White Rodgers 11B18 Convertible Controls Cont, Extending Capillary, Installation, Wiring

CONVERTIBLE CONTROLS CONT.

NOTE

To convert from Vertical to Horizontal model, remove Knockout Plug and Plate. Remove Hex Nut (inside con- trol) and swing capillary upward into back knockout. Place Knockout Plate beneath Hex Nut on back of control and tighten Hex Nut (inside control). If bottom knockout is not used for wiring, insert Knockout Plug.

HEX NUT
MOUNTING STEM	KNOCKOUT PLUG
CAPILLARY	KNOCKOUT PLATE
BULB

Convertible Control converted to Vertical Model.

EXTENDING CAPILLARY

Some controls have excess stored capillary which may be extended for use with an extended shank well. Use reason- able care when straightening and forming the capillary.

With the capillary fully extended, the bulb should slide all the way to the end of the well.

INSTALLATION

If the boiler manufacturer recommends a control location, follow such recommendations. If none is offered, the following information gives suggested locations.

When used for high limit service, the control should be installed in the riser close to the boiler, or in a boiler tapping that is near the top or hottest section of the boiler. If the boiler is also used to heat domestic hot water, make sure that the high limit control is not located in the section of the boiler that contains the heat exchanger or piping for domestic hot water.

When used for low limit or operator service, the control should be located near that section of the boiler that

contains the heat exchanger or piping for domestic hot water.

To remove the well from the control, loosen the set screw in the large nut, then slide the well off to expose the bulb. Screw the well into the proper tapping. Slide the bulb back into the well, making sure that the bulb enters the well as far as it will go and tighten the set screw.

CAUTION

Do not dent or bend the bulb as this will prevent it from fitting into the well properly.

WIRING

All wiring should be done in accordance with local and national electrical codes and ordinances.

If the boiler or burner manufacturer recommends a wiring diagram, then follow such recommendations.

If none is offered, these diagrams show suggested cir- cuits.

HIGH

LIMIT

	LINE			THERMOSTAT
			INTERMITTENT IGNITION
GND	HOT
			OIL BURNER CONTROL
	FUSED		LIMIT
	LINE				STACK
			CONTROL
	SWITCH
				T T 1 2	3 4
Used as high limit			TRANS
control with			MOTOR
oil burner control
		DIAPHRAGM
			GAS VALVE
	THERM PILOT TRANS			Used as high limit
				control with

THERMOSTAT

Used as high limit control with Silent Knight gas valve with plug-in pilot

THERMOSTAT diaphragm gas valve

SILENT KNIGHT

GAS VALVE

2	AUX	TRANSFORMER
	3	TO
TH	TR
		LINE
1	4
		COIL	LIMIT	AUTOMATIC
			CONTROL
		PLUG-IN		PILOT

PILOT 2

TRANSFORMER

TO

LINE

IF AUTOMATIC PILOT IS NOT USED, CONNECT A JUMPER BETWEEN THE PILOT TERMINALS