Domestic Hot Water - Airwell PAC BTE UI 4 Manuel D'utilisation

6 - START-UP

6.10 - DOMESTIC HOT WATER

The unit always leads the DHW to the setpoint p429 value.
During the storage (A) phase the temperature drops until
par 432 (by pwd).
During the maintenance (M) phase the temperature drops until
par 431.
It is better to schedule the maintenance phase at night and
during the periods of reduced use of domestic hot water.
If the DHW set point is increased, check that the thermostatic
mixer valve is not set too high.
Example:
48°C
45°C
42°C
Scheduling
The scheduling allows to set the daily time bands and to
allocate the destre operating mode :
Ricirculation
Storage
Programming
6.11 - ANTI-LEGIONELLA
Enable the function:
Par 435 Enable anti-legionella (1= enable)
Par 436 Antil-egionella set point (password-protected).
*
The unit parameters are overwritten by RCW15 remote keyboard. Make the customization by using RCW15
A
M
Anti-legionnella scheduling
The anti-Legionnaire's disease cycle disinfects the DHW
thermally.
The unit is delivered with a set point of 65°C (par. 436,
password protected).
The scheduling allows to set :
Cadence:
Disabled
Weekly
Monthly
Annual
Day
Start hour
We recommend a weekly or monthly schedule.
6.12 - RECIRCULATION DHW CALIBRATION
DHW recirculation, if foreseen in the system, is carried out by
making the sanitary water circulate through the unit pump.
The pump alternates ON and OFF cycles with duration that
may be set by parameters (password protected):
par.441 Recirculation Time OFF
par.440 Recirculation Time ON.
The recirculation function is active only at the times foreseen
by the DHW scheduler:
Maintenance +recirculation
Reload + recirculation
The parameters are the same that manage the anti-
stratification recirculation in the DHW accumulation.
The recirculation still causes some inefficiencies (thermal
dispersions in system piping etc.) therefore duration and
frequency will have to be optimised for the system.
Settings
Parameter
33