Boiler Start Up Ignition; Circulation Pump - Immergas VICTRIX TERA 24 PLUS Instruction Booklet And Warning

1.27 BOILER START UP IGNITION .

To commission the boiler (the operations listed
below must only be performed by quali ed per-
sonnel and in the presence of sta only):
- check that the internal system is properly sealed
according to the regulations in force;
- ensure that the type of gas used corresponds to
the boiler settings (the type of gas appears on the
display on rst electrical supply voltage, or by
checking the relative parameter "G");
- check connection to a 230V-50Hz power mains,
correct L-N polarity and earthing connection;
- Check that there are external factors that may
cause the formation of fuel pockets;
- switch the boiler on and ensure correct ignition;
- make sure that the gas ow rate and relevant
pressure values comply with those given in the
manual (Par. 3.20);
- ensure that the safety device is engaged in the
event of gas supply failure and check activation
time;
- check the intervention of the main switch
located upstream from the boiler and in the
boiler;
- check that the intake and/or exhaust terminals
(if tted) are not blocked.
- Carry out the ue test.
e boiler must not be started up even if only
one of the checks should be negative.

1.28 CIRCULATION PUMP.

e boilers are supplied with a variable speed
circulator pump.
In the central heating mode, the following op-
erating modes are available and can be selected
from the "P.C.B. programming" menu.
N.B.: the ∆T(A3) can be controlled compatibly
with the characteristics of the central heating
system and of the boiler.
• Proportional head (A3 = 0): the circulator
speed varies according to the power emitted
by the burner, the greater the power the greater
the speed.
• ∆T Constant (A3 = 5 ÷ 25 K): the pump speed
varies to maintain the ∆T constant between the
system ow and return according to set value
K (A3 = 15 Default).
• Fixed: by setting parameters "A1" and "A2" at
the same value (5/6 ÷ 9), the pump operates at
constant speed. For the boiler to work properly,
it is not allowed to drop below the minimum
value set out above.
In domestic hot water mode, the circulator pump
always runs at full speed.
Pump release. If, a er a prolonged period of
inactivity, the circulation pump is blocked, turn
the motor sha using a screwdriver. Take great
care during this operation to avoid damage to
the motor.
By-pass Regulation (Part. 21 Fig. 34).
leaves the factory with the bypass open.
If necessary, the by-pass can be regulated to
system requirements from minimum (by-pass
closed) to maximum (by-pass open). Adjust
using a at-head screwdriver. Turning clockwise
opens the bypass and anticlockwise closes it.
21
e boiler