Rooms Containing A Bath Or Shower; Flue Options - Worcester Greenstar Highflow 440CDi ERP Installation, Commissioning And Servicing Instructions

PRE-INSTALLATION
3.6.4

Rooms containing a bath or shower

NOTICE: Any switch or appliance control using mains
electricity must not be within reach of a person using the
bath or shower.
An appliance fitted with a mechanical, RF mechanical timer, or a clip-in
weather compensating controller may be only installed outside the
shaded area.
An appliance fitted with a blanking panel or a timer/programmer
conforming to IP4XD can be installed in zone 2.
An appliance and programmer combination conforming to less than
IP4XD can only be installed outside the shaded area.
BS7671 Amendment 3:2015 requires a 30mA RCD (Residual Current
Device) for installations within this location as well as for any circuits
passing through zone 1 and/or 2 not serving this location.
If the appliance is installed into a cupboard that opens into zone 1 or 2 it
is strongly recommended that a 30mA RCD is fitted to the circuit
supplying the boiler.
Refer to the latest IET wiring regulations.
*
*Radius 600mm
Fig. 15 Bathroom installations
[2*] Without the end wall, zone 2 must extend 600mm from the bath
16
*
*
6720646608-124.4Wo
3.7

Flue options

CAUTION: Non accessible flue systems:
▶ Where a flue system is not going to be accessible,
provision must be made for service and inspection.
▶ Voids containing concealed flues must have at least
one inspection hatch no less than 300mm square.
▶ Flue joints within the void must not be more than 1.5
metres from the edge of the inspection hatch.
▶ Inspection hatches should be located at changes of
direction.
▶ If this is not possible, bends should be viewable from
both directions.
NOTICE: Effective flue lengths of bends:
Each bend used has an equivalent straight flue length
▶ refer to the table below
Effective flue length
Bend 60/100 80/125
45° 0.75m 1m
90° 1.5m 2m
Plume management kits are available for the 60/100
horizontal flue system,
Part number 7 716 191 086.
Refer to the manual supplied with the Plume
Management kits for complete installation instructions
Highflow CDi boilers
FLUE TYPE
1 Telescopic horizontal flue assembly
2 Horizontal flue extension
3 Horizontal flue with 1 x 90° bend
4 Horizontal flue with 2 x 90° bends
5 High level horizontal flue
6 High level horizontal flue with 2 x 90°
bends
7 High level horizontal flue with 3 x 90°
bends
8 Vertical flue assembly
9 Vertical flue with 2 x 90° bends
10 Vertical flue with 2 x 45° bends
Table 9 Flue options
1) Flue is cut to a minimum of 130mm, flue connector adds the additional 10mm.
The flue systems have different maximum flue lengths.
The next page shows various flue options.
Refer to the flue options in table 9 for the straight flue lengths required
to achieve the maximum flue length.
Part number Flue
7 716 191 155 60/100
7 716 191 157 80/125
7 716 191 156 60/100
7 716 191 158 80/125
Table 10 Flue options
Greenstar Highflow CDi
Maximum total flue
length L (mm)
60/100 80/125
1)
140 - 530 350 - 1,200
4,000 13,000
2,000 11,000
N/A 9,000
2,000 11,000
N/A 9,000
N/A 7,000
6,400 15,000
2,400 11,000
4,400 13,000
Description
Telescopic horizontal flue assembly
Telescopic horizontal flue assembly
Vertical flue assembly
Vertical flue assembly
ErP - 6720818077 (2016/04)