FieldBench
Wiring

ComfortBridge / ComfortNet furnace

1 / 2 data — or 24V

1 / 2 data — or 24V

Goodman / Amana / Daikin communicating two-stage. Outdoor on 1 and 2 when the outdoor talks. A 24V GSX16 still wants Y, not data.

Written circuit description only — FieldBench does not redraw maker schematics. Example: R to W closes on a heat call; verify 24V at W1 before you change the IFC.

Open manufacturer PDF

Heat sequence

  1. 1Power. L1 / N → IFC120V
  2. 2Call. Data pair or 24V W → IFCBus or 24V
  3. 3Draft. IFC → inducer → proveTwo-stage PS or a pressure band
  4. 4Ignite. IFC → HSI → valve120V igniter
  5. 5Blow. IFC → serial ECMNo tap, no cap

Communicating outdoor

GSXC / ASXC / GXV / DZ / FIT on the same bus. CoolCloud or Daikin One at the wall.

CoolCloud / Daikin One

Menus on the indoor. Do not put R/C on 1 and 2.

  • 1DataData
  • 2DataData

ComfortBridge / ComfortNet IFC

Memory card must match THIS cabinet (ARVT96 card is not AMVC96).

  • 1Data to outdoorData
  • 2Data to outdoorData
  • R24V accessories24V
  • CCommon24V

Landing

  • DataIFC 1outdoor 1 · IFC 2outdoor 2

    Data. Polarity matters.

24V outdoor on this IFC

GSX16 / GLXS4B / any contactor outdoor. Land Y. Leave 1/2 empty.

Conventional stat (allowed)

W1/W2/Y/G on the IFC 24V strip. Not on 1/2.

  • RHot24V
  • CCommon24V
  • W1Heat24V
  • YCool24V
  • GFan24V

Landing

  • 24VStat YIFC Youtdoor Y

    ~24 VAC. Data wire is a miswire.

IFC harness — communicating two-stage

Call arrives on the data pair (or 24V W). Gas train is still inducer / prove / igniter / valve.

Transformer + fuse

24V still exists for accessories and for a 24V outdoor. Data pair is not the transformer.

  • L1 / N120VLine
  • R / C24V strip24V
  • FUSEOn the IFC24V

24V safety chain

Limit / rollout / door still open the heat path. Codes are on THIS IFC language.

  • DOORInterlock24V
  • LIMITMain limit24V
  • ROLLOUTManual reset24V

Two-speed inducer + dual PS

Low vs high prove. Do not tee the hoses. Do not apply this to a modulating cousin.

  • IND LO/HITwo-speed inducerLine
  • LPSLow prove24V
  • HPSHigh prove24V

HSI + two-stage valve

Two solenoids or a two-stage valve. Staging is the bus or W1/W2, not a tap.

  • HSI120V igniterLine
  • MV / HV24V low / high solenoids24V
  • FLAMEµA DC24V

Serial variable-speed ECM

IFC talks to the motor on the serial harness. No F-taps. No dual run cap on this blower.

  • SERIALIFC-to-motor harness. Unplugged motor = CFM / comm fault, not a tap problem24V
  • CFMSet in the IFC menu / model plug / CoolCloud — not a dip switch on most of these24V

Landing

  • LineCallIFCinducerprove

    Low then high

  • LineIFCHSIvalve

    120V igniter, 24V or serial valve

  • 24VFlame rodIFC

    µA DC

  • DataIFCserial blower

    No F-taps. No PSC cap.

Prove it

  • Indoor family first. Communicating outdoor = 1/2. Contactor outdoor = Y.
  • Memory card / CoolCloud sees THIS furnace.

Do not

  • Do not drop an ARVT96 card into AMVC96 or the other way around.
  • Do not land 1/2 on a GR9T96.

1 and 2 are the published ComfortBridge / ComfortNet pair.

Plates on this landing