User manual

Page 18
Condense Water Drain
The condense Water drain is underneath the Boiler at the centre, it has a 3/4” hose attached. Insert the flexible hose
into a tundish or oversized PLASTIC waste, never use copper or steel. A waste trap may be required in the normal
way. Condense water must flow easily away from the boiler. Blockage of the pipe could damage the Boiler and void
the warranty. Additional condense drain points should be added to the flue exhaust , on runs of over 3 mt. Please see
page 6 for information on condensate disposal and condensate pipe runs
Hydraulic Information
See further information on pages 15 to 17
Central Heating
If the system is: 1) old or has had leaks resulting in poor water quality or 2) the system cannot handle 1.5 bar, or
3) if plastic material for the flow and return from the radiators or under floor heating is being used and not oxygen
diffusion proof to DIN standard 4726/4729, a separation between the central heating water of the boiler and the sys-
tem will be required, using a plate heat (see Illustrations on pages 31 & 32) exchanger . This will prevent contamina-
tion of the boiler heat exchanger with magnetite, dirt etc. In the instances 1,2 &3 failure to provide such separation
could void the warranty.
Central Heating circuit
 The S-CB has no pressure relief safety valve. This should be fitted in the flow of the system in close proximity
to the boiler (Boiler side of any valves). See page 19 & 20 & 21
 The S-CB has no internal bypass. Low loss headers must be used (page 32 differs) to allow flow, even when
all system valves are closed. Fit automatic air vents as shown on page 19 & 20 & 21
 To prevent contamination of the S-CB heat exchanger, thoroughly power flush the system prior to first use.
The expansion vessel
Please remember that the capacity of an expansion vessel is chosen or installed to match the capacity of the central
heating system and the static pressure. Fit the expansion vessel in the return of the central heating system (see page
19 & 20 & 21). Expansion vessels and fill units available at extra cost from Strebel Ltd.
Condense clean out trap
SCB BOILER