Adjusting the speed for the constant-speed pump
▪
Start with maximum speed setting.
▪
Check that the circulation pump is running by listening, placing a hand on the circulation pump and listen for air in the system.
▪
If flow is detected, normally within 60 seconds, decrease the setting until the flow is so low that the F in the default display disap-
pears.
If no flow is registered, check the system for air and bleed if necessary. See chapter "Filling and
bleeding". Also check that the flow sensor is in the correct direction (check the arrow on the flow
sensor) and also that all heat system valves are open.
▪
Set the speed on the pump to the value where sufficient flow is guaranteed.
▪
Check that the delta temperature (the difference between the supply line and return line) should be 7–10°C. The delta is checked in
the INFORMATION MENU, see description as follows.
Check the delta temperature
The time it takes to get a correct and stable reading of the delta is dependant of the size of the heating sys-
tem.
The following settings are made in the INFORMATION MENU. If not already in the INFORMATION MENU, enter the INFORMATION MENU
from the default display by pressing (<) arrow. Use + or – to move up and down in the menu.
▪
INFORMATION MENU
▪
OP. DATA
▪
SUPPLY LINE / RETURN LINE
8.3 Reinstall the lower front hatch and side cover
After completed checks and tests the lower front hatch and side cover must be reinstalled on the outdoor unit. See figure 5.
Fig. 5: Reinstall lower front hatch and side cover
Commissioning Atec
Thermia Värmepumpar VIGFG102
25
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