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INTRODUCTORY NOTES
The MVDC & Sentinel Multivent units are designed for simultaneous extract ventilation of multiple wet
rooms such as bathrooms, kitchens and toilets. The units use a highly efficient backward curved centrifugal
motor impeller set and are designed for continuous 24-hour use.
Depending on the model, they feature either 3 or4 settable speeds and can be configured to change speed
based on a wide range of sensor or control inputs as depicted below
Model
MVDC-MS
Speeds
Max airflow
m3/hr (0Pa)
Switched Live Input
(LS)
RS485
Connectivity
Analogue Input
0-10V
Digital Input
Humidity Sensor
CO2 Sensor
Wireless Receiver
The units can be precisely programmed to determine how they respond to changes in sensor values or the
status of the various signal inputs. The units will run at a normal flowrate until a sensor or input change
causes it to change speed. In the case of the Switched Live and Digital inputs the units will perform a step
change in speed to the appropriate new level. In the case of the Analogue inputs, Humidity Sensor and
CO2 sensor the unit can be programmed to give a proportional response to the change in conditions.
INSTALLATION
Position the unit, taking into consideration the position of the rooms to be ventilated, the exhaust position
and the electrical services. Ensure there is adequate access for installation and maintenance.
If the unit is sited in the heated void of the dwelling a condensate drain should not be necessary.
When sited in a cold void, consideration should be given to fitment of a condensate drain. Alternatively, the
unit and ducting can be externally insulated to minimize condensation within the units housing.
To reduce the system resistance in your duct system, and therefore lower the speed, power consumption
and noise of the fan, follow these guidelines:
1.1. Keep the length of duct runs to a minimum, particularly the exhaust duct run.
1.2. If you need to use flexible ducting, make sure that it is fully extended and not crushed,
sagging or torn.
1.3. Try to minimize the use of diffusers/valves by having similar length duct runs to the inlets.
1.4. The bend radius (measured to the inside of the bend) should be at least 1x the duct diameter.
1.5. Avoid having any bends, filters or other obstructions within 250mm of the fan inlets and outlet.
1.6. Set the valves to their maximally opened positions for a minimal pressure drop.
Securely mount the unit through the mounting holes on the casing using appropriate fixings for the
mounting substrate. It is recommended that anti-vibration mounts, acoustic mat or rubber bushes are used.
Fixings (not supplied) to be capable of securing 4 x the weight of the unit. Unit weight: 4.1kg
SMV
MVDC-MS H
H
3
3
430
430
Yes
Yes
No
No
Yes
Yes
Yes
Yes
No
Yes
No
No
No
No
SMV
SMV
HX
HX Co2
4
4
463
463
463
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Yes
No
Yes
Yes
3
SMV Plus
SMV Plus
H
HX
4
4
573
Yes
Yes
Yes
Yes
Yes
No
No
SMV Plus
HX Co2
4
4
573
573
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
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