Ariston CONTRACT STD 150 Instructions For Installation Manual - Page 14
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2.11
E
D
LECTRICAL
Should the Economy 7 system not to be used, a separate 13 amp supply to
IAGRAM
each element will be required. Through a double pole fused isolating switch
having a contact gap of at least 3mm on each pole.The immersion heater
shall be installed with 85°C rubber insulated hofr-sheathed flexible cords
complying with Table 8 of BS 6141: 1991. Make the connection(s) to the
immersion heater(s) as per F
litre models consult the wiring diagram on the reverse of the inspection
panel.
Single Element
L1
N
F
. 2.12
IG
L1
N
L2
N
F
. 2.13
IG
The thermostat(s) on the immersion heater(s) should be adjusted to trip at
60°C. This is the ideal temperature to prolong element life in hard water
areas. Scale on the sheath builds up more rapidly at temperatures above
this causing the element to overheat and premature failure can occur. Higher
temperatures without additional controls would result in scalding.
In addition to the thermostat the thermal cut-out will switch power off to the
element should the thermostat malfunction, causing an excessive rise in
water temperature. The thermal cut-out can be reset manually after the fault
has been corrected.
. 2.12 and F
IG
THERMAL
CUT-OUT
THERMAL
THERMOSTAT
CUT-OUT
THERMAL
THERMOSTAT
CUT-OUT
14
. 2.13. For High Capacity 500
IG
THERMOSTAT
ELEMENT
3 kW
240V~
DAY ELEMENT
3 kW 240V~
NIGHT ELEMENT
3 kW 240V~
ECONOMY 7