701
WALL MOUNTED, ROOM SEALED,
FAN ASSISTED, GAS COMBINATION BOILER
INSTALLATION
INSTRUCTIONS
01/01
Phone numbers:
Installer
Service Engineer
Serial No.
G.C. NO: 47-267-16
Lichfield Road, Branston Industrial Estate, Burton Upon Trent, Staffordshire DE14 3HD
FOR SERVICE INFORMATION OR
HELP TELEPHONE: 08707 282 885
ALWAYS QUOTE YOUR SERIAL NUMBER
ALL SPECIFICATIONS SUBJECT TO CHANGE
Tel. 08707 282 885 - Fax 08707 282 886
W.R.C. No. 9207075
Read these Instructions thoroughly
before installation
FERROLI HELPLINE
FOR IMMEDIATE ASSISTANCE
Appr. Nr. B94.02T CE 0063AQ2150
page INDEX
701
3 General Description
3 Related Documents
4 Technical Data
5 Appliance Dimensions
6 Boiler Flow Diagram
7 Key of boiler flow diagram
8 Installation Details
8 Location of Boiler
8 Air Supply
10 Flue System
10 Gas Supply
10 Water System
10 Central Heating Pump
12 Sizing of expansion vessel
13 Installation of Boiler
13 1. Unpacking
13 2. Mounting the Boiler Jig
on the Wall (rear flue)
13 3. Mounting the Boiler Jig
on the Wall (side flue)
14 Drilling template
15 4. Preparing the Flue Assembly
16 5. Connecting the Boiler
18 6. Fitting the Flue Assembly
18 7. Electrical Installation
19 8. Commissioning & Testing
19 8.1 Filling the Central Heating System
19 8.2 Filling the Domestic Hot Water System
19 8.3 Electricity Supply
19 8.4 The Gas Installation
20 8.5 To Light the Boiler
21 8.6 To Range Rate the Boiler C.H.
22 Gas pressure adjustment with Honeywell
VR 4600 N 4002 valve
23 8.7Clock
24 8.8Remove of clock
25 8.9 D.H.W. Burner Pressure
25 9. System operation
25 10. Handing Over to the User
26 Spare Parts List
27 Domestic Hot Water
Performance + Modureg
28 General Wiring Diagram
29 Fast Fault Finding
30 Special Installation Possibilities
2
701
General Description
The Ferroli 701 is a wall mounted, room sealed, fan assisted, combination boiler for Central Heating
(C.H.) and domestic Hot Water (D.H.W.).
The boiler is of light weight construction and the heat exchanger provides Central Heating and Domestic
Hot Water from an integrally designed unit. The boiler contains its own expansion vessel for sealed systems.
The wall mounting jig contains all the isolating cocks for the water and gas supplies which can be fitted to
the wall and provided with all the necessary gas and water connections prior to the boiler being attached.
The flue can either be left hand, right hand or rear. There are three flue lengths available and they are 0.75
metres (for wall thickness up to 565 mm), 2 metres (for wall thickness up to 1815 mm) and 3 metres (for wall
thickness) up to 2815 mm these wall thicknesses assume a rear flue outlet. For side outlet the effective wall
thickness for each flue length is reduced by 91 mm plus the distance of the appliance from the side wall. The
Central Heating and the Domestic Hot Water temperature is controlled by the Honeywell Modureg valve
in conjunction with the P.C.B. The boiler is fitted with its own Central Heating pump. The pump is switched
ON/OFF by the time clock and/or a 24 Volt room thermostat. The pump circuit also has a 6 minute over-run
time. There is a Domestic Hot Water flow switch fitted and when there is a demand for Domestic Hot
Water the Central Heating pump is switched off making available the maximum output of the gas burner
for Domestic Hot Water. On the P.C.B. the output for Central Heating can be set. However, this is not required
for the majorities of installations as the boiler will automatically adjust its output to the system demand-AUTOMISUR control. This does not influence the maximum output for domestic hot water. The appliance is not
suitable for external installation.
