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MAKING DRAIN CONNECTIONS (SEE FIGURE 5) faucet OPEN to a minimum of 0.5 GPM for the unit to operate. A. Drain connections are made at the front of the water heater. Refer If the burner does not light, the system will automatically attempt to Figure 5. Connect 5/8" ID hose to system drain fitting provided two more tries for ignition before lock-out. When light remains on front of unit. Connect I/V ID hose to condensation drain fitting illuminated,the system is in lockout. provided on front of unit. 8. If lockout occurs, unit must be re-cycled by turning the faucet OFF B. Drain lines must run to the outside of the RV. Drain lines should be or turning the switch OFF and then back ON. The first start-up as short as possible and must maintain a minimum drop of Y:' per of the heater may require several ignition cycles before all air is foot. (6.4mm per 305mm). See Figure 5. purged from the gas lines. This On Demand Water Heater is factory set at 49°C/120°F. To change MAKING WATER CONNECTIONS (SEE FIGURE 5) the water temperature settings, you will need to access the front of the A. Water connections are made at the front of the water heater. Refer water heater. to Figure 5. Connect the hot and cold water lines to the 1/2" NPT 1. Remove the SERVICE PANEL as shown in Figure 9. female pipe fittings provided on front of unit. These fittings are 2. Locate the set offour(4)dip switches located onthe module board marked"HOT"and"COLD". and refer to Figure 12 for information on setting dip switches to IMPORTANT:Use a pipe thread compound suitable for potable water or desired temperature setting. pipe thread tape on all connections to ensure they will not leak. B. For ease of removal, it is suggested that a pipe union be installed OPERATING INSTRUCTIONS WITH OPTIONAL in each water line. ON DEMAND CONTROL CENTER (SEE FIGURE 13) C. Fill system with water. Open both hot and cold water faucets to 1. STOP! Read the safety information provided in the Operation expel air from system. When system is filled and water flows from Manual that came with your unit. faucets, close both faucets and check all connections for leaks. 2. Turn off all electric power to the appliance. 3. Tum"OFF"gas supply. MAKING GAS CONNECTIONS 4. Wait five minutes for gas to clear the area. If you smell gas then A. Connect a 3/8"gas supply line to the 3/8"flare fitting at gas valve. STOP!Follow instructions in item B ofthe SAFETY INFORMATION When making the gas connection, hold the gas fitting on the valve provided in the Operation Manual that came with your unit. If you with a wrench when tightening the flare nut. Failure to hold fitting do not smell gas, go to next step. securely could result in a gas leak due to fitting being damaged. 5. Turn"ON"gas supply. B. Tum on gas and check all fittings and connections for leaks using a 6. Tum on electrical power to the appliance. soap and water solution.Correct even the slightest leak immediately. 7. PRESS THE "ON" button. The On Demand Control Center is NOTE: When replacing your water heater with an NAUTILUS (IW60) illustrated in Figure 13. Your On Demand Control Center is located On Demand water heater, review your gas regulator to ensure it can somewhere inside the RV. The water heater operates based off of maintain a proper gas flow during the operation of the On Demand "flow." There must be a hot water faucet OPEN to a minimum of 0.5 water heater and other gas burning appliances. GPM for the unit to operate. If the burner does not light, the system NOTE: Regulator switch over pressure may be lower than main will automatically attempt two more tries for ignition before lock-out. operating pressure. 8. If lockout occurs, an ERROR CODE will be displayed on the On Maximum Capacity of Pipe in Cubic Feet - "I Pressures Demand Control Center and the unit must be re-cycled by turning the PSIG or Less and a Pressure Drop• faucet OFF or by pressing the OFF button on the On Demand Control INTENDED USE Center and then back ON. The first start-up of the heater may require T""'ns In.a ba." .,.,w.,a n°"'s'an"p-ral egu1torn°'"""""`° several ignition cycles before all air is purged from the gas lines. Nominal: K 8 L: 1/4 3/e 1/2 5/8 This On Demand Water Heater is factory set at 49'C/1 20'F. To change Nominal: ACR: 3/8 1/2 518 3/4 the water temperature settings: Outside Diameter. 0.375 0.500 0.625 0.750 1. Press the UP or DOWN arrows on the On Demand Control Inside Diameter- 0.305 0.402 0.527 0.652 Center to increase or decrease the SET water temperature in single degree increments. The water temperature set range is Length(feet) Capacity in Thousands of BTU per Hour 35'C/95°F to 54°C/130°F. See Figure 13. 10 45 93 188 329 20 31 64 129 226 OPERATING FAUCETS AND SHOWER WITH THE 30 25 51 104 182 NAUTILUS (IW60) ON DEMAND WATER HEATER 40 21 44 89 155 A. All faucets must be operated the same as you would in your home. B. Unit thermostat is set at 120"F at the factory. Cold water must be so 1s 3s 7e 138 added to achieve the desired hot water temperature. *Table capacities are based on TYPE K copper tubing I.D. 1. If this is the first use of the unit for the season, turn water supply on and open each faucet and allow all air to be purged OPERATING INSTRUCTIONS WITH SWITCH AND from the water lines. LIGHT ASSEMBLY (SEE FIGURE 12) 2. Turn ON power supply. 1. STOP! Read the safety information provided in the Operation 3. Turn ON propane supply. Hot water faucet may have to be Manual that came with your unit. cycled several times to purge gas supply. 2. Turn off all electric power to the appliance. C. The water heater only heats when there is a call for water(open hot 3. Turn"OFF"gas supply. water faucet). 4. Wait five minutes for gas to clear the area. If you smell gas then D. A minimum of 0.5 gallons per minute is required forwater heater STOP! Follow instructions in item B of the OPERATING SAFETY to operate. INFORMATION provided in the Operation Manual that came with E. Faucet should be turned on and adjusted to desired temperature your unit. If you do not smell gas,go to next step. and flow before entering shower. 5. Turn"ON"gas supply. F. Shower head button should NOT be used. Using the shower head 6. Turn on electrical power to the appliance. button will create a drop in temperature by reducing or stopping the 7. Turn switch that operates the water heater to "ON" position. The flow of water through the water heater causing the water heater to switch is illustrated in Figure 12. Your Switch may be different in shut down. appearance and is located somewhere inside the RV The water G. Flow restrictors in faucets and shower heads should be removed heater operates based off of"flow." There must be a hot water for best performance. 5