Carrier Propane Furnace Manual

The Carrier Propane Furnace is a high-efficiency heating system designed for residential use, featuring advanced combustion technology, multiple safety systems, variable-speed blower motor, electronic ignition, and compatibility with standard thermostat controls. Below are key sections for safety, features, installation, setup, operation, maintenance, and troubleshooting.

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

Features at a Glance

Key components: High-efficiency heat exchanger, variable-speed blower, electronic ignition system, pressure switch, flame sensor, gas valve, and control board.

Feature	Description
Heat Exchanger	Stainless steel construction for maximum efficiency
Blower Motor	Variable-speed ECM motor for quiet operation
Ignition System	Hot surface electronic ignition
Gas Valve	Precision propane flow control
Pressure Switch	Ensures proper venting operation
Flame Sensor	Monitors burner flame presence
Control Board	Microprocessor-based system control
Air Filter	Standard 1-inch filter slot
Vent Connection	PVC pipe compatible
Power Supply	120V AC, 60Hz

Installation

Unpack and inspect all components. Ensure proper clearances and ventilation.

Location: Install in well-ventilated area with proper clearances (check specifications).
Gas connection: Use approved propane gas line with shut-off valve.
Venting: Install PVC vent pipes according to local codes.
Electrical: Connect to 120V AC power supply with proper grounding.
Thermostat: Connect low-voltage thermostat wires to control board.

WARNING! Installation must be performed by qualified HVAC technician. Propane gas is flammable and can be explosive.

First-Time Setup

Initial startup and system configuration.

Gas pressure check: Verify propane supply pressure (11-13 inches WC).
Vent verification: Ensure proper draft and venting operation.
Thermostat setup: Program desired temperature settings.
System test: Run through complete heating cycle.
Safety check: Verify all safety systems are functioning properly.

CAUTION! Never bypass safety devices. Always test carbon monoxide detectors after installation.

Specifications

Heating Capacity: 40,000-120,000 BTU/h (model dependent)
Efficiency: Up to 98% AFUE
Fuel Type: Propane Gas
Blower Motor: Variable-speed ECM
Ignition: Hot surface electronic
Venting: PVC pipe (2-3 inch)
Electrical: 120V AC, 60Hz
Controls: 24V thermostat compatible
Dimensions: Varies by model
Warranty: 10-year heat exchanger, 5-year parts

Controls and Settings

Access control board via front panel. LED status lights indicate system operation.

Control Board: POWER switch, diagnostic LED, dip switch settings, terminal connections.

Operating Modes: HEAT, OFF, FAN ON. Blower Settings: Auto/Continuous. Temperature Control: Via thermostat. Diagnostic Codes: LED flash patterns indicate specific errors. Dip Switches: Configure blower timing, heating stages.

Connecting Thermostat

Standard 24V thermostat wiring connections.

Turn off power to furnace at main disconnect.
Remove control board access panel.
Connect thermostat wires: R (24V), W (Heat), G (Fan), C (Common).
Secure connections and replace access panel.
Restore power and test operation.

Tip: Use thermostat compatible with single-stage heating systems.

Operation

Normal heating cycle operation.

Thermostat calls for heat: Sends signal to control board.
Inducer motor: Starts to establish draft.
Pressure switch: Verifies proper venting.
Ignition: Hot surface igniter glows.
Gas valve: Opens to supply propane.
Burner ignition: Flame established and verified.
Blower motor: Starts after heat exchanger warms.
Cycle completion: Thermostat satisfied, system shuts down.

WARNING! Never operate furnace with access panels removed. Keep combustible materials away from unit.

Maintenance

Regular maintenance ensures optimal performance and safety.

Monthly: Check and replace air filter if dirty.
Annual: Professional inspection and cleaning.
Burner inspection: Clean and verify proper flame.
Heat exchanger: Visual inspection for cracks or damage.
Vent system: Check for obstructions or damage.
Electrical: Tighten connections, check wiring.
Safety devices: Test operation of all safety controls.

CAUTION! Always turn off power and gas supply before performing maintenance.

Safety Features

Multiple safety systems protect against hazardous conditions.

Safety Feature	Function
Flame Rollout Switch	Detects burner flame outside combustion chamber
High Limit Switch	Prevents overheating of heat exchanger
Pressure Switch	Ensures proper venting before ignition
Flame Sensor	Confirms burner ignition within safety time
Gas Valve	Automatic shut-off if ignition fails
Ignition Control	Limited trial-for-ignition period

Regulatory Information

UL listed for safety. ANSI Z21.47 compliant. CSA certified. Meets national fuel gas codes. Installation must comply with local building codes. For technical support, contact Carrier at 1-800-CARRIER or visit www.carrier.com.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Furnace won't start	Power, thermostat, door switch	Check power supply; verify thermostat setting; ensure access panels secure.
No heat	Gas supply, ignition, flame sensor	Verify propane supply; check for ignition; clean flame sensor.
Short cycling	Dirty filter, limit switch	Replace air filter; check high limit switch operation.
Blower won't stop	Thermostat, control board	Check thermostat fan setting; inspect control board.
Lockout condition	Safety device tripped	Reset power; check diagnostic LED for error code.

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

Service: 1-800-CARRIER; www.carrier.com