Heat Exchanger Recognition Set For Gas Condensing Boilers - Buderus Logamax plus GB162 Technical Manual

8.5

Heat exchanger recognition set for gas condensing boilers

(WMS 1)
RH
220
2)
AS HKV DN25
Fig. 89 Dimensions of heat exchanger recognition with
integral heating circuit pump (dim. in mm)
FK Flow temperature sensor
FE Drain & fill valve
MAG Diaphragm expansion vessel
RH Non-return valve
RK Boiler return
VH Heating circuit flow
VK Boiler flow
1)
Install the MAG on site
2)
Adaptor from G1¼ to R1 (order as an accessory)
Use in underfloor heating systems with pipes permeable
to oxygen or in systems where antifreeze is to be used in
specific heating circuits.
The heating circuit downstream of the heat exchanger is
protected by a safety set.
Size the MAG on site in accordance with DIN 4807 and
DIN-EN 12828.
Maximum transfer capacity of the system
separation for heating circuits with DT = 10 K and
200 mbar pressure drop:
HS 25/4 E plus 8.5 kW
HS 25/6 E plus 15 kW
HSM15 E plus 7 kW
HSM 20 E plus 15 kW
HSM 25 E plus 15 kW
6 720 645 821 (2010/09) – Logamax plus GB162
290
VH
RH
HS 20/25
400
VH
FK
MAG
FE
130
VK
RK
6 720 641 280-38.1il
Δp [mbar]
1000
500
100
10
1)
1
100
Fig. 90 Pressure drop curve of the heat exchanger
Δp
Pressure drop
m Mass flow
The pipe assembly for system separation comprises a
copper-soldered stainless steel heat exchanger, a 2.5 bar
safety valve, a pressure gauge, a drain & fill valve and a
G¾ connection for the on-site diaphragm expansion
vessel.
The insulation of the low loss header across is used as
thermal insulation.
Installation
500 1000 3000
m [kg/h]
6 720 641 280-41.1il
8
103