Vent-Axia Lo-Carbon SOLO Plus SELV HT, Installation And Wiring Instructions

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1. SELECTING THE CONSTANT TRICKLE OPTION -
Switch dip switch 2 into the ON position to activate the
constant trickle operation. To disable the constant trickle option, move dip switch 2 into the OFF position. (Fig 7).
2. SELECTING THE TRICKLE SPEED (if enabled)
This will determine the speed at which the fan will run continuously if the constant trickle speed option is enabled (1
above).
•
Low trickle speed – Switch dip switch 1 into the OFF position (Fig 7).
•
High trickle speed – Switch dip switch 1 into the ON position (Fig 7).
3. SELECTING THE INSTALLATION RUNNING MODE
This will determine the speed at which the fan will run when activated by either the Pull-cord/LS line/Humidity/PIR.
• Wall mode – Switch dip switch 3 into the OFF position (Fig 7).
• Ducted mode – Switch dip switch 3 into the ON position (Fig 7).
4. SELECTING THE DELAY-ON OPTION
(T and HT models) - Switch dip switch 4 into the ON position to activate
the delay-on feature. This will prevent the fan from going to boost for approximately 2 minutes. If the Switch Live is
disconnected (switched off) within this period the fan will not boost. If the Switch Live is still active after the period the
fan will boost (Fig 7).
5. TIMER ADJUSTMENT (T, HT, TM models)
The overrun time period is factory set to 15 minutes. The overrun time period may be adjusted from 5-30 minutes
by altering the adjuster on the control PCB [T] (Fig 7).
i. To REDUCE the operating time, turn the adjuster [T] ANTI-CLOCKWISE (Fig 7).
ii. To INCREASE the operating time, turn the adjuster [T] CLOCKWISE (Fig 7).
6. HUMIDITY ADJUSTMENT (HT model)
The fan’s Humidity Set-Point is factory set to switch the fan on at 72%RH (Fig 7).
i. To LOWER the Set-Point, turn the Humidity Adjuster [H] ANTI-CLOCKWISE. This makes the fan more
sensitive to RH%, i.e. the fan will come on at a lower RH% (Fig 7).
ii. To RAISE the Set-Point, turn the Humidity Adjuster [H] CLOCKWISE. This makes the fan less sensitive to
RH%, i.e. the fan will come on at a higher RH% (Fig 7).
C. WIRING.
WARNING: THE FAN AND ANCILLARY CONTROL EQUIPMENT MUST BE ISOLATED FROM THE
POWER SUPPLY DURING THE INSTALLATION / OR MAINTENANCE.
IMPORTANT
• The Controller MUST be surface mounted to allow air to freely circulate around the unit. When installed in a
loft void it MUST NOT be enclosed or covered with insulation.
1. Select and follow the appropriate wiring diagram (Fig 8-9)
2. It may be necessary to feed the mains cable around between the outside of the Base Housing and the Skirt to
prevent the cable from being trapped.
3. Check all connections have been made correctly and ensure all terminal connections and cable clamps are
securely fastened.
4. Ensure the impeller rotates and is free from obstructions.
D. SERVICING AND MAINTENANCE.
WARNING: THE FAN AND ANCILLARY CONTROL EQUIPMENT MUST BE ISOLATED
FROM THE POWER SUPPLY DURING MAINTENANCE.
1. At intervals appropriate to the installation, the fan should be inspected and if required cleaned to ensure there is
no build-up of dirt or other deposits.
2. If a filter is fitted, remove the filter and wash in warm soapy water.
3. Wipe the inlets and front face with a damp cloth until clean.
4. Once the filter is dry it can be replaced.
The fan has sealed for life bearings, which do not require lubrication.