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Electrical connenction

Ionisation current

The minimum ionisation current is 0.9 micro-Amperes DC.

Below this current the burner controller will assume no flame

is present. When in normal operation, the ionisation current
will be about 1.2 to 1.3 micro-Amperes DC when only the

pilot flame is burning.

(Adjust the main burner pressure to zero to be able to
measure under this condition).
With pilot and main burner in operation, the ionisation
current will be approx. 6.0 to 6.3 micro-Amperes DC.
Ionisation current can be measured by connecting a

universal meter in series with the connection to the flame

probe. Make sure meter is set for Direct Current. Alternating
Current gives no information about the system’s behaviour.

FOR THE INSTALLER

2.1 Installation

This water heater must be fitted in a location that will permit

the provision of an approved flue system and adequate

ventilation.
A service clearance of 50 cm at the sides and rear of the
unit and 100 cm at the front of the unit must be allowed
for ease of servicing. Adequate distance must be allowed
between the top of the unit and any obstruction or ceiling to

allow the flue baffle and anode to be inspected, cleaned or,

in the case of the anode, replaced if necessary.
The water heater must stand on a level surface resistant
to heat, insulated in accordance with local by laws and

Building Regulations and with sufficient strength to support

the weight of the unit when full of water.
The heater must stand on its feet as supplied and the
space beneath the bottom casing kept clear as this is the
path for combustion air to enter the heater.
This water heater must not be installed in a bathroom,
bedroom or in a cupboard opening on to such rooms.
This water heater must not be installed in any area where

flammable materials are used or stored.

Insufficient ventilation may give rise to a risk of fire,

explosion or suffocation. If in doubt consult the national
and local regulations governing the installation of gas
appliances or local gas service organisation.

2.1.1 Regulations and Related Documents

Gas Safety Installations and Use Regulations 1998,

(as amended).

It is law that competent persons, in

accordance with the above regulations install all gas
appliances. Failure to install appliances correctly could
lead to prosecution. It is in your own interest, and that of
safety, to make sure that this law is complied with.
The installation of the boiler

MUST

be in accordance with

the relevant requirements of the Gas Safety Regulations,
Building Regulations, IEE Regulations and the Water

Supply (water fittings) Regulations.

The installation must also be in accordance with any
relevant requirements of the HSE, local gas region and
local authority and the relevant recommendations of the
following documents: -

British Standards

BS 6891:

Specification for the installation of low-pressure

gas pipe work of up to 28 mm (R1) in domestic premises (2

family gas). For larger installations see

IGE/UP/2

below.

BS 6798:

Specification for installation of gas-fired boilers

of rated input not exceeding 70 kW net.

BS 6644:

Specification for installation of gas-fired hot