crane co conditioner furnace 70 cjd manual

The Crane Co Conditioner Furnace 70 CJD is a high-efficiency heating and cooling unit designed for residential and light commercial use. This manual covers the Model 70 CJD series with features including multi-stage heating, variable speed blower, electronic ignition, built-in diagnostics, energy-saving modes, and compatibility with various thermostat systems. Below are comprehensive sections covering safety guidelines, technical specifications, installation procedures, operation instructions, maintenance schedules, and troubleshooting guidance.

1. Features at a Glance 2. Installation Requirements 3. First-Time Setup 4. Technical Specifications 5. Controls and Operation 6. Maintenance Procedures 7. Seasonal Operation 8. Safety Features 9. Care & Maintenance 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Multi-stage gas valve, variable speed ECM blower motor, electronic ignition system, aluminized steel heat exchanger, built-in diagnostic LED, filter access panel, flue outlet, and service ports.

Feature	Description
Multi-stage heating	Provides efficient temperature control with multiple firing rates
Variable speed blower	ECM motor for quiet operation and energy efficiency
Electronic ignition	Hot surface igniter for reliable startup
Aluminized steel heat exchanger	Durable corrosion-resistant construction
Diagnostic LED	Flashing codes for system status and error identification
Filter access panel	Easy access for regular filter changes
Service ports	Pressure test ports for service technicians
Flue outlet	Standard 4-inch vent connection
Gas valve	Multi-port gas control with safety shutoff
Blower compartment	Insulated for quiet operation

Installation Requirements

Professional installation required. Verify local codes and obtain necessary permits.

Location requirements: Install in level, clean, dry area with proper clearances (24 inches front, 6 inches sides, 12 inches rear).
Gas connection: Use black iron pipe with drip leg; pressure test for leaks.
Electrical connection: 120V AC, 60Hz dedicated circuit with proper grounding.
Venting: Category I venting with proper slope and termination clearances.
Condensate drain: Properly trap and route to approved drain location.

WARNING! Gas appliances can produce carbon monoxide. Proper ventilation and combustion air required. Installation must comply with local codes and manufacturer specifications.

First-Time Setup

After installation, perform initial startup and system verification.

Gas pressure verification: Check incoming and manifold pressures per specifications.
Vent verification: Confirm proper draft and venting operation.
Electrical verification: Verify proper voltage and grounding.
Thermostat configuration: Program for proper staging and fan control.
System test: Run through complete heating cycle to verify operation.

CAUTION! Only qualified technicians should perform initial startup and gas pressure adjustments.

Technical Specifications

Model Series: 70 CJD
Heating Capacity: 70,000 BTU/H input
Efficiency: Up to 96% AFUE
Gas Type: Natural gas (convertible to LP with kit)
Electrical: 120V AC, 60Hz, 5.8 amps
Blower Motor: Variable speed ECM
Heat Exchanger: Aluminized steel tubular
Venting: Category I, 4-inch diameter
Dimensions: 34" H x 17.5" W x 26" D
Weight: 98 lbs

Controls and Operation

Integrated control board manages all furnace functions with diagnostic capabilities.

Control Board Features: LED status indicator, dip switch settings, terminal strip for thermostat connections, fuse protection.

Operation Modes: Heating mode with multi-stage operation, continuous fan mode, diagnostic mode. LED Codes: Steady green (normal operation), flashing codes indicate specific faults (1 flash pressure switch, 2 flashes ignition failure, etc.). Thermostat Compatibility: Works with conventional and programmable thermostats; supports multi-stage heating and continuous fan.

Maintenance Procedures

Regular maintenance ensures optimal performance and longevity.

Monthly: Check and replace air filter if dirty.
Seasonal: Inspect burners, heat exchanger, and vent system.
Annual: Professional inspection including gas pressure, electrical components, and safety controls.
Blower maintenance: Clean blower wheel and housing annually.
Drain system: Clear condensate trap and drain lines.

Tip: Keep area around furnace clear of combustible materials and maintain proper airflow.

Seasonal Operation

Proper operation for heating season and off-season storage.

Heating season startup: Verify thermostat settings, check filter, test system operation.
Regular operation: Monitor for unusual noises or odors.
Off-season: Consider shutting off gas supply if not used for extended periods.
Summer operation: Use continuous fan mode for air circulation if compatible with system.
System shutdown: Follow proper procedures if decommissioning for season.

WARNING! Never operate furnace without proper venting and combustion air. Carbon monoxide hazard exists if improperly operated.

Safety Features

Multiple safety systems protect against hazardous conditions. Flame rollout switch: Shuts off gas if flame detected outside burners. High limit switch: Prevents overheating by shutting off burners. Pressure switch: Ensures proper venting before ignition. Ignition control: Safety shutdown after multiple ignition attempts. Gas valve: Automatic shutoff in case of system fault.

Care & Maintenance

Regular care ensures safe and efficient operation. Keep unit clean and free of debris. Replace air filters regularly (1-3 months). Schedule annual professional maintenance. Keep combustion air intake clear. Monitor for unusual sounds or odors.

CAUTION! Turn off electrical power and gas supply before performing any maintenance. Only qualified technicians should service gas and electrical components.

Regulatory Information

ANSI Z21.47: Certified for natural gas operation. CSA International: Listed for safety standards. UL certification: Electrical components meet safety requirements. Installation must comply with National Fuel Gas Code NFPA 54 and local building codes. For technical support, contact Crane Co at 1-800-XXX-XXXX or visit www.craneco.com.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Furnace won't start	Power supply/thermostat	Check circuit breaker; verify thermostat settings and batteries.
No heat	Gas supply/ignition	Verify gas valve on; check for ignition attempts; inspect filter.
Short cycling	Dirty filter/overheating	Replace air filter; check for blocked vents or registers.
Blower not running	Motor/control board	Check blower door switch; verify control board operation.
Unusual noises	Mechanical issues	Inspect blower wheel; check for loose components; call for service.

Reset Procedure: Turn thermostat off, wait 30 seconds, turn back on. For lockout conditions, turn power off for 5 minutes then restore.

Service: 1-800-XXX-XXXX; www.craneco.com