Always Observe The Following - Austria Email GTS 120 Bedienungsanleitung

The water connection may be made only through an inspected membrane safety valve or membrane safety valve combi-
nation fitting (not a piston valve)! A safety valve combination consists of a shut-off, test, non-return, waste and safety valve
with expansion water drain and is installed between the cold water feed line and cold water inlet of the tank in the order
shown:
Tank connection to DIN 1988 and ÖNORM B2531:

Always observe the following:

To ensure proper function of the fitting, the latter must be installed only in a frost-protected space. The safety valve runout
must be open and visible and the waste line of the drip catcher (expansion water funnel) must be routed to the waste water
duct so that neither frost nor obstructions caused by dirt and such can cause a problem. Ensure that the drip cup or item to
be drained is free of deposits and soiling.
No shut-off valve or other restriction may be installed between the safety valve and cold water inlet of the water heater.
The safety valve must be set to a response pressure which is less than the rated pressure of the tank.
Before finally connecting the tank, flush the cold water line.
After making the water connection and air-bubble free filling of the tank, check the fitting for proper function.
When lifting or turning (venting) the safety valve test button, the water must flow out freely and without backing up through
the expansion water outlet funnel.
The discharge openings of the safety valves (domestic water and heating circuits) must open out into an appropriate drainage
object in order to avoid any damage caused by the escape of operating fluid.
To check the return valve, the shut-off valve must be closed and no water may flow out from the opened test valve. The safety
valve must be checked according to DIN 1988 or ÖNORM B2531.
The water heater is operated using the hot water valve on the service water fitting. This means the tank is under continuous
line pressure. To protect the internal boiler against overpressure when heating up, the expansion water created is dispersed
through the safety valve every time it is heated. The return valve prevents hot water from flowing back into the cold water line
when there is a pressure drop and thus protects the boiler from heating when no water is present.
The shut-off valve can be used to isolate the tank on the water side and thereby eliminate the pressure from the cold water
supply, also allowing use of the waste valve when necessary.
In order to allow for a trouble-free repair, a removal or exchange of the device, it is necessary to establish the connection
of the tank by means of a detachable connection (Dutch). Tank leaks as a result of an improper connection and resulting
damage and consequential damage are excluded from the warranty and product liability.
Id.Nr. 247959-3
Tank
19