FLOOR STANDING WATER BOILERS
MOD. SIMPLEX
n.1460080EN 07-2009
8
Operating
The
SIMPLEX
boiler is only designed to supply hot water for room heating. After pressing the
ON
-
OFF
button to turn on the boiler and set the required temperature on the thermostat, the burner starts and
after the temperature set on the anti-condensation low point thermostat (
TM
= 55°C), the heating
circulating pump starts.
When the preset temperature is reached, the burner stop until new heat is requested.
N.B.
If the boiler exceeds 100 °C, the safety thermostat cuts in and stops the burner. To
resume operation, unscrew the thermostat cap and press
RESET
. If this occur again, ask for the
service by a qualified personnel.
4 MAINTENANCE
The boiler must be cleaned at least once every season. Turn on the main power switch and release
the on/off button. Remove the burner and plate together with the lining. Open the front door, the rear
stack and the cast iron plate covering the rear element.
Clean the horizontal flue gas conduits, the combustion chamber. The fumes range cleaning it’s more
important, only millimetres of soot increase the flue gas outlet temperature at least 30°C decreasing
one percentage point of thermal efficiency.
Water properties
The chemical and physical properties of the water in the circuit and refill water are the basic elements
for safe trouble-free operation of the system. It’s known that bad water quality causes inconveniences
to the entire system, the most common and serious inconvenience being the formation of scale on the
heat exchange areas. Due to their considerably low heat conductivity, scale deposits, although of a
small thickness, create insulation of the wall that are not cooled by the circulating water and are thus
subjected to overheating, and this provokes uneven expansion or localized thermal shocks.
Water treatment is required when:
water system are very extensive
water available has a high hardness index
for any reason whatsoever, the system needs to be partially or fully emptied and then filled up again
Water properties for filling and topping up are:
Appearance
clear
Total hardness
max 20 °F
Free oxygen
max 0.005 mg/l
Organic substances
max 0.5 mg/l
pH
min. 8.5
