52
Valve regulating diagram valve
To prevent problems from occurring when the machine is started with very cold water, you are strongly advised to install a mixer valve
as shown in the diagram.
The valve must be regulated to suit the temperature at which the water flows into the desuperheater (see diagram): the graph on the
right shows the type of adjustment to use.
Water connections must be performed carefully as for the evaporator (filter, circuit washing, etc.)
Perform all necessary interventions to avoid RISK OF FREEZING (tubes insulation, emptying of circuit, addition of glycol, anti-freeze
resistances).
Water temperature can reach high temperatures (up to 100°C for VD unit, up to 65°C for VR unit), therefore:
• avoid RISK OF BURNS by adopting the necessary precautions (insulations of tubes, temperature detecting station on water if the
sanitary use is foreseen, etc.).
• install safety valves and specifically dimensioned expansion tanks in the hydraulic circuit.
HYDRAULIC CONNECTIONS
Piping connection with Victaulic couplings and water flow switch
to be wel-
ded/thread
WATER FLOW
SWITCH
Air vent and water drain
On the piping circuit feeding the unit, especially when equipped with the Victaulic connection kit, the installer must fit an appropriate
number of valves (manual or automatic) at the top of the circuit in order to vent any air in the piping system. In the same way, he
must install a water drain valve in order, when necessary, to drain the unit’s plate exchanger completely (especially during the winter
in order to prevent freezing that would seriously jeopardize the operation of the unit). For units with the complete pipe kit there is an
air vent valve on the top pipe (water inlet) and a water drain valve on the bottom pipe (water outlet). See “Accessories and options”
section.
Q
A
Q
AB=
30°c
0
35°c
Q
B
100%
PORTATA
ACQUA
Temperatura
INGRESSO Recupero
WATER FLOW
RATE
Recovery INLET
temperature
VICTAULIC
A
B
It is composed of two Victaulic type quick couplers (Fig. 1-A) comprehensive
of union (Fig. 1-B) and seal not installed (supplied with the unit). The unions
are supplied to be welded on the end. Here we give the instructions to follow
for installing the quick couplers.
Do not weld the pipe with Victaulic connection joint attacked since the gasket
may be damaged irreparably.
Note:
Supplied as optional (s
ee “ACCESSORIES AND OPTIONAL EQUIPMENT “)
.
Содержание RHA series
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