Nautilus (IW60A) On-Demand Water Heater Technical and Operational Guide

Safety Precautions

• Freeze Warning: Protect against freezing by draining or using RV-approved antifreeze.
• Combustible Materials: Do not store or use near the water heater.
• Installation: Must comply with the provided manual instructions.
• Gas Leak Procedure: Evacuate, shut off gas, avoid electrical operations, and contact a professional.
• Maintenance and Repair: Should only be performed by qualified service personnel.

Technical Specifications

• Injectors: 1.05mm x2, 1.10mm x3
• Gas Consumption: 64 MJ/h
• Test Point Pressure: 1.89 kPa
• Type of Gas: Universal LPG
• Dimensions: Width: 316.6mm, Height: 317.8mm, Depth: 464.9mm
• Water Connections: Hot outlet 34mm from top, cold inlet 128.7mm from bottom, flue outlet 101mm from RH top edge, gas inlet 61mm from left edge.
• Inlet Size: 3/8"

Installation Guidelines

• Venting: Use a Suburban vent cap. Ensure a 6” clearance from any obstructions.
• Electrical: 12V DC connection required. Ensure proper grounding.
• Gas Connection: 3/8" gas supply line. Check for leaks with soap and water solution.
• Water System: Minimum recommended pipe size is ½”. Ensure system is filled and purged of air before use.
• Drain Lines: Must run outside the RV, maintain a minimum drop of ¼” per foot.

Operating Instructions

• Control Center: Adjust water temperature between 35°C/95°F to 50°C/122°F.
• Start-Up: Ensure gas and power supply are on. Open a hot water faucet to initiate heating.
• Shut Down: Turn off power and gas supply. Drain if exposed to freezing temperatures.

Troubleshooting

• No Water Flow: Check water supply and restrictions.
• Temperature Fluctuations: Clean aerators and ensure minimum flow of 0.5gpm.
• Cycling On and Off: Increase water flow or check for water source pressure fluctuations.
• Low Temperature: Increase water flow to ensure minimum of 0.5gpm.
• No Ignition: Check Control Center power, gas supply, and manual reset on ECO switch.

Maintenance

• Soot Inspection: Check for obstructions and ensure proper ventilation.
• Pressure Relief Valve: Do not plug or remove. Inspect periodically.
• Winterizing: Drain system to prevent freeze damage. Use non-toxic antifreeze if recommended.
• Descaling: Annually flush the heat exchanger with an approved solution.

Installation and Service Notes

• Authorized Personnel: Installation and service must be performed by authorized installers or service agencies.
• Pressure Reducing Valve: Must be installed in the incoming water line to maintain a rating of 350 kPa (50 psi).
• Vent Clearance: Ensure the vent is not obstructed and has proper clearance from any overhangs or slide-outs.

Additional Information

• Freeze Protection: Built-in feature cycles the burner to prevent freezing under certain conditions. Ensure gas and power are supplied for operation.
• Descale Annually: To maintain efficiency and performance.

This guide is designed to provide customer service and technical staff with comprehensive information on the Nautilus (IW60A) On-Demand Water Heater, ensuring efficient operation, troubleshooting, and maintenance.