Related Documents
This appliance must be installed strictly in accordance with these instructions:
The Gas Safety Regulations (Installations & Use) 1994.
The Local Building Regulations.
The Building Regulations.
The Buildings Standards (Scotland - Consolidated) Regulations.
British Standards Codes of Practice:
B.S. 7593 1993 TREATMENT OF WATER IN DOMESTIC HOT WATER CENTRAL HEATING
SYSTEMS
B.S. 5546 1990 INSTALLATION OF HOT WATER SUPPLIES FOR DOMESTIC PURPOSES
B.S. 5440 PART 1 FLUES
B.S. 5440 PART 2 AIR SUPPLY
B.S. 5449 1990 FORCED CIRCULATION HOT WATER SYSTEMS
B.S. 6798 1987 INSTALLATION OF GAS FIRED HOT WATER BOILERS
B.S. 6891 1989 GAS INSTALLTIONS
B.S. 7671 1992 IEE WIRING REGULATIONS
B.S. 4814 1990 SPECIFICATION FOR EXPANSION VESSELS
Model Water Bye Laws.
3
701
Technical Data G20 G31
Nominal Heat Input D.H.W. & C.H. (gross) 28.6 kW 28.0 kW
Minimum Heat Input D.H.W. & C.H. (gross) 12.8 kW 12.5 kW
Nominal Heat Input D.H.W. & C.H. (net) 25.8 kW 25.8 kW
Minimum Heat Input D.H.W. & C.H. (net) 11.5 kW 11.5 kW
Nominal Heat Output D.H.W. & C.H. 23.3 kW 23.3 kW
Minimum Heat Output D.H.W. & C.H. 9.7 kW 9.7 kW
Maximum Gas Rate 2.72 m
Maximum Burner Pressure 14.5 mbar 36.0 mbar
Minimum Burner Pressure 2.7 mbar 7.9 mbar
Injector Marking (Main Burners) 210
Injector Size (4 off) 2.10 mm
Pilot Injector Marking 38/33A
Dimensions (overall):
Height 1020 mm
Width 480 mm
Depth 360 mm
Weight (nett) 51 kg
Weight (gross) 53 kg
Electricity supply: 230 V ~ 50 Hz
External fuse 3 A
Internal fuses on P.C.B. F2A to BS4265 - (2 Amp. Fast)
Electrical Input 150 W
Central Heating:
Max. Flow Temperature 85°C
Temperature Rise Across Boiler 20°C
Domestic Hot Water Flow:
30°C Rise 11.1 litres/min.
32°C Rise 10.4 litres/min.
35°C Rise 9.5 litres/min.
40°C Rise 8.3 litres/min.
Minimum Domestic Hot Water Flow 2.5 litres/min.
Maximum Domestic Cold Water Inlet pressure 10 bar
Minimum Heating Circuit Pressure 0.8 bar
Maximum Heating Circuit Pressure 3.0 bar
Low water pressure switch 0.4 bar
Boiler Water Capacity: Heating 2.0 litres
Domestic Hot Water 0.5 litres
Connections:
Gas 22 mm
Domestic Hot Water Outlet 15 mm
Domestic Cold Water Inlet 15 mm
Pressure Relief Valve Drain 15 mm
Central Heating Flow 22 mm
Central Heating Return 22 mm
Minimum Installation Clearances:
Sides -Left hand 5 mm
Right hand 5 mm
Front 50 mm*
Minimum Clearance below 200 mm
Minimum Clearance above 100 mm
3
/h 2.66 m3/h
Notes:
* Access to the front of the boiler must be
available for maintenance (min. 600 mm)
