Gas Supply; Electrical Supply; Water System - Keston Celsius 25 Installation And Servicing Instructions

WD209/1/2000
h.
Note: It is equally important to seal the air inlet with solvent cement as the flue outlet
pipe joints.
3.5 CONDENSATE DRAINAGE
Connect the condensate drainage system to the boiler. It is advisable to use a detachable
fitting at connection to the boiler to enable easy removal for servicing.
Fill the condensate trap by pouring water into the boiler flue spigot until water is seen to
flow freely from the condensate drainage system. Make the final connection of flue pipe to
the boiler.
Details are provided in Chapter 2 - Section 2.11 Condensate Drainage
Connection :
3.6

WATER SYSTEM

Connect the flow and return pipework to the boiler. Details of system requirements are
given in Chapter 2 - Section 2.7 Water Systems.
Connections
For optimum performance after installation, this boiler and its associated central heating
system must be flushed in accordance with the guidelines given in BS7592:1992,
"Treatment of water in domestic hot water central heating systems".
This must involve the use of a proprietary cleaner, such as Fernox Superfloc, or
BetzDearborn's Sentinel X300 or X400. Full instructions are supplied with the products,
but for immediate information, please contact Fernox on 01799 550811 or BetzDearborn
on 0151 420 9563.
For long term protection against corrosion and scale, after flushing, it is recommended
that an inhibitor such a Fernox MB1 or BetzDearborn's Sentinel X100 is dosed in
accordance with the guidelines given in BS7593:1992.
3.7

GAS SUPPLY

Connect the gas supply to the appliance. Details of gas supply requirements are given in
Chapter 2 - Section 2.6 Gas Supply. Supply of adequate gas pressure (with the boiler
running) is critical to ensure reliable operation of the boiler.
Connections
3.8

ELECTRICAL SUPPLY

The entry point(s) for the electrical supply cable(s) is in the base of the appliance (see
Section 2.2 Service Connections fig. 2.1.2) via two cord grip bushes. Feed the cable(s)
through its bush and route inside the cabinet to the connection strip located to the front
bottom right of the cabinet.
1. The electrical supply must be as specified in Chapter 2 - Section 2.4 Electrical
Supply.
WARNING :
2. All external controls and wiring must be suitable for mains voltage.Supply wiring
should be in PVC insulated cable not less than 1.0mm
(material code H05VV-F).
3. The permanent live supply connection may be via a 3 amp fused double pole
switch, serving only the boiler. (Refer to Chapter 2 - Section 2.4 Electrical Supply).
The system controls and 2A switched supply for the boiler must also be supplied
via this isolator.
4. Securely tighten the terminal screws and route the cable through the re-openable
cable clips. Ensure all cables are secured and that the cord grip bush is tightened
to securely grip the main cable at entry to the cabinet. Remove the factory fitted
link wire between terminals SL and SL(Link) on the boiler.
The supply cable(s) must be connected to the main terminals as follows:
Installation & Servicing Instructions
Chapter 3 : Installation
Check all connections for security and re-seal any joints using solvent
cement where soundness may be in doubt.
22 mm plastic pipe.
: 0.75" BSPF
: 0.75 inch BSPF.
THIS APPLIANCE MUST BE EARTHED.
The Keston Celsius 25 & 25P
2
to BS 6500 Table 16
Page : 17