Atwood Hydro Flame Furnace Thermostat Manual

The Atwood Hydro Flame Furnace Thermostat is a precision temperature control device designed for RV and marine furnace systems. It features digital temperature display, programmable settings, fan control, temperature calibration, battery power indicator, and compatibility with Hydro Flame furnace models. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting to Furnace 7. Operation 8. Temperature Settings 9. Care & Maintenance 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Digital thermostat display, Temperature control buttons, Mode selection, Fan control, Power indicator, Wiring terminals.

Feature	Description
Digital Display	Shows current temperature and settings
Temperature Control	Precise temperature adjustment in 1° increments
Mode Selection	Heat, Off, and Fan-only modes
Fan Control	Automatic and manual fan operation
Power Indicator	Shows thermostat power status
Wiring Terminals	For furnace connection (R, W, G terminals)
Temperature Calibration	Adjustable temperature offset
Battery Backup	Maintains settings during power loss
LED Indicators	System status and error codes
Mounting Plate	For wall installation

Installation

Unpack and inspect contents. Ensure proper location for accurate temperature reading.

Turn off furnace power: Disconnect main power source before installation.
Mount thermostat: Use provided mounting plate on interior wall away from heat sources.
Connect wiring: Match terminals (R-Red, W-White, G-Green) to furnace control board.
Restore power: Reconnect furnace power and test operation.

WARNING! Always disconnect power before installation. Ensure proper wiring to prevent damage.

First-Time Setup

Power on thermostat; follow initial setup procedure.

Set temperature units: Choose between Fahrenheit and Celsius.
Calibrate temperature: Adjust if display differs from actual room temperature.
Set fan mode: Choose auto or continuous fan operation.
Program temperature limits: Set minimum and maximum operating temperatures.

CAUTION! Ensure thermostat is level and away from drafts for accurate temperature reading.

Specifications

Temperature Range: 40°F to 90°F (4°C to 32°C)
Display: Digital LCD with backlight
Power Requirements: 24V AC from furnace or battery backup
Terminals: R (24V), W (Heat), G (Fan)
Compatibility: Atwood Hydro Flame furnace models 8012, 8516, 8520, 8535
Accuracy: ±1°F (±0.5°C)
Mounting: Wall mount with included hardware
Operating Temp: 32°F to 120°F (0°C to 49°C)

Controls and Settings

Access settings via front panel buttons. Display shows current temperature and mode.

Buttons: MODE (Heat/Off/Fan), UP arrow, DOWN arrow, FAN (Auto/On), SET/HOLD.

Temperature Setting: Use UP/DOWN arrows to set desired temperature. Mode Selection: Heat for furnace operation, Off to turn system off, Fan for fan-only operation. Fan Control: Auto (fan runs with heat), On (continuous fan). Temperature Hold: SET/HOLD maintains current temperature setting. Calibration: Access through hidden menu for temperature offset adjustment.

Connecting to Furnace

Standard 3-wire connection to furnace control board.

Turn off furnace power at main disconnect.
Remove old thermostat if replacing.
Connect R (red) wire to R terminal.
Connect W (white) wire to W terminal.
Connect G (green) wire to G terminal.
Secure wiring and mount thermostat.

Tip: Label wires before disconnecting old thermostat for easy installation.

Operation

Simple operation for daily temperature control.

Set Mode: Press MODE to select Heat, Off, or Fan.
Adjust Temperature: Use UP/DOWN arrows to set desired temperature.
Fan Setting: Press FAN to select Auto or Continuous operation.
Temperature Hold: Press SET/HOLD to maintain current setting.
Monitor: Display shows current room temperature and set point.

WARNING! Do not set temperature below 40°F to prevent furnace damage in cold conditions.

Temperature Settings

Optimal temperature settings for comfort and efficiency.

Daytime: 68°F-72°F (20°C-22°C)
Nighttime: 62°F-66°F (17°C-19°C)
Away: 55°F-60°F (13°C-16°C)
Freeze Protection: 40°F (4°C) minimum

Use temperature setbacks when away to save energy. Allow 30 minutes for temperature stabilization after changes.

Care & Maintenance

Regular maintenance ensures accurate operation and longevity.

Clean display with soft, dry cloth only.
Check wiring connections annually.
Verify temperature accuracy with separate thermometer.
Replace batteries in backup system if applicable.

CAUTION! Never use liquids or abrasive cleaners on display. Disconnect power before cleaning.

Regulatory Information

UL Listed: Complies with UL Standard 873 for temperature indicating and regulating equipment. CSA Certified: Meets Canadian Standards Association requirements. FCC Part 15: Class B digital device compliant. Copyright © Atwood Mobile Products. For technical support, contact Atwood Customer Service at 1-800-888-3378 or visit www.atwoodmobile.com.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Blank display	No power	Check furnace power; verify wiring connections; test voltage at terminals.
Furnace not starting	Thermostat setting/wiring	Ensure mode set to Heat; check temperature setting; verify W terminal connection.
Inaccurate temperature	Location/calibration	Relocate away from heat sources; recalibrate temperature offset.
Fan not operating	Mode setting/wiring	Check fan mode setting; verify G terminal connection; test fan operation at furnace.
Error codes displayed	System fault	Refer to error code chart in furnace manual; reset system power.

Reset: Turn off power for 30 seconds, then restore.

Service: 1-800-888-3378; www.atwoodmobile.com