: 150 and 200 RT Cooling Capacities


Typical Piping & Field Wiring




Typical Piping


Typical Field Wiring


STANDARD JUNCTION BOX (JB) CONNECTIONS
  • Power supply.
  • Chilled/hot water and cooling water pump control.
  • Thermal overload interlocks from chilled/hot water pump, cooling water pump and cooling tower fan.
OPTIONAL JUNCTION BOX (JB) CONNECTIONS
  • Remote cooling/heating mode selection.
  • Remote start/stop selection.
  • Cooling tower fan control output (Alternative to CTS).
OPTIONAL CONTROL BOX (CB) CONNECTIONS
  • Cooling/heating mode status.
  • Chiller-heater operating status.
  • Chiller-heater standby status.
  • Dilution cycle status.
  • Burner operating status.
  • General shutdown alarm output.
  • External fault alarm output.
  • Main fault alarm output.
  • Burner flame failure alarm.
  • External fault interlock (Additional control supplied by others).
  • Earthquake switch shutdown.
  • Remote temperature control 4.5˚F setup/setback.
  • Cooling water flow switch (FS2)
    input (Flow switch supplied by
    others).
  • Freeze protection switch (IF1)
    input for chilled/hot water (Temp. switch supplied by others).
  • Freeze protection switch (IF2)
    input for cooling water (Temp.
    switch supplied by others).
  • Exhaust fan control output.
  • Exhaust fan interlock.
  • Cooling tower sump level switch
    (LS).