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ALNOR
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ventilation systems
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User Manual
HRU-PremAIR
6
.10 Connecting the ground heat exchanger
Heat recovery unit has a possibility to connect the ground heat exchanger. This function allows you to control
a valve that optionally supply air through the ground-to-air heating system. To do this, install a dedicated
damper with the actuator (DATVTML). Damper works by electric actuator DM-ML-06-230. For quick mounting
of the actuators we recommend specially designed stands DA-SUP-S and DA-SUP-M.
Actuators matching DA-SUP-S mountig plate
Actuators matching DA-SUP-M mountig plate
Alnor DM-ML-06
Alnor DM-ML-06
Belimo CM
Alnor DM-ML-08
Belimo LM
Belimo CM
Belimo TR
Belimo NM
When you mount the actuator to the damper, you should remember to:
• the damper was open in the HRU-OUTDOOR direction (not GHE).
• if the actuator can be mounted in the left-right position, make sure it is mounted correctly as described
below.
In order for the valve to operate correctly, the dumper with a DM-ML-06-230 electric actuator should be
connected to X28 in the following order:
1
2
3
DA4MU24-D/DS
DA4MU230-D/DS
DA6MU24-D/DS
DA6MU230-D/DS
General Damper Actuator
4Nm 6Nm
2-Point and 3-Point
For operation of air control dampers in HVAC system
Toque:4Nm 6Nm
Nominal voltage: AC/DC24V AC100…240V
Control: On/Off /2-Point/3-Point
-DS type include 2 groups of auxiliary switches
Technical Specification
DA4MU24-D/DS
DM-ML-06-24-S
DA4MU230-D/DS
DM-ML-06-230-S
Electrical
data
Nominal voltage
AC24V 50/60Hz DC24V
AC100…240V 50/60Hz
Nominal Voltage range
AC/DC 19.2...28.8V
AC85...265V
Power consumption
3W@Nominal toque
0.5W@Holding
3W@Nominal torque
0.7W@Holding
Wire sizing
0.5mm
2
Functional
data
Torque
4Nm
6Nm
4Nm
6Nm
Damper size
0.8m
2
1.2m
2
0.8m
2
1.2m
2
Direction of rotation
Selectable by switch
Manual override
Gearing latch disengaged by push button, self-resetting
Angle of rotation
Max.95
°
Running time
50S
（
95°
）
70S
（
95°
）
50S
（
95°
）
70S
（
95°
）
Sound power level
45dB
Position indication
Mechanical
Working
conditions
Protection class
Ⅲ
(safety low voltage)
Ⅱ
(totally insulated)
Protection degree
IP44
Ambient temperature
-20…+50
℃
Inventory temperature
-30…+80
℃
Humidity test
95%RH, non condensing
／
EN 60730-1
Dimensions
Weight
Dimensions
See “Dimensions”
Shaft length
>50mm
Shaft diameter
○
6...16mm
□
8X8...12 X12mm
Weight
<0.7Kg
Wiring Diagram
Actuator
DM-ML-06-24(230)
2-Point 3-Point
Auxiliary switch
DM-ML-06-24(230)-S
21
22
23
24
25
26
a
b
Resistance load 3A
，
230V
Inductive load 1.5A
，
230V
actuator
X28
1
L out 2 (RL1)
2
L (out 1(RL2)
3
N
The output to control the geothermal heat exchanger valve, can be configured using
Geothermal Heat
Exchanger Valve Output (#195)
from 0 to1.
The automatics controls the valve based on the temperature at the outdoor (Temperature 4 outdoor). If the
Temperature 4 outdoor is lower than the
Geothermal Heat Exchanger Outdoor Temperature Below (#193
)
or higher than the
Geothermal Heat Exchanger Outdoor Temperature Above (#194)
the valve will be
opened and the air going to the unit will be taken from the ground heat exchanger. If the temperature sensor
(Temperature 4 outdoor) is broken or if the above condition is not met the valve will remain closed.
Values
Geothermal Heat Exchanger Outdoor Temperature Below (#193)
and
Geothermal Heat Exchanger
Outdoor Temperature Above (#194)
are set in deafult mode for 5°C and 25°C. They can be edited from the
service tool and the LCD Display controller.
Functional check:
Temperature 4 outdoor >5°C (#193) and <25°C (#194) valve position HRU-OUTDOOR
Temperature 4 outdoor <5°C (#193) and >25°C (#194) valve position HRU-GHE
