4
British Gas 4100 & 4125 RD2 -
Installation & Servicing
GENERAL
INTRODUCTION
British Gas RD2
above range
is of floor standing, fanned
flue gas boilers. They are rated to provide central heating
outputs of 29.3 kW (100,000 Btu/h) to
36.6 kW (125,000 Btu/h).
The boiler has a cast iron heat exchanger and is supplied
fully assembled, complete with a white enamelled mild
steel casing.
A door at the top of the casing front panel hinges down,
revealing the boiler thermostat control.
The boilers are supplied with kits for rear, side and top
(100 only) flue outlets.
The boilers are suitable for connection to open-vented
systems and sealed water systems.
The systems may be:
z
pumped or gravity circulating indirect DHW only
z
pumped central heating only
z
pumped central heating combined with either a pumped
or gravity circulating indirect DHW circuit.
The diagnostic controls within the boiler are capable of
communicating key operational data to a central computer data
processing system via the house ring main and public telephone
system known as Remote Appliance Diagnostic System (or
RADS).
RADS can identify actual failure, or predict imminent failure of
components and specify the corrective procedures to the British
Gas Service Engineer.
To enable the system to operate, a remote mounted interface
(Gateway) is required to receive and transmit data from the
boiler.
Without this facility, the boiler operates as standard fanned flued
boiler.
OPTIONAL EXTRA KITS
Extension Duct kit
To extend standard flue.
90
o
Flue Elbow Kit
CONTENTS
Air Supply
. .....................................................................
7
Boiler Assembly - Exploded view
.............................
12
Boiler Clearances
.........................................................
6
Electrical Connections
...............................................
23
Electrical Diagrams
............................................
23 - 26
Electrical Supply
...........................................................
8
Extension Ducts - Fitting
...........................................
21
Fault Finding
...............................................................
38
Flue Fitting
.............................................................
15-20
Flue Installation
............................................................
7
Gas Safety Regulations
...............................................
5
Gas Supply
....................................................................
7
Initial Lighting
.............................................................
27
Installation
...................................................................
12
Mandatory Requirements
.........................................
5-7
Pump Systems
..............................................................
9
System Diagrams (Electrical)
....................................
25
Terminal Guards
. ..........................................................
7
Water Connections
........................................
5, 15 & 22
Water Circulation
..........................................................
8
Water Systems
..............................................................
9
NOTE TO THE INSTALLER: LEAVE THESE
INSTRUCTIONS ADJACENT TO THE GAS METER.
ALSO COMPLETE THE BENCHMARK LOG BOOK
AND GIVE THIS TO THE CUSTOMER.
British Gas RD2
Natural Gas only
Appliance type: C
12
Certified - P.I. No. 87BL30
Destination Countries: GB.
4100 RD2
G.C. No. 41 392 72
4125 RD2
G.C. No. 41 392 73
BENCHMARK LOG BOOK DETAILS
Boiler
Page
Make and model ........................................................ 4
Appliance Serial No. on Data Badge ........................ 9
Controls
...............................................
as applicable
Forall boilers
Flushing to BS.7593 .................................................. 8
Inhibitor ...................................................................... 8
Gas inlet working pressure ....................................... 6
Burner operating pressure ........................................ 3
Heat input .......................................... to be calculated
Temperature differential ............. measure and record
For combination boilers only
................. Not applicable
For domestic hot water mode
................ Not applicable
For condensing boilers
........................... Not applicable
For all boilers:
complete, sign & hand over to customer
For assistance see Technical Helpline on the back page