EC POWER XRGI 20G-TO, Manual

Page: 46 / 168

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Version 1.0 - 2012 Manual XrGi 20G-To
3.3.2.1. return water temperature
3.3.2.2. Hydraulic connections
3.3.2.3. electrical connections
Variable volume flow rate – top stable diameter (1¼” PT) – only if
Flow Control is connected.
Storage tank connection, top–centre stable diameter (1¼” PT).
Storage tank connection, bottom stable diameter (1¼” PT).
Hydraulic connection: flow from Power Unit – top left (1¼” PT).
Hydraulic connection: return to Power Unit – lower left (1¼” PT).
Electrical connection: two connections for Q-Network and two to
Power Unit.
Automatic microbubble separator mounted on top of the Q60-
Heat Distributor
The primary side connection from the Power Unit to the Q60-Heat Distributor is described in section 3.4.2. When installing
on the secondary side of the Q60-Heat Distributor (heat distribution/building installation), the relevant standards and rules
in heating system construction must be observed. This includes the installation of a safety valve and an expansion vessel
according to EN 12828 for direct heating, tR ≤ 105 °C depending on the conditions of the building. If required, these devices
may be connected directly to the Q60-Heat Distributor via an unused return connection. The Q60-Heat Distributor’s secon-
dary side can be pressurised up to 6 bar (not to be confused with the Q60-Heat Distributor engine side, where the operating
pressure is 1.5 bar, and is already protected (factory configuration)).
Shutoff elements on the secondary side are essential to avoid the need to drain large parts of the secondary network when
servicing and maintaining the Q60-Heat Distributor. If it cannot be ruled out that dirt enters the system from the secondary
side, a dirt pan must be installed in the system return pipe upstream of the Q60-Heat Distributor to protect the Q60-Heat
Distributor and plate heat exchanger.
The Q60-Heat Distributor needs a separate 230 V grid feed, protected by at least a 10 A fuse (10 A/250 V AC connector).
The network lines used are Q-Network Cables (SFTP (CAT 6))with RJ45 plugs, which are used for the Q60-Heat Distributor
to communicate with other Q-Network Components.
The return water temperature in the water circuit to the Q60-Heat Distributor should not exceed 65 °C. The aim is to have the
water cool by at least 20-30 °C between the system’s flow and return.
In systems with heat pumps, a return temperature of at least 40 °C must be maintained. It is thus necessary to fit return tem-
perature control valves to all uncontrolled short circuits or to take other suitable precautions.
Note: the lower the return water temperature the more efficient the storage tank and the more rational
the energy use.
3.3.2. Q60-Heat Distributor connections
Fig. 3.6.
FLOW
ENGINE COLD
STORAGE TOP
STORAGE BOTTOM
ENGINE HOT
Q-NETWORK
230 V