4
Appliance Dimensions
701
FRONT VIEW
85
900
480
12 3 4 5 67
Key
1. Electricity cable entry
2. Gas supply
3. Domestic Hot Water outlet
4. Domestic Cold Water inlet
5. Central Heating Pressure relief valve
6. Central Heating Flow outlet
7. Central Heating Return inlet
8. Air intake for two pipe flue systems
LEFT SIDE VIEW REAR VIEW
242
370
235
77.5507580505097.5
40
242
Fig. 1
120
8 - TOP VIEW
235
60
100
160
Øi92
Øi82
126.5
480
157
5
Boiler Flow Diagram
701
Fig. 2
6
Key
1. Fixing point
5. Room sealed compartment
6. Control panel
7. Gas inlet
8. Domestic hot water outlet
9. Cold water inlet
10. Central heating flow outlet
11. Central heating return inlet
14. Central heating safety valve
16. Fan
19. Combustion - heat exchanging compartment
20. Burner assembly
21. Main injector (4)
22. Burner (4)
23. Thermocouple
24. Spark electrode
25. Pilot
26. Combustion chamber insulation
27. Copper heat exchanger for C.H. + D.H.W.
28. Flue collector from heat exchanger
29. Internal flue exit
30. Flue/surplus air collector
31. Air pressure control damper
32. Central heating pump
34. C.H. flow temperature sensor
35. Air separator
36. Automatic air vent
37. Cold water inlet filter
39. Cold water flow limiter
40. Domestic hot water expansion vessel (optional)
42. D.H.W. temperature sensor
701
43. Air pressure switch
44. Combination gas valve
45. Knob gas valve
46. Operator gas valve
47. Modulating regulator (Modureg) gas valve
48. Burner pressure test point
49. Overheat cut-off thermostat
50. Central heating limit thermostat
51. Central heating frost thermostat
53. Heat exchanger venting point
56. Expansion vessel
57. Fan air inlet pressure test point
58. Fan air outlet pressure test point
59. Flue outlet pressure test point
60. Extended control knob to gas valve
61. C.H. selector switch
62. Time clock
63. C.H. boiler thermostat
64. C.H. temperature/pressure gauges
66. Microswitch combination gas valve
67. Ignition transformer
68. Control box with P.C.B.
71. Modulating balance tube
80. 230 V + 24 V roomstat terminal blocks
87. Venturi test point
90. Flue outlet pressure test point
91. Air pressure test point
114. Low water pressure switch
136. Flowmeter
145. C.H. pressure gauge
7
701
Installation Details
Gas Safety (Installation & Use) Regulations: 1994
In the interest of safety, it is the law that all gas appliances are installed by a competent person in accordance
with the above Regulations, Building Regulations/Building Standards Scotland, Codes of Practice, current
I.E.E. Regulations and the byelaws of the Local Water Undertaking. Failure to comply with the Regulations
may lead to prosecution; it is in your interest and that of safety to ensure that the law is complied with.
Important - If the boiler is to be fitted in a timber framed buiding it should be fitted in accordance
with the British Gas publication; Guide for Gas Installation in Timber Frame Housing: Reference DM2.
If in doubt advice must be sought from the Local Gas Region of British Gas Plc.
Location of Boiler
The installation of the
provide an adequate fixing for the boiler mounting bracket assembly. The location should be in an area where
the water pipes will not be subjected to frost conditions. In siting the combination boiler the following
limitations must be observed:
The combination boiler may be installed in any room or internal space, although particular attention
is drawn to the requirements of the current, i.e. wiring regulations and in Scotland the electrical provisions
of the building regulations applicable in Scotland, with respect to the installation of the combination boiler in
a room or internal space containing a bath or shower.
Where a room sealed appliance is installed in a room containing a bath or shower any electrical switch
or appliance control utilising mains electricity, should be so situated that it cannot be touched by a person
using the bath or shower.
Terminal Position
701 must be on a suitable non-combustible load bearing wall which will
POSITION MINIMUM SPACING (fig. 3) mm
A Directly below an openable window, air vent, or any other ventilation opening 300
B Below gutters, soil pipes or drainpipes 75
C Below Eaves 100
D Below a Balcony 100
E From vertical drainpipes or soilpipes 75
F From internal or external corners 100
G Above adjacent ground or balcony level 100
H From a surface facing the terminal 600
I Facing another terminal 1,200
J From opening (door/window) in carport into dwelling 1,200
K Vertically from a terminal on the same wall 300
L Horizontally from a terminal on the same wall 300
N Below carport 600
A Quinnel Barrat and Quinnel guard (part. No. C2) should be screwed to the wall centrally over the terminal,
when the distance is less than 2 m from the outside floor.
