Starting Up The Boiler - PENSOTTI PCH 34B-H Instruction Manual

4.5 Starting up the boiler

Once the system has been filled,
proceed as follows:
Check that the exhaust flue is free
of obstructions and correctly
connected to the boiler;
Switch on the power supply to the
appliance;
Open the gas isolation valve;
Place switch 1 in the ON position
(see 2.7 "Control Panel"), after a
few seconds the circulating pump
will start to run;
Use button 6 to set the D.H.W, HEAT or D.H.W./HEAT function. The
symbols will light up (fixed light) to indicate that the boiler is
working;
The automatic ignition system will then light the burner. This
operation is repeated for 3 times. It may however be necessary to
repeat the operation in order to eliminate all the air from the gas
pipes. To repeat the operation, wait approximately three minutes
before re-attempting to light the boiler. To reset the boiler Switch off
switch 1 (see 2.7 "Control Panel") and switch it back on again and
repeat the lighting procedure;
With the boiler ignited, if the system still emits noises, the operations
must be repeated until all the air has been removed from the gas
piping;
Check the water pressure in the system. If the pressure has fallen,
introduce water into the appliance until the code "H2O" disappears
on the display and the pressure gauge reads in the Green section
of the gauge (14.5 psi = 1 bar) on completion;
Check gas pressure at gas valve inlet pressure tap. SEE Fig 2. Set
gas pressure to proper level at the regulator (Refer to section 2.1
Technical Data). Gas pressure adjustments must be performed while
the appliance is in "Flue Test Function" mode (maximum firing rate).
Allow the boiler to fire in the heat mode. Press and hold the "S"
button until "07" flashes on the screen. Do NOT make any
adjustments to the gas valve itself.
Unscrew the plug and insert an analyser in the exhaust sampling
point PF, SEE Fig. 1, (air intake manifold is missing in the drawing to
provide a clear view of the V screw) to check the CO2 value. Make
sure that the value complies with that reported in table 1 while the
appliance is in "Flue Test Function" mode;
If the CO2 value does not correspond to the specified value, adjust
screw V (see fig. 1) on the venturi clockwise to reduce the CO2
value or counter-clockwise to increase it
REGULATION INSTRUCTIONS
Table n°1
Gas type
Natural Gas - G20
Liquid Propane Gas - G 31
;
Inlet Pressure Tap
CO %
2
9.18
10.3
PF
V
Fig 1.
Fi
g.
1
Fig 2.
40