Viessmann VIESMANN VITOLIGNO 300-H Technical Manual page 58

Appendix
(cont.)
From the table:
With p = 3 bar, p = 1.5 bar, V
sv 0
V = 250 l (for V max. 1360 l)
n A
8
Selected:
1 x diaphragm expansion vessel N 250 (from Vitoset pricelist)
■ All details relate to a flow temperature of 90 °C.
■ The tables have allowed for a hydraulic seal to DIN 4807-2.
Conversion factor for flow temperatures other than 90 °C
Flow temperature °C
Conversion factor
Divide the vessel size found in accordance with the above tables by the conversion factor.
8.2 General information on low pressure hot water boilers with safety temperatures of up
to 110 °C
The pressure vessel (hot water boiler) is built in accordance with
TRD 702 and must be equipped in line with this directive. Observe the
operating conditions in this directive. Depending on type, the boiler
meets the following standards regarding the stated rated heating out-
put and technical requirements:
■ DIN 4702 or EN 303
■ EN 297
■ EN 483
■ EN 677
(see details on the type plate and in the enclosed documentation).
During installation and commissioning of this solid fuel boiler, observe
all local Building Regulations and regulations concerning combustion
equipment, as well as the following standards, regulations and direc-
tives:
■ DIN 18160-1: Chimneys - Part 1: Design and performance
■ DIN 1988: Drinking water supply systems; general (DVGW code of
practice)
■ DIN 4753: Water heaters and water heating installations for potable
water and for service water
■ EN 12828: Heating systems in buildings – Design of water-based
heating systems
■ EN 13384: Chimneys – Thermal and fluid dynamic calculation meth-
ods
■ TRD 702: Equipment for steam boiler systems with class II hot water
boilers
■ Also observe EN 12953 in the case of:
– Low pressure hot water boilers with safety temperatures > 110 to
120 °C
8.3 Pipe connections
All pipe connections to solid fuel boilers should be made free of load
and torque stress.
8.4 Electrical installation
Carry out the electrical connection and installation in accordance with
VDE regulations (DIN VDE 0100 and DIN VDE 0116), local regulations
and the technical connection requirements laid down by your power
supply utility.
8.5 Operating instructions
According to EN 12828 section 5 and EN 12170/12171, the system
installer must provide operating instructions for the whole system.
VIESMANN
58
= 1153 l
A
50 55 60
3.03 2.50 2.13
Recommendations:
■ Select a sufficiently high safety valve response pressure:
p ≥ p + 1.5 bar
sv 0
■ For circulation pumps, due to the inlet pressure required, select at
least 0.3 bar above the pre-charge pressure even for attic/roofspace
installations: p ≥ 1.5 bar
0
■ Set the water side filling/starting pressure of vented systems in their
cold state at least 0.3 bar above the pre-charge pressure:
p ≥ p + 0.3 bar
F 0
65 70 75
1.82 1.59 1.39 1.24
■ EN 12953-1: Shell boilers – General
■ EN 12953-6: Shell boilers – Requirements for equipment for the
boiler
■ EN 12953-7: Shell boilers – Requirements for firing systems for liq-
uid and gaseous fuels for the boiler
■ EN 12953-8: Shell boilers – Requirements for safeguards against
excessive pressure
■ EN 12953-10: Shell boilers – Requirements for boiler feedwater and
boiler water quality
Use of oil combustion
■ DIN 4755: Oil firing installations
■ DIN 4787-1: Atomising oil burners (in excess of 100 kg/h throughput)
■ DIN 51603-1: Liquid fuels; fuel oil EL, specifications
■ EN 230: Atomising oil burners in a monobloc design – Equipment
for safety, monitoring and control, as well as safety times
■ EN 267: Forced draught burners for liquid fuels
■ TRD 411: Oil combustion for steam boilers (where applicable).
Use of gas combustion
■ EN 298: Automatic gas burner control systems for gas burners and
gas burning appliances with or without fans
■ EN 676: Forced draught burners for gaseous fuels
■ DVGW Code of Practice G 260/I and II: Technical rules for gas
quality
■ DVGW-TRGI 2008: Technical rules for gas installations
■ TRD 412: Gas combustion for steam boilers (where applicable)
■ TRF 1996: Technical rules for LPG
■ DIN VDE 0100: Erection of power installations with rated voltages
below 1000 V
■ DIN VDE 0116: Electrical equipment for combustion systems
80 85 90
1.11 1.00 0.90
VITOLIGNO 300-H
95 100
0.82