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CONVERTIBLE CONTROLS CONT.
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.
NOTE
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
Convertible Control converted to Vertical Model.
KNOCKOUT PLATE
BULB
CAPILLARY
MOUNTING STEM
HEX NUT
KNOCKOUT PLUG
back into the well, making sure that the bulb enters the
well as far as it will go and tighten the set screw.
Do not dent or bend the bulb as this will prevent
it from fitting into the well properly.
CAUTION
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.
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
(cut-out point)
“C” Differential
adjusting screw
“D” Movable indicator
(cut-in point)
“A” Adjusting
slot
CIRCULATOR
MOTOR
Used as Hot Water Control to prevent unit heater fan from
operating until coils are warm.
Used as Hot Water Control to start and stop the circulator.
FAN
MOTOR
TYPE
11B05
TYPE
11B05
LINE VOLTAGE
THEMOSTAT
HOT
LINE
N
HOT
LINE
N