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13. FAN PERFORMANCE
14. OPERATING MODES
14.1 HIGH TEMPERATURE MODE
14.1.1
For high temperature mode, the J1 pins 1 + 2 have NO jumper.
14.1.2 With a Thermista-stat connected (see note below), the fan will run when a water temp.
of 60 °C is reached and it stops when the water temperature falls to 42 °C. The fan
speed is controlled by the Thermista-stat demand.
14.1.3 With no Thermista-stat connected, the fan will run when a water temperature of 44 °C is
reached, the fan speed is controlled by the water temperature. The maximum fan speed
is reached when the water temperature is at 60 °C.
14.2 LOW TEMPERATURE MODE
14.2.1 For low temperature mode, J1 has a jumper across pins 1 + 2.
14.2.2 With the Thermista-stat connected, the fan will run when a water temperature of 33
°C is reached and it stops when the water temperature falls to 20 °C. The fan speed is
controlled by the Thermista-stat demand.
14.2.3 With no Thermista-stat connected, the fan will run when a water temperature of 22 °C is
reached, the fan speed is controlled by the water temperature. The maximum fan speed
is reached when the water temperature is 32 °C.
NOTE: Thermista-stat to be ordered separately.
IMPORTANT:
On installations where there is a single Boiler & Aquair, the Johnson & Starley
preferred method of control is to link between TPV + 3 (see Figure 4) and to fit the thermostat
and time control to the boiler. The Aquair will then operate according to the pipe temperature.
FIGURE 3. AQUAIR S FAN PERFORMANCE GRAPH
0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200m³/h
180
160
140
120
100
80
60
40
20
0
AQUAIR 10
AQUAIR 16
AQUAIR 20
RESIS
TA
NCE EXTERNAL TO HEA
TE
R
FAN PERFORMANCE
