Thermona Therm 28 KD, Руководство по установке

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7
V
c
= V .
∆
v
. 1.3
V
c
expansion volume (m
3
)
V water volume in the heating system (m
3
)
∆
v
relative increase of water volume at the increased temperature t
m
(if t
m
= 80
o
C then
∆
v
= 0.029)
The calculated expansion volume is the smallest volume. If the calculated expansion volume is higher than the
volume of the expansion vessel in the boiler it is necessary to install another expansion vessel in the system.
♦
CONDENSED FLUID DRAIN
The boiler is equipped with a siphon trap that must be filled with circa 100 ml of water before the boiler is put
into operation. The exhaust pipe must be installed with a falling gradient of minimum 5° from the boiler to the
drainage it must not be in any way clogged (the clogging of the condensed water drain leads to resonation in the
combustion chamber of the boiler).
Analysis of the condensed fluid:
indicator Unit Value
PH - 3
Nitrites mg.l
-1
0.01
Copper(Cu) mg.l
-1
0.2
Lead (Pb) mg.l
-1
0.01
Cadmium (Cd) mg.l
-1
0.004
Zinc (Zn) mg.l
-1
0.12
♦
BOILER CONNECTION TO DOMESTIC HOT WATER SYSTEM (DHW)
The connection of the domestic water inlet must be done according to relevant norms and standards, with all the
necessary armatures. The quality of water circulating in the DHW system is critical for the prevention of
incrustation being created in the heat exchanger. Therefore it is crucial that the water meets the relevant quality
norms, mainly as far as water hardness is concerned (the sum of material concentrations of calcium and magnesium
< 2.5 mmol/l). If you have doubts or insecure parameters (e.g. if the users have their own well), we recommend
using automatic water modification equipment.
♦
BOILER CONNECTION TO GAS
The boiler must always be connected to gas by a professional company with valid certification and its
professional certified employees and according to the approved documentation for gas fitting. The gas regulator is
not to be fitted in front of the boiler, as it is inbuilt in the gas armature, which is a part of the boiler. A round gas
cock with a certificate for gas must be fitted to the boiler’s gas inlet. The gas cock must be freely accessible.
The boiler is designed for natural gas with 9 to 10.5 kWh/m
3
heating power and 20 mbar nominal pressure in the
distribution net and for propane with 37 mbar nominal pressure in the distribution net.
Important:
If you change the boiler to another gas type it is necessary to change the gas screen, too. This is situated at the
screwed fitting between the gas outlet from the gas fitting and the mixer. Further, it is necessary to check, or where
applicable, to reset the corresponding parameters concerning the synchronous mixing on the gas fitting. The values
to be set are the amount of CO
2
contained in the flue ranging from minimum to maximum boiler output depending
on the flue analyser.
The change and resetting can only be carried out by a trained service worker certified by the manufacturer.
After the control elements are reset they have to be secured against unauthorized manipulation. The manufacturer
is not liable for any damages resulting from unauthorised setting
.
♦
BOILER CONNECTION TO SUPPLY MAINS
The boilers are equipped with a triplex flexible cable with a plug. They are to be plugged in the socket nearby so
that the plug is accessible even after the boiler is mounted. The installation of the socket must comply with the
local valid norms, with the protection pin at the top and the central or neutral connected on the right from the front
view. The mains voltage must be 230 V ± 10 %. The socket installation, the connection of the room thermostat,