Armstrong Ultra V Tech 80 Furnace Manual

The Armstrong Ultra V Tech 80 is a high-efficiency gas furnace with 80% AFUE rating, featuring variable-speed blower technology, electronic ignition, multi-speed operation, built-in diagnostics, and compatibility with standard thermostat systems. Designed for residential heating applications with natural gas or propane capability. Below are key sections for safety, features, installation, operation, maintenance, and troubleshooting.

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

Features at a Glance

Key components: Variable-speed blower motor, electronic hot surface igniter, multi-position installation capability, built-in diagnostic LED, pressure switch, flame sensor, and rollout switches.

Feature	Description
Variable-speed blower	Provides consistent airflow and quiet operation
Electronic ignition	Hot surface igniter for reliable startup
Multi-position installation	Upflow, downflow, or horizontal configurations
Built-in diagnostics	LED status light for error code display
Pressure switch	Ensures proper venting operation
Flame sensor	Detects burner flame for safety shutdown
Rollout switches	Prevents overheating and unsafe operation
Gas valve	Precision control of gas flow
Heat exchanger	Durable aluminized steel construction
Blower compartment	Easy access for maintenance and filter changes

Installation Requirements

Professional installation recommended. Verify local codes and obtain permits.

Location selection: Choose well-ventilated area with adequate clearance (minimum 1 inch sides, 6 inches front).
Venting: Install proper Category I venting system according to manufacturer specifications.
Gas connection: Use black iron pipe with proper thread sealant; pressure test for leaks.
Electrical: Connect to 120V AC power with proper grounding; install disconnect switch.
Ductwork: Ensure proper sizing and sealing for optimal airflow.

WARNING! Gas appliances can be hazardous; installation must comply with all local codes and regulations. Carbon monoxide poisoning risk if improperly installed.

First-Time Setup

Complete installation verification before initial startup.

Gas pressure adjustment: Set manifold pressure to 3.5" WC for natural gas or 10" WC for propane.
Blower speed settings: Adjust dip switches for proper CFM based on heating requirements.
Thermostat configuration: Connect compatible thermostat; set to heat mode.
Initial startup: Follow lighting instructions; observe complete heating cycle.
System check: Verify proper ignition, flame pattern, and temperature rise.

CAUTION! Only qualified technicians should perform initial setup and adjustments.

Technical Specifications

AFUE Rating: 80%
Input Capacity: 40,000 to 120,000 BTU/hr (model dependent)
Gas Type: Natural gas or propane (conversion kit required)
Electrical: 120V AC, 60Hz, 5-8 amps
Blower Motor: Variable-speed ECM
Venting: Category I, 4-5 inch diameter
Static Pressure: 0.1 to 0.8 inches WC
Temperature Rise: 35-65°F
Dimensions: Varies by model (typically 21"W x 48"H x 26"D)
Weight: 90-150 lbs depending on model

Controls and Operation

Integrated control board manages all furnace functions with LED status indicator.

Control Board: Monitors safety devices, controls ignition sequence, manages blower operation.

Operating Modes: Heating cycle, blower-only mode, standby. LED Codes: Steady light (normal operation), flashing codes indicate specific faults (1 flash pressure switch, 2 flashes ignition failure, etc.). Blower Control: Variable speed operation with multiple tap settings for different airflow requirements. Limit Switches: Automatic shutdown if temperature exceeds safe limits.

Thermostat Connection

Compatible with standard 24V thermostat systems. Connection terminals: R (power), W (heat), G (fan), C (common).

Turn off power to furnace before connecting thermostat wires.
Match thermostat wires to control board terminals (R, W, G, C).
Use 18-gauge thermostat wire for runs under 50 feet.
Program thermostat for proper cycle times and temperature differentials.

Tip: For optimal efficiency, use programmable thermostat with appropriate temperature setbacks.

Maintenance Procedures

Regular maintenance ensures optimal performance and safety.

Monthly: Check and replace air filter if dirty.
Annual: Professional inspection and cleaning recommended.
Burner inspection: Clean burners and verify proper flame pattern.
Heat exchanger: Visual inspection for cracks or damage.
Blower assembly: Clean blower wheel and housing.
Vent system: Inspect for obstructions or damage.
Drain system: Clear condensate drain lines and trap.
Electrical: Check all connections and component operation.

WARNING! Disconnect power and gas supply before performing any maintenance.

Safety Features

Multiple safety systems protect against hazardous conditions. Pressure Switch: Prevents operation if venting is blocked. Flame Sensor: Shuts off gas if flame not detected. Rollout Switches: Protect against flame rollout. High Limit Switch: Prevents overheating. Ignition Control: Monitors complete ignition sequence. Gas Valve: Automatic shutoff in fault conditions.

Care & Cleaning

Regular cleaning maintains efficiency and extends furnace life.

Air Filter: Replace every 1-3 months during heating season. Burners: Clean annually with soft brush. Blower: Vacuum annually. Heat Exchanger: Professional inspection recommended. Vent System: Clear debris from termination and check for obstructions.

CAUTION! Never operate furnace without filter. Keep combustible materials away from furnace.

Regulatory Information

ANSI Z21.47/CSA 2.3: Certified for gas-fired central furnaces. UL: Listed for electrical safety. Manufactured to comply with U.S. Department of Energy efficiency standards. For technical support, contact Armstrong Air Conditioning Inc. at 1-800-448-5872 or visit www.armstrongair.com.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Furnace won't start	Power, thermostat, door switch	Check circuit breaker, thermostat setting, ensure door properly closed.
No heat	Gas supply, ignition	Verify gas valve on, check for ignition attempts, observe LED codes.
Blower runs continuously	Thermostat setting, limit switch	Check thermostat fan setting, test limit switch operation.
Furnace cycles on/off frequently	Filter, airflow, overheating	Replace filter, check for blocked vents, verify proper temperature rise.
Unusual noises	Blower, ductwork, burners	Inspect blower wheel, check duct connections, clean burners.
LED flashing error code	Various system faults	Count flashes and refer to error code chart in service manual.

Reset: Turn power off for 30 seconds, then restore to reset control board.

Service: 1-800-448-5872; www.armstrongair.com