H51308-v0A Manuale Istruzioni VTNC - Rhoss

SECTION II: INSTALLATION AND MAINTENANCE
II.2.5
WATER CONNECTIONS
II.2.5.1
IMPORTANT!
The water connections are very important and
particular care should be dedicated to these
operations by specialist personnel.
Connection to the System
The water connections are fixed to the structure of the unit so as to
prevent breakage during the connection of the pipes. However, we
recommend holding the connection in place with a spanner.
The top coil connection has an air bleed valve, while the bottom
connection has a drainage valve which can be adjusted using a 10 mm
spanner or a screwdriver.
VTNC
250
VTNC
IMPORTANT!
The coil can only be partly drained. For complete
drainage we recommend blowing air into the coil.
The pipes must be covered with anti-condensation material, such as
polyurethane, propylene, neoprene or other expanded materials of 5-10
mm thick. In the case of several units installed in one room, the
condensation collection pipe must be installed as illustrated in the
figure.
Model Ø connections
25 ¾”
30 ¾”
50 ¾”
60 ¾”
85 ¾”
25 - 30 - 50
VTNC
VTNC
IN
V2
V1
OUT
II.2.5.3 Creating the Water Siphon
The condensation drainage system must include a suitable siphon to
prevent odours from infiltrating the room. Instructions on how to create
a water siphon are given below.
60 - 85
V2
IN
V1
OUT
50 mm
100 mm
II.2.5.2
IN Water inlet
OUT Water outlet
V1 Air bleed valve
V2 Drainage valve
Creating the Water Drain
For regular condensation drainage, the drain pipe must be tilted
downwards by 2%, with no bottlenecks. There should also be a siphon,
with access for inspection, at least 50 mm down in order to prevent bad
smells entering the environment.
VTNC
2%
Always include a cap at the bottom of the siphon for cleaning purposes,
or ensure that it can be quickly disassembled.
II.2.5.4
IMPORTANT!
Position the drain pipe so that it does not place any
mechanical stress on the unit drain connection.
Checks
Once installation has been completed, you will need to:
• Bleed the air out of the circuit.
• Make sure that there are no water leaks.
• Cover the valve (if present) and connection pipes carefully with anticondensation
material of 10 mm thick or install the auxiliary trays.
• Pour water into the condensation collection trays and make sure that
the liquid is drained properly, following its course until it leaves the
condensation drain. If this does not occur, check the angle and look for
any blockages.
50
The water can be drained at a maximum of 250 mm above the unit, as
long as the upwards stretch of pipe is vertical and positioned in
correspondence to the drain flange. To drain the water at a height
above the permitted 250 mm, install an auxiliary condensation drain
pump (KMC) with collection tray and level regulator. We recommend
models with a safety float to stop the water flow in the cause of pump
malfunction.
43