Air Supply
The room, cupboard or compartment in which the boiler is installed does not require a purpose provided vent.
8
Terminal Position
701
Fig. 3
Minimum Clearance
NOTES
* Access to the front of the boiler must be available for maintenance (min. 600 mm).
mm
Fig. 5
9
701
Flue system
The boiler allows the flue outlet to be taken from the rear of the boiler or from either side.
A standard flue length of 0.75 metres is provided. Alternative lengths of two or three metres can be supplied (equivalent
to wall thicknesses of up to 565, 1815 and 2815 mm for rear flues and deduct 91 mm plus distance from side wall for
side outlet flues).
It is absolutely essential, to ensure that products of combustion discharging from the terminal cannot re-enter the
building, or enter any adjacent building, through ventilators, windows, doors, natural air infiltration, or forced ventilation/
air conditioning.
Gas Supply
If necessary the local Gas Region should be consulted, at the installation planning stage, in order to establish the
availability of an adequate supply of gas.
An existing service pipe must not be used without prior consultation with the Local Gas Region.
A gas meter can only be connected by the Local Gas Region, or by a Local Gas Region's Contractor.
Installation pipes should be fitted in accordance with BS6891-1988.
Appliance inlet working pressure must be 20 mbar MINIMUM.
Pipework from the meter to the combination boiler must be of an adequate size.
The boiler requires 2.75 m3/h of natural gas.
Do not use pipes of a smaller size than the combination boiler inlet gas connection.
The complete installation must be tested for gas soundness and purged as described in BS6981-1988. All pipework
must be adequately supported. An isolating gas valve is provided and should be fitted on the manifold assembly.
Water System
Central Heating
It must be a sealed system. Detailed recommendations are given in BS6798, BS5449, BS6700 and CP342 Part.
2. Pipework not forming part of the useful heating surface should be insulated to prevent any heat losses or possible
freezing (i.e. in roof spaces or ventilated underfloor spaces). Drain taps should be positioned at the lowest point
of the system in accessible locations to permit the whole system to be drained down. The drain taps should be in
accordance with BS2879. Copper tubing to BS2871, Part. 1 is recommended for water carrying pipework. Pipework
in horizontal runs should have a gradient where possible to facilitate the removal of air. It should be ensured that
the boiler heat exchanger is not a natural point for collecting air. A typical heating system with domestic hot water circuit
is illustrated in fig. 6.
Important - A bypass must be fitted to ensure a minimum flow rate through the boiler of 6 l/min. The bypass should
be fitted as far as possible from the boiler if thermostatic radiator valves are fitted throughout.
Make up Water
Provision must be made for replacing water lost from sealed system. Reference should be made to BS6798, for
methods of filling and making up sealed systems. There must be no direct connection between the boiler's central
heating system and the mains water supply. The use of mains water to charge and pressurise the system directly,
is conditional upon the Local Water Byelaw. Again any such connection must be disconnected after use.
Domestic Hot Water
Always fit a water softener or descaler in «hard water areas». A 15 mm copper connection point on the boiler jig
bracket for attaching to the main supply is provided. The maximum domestic water pressure for the inlet supply is 10
bar (145 P.S.I.). If the cold mains supply exceeds 5 bar (72 P.S.I.), a water governor or pressure reducing valve must
be fitted by the installer into the mains supply in an inconspicuous but accessible position preferable between 3 and 5
metres (10-16 ft) before the appliance.
Such a valve must be approved by the Water Research Council.
Attention - Is drawn to the Model Water Byelaws.
Fittings manufactured from duplex (alpha-beta) brass are not acceptable for underground use and certain water
undertakings will not accept their use above ground.
10
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