DORCHESTER DR-FC 120, Installation, Comissioning And Maintenance Instructions

Page: 33 / 100

Instruction manual DR-FC 31
is
Concentric roof flue terminal specifications C33
3.9.4 Parallel connections
The table states the maximum pipe lengths for parallel systems. The maximum
pipe length depends on the chosen diameter.
Warning
Install flue gas discharge pipe runs with a run-off of 5 mm per metre towards
the water heater.
Chimney flue requirements for parallel systems
You must use the longest pipe when calculating the pipe length. For example, if
the chimney pipe is 10 metres and the air supply pipe is 8 metres, use 10 metres
as the length for the calculation. Next, add the L
equivalent
for every 90° and 45°
bend to this 10 metres, in both the air supply and flue gas outlet. The following
practical example illustrates how to use the table.
Subject Description
Roof flue terminal set:
•
1x Roof flue terminal
(incl. clamping
ring)
• 1x Pipe 1000 mm
• 1x Roofplate
Art. No. DR-FC 25, 30, 45, 60
532702155
1
DR-FC 80, 95, 120
532702158
1
Manufacturer Muelink & Grol
Model M2000 DDV HR-C
Pipe material Construction Concentric
Flue gas
discharge
Thick-walled aluminium with lipped sealing ring.
Air supply Thin-walled galvanised sheet steel.
Pipe diameters Flue gas
discharge
DR-FC 25, 30, 45, 60 Ø 100 mm
DR-FC 80, 95, 120 Ø 130 mm
Air supply DR-FC 25, 30, 45, 60 Ø 150 mm
DR-FC 80, 95, 120 Ø 200 mm
(1) No other roof flue terminal may be used. Use this item number to order the roof flue terminal set from the
supplier , manufacturer or wholesalor.
Water heater Diameter
1
Maximum
total length L
equivalent
90° bend
L
equivalent
45° bend
DR-FC 25, 30, 45,
60
100 mm 55 m 4.6 m 1.2 m
DR-FC 80, 95, 120 130 mm 65 m 2.4 m 1.4 m
DR-FC 25, 30, 45,
60
130 mm 100 m 2.4 m 1.4 m
DR-FC 80, 95, 120 150 mm 100 m 2.6 m 1.6 m
(1)
Parallel systems with diameters of 100
or
130 mm. If the maximum total
length for a diameter of 100 mm is insufficient, 130 mm diameter should be
used. If the maximum total length for a diameter of 130 mm is insufficient,
150
mm diameter should be used. Any diameter enlargement must be carried
out
on both air supply and flue gas discharge.