TURBOPOWER 99 WATER HEATER
10GENERAL INFORMATION
10.1Temperature and Pressure Relief Valve(s)
Pipe the relief valve discharge to a suitable open drain. The drain pipe may not be smaller than the relief valve opening and must be secured to prevent it from lifting out of the drain under discharge pressure. Do not install valves or restrictions in the discharge line.
10.2Lower LED Readout
An adjustable digital operating control is located in the front control panel. The control is factory
10.3High Water Temperature Limit Control
Appliances are equipped with adjustable limit and fixed high limit controls to control the maximum discharge water temperature. These controls are located inside the control cabinet. The high limit control is optionally available as the manual reset type and may be reset by pressing the limit reset button accessible through the control panel cover. The adjustable limit is of the auto reset type and can be dial adjusted to operate just above the set point of the main operating temperature control. Pressing the reset on the high limit control will not cause the control to reset until the water temperature has dropped below the set point of the manual reset high limit control.
WARNING: Turn off all electrical service to the appliance when accessing the limit or high limit controls located inside the control cabinet. This cabinet contains High Voltage wiring and terminals. If the electrical service is not turned off and these terminals are touched, a dangerous shock causing personal injury or loss of life could occur. Close and fasten the control cabinet cover before restoring electrical service to the appliance.
10.4Cathodic Protection
PVI water heaters do not utilize cathodic protection. However, in hot water systems utilizing cathodic protection, hydrogen gas can be produced when the hot water system has not been used for a long period of time (generally two weeks or more). Hydrogen gas is extremely flammable. To prevent the possibility of injury under these conditions, one of the hot water system faucets should be opened for several minutes before using any electrical device connected to the hot water system. If hydrogen is present, there will be an unusual sound such as air escaping through the pipe as the hot water begins to flow. Do not smoke, have open flames or turn electrical switches on or off near the faucet at the time it is open.
10.5Thermal Expansion
A relief valve that discharges periodically may be due to thermal expansion in a closed system, such as water heaters or hot water supply boilers installed in a system closed by components, such as a backflow preventer or check valve in the cold water supply or a closed boiler heating loop. These systems must be provided with means to control expansion. Contact a water heater or plumbing professional to resolve this situation. Do not plug the relief valve.
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