Frico Thermozone AG 4000 W Serie Manual Del Usuario página 22

GB
Water control
VR20/25, set of valves
Used to control the water supply to water
heated units.
The valve set consists of the following:
• AV20/25, stop valve
• JVF20/25, adjustment valve
• TRV20/25, 3-way control valve
• BPV10, bypass valve
• SD20, actuator on/off 230V~ (soft close)
The Stop valve (AV20/25) consists of a ball
valve which is either open or closed and is
used to shut off the flow, when servicing for
example. The adjustment valve can be used
to finely adjust or shut off the water flow
manually. The adjusted water flow can be
read directly off the valve. JVF20 has a kv
value of 3.5 and JVF25 has a kv value of 5.5.
If the three way valve (TRV20/25) is closed,
a low flow passes through the by-pass valve
(BPV10) so that there is always warm water
in the water coil. This is to provide quick
heat supply when a door is opened but also to
provide a degree of frost protection. Actuator
(SD20) controls the heat supply on/off. The
valve set has two different sizes in the valves.
VR20 is DN20 (3/4") and VR25 is DN25 (1").
The by-pass valve is DN10 (3/8"). VR20/25 is
supplemented with a suitable thermostat for
control.
22
AG 4000 W
TRV20/25, 2-way control valve
TVV20 is DN20 (3/4") in size and TVV25
is DN25 (1") in size. Pressure class PN16.
Maximum Pressure 2 MPa (20 bar).
Maximum pressure drop TVV20: 100 kPa (0.1
bar)
Maximum pressure drop TVV25: 62 kPa
(0.062 bar)
The Kv value can be set to three positions:
Pos 1
TVV20 kv 1.6
TVV25 kv 2.5
SD20, actuator
on/off 230V~ (soft close)
For control of the water supply. Works on/off.
A 5 second cycle of opening and closing of the
valve prevents sudden pressure changes in
the pipe system. Protection class: IP40.
TVV20/25 and SD20 give a simplified variant
of water control without being able to adjust
or shut down the water flow. TVV20/25 +
SD20 are supplemented with a suitable
thermostat for control.
JV20/25, adjustment valve
The adjustment valve can be used to finely
adjust or shut off the water flow manually.
Equipped with a pressure outlet to read off
using external instrument. JV20 has a kv
value of 0.13-5.9 and JV25 has a kv value of
0.17-8.52.
TE3434
Flexible hose, length 0.8 metres, for water
connected units (two hoses are required for
each unit) with 3/4" (DN20) external thread
at one end and a connection nut with 3/4"
(DN20) internal thread at the other.
Pos 2 Pos 3
kv 2.5 kv 3.5
kv 4.0 kv 5.5