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Figure 4.3 The thermovalve for controlling the air flow rate for the combustion
process is installed and its rod is connected to the air flap (by the applied chain);
EXPLANATION: the adjustment of the chains’ length and the opening of the
inflow air flap should be performed at operating hot water boiler, reached
operating thermal parameters. In order to initially start the boiler, the air flap
should be opened and thus to allow air flow in the boiler;
o
Install a self opening valve, which opens at high levels of temperature
(not module of the boiler delivery). The valve opens and directs tap
water to the emergency cooling coil of the boiler, thus decreasing the
circulating water temperature). See the user manual of valve for more
details;
EXPLANATION: the sensing section of the thermovalve should be
screwed in an orifice, positioned in the upper back side of the heat
exchanger. The water flow control module of this thermovalve should
be mounted on one of the emergency coil ends (no matter which end
will be chosen as inflow and the other – as outflow). The water flow
control module of this thermovalve should be connected to the tap
water, which will be under the pressure of the tap water of the
domestic fresh water supply system (or any other source of water at
appropriate pressure level). The outflow of the emergency cooling coil
should be connected to the drainage systems, in case of emergency hot
water should be drained safely;
