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- If the combi boiler is correctly connected to gas and
electrical sources;
- If the combi boiler is supplied from gas and electricity
sources (if the main switch is open) in a fixed way;
- If the combi boiler is not in failure situation due to lack
of ignition;
- In order to maintain circulation of installation water,
installation valves and radiator valves under the combi
boiler must be open.
Under these conditions, the combi boiler is protected
against frost up to -5°C environment temperature.
Lowest Temperature -5°C.
In case the combi boiler
is installed in an environment with a temperature lower
than -5°C, and gas supply is interrupted or passed into
failure due to failing to make ignition, Frost Prevention
System will not be activated and frost/failure might occur
in the device. Following instructions should be followed
for preventing the risk of frost:
- Protecting the heating circuit against frost by using anti-
freeze chemicals (special for heting circuits) from a known
supplier, considering the minimum temperature needed and
percentage of the antifreeze declared by the supplier
Materials used for manufacturing the combi boiler are
resistant against glycol and propylene based anti-frost
liquids. Follow warnings of supplier company regarding their
lives and possible disposals.
Damages arising from failing to follow above mentioned
issues and interruption of electricity supply shall be
excluded from validity of the warranty.
In case the combi boiler is installed at places with
temperature lower than 0°C (both for tap water ad
radiator purposes) both heating and hot water circuits
must be insulated.
2.2.11. Electrical Connections
Electrical safety of the combi boiler is assured only if
completely connected to an effective earthing installation
that follows safety instructions in force. No earthing shall
be made from the neutral line on the socket for places not
having earthing! It is dangerous and unacceptable to use
gas and water connection pipes for earthing.
WARMHAUS A.Ş. cannot be held as responsible for any
damages and losses on individuals or commodities
arising from failing to provide earth connection of the
combi boiler and electrical connections not being made
by a competent electrician in accordance with directives
and standards in force.
Also, ensure that the electricity installation complies with
the maximum power to be supplied as indicated in technical
specifications label on the combi boiler. Combi boiler is
given with “X” type socketless special power source cables.
“Warmhaus combi boiler has an IPX5D protection level.
Power supply cable should be connected by relying on earth
connection and L-N poles in a 230 V +%10; -%15 50Hz grid,
high voltage category 3rd class multiple pole disconnector
should be envisaged on the same grid. Always contact
Authorized Warmhaus Service for replacement of the cable.
Power supply cable should follow the defined
route. In case fuses on the adjustment card are
replaced, please use 2A or 3,15A speed type fuses.
In order to feed the device from the general
electricity grid, adapter, multiple sockets and extension
cables are not allowed to be used.
2.2.12. Optional Controls: Room Thermostat,
Outside Sensor and Others
Room thermostat, Outside Temperature Sensor, etc.
control devices must be connected to Warmhaus combi
boiler devices by the authorized service personnel; in case
connections are performed by unauthorized persons,
combi boiler warranty shall be void.
Room thermostat, Outside Temperature
Sensor, etc. control devices are provided as
optional accessories for Warmhaus combi
boilers and they must be Warmhaus approved.
Please follow Installation & User Manual for installation of
Outside Temperature Sensor.
This sensor can be directly connected to electrical
installation of the combi boiler, and it automatically
reduces the maximum central heating flow temperature
in the installation when exterior weather temperature
rises for enabling functioning according to outside
temperature changes. Outside Temperature Sensor is
activated when connected as independent from the used
room thermostat typology and functions as common with
room thermostats. The relation between central heating
flow temperature and exterior weather temperature is
defined according to curves in the diagram with regards
to the central heating set temperature.
Electrical connection of the Outside weather temperature
Sensor shall be made to the terminals matching the 2
white cables (Figure 10).
