Draining The Heating System; Condensate Siphon - Riello RESIDENCE KIS Installer And User Manual

b
The terminal of the collective pipe must generate an upward air current.
b
Before attempting any operation, disconnect the appliance from the electrical supply.
b
Before assembling, lubricate the gaskets with a non-corrosive glide lubricant.
b
The flue gases discharge pipe should be inclined, if the pipe is horizontal, by 3° towards
the boiler.
b
The number and characteristics of the exhaust ventilation devices which are the real
characteristics of the flue itself.
b
The condensation can flow inside the boiler.
b
The maximum recirculated value allowed in wind conditions is 10%.
b
The maximum permissible pressure difference (25 Pa) between the combustion pro-
ducts inlet and the air outlet of a collective flue can not be exceeded when-1 boiler work
at the maximum nominal heat output and 1 boiler within minimum temperature allowed
by the checks.
b
The collective smoke pipe must be adequate for an overpressure of at least 200 Pa.
b
The collective flue must not be equipped with a wind-proofing device.
At this point it is possible to install the curves and extensions, available as accessories, depen-
ding on the type of installation desired.
The maximum permissible lengths of the flue pipe and the air intake pipe are given in the instruc-
tion manual of the reference device (fig 18a-18b).
With C(10) installation, in any case, report the number of fan speed (rpm) on the label
placed next to the data plate.
Installation currently not available on model 40kW.
3.17 Filling the heating system and eliminating air
Note: the first filling operation must be carried out by turning the filling tap (B - fig. 19) with the
boiler OFF.
Note: each time the boiler is powered up, the automatic venting cycle is carried out.
Note: the presence of a water alarm (40, 41 or 42) does not allow the venting cycle to be carried
out. The presence of a domestic hot water request during the venting cycle interrupts the venting
cycle.
Once the hydraulic connections have been made, fill the heating system as follows:
- Set the boiler to OFF by pressing button 1
- Open the plug of the air vent valve (D - fig. 19) by two or three turns to allow the continuous
bleeding of the air, and leave the valve cap (D - fig. 19) open
- Connect the supplied silicone pipe to the de-aeration tap (A - fig. 19) and take a bucket to
collect any water that may come out after bleeding
- Open the de-aeration tap (A - fig. 19)
- Turn on the filling tap (B - fig. 19)
- Wait until the water comes out continuously from the de-aeration tap (A - fig. 19), then close it
- Wait for the pressure to increase: check that it reaches 1-1.5 bar; then close the system filling
tap (B - fig. 19).
Note: if the mains pressure is less than 1 bar, keep the system filling tap (B - fig. 19) open during
the venting cycle and close it once it has finished.
- To start the vent cycle shut off the electrical power for a few seconds; connect the power again
leaving the boiler OFF. Check that the gas tap is closed.
- At the end of the cycle, if the circuit pressure has dropped, open the filling tap (B - fig. 19)
again to bring the pressure back up to recommended levels (1-1.5 bar)
The boiler is ready after the vent cycle.
- Remove any air in the domestic system (radiators, zone manifolds, etc.) using the bleed
valves.
- Once again check that the system pressure is correct (ideally 1-1.5bar) and restore the levels
if necessary.
- If air is noticed when operating, repeat the vent cycle.
- Once the operations are finished, open the gas tap and ignite the boiler.
At this point it is possible to carry out any heat request.
3.18

Draining the heating system

Before draining, set the boiler to OFF and shut off the electrical supply setting the system's main
switch to "off".
- Close the heating system's taps (if present).
- Connect a pipe to the system discharge valve (C - fig. 19), then manually loosen it to let the
water flow out.
- Once the operations have been completed, remove the pipe from the system discharge valve
(C - fig. 19) and close it again.
3.19 Emptying the domestic hot water circuit
Whenever there is risk of frost, the domestic hot water system must be emptied in the following
way:
- turn off the main water supply tap
- turn on all the hot and cold water taps
- drain the lowest points.
3.20

Condensate siphon

When the boiler is first started the siphon for collecting the condensate is empty.
When eliminating air from the boiler, the siphon fills.
- Slowly open the de-aeration tap (A - fig. 19) and leave it open until the amount of water con-
tained in the siphon reaches the ledge.
- Close the de-aeration tap (A- fig. 19)
- Check that there are no leaks from the SRD device connection zone and that the device
allows the liquid to run off correctly.
- Check that the system pressure has not dropped below 1 bar. If necessary, fill the system.
Repeat this operation during maintenance work.
CHECK THAT THE CONDENSATE DRAIN OUTLET SIPHON CONTAINS WATER, IF IT WAS
NOT FILLED PROCEED AS DESCRIBED ABOVE.
ENGLISH
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