Lochinvar Hot Water Generator operation manual 6Maintenance continued

Hot Water Generator Installation and Operation Manual

6Maintenance (continued)

2.Assure that the energy source, condensate / water return line, cold water inlet, and hot water outlet have been shut off; that the tank has been completely drained; that the pressure has been bled from both the water and energy source systems; and that all components and surfaces have cooled.

3.Carefully break the joint between the unit and the line or valve to be replaced.

4.Remove the section of line or valve to be replaced.

5.Replace the damaged section of line or valve.

6.Reconnect the line or valve to the unit. Follow recommendations contained in the manufacturer’s documentation, local codes, or accepted contractor practices as to the use and / or type of joint compound or sealer at the connections.

7.Follow the startup procedures (page 10) to put the unit back on-line. Carefully check all connections for any sign of leakage.

Temperature/pressure gauge (tank) (optional) - replacement

If the temperature/pressure gauge for the water tank is not functioning correctly and must be replaced, follow the procedure outlined below.

The combination of electricity and water ￿ WARNING can pose a very dangerous situation. Turn

off / disconnect all electric power before attempting any maintenance procedure.

1. Follow Steps 1 through 5 of the shutdown procedure (page 10) to take the unit off-line before attempting to replace the water temperature/pressure gauge.

2. Carefully unscrew the water temperature/pressure gauge from the port in the tank.

3. Install the new gauge by screwing it into the port in the tank. Follow recommendations contained in the manufacturer’s documentation, local codes, or accepted contractor practices as to the use of joint compound or sealer at the connections.

4. Follow the startup procedure (page 10) to put the unit back on-line. Carefully check all connections for any sign of leakage.

Single solenoid safety system (optional)- inspection and replacement

The single solenoid safety system closes the steam (or boiler water) control valve in an over-temperature condition. The system should be checked semi-annually. (See manufacturer’s documentation for the solenoid safety system provided with the unit for specific inspection intervals and test routine.) If the system is found to be malfunctioning and must be replaced, follow the procedure outlined below.

The combination of electricity and water ￿ WARNING can pose a very dangerous situation. Turn

off / disconnect all electric power before attempting any maintenance procedure.

1. Follow Steps 1 through 5 of the shutdown procedure (page 10) to take the unit off-line before attempting to replace the single solenoid safety system.

2. If the system is electrically activated, turn off the power and disconnect the electric leads from the safety system.

3. Remove the solenoid valve from the piping or high limit thermostat from mounting.

4. Mount the new safety system.

5Reference the manufacturer’s documentation for the safety system that was supplied with your unit for additional installation / setup instructions.

6.Follow the startup procedures (page 10) to put the unit back on-line. Carefully check all connections for any sign of leakage.

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