Baxi PBS-i WH2 Series, User Manual, Page: 87 / 180

2. Ensure the base meets the following specifications:
Specifications Reason
Maximum width equal to the width of the outdoor unit.
Height at least 200 mm greater then the average depth of the
covering of snow.
This helps to protect the exchanger from snow and prevent
the formation of ice during the defrosting operation.
Location as far as possible from the thoroughfare. The condensates discharge may freeze, causing a potential
hazard (sheet of black ice).
3. If the outside temperatures drop below zero, take the necessary
precautions to prevent the risk of freezing in the evacuation pipes.
4. Place the outdoor units beside each other and not on top of each
other to prevent the condensates from the lower unit to freeze.
6.4.5 Installing the outdoor unit on the ground
When mounting on the ground, a concrete base must be installed, with no
rigid connection to the building served to avoid the transmission of
vibrations. Position a rubber floor support.
The data plate must be accessible at all times.
1. Dig a run-off channel with a pebble bed.
2. Install a concrete base frame with a minimum height of 200 mm
capable of bearing the weight of the outdoor unit.
3. Install the outdoor unit on the concrete base frame.
6.5 Hydraulic connections
6.5.1 Special precautions for the connection of the heating
circuit
Caution
The hydraulic installation must be capable of handling a minimum
flow rate at all times:
If radiators are connected directly to the heating circuit: install a
differential valve between the indoor module and the heating
circuit.
Leave one heating circuit without a thermostatic valve and/or
without a solenoid valve.
Fit drainage valves between the indoor module and the heating
circuit.
During connection, it is imperative that the standards and corresponding
local directives be respected.
Depending on the heating system installation, install a filter on the
heating return circuit.
Depending on the heating system installation, install a magnetic and/or
mechanical sludge collector on the heating return circuit, just before the
boiler.
If components made from composite materials are used (polyethylene
connection pipes or flexible hose), we recommend components with an
anti-oxygen barrier.
Germany: anti-oxygen barrier according to the DIN 4726 standard.
6.5.2 Connecting the heating circuit
Heating installations must be able to guarantee a minimum flow rate at all
times. This is defined by the parameter HP010. The nominal flow rate
sought by the heat pump for optimum running is defined by the parameter
Fig.35
MW-M001452-3
200
2
1
3
6 Installation
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