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Honeywell
PROPORTIONING
PRESSURETROLCONTROLLERS
PROPORTIONING PRESSURETROL CONTROLLERS ARE
SERIES 90 MODULATING PRESSURE CONTROLLERS THAT
PROVIDE DIRECT CONTROL OF MODULATING MOTORS OR
VALVES USED ON AUTOMATIC BURNERS OR STEAM HEAT-
ING SYSTEMS.
l
Models available for pressure systems up to 300 psi [2066
l These controllers may be used with steam, air, noncombust-
ible gases, or other fluids noncorrosive to the brass or
bronze (300 psi models) bellows.
l
Wiper on the controller potentiometer moves in response to
pressure changes.
l
D has 2 potentiometers for unison control of 2 motors.
l
has a fixed resistor and a manually-adjusted trim
potentiometer in series with the controller potentiometer; for
special applications in electronic bridge circuits.
l LSlB,D, and F models have an adjustable proportioning
(throttling) range to allow selection of desired pressure control
range.
l
Adjustments are made by screws on top of case.
l
Large, easily-read scaleplates are marked in both customary
(or/in.*, psi, or in. Hg) and metric
l
Steel case has clear plastic cover so that pressure settings
and potentiometer action can be observed.
l
Fitting with
l
Controller can also be surface mounted by screws through
holes (knockouts) in back of case.
NPT threads provides rapid installation.
to 300
0 to 15 psi
5 to 150 psi
0.03 to 1.03
0.07
to
2.07
0 to 103
0.03 to 1.03 MPa
SPECIFICATIONS
TABLE I-MODELS AVAILABLE
0.09 to 0.36
23176CF
9
Yes
Yes
Yes
30 to 110 psi
1.5 to 12 psi
13 to 52 psi
0.21 to 0.76 MPa
10 to 63
0.09 to 0.36
25
225
1
172
1551
psi, or in. Hg) and Metric (kPa, MPa. or mm Hg) units.
‘Includes steam trap (siphon loop).
available with
models have onefixed resistor and one manually-adjustable trim potentiometer in series with thecontroller potentiometer. Varidus combinations of resistance
values and locations of the fixed resistor and trim potentiometer are available. See Table II.
Table II for potentiometer part number.
D.A.
in. BSP-TR internal threads (British Standard Pipe Threads) for mounting.
in.
mm] for Part No.
and
in.
mm] for Part No. 23176CF.
Form Number 65-0059
@Honeywell Inc. 1966
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ADJUSTING SCREW
SCALE
ADJUSTING
MAIN SCALE
SETTING
INDICATOR
1
KNURLED ADJUSTMENT KNOB ON IO TO
TO 2.07
FINISH: Gray.
MAIN SCALEPLATE: Marked in both customary (oz/in.*, psi, or in.
Hg) and Metric
CONTROLLER
POTENTIOMETER(S)
PROPORTIONING RANGE SCALEPlATE
graduated from A to F with a MIN (minimum) value below A. (See
Table Ill for the value of each division.)
MOUNTING MEANS: Fitting on bellows has
SCREW
(external on 0 to 16
or mm Hg) units.
0 to 4 psi, and 0 to 15 psi models;
and F only):
NPT threads
internal on all other models) for mounting on a pipe or steam trap
(siphon loop).
POTENTIOMETER
NOTE: Some models are available with
BSP-TR internal
threads: see Table
-BELLOWS HOUSING
MODELS.
WIPER ARM(S)
PROPORTIONING
SCALEPLATE
ONLY)
PROPORTIONING
INDICATOR
(L91B.D.F ONLY)
PSI
El275
Also can be surface mounted by screws through 2 holes
(knockouts) in back of case.
TABLE
In
Blega
In
B
lnwlegb 380.0
for Oto 15 psi
for Oto 15 psi IOto 103
F RESISTANCE VALUES AVAILABLE
11.2
23367F 3/16
17.6
233676 3/16
[Ot o
103
4.8
470
4.8
870
6.4
2080
models only.
518
2515
and 5to 150 psi
R-B
to 1.03
models.
'Nominal resistancevalues.
FIG.
SETTING AN
PROPORTIONING
CONTROLLER.
MODELS:
potentiometer; nonadjustable proportioning
range.
B-single potentiometer; adjustable proportioning range.
potentiometers allow unison control of 2 motors;
adjustable proportioning range.
F-single potentiometer; adjustable proportioning range;
fixed resistor and manually-adjustable trim potentiometer in
series with controller potentiometer.
ELECTRICAL RATING: 24
POTENTIOMETER ACTION: Wiper moves toward
rise; toward
on pressure fall. Potentiometer is field
on pressure
replaceable.
POTENTIOMETER RESISTANCE: 140 ohms (nominal) for
and D models; see Table II for
F models.
PRESSURE SENSING ELEMENT: Phos-bronze bellows.
MAXIMUM AMBIENT TEMPERATURE: 150 F [66 C].
MINIMUM AMBIENT TEMPERATURE: 32 F [0 C].
ADJUSTMENT MEANS: Screws on top of controller case; knurled
knob for main scale setting on 10 to 300 psi
to 2.07 MPa]
models.
SET POINT: At low pressure end of proportioning
(throttling) range.
WEIGHT: 116.15 oz. [0.88 kg].
adjustable trim potentiometer is
models. With zero pressure on the bellows, adjust the trim potentiometer to
obtain the resistance values listed between terminals
terminals
and W, as indicated.
ohms (nominal)
and
in all
or between
TABLE III-APPROXIMATE VALUE OF EACH DIVISION
(A TO
B TO C. etc.) ON PROPORTIONING (Throttling)
RANGE SCALEPLATE
OPERATING
RANGE
only)
VALUE OF EACH
DIVISION
CUSTOMARY UNITS METRIC UNITS CUSTOMARY UNITS METRIC UNITS
2 to
50 psi 14to
5 to 156
psi
5to
10to300
psi
345
1.03 MPal
1.03
0.07to2.07 MPa
7.8psi
6.7
psi
16.4psi
32.4
0.054
0.046
0.113 MPa
with 7/64 in.
10to
300
psi
0.07to2.07 MPa
13.8psi
0.095 MPa
with
in. pot.)
PRINTED IN U.S.A.
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