18
Table 5: Fault finding chart
Table 6: Standing heat losses (ba
sed on an ambient air
temperature of 20
o
C and a stored water temperature
of 65
o
C)
HEAT LOSS
ENVIRONMENTAL
INFORMATION
POTTERTON GOLD products are manufactured from
many recyclable materials. At the end of their useful life
they should be disposed of at a Local Authority Recycling
Centre in order to realise the full environmental
benefits.
Insulation is by means of an approved CFC/HCFC free
polyurethane foam with an ozone depletion factor of
zero.
per day
(kWh/24h)
per year
(kWh/365d)
120
1.47
537
100
1.14
150
1.70
621
170
1.92
701
210
2.30
840
Standing Heat Loss
Nominal
Capacity
(litres)
250
2.22
300
2.52
811
920
416
While the following Checklist can be used for any installation covered by its description, only appliances
manufactured by Scheme Members will be covered by the rules and requirements of the Benchmark Scheme.
Y
D
E
M
E
R
E
S
U
A
C
E
L
B
I
S
S
O
P
T
L
U
A
F
1. M ains s upply off.
2. S trainer bloc k ed.
and c lean (s ee P a g e 1 3 ).
3. C old W ater C om bination
V alve inc orrec tly fitted.
3. C hec k and refit as required.
1. D I R E C T im m ers ion heater
not s w itc hed on.
1. C hec k and s w itc h on.
2. D I R E C T im m ers ion heater
therm al c ut-out has operated.
2. C hec k . R es et by pus hing button.
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. (Fig. 10 Page 13 ).
Chec k operation of indirec t therm os tat.
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 connections
to m otoris ed valve (s ee P a g e 12).
1. INTE R M ITTE N TLY
E x pans ion V es s el c harge
pres s ure has reduc ed below
3.5bar.
1. S ee M aintenanc e s ec tion for re-c harging
proc edure.
2. C O N TIN UA LLY
a. C old W ater C om bination
V alve P res s ure R educ er not
w ork ing c orrec tly .
2a. C hec k pres s ure from C old W ater
C om bination V alve. If greater than 3.5bar
replac e P res s ure R educ er c artridge.
b. E x pans ion V alve s eat
dam aged.
2b. R em ove E x pans ion V alve c artridge.
C hec k c ondition of s eat. If nec es s ary fit
new E x pans ion V alve c artridge.
W ater dis c harges from
T& P Relief V alve
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 .
M ilk y w ater
1. O x y genated w ater.
releas es ox y gen bubbles w hen flow ing. The
m ilk ines s w ill dis appear after a s hort w hile.
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 .
2. Turn off water s upply . R em ove s trainer
1. W ater from a pres s uris ed s y s tem