Buderus GB162-65, Installation Instructions Manual

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Installation 5
pump group Logamax plus GB162-65/80/100 - Subject to modifications resulting from technical improvements!
8
5.2 Removing the non-return valve (if necessary)
If the system pressure is not sufficient according to
table 3, page 11, you can remove the integrated non-
return valve from single-boiler systems.
Selecting the correct pump group
 Select the correct pump group using table 1.
1) Only remove the non-return valve from the pump group (beneath
the pump) when installing single-boiler systems
2) Do not use a pump group or switch, but select a separate pump
using the installation and servicing instructions with the boiler.
Logamax plus
GB162-65
Logamax plus
GB162-80
Logamax plus
GB162-100
Multi-boiler
system
(cascade
system)
UPER 25-80/
UPS 25-80 pump
group with pump
UPER 25-80/
UPS 25-80 pump
group with pump
UPER 25-80/
UPS 25-80 pump
group with pump
Single-boiler
system with
Buderus
diverter valve
UPER 25-80/
UPS 25-80 pump
group with pump
UPER 25-80/
UPS 25-80 pump
group with pump
UPER 25-80/
UPS 25-80 pump
group with pump
Single-boiler
system without
diverter valve
UPER 25-80/
UPS 25-80 pump
group with pump
1)
UPER 25-80/
UPS 25-80 pump
group with pump
2)
Table 1 Selecting the correct pump group
DAMAGE TO THE UNIT
in cascade systems or in single-boiler
systems with a switch due to the heating
medium flowing back.

Only remove the non-return valve from
the pump group of a single-boiler system
if the residual head (see table 3, page 11
is not sufficient.
Logamax plus
GB162-65
Logamax plus
GB162-80
Logamax plus
GB162-100
Multi-boiler
system (cascade
system)
not allowed not allowed not allowed
Single-boiler
system with
Buderus diverter
valve
not allowed not allowed not allowed
Single-boiler
system without
diverter valve
Check the
residual head
Check the
residual head
not effective,
use pump
Table 2 Removing the non-return valve