Domestic Hot Water Heat Pump Service Manual
21
Heat pump operation (Optimal 1 and Optimal 2)
If the water temperature is below set point temperature minus hysteresis, the HP starts its operation
(normally at 00:00).
Optimal 1
: The HP is allowed to run also during the day(according to MODE of operation
Optimal 2
: The HP is always allowed to run in the night period(between00:00 and 5:00) plus it is
allowed to run in the periods described by D17/D18 (Low tariff period weekday/weekend)
7.9
B1 Ventilation
This mode is used for the ventilation of air from a room and distributed either into the DHW-HP
room location or ducted outside of the building.
Using the function B1 (Ventilation) the DHW-HP can be set to 3 operation modes, Off, single
speed or 2 speed
To complete the ventilation mode setup B2 (Ventilation Fan Speed) can be set.
Code
Set point
name
Description
Range
Factory
setting
B1
Ventilation
OFF
The fan switches off when the heat pump does not run.
OFF/
Single
Speed/
2Speeds
OFF
Single
speed
The fan is always running at a single fixed speed (B2 Fan speed), both
when the heat pump is operating and when it is not.
2 Speeds
The fan is always in operation but it runs normally at a higher speed D6
(Fan AUTO Speed) when the heat pump starts operating and at (B2 Fan
speed) when it is not operating.
B2
Fan speed
The main fan speed regulation for the ventilation function. There are
three ventilation level that can be selected: LOW D5 (Min Fan Speed),
MEDIUM D4 (Fan medium speed) HIGH D3 (Max fan speed).
LOW/
MEDIUM/
HIGH
HIGH