Raypak 241355 warranty Installation, Maintenance, Flushing the Storage Tank

Raypak Glass-Lined Storage Tank

Installation & Maintenance Procedures

NOTE: The information contained in this manual is intended for use by qualified professional installers, service technicians or gas suppliers. Consult your local expert for proper installation or service proce- dures.

Installation

The water storage tank MUST be installed using di- electric connections. Failure to do so will void the man- ufacturer’s warranty. Installation of the tank without dielectric connections can cause the rapid failure of the storage tank due to electrolysis. For this reason, it is imperative that dielectric connections be utilized.

The tank should be installed in such a manner that should the tank or any of its connections leak, the re- sulting flow of water will not cause damage.

Follow the Dielectric Protection instructions in these procedures to verify that the dielectric connections are installed properly. If electrical continuity exists between the tank and its piping, the connections MUST be

fixed.

Maintenance

A new tank installation should have a regular inspec- tion program set up initially. The first inspection should be within the first three months of operation. Once the tendency to accumulate sediment has been estab- lished, the inspection program can be modified to suit the water conditions. Typical inspection programs flush the tank at six-month intervals and clean the tank in yearly intervals.

Deliming solvents or acid type flush agents are not rec- ommended for use in lined storage tanks. These chemical cleaners are usually designed for use in non- potable systems such as heating boilers. These chemi- cals may be aggressive and cause damage to the tank lining and deteriorate the magnesium anodes supplied in Raypak glass-lined storage tanks.

WARNING: Hot water will be released under pres- sure. Avoid contact with the hot discharge water to prevent the risk of severe scald injury.

Flushing the Storage Tank

Since the mineral accumulation is occurring in an un- fired tank it will be in a soft sediment form. Much of this soft sediment can be removed by a regular flushing of the lower portion of the tank.

To flush the tank, follow these steps:

1.Turn off the electricity and gas supply to the water heater piped to the storage tank.

2.Turn off electrical power to the circulating pump.

3.Close the valve on the hot water outlet on the top of the storage tank.

4.Ensure that the drain located on the bottom of the tank is routed to a floor drain with adequate capacity to allow the tank to be flushed.

5.Open the drain valve and allow the incoming cold water to flush the soft sediment out the bottom of the storage tank. Use extreme caution, as the water exiting the tank drain may be very hot. Avoid con- tact with the hot discharge water to prevent the risk of severe scald injury.

6.Observe the color of the water initially discharged from the tank drain. This water will generally be milky or slightly discolored by the sediment dis- charge. Allow the drain to run until the water runs clear.

7.Close the drain valve on the tank.

8.Open the hot water outlet valve on the top of the tank.

9.Open an adjacent hot water tap to purge any air that may have entered the storage tank during the draining process. Close the hot water tap if no air discharge is observed.

10.Turn on electric power to the water heater and cir- culating pump.

11.Turn on the gas supply to water heater.

12.Observe heater and piping to ensure all compo- nents are functioning properly.

Cleaning the Storage Tank

The mineral accumulation in an un-fired tank will be in a soft sediment form that can be removed by a regular cleaning of the lower portion of the tank. Many tanks will have a hand hole or a larger manway to allow ac- cess to the interior of the tank for complete removal of accumulated sediment. The opening will be in the bot-

CATALOG NO. 4000.50B Effective: 12-01-08 Replaces: 06-02-08 P/N 241355 Rev. 1