Fitting The Appliance - Worcester GREENSTAR HE combi Series Installation And Servicing Instructions

Condensate Termination and Route
The condensate connection on the Greenstar appli-
ances is in 22 mm plastic. The pipe should be extended
and run away from the appliance with a constant fall of
2.5 ° or 40 mm in every metre.
The condensate pipe can terminate into any of four
areas:
Boiler
Ø 22 min.
Sink
Siphon
No length
75 min. trap
restriction
The gradient of the discharge pipe
Open end of pipe direct
should be 2.5° (40 mm/m) minimum
into gully, below ground
but above water level
An internal waste system
Boiler
Internal soil
and vent stack
Ø 22 min.
No length
75 min. trap
restriction
The gradient of the discharge pipe Invert
should be 2.5° (40 mm/m) minimum
The rainwater system
Fig. 11
Whilst all of the above methods are acceptable it is
always the best practice to terminate the condense
pipe via an internal waste system.This will eliminate the
need for any external condensate pipe runs which can
be susceptible to freezing in extreme weather.
Fig. 12 Position of the condensate drain
B Remove the plastic caps from the boiler connec-
tions.
6 720 610 576 GB (03.02)
Boiler
External length of
pipe 2m min.
Siphon
Ø 22 min.
Open end of pipe
direct into gully,
Use waterproof pipe work
below ground but
insulation in very exposed
above water level.
positions
The gradient of the discharge pipe should be
2.5° (40 mm/m) minimum
An external waste system
Boiler
No length
Sink
restriction
Siphon
Open end of pipe
direct into gully,
Ø 22 min.
75 min. trap
below ground but
above water level
The gradient of the discharge pipe
should be 2.5° (40 mm/m) minimum
An external purpose made soakaway
6 720 610 596 -03.1O
6 720 610 602 - 03.1O
External condensate pipework
All Greenstar condensing boilers have within a
syphonic condensate trap. Rather than the condensate
constantly dripping into the discharge pipe, the con-
densate is collected into a trap which releases it in
100 ml quantities.
This will help prevent freezing occurring.
If there is no alternative and the condensate pipe has to
be externally run, the following should be considered:
• The pipe run should take the shortest practical route.
• The pipework should be insulated with weather
resistant insulation.
• The pipe should terminate as close as possible to the
ground or drain, whilst still allowing the condensate
to safely disperse.This would prevent wind blowing
up the pipe.
• The pipework should be installed with the minimum
of horizontal runs and with a downward slope of at
least 2.5 °.
3.7

Fitting the appliance

Benchmark: For optimum perform-
ance after installation, this boiler and its
associated central heating system must
be flushed in accordance with the
guidelines given in BS5793:1992
"Treatment of water in domestic hot wa-
ter central heating systems".
B Remove packing, taking care to observe the instruc-
tions on the packing.
B Lie the boiler on its back.
Removing the outer case
The outer case is secured against unau-
i
thorised removal by two clips (electrical
safety).
Always secure the outer case with those
clips again after refitting.
B Turn the clips with a screwdriver (1.).
B Slide the outer case upwards and then forwards to
remove (2.).
Installation
15