Table of Contents
Advertisement
7.3 Flue gas discharge and air supply
7.3.1 General
The Remeha Gas 610 ECO is suitable for both conven-
tional room ventilated or eccentric room sealed opera-
tion.
Room sealed terminals should comply with the Gastec
QA-requirements for vertical outlet constructions.
Any horizontal pipework in the flue gas discharge sys-
tem should slope towards the boiler.
Horizontal pipework in the air supply system should
slope towards the supply opening and may require a
drain point at the low point.
Care should be taken when siting flue exit positions as
a vapour plume will be visible when the boiler is opera-
tional (flue gas temperature will be less than < 77°
resulting in the water vapour condensing out on contact
with the air).
7.3.2 Classification due to discharging flue gases
Classification according to CE:
Type B23: Conventional room ventilated appliance with-
out draft diverter. Air supply from boiler room; flue gas
discharge on roof.
Type C33: Room sealed appliance, connected to com-
bined roof outlet.
Type C43: Room sealed appliance in cascade configu-
ration, connected via two ducts to a common duct sys-
tem serving more than one appliance.
Type C53: Room sealed appliance, connected to sepa-
rate ducts for the air supply and flue gas discharge, ter-
minated in zones of different pressure.
Type C63: Room sealed appliance, supplied without the
terminal or the air supply and flue gas discharge ducts.
Type C83: Boiler with room sealed operation, connected
to separate air supply and flue gas discharge duct, with
flue gas discharge duct always in depression.
Conventional flue or room ventilated installations:
A room-ventilated boiler takes the required combustion
air from the plant room. Combustion air for the boiler
module must be provided to the room/ compartment in
accordance with BS 6644. A table showing the maxi-
mum discharge lengths for the room ventilated version
of the Remeha Gas 610 ECO can be found in section
7.3.6.
Room sealed installations:
It is unnecessary to provide separate combustion air to
the room/compartment as this is supplied direct to the
boiler via the eccentric flue and air inlet system to the
vertical terminal unit (see fig. 09, VRS 350 option avail-
able from Broag).
Additional ventilation will be required to the room/
compartment in accordance with BS 6644 (compartment
ventilation).
Remeha Gas 610 ECO
For installations where supply and discharge points are
in two different pressure zones CLV system please con-
tact Broag Technical Dept. for further details and
Note: The boilers can also be installed on a flue dilu-
tion system, but must incorporate a total flue break to
avoid boiler gas/air ratio controls being affected by the
flue dilution fan pressures. For full details please contact
Broag.
A table showing maximum air supply/ flue gas discharge
lengths for the room sealed version of the Remeha Gas
610 ECO can be found in section 7.3.7.
7.3.3 Connection options
The Remeha Gas 610 ECO is available in a room ven-
tilated and a room sealed version. If the room-sealed
version is used, the 2 grilles must be removed before
installing the optional common air inlet connection.
7.3.4 Inlets/Outlets
For conventional flue systems the flue terminal exit point
should discharge vertically and be c/w a tapered cone
and bird guard. For room sealed options use the Broag
VRS 350 vertical terminal (see fig. 09).
7.3.5 Other requirements
Flue gas discharge materials:
Single wall, rigid: stainless steel, thick-walled aluminium
(to comply with building regulations).
Flexible
: stainless steel (to comply with building
regulations).
Flue gas discharge structure:
The flue gas discharge pipe must have airtight and
watertight joints and connections and should be seam-
less.
Horizontal sections in the flue gas discharge pipe must
slope down towards the boiler (at least 5-cm per meter).
Flue liners:
If flue liners are used they must be manufactured from
stainless steel or flexible plastic (continuous operat-
ing temperature rating of 120°) and be gas and water
tight).
Air supply materials:
Single wall, rigid or flexible: aluminium, stainless steel.
Air supply structure:
The air supply pipe must also be airtight. Horizontal sec-
tions in the air supply must slope away from the boiler
module towards the supply opening and incorporate a
drain connection if the route rises from a lower point that
could flood.
16
advice.
Hide quick links:
Advertisement
Table of Contents
