4
T4031A,B,P; T6031A,B REFRIGERATION TEMPERATURE CONTROLLERS
60-2177—3
Fig. 2. 107324A bulb holder.
To install duct:
1. Make a hole in duct wall to admit sensing bulb into
holder.
2. Using holder as template, mark and drill mounting holes.
3. Break off bulb holder to required length. (Be sure holder
is long enough to hold sensing bulb away from duct wall
and in freely circulating air.)
4. Place capillary tubing in bulb holder channel, with bulb at
inner end of holder. Pinch together top edges of channel
segments.
5. Insert assembled bulb and holder into duct, and fasten to
duct wall with screws supplied.
Tank Installation
The sensing bulb can be inserted directly into a tank using a
compression fitting; or the bulb can be inserted into an immer-
sion well (order separately), which is screwed into a tank or
boiler.
Select a location where liquid of average temperature can
circulate freely around the sensing bulb.
Using Compression Fitting (Fig. 3)
1. Drain system. Screw boiler plug into properly sized and
threaded boiler or pipe tapping.
2. Place packing nut on capillary tubing.
3. Slide sensing bulb completely through boiler plug.
4. Place composition disc and the four slotted brass
washers on capillary tubing.
5. Slide assembly into boiler plug and tighten packing nut.
6. Refill system and check for leaks. Neatly coil excess
capillary tubing.
Using Immersion Well (Fig. 4)
1. Drain system. Screw the well into threaded fitting.
2. Refill system and check for leaks.
3. Insert sensing bulb into well until it bottoms.
4. Fit bulb retaining clamp over immersion well flange and
capillary tubing, and tighten screw.
M8970
Fig. 4. Immersion well installation.
Cold Room Installation
Locate the bulb in freely circulating air in the controlled area or
on the suction side of a refrigerant line, and secure the bulb in
position.
Wiring (Fig. 5)
All wiring must comply with local electrical codes and ordi-
nances.
Two knockouts are provided, one at the top and one at the
bottom of the case for 1/2 in. conduit. Follow the wiring
instructions furnished with the heating or cooling system. For
replacement, make sure the new control is wired into the
system to operate the same as the old control.
M4494
1
2
1
2
B TERMINAL ON T6031 CONTROLLERS ONLY.
AT SETPOINT MINUS DIFFERENTIAL SETTING.
TEMPERATURE FALL
B-R MAKES
TEMPERATURE RISE
R-W MAKES
B
R
W
Fig. 5. Wiring terminals on T4031 and T6031 temperature
controllers.
COMPOSITION
PACKING
(SLIT)
BOILER PLUG
THREAD
SLOTTED WASHERS
ASSEMBLED
IN PAIRS:
PACKING NUT
M4492
SENSING
BULB
Fig. 3. Compression fitting installation.
BULB RETAINING
CLAMP
IMMERSION WELL
WELL SPUD
CAPILLARY
M4493
