Kalvis K-2-70, Installation And Maintenance Manual

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KALVIS - 2 - 70 EN 2022.08.22
3. Main technical data
Table 1.
Boiler model K-2-70
Nominal power (Q
N
) *
1
kW 70
Heated area
class B buildings *
2
m
2
602...1470
class C buildings *
2
322...770
Fuel consumed logs *
3
Size of logs L x Ø, up to cm L50 x Ø15
Position of logs in furnace
lengthwise or
crosswise
Fuel loading openings size:
in front mm 310 x 540
on top mm 310 x 540
Furnace volume dm
3
(l) 467
Fuel charge combustion duration (Q
N
) *
4
hrs 4
Efficiency rate during operation at nominal power, no less than % 82
Boiler class under EN 303-5 2
Boiler water capacity l 198
Recommended min volume of accumulation vessel *
5
l 1260
Water pressure in boiler, no more than bar (MPa) 1,5 (0,15)
Max permissible water temperature
for opened heating system
ºC
95
for closed heating system *
5
80
Min return water temperature during operation ºC 60
Hydraulic resistance mbar 8,5
Operating ambient temperature ºC 3 ... 40
Temperature regulator adjustment range ºC 65 ... 90
Adapted cooling coil type *
6
AAG17
Cold water used for excessive heat
dissipation parameters: *
6
(*
7
)
pressure bar
≤ 0,2
temperature ºC
≥ 15
Required smoke draught from the boiler
no less than
Pa
35
no more than 40
Exhausted flue temperature at nominal output, up to ºC 203
Exhausted flue quantity at nominal output kg/s 0,058
Connection sockets dimensions:
flue channel mm Ø250
heating system in G2-B
drainage in G½
Overall dimensions (netto/brutto),
not bigger than
height mm 1660 / 1863
width mm 985 / 940
length mm 1675 / 1720
Mass (netto/brutto), no more than (

10%) kg 1041 / 1066
*
1
Firing with 18 – 20 % damp birch firewood. It is not recommended to fire with firewood damper than 25 %.
*
2
According to STR 2.01.02:2016 Energy Performance Projecting And Certification Of Buildings requirements
calculated amount of energy expressed for class B and C energy performance buildings.
*
3
As alternative fuel may be used coal, lump wood waste, chip or peat briquettes.
*
4
Fuel charge combustion duration depends on fuel type, moisture, outdoor temperature and other factors.
*
5
It is not recommended in the opened heating system to mount boiler with accumulation tank. Intensive boiler stoking
at 80 °C will cause the water inside of the boiler boiling, will appear the stranger noises.
*
6 For the boiler with installed emergency cooling system
.
*
7
Available for installation having purchased separately (manufacturer UAB "Kalvis").
4. Design description
Note: Since boiler construction is under constant improvement, non-essential
deviations from this manual are possible.