Baxi Assure AWHP-IDU 4-8 E, Installation And Service Manual, Page: 62 / 116

9.2.9 Installing a buffer tank
A buffer tank is used to separate the heating circuits or to store energy.
The buffer tank is used with one or two temperature sensors. The CIRCA0
circuit cannot be used at the same time as a buffer tank.
1. Connect the temperature sensor(s) for the buffer tank to the
corresponding connectors:
Tab.51
Connection Description
Fig.64 One sensor
MW-1001293-1
SCB-10
Buffer tank temperature sensor to the Tsyst1 connector on the
SCB-10 PCB
Fig.65 Two sensors
MW-1001295-1
SCB-10
Buffer tank bottom temperature sensor to the Tsyst1 con­
nector on the SCB-10 PCB
Buffer tank top temperature sensor to the Tsyst2 connector
on the SCB-10 PCB
2. Configure the pump for the CIRCA0 zone as a system pump:
Tab.52
Access Parameter Adjustment required
23.5
Air Src Heat pump > Parameters,
counters, signals > Adv. Parameters
Boiler Pump function (AP102) No: all demands
3. Deactivate the CIRCA0 : circuit
Tab.53
Access Parameter Adjustment required
21.7
CIRCA0
Zone Function (CP020) Disable
4. Activate the buffer tank function by selecting the number of sensors:
Tab.54
Access Parameter Adjustment required
> Installation Setup > Buffer tank off Type Buffer Tank
(BP001)
Depending on the situation:
Disabled
One sensor
Two sensors
On
9 Settings
62 7762758 - v05 - 19082020