Thermann Installer's Manual
Gas Continuous Flow Condensing Water Heaters
10
COLD WATER SUPPLY TO WATER HEATER
Refer to the Dimensions diagrams on page 8 for the position of connections.
Copper tube of a minimum size of 3/4" (DN20) should be connected to the appliance.
The water inlet connection is R3/4" (20mm) male BSP and require a union to allow for
removal of the water heater.
Pipe sizing from the cold water supply should be sized according to local BY LAWS
for water supply.
This appliance is intended to be connected permanently to the water supply and not
connected by a temporary method such as a garden hose.
ISOLATING VALVE
A full flow isolation valve such as a gate valve or ball valve together with a disconnection
union must be used on the cold water inlet to the water heater.
THIS REQUIREMENT IS AN AUSTRALIA WIDE REQUIREMENT UNDER
THE NATIONAL PLUMBING CODE.
If the above instruction is not carried out, all warranties on the unit will be voided.
Stop taps or combination stop taps and non-return valves are not to be used.
NOTE: No pressure reduction valve is required unless the inlet water pressure exceeds
1200kPa at any time.
COLD WATER CONNECTION
Refer to Dimensions diagrams on page 8 for the position of connection.
The outlet connection is male thread R3/4" (20mm) and requires union connection to
allow for removal of the unit.
Install the hot water supply line from the unit with a minimum size
of 3/4" (DN20) copper tube.
For units set at 50°C, a minimum of 1.8 metres of 20mm pipe must be run before the first outlet.
Keep the pipe lengths to a minimum and make sure that the pipework is well insulated,
as correct performance of the appliance is dependent on properly insulated pipework.
DO NOT FIT ANY VALVES OR RESTRICTORS TO THE OUTLET OF THE WATER HEATER.
DO NOT FIT ANY OBSTRUCTION TO THE PRESSURE RELIEF LOCATED ON THE HOT
WATER OUTLET CONNECTION.
After purging the air from the system using the hot water supply taps, remove the water
inlet strainer located on the cold water supply inlet connection.
Remove any debris from the filter and replace. When replacing the filter do not
over-tighten the “O”ring seal.
HOT WATER CONNECTION
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