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L
NVx Range Users, Installation & Servicing Instructions Doc Ref M104 issue 1.0 Sep 2018.
2. Check that the room thermostat and all automatic
controls are operating satisfactorily.
Hand these 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.
Limit Thermostat settings:-
LNVx (all)
= 90°C
Note: LNVx35 & 90 - 140 units have a single
limit thermostat whereas LNVx 90 to LNVx
140 units have two. The second stat is at the
opposing side of the heater to the burner/
controls end. The limit thermostats are wired in series
(either thermostat will shut down the burner).
1. Close the gas service tap and ensure that the gas valve
is heard to close within 1 second and that the lockout light
is illuminated. Note that the heater may attempt five
re-ignitions before going to lockout. Open the gas service
tap and reset the unit from lockout.
Full maintenance should be undertaken not less than once
per year by a qualified person.
No 'specialised 'tools will be required to carry out this
service.
A fault finding guide is given in section 3.1 to aid servicing.
After any servicing work has been complete, or any
component replaced, the air heater(s) must be fully
commissioned and tested for soundness as described in
Section 2.6.
To commence servicing, firstly open the side access door
by rotating the quarter turn screw(s).
1. Ensure that the gas service valve is turned OFF
and then unscrew the union nut situated immediately
downstream of it.
2. Disconnect the spark and rectification leads from the
control box and remove the electrical plug connections
from the top of the gas control valve assembly.
3. Remove the burner heat shield, 3 screws.
Gas Safety (Installation & Use) (Amendment)
Regulations
It is law that all gas appliances are installed,
adjusted and, if necessary, converted by
qualified persons* in accordance with the
current issue of the above regulations.
Failure to install appliances correctly can lead to
prosecution. It is in your own interests and that of safety
to ensure that the law is complied with.
* Gas Safe Registered Engineer.
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.
NOTE: If a suspended air heater is to be
serviced do not lean ladders against the
heater.
Ensure that an access tower or equivalent is
used.
NOTE: The access door to the controls section
may be removed to improve access.
Open the door to 90°, remove the earth cable
at the bottom, and then lift the door vertically
upwards to disengage the hinge plates.
Refit in reverse order. Ensure that the earth
cable is refitted.