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Pre-installation
4.3.1
Available pump head
In order to save as much energy as possible and the
minimise the possibility of water circulation noise, a low
characteristic should be chosen.
The pump map can be selected within 2.1C in the Boiler settings menu
list: ( 6.5.13, page 45).
• 0 (pump variable speed setting)
• 1 (constant pressure low)
• 2 (constant pressure low/middle)
• 3 (constant pressure middle/high)
• 4 (constant pressure high)
The factory setting is:
4 (constant pressure high)
0.80
0.70
0
0.60
0.50
0.40
0.30
0.20
0.10
0.00
0
200
400
600
Fig. 7
Pump curve
Constant pressure head
If the constant pressure head option (1 - 4) is chosen, the differential
pressure between the CH flow and return will be kept at the
corresponding value. When the CH system is cold and the radiator TRVs
are fully open, the pump will be running faster to try and maintain the
pressure differential. When the TRVs start to close and the resistance of
the CH system increases, the pump speed reduces to maintain the
pressure.
The setting (1 - 4) to be selected is dependent upon the resistance and
heat load of the CH system. The higher these are, the higher the pressure
constant.
18
4
3
2
1
800
1,000
1,200
1,400
Flow rate (l/hr)
6720806944-88.1Wo
4.4
Appliance location and clearances
4.4.1
Installation
This appliance is only suitable for installing internally within a property at
a suitable location onto a fixed, rigid surface at least the same size as the
appliance and capable of supporting the appliance weight.
No surface protection is required against heat transfer
from the appliance.
The appliance must be installed where:
• An engineer can gain clear and safe access to work on the product or
component, including making adequate provision for visual
inspection of flues in voids.
• The homeowner can gain clear and safe access to the controls,
check, top up or reset the appliance.
• Products in loft cavities must have permanent fixed lighting, a
permanent fixed retractable ladder and a fixed floor area sufficient to
allow access for normal use and servicing directly under and around
the product and between and the access hatch.
4.4.2
Installation and servicing clearances
9 3 0 m
1,600
6 0 0 m
5 m m
4 1 0 m
m
Fig. 8
Unventilated compartment
[*]
Minimum clearance to removable door
[**]
Minimum clearance required for servicing
[***] Height for either 60/100 flue or 80/125 flue
4.4.3
Compartments
Follow the requirements of BS6798 and BS5440 Part 2 and note:
• Minimum clearances must be maintained.
• An access door is required to install, service and maintain the
appliance and any ancillary equipment.
• If fitting the appliance into an airing cupboard use a non-combustible
material to separate the appliance from the airing space.
The material can be perforated up to a maximum hole size of 13mm.
m
*
2 0 m m
m * *
5 m m
m
3 5 0 m
6720806944-02.1Wo
Greenstar i System
- 6 720 806 945 (2015/07)
ErP
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