HAI RC-2000 Thermostat — Manual

Full installation instructions for the HAI (Home Automation, Inc.) RC-2000 precision digital thermostat, covering mounting, wiring for all supported HVAC system types, installer configuration settings, and troubleshooting.

Description

The RC-2000 is a 24 VAC thermostat supporting Single Stage Heat/Cool Conventional, Two Stage Conventional (2 Stage Heat / 2 Stage Cool), Heat Pump and Geothermal Heat Pump (2 Stage Heat / 1 Stage Cool), Two Speed Heat Pump and Geothermal Two Speed Heat Pump (3 Stage Heat / 2 Stage Cool), Dual Fuel Heat Pump and Geothermal Dual Fuel Heat Pump systems, plus humidifier/dehumidifier control. It supports local or remote control, programmability, stand-alone operation, and optically isolated communications with automation systems, utility control systems, and PCs.

Electrical rating: 24V, 2A, 50/60Hz. Maximum current: 2A per circuit, 3A total.

Location & Mounting

• Mount 5 feet above the floor and at least 2 feet from an outdoor wall, with adequate air circulation.
• Avoid direct sunlight, radiant heat from appliances, outdoor walls, fireplaces, or air duct paths.
• Disconnect power to the control transformer before removing an existing thermostat or beginning installation.
• Grasp the thermostat by the sides (avoiding the keys) to unsnap the base from the face. Mark and drill two mounting holes (3/16" bit), install the supplied wall anchors, feed system wires through the base opening, and secure with the supplied #6 x 1/2" screws.
• Connect wiring per the diagram for your system type, form the cable flat between the terminal strips and base center, plug excess wiring/wall hole with the supplied insulating foam, then snap the face onto the base.

Wiring by System Type

Single transformer systems: keep the metal jumper between Terminal 1 (RC) and Terminal 2 (RH) in place. Separate heat/cool transformers: remove that jumper.

• Single Stage Conventional: Terminals 1 (RC/24VAC Hot), 3 (C/Common), 6 (W1/Heat), 7 (Y1/Cool), 8 (G/Fan), 11 (H/Humidifier), 12 (D/Dehumidifier). Common wire required for heat-only/cool-only applications.
• Single Stage for Zone Control Systems: Adds Terminal 4 (W2/Heat Mode) and Terminal 10 (Y2/Cool Mode) to control the zone panel's operating mode; set "System Type" to Zone Control.
• Two Stage Conventional: Terminals 1, 3, 4 (W2/Heat 2), 6 (W1/Heat 1), 7 (Y1/Cool 1), 8 (G/Fan), 10 (Y2/Cool 2), 11, 12. Requires "Cool Stages"/"Heat Stages" configuration.
• Heat Pump (2 Stage Heat/1 Stage Cool): Terminal 5 (O) energizes for cooling, Terminal 6 (B) for heating (reversing valve wiring depends on your heat pump's requirement). Terminal 7 (Y1/Compressor), Terminal 4 (W2/Aux Heat), Terminal 9 (L/Fault). Set "System Type" to Heat Pump (or Dual Fuel Heat Pump if W2 connects to the furnace's W/W1).
• Two Speed Heat Pump (3 Stage Heat/2 Stage Cool): Adds Terminal 10 (Y2/Compressor Stage 2) to the heat pump wiring above.

Heat pump notes: With Stage 2 called on a two-speed heat pump, both Y1 and Y2 energize (Stage 2 = high compressor speed, not auxiliary heat — configure 3 heat stages if true auxiliary/emergency heat is needed). Terminal 9 (L) indicates a compressor fault (display flashes red, "Heat Pump Fault"). The Emergency Heat Relay (E terminal) and outdoor thermostats are not used — the RC-2000 manages auxiliary heat automatically; remove any outdoor thermostat from the aux heat circuit.

Dual fuel heat pump notes: Requires an outdoor temperature source (remote sensor or remote system) — without it, only auxiliary heat will run and "Outdoor Sensor Fault" is displayed. Balance Setpoint defaults: above 45°F the heat pump runs exclusively; between 35-45°F the heat pump runs unless it can't heat at ≥5°F/hour (then aux heat takes over); below 35°F aux heat is used exclusively. Adjustable under Installation Settings.

