Dantherm HRV 5, Service Manual

Page: 18 / 158

16
Functions,
continued
Electric heating el-
ement
(accessory)
The electric heating element switches on when the supply air temperature drops to a
temperature lower than the heater set point (factory setting = 18 °C). The electric heat-
ing element switches off when the temperature has rised to a temperature which is min-
imum 2 °C higher than the heater set point.
See ”User’s guide”, page 21 to change set points.
The electric heating element has 10 steps. The function of these steps is to keep the
electric heating element lit for 1 to 10 seconds during a period of 10 seconds. The
steps are controlled in accordance with the following function:
Every 60 second the control automatically checks the supply air temperature T2 as fol-
lows:
Condition Action
If supply air temperature T2 is lower than T
min
Increases by one heat step
If supply air temperature T2 is between T
min
and T
min
+2
Remains on actual heat step
If supply air temperature T2 is higher than T
min
+2 Goes down one by one heat
step
Electric heating el-
ement display The actual heat step is shown in right side of display.
Here 10 heat steps are displayed.
Programs You can programme up to 20 different program sequences (from P01 to P20). For set-
ting of programs,
see the section ”How to set programmes” page 28.
Illustration of air
flows
This illustrates the air flow of the HRV 5:
Continued overleaf