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 |
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| OCKOUT PLUG |
MOUNTING STEM | KN | ||
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CAPILLARY | KNOCKOUT PLATE | ||
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BULB |
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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 manufacturer of the boiler recommends a control location, follow such recommendations.
If none are offered, locate the control at the top of the boiler near an outlet pipe or in the outlet pipe.
To remove the well from the control, loosen the 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 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 manufacturer recommends a wiring diagram, then follow such recommendations. If none is offered, these diagrams show suggested circuits.
LINE VOLTAGE | TYPE | TYPE |
THEMOSTAT | 11B05 | 11B05 |
HOT
LINE
N
FAN
MOTOR
Used as Hot Water Control to prevent unit heater fan from operating until coils are warm.
HOT
LINE
N
CIRCULATOR
MOTOR
Used as Hot Water Control to start and stop the circulator.
SETTING THE CONTROL
CONTROLS WITH ADJUSTABLE DIFFERENTIAL
The movable indicator points to the temperature at which the contacts close. The fixed indicator points to the temperature at which the contacts open. The difference between these two indicators is the differential.
To set the control:
1.Use a screwdriver in the adjusting slot (A) on the front of the control to turn the dial so that the fixed indicator
(B) points to the temperature at which the contacts will open.
2.Turn the differential adjusting screw (C) until the movable indicator (D) points to the temperature at which the contacts will close.
“B” Fixed indicator
“C” Differential adjusting screw
“D” Movable indicator 
(cut-in point)
“A” Adjusting slot
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