Heatrae Sadia Megaflo Eco Solar Series, Руководство по эксплуатации продукта

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Unvented Hot Water Cylinder
29
Fault finding
The Fault Finding Chart (Table 6 below) will enable operational faults to be identified and their possible causes rectified. Any work carried out
on the MEGAFLO
Eco Solar unvented water heater and its associated controls MUST be carried out by a competent installer for unvented water
heating systems. In case of doubt contact the MEGAFLO Eco Solar Service Division, (p. 40).
Table 6 - Fault Finding Chart
MAINTENANCE AND
SER
VICING (3)
REMEDY
FAULT
1. M ains w a t e r s upply off.
2. S trainer bloc k ed.
3. C old W ater C om bination
V alve inc orrec tly fitted.
3. C hec k and refit as required.
1. B A C K U P im m ers ion heater
not s w itc hed on.
1. C hec k and s w itc h on.
2. B A C K U P im m ers ion heater
therm al c ut-out has operated.
2. C hec k . R es et by pus hing button.
(Figure 16, page 23)
3. IND IR E CT program m er s et
to C entral H eating only .
3. C hec k . S et to a Dom es tic H ot W ater
program m e.
4. IND IR E CT boiler not
w ork ing.
4. C hec k boiler operation. If fault is
s us pec ted c ons ult boiler m anufac turer's
ins truc tions .
5. IND IR E CT therm al c ut-out
has operated.
5. C hec k . R es et by pus hing button on c ut-
out. Chec k operation of indirec t
therm os tat (Figure 16, page 23 ).
6. IND IR E CT m otoris ed valve
not c onnec ted c orrec tly .
6. C hec k wiring and/or plum bing
c onnec tions to m otoris ed valve (s ee F ig 13
and 14).
2. C O N TIN UA LLY
2a. C hec k pres s ure from 3 Bar Presssure
Reducing Valve. If greater than 3 bar
replac e P res s ure R educ er c artridge.
b. E x pans ion V alve s eat
dam aged.
M ilk y w ater
1. O x y genated w ater.
No hot w ater flow
W ater from hot taps is c old
W ater dis c harges from
E x pans ion V alve
1. C hec k and open s top c oc k .
and c lean (s ee page 28).
2. Turn off water s upply . R em ove s trainer
1. W ater from a pres s uris ed s y s tem
r e l e a s e s o x y g e n b u b b l e s w h e n
fl o w i n g . T h e m i l k i n e s s w i l l
d i s s a p p e a r a f t e r a s h o r t w h i l e
2b. R em ove E x pans ion Relief c artridge from
8 Bar Pressure Relief valve and check seating. If
necessary fit new cartridge
a. 3 B a r P r e s s u r e R e d u c i n g
Valve not working correctly
POSSIBLE CAUSE
7. SOLAR, Insufficient solar
gain with no auxiliary heating
switched.
7. Check auxiliary heat source is switched on and
is controlled to provide heat gain if no solar
output is available
W ater dis c harges from the
T&P Relief valve continually
1. Therm al c ontrol failure
N O TE w ater w ill be very hot.
1. S w itc h off pow er to im m ers ion heater(s )
and s hut dow n boiler. D O N O T turn off
w ater s upply . W hen dis c harge s tops
c hec k all therm al c ontrols , replac e if faulty .
1. Air volume in Megaflo eco has
reduced
1. S ee P a g e 3 8 ( O p e r a t i o n a l F a u l t s
s ec tion for re-c harging)
W ater dis c harges from t h e
T&P Relief valve intermittently
2. 8 Bar expansion relief valve
faulty
2. C h e c k v a l v e a n d r e p l a c e i f n e c e s s a r y
1. INTERMITTENTLY
Air volume has reduced within
the expansion vessel
1. See Page 28 for details on how to test and
recharge