Nibe F205P - Pipe Connections; General

13
F205P
For the Installer
Pipe connections
Pipe connections
General
This installation is subject to building regulation approval,
notify the Local Authority of intention to install.
Use only replacement parts recommended by the manufac-
turer.
Pipe installation must be carried out in accordance with
current norms and directives.
All domestic hot water circuits, connections and fittings
must be in accordance with the relevant standards and wa-
ter supply regulations. It should also be in accordance with
the relevant requirements of the Local Authority and the
Building Regulations relevant to the location of installation.
BS 6700 Services supplying water for domestic use within
buildings and their cartilages.
Water Supply (Water Fitting) Regulations 1999 or The
Water Bylaws 2000 (Scotland).
The installation of the heat pump should follow best prac-
tice as covered in the following:
BS 5449 Forced circulation hot water central heating sys-
tems for domestic premises.
BS 15450 Heating systems in buildings – Design of heat
pump heating systems.
The system requires a low-temperature dimensioning of
the radiator circuit. At DUT, the highest recommended
500 mm maximum
300 mm
minimum
Tundish
Metal discharge pipe from
temperature relief valve to tundish.
Metal discharge pipe from tundish,
with continous fall.
Discharge below
fixed grating.
Fixed grating
Trapped gulle
y
Possible wall
Safety device
(e.g.temperature
relief valve).
Valve outlet
size
Minimum size
of discharge
pipe
Minimum size of discharge
pipe from tundish
Maximum resistance allowed,
expressed as a lenght of straight
pipe (i.e. no elbows or bends)
Resistance created by
each elbow or bend
G1/2 15 mm 22 mm up to 9 m 0,8 m
G1/2 15 mm 28 mm up to 18 m 1,0 m
G1/2 15 mm 35 mm up to 27 m 1,4 m
<G3>/4 22 mm 28 mm up to 9 m 1,0 m
<G3>/4 22 mm 35 mm up to 18 m 1,4 m
<G3>/4 22 mm 42 mm up to 27 m 1,7 m
G1 28 mm 35 mm up to 9 m 1,4 m
G1 28 mm 42 mm up to 18 m 1,7 m
G1 28 mm 54 mm up to 27 m 2,3 m
Table sizing of copper discharge pipe for common temper-
ature relief valve outlet sizes.
temperatures are 55 °C on the flow line and 45 °C on the
return line.
When the circulation pump is running, the flow in the
radiator circuit must not be completely stopped. When
connecting to a system with thermostats on all radiators, a
relief valve must be fitted, or some of the thermostats must
be removed to ensure sufficient flow.
The total volume is 240 litres, with 170 litres in the water
heater and 70 litres in the boiler section.
The pressure vessel in the F205P is approved for max 9.0
bar (0.9 MPa) in the water heater and 2.5 bar (0.25 MPa)
in the double shell section.
Overflow water from the evaporator collection tray and
safety valves goes via non-pressurised collecting pipes to a
drain so that hot water splashes cannot cause injury. The
outlet of the overflow pipe should be visible and clearly
away from any electrical components. Likewise should the
discharge pipes (tundishes), drain valves and motorised val-
ves be positioned clearly away from any electrical compo-
nents. These non-pressurised collecting pipes shall not be
used for anything else. A discharge pipe from the tundish
(108) connected to the expansion reliet valve (47) (safety
valve) shall also be connected to a drain in the same way.
No valve should be fitted between the pressure reduction
valve (expansion valve) and the storage cylinder.
Do not use collection funnel (99) to dis-
charge pipes from tundish (109).
Note!
This installation is subject to building regu-
lation approval, notify the local Authority
of intention to install.
Note!
Use only manufacturer’s recommended
replacement parts.
Note!