Condensate Discharge; Appliance Siphonic Condensate Trap; Condensate Pipe Work - Bosch Worcester Greenstar 8000 Series Installation And Maintenance Instructions Manual

Pre-Installation
exhaust terminal must be positioned at least 1200mm away from
any opening into the building which is sited within the footprint of
the carport.
If the exhaust terminal is extended at least 300mm beyond the
footprint of the carport then the distance from the terminal to an
opening within the carport can be reduced to 600mm.
The exhaust terminal can also be routed though the roof of the
carport providing 25mm clearance is provided around the flue
pipe to any flammable material and that it extends at least 300mm
above the roof.
The air intake must have a minimum 150mm clearance to any
opening in the building in order to ensure the integrity of the
structure is maintained. If the exhaust terminates within the
footprint of the carport then the carport must have at least 2 sides
completely open. If the exhaust terminates at least 300mm
beyond the footprint of the carport then the carport must have at
least one completely open side. The exhaust terminal must be
positioned to ensure that plume will not cause nuisance or
damage to vehicles and that minimum clear distances in front of
the terminal will not be impeded by vehicles.
Note:
▶ Installations in car ports are not recommended.
▶ The flue cannot be lower than 1,000mm from the top of a light well
due to the build up of combustion products.
▶ Dimensions from a flue terminal to a fanned air inlet to be determined
by the ventilation equipment manufacturer.
▶ Plume kits running horizontally must have at least a 3° fall back to the
appliance for proper disposal of condensate, except or the initial
horizontal run from the terminal.
The initial plume kit horizontal run will have at least a 10° fall back to
the appliance, due to the terminal elbow design, for proper disposal
of the condensate.
24
4.5

Condensate discharge

Full details on condensate discharge.
▶ Follow the latest version of BS6798 and HHIC guidance.
For correct installation and trouble free operation of the appliance the
following advice should be followed:
1. To minimize the risk of freezing, wherever possible: the
condensate drain should be installed internally.
2. All condensate pipe work must 'fall' from the appliance by a minimum
of 3° (52mm per metre) to ensure adequate condensate flow.
3. The pipe work route must allow air to be supplied back to the
appliance for correct operation.
4. Connection to a rainwater down pipe must include an air break.
Also:
• The condensate pipe work connected to the condensate drain outlet
on the appliance should have a minimum internal diameter (ID) of
19mm.
• Keep external pipe work as short as possible and do not exceed 3
metres length.
Unless there is no means of routing the pipe internally. Further
precautions against freezing must be taken if external pipe runs
exceed 3m.
• External pipe work should have a minimum internal diameter (ID) of
30mm.
• Minimise the number of bends and connectors.
• Remove burrs after cutting pipe.
• Remove surplus solvent from the interior of the pipe.
• The condensate pipe work shall be run in standard drainpipe
material, e.g. poly(vinyl chloride) (PVC), unplasticized (vinyl
chloride) (PVC-U), acrylonitrilebutadiene.styrene (ABS),
polypropylene (PP) or chlorinated poly(vinyl chloride) (PVC.C).
4.5.1

Appliance siphonic condensate trap

The appliance has a large capacity condensate trap reducing the risk of
condensate discharge pipe work freezing up in prolonged cold
temperatures.
The expanded siphonic operation discharges every 10 to 20 minutes.
Resulting in:
• Increased velocity and flow rate.
• With less frequent siphonic actions per hour, the condensate pipe
work is empty for longer.
• Significantly reducing freezing potential for a 48 hour period at -
15 °C, provided the installation parameters listed below are followed.
4.5.2

Condensate pipe work

NOTICE:
General consideration
▶ Where a new or replacement appliance is being installed, access to
an internal "gravity discharge" point should be one of the factors
considered in determining appliance location.
▶ Condensate pipe connection at the appliance:
The condensate pipe must have a nominally outside diameter of
22mm plastic pipe.
▶ Ensure there are no blockages in the pipe run.
▶ Ensure that the discharge method for the installation can effectively
handle the condensate waste from the appliance.
Greenstar 8000 Style – 6720883855 (2019/01)