Rotex GCU compact 315, Installation And Maintenance Instructions Manual

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4 x Set-up and installation
Installation version 4
The ROTEX GCU compact with the SET GCU1 and the LAS
connection line SET H or SET K is connected to the exterior wall
system SET G .
– The combustible air supply from the outside runs through the
ring-shaped gap in the dual pipe, through the outer wall (suc-
tion from below).
– The flue gas discharge to the outside runs through a concen-
tric pipe, through the outer wall and then up to at least 40 cm
over the roof surface. In the external area, the outer air gap
serves as heat insulation for the flue gas pipe.
– Equipment type C
53
Installation version 5
If, for constructional or legal/regulatory reasons, the shaft used
for the flue gas routing is not suited for also routing the com-
bustion air at the same time, the combustion air must be routed
through a separate line.
If the flue gas connection line to the shaft is double-walled and is
surrounded by the combustion air, there are no additional venti-
lation requirements on the installation room.
– Combustion air supply is routed from the outside via the ade-
quately sealed supply line which is connected directly to the
concentric exterior pipe of the connection line. The supply line
should be sized so that the
suction resistance at nominal
output is less than 50 Pa .
– The connection line between the ROTEX GCU compact and
the installation shaft is completely concentric and surrounded
by combustion air.
– Equipment type C
53
, C
83
Installation variant 7 (not shown)
Insofar as the local provisions allow, the GCU compact with
SET W2 ( 15 50 79.12) can be connected with a horizontal
flue gas outlet.
– The combustible air supply and flue gas discharge run
through a concentric dual pipe.
– The combustible air supply runs from the outside through the
outer ring-shaped gap of the dual pipe (supply air inlet via the
intake grille of the wall feed through) and the flue gas dis-
charge to the outside runs through the inner tube.
– Minimum height of the flue gas pipe: 2 m
– Observe local regulations regarding minimum distances of
windows or other building openings.
– Equipment type C
13
4.2.2 Partial ambient air-independent mode
Alternative to installation variant 5
The ROTEX GCU compact is operated with separately routed
supply air/flue gas lines (2-pipe system).
– The combustion air supply from the outside runs through an
adequately sealed air supply line through the external wall.
The supply line should be sized so that the
suction resist-
ance at nominal output is less than 50 Pa .
– Flue gas discharge to the outside runs through the chimney
or an installation shaft. If the connection line between the
ROTEX GCU compact and the installation shaft is single-
walled or not completely surrounded by combustion air, a
ventilation opening to the outside of at least 150 cm
2
is
required.
Appropriate measures must be taken to ensure that the
burner cannot be operated if the ventilation opening is closed.
– The installation shaft where the flue gas line runs must be rear
ventilated. There must be a rear ventilation opening of at least
150 cm
2
in the lower area.
The cross-section of this installation shaft must be sized so
that
between the external wall of the flue gas line and the
internal face of the installation shaft the following mini-
mum distance must be maintained:
– with a rectangular shaft cross-section: 2 cm
– with a round shaft cross-section: 3 cm .
The rear ventilation opening must not be located in rooms
where a negative pressure is generated (e.g. by controlled
apartment ventilation, a tumble-drier etc.).
– Equipment type C
53
, C
83
4.2.3 Ambient air-dependent mode
Installation version 6
The ROTEX GCU compact can also be connected ambient air-
dependent. Thereby, only the inner flue gas pipe (plastic pipe
Ø 60 mm) of the concentric air-flue gas pipe is connected to the
flue gas line. The device sucks the combustible air from the in-
stallation room through the ring-shaped gap of the jacket pipe.
For the flue gas routing to the outdoors, the shaft sizing and the
rear ventilation, the same conditions apply as in chap. 4.2.2. A
ventilation opening to the outside of at least 150 cm
2
is imper-
ative .
– Equipment type B
23
, B
23P
, B
33
, B
53
, B
53P
4.2.4 Additional information on equipment type in
accordance with CEN/TR 1749
C
13
:
– Horizontal openings for flue gas outlet and supply air inlet
– Openings within a square of 50 cm x 50 cm
C
33
:
– vertical openings for flue gas outlet and supply air inlet
– Openings within a square of 50 cm x 50 cm
– Spacing of opening levels < 50 cm
C
43
:
– Connection of more than one piece of equipment to a com-
mon air/flue gas system that is part of the building
– vertical opening for flue gas outlet and supply air inlet
– Openings within a square of 50 cm x 50 cm
– Spacing of opening levels < 50 cm
– Suitable calculated dimensioning verification required
because vacuum prevails in the case of the flue gas inlet into
the common air/flue gas system. The flue gas must be dis-
charged with a natural draught.
– For data on dimensioning calculation, see tab. 15-1.
– Condensate flow from the common air/flue gas system must
not be discharged through the equipment.
If the wall feed through is at a height of less than one
meter above the ground, ROTEX recommends routing
the combustion air through a separate air supply pipe
(mounting height: approx. 2 m).
W8 ZR ,
15 50 79.00 66 or W11 ZR , 15 50 77.00 30
ROTEX basically recommends installing the
GCU compact regardless of the room air (equipment
type C) and with concentric air/flue gas guides (see
chap. 4.2.1). Other permissible applications of the air
intake and flue gas discharge are not described in detail in these
instructions.
Special requirements that exist for such systems based on
EN 15505 are listed below.