Lennox G43UF SERIES

ElECTR IC liIICIC HAlAIII. CAN CAUSE
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TO 24 VAC
PO'KR SllIIta:
20 VA lI1NIIIJN
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roNllUCTORS ON. Y. REFER
TO IIlIT RATlNlI P\.All
fDR IIINIIUl CIRCUIT
AJIIACITY AND IIU1U
DVERCURlIEHT PRDTECTION
&IZE.
~ JlM'£R IS USED WHEN m: TS lilT USED
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TllIEO Off TO 24 VAC POIER
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534. 773W
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NOTE- The thermostat used may be electromechanical or electronic.
NOTE- Transformer in indoor unit supplies power (24 VAC) to the thetmostat and outdoor unit controls.
COOLING:
1- Cooling demand in~iates at Y1 in the thermostat.
2- 24VAC from indoor unit (Y1) energizes the TOe timed o1f control (if used) which energizes oontactor K1
(provided 54 high pressure switch is Closed).
3- K1-1 N,D. doses, energizing <Xlll1pressor (B1) and outdoor fan motor (64).
4- Compressor (B1) and outdoor fan motor (84) begin immediate operation ..
END OF COOLING DEMAND:
5- Cooling demand is satisfied. Terminal Y1 Is d6-el1El1'gized .
6- Compressor conlactor K1 is de-energized.
7- K1-1 opens and compressor (B1) end outdOO'" fan motOl' (84) are de-energlzed and stop immediately.
Page 30
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