External Hydraulic Circuit; Hydraulic Connections; Draining The Defrosting Waste Water (Aqwh Only) - SystemAir AQWL 1404 STD-LN Manuel D'installation

Then:
Provide the evaporator with a by-pass circuit equipped with a
n
valve to wash the plant.
Insulate the piping, to prevent the risk of heat loss.
n
Position a filter on the suction side of the evaporator of the heat
n
recovery condenser.
Unit
componEnts
I Pressure gauge connection
s Gate valve
F1 Flow Switch
GA Flexible hoses
Before filling the circuit, it is important to check
that it is free from any foreign matter, sand,
gravels, rust, welding deposits, waste and other
WARNING materials that may damage the evaporator.
When cleaning the lines, it is recommended to create a circuit by-
pass. It is important to mount a filtering medium (30 mesh) upstream
of the chiller.
If necessary, the water required to fill the circuit
must be treated to obtain the requested PH.
NOTE
If necessary, the water required to fill the circuit must be treated to
obtain the requested PH.
4 - Installation (continued)
Installation Flow Switch

External Hydraulic Circuit

Connection Diagram
R Drain cock
t Thermometer
F Filter
I1/I2 Pressure gauge connection to measure pressure drop or head pressure
4.4 Hydraulic connection
The water inlet/outlet fittings shall conform to the instructions
provided by the plates affixed near the connection points.
4.5 Draining the defrosting waste water (for
When heat pump units work in heating mode, during defrosting
cycles, they may discharge water from the base. This is why the
units should be installed at least 200 mm above the floor level, so
as to allow the free drainage of waste water, without the risk of
producing ice banks.
The heat pump units must be installed in positions where the
defrosting water cannot create any damage.
15
heat pump unit only)