Technical data

GUH RANGE PROPANE GAS FIRED UNIT HEATERS
Page 23 of 41
3.0 Commissioning
Note
It is a requirement that only suitably qualified and competent personnel are allowed to undertake the
commissioning of the heater.
It is also strongly recommended that prior to commissioning the engineers familiarises themselves with
the heater. the specific requirements of the installation /application, and the information contained within
the manual.
Warning
All heaters are subject to a rigorous test programme prior to despatch, whilst such a programme does
involve pre-commissioning and the setting of the heater to operate efficiently and within its designed
operational limits this does not mean that the function of thorough on site commissioning is less
important
It is strongly recommended that the equipment used for the sampling and analysis of the flue gases is
accurate to within +/- 0.1% and maintained so that it is regularly calibrated.
The following pre-commissioning checks should be undertaken, having first ensured that the gas and
electrical supplies are turned off.
(a) Check that all panels and fasteners are secure and in place.
(b) Check that the heater is mounted safely.
(c) Check that the flue is sealed, secured, and adequately supported.
(d) Check that the fan is free to rotate, that the fan is secured to its shaft, and that the guards and fan
assembly are all in place and properly secured.
(e) Check that the heater is installed so that it is not tilted and remains square.
(f) Check that the outlet louvers are set to offer minimum resistance to air flow.
3.1 Electrical pre-tests
The electrical safety checks must include the following
a) Test for earth continuity
b) Test for resistance to earth
c) Check live and neutral connections are correct.
d) Check to ensure that when the external controls operate to switch the heater off, power remains to the
fan
3.2 Gas supply pre-test
Ensure that the service pipework has been installed purged and tested in accordance with the relevant
regulations, and that the installation is served by an adjacent isolating cock.
Connection from the supply to the heater must also comply with the relevant regulations (see section 8.0)
and must have been purged and soundness tested by an authorised engineer.