14
TECHNICAL PASSPORT. INSTALLATION and OPERATION MANUAL
TECHNICAL PASSPORT. INSTALLATION and OPERATION MANUAL
TECHNICAL PASSPORT. INSTALLATION and OPERATION MANUAL
TECHNICAL PASSPORT. INSTALLATION and OPERATION MANUAL
In areas with heavy snowfalls it is
recommended to further strengthen the
collector support fixation to the building
structure, as well as frequent inspection
to prevent any loosening of connections.
•
Collector protection against frost
.
To protect the collector against frost
(closed loop)
Propylene Glycol PG
heat-
carrier fluid is recommended.
Table 5
Relation between Propylene Glycol and wa-
ter
PG
/ Propylene
Glycol /:
Water
Freezing point
20% : 80%
-
7
℃
30% : 70%
-
13
℃
40% : 60%
-
23
℃
50% : 50%
-
34
℃
If you choose water as heat carrier, it is
recommended to connect to the system
a controller unit supporting antifreeze
function working with water as heat-
carrier.
•
Collector protection against
overheating
.
If the system is designed to
power a central heating circuit it would
produce more hot water than necessary
in the summer period. In this case, we
recommend that the system be fitted with
a device for heat dissipation or to add
more users to the hot water circuit in the
summer (swimming pool or other similar
consumers).
7.2.
Collector outlets/connections
Upon design of vertical risers it is
recommended that the heat carrier flow
speed
be between 0.5 and 0,8 m/s, and the riser
pipes be made of copper.
For example: for 20 m
2
of collector area
the required flow rate is 1000 l/h at a heat
carrier speed of 0,5 m/s - recommended
pipe section is ø28x1 Cu.
We recommend - two and/or more
collector fields to be connected using the
Tichelmann principle.
When installing the collector it is
mandatory that on its highest point
an automatic air purge be installed to
facilitate system charging.
Connection of collectors is carried out
using Hollander joints.
Diagram 24
For PK New Line model using adapter
nipples for copper pipe ø22.
For PK Classic model using Hollander
joints at 1/2“
The use of galvanized pipes and fittings
for connecting collectors to water tanks
is forbidden due to electrical corrosion
hazard.
