4
Set-up and installation
Installation and operating instructions
17
Gas Combi Unit
Floor-standing gas condensing boiler with integrated heat storage
008.1543899_02 – 04/2019 – EN
GCU compact 5xx
Fig. 4-5
Connection dimensions GCU compact 5xx (view from
the back)
For legend of position numbers, see
Fig. 4-6
Connection dimensions GCU compact 5xx (top view)
For legend of position numbers, see
A
Front side
B
Rear side
INFORMATION
To avoid increased cooling losses, we recommend the in-
stallation of
SKB
gravity brakes or the syphoning (connect-
ing lines leading directly downwards) of the drinking water
connection.
4.2
Different set-ups
Fig. 4-7
Installation variants for the GCU compact
1-6
Installation variant (for a description, see
to
CA
Supply air (combustion air)
FG
Flue gas
RV
Rear ventilation
a
Installation variant for ambient air-independent operation
(flue gas/supply air concentric)
b
Installation variant for conditional ambient air-independent
operation (separate flue gas/supply air)
c
Installation variant for ambient air-dependent mode
d
Longitudinally ventilated shaft with a fire-resistance period
of 90 minutes (30 minutes in low height residential build-
ings). Observe country-specific regulations for fire-resist-
ance periods.
e
Ventilation opening (1×150 cm
2
or 2×75 cm²)
f
Rear ventilation opening (150 cm
2
)
The GCU compact are designed basically for the
ambient air inde-
pendent
operation. They are fitted with a concentric flue gas /air
supply pipe DN 60/100 as standard.
The
SET GCU1
kit can be used to flexibly arrange the flue gas /air
supply line for the connection directions to the rear, to the side or up-
wards and extended to DN 80/125.
Summary of Contents for GCU compact Series
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