Gasmaster R Series, Руководство по установке, Страница: 11 / 81

Part 1
– Introduction
Functionality of main parts
Control
The boiler can be controlled by an on/off thermostat or an OpenTherm® thermostat. The heat
delivery is continuously variable between approx. 14% and 100% of the power of the appliance to obtain
a constant temperature in the house.
Variable speed fan
To save energy, a high efficiency fan (A, figure 1.2) has been applied. The fan has a variable speed
and energy absorption. If less heath is needed, the fan rotates slower and uses less energy.
Pump
The has an integrated pump (F, Figure 1.3) that is controlled by the burner control and has a
variable pump speed. The speed of the pump may vary between 60 and 100%. The burner control
determines the speed of the pump by means of the temperature difference between the supply sensor
(H, figure 1.2) and the return sensor (G, figure 1.3).
Domestic hot water production (Cxxx types)
This appliance has a built-in plate heat exchanger (C, figure 1.3) with limited tap water storage. All
connections are internal. While a flow limiter takes care of the maximum hot water quantity, the tap water is
heated up to about 61 °C (142 °F). The
boiler starts preparing tap water at a flow of 2.5 l / min
(0.66 gal. / min.) and stops when the flow drops below 1.8 l / min (0.48 gal. / min).
Automatic flue gas temperature limiter
The appliance has been equipped with a built-in protection against too high flue gas temperatures. This
protection closes the gas supply as soon as the flue gas temperature becomes too high, after which the
unit is locked, displaying a fault code.
(Separate) supply and discharge pipes
The optimum connection for air supply and flue gas discharge pipe is obtained by using the flue gas
systems as described in this manual. The boiler does not have certification for other flue gas systems.
CH and DHW circuit
Warning
If no diffusion-tight plastic pipes for supply and return are applied for radiators or floor heating, place a
partition between the CH water of the boiler and the water in the system. For example, use a plate heat
exchanger. This prevents contamination of the heat exchanger by, among others, magnetite. When such
a partition is not placed, the guarantee for all parts in the supply and return of the unit will be null and void.
Drain valve
The appliance has a drain valve (J figure 1.3), allowing simple draining of the water.
Pressure relief valve
The supplied PRV appliance needs to be placed directly on the return pipe of the boiler.
Pump vent
The pump vent (G, figure 1.2) has been connected to the vent drain (E, figure 1.4), making visible
any leakage from the vent on the outside of the appliance.
Adjustable by-pass
The appliance also has an internal, permanently adjustable by-pass (D, figure 1.3). The single purpose of
this internal by-pass is to achieve circulation. In case the layout of the installation is such that a situation
could occur in which there is no CH flow, it is mandatory to install an external by-pass at least 6 meters (20
ft) from the boiler.
Option for solar boiler combination
If the boiler is used in combination with a solar tank, the boiler must remain switched on in summer in order
to prevent Legionella bacteria infection. Make sure that the maximum DHW temperature does not exceed 65
°C (149 °F). This may cause a risk of burning for the user. Install an automatic mixer in the hot water pipe
between the boiler and the tap points to avoid this problem.
Frost protection
The appliance has a built-in frost protection that starts the boiler when the CH water temperature drops
below 6 °C (43 °F).
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R Series
R Series
R Series