Kipp&Zonen CVF4 Ventilation Unit - Manual (Page 11)

11
Instruction Manual - CVF4
The CVF4 consists of:
- Base plate with ventilator, heater and connector
- Replaceable filter plus cover
- Top cover
2.1 Included with the product
The following items are included with the CVF4 ventilation unit:
Ventilation Unit
Cable, pre-wired with 4 pins connector or connector only for customer cable
Fixing kit with screws, washers and Allan key
Instruction sheet
Pack of 5 spare ventilation fan inlet filters
Product Documentation CD
For optional accessories see chapter 3.
2.2 Tools required
If the CVF4 is mounted with the supplied screws only the supplied Allan key is required. Make sure there is space to fasten the
screw under the bottom of the plate. To fasten the radiometers other Allan keys or screwdrivers may be necessary.
2.3 Preparation
Like for any radiometer with 360 ° field of view, make sure there are no obstructions that are higher than ten times their distance
when selecting a location for the CVF4.
2. Installation
2.4 Installation procedure
First the CVF4 is screwed flat on its mounting plate. In case the CVF4 is mounted on a solar tracker, the tracker has to be levelled first.
On our sun trackers the CVF4 is positioned such that the fan sticks out over the edge of the plate. This ensures the air inlet is
never blocked (see picture of the CVF4 on the SOLYS 2 Sun Tracker on the next page). The locations of the CVF4 mounting holes
on the SOLYS 2 top mounting plate are shown below.
When using your own mounting plate, make sure the CVF4 is mounted in the same way with the fan sticking out. The CVF4
mounting holes size and distances are indicated in the drawing below.
The CVF4 is mounted with the supplied 4 washers and 2 screws through mounting plates from 4 to 8 mm thick. The other 2 feet
are for stability but do not need screws.
Then the radiometer is mounted in the CVF4 and levelled with its own levelling feet. Afterwards the radiometer mounting screws
and shoulder washers are fitted (not secured yet).
In case the CVF4 is mounted on a solar tracker, finish the alignment of the tracker first before securing the radiometer screws
because tracker (and radiometer) levelling might need re-adjustment.
After all mounting screws have been secured the cables of the CVF4 and the radiometer can be connected. The radiometer cable
goes (down) through the slit in the CVF4 base plate.
Finally the CVF4 cover can be put on and the two cover nuts can be fastened.
Make sure the cover is horizontal (check equal space around the radiometer dome) and the two cover nuts are fastened hand tight.
SOLYS 2 with top mounting plate and 3 x CVF4 SOLYS 2 with small top mounting plate with CVF4
2.5 Electrical connections
The CVF4 has a 4 wire cable for connecting the 12 VDC to the ventilator and heater. The ground is common for the ventilator,
heater and the tacho output.
The tacho output (Ut in diagram below, pin 4, yellow wire) provides a 5 Volt signal that gives two pulses per revolution. It can
be connected to a data logger to (remotely) check proper operation of the CVF4. The tacho output uses the same power supply
ground (pin 3, green wire).
The nominal speed is 4400 rpm, resulting in 8800 pulses per minute which equals 146 Hz on the tacho output.
Changes often indicate pollution of the filter (higher frequency), or mechanical problems with ventilator (lower frequency).
If sufficient power is available it is advised to use the heater in combination with the ventilator even in warm climates. The
heater will prevent deposition of dew in the morning.
h
>10 x h
4 2
1
2
3
4
5
6
1 3 5 6