Heatrae Sadia R 45 PLUS 3KW, Installation, Operation And Maintenance Manual

Page: 10 / 40

10
the heater returns to the correct level in a controlled
manner.
4.2.3 Electronic Control
All heater functionality is controlled electronically which
allows the following additional features to be supported:
`
Automatic Water Level Control
`
Real-time user access to the heater for setup and
adjustment
`
Automatic Pasteurization Control
4.2.3.1 Water Level
In normal operation the water heater manages the
level of the stored water inside the unit automatically,
maintaining the correct level and ensuring optimum
performance from the heater. In the unlikely event of a
system failure, the heater has safety features to ensure
that it s huts down in a safe manner, see troubleshooting
section on page 25.
4.2.3.2 Auto Pasteurization
The water heater will automatically heat the stored water
temperature to 60°C for one hour should the stored
water set point temperature be inadvertently set to 55°C
or less for a period of 23 hours. This pasteurization
function ensures that the risk of developing Legionella
within the water heater is minimized.
WARNING
`
The stored water temperature during
this function exceeds that which is
safe for hand wash requirements, if
the stored hot water is used for hand
washing then an appropriate water
tempering device must be fitted at the
point of use.
WARNING
`
With the addition of this feature,
the obligation to control Legionella
under the provisions laid down by L8,
Legionnaires’ disease: The control
of legionella bacteria water systems.
Approved Code of Practice and
guidance, within the hot water supply
network pipe work are not negated. It is
still the responsibility of the end user or
contacted support agency to manage
this requirement.
4.2.3.3 Fault Condition Indication
In the unlikely event that a fault with the water heater
develops an error code is displayed on the control
PCB at the bottom of the unit. This is intended to aid
fault analysis and helps to reduce the heater downtime
whilst the fault is analysed. See the troubleshooting
section of this document for further information. One
of six error codes will be displayed using four LED,s
should a fault develop, see page 25.
4.3 Standard delivery
The units are supplied to site in one package. Within
the box there will be a set of fitting instructions wall
mounting and fixing brackets and breather pipe
assembly.