Requirements - Worcester Greenstar Condensfit II Installation Instructions Manual

Explanation of symbols and safety instructions
1.3

Requirements

Condensate disposal with the flue system
Extended horizontal flue runs (over the standard flue length) need to
allow for proper disposal of condensate through the flue system back to
the appliance.
▶ All horizontal flue sections must rise by at least 52mm per metre
away from the appliance to ensure that the condensate flows back
into the appliance for safe disposal via the condensate waste pipe.
2,000mm
1,000mm
52mm
Fig. 1 Slope for condensate disposal
▶ Although referred to as 90° elbow they are in fact 93°.
– They have a built in 3° (52mm per metre) rise from the appliance
to help maintain condensate flow back into the appliance for safe
disposal.
Flue and plume management termination positions
The flue termination positions and, if fitted, the plume management
termination positions are covered in the appliance Installation and
maintenance instructions as they are part of the appliance installation
location considerations.
• Ensure the maximum flue length and, if fitted, the plume
management maximum length are not exceeded for the appliance
model, maximum lengths are detailed in the appliance Installation
and maintenance instructions.
Installation
The flue installation must be fitted and terminated in accordance with
your local regulations.
Support
Flues require adequate support throughout their entire run. It is advised
to support the flue at every metre and changes of direction.
Flue System
Only use the approved Condensfit II flue system accessories with this
flue kit.
Replacing an existing flue
When replacing an existing Condensfit II flue on an appliance:
▶ Ensure it is the correct flue system for the appliance as we have a
separate flue system for Wall Hung and Floor Standing gas
appliances.
▶ Ensure the flue installation meets current Building Regulation
requirements.
– Building Regulation requirements may have changed from the
original date of installation of the existing flue system.
4
104mm
0010013472-001
Flue system in voids
Where a flue system is going to be concealed, provision for access must
be made for service and inspection:
▶ Access points for inspection of the flue system must be sufficiently
sized for visual inspection, particularly at any joint in the flue system.
– The access panels must be no less than 300mm square.
– Larger access panels can be considered if the whole flue system
needs to be viewed.
– Any access must not contravene any other building regulations or
fire regulations. Refer to Building Regulations Approved
Documents B, L and E.
▶ Flue joints within the void must not be more than 1.5m from the edge
of the inspection hatch.
▶ Inspection hatches should be located at changes of flue direction.
– If this is not possible, elbows should be viewable from both
directions.
2
4
X
1
X
6
5
X
1
8
X
3
8
Fig. 2 Flues in voids
[X] This dimension must not be more than 1.5 metres.
[1] Inspection hatch
[2] Flue terminal
[3] Concealed flue connection
[4] External wall
[5] Internal wall
[6] Any intervening joints must be visible within 1.5 metres of the
inspection hatch.
[7] Accessible flue connection
Annual inspection
When the flue system is inspected during the annual service, the
engineer must inspect and confirm that:
▶ The flue system is continuous without any breaks.
▶ All joints in the flue system are secure and correctly assembled
according to the manufacturers instructions.
▶ The flue has a fall of 3° (52 millimetres per metre) back to the boiler.
▶ The terminal is not damaged or restricted.
▶ The plume management kit is not damaged (if fitted).
Greenstar Condensfit II – 6 720 874 391 (2019/04)
2
X
1
6
5
X
7
1