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
MOUNTING STEM
CAPILLARY	KNOCKOUT PLATE
	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, then follow such recommendations. If none are offered the following are suggested locations.

For high limit service, the control should be located in the hottest part of the boiler. This is usually near the top of the boiler. A high limit control should not be in the same section of the boiler that contains the heat exchanger that supplies domestic hot water.

For low limit or operating service, the control should be so located that it responds to the temperature of that section of the boiler that heats domestic hot water.

When used as a circulator control, it may be located near the boiler outlet or riser.

When used on a combination low limit and circulator control, it should be located the same as suggested for low limit service.

To remove the well from the control, loosen set screw in the large nut, then slide the well off which exposes 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. 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.

RED BLUE

Refer to the wiring diagram supplied by the boiler or

COMMON

OPEN ON RISE

OF TEMPERATURE

burner manufacturer, or to the suggested circuits included with the primary control. The information below shows the terminals to use for the various applications.

WHITE

CLOSE ON RISE OF TEMPERATURE

Limit Control: When used as either a high limit control or as a low limit control, use the open-on-rise terminals, (red and blue).

This control has a single-pole, double-throw, snap-action switch. The top left-hand terminal (red) is the common terminal. The top right-hand terminal (blue) has open-on- rise switch action. The bottom center terminal (white) has close-on-rise switch action.

Circulator Control: When used as a circulator control, use the close-on-rise terminals, (red and white). Combination Low Limit and Circulator Control: For this application, all 3 terminals are used. The wiring diagram on the next page shows a typical circuit for a hot water system having a boiler with tankless domes- tic coil.

1131 specifications

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