27
9.4.1 Check the water circuit
FHL1
FHL2
FHLn
----
----
9.4 Water piping
All piping lengths and distances have been taken into consideration.
Valve
Requirements
Thermistor cable length minus 2m
The maximum allowed thermistor cable length is 20m. This is the maximum
allowable distance between the domestic hot water tank and the unit (only for
installations with a domestic hot water tank).The thermistor cable supplied with
the domestic hot water tank is 10m in length.In order to optimize efficiency we
recommend installing the 3-way valve and the domestic hot water tank as close
as possible to the unit.
8.1
8.2
2 3
6
7
8
9
10
11
17
4
The units are equipped with a water inlet and outlet for connection to a water circuit.
The units should only be connected to closed water circuits. Connection to an open water circuit would lead to excessive
corrosion of the water piping. Only materials complying with all applicable legislation should be used.
Example
:
If the installation is equipped with a domestic hot water tank (field supply), please refer to the domestic hot water tank
Installation And Owner's Manual. If there is no glycol (anti-freeze) in the system there is a power supply or pump failure,
drain the system (as shown in the figure below).
NOTE
If water is not removed from the system in freezing weather when unit is not used. The frozen water may damage the
water circle parts.
NOTE
1
1.5
1.4
1.2
1.3
1.7
1.6
1.1
28
The maximum water pressure ≤ 3 bar.
The maximum water temperature ≤ 70°C according to safety device setting.
Always use materials that are compatible with the water used in the system and with the materials used in the unit.
Ensure that components installed in the field piping can withstand the water pressure and temperature.
Drain taps must be provided at all low points of the system to permit complete drainage of the circuit during maintenance.
Air
vents
must
be
provided
at all
high
points
of
the
system.
The
vents
should
be
located
at
points
that are
easily
accessible
for
service.
An
automatic
air
purge
is
provided
inside
the
unit.
Check
that this air
purge
valve
is
not
tightened
so
that
automat
-
ic release of air in the water circuit is possible.
Before continuing installation of the unit, check the following:
The
units
are
equipped
with
an
expansion
vessel
(models:
8L) that has a
default
pre-pressure
of
1.0
bar.
To
assure
proper
operation of the unit, the pre-pressure of the expansion vessel might need to be adjusted.
1)
Check
that the
total
water
volume
in
the
installation,
excluding
the
internal
water
volume
of
the
unit,
is at least
40L
.
Refer
to
14 Technical specifications to find the total internal water volume of the unit.
2) Using the table below, determine if the expansion vessel pre- pressure requires adjustment.
3)
Using
the
table
and
instructions
below,
determine
if
the
total
water
volume
in
the
installation
is
below
the maximum
allowed
water volume.
9.4.2 Water volume and expansion vessel pre-pressure checks
≤
7 m
>7 m
Installation
height
difference(*)
W
ater volume
≤
230 L
W
ater volume >230 L
No pre-pressuread justment required.
Expansion vessel of the unit too small for the
installation.
Actions required:
•
Pre-pressure must
be
increased,
calculate
accord
-
ing to
"Calculating
the pre-pressure
of
the
expansion
vessel" belo
w
.
•
Check
if
the water
volume
is
lower
than
maximum
allowed water volume (use graph below)
Actions required:
•
Pre-pressure must
be
increased,
calculate
accord
-
ing to
"Calculating
the pre-pressure
of
the
expansion
vessel" belo
w
.
•
Check
if
the water
volume
is
lower
than
maxi-
mum allowed water volume (use graph below)
*
Height
difference
is
between
the
highest
point
of
the water
circuit
and
the
outdoor
unit's
expansion
tank.
Unless
the
unit
is
located at the highest point of the system, in which case the installation height differnce is considered to be zero.
Calculating the pre-pressure of the expansion vessel
The pre-pressure
(Pg)
to
be
set
depends
on
the maximum
installation
height
difference
(H)
and
is
calculated
as
follows:
Pg(bar)=(H(m)/10+0.3) bar
Checking the maximum allowed water volume
To determine the maximum allowed water volume in the entire circuit, proceed as follows:
NOTE
In most applications this minimum water volume will be satisfactory.
In critical processes or in rooms with a high heat load though, extra water might be required.
When
circulation
in
each
space
heating
loop
is
controlled
by
remotely
controlled
valves,
it is
important
that this
minimum water volume is kept even if all the valves are closed.
111
110
Содержание MONO KHC-22RX3
Страница 1: ...INSTRUKCJA INSTALACYJNA INSTALATIONMANUAL POMPA CIEPŁA MONO MONO TYPE HEAT PUMP PL EN ...
Страница 2: ......
Страница 79: ...79 ...
Страница 80: ......
Страница 157: ...NOTE 157 ...
Страница 158: ...NOTE ...
Страница 159: ...16125300002403 V C ...
Страница 160: ...kaisai com ...