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Dometic RV-C Gateway Installation Instructions (DMC32RR)

Dometic Climate Control / RV-C Gateway installation manual (part 3316945.000, Form 3316990.000, Rev. A, 3/18). Networks compatible single-zone CT thermostat AC controls, furnaces, and wall-controlled Fantastic vents so they can be operated from one location. Covers shroud/foam-cover access on Blizzard NXT, Brisk II, and Penguin II, 3-pin pigtail wiring to the AC control board, remote temperature sensor and roof-fan connections, foam-tape mounting, and DIP-switch zone assignment (one gateway per AC, up to four per RV). Not for heat-strip models. This page also includes a dual-AC In-Command field schematic. 11 pages.

DometicDMC32RRRV-C GatewayClimate Control Gateway3316945.0003316990.000single zoneCT thermostatPenguin IIBrisk IIBlizzard NXTFantastic VentIn-Commanddual ACdaisy-chain120 ohmtermination resistorCAN busair conditionerACinstallationRV
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Dual AC with In-Command — field schematic

Simplified field-friendly topology for two Dometic ACs, two RV-C gateways, and an In-Command UI panel. Matches the architecture in the 3316945 installation manual (RV-C 1 / RV-C 2 ports and zone DIP switches) plus standard RV-C practice. Use the manufacturer PDF for official procedures.

Dual Dometic RV air conditioners wiring schematic with RV-C gateways daisy-chained to an In-Command system, CT wall thermostats, and 120 ohm bus termination
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Local connections (per AC)

  • Each gateway connects to its own CT control board with the 3-wire pigtail: Red → +12 V to thermostat, Green/Orange → COM (communication), Black → GND.
  • Each zone still has its own CT wall thermostat wired to its AC control board (same 3-wire set).
  • Leave the To Temp Sensor ports disconnected if a remote sensor is not used.

Network (RV-C)

  • Daisy-chain the two gateways on the RV-C bus: Gateway 1 RV-C 2 → Gateway 2 RV-C 1.
  • Connect one end of the chain to the In-Command RV-C port.
  • Place 120 Ω termination resistors at the two physical ends of the bus, between CAN_H and CAN_L.
  • Use twisted pair for RV-C CAN wiring.

Power and zones

  • Each gateway needs its own 12 V supply and ground, usually taken near that AC. Fuse the +12 V feed (5 A recommended).
  • All grounds (GND) must be common to chassis ground.
  • Set DIP switches so Gateway 1 = Zone 1 (front) and Gateway 2 = Zone 2 (rear).