to minimise contact bounce.
For electrical connections of external controls see the
wiring diagram accompanying these instructions.
6. Commissioning & Testing
Note: Turn key for electical panel access door locks may
be used to operate door elctrical interlock for commissioning
purposes .
6.1 Electrical Installation
Checks to ensure electrical safety must be carried out by
a qualified person.
6.2 Gas Installation
The whole of the gas installation, including the meter,
should be inspected and tested for soundness and purged
in accordance with the recommendations of IM/16:1988.
6.3 Fan Rotation
1. Open main electrical panel and switch Eurotrol contol
(see Eurotrol manual supplied) in main electrical panel to
(SUMMER) and the time clock to 'ON'.
1. Close main electrical panel and with door isolator switch
'ON' turn the AUTO-OFF-MAN switch to 'ON' to start main
air fans. Ensure that the fan direction of rotation corresponds
with the direction of rotation arrow on the fan shroud. If
necessary reverse the direction of rotation by interchanging
any two of the 3ph main supply leads at the terminal strip
in the electrical panel.
2.Reset the Eurotrol to (Winter)
6.4 Lighting the Air Heater
6.4.1 Gas Controls Assembly - Soundness Check
1. Ensure the gas service valve at the inlet to the gas
controls assembly is shut.
2. To prove soundness of the first main safety shut-off valve
and first start gas safety shut-off valve:-
a) Connect pressure gauge to the inlet pressure test
point on the main valve block or inlet pipework.
b) Open gas service valve and allow pressure to stabilise
before shutting it again. The valves are sound if no
pressure drop is observerved. If a pressure drop is
observed do not proceed until the fault has been
rectified. Remove pressure gauge and refit sealing
screw in pressure test point.
6.4.2 Sequence Check
1. Refer to the burner instructions supplied with the heater.
6.4.3 Final Adjustment
1. Remove the sealing screw from the pressure test point
located on the side of the gas inlet to the burner head and
attach a pressure gauge. Remove the sample point cover
plug from the outlet flue length and insert a CO
2
measuring
instrument.
2. Remove the link in the main electrical control panel to
isolate the main gas valves.
3. Turn "ON" the main electricity supply and check that the
following sequence of events occur.
i) Burner fan runs.
ii) Ignition spark is heard.
iii) Start gas valves open.
iv) Start gas flame is established.
4. Check that the start gas pressure agrees with that in
Tables 3.1 or 3.2. If necessary adjust the start gas pressure
(See Data Sheet).
4. Turn "OFF" the main electricity supply.
5. Reconnect the main gas valves electrical link.
6. Turn "ON" the main electrical supply and the burner will
run through its sequence untill main flame is established.
Check that the main burner gas pressure agrees with that
on the specification sheet. If necessary adjust the main
burner gas pressure (See Data Sheet and also Burner
Manual for method).
7. Measure the CO
2
content of the flue gases. If it is
necessary to adjust the combustion air ratio controls, to
obtain a reading of 9.0 - 9.5%, refer to the Burner Manual.
8. Remove pressure gauge, refit sealing screw in pressure
test point and flue sample point cover plug.
6.4.4 Final Soundness Test
1. After making final gas rate checks all joints on the gas
controls assembly must be tested for soundness using
leak detection fluid.
6.4.5 Control Settings
1. The mode setting of the Eurotrol OSII should be
(Winter).
2. The modulating control temperature set point should be
2-3°C lower than the Eurotrol OSII day set point.
6.5 Hand Over
Hand the Users Instructions to the user or purchaser for
retention and instruct in the efficient and safe operation of
the air heater and associated controls.
Adjust the automatic controls to those values required by
the User.
Finally, advise the user or purchaser that, for continued
efficient and safe operation of the air heater, it is important
that servicing is carried out annually.
In the event that the premises are not yet occupied turn off
the gas and electricity supplies and leave instructional
literature adjacent to gas meter.
7. Servicing
WARNING: Always switch off and disconnect electricity
supply and close the gas service valve before carrying out
any servicing work or replacement of failed components.
Access doors on TE units are fitted with electrical interlocks
however these alone must not be relied upon to prevent
equipment operation during maintenace or servicing work.
7.1 General
Full maintenance should be undertaken not less than once
per year. After any servicing work has been completed or
any component replaced the air heater(s) must be fully
commissioned and tested for soundness as described in
Section 6.
7.2 Burner Maintenance
1. Refer to the Burner Supplement supplied with the heater.
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