Buderus Logamax plus GB162 Technical Manual page 14

2 Technical description
GB162-50/65/80/100
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17
16
15
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GAS VK AKO
Fig. 9 Function scheme Logamax plus
GB162-50/65/80/100
Key to fig. 6 to fig. 9:
AKO Condensate outlet
AW DHW outlet
EK Cold water inlet
GAS Gas connection
RK Boiler return
VK Boiler flow
RS DHW cylinder return
VS DHW cylinder flow
1 Boiler flue connection (flue outlet)
2 Ceramic linear radiant burner
3 Safety temperature sensor
4 ALUplus heat exchanger
5 Return temperature sensor
6 Pressure sensor
7 Modulating high efficiency pump, efficiency category A
8 Logamatic BC10 base controller
9 Universal burner control unit UBA3.5
10 3-way diverter valve
11 Siphon
12 Safety valve
13 Flow temperature sensor
14 Automatic air vent valve
15 Gas valve
16 Venturi nozzle
17 Fan
18 Incandescent ignition and monitoring electrode
19 Sleeve socket for pump installation (UPM 15-70 2W
(accessory) may be integrated)
20 Stratification cylinder (40 l capacity)
21 Cold water inlet sensor
22 DHW temperature sensor
23 Water flow limiter
24 Plate heat exchanger
25 Water flow sensor
26 Cylinder primary pump
27 Drain & fill valve
28 Water flow limiter, adjustable
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ETA-plus system in the Logamax plus GB162
The ETA-plus system of the Logamax plus GB162 gas
1
condensing boilers minimises the overall running costs
through optimum energy utilisation.
2 Part of the ETA-plus system is a highly effective lamellar
tube heat exchanger with ALUplus technology. It features
an extremely large surface area enabling optimum heat
3
transfer (
4
This concept, which has been proven in millions of
applications, has the following effects:
5
• Year-round utilisation of condensing energy because
6
• A maximum standard seasonal efficiency [to DIN] of up
8
In addition, the Logamax plus GB162 gas condensing
boilers are equipped with a fully pre-mixing ceramic linear
9
radiant burner that modulates its output between 17 %
and 100 %. It is fitted as a downdraught burner above the
RK
lamellar tubes (
6 720 642 463-09.1il
The ETA-plus system is rounded off with a modulating
differential pressure-dependent high efficiency pump in
appliances up to 45 kW (pump for GB162-45 available
as an accessory). This enables simple system hydraulics
without minimum flow rates to be achieved (
Hydraulics Logamax plus GB162-50/65/80/100
The Logamax plus GB162-50/65/80/100 gas
condensing boilers are supplied without integral pumps.
They may be combined with the pump connection
assembly (accessory). The pump connection assembly is
equipped with an output-dependent UPER 25-80 pump.
For the GB162-50, an output-dependent UPM 25-70
high efficiency pump is available as an accessory.
Furthermore, these appliances can be combined on site
with third party differential pressure-dependent pumps.
These should be operated with the setting Δp-v (variable).
fig. 6 to fig. 9, pos. 4).
of the extreme cooling of the flue gases
to 110,5 %
fig. 6 to fig. 9, pos. 2).
6 720 645 821 (2010/09) – Logamax plus GB162
chapter 6).