Reznor, Guardian GB GR and GS, Installation Manual, EN 2021-08, D301214 Iss D Page No 35
MS
Maintenance and servicing
Always ensure that the main external
electricity supply is switched off and
lock the switch (if fitted) before
commencing any maintenance on this
heater
To obtain the best results from the
heater, it is essential to avoid the
accumulation of dust and dirt within
the unit on the air inlet and discharge
grilles. For this reason, regular
cleaning isnecessary, paying
particular attention to the removal of
dirt build up on the fan assembly.
Cleaning of the fan is best carried out with a soft
brush and vacuum cleaner
The product should be serviced annually, by a
competent person.
1. GS units.
Loosen the two screws securing the
inlet cover and slide towards the end cover, now
loosen the two screws in the next panel and slide
towards the first panel which will then allow this
panel to be released and lifted out of the dog
bone slot This panel can then be lifted out of the
tabs at the bottom to fully release. see figure 9
on page 14
2. GR units
loosen the screws securing the inlet
grille and hinge down, the grille can be removed
by releasing the spring loaded bolt to either side.
See figure 12 and 13 on page 14
3. With a soft brush clean away any dust from the
motor and elements.
4. Check the security of all the components
5. Check for any signs of deterioration and replace
components as necessary
6. Inspect the wiring for damage, chaffing of the
outer case, damage cut or crushed and security
in the terminals
7. Check that the fuses are rated correctly.
8. Clean the honeycomb outlet
Inlet foam filter replacement GS
Figure 27 GS inlet foam retaining clip 1
1. Remove and replace the foam inlet filter, by
unhooking the leg of the clip and passing it
through the dog bone hole in the frame, then
release the remaining parts of the clip to allow
the foam filter to be removed and replaced.
Carefully refit the clip and ensure the foam is not
creased and secure.
Figure 27.1 GS removing the inlet foam
retaining clip
Figure 26 GR Inlet cover
