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Lennox CHA16-024 Service Manual

Lennox CHA16-024 Service Manual

Cha series; chp16 series; chp20 series

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Service Literature
Page 1

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Summary of Contents for Lennox CHA16-024

  • Page 1 Service Literature  Page 1...
  • Page 9 " " " "...
  • Page 18 NOTE-Contactor K1 is energized by the thermostat control system. Depending on the control system installed, the contactor may or may not be immediately energized upon demand.
  • Page 20 Gently...
  • Page 21 NOTE - Control will not go into test mode when discon nected from unit. Unit load must be applied to control termi nals before the control will go into test mode.
  • Page 22 É É É É É É É É É É É É É É É É É É É É É É É É É É É É É É É É É É É É É É É É É...
  • Page 26 MOVEMENT OF ORBIT...
  • Page 27 ° ° ° ° ° °...
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  • Page 43 NOTE - The compressor noise level will be significantly higher when phasing is incorrect and will not provide cooling when operating backwards.
  • Page 44 CAUTION-Use the same thermometer for both temperature readings. 208-230 Volt Units - 460-575 Volt Units- IMPORTANT To prevent motor burnout, never connect more than one motor lead to any one connection. Black and blue motor taps must be connected together when operating on low or medium speeds.
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  • Page 49 ° ° ° ° If the enthalpy control is set at setpoint A" as shown in figure 24, the following situation could occur. A cooling demand when the outside air is at 75° and 20 percent hu midity would drive the economizer outdoor air dampers open to utilize outdoor air for cooling.
  • Page 50 NOTE - Some electronic thermostats have built in time delay. Field installed time delay is not needed on these applications. ° Page 50...
  • Page 51 NOTE - COMPRESSOR MONITOR CANNOT BE DIFFERENCE (set by knob) = CUT-IN POINT (fixed) minus CUT-OUT POINT USED WITH OPTIONAL LOW AMBIENT KIT. OP TIONAL FIELD INSTALLED COMPRESSOR MONI TOR MUST BE DISCONNECTED BEFORE ALLOW ING LOW AMBIENT KIT TO BE USED. does not Page 51...
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  • Page 60 NOTE - Call for heat is first stage heat for CHA16 units and second stage heat for CHP16/20 units. Page 60...
  • Page 61 NOTE - Call for heat is first stage heat for CHA16 units and second stage heat for CHP16/20 units. Page 61...
  • Page 62 NOTE - Call for heat is first stage heat for CHA16 units and second stage heat for CHP16/20 units. Page 62...
  • Page 63 NOTE - Call for heat is first stage heat for CHA16 units and second stage heat for CHP16/20 units. Page 63...
  • Page 64 NOTE - Call for heat is first stage heat for CHA16 units and second stage heat for CHP16/20 units. Page 64...
  • Page 65 NOTE - Call for heat is first stage heat for CHA16 units and second stage heat for CHP16/20 units. Page 65...