Filling The Dhw Calorifer; 4.10 Filling The Primary Solar Circuit - Baxi UBVT 200 DC Installation, User And Service Manual

4. Installation
4.9

Filling the DHW calorifer

4.10 Filling the primary solar circuit

25
n Domestic hot water circulation loop
To guarantee the availability of hot water as soon as the taps are
turned on, a circulation loop between the draw-off points and the
recirculation pipes in the DHW calorifer can be installed. A non-return
valve must be included in this loop.
To run the domestic hot water circulation loop via the boiler
control system or an additional timer program to optimse
energy consumption.
n Measures to take to prevent hot water flow reversal
Fit a one-way valve to the domestic cold water circuit.
CAUTION
Initial commissioning must be done by a qualified
professional.
1. Flush the domestic circuit and fill the calorifer through the cold
water inlet tube.
2. Open a hot water tap.
3. Completely fill the DHW calorifer via the cold water inlet pipe,
leaving the hot water valve open.
4. Close the hot water valve when the water flow is regular, without
noise in the pipes.
5. Carefully vent all of the DHW pipes by repeating steps 2 to 4 for
each hot water tap.
Venting the domestic hot water calorifer and the mains
network helps to prevent noises and banging caused by
trapped air moving through the pipes during draw-off.
6. Vent the tank exchanger circuit using the bleed valve provided for
this purpose.
7. Check the safety devices (particularly the valve or safety unit),
referring to the instructions provided with these components.
CAUTION
During the heating process, a certain amount of water may
flow through the valve or safety unit, this is caused by
water expansion. This phenomenon is completely normal
and must in no event be hindered.
¼See installation and commissioning instructions for the solar
station.
UBVT 200...400 SC UBVT 200...500 DC
12/02/2013 - 300027525-001-02