Connecting The Ks Solar Pump Station; Connection As High-Performance Dhw Tank; Series Connection Of The Lower And Upper Heat - Buderus SM80/5 Notice D'installation Et D'entretien

5
Installation
▶ Feed the temperature sensor [4] with the compensating spring [3]
into the sensor well [5].
▶ Attach bracket [6] to DHW cylinder by means of 4 self-tapping sheet
metal screws [1].
▶ Replace the cover of the aquastat [2].
5
4
3
Fig. 17 Installing the aquastat
[1] Self-tapping screws
[2] Aquastat
[3] Compensating spring
[4] Temperature sensor
[5] Sensor Well
[6] Holder
5.4

Connecting the KS solar pump station

WARNING: Risk of equipment damage from very high
operating temperatures and pressures!
▶ Use pressure- and temperature-resistant piping
materials.
▶ Do not use any galvanized piping, pipe connections
or graphite seals.
▶ Do not use any plastic piping or connections of any
kind.
▶ When using soldered connections in the entire solar
circuit, use high-temperature solder (melting point
≥ 455 °F (235 °C)).
To ensure proper operation of the solar thermal system,
air must be bled adequately from the entire system.
For information on bleeding the solar thermal system,
refer to the installation instructions for the KS solar
pump station.
▶ Attach the KS solar pump station [4] to the lower heat exchanger in
the DHW tank at the VS (solar supply) and RS
1
connections.
▶ Attach the reheating device to the upper heat exchanger in the DHW
tank at the VS2 (storage tank supply) and RS2 (storage tank return)
connections.
▶ Use piping and pipe connections made of copper, brass and non-
galvanized steel for the connection between the KS solar pump
station [4] and DHW tank [5].
14
6
2 1
6 720 800 155-04.1ITL
(solar return)
1
Fig. 18 Connecting the KS solar pump station (schematic illustration)
[1] Collector supply connection
[2] Collector return connection
[3] Oil-/gas-fired boiler
[4] Solar pump station
[5] DHW tanks
Grounding the piping
Allow only an authorized contractor to make all the
piping connections.
▶ Attach one grounding clamp each to the supply and return pipes (at
any position).
▶ Connect the grounding clamps to the building's grounding rod by
means of standard bonding cables AWG9.
Laying pipes with an automatic air vent valve on the roof (available
as accessory)
▶ Pipes to the air vent valve should follow a rising gradient. For every
downwards change of direction, an additional air separator with air
vent valve is required (heat-resistant to 302 °F (150 °C)).
5.5

Connection as high-performance DHW tank

The DHW tank can also be used as a high-performance DHW tank.
In this case, 2 connection configurations are possible.
5.5.1 Series connection of the lower and upper heat exchanger
▶ Attach the upper connection on the lower heat exchanger to the
lower connection on the upper heat exchanger in the DHW tank.
▶ Attach the tank charging pump to the upper connection on the upper
heat exchanger.
When the heat exchangers are connected in series, the
pressure loss across the two coils is cumulative.
Pressure drop of connecting pipe must be added. Ensure
that the pump used can handle the resulting pressure
drop.
▶ Attach the lower connection on the lower heat exchanger to the
return piping on the boiler.
SM80/5, SM100/5 – 6 720 800 156 (2014/10)