Operating instructions

Product details | 17
6 720 644 143 (2010/09)
3.11 Specification ZWB 37-2 ...
ZWB 37-2 ...
Unit Natural gas Propane Butane
Max. heat output (P
max
) 40/30 °C kW 32.1 32.1 36.6
Max. heat output (P
max
) 50/30 °C kW 31.8 31.8 36.3
Max. heat output (P
max
) 80/60 °C kW 30.0 30.0 34.2
Max. gas consumption (Q
max
), central heating MJ/h 123.4 123.4 140.5
Min. heat output (P
min
) 40/30 °C kW 10.6 15.7 17.9
Min. heat output (P
min
) 50/30 °C kW 10.5 15.5 17.7
Min. heat output (P
min
) 80/60 °C kW 9.4 13.9 15.9
Min. gas consumption (Q
min
), central heating MJ/h 39.1 57.9 65.9
Max. heat output (P
nW
), DHW kW 37.0 37.0 42.2
Max. gas consumption (Q
nW
), DHW MJ/h 147.7 147.7 168.5
Gas supply rate
Natural gas H (gross heating value 37.8 MJ/m
3
)m
3
/h 3.9 - -
Butane/propane (gross heating value 50 MJ/kg) kg/h -2.93.4
Permissible gas supply pressure
NG kPa 1.1 - 3.0 - -
LPG kPa -2.752.75
Expansion vessel
Pre-charge pressure kPa 75 75 75
Total capacity l 10 10 10
DHW
Max. DHW flow rate l/min 13.0 13.0 13.0
Outlet temperature range °C 40 - 60 40 - 60 40 - 60
Max. cold water inlet temperature °C 60 60 60
Max. permissible water supply pressure kPa 1000 1000 1000
Min. inlet pressure kPa 20 20 20
Specific flow rate acc. to EN 625 (D) l/min 16.9 16.9 16.9
Calculation values for calculating cross-section to EN 13384
Flue gas mass flow rate, max./min. rated g/s 16.2/4.5 15.3/6.5 15.3/6.5
Flue gas temperature 80/60 °C max./min. rated °C 83/58 83/58 83/58
Flue gas temperature 40/30 °C max./min. rated °C 60/35 60/35 60/35
Residual pump head Pa 80 80 80
CO
2
at max. rated output % 9.7 10.8 12.2
CO
2
min. rated output % 9.1 10.2 11.5
Flue gas rating group to G 636/G 635 G
61
/G
62
G
61
/G
62
G
61
/G
62
NO
x
class 555
Condensate
Max. condensate quantity (t
R
= 30 °C) l/h 2.7 2.7 2.7
pH level, approx. 4.8 4.8 4.8
Table 6