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MULTIVENT
VENTILATION SYSTEM
Installation, Set-up and Operating Instructions
Stock Ref. N°
MV250H(RF) 183010A (80W)
MV350H(RF) 183015A (100W)
220-240V/1/50Hz
READ INSTRUCTIONS IN CONJUNCTION WITH ILLUSTRATIONS
READ AND SAVE THESE INSTRUCTIONS
Installation and Wiring Instructions for the Multivent Humidistat Extract Fans.
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Summary of Contents for Vent-Axia MV250H(RF)
- Page 1 MULTIVENT VENTILATION SYSTEM Installation, Set-up and Operating Instructions Stock Ref. N° MV250H(RF) 183010A (80W) MV350H(RF) 183015A (100W) 220-240V/1/50Hz READ INSTRUCTIONS IN CONJUNCTION WITH ILLUSTRATIONS READ AND SAVE THESE INSTRUCTIONS Installation and Wiring Instructions for the Multivent Humidistat Extract Fans.
- Page 2 C. Ensure that the mains supply (Voltage, Frequency and Phase) complies with the rating label. D. The Unit should only be used in conjunction with the appropriate Vent-Axia products. E. It is recommended that the connection to the terminal box is made with flexible cable/conduit.
- Page 3 INTRODUCTION NOTES. The MULTIVENT range is designed for simultaneous ventilation for a maximum of up to four separate areas such as bathrooms, kitchens and toilets. The range can be mounted in three different orientations for convenient installation in roof voids with a height of 250mm or greater. An integral humidistat is provided to automatically trigger an increased airflow in order to quickly remove any build up of humid air caused by showers, cooking etc.
- Page 4 See the dimensional details below for the mounting hole positions. Condensate Drain Condensate Drain On the unit housing. Under the lid. INSTALLATION 1. Position the MULTIVENT, taking into consideration the position of the rooms to be ventilated, the exhaust position, the drainage position and the electrical services. Ensure there is adequate access for installation and maintenance.
- Page 5 HUMIDITY ADJUSTMENT. Adjust potentiometer to the required humidistat setting, Fig. 2. To increase the humidistat set point, rotate the adjuster anticlockwise and to decrease the humidistat set point rotate the adjuster clockwise. Fig. 2 Humidity adjustment The Multivent reacts automatically to an increase in %RH above the set point value. If high humidity is detected, the fan speed increases to medium for 30 minutes.
- Page 6 WIRELESS CONTROLLER (Available stock ref. 426035) The selection switch in the Multivent unit and the switch in the hand held transmitter must be set exactly the same. The factory setting is 5678 but it is inadvisable to retain this setting. a) The Multivent Selection Switch.
- Page 7 c) Humidity Response : The Multivent reacts automatically to an increase in %RH above the set point value and the manner in which this triggers will increase airflow depending on the original speed setting, as follows: Low Speed Setting: If high humidity is detected, the fan speed increases to medium for 30 minutes. At the end of this period, if high humidity is still detected, the fan speed increases to high for 15 minutes.
- Page 8 ********************************************************************** As part of the policy of continuous product improvement Vent-Axia reserve the right to alter specifications without notice. Head Office: Fleming Way, Crawley, West Sussex RH10 9YX...
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