Riello Start Condens 25 KIS Installer And User Manual page 26

START CONDENS 25 - 29 Kis
Domestic hot water system
• Open the hot and cold water taps and empty the lowest points.
Eliminating the air from the heating circuit and boiler (fig. 14)
• During the initial installation phase, or in the event of extraordinary
maintenance, you are advised to perform the following sequence
of operations:
• With a CH11 wrench, open the manual air vent valve located
above the air distribution box: Connect the tube (supplied with the
boiler) to the valve, so the water can be drained into an external
container.
• Turn on the system filling tap on the hydraulic unit, and wait until
water begins to seep out of the valve.
• Switch on the electricity supply to the boiler, leaving the gas tap
turned off.
• Activate a heat request via the ambient thermostat or the remote
control panel, so that the 3-way valve goes into heating mode.
• Activate a domestic water request by either turning on a tap (in the
case of instantaneous boilers) or via the storage tank thermostat
(for heating-only boilers connected to an external storage tank)
for 30" every minute so the 3-way valve passes from heating to
domestic water and vice versa about 10 times. In this situation,
the boiler will go into alarm mode due to the absence of gas, so it
must be reset every time this happens).
• Carry on with the sequence until only water leaks out of the man-
ual air vent valve, and the air flow has stopped; now close the
manual air vent valve.
• Check the system pressure level is correct (the ideal level is 1 bar).
• Turn off the manual system filling tap on the hydraulic unit.
• Turn on the gas tap and ignite the boiler.
2.11 - First commissioning preparation
Before the ignition and
START CONDENS Kis boiler, it is necessary to:
• Check that the system's fuel and water supply taps are open (fig. 15)
• Check that the gas type and the power supply pressure are those
for which the boiler is designed
• make sure the cap on the vent valve is open
• Check on the display that the pressure of the water circuit when
cold is between 1 bar and 1.5 bar and that the circuit is vented
• Check that the pre-loading of the expansion tank is adequate (see
the Technical data table)
• Check that the electrical connections have been carried out correctly
• Check that the combustion product outlet and air suction pipes
were adequately realised
• Check that the circulator rotates freely because, especially after
long periods of non-operation, deposits and/or debris can prevent
free rotation.
9 Before loosening or removing the closing tap of the circulator,
protect the underlying electrical devices from possible water
leakage.
2.12 - Control prior to commissioning
9 The first time you turn the boiler on and in case of maintenance
work, before using the appliance you must fill the siphon with wa-
ter and make sure that the condensation is evacuated correctly.
Fill the condensation collection siphon pouring 1 litre of water
into the boiler combustion-analysis outlet with the boiler off, and
check that:
• the safety cut-off device is floating
• water is flowing correctly from the discharge pipe out of the boiler
• the condensate outlet connection line is watertight.
If the condensate outlet circuit (siphon and pipes) is working
correctly, the condensation level will not exceed the maximum.
Filling the siphon before using the appliance, and the use of a
safety cut-off device inside the siphon, prevent exhaust gases from
being released into the environment.
Repeat during standard and non-standard maintenance work.
the functional testing of
• Adjust the ambient temperature thermostat to the desired temper-
ature (~20°C) or, if the system is equipped with a programmable
thermostat or timer, ensure that the thermostat or timer is "active"
and set correctly (~20°C)
• A variety of information appears on the display for each power
supply, including the value of the flue gases probe meter (-C- XX -
see "Display and fault codes" - Fault A 09), the boiler will then start
an automatic venting cycle of about 2 minutes
• The display shows the symbol .
To stop the automatic venting cycle, proceed as follows:
the
• Access the electronic board by removing the housing, turning the
instrument panel forwards you and opening the terminal board
cover (Fig. 16)
Then:
• Press the CO button using the supplied screwdriver (fig. 16).
9 Live electrical parts.
To start-up the boiler it is necessary to carry out the following operations:
• power the boiler
• Turn on the gas tap to allow fuel flow
• Adjust the ambient thermostat to the required temperature (~20°C)
• Turn the mode selector to the required position.
2.13 - Checks during and after the first commissioning
Following commissioning, check that the START CONDENS Kis
boiler performs the start-up procedures and subsequent shutdown
properly by acting on the:
• Mode selector
• Calibration of the heating water temperature selector and domestic
hot water temperature selector
• - Requested ambient temperature (by intervening on the ambient
thermostat or programming timer)
Check the domestic hot water operation by opening a hot water tap
with the mode selector both in summer and winter mode and in win-
ter mode with preheating.
Check the full stop of the boiler by turning off the system's main
switch.
After a couple of minutes of continuous operation to be obtained
by turning on the system's main switch, the mode selector () on
(summer) and by keeping open the domestic hot water device, the
binders and manufacturing waste evaporate and it will be possible
to perform:
• The supply gas pressure check
• The combustion check.
Supply gas pressure check
• Turn the mode selector to
• Unscrew the housing fixing screws (A - fig. 9)
• move the housing base forwards and then upwards to unhook it
from the frame
26
MAX
to turn off the boiler