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THERM 90 KD.A
2.2.2 Disconnection of the boiler from operation
It is possible to disconnect the boiler for a shorter period by the operating regime switch or by the switch on the room
thermostat.
For longer disconnection of the boiler outside the heating season (e.g. during summer and holidays) it is recommended
to close the gas valve. However, leave the boiler connected to the electricity network. Only in this case will the protective
functions of the boiler be active.
Any full disconnection of the boiler (closing of gas supply, disconnection from electricity network) must be done with respect
to the ambient temperature of the environment in the respective season! There is a risk of the heating system or DHW circuit
freezing due to damage to the boiler or other elements of the heating system.
2.3 Regulation
The boiler is fitted with internal regulating elements at a high level for such basic equipment. The standard is integrated
equithermal regulation. The heating in the heating system can be controlled in several ways: regulation of the room
temperature in a selected reference room; equithermal regulation of heating water, regulation according to the boiler
temperature.
2.3.1 Operation of the boiler without the room thermostat or regulator
In this regime the boiler maintains the selected temperature of the heating water. The room thermostat or the regulator is
not connected; the terminals for connection must be mutually interconnected (set in production).
In this regime, set the temperature of the heating water directly on the control panel of the boiler with the middle button.
The operation of the independent boiler
(without selection of equithermal regu-
lation) is recommended to be controlled
using at least a simple room thermostat.
The room temperature is time stable
and keeps the boiler in the operating
regimes. It is recommended to use the
built-in equitherm regulation either in-
dependently or completed by the spa-
tial regulation, as mentioned below.
The setting of output range of the boiler and other parameters must be in accordance with the technical data.
Any overloading and incorrect use of the boiler may cause the devaluation of its components The warranty
cannot be applied for such damaged components!
The boiler must not be operated with the emergency or flue thermostat or manostat excluded from operation
or replaced by other equipment than that stated by the producer! Otherwise, an accident or other hazardous
statuses may occur!
A service technician authorised by the producer must familiarize the user during activation with the operation of
the boiler, the individual parts, the safety elements and the manner of control, complete the Warranty Certificate
and give this user manual to the user.
The user is obliged to ensure of the correct use of the boiler in accordance with this manual which is a conditions
of acceptance of the warranty. In addition, it is strictly forbidden to intervene in any manner into the secured
parts in the boiler!
!
2.3.2 Operation of the boiler with spatial thermostat
In this manner of regulation, the boiler maintains the selected temperature of heating water. Indoor thermostat is connected
with the jumper of the terminal X9 on the boiler control automatics. The operation of the boiler is consequently controlled
according to the inside temperature in a room where the room thermostat is located (the reference room). It is not
recommended to mount thermostatic valves on radiators in the reference room!
For control according to room temperature, Thermona delivers and recommends the whole series of room
thermostats: e.g. PT 22, Honeywell CMR 707, CMT 727 (wireless version) etc.
