DORCHESTER DR-RS 105, Инструкция по установке, наладке и обслуживанию

Страница: 30 / 64

Installation
30 Instruction manual DR-RS
3
is
3.9.3 Fitting flue gas discharge and air supply for DR-RS 85 and 105
The air supply duct
a
and flue gas discharge duct
b
of the DR-RS 85 and 105
emerge separately from the top box, as shown in Figure 3.7 . They must be
connected to the concentric wall flue terminal (see Figure 3.8 ) or roof flue
terminal (see Figure 3.9 ) via a transition piece.
n
Remark
Hamworthy prescribes the use of a roof or wall-mounted concentric terminal,
of a type approved for the water heater. See paragraphs
3.9.3.1 Concentric
wall flue terminal for DR-RS 85 and 105 and 3.9.3.2 Concentric roof flue
terminal for DR-RS 85 and 105 . Use of an incorrect roof or wall-mounted
terminal can cause the installation to malfunction.
The following requirements must also be fulfilled:
•
The maximum chimney length allowed (A+B+C) is 7 metres.
• The maximum number of 45° or 90° bends allowed is 2.
• If you make use of horizontal piping, then this must slope towards the water
heater with a minimum of 5 mm per metre running length!
• The transition piece, to convert the air supply and flue gas discharge from
parallel to concentric, must be placed immediately before the roof or wall flue
terminal.
• The duct length of the air supply must be approximately the same as that of
the flue gas discharge chimney.
• Make sure that the chimney discharges into an area where this is permitted
for this category of water heater.
See Figure 3.8 Wall flue terminal and Figure 3.9 Roof flue terminal for example
installations.
Figure 3.7 Parallel connections on DR-RS 85 and 105
IMD-0252
a
air supply
b
flue gas discharge
a
b