N
The min. flow found in this procedure is the actual flow that exists in
the current configuration of the system. Seasonal variations with dif-
ferent temperatures may alter the behavior of the system and this may
affect the flow as well. For example, automatic radiator valves may
open or close depending on the temperature.
4.1.2
Find min. flow manually
N
This setting is a manual alternative to the FIND MIN. FLOW function
which runs automatically when activated.
The start flow is maintained for one minute. After one minute, the circulation pump and control system takes over the speed control.
Default setting: 7V, range: 3V – 10V (30 - 100%)
The following settings are made in the Service Menu. If not already in the Service Menu, enter the Service Menu by pressing and holding
left (<) arrow for at least 5 seconds. Use + or – to move up and down in the menu.
▪
SERVICE
▪
OPTIMUM
▪
START FLOW CIRC.
▪
Press + to set the start circulation pump speed. See note below.
▪
Press left arrow several times to exit the SERVICE MENU
N
Start with a high setting, for example 10V.
Check that the circulation pump is running by listening, placing a
hand on the circulation pump and listen for air in the system.
If no flow is registered at 10V, check the system for air and bleed if
necessary. See chapter "Filling and bleeding". Also check that all heat
system valves are open.
If flow is detected, normally within 60 seconds, decrease the setting by
10% (1V) until the flow is so low that the F in the default display disap-
pears.
(You must exit the SERVICE MENU and enter the default display for
each decrease in speed)
Note the last reading for the F in the display and increase that value by
10%. This value is to be used as a setting in START FLOW CIRC.
Commissioning
iTec
Thermia Värmepumpar
VIJSR102
19
