Technical data

Procon
. V R
The room or space in which the Procon , ,  &  boiler is installed may need to be ventilated in accord-
ance with BS : Part :, or BS : , as appropriate.
The table below details the ventilation required for individual Procon , ,  &  boiler installations
ONLY.
Conventional Flue Installation H H H H (*)
Room Installation. Natural Ventilation direct
to outside.
cm cm cm
cm High,
cm Low Level
Room Installation. Natural ventilation from
adjacent room, which is directly ventilated to
outside.
cm cm cm N/A
Compartment Installation. Natural Ventilation
direct to outside.
cm High, cm
Low Level
cm High,
cm Low Level
cm High,
cm Low Level
cm High,
cm Low Level
Compartment Installation. Natural ventilation
from adjacent room, which is directly
ventilated to outside.
cm High,
cm Low Level
cm High,
cm Low Level
cm High,
cm Low Level
N/A
Room H H H H (*)
Room Installation. (Consideration shall be
given to provide general ventilation for
cooling purposes).
NIL NIL NIL
cm High & Low
Level
Compartment Installation, room sealed  ue.
Natural ventilation direct to outside.
cm High & Low
Level
cm High & Low
Level
cm High & Low
Level
cm High & Low
Level
Compartment Installation. Natural ventilation
from adjacent room. Adjacent room similarly
ventilated direct to outside
cm High & Low
Level
cm High & Low
Level
cm High & Low
Level
cm High & Low
Level
Important Notice
The Ventilation Requirements detailed above are for guidance purposes and are relevant for single ap-
pliance installations ONLY.
For further information on di erent ventilation options/requirements, for single or multiple boiler instal-
lations, please refer to BS 5440: Part 2:2000 and BS 6644: 2005, as appropriate.
*1 – Consideration shall be given for the Summer Usage of the boiler, and the appropriate ventilational-
lowance applied, as detailed in BS 6644: 2005.
. H S D
The Procon , ,  &  boiler can be operated to serve a heating load as either;
• Constant Temperature, the option of adjusting the desired set-point temperature between  °C and  °C.
• Direct-On-Boiler weather compensated  ow temperature.
• Hot Water Production, on a priority basis.
The Procon , ,  &  boilers are designed to operate
with a °C ∆T, the heating & hot water loads shall be designed
around a °C ∆T, operating the boiler on a reduced ∆T will result
in a reduced boiler output.
Where the system index circuit/s have a greater hydraulic re-
sistance than that of the residual head pressure available from
the internal boiler pump {, , }, or chosen boiler pump {},
then a low loss header must be used, with the boilers pump
delivering the water to the low loss header.
Where multiple boilers are to be installed, a low loss header
must be used, with the boiler primary pumps delivering the wa-
ter to the low loss header. Non-return valves MUST be  tted to
each boiler to prevent short-circuiting. See . System Type .
Where the system has multiple pumped circuits that are pro-
posed to operating at the same time, then sub headers, both  ow
and return, should be used with non-return valve being installed
directly after each pump to prevent re-circulation. See Fig .
Fig .
