Auxiliary Control Box Wiring 48/50AJ,AK,AW,AY020-060 48EJ503076 9 Accessory Board Wiring 48/50AJ,AK,AW,AY020-060 48EJ503086 10 Gas Heat Control Circuit (2-Stage Heat) 48AJ,AK,AW,AY020-050 48EJ503079 11 48AJ,AK,AW,AY060 48EJ503077 12 Gas Heat Control Circuit (Staged Gas Heat) 48AJ,AW020-050 48EJ502488 13 48AJ,AW060 48EJ503078 14 Electric Heat.. schematic diagram (ladder form) legend factory power wiring factory control wiring field control wiring field power wiring conductor on circuit board component connection 1/4 - inch quick connect terminals field splice junction plug receptacle cap connection diagram 1. compressor damage may occur if system is over charged. 2.
Control board HK42FZ034 Wire harness adapter 328151-701 Non-condensing furnace (80% wiring diagram) 328251-101 Rev. A Condensing furnace (90% wiring diagram) 328218-101 Rev. B Service label 327596-101 Rev. B TWINNING The control board in this kitCANNOT be twinned with any of the following circuit boards: HK42FZ004, HK42FZ007, HK42FZ008, HK42FZ009,. wiring diagrams fig. field-installed heater model fb4c fe4a/fe5a fh4c fv4c fx4d fy5b pf4ma pf4mb label 1 kfceh0401n03a 18,24 x 001 x 19,25 18,24 18,19,24,25 x 340816-101 1 kfceh0501n05a 18-60 002-006 001-002 002-006 19-61 18-60 18-61 19-61 340816-101 2 kfceh0801n08a 18-60 002-006 001-003 002-006 19-61 18-60 18-61 19-61 340817-101