Cascading; Appliance; Calculation Vgh 299 & 300 (Valid For Parts Supplied By Duravent (M&G)); Terminals Equivalent Feet - Slant/Fin VGH-299-CH Installation And Service Manual

10

CASCADING

Appliance

The 299 & 399 have an internal flue gas valve for an o
system according to the table 10.1.
This device is needed to prevent recirculation of the flue gases. The
500 has no internal flue gas valve and needs to be calculated for a nil
pressure common flue system or a separated flue system.
If separated flue systems cannot be applied, ask a flue gas supplier to
calculate a nil pressure common flue system.
10.1.1 C VGH 299 & 300 (V
ALCULATION
Type of
Number of
boiler
appliances
VGH 299 3
4
5
6
VGH 399 3
4
5
6
Table 10-1
Remark 1: Dn 150/200 means: the diameter of the horizontal collector including the bend = 150 mm and after
the bend the diameter of the vertical section is 200 mm with an adaptor of 150->200 mm
Remark 2: Length between shaft and last collector (no. A) = 3.3 ft (1 m).
Remark 3: For calculating other lengths between the last collector and the bend, the length of the vertical
height must be reduced by the number of length and for bends the following table (table 10-2) must be used.
10.1.2 T
ERMINALS EQUIVALENT FEET
Elbow type
45°
90°
Table 10-2
54
verpressure
ALID FOR PARTS SUPPLIED BY
Maximum vertical length in feet (m).
DN150 DN150/200
100 ft (30 m) 100 ft (30 m)
36 ft (11 m) 100 ft (30 m)
100 ft (30 m)
16 ft (5 m)
85 ft (26 m) 100 ft (30 m)
100 ft (30 m)
16 ft (5 m)
Diameter
DN150
5.6 ft (1.7 m)
13.2 ft (4.0 m)
E93.1601EN032.C VGH installation manual
D (M&G)).
URAVENT
DN200 DN200/300
100 ft (30 m) 100 ft (30 m)
100 ft (30 m) 100 ft (30 m)
100 ft (30 m) 100 ft (30 m)
100 ft (30 m) 100 ft (30 m)
100 ft (30 m) 100 ft (30 m)
100 ft (30 m) 100 ft (30 m)
100 ft (30 m) 100 ft (30 m)
100 ft (30 m) 100 ft (30 m)
DN200
12.5 ft (3.8 m)
19 ft (5.8 m)