Smart Thermostat Installation, Wiring & Setup

Safety First — Turn OFF power to HVAC at the circuit breaker before installing or servicing. Leave power off until installation is complete. Do not short furnace/AC terminals to test. Follow local codes. Use only two AAA alkaline batteries or a listed Class 2 24 VAC supply. Do not use on high-voltage (120/240 V) systems—contact an HVAC professional.

Box Contents & Recommended Tools

Thermostat Overview

Preparation

1. Test existing system from old thermostat (do not short terminals).
2. Turn power OFF at HVAC breakers.
3. Remove old thermostat cover (leave wires connected), label and photograph wiring, then disconnect & secure wires so they don’t fall into wall.
4. Verify 24 VAC system (18–24 AWG conductors; ~¼″ stripped, straight).

Mount Back Plate

1. Use built-in bubble level; mark holes.
2. (Optional) Install trim plate first to cover old marks.
3. Drill 3/16″, set anchors, and fasten back plate.

Wiring

Caution: If extra/unidentified wires exist, do not land them—contact an HVAC professional. Confirm 24 VAC only. If your system has separate RC and RH wires, no jumper is needed. If you have a single R, land on RC or RH and select that terminal during setup (digital jumper is created).

Two-wire hydronic heat: install the included power resistor between C and W at the equipment (not at thermostat) if prompted.

Power & Batteries

• Power via 24 VAC C-wire or two AAA alkaline batteries (batteries recommended as backup).
• If using a wall transformer, connect between C and RH for heat-only or cool-only systems, with jumper removed to the unused R.
• Battery warnings: Replace at first “LOW BATTERY” alert; yearly as preventive; immediately if buttons flash amber with no screen. Always use new alkaline cells.

Attach Thermostat

1. Tuck excess wire into wall; align pins carefully.
2. Press thermostat body firmly onto back plate (flush fit).

Restore Power & Guided Setup

1. Turn breakers back on.
2. Follow on-screen prompts; auto-detect wiring.

Heat type: Electric (fan on by stat) vs Fossil (fan by furnace). Backup heat: Electric vs Dual Fuel. Z1/Z2: assign W3/H/DH/EX as needed.

Z-Wave Enrollment

1. Put the Z-Wave controller in Add mode.
2. On thermostat: MENU → SETTINGS → NETWORK → ADD.
3. S2 controllers: enroll as S2; enter the first five DSK digits when prompted.
4. Sync to customer account via the website/app after inclusion.

Configure Features

Operation

• Wake: press any button. Mode/setpoint: MENU → MODE, then ▲/▼.
• Fan: MENU → FAN MODE (AUTO/ON/CIRCULATE).
• Emergency heat (heat pumps): select EMER under mode.

System Check (Mild Weather Recommended)

Troubleshooting

• No heat/cool when expected — Increase delta ≥2°, wait 5 min (compressor delay). If still off, contact HVAC.
• Heat pump heats/cools backwards — Move reversing valve wire between O ↔ B and reconfigure.
• Buttons flash amber; screen dark — Batteries critically low; replace immediately.
• Auto wire-detect incorrect — Bypass: MENU → SETTINGS → INSTALLER → CONTINUE → RECONFIG → YES, choose RC/RH, then Check Wiring and Reinstall → BYPASS and configure manually.
• Safety Delay / System Protect — Built-in anti-short-cycle. Frequent delays: move R from RH to RC for cooling, or add isolation relay (e.g., 24 V fan/compressor relay). If persistent, consult HVAC.
• Power Resistor Required — Install 1 kΩ, ½ W across hydronic valve terminals (e.g., Taco 1 & 2) at equipment.
• Isolation relay required — Overcurrent detected on W/Y/G; isolate with a 24 V coil relay and re-test.
• Z-Wave repeater inactive — Thermostat repeats only if added to network while powered by common (C). Remove & re-add after connecting C.

Network Management

• Remove from Z-Wave: Controller in Remove mode → MENU → SETTINGS → NETWORK → REMOVE.
• Factory Reset: MENU → SETTINGS → INSTALLER → RESET (removes Z-Wave & clears all settings). Best practice: remove from network first, then reset.

Notices