Smith's Heating First STR7-12V User Manual

Dear Installer,

The following items should be included in the carton:

• Product

• Transformer with 450mm of pre-wired mains cable

• 2 single-pin male connectors

In the event of items missing or visible damage please
contact us on 01245 324560. We would be most grateful
if you would leave this Installation & User Guide and the
Guarantee Registration Card with the owner of the
property.

Thank you for your co-operation.

Steve Russell
Customer Service Manager

Sterling

Fan-Assisted Radiator

STR7-12V

Installation & User Guide

2

Introduction

Sterling 12V is primarily intended for installation directly onto a wall at high level in

bathrooms and other high humidity areas. The maximum recommended installation height

is 2.1 metres to the underside of the heater. There is no clearance required above or to

the side of the heater.

Sterling is designed for use on standard two piped pumped central heating systems. Pipes

are 15mm and either pipe may be used as flow or return. This product is not suitable for

one-pipe systems.

The transformer must be located outside the bathroom or high humidity area. The 450mm

lead attached to the transformer must be connected to the fused spur (mains supply).

You will need to provide a cable (twin core 0.5mm2 for lengths up to 6 metres, 1.0mm2 for

longer lengths) to connect the terminals on the product to the transformer. The two

single-pin male connectors are provided to connect this cable to the transformer terminals.

We recommend the use of full flow isolating valves. The valves should be accessible after

completion of the installation.

We also recommend the fitting of an air vent at the highest point on either the flow or

return pipe to remove any air trapped within the system.

Sterling is classified as a fixed appliance and electrical connection should be via a 3A-fused

spur. The fused spur must be located outside the bathroom or high humidity area but

should be accessible after completion of the installation. This appliance must not be

earthed.

To avoid the possibility of vibration the Sterling must be fitted on a flat even surface.

To conform to Building Regulations Part L (Part J in Scotland) this Sterling model can be

controlled by a remote wall mounted room thermostat (Smith’s Environmental Products

Part No. RT002). For further details please contact us on 01245 324560.

Please note the guarantee may be invalidated if this product is not installed and used in

accordance with these instructions.

3

Installation

1. Release the outer casing by

removing the screws on the
underside of the casing.

2. Secure the heater to the wall

using fixings suitable for the wall
type. Ensure the chassis is flat
to the wall and level. If
necessary use packing to
compensate for an uneven wall
surface. Maximum recommended
installation height is 2.1 metres
to the underside of the heater.

3. Connect the heating system flow

and return pipes to the heater
pipe work. Do not use soldered
fittings to the heater pipe work
as the heat generated could
damage internal wiring and
components. We recommend the
use of full flow service valves.
The valves should be accessible
after completion of the
installation. Check for water
leaks. Vent any trapped air from
the heating system.