Ariston ST 100 ProTech User Manual

2. GENERAL
INFORMATION
2.1 Guarantee
This manual is an integral and essential part of the product. It should be kept
with the appliance so that it can be consulted by the user and/or authorised
personnel.
Please read carefully the instructions and notices about the appliance
contained in this manual, as they provide important information regarding the
safe installation, use and maintenance of the cylinder.
Failure to do so may invalidate the guarantee.
When installing and servicing the cylinder, Ariston ThermoUK Ltd
recommend the use of protective clothing i.e. gloves.
The Ariston range of unvented cylinders come with Varying guarantees
depending on the model of cylinder. The guarantee periods offered with
each model of cylinder are as follows:
ST Range
Classico HE Range
Primo HE Range
10 Years tank
2 Years electrical components
5 Years tank
2 Years electrical components
25 Years tank
2 Years electrical components
Note: The guarantee is subject to the cylinder being installed and serviced
annually by a competent person as per the servicing instructions in Section
5.6 of this manual. For units with the ProTech anti-corrosion device it must
be ensured that this is connected and operating correctly (green LED only).
2.2 How THE Appliance
Works
The immersion heater(s) are controlled through a thermostat which senses
the water temperature. The operating temperature can be pre-set by
adjusting the spindle in the head of the thermostat. In addition to the
thermostat there is a thermal cut-out incorporated if the thermostat fails and
the water temperature rises too high. Once the cut-out operates it can only
be re-set manually after the fault has been rectified.
Indirect models have dual thermal controls. In addition to the above there is
a separate cylinder thermostat and thermal cut-out for controlling each
indirect circuit. Again the thermal cut-out operates if the cylinder thermostat
fails, by disconnecting the live feed (call for hot water) from the programmer.
ITI/ITD/ITSI models have a stainless steel tank and therefore need no
protection against corrosion.
STD/STI models have an enamelled steel tank and therefore are supplied
with magnesium anodes to prevent corrosion of the cylinder tank. It is
imperative that the top anode is checked during the annual service and if
found to be corroded both anodes should be replaced. Failure to do so
could invalidate the warranty of the tank.
i-. ^
The Wall-hung (ST) units utilise the ProTech anti-corrosion system
(electronic anode). This prevents an electrolytic reaction between the tank
and dissimilar metals. The ProTech system shows if it is operating correctly
(green LED) or incorrectly (red LED). In the event that the red LED lights
(even with the green light still showing), it is imperative that a service agent
is contacted immediately as continued use with the ProTech system in this
state could invalidate the warranty on the tiank.
The factory fitted temperature & pressure relief valve at the top of the
cylinder is a safety device to back-up the thermostat(s) and thermal cut-
out(s). It works by sensing an excess in water temperature or pressure and

Ariston ST 100 ProTech Specifications

General

Brand	Ariston
Model	ST 100 ProTech
Category	Water Heater
Language	English