Verona WALL HUNG GAS BOILER Checking the burner ignition, Adjustment of the useful c.h. output

• Turn the boiler OFF.

• Open the gas valve outlet pressure test point 15 (figure 15.5) and connect the gauge.

• Turn the boiler ON positioning the function selector B in the position shown in figure 15.7 and ensure that the room

Figure 15.7

• Loosen screws D and remove the service panel (figure 15.8).

B

• Turn the boiler OFF.

• Open the gas valve outlet pressure test point 15 (figure 15.5) and connect the gauge.

• Turn the boiler ON positioning the function selector B in the position shown in figure 15.7 and ensure that the room thermostat is set to “heat demand”.

15. Commissioning Cont.

D

D

D

Figure 15.8

15.6 Checking the burner ignition:
• Watch the gauge and			+
			RISC
	check to see if the		+
	ignition pressure		ACC
	registerd corresponds		ON
	to the values given in		1 2 3 4
	the Technical Data.
	Turn off the boiler and		OFF
	reignite it by turning		Figure 15.9
		•	Adjust the gas
	the function selector
			pressure at the
	B to the 0 position
			injectors to the value
	and then back to that
			indicated in the tables
	indicated in figure
			of section 2. By
	15.7.
			rotating the device
•	Repeat this process
			clockwise the
	two to three times
			pressure increases.
	leaving 30 second
		•	After the adjustment
	intervals between
			operations bring the
	each ignition. Check
			selector 3 of figure
	the ignition pressures
			15.9 back to the
	and visually check
			normal position (ON).
	that the burner lights
		•	Reassemble the
	uniformly and in a
			service panel.
	controlled manner.
		• Close the gas valve
• To carry out the
			outlet pressure test
	adjustment move the
			point 15 (figure 15.5).
	function selector 3 to
		•	Reassemble the front
	the OFF position (Fig.
			pannel of the case.
	15.9) and use the
		Important: after the
	device (ACC).
		checks all of the test
		points must be sealed.
15.7 Adjustment of the useful c.h. output:
	thermostat is set to	•	Adjust the gas
	“heat demand”.		pressure at the burner
• Loosen screws D and			to the value according
	remove the service		to the useful c.h.
	panel (figure 15.8).		output wanted (Tab.
• To carry out the			15.1).
	adjustment use the	•	Reassemble the
	adjustment device		service panel.
	(RISC) with the help	•	Close the gas valve
	of a screwdriver.		outlet pressure test
• By rotating the device			point 15 (figure 15.5).
	clockwise the	•	Reassemble the front
	pressure increases.		pannel of the case.

RIVA HEAT ONLY MANUAL – REV A 33