Technical data

GUH RANGE PROPANE GAS FIRED UNIT HEATERS
Page 25 of 41
q) After ten minutes check burner head pressure is as specification - adjust as necessary by removal of
the gas pressure adjustment cover, and using a screwdriver turn the adjustment screw on the governor as
follows: Anti clockwise to reduce. Clockwise to increase.
r) Check that the gas pressure remains satisfactory for all appliances on the same circuit
s) Undertake combustion tests checking CO CO
2
and efficiency (see section 7.0) check for spillage using
a dry, water cooled ,rhodium or chromium plate.
t) Check that the burners are extinguished when the thermostat is set to its lowest setting, and then
remove the manometers.
u) Turn the thermostat to its highest setting to re light the burner and replace the adjustment screw cover
v) Check flame failure circuit by loosening the connection between the thermocouple and the overheat
limit control on the main gas valve, the ignition and main burners should go out, retighten after testing
w) Turn the thermostat to its lowest setting and shut off the gas supply at the gas control valve, allow the
fan to continue to run until the heater is cooled sufficiently for the fan to shut down
x) Turn off the electrical supply
y) Set thermostat to desired room temperature and replace the side cover panel
z) Ensure that the user is familiar with the heater and its controls and that the user is satisfied with the
commissioning and testing, and that he is aware of the instructions within the manual
It is strongly advised that the commissioning engineer runs through the lighting, shutdown, and general
safe and efficient running of the heater before hand over.
3.4 Ignition sequence automatic versions
Automatic control is by way of a Satronic controller (with automatic gas valve replacing the manual
standing pilot valve) used in conjunction with a Satronic spark generator (which replaces the piezo
igniter as fitted to manual units) , giving a maximum pilot sequence of 15 seconds.
Flame supervision is via a flame sensor rod. instead of the thermocouple as fitted to the manual units.
The sequence is as follows: as per 3.3 a- i
The start signal will ignite the pilot, once the flame proving has taken place the main gas valve will
supply the burner and burner ignition will occur.
Continue as per 3.3 m-y
3.5 Hand over
Upon satisfactory completion of commissioning and testing, the customer should receive the completed
guarantee and commissioning card (section B) from the commissioning engineer together with the user
instructions (section C).
At the same time the user should be made aware of the most efficient and economical methods of
operation.
The user must be familiar and satisfied with the safety, ignition, shutdown, and general operational
procedures.
4.0 Servicing
Warning
It is a requirement that only qualified personnel are allowed to carry out installation commissioning or
servicing.
In addition only spare parts recommended by the manufacturer may be fitted, and the installer should
provide a list of recommended spare parts that are available through the manufacturer or his agent (see
section 9)