Arcoaire RPJ II Furnace Manual

The Arcoaire RPJ II is a high-efficiency gas furnace series designed for residential heating applications. This manual covers installation, operation, maintenance, and troubleshooting for RPJ II models with various BTU capacities. Features include multi-speed blower motors, electronic ignition systems, heat exchanger technology, safety controls, and compatibility with standard thermostats. Below are key sections for safety, installation, operation, maintenance, and technical specifications.

1. Features at a Glance 2. Installation Requirements 3. First-Time Setup 4. Technical Specifications 5. Controls and Operation 6. Maintenance Procedures 7. Troubleshooting Guide 8. Safety Information 9. Warranty Information

Features at a Glance

Key components: Heat exchanger, blower assembly, gas valve, burners, ignition system, safety controls, venting system.

Feature	Description
Heat Exchanger	Stainless steel construction for durability and efficiency
Blower Motor	Multi-speed ECM motor for optimal airflow
Ignition System	Hot surface ignition for reliable startup
Gas Valve	Precise gas flow regulation
Safety Controls	Limit switches, pressure switches, flame sensor
Venting	PVC pipe compatible for sidewall or roof venting
Filter System	Standard 1-inch or 4-inch media filter compatibility
Thermostat Connection	Standard 24V connections
Diagnostic LED	Error code display for troubleshooting
AFUE Rating	Up to 96% Annual Fuel Utilization Efficiency

Installation Requirements

Professional installation required. Verify local codes and obtain permits.

Location: Install in dry, clean area with adequate clearance and combustion air.
Gas Connection: Use approved gas piping; pressure test for leaks.
Electrical: 120V AC power supply with proper grounding.
Venting: Install PVC vent pipes according to manufacturer specifications.
Drainage: Connect condensate drain line to proper disposal.

WARNING! Gas appliances can be hazardous if improperly installed. Use qualified HVAC technician.

First-Time Setup

After installation, perform initial startup procedure.

Verify all connections: Gas, electrical, venting, drainage.
Install air filter: Ensure proper size and orientation.
Gas pressure check: Adjust manifold pressure per specifications.
Startup sequence: Power on furnace; observe ignition cycle.
Temperature rise: Measure and verify within specified range.
Thermostat programming: Set heating schedule and temperature limits.

CAUTION! Never bypass safety controls. Test carbon monoxide detectors.

Technical Specifications

Models: RPJ II series (40,000 to 120,000 BTU/hr)
AFUE: Up to 96% efficiency
Gas Type: Natural gas (LP conversion kit available)
Electrical: 120V AC, 60Hz, 15 amp circuit
Blower Speeds: Multiple taps for airflow adjustment
Static Pressure: 0.1 to 0.8 inches water column
Temperature Rise: 35°F to 65°F (varies by model)
Vent Size: 2-inch or 3-inch PVC
Dimensions: Varies by model (check specific model data)
Warranty: Limited lifetime heat exchanger, 10 years parts

Controls and Operation

Integrated control board manages all furnace functions with diagnostic capabilities.

Control Board: LED status light indicates operating mode and error codes.

Operation Modes: Heating cycle, blower operation, safety monitoring. Thermostat Settings: Heat/Off mode, fan auto/on, temperature setpoint. Safety Features: Flame rollout switch, high limit switch, pressure switch, flame sensor. Diagnostic Codes: Flash patterns indicate specific issues for troubleshooting.

Maintenance Procedures

Regular maintenance ensures optimal performance and safety.

Monthly: Check and replace air filter as needed.
Seasonal: Inspect vent system for obstructions.
Annual Professional Service: Clean burners, heat exchanger, blower assembly.
Check gas connections and pressure.
Verify safety controls operation.
Lubricate blower motor if required (check specifications).

Tip: Keep area around furnace clear of combustible materials.

Troubleshooting Guide

Symptom	Possible Cause	Corrective Action
Furnace won't start	Power, thermostat, door switch	Check circuit breaker, thermostat settings, door switch engagement
No heat	Gas supply, ignition, filter	Verify gas valve on, check for spark/flame, replace dirty filter
Short cycling	Filter, limit switch, airflow	Clean/replace filter, check for blocked vents, verify proper airflow
Blower won't stop	Thermostat, control board	Check thermostat fan setting, control board relay
Error code flashing	Various system faults	Refer to diagnostic chart in service manual

Reset: Power cycle furnace if safe to do so.

Service: Contact qualified HVAC technician for complex issues.

Safety Information

Carbon monoxide hazard: Ensure proper venting and combustion air. Install CO detectors near sleeping areas.

WARNING! Gas leaks can cause explosion or fire. If you smell gas, evacuate immediately and call gas company.

Fire hazard: Keep combustible materials away from furnace. Electrical shock hazard: Disconnect power before servicing.

Warranty Information

Limited lifetime warranty on heat exchanger. 10-year limited warranty on functional parts. 1-year labor warranty when installed by certified technician. Registration required within 60 days of installation. For warranty claims, contact authorized Arcoaire dealer with proof of purchase and installation date.