10
Thermann Installer's Manual
Heat Pump Water Heaters
Pressure reducing valve
The maximum pressure in the cold water supply line must be at least 20
% below the lowest response pres-
sure of all installed safety valves. Otherwise a pressure reducing valve is required. If this is the case, install a
pressure reducing valve in the cold water supply line. The pressure reducing valve must be set to 540
kPa if
a safety valve is installed; otherwise to 700
kPa.
Drain valve
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f
Install a suitable drain valve at the lowest point in the cold water supply line.
Thermal insulation
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Insulate the hot water line and valves against heat loss and to improve energy efficiency in accordance
with locally applicable regulations.
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Insulate the cold water supply line to prevent condensate forming.
Hot water outlet
WARNING Burns
The water in the hot water cylinder can be heated to temperatures in excess of 60
°
C. There is a risk
of scalding at outlet temperatures in excess of 43
°
C.
In Australia and New Zealand, observe regulations in accordance with AS/NZS3500.4:
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f
Install a temperature limiter in all systems intended for personal hygiene, e.g. tempering valve,
thermostatic mixing valve.
Condensate drain
Install a condensate drain hose to drain off the condensate that is created.
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f
Connect the condensate drain bend included in the standard delivery to the condensate drain
connection.
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f
Connect a condensate drain hose to the condensate drain bend.
!
Material losses
Ensure condensate cannot back up.
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Use a condensate drain hose with a diameter greater than the diameter of the condensate drain
bend.
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Ensure the condensate drain hose is not kinked.
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Route the condensate drain hose with a continuous fall.
The condensate drain must be open to atmosphere.
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f
Use a suitable condensate pump if there is insufficient fall. Take the building characteristics into account.
Condensate pan heater
!
Material losses
If the temperature at the installation site could continuously (1
-
2 days) fall below freezing, install a
condensate pan heater. The condensate pan heater is not part of the standard delivery.
When the compressor is running, install a load-dependent relay to switch on the condensate pan heater after
a delay. The condensate pan heater must have an external power supply.
Electrical connection
WARNING Electrocution
The appliance is supplied with a flexible power cable without plug. In the case of a permanent connec-
tion, the appliance must be able to be separated from the power supply by an isolator that disconnects
all poles with at least 3
mm contact separation. Contactors, circuit breakers or fuses can be used for
this. This type of isolator must be installed in the fixed electrical installation according to the regulations.
For Australia: Ensure that the appliance can be separated from the power supply by a suitable isolator.
Contactors, circuit breakers, fuses or general purpose electrical wiring plugs can be used for this.
The type of isolator must be installed according to the electrical installation regulations.
WARNING Electrocution
Carry out all electrical connection and installation work in accordance with national and regional reg-
ulations.
