Daikin Furnace DC96VC Installation Manual

The Daikin Furnace DC96VC is a high-efficiency gas furnace with variable-capacity operation, 96% AFUE rating, two-stage gas valve, variable-speed blower motor, durable heat exchanger, diagnostic LED system, and compatibility with Daikin thermostats. Designed for residential use with natural gas or propane, it requires professional installation. Below are key sections for safety, specifications, installation procedures, wiring, startup, and troubleshooting.

1. Safety Precautions 2. Specifications 3. Pre-Installation Requirements 4. Installation Procedures 5. Electrical Wiring 6. Gas Line Connection 7. Venting System 8. Startup and Commissioning 9. System Configuration 10. Maintenance Guidelines 11. Troubleshooting

Safety Precautions

Critical safety information for installers and homeowners.

Hazard	Precaution
Gas Leaks	Check all connections with leak detector; never use open flame
Electrical Shock	Disconnect power before servicing; follow local electrical codes
Carbon Monoxide	Ensure proper venting; install CO detectors in living areas
Fire Hazard	Maintain clearance from combustibles; install smoke detectors
Personal Injury	Wear safety glasses and gloves during installation

Specifications

Model: DC96VC
AFUE Rating: 96%
Input Capacity: 40,000 to 120,000 BTU/h (multiple sizes)
Gas Type: Natural gas or propane (conversion kit required)
Electrical: 115V/60Hz/1Ph
Static Pressure: 0.1 to 0.9 in. w.c.
Venting: PVC pipe (2" or 3" diameter)
Dimensions: Varies by model (check specific unit)
Warranty: Limited lifetime heat exchanger, 10 years parts

Pre-Installation Requirements

Site preparation and necessary tools/materials.

Location: Indoor installation only; protected from weather
Clearance: Minimum 1" from combustible materials
Foundation: Level, solid surface capable of supporting unit weight
Gas Supply: Adequate pressure and volume; shut-off valve required
Electrical: Dedicated 115V circuit with proper grounding
Venting: Plan route for intake and exhaust pipes

WARNING! Installation must comply with local codes and regulations.

Installation Procedures

Step-by-step installation guide.

Position unit: Place on level surface in designated location
Ductwork connection: Attach supply and return ducts securely
Gas line: Connect to gas supply with approved piping
Venting: Install PVC intake and exhaust pipes per manual
Electrical: Connect power and thermostat wiring
Condensate drain: Install drain line with proper slope
Final inspection: Verify all connections are secure

CAUTION! Use two people for lifting; unit is heavy.

Electrical Wiring

Wiring connections and requirements.

Connection	Specification
Power Supply	115V, 60Hz, 15A circuit with disconnect
Thermostat	Standard 24V connections (R, W, Y, G, C)
Blower Motor	Variable-speed ECM motor
Control Board	Integrated diagnostic LED system
Grounding	Proper equipment grounding required

Tip: Label all wires before disconnecting existing equipment.

Gas Line Connection

Gas piping and pressure requirements.

Shut off gas supply at main valve
Install sediment trap in gas line
Use approved gas pipe (black iron or CSST)
Apply pipe compound to male threads only
Connect to furnace gas valve with union fitting
Check for leaks with bubble solution or detector
Verify gas pressure: 3.5" w.c. natural gas, 10" w.c. propane

WARNING! Gas line installation must be performed by qualified technician.

Venting System

Intake and exhaust vent installation.

Material: Schedule 40 PVC, CPVC, or ABS pipe
Size: 2" or 3" diameter as specified for model
Slope: 1/4" per foot toward furnace for condensate drainage
Termination: Minimum 12" above ground level, 3' from openings
Clearances: Follow local code requirements for proximity to windows/doors

CAUTION! Do not use cellular core PVC; ensure proper support for long runs.

Startup and Commissioning

Initial system startup procedure.

Verify all connections are complete and secure
Open gas shut-off valve slowly
Restore electrical power to furnace
Set thermostat to heat mode above room temperature
Observe ignition sequence: inducer motor, igniter, gas valve
Check flame appearance: steady blue flame with yellow tips
Measure temperature rise: 35-65°F across heat exchanger
Verify proper airflow and duct temperatures

System Configuration

Control settings and adjustments.

Setting	Description
Blower Speed	Adjust for proper airflow (CFM settings)
Gas Pressure	Verify high and low fire settings
Thermostat Type	Compatible with single-stage and two-stage thermostats
Diagnostic Codes	LED flash patterns for troubleshooting
DIP Switches	Configuration for altitude, blower delay, etc.

Maintenance Guidelines

Routine maintenance schedule.

Monthly: Check air filter; replace when dirty
Annual: Professional inspection and cleaning
Clean burners and heat exchanger
Check vent system for obstructions
Verify gas pressure and electrical connections
Lubricate inducer motor if required
Test safety controls and limit switches

WARNING! Only qualified technicians should perform internal maintenance.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No heat	Power, thermostat, gas supply	Check circuit breaker, thermostat setting, gas valve
Furnace won't start	Door switch, pressure switch	Ensure doors closed; check pressure switch tubing
Short cycling	Dirty filter, airflow restriction	Replace filter; check for blocked vents/registers
Lockout mode	Ignition failure, flame sensor	Reset power; clean flame sensor; check gas pressure
Unusual noises	Blower, inducer motor	Inspect for obstructions; check motor bearings

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

Service: Contact authorized Daikin dealer for technical support.