Preliminary Checks; Initial Start-Up - Riello RESIDENCE HM Series Instructions For The User

5 COMMISSIONING
5.1

Preliminary checks

The first start-up must be carried out by personnel from the relevant
Technical Assistance Centre. Before starting up the boiler, check:
ƒ that the data of the supply networks (electricity, water, gas) corre-
spond to the label data
ƒ that the flue gas evacuation and air intake pipes comply with current
regulations and respect the maximum permissible lengths
ƒ that conditions for regular maintenance are guaranteed if the boiler is
placed inside or between items of furniture
ƒ the seal of the fuel adduction system
ƒ that the fuel flow rate corresponds to values required by the boiler
ƒ that the fuel supply system is sized to provide the correct flow rate to
the boiler, and that it has all the safety and control devices required
by current regulations
ƒ that the circulator rotates freely because, especially after long periods
of inactivity, deposits and/or debris can prevent free rotation
ƒ that the trap is completely filled with water, otherwise refill it (see
chapter "5.2 Initial start-up").
5.2

Initial start-up

On first start-up, in the event of prolonged non-use and in the event of
maintenance work, it is essential to proceed as described in the following
paragraphs before putting the appliance into operation.
At the first start-up, the calibration procedure (GAC) is also recommen-
ded to allow the boiler to reach its optimal performance.
5.2.1 Condensate trap filling
Fill the condensate collection drain-trap, pouring about 1 litre of water
into the boiler combustion analysis outlet, and check that:
- the water leaving the boiler via the discharge tube is running off cor-
rectly
- the seal on the condensate discharge connection line.
Proper functioning of the condensate drainage circuit (drain-trap and
pipes) requires that the condensate level does not exceed the maximum
level (max).
High efficiency mode (SERVICE)
The function is managed by parameter P708, which is set to 0 by default
(function not active); if P708=1 the function is activated on the first power
on action or after 60 days of non-use (electrically powered boiler). In this
mode the boiler, for 60 minutes, limits the power in heating to a minimum
and the maximum temperature in DHW to 55°C. Activating the combus-
tion analysis temporarily disables this function.
During execution, the function is shown on the display with the mes-
sage HEM and, if P105=1, with a scrolling message "HIGH EFFICIENCY
MODE".
5.3 Venting cycle
Turn the main system switch ON.
Every time the boiler is energised, a 6-minute vent cycle is performed.
The display shows:
To interrupt the vent cycle press
b
When the vent cycle is running all heat requests are inhibited
except for DHW requests when the boiler is not in OFF.
The cycle can also be interrupted by a DHW request, if the boiler is not
OFF.
.
5.4 Manual calibration procedure (GAC)
The GAC procedure, which is useful to calibrate the gas valve and
combustion control system, is mandatory following: gas conversion - gas
valve replacement - board replacement - fan replacement - cleaning of
primary heat exchanger and/or burner - replacement of flame detection
electrode (ionisation) - replacement of burner insulation panel -
modification of suction/exhaust pipes.
The GAC procedure must also be carried out on first start-up. If this pro-
cedure is not carried out in the time required, the boiler will still be safe
however it may be limited in performance and may also process com-
bustion control signals.
b
The procedure must be performed with the casing closed.
Any repetition of the GAC that is not successfully completed leaves the
system in the "GAC not completed" condition.
The system alternates (except when signalling ALARM, INFO and PRO-
GRAMMING) the normal display with the word GAC and spanner icon
as a reminder that the GAC is required and that therefore the boiler may
have limitations in its operation.
A A
B B
- Power on the boiler electrically and wait for the vent cycle to run (see
paragraph "5.3 Venting cycle").
- If it is set to OFF, set SUMMER mode with key 1.
- Generate a DHW request of 5 litres per minute or more. Although there
are no limitations on the part of the system, except those foreseen by
the ALARMS supervision, it is still advisable to carry out this test with
an incoming domestic hot water ("AFS" domestic cold water) lower
than 15°C. If the boiler has an external water tank, drain the water
tank, with the boiler in the OFF state, so that the accumulation in the
water tank is reasonably cold.
- Wait until the flame symbol appears on the display.
- Access the parameters (see procedure indicated in Chapter 10 "Set-
ting Passwords, Access and Changing Parameters").
- Select menu P2 using keys C or D and confirm using key A.
- Select parameter P206 using keys C or D and confirm using key A.
Note: the parameter is not available when there is no heat request.
- Set P206 = 1 using key C to activate the GAC function.
The display shows GAC flashing and a waiting phase of about 1 minute
begins, after which calibration begins. During this phase, the word "GAC"
blinks, alternating with fan speed, for a duration of approximately 2-5
minutes.
12
1 1 2 2 3 3
C C
D D