Lennox AQUALEAN AWC Application Manual page 26

INSTALLATION
3.2.- UNIT INSTALLATION
INSTALLATION PROCESS
• After supply the power to the unit and connect inlet/outlet water:
- Connect the gauges in high pressure and low pressure side.
- Use a temperature probe in the compressor gas pipe and another ones in the inlet and outlet water pipes.
- Start water pump.
- Make sure to close the unit all panels have to be correctly situated.
- Start the unit and make sure that the thermostat temperature adjustment is correct.
- Check the correct water fl ow with a differential gauge device connected between the inlet and outlet water connections in order
to know the pressure difference. Check it according to the capacity table values.
In addition, you can know the correct water fl ow with Dt measurement (inlet temperature ºC - outlet temperature ºC).
This value has to be the same as the value calculated with this formula:
a) Cooling mode
a) Heating mode
All the data water fl ow, cooling / heating capacity and power input are on the capacity tables according to each model and the working
conditions.
• After a few minutes, when the unit will be stabilised, you have to verify:
- High and low pressure values and in addition saturation temperatures according to the correct working mode of the unit.
- Gas reheating values are below 12ºC.
If it is not correct, please check expansion system and refrigerant leaks.
If the compressor noise is very high and in addition, high and low pressure values are similar,
it can be possible a wrong phase electrical connection. In this case, please change the
connection for two phases. (Units 012 to 020).
- Outlet and inlet water temperature are correct according to the water fl ow which is between specifi ed values.
(Units 007 to 020).
• After verify the correct working mode, please stop the unit, disconnect the gauges and temperature probes. and
clean water fi lter.
The unit can be work properly until next maintenance revision.
• 24 •
[Cooling capacity (kW) + Total absorbed power (kW)] x 860
______________________________________________
∆t =
Water fl ow (l/h)
[Heating capacity (kW) + Total absorbed power (kW)] x 860
____________________________________________
∆t =
Water fl ow (l/h)
AQUALEAN - AWC/AWH - MIL118E-1407 / 10-2013