Selection Of Gas Valve Assembly - elco VECTRON G 03.200 DUO Betriebsanleitung

Overview

Selection of gas valve assembly

Selection of gas-valve assembly
The gas-pressure loss indicated in the
table is to be added to the furnace
pressure reading (in mbar).
Burner power
G 03.200 DUO
Burner MBZRDLE 407
power
Nat. gas E Hi = 10.365 kWh/m
(kW)
105
135
G 03.240
165
DUO
180
195
210
225
240
Burner MBZRDLE 407
power
Nat. gas E Hi = 10.365 kWh/m
(kW)
100
140
G 03.300
180
DUO
220
240
260
280
300
Example (for burner G 03.300 DUO):
· Specifications:
Type of gas supply: Natural gas E
–
Gas flow pressure: 20 mbar (note: at inlet of gas valve assembly)
–
Required burner power: 240 kW
–
Furnace pressure at rated boiler load: 2.5 mbar
–
· Condition: Operating point must lie within the permitted operating range of the burner.
· Selected gas valve assembly: MZRDLE 412
· Testing of selection:
– Gas pressure loss (from table): 12 mbar
– Furnace pressure:
Total
Given: Gas flow pressure 20 mbar >14.5 mbar ð Selection MBZRDLE 412 correct.
–
IMPORTANT:
The gas-flow pressure determined is to
be maintained at the inlet of the
gas-valve assembly. When determining
the gas-flow pressure required at the
transfer point, remember to take into
account the resistance of the burner
feed-conduit and its fittings (ball valve,
TAS, additional filter or meter).
Nat.gas E Hi = 10.365 kWh/m
(kW)
100 5
120 7
140 10
160 13
170 15
180 16
190 18
200 20
MBZRDLE 412
3
Gas pressure loss (from entry of gas valve assembly)
7 4
12 6
18 9
21 11
25 13
29 15
33 17
38 20
MBZRDLE 412
3
Gas pressure loss (from entry of
5 2
9 4
15 7
23 10
27 12
32 15
37 17
43 19
2.5 mbar
14.5 mbar
03/2005 - Art. Nr. 13 018 069A
MBZRDLE 407 B01 S20
3
Nat.gas LL Hi = 8.83 kWh/m
Gas pressure loss (from entry of
7
10
14
18
20
23
25
28
MBZRDLE 407 MBZRDLE 412
Nat.gas LL Hi = 8.83 kWh/m
8
12
19 10
22 12
26 14
30 16
35 18
39 20
MBZRDLE 407 MBZRDLE 412
Nat.gas LL Hi = 8.83 kWh/m
gas-valve assembly)
6
13
21 10
31 14
37 17
20
23
27
3
Propane gas Hi=25.89kWh/m³
gas valve assembly)
4
6
8
10
12
13
15
16
MBZRDLE 407
3
Propane gas Hi=25.89kWh/m³
4 4
6 6
9
11
13
15
17
19
MBZRDLE 407
3
Propane gas Hi=25.89kWh/m³
3 2
6 4
7
11
13
15
18
20
EN
21