3
Natural Gas and Propane versions
Appliance
VBX30
VBX18
Total weight (full)
kg
38.1
32.6
Total weight (empty)
kg
36.1
31.3
Max lift weight
kg
28.1
24.7
Total water capacity
l
2.0
1.3
Electrical supply
230V 50Hz Fuse at 3A
Internal fuse
T4H 4A 250V
Maximum power consumption
W
110
IP Rating
XXXX
Flue gas temperature Nat Gas 80/60(Propane)
°C
73 (76)
74 (72)
Flue gas temperature Nat Gas 50/30
41
43
CO
2
value max rate (Nat Gas)
%
9.2 ± 0.3 case on
9.0 ± 0.2 case off
CO
2
value min rate (Nat Gas) ref only
%
8.9 ± 0.1
8.4 ± 0.1
CO value max rate (Nat Gas)
%
0.01 ± 0.005
CO
2
value max rate (Propane)
%
10.7 ± 0.3 case on
10.5 ± 0.2 case off
CO
2
value min rate (Propane) ref only
%
10.0± 0.1
9.7 ± 0.1
CO value max rate (Propane)
%
0.019 ± 0.005
Flue products mass flow rate (Nat Gas)
g/s
13.7
8.3
Flue products mass flow rate (Propane)
g/s
13.7
8.3
Gas Valve Offset @ min rate
Pa
-3.0
Connections
Gas
15 mm compression
CH flow
22 mm tail
CH return
22 mm tail
Condensate Drain
21.5 - 22 mm plastic overflow pipe
2.3
GENERAL SPECIFICATIONS
34
Refer to Figure 49.
Key
G C Part No.
Description
No off
Makers Pt No.
1
Ignition Electrode
500680
2
Detection Electrode
500681
3
Spark Generator Unit
500665
4
Gas Control Valve
500655
5
Fan Assembly
601015
6a
Burner VBX 30/SBX 30
700602
6b
Burner VBX 18/CBX 24
700600
7a
Heat Exchanger (VBX 30)
451033
7b
Heat Exchanger (VBX 18)
451034
8
Water Temperature Sensor
500661
9
Flue Sensor
500660
10
Manual Bleed Valve
300730
11
Control PCB
988491
12
User Interface
988492
Heat Exchanger Seal Kit
988489
SHORT PARTS LIST
10
49
1
2
3
4
5
6
7
8
9
10
11
12
