Technical data

GUH RANGE PROPANE GAS FIRED UNIT HEATERS
Page 18 of 41
2.6 Electrical Installation
All electrical wiring and connections must be in accordance with the relevant European, National, and
Local regulations as well as to IEE Standards.
Warning
Ensure that the Electric and gas supplies are turned off before any electrical work is carried out on the
heater.
Also ensure that wiring cannot make contact with any metal surfaces liable to be subject to high
temperatures, and where insulation of the wiring could be impaired as a result of such contact.
All GUH models must be earthed.
Caution
The main electrical supply must not be switched off or disconnected as a method for stopping the heater,
the exception to this is in the event of an emergency, or when the heater has been allowed to cool
sufficiently to prevent any damage from being sustained to the heater or its controls (ie: during
servicing).
Claims for damage will not be considered if they have resulted from incorrect wiring or the incorrect use
of the heater
Each heater requires a permanent 230V 50Hz 1ph electrical supply, which must be wired through a fused
isolator fitted with a fuse of the correct rating (see section 7.1). The correct supply connection points for
the live, neutral, and earth are clearly indicated on the wiring diagram mounted inside the wiring box
cover.
Wiring diagrams are also detailed within this manual, (section 6.0 )
The electrical supply isolator should be mounted adjacent to the air heater in an easily accessible position
to allow for servicing isolation, or emergency shut off.
2.7 Electrical panel
Warning
Ensure that the mains isolator is turned OFF before undertaking any electrical on the heater.
Access to the electrical panel is gained by removing the right hand heater side panel, (Lift the panel clear
of the lower lip, pull panel outwards and let it slide until it is retained by the two lugs and the lower lip.
The panel can be fully removed by tilting one of the top corners towards the heater thereby disengaging
the lugs).
The cover to the electrical panel can be removed by undoing the two screws which secure it to the panel.
A copy of the wiring diagram is affixed to the inside of the cover .
Warning
Ensure that all connections are secure and that there are no loose strands which could bridge across the
terminals.
A minimum conductor size of 1.0mm (diameter) is required.
Caution
One electrical panel per heater is required, unless heaters are specified for multiple heater control
applications. On no account should more than one heater be connected to a single time switch or
thermostat. The only exception to this is when a control panel suitable for multiple heater applications is
supplied by the manufacturer, in which case the wiring diagram supplied with the control panel should be
read in conjunction with the existing wiring diagram.
Any ancillary electrical items e.g. room thermostats , time switches, remote panels etc, must be wired
into the heater electrical circuit in accordance with the diagrams provided