XRGI
®
- INSTALLATION GUIDE
VERSION 1.0 2018
13
2.2.1.2 F L O W M A S T E R C O N T R O L
The Flow Master Control regulates the heat output from the XRGI® system and the storage tank (temperature level VL between 80
and 85 °C) into the heating system by means of the controllable pump and the valve of the Flow Master so that the required flow
temperature Tf (= setpoint) is reached. The setpoint for Tf is set on the iQ-Control Panel.
Please note:
Once the actual temperature Tf falls below the setpoint, the controllable pump in the Flow Master will start and the control valve will
open. 85 °C hot water from the XRGI® system and/or storage tank will be mixed into in the heating network until the setpoint Tf is
reached. The discharge from the storage tank will be maximised with the power that is possible according to the installed Flow Master.
The temperature sensor Tb ensures that not too much 85 °C warm water is injected into the heating network by the adjustable pump
(to prevent backflow). The temperature sensor Tr detects the temperature of the return water in the system. If the temperature of the
system‘s return water is too high for engine cooling, the Flow Master will stop the injection and the return heating water will bypass
the XRGI® system.
When the storage tank is empty (because of continuously higher heat demand to the heating network than the heat production in
the XRGI® system), the discharge from the storage tank will sometimes stop in order to fill the storage tank. In this case, the heat supply
is automatically supplied by the boiler (the boiler will be activated if the temperature falls below the flow temperature at setpoint
VL in the boiler). While the storage tank is being refilled, the boiler as the sole source of heat in the system prevents the boiler from
constantly switching on and off and, in this way, saves energy.
When the storage tank is sufficiently refilled, it automatically begins to discharge heat into the system again and boiler operation
stops, but only if the heat in the XRGI® system and the storage tank with the installed Flow Master is sufficient to meet demand.
Tf is set to a maximum of 79.9 °C and should always be higher than the maximum boiler temperature so that the
XRGI® system can deliver the base heat load (Δ 5 K is sufficient).
SCOPE OF DELIVERY
Modules
Flow Master Control unit, four PT100 sensors, one Q-Network cable
CABLE DIMENSIONS
PT100 sensor cable
m
3
Q-Network cable
m
5
DIMENSIONS
AND WEIGHT
Dimensions, W x H x D
mm
180 x 60 x 130
Weight
kg
0.5
Fig. 2.21 - Flow Master Control
Содержание XRGI 15
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