FIGURE 4. AQUAIR S PCB REMOVAL
FIGURE 5. AIR CIRCULATION FAN RE-
MOVAL
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15. COMMISSIONING
15.1
Ensure the heater is correctly fitted with water and all air vented from the flow and return circuits.
15.2
Switch on electrical supply.
15.3 Setting maximum speed.
15.3.1 Make a short across Thermista-stat connections, if fitted, and adjust the fan speed as
required, then remove the short.
15.4 Setting minimum fan speed.
15.4.1 Make a short across the pipe sensor and adjust the fan speed as required, then remove
short.
15.5 WITH THERMISTA-STAT FITTED
15.5.1 Turn up Thermista-stat to call for heat.
15.5.2 Check for 230V on switch live out.
15.5.3 With the water at the required temperature, ensure fan starts.
15.5.4 Allow the system to warm up and check temperature rise across unit is 40 °C.
15.5.5 Set water differential to 20 °C using lock shield valve or equivalent.
15.5.6 Turn off Thermista-stat and check there is NO 230V on switch live out.
15.5.7 Check fan stops when water cools to required temperature.
15.6 WITH NO THERMISTA-STAT FITTED
15.6.1 With the water at the required temperature ensure fan starts.
15.6.2 Allow the system to warm up and check temperature rise across unit is 40 °C.
15.6.3 Set water differential to 20 °C using lock shield valve or equivalent.
15.6.4 Check fan stops when water cools to required temperature.
16. SERVICING & MAINTENANCE
16.1
ROUTINE MAINTENANCE
IMPORTANT: Before carrying out any work on the unit, ALWAYS ENSURE THE
MAINS ELECTRICAL SUPPLY IS ISOLATED FROM THE UNIT.
Remove the filter and unscrew the two retaining screws holding the front cover on the unit, gen-
tly pull it forward. Servicing and maintenance should be carried out at least once per year.
16.1.1 Check that the heat exchanger airways is free from
obstructions. If necessary, clean with a vacuum cleaner
from the air inspection panel, taking care to not damage
the airways.
16.1.2 Check the condition of the external strainer, cleaning as
necessary.
16.1.3 Check that the air filter is being regularly cleaned in ac-
cordance with the User Instructions.
16.2 PCB REMOVAL & REPLACEMENT
16.2.1 Disconnect the wiring at the PCB terminal block.
16.2.2 Release the 4 clips securing the PCB and withdraw the
panel, disconnecting the fan supply lead at the fan tray
terminal block.
13.2.3 Reassemble or replace in reverse order.
16.4 FAN REMOVAL
16.4.1 Disconnect the electrical connections.
16.4.2 Remove the screws securing the fan and withdraw on the
location runners.
16.4.3 Reassemble or replace in reverse order.
LOCATION
RUNNERS
SCREW
CLIPS