Power-Up & Test Sequence

1. Double-check wiring for stray wires/strands.
2. Connect power — display shows current settings.
3. Press [FAN] → "On" (fan runs), then "Auto" (fan stops).
4. Set Mode to Heat, raise setpoint above current temp — heat should activate (for staged systems, raise further to test Stage 2/Aux Heat; use [HOLD] "On" to override Energy Efficient Control during testing).
5. Set Mode to Cool, lower setpoint below current temp — cooling should activate (test Stage 2 similarly).
6. Set Mode to Off to confirm heat/cool shuts off; re-enable EEC with [HOLD] "Off" when done testing.

Communications Jumper & Remote Systems

The factory-installed communications jumper (J8, "COMM JUMPER") must remain in place when connecting to an HAI Home Control system or remote switch, and must be removed when connecting to a PC or other serial-port device.

• HAI Home Control System: Run 3-4 conductor wire to Ground, Zone +16, and Output 8. Multiple thermostats connect in parallel (home-run or daisy chain). On OmniLT, connect to the GRN/BLK/YEL "TSTAT" terminals.
• Remote Setback Switch: 2-conductor wire to the Black/Green "Comm" terminals; 0VDC = Occupancy Day setpoints, 5-15VDC = Occupancy Night setpoints. Requires "Program Options" set to "Occupancy".
• Remote Temperature Sensor: Twisted-pair shielded cable to the Green/Black "Remote Temp Sensor" terminals (max 250 ft; use polypropylene-insulated cable for 100-150 ft runs, foam-polyethylene for 150-250 ft). Tie shield and one conductor together at the Black terminal.
• Disable Local Control: Remove the thermostat face and pull the local control jumper to disable the Task Buttons and Scroll Wheel.

Installer Setup (Installation Settings Menu)

Access via Scroll Wheel → Setup → Installation Settings → Continue. Auto-exits to Home Page after 3 minutes idle.

• Thermostat Address: 1-127 (default 1) — must be unique per thermostat on a shared remote comm bus.
• Communications Mode: Serial (RS-232, default) or Day/Night (remote setback switch). Baud rates 100/300/1200/2400/9600.
• System Type: Conventional (default), Zone Control, Heat Pump, Dual Fuel Heat Pump, Geothermal Heat Pump, Geothermal Dual Fuel Heat Pump.
• System Mode: Auto Changeover (default), Manual Changeover, Heat Only, Cool Only.
• Program Mode: Schedule (default, time/day-based), None (disable internal schedule, for remote-controlled systems), Occupancy (Day/Night/Away/Vacation status-based, requires remote system/switch).
• Calibration Offset: ±0.5°F / 0.25°C adjustment to the onboard sensor reading (default 0.00).
• Cool/Heat Limits: Cool Setpoint Min default 51°F; Heat Setpoint Max default 91°F.
• Cool/Heat Min On/Off: Minimum run/rest times in minutes (default 6 min each) — cycles/hour = 60 / (Min On + Min Off).
• Stage Settings: Cool Stages and Heat Stages (default 1 each; aux heat counts toward heat stages on heat pumps).
• EEC (Energy Efficient Control): Default 5 (0 disables EEC, maintaining ±0.5°F; 2-3 for slow-reacting sources like radiant heat, 7-8 for fast-reacting like forced air). Also configures 2nd Stage Differential, Auxiliary Heat Differential, and Start Delay depending on system type.
• Anticipator Control: Heat Anticipator and Cool Anticipator (default 5 = automatic; 0-4 for fast systems/humid climates, 6-10 for slow systems/dry climates). 2nd/3rd Stage Extended On (default Off) keeps a triggered stage on until satisfied.
• Temperature Sensors: Internal Sensor (default Enabled), External Sensors 1-3 (default Disabled) — same-type sensors (indoor/outdoor) are averaged.
• Humidity Options: Dehumidifier output = Not Used (default) / Dehumidifier / Fan Speed Control / EM Heat. Humidifier output = Not Used (default) / Humidifier / EM Heat.
• Emergency Heat Options: Reconfigure the H or D terminal to activate during Emergency Heat mode (default None).
• Factory Default: Restores all settings and programming to factory configuration.

Note: Time and Date must be manually set under the thermostat's "Settings" menu even when an HAI controller is present.

Troubleshooting

Warranty

HAI warrants this product against defects in material and workmanship for two (2) years from date of purchase; HAI will repair or replace at its option. Does not cover removal/reinstallation cost, normal wear, damage while in the customer's possession (other than defect-caused), improper installation, alteration, misuse, or abuse. For USA warranty and repair service, send the unit postage-prepaid with a description of the problem to: HAI Repair Department, 4330 Michoud Blvd, New Orleans, LA 70129. See www.homeauto.com for full warranty terms.