Middleby Marshall 20. Burner Assembly, 21. Gas Valve, P/N 60250 September, Checkout

Figure 2-20. Burner Assembly		F.	Adjusting the Minimum Pressure Setting
		1.	Disconnect pressure feedback connection (if appcable).
		2.	Connect a suitable pressure gauge to pipe line or to outlet
			pressure tap of gas control concerned, to measure burner
			pressure (measuring point must be as near to burner as
			possible).
		3.	Disconnect electrical connection of the Moduplus®.
		4.	Energize operator, set control in operation and wait until
			an outlet pressure is recorded on pressure gauge.
		5.	If minimum rate pressure needs adjustment, use a 5 mm
			wrench to turn adjustment screw for minimum pressure
			setting (clockwise to increase or counter-clockwise to
			decrease pressure), until the desired minimum outlet
			pressure is obtained.
		6.	Check if main burner lights easily and reliable at minimum
			pressure.
		7.	Reconnect pressure feedback connection (if appcable).
		8.	Close pressure tap screw.
		G.	Checkout
		After any adjustment, set appliance in operation and observe
		through a component cycle to ensure that burner system com-
		ponents function correctly.
		NOTE: The installer MUST verify oven operation prior to put-
			ting oven into service.
		H.	Maintenance
		It is recommended to check yearly the minimum and the maxi-
		mum setting and readjust them if necessary.
Figure 2-21. Gas Valve
Adjustment Screw (5 mm)	Adjustment Screw
for minimum pressure	(8 mm) for maxi-
setting	mum
	pressure
	setting

19 P/N 60250 September 28, 2012