Installation, Operation
4
AR
and
(Supersedes PK407-3)
PK407-4
RENEWAL PARTS IDENTIFICATION
161-562793-001
MARCH, 2004
Type AR Industrial Thermostat
(Three Phase)
2-21/32"
4-3/32"
Bulb
Dia.
Length
(Refer to
Specifications Table A)
Specifications — Table A
Sensing Bulb
with 7’
Standard Capillary
Temperature
Range
Approx.
Max.
A.C. Rating
(Amps)
Dia.
(In.)
Length
(In.)
Model*
AR-2153
AR-2193
AR-5153
AR-5193
(°F)
Style
3
60-250
60-250
200-550
200-550
5
9
5
9
/
8
41/
103/
31/
4
3
/
16
4
30 Amps
@ 277 Volts
3
/
8
4
3
2-21/32"
/
16
9
*Models equipped with Pilot LIght are designated by the suffix “P” on the Model Number.
Models equipped with Knob Cover are designated by the suffix (KC) on the Model Number.
Models equipped with both a Pilot Light and a Knob Cover are designated by the suffix
“PKC” on the Model Number.
Figure 1
© 2010 Chromalox, Inc.
WIRING
6. Connect wires according to wiring diagrams (Figures 8 thru
12). Note: Electrical connections should be made with gener-
ous loops of wire — approximately 6” per lead.
7. Replace cover, tighten screws, replace dial knob and dial knob
cover.
8. Note: If load amperage or voltage rating exceeds switch rating,
a contactor must be used. Contactor and wiring to be supplied
by customer.
ELECTRIC SHOCK HAZARD. Disconect all power to
heater before installing or servicing thermostat.
Failure to do so could result in personal injury or
property damage. Thermostat must be installed by a
qualified person in accordance with the National
Electrical Code, NFPA 70.
1. Electric wiring to heater must be installed in accordance with
local and National Electrical Codes.
CAUTION: Use copper conductors only.
2. Entrance for wiring is provided by two 1/2” conduit holes in end
of base plate.
3. If control is a “KC” model (Knob Cover), remove knob cover
as in Figure 5.
4. Set thermostat knob to OFF position and then remove knob by
lifting knob from shaft. (See Figure 6)
5. Loosen two screws from end of base plate and remove ther-
mostat cover (see Figure 7).
Figure 5
Figure 6
Figure 7
6
5
3
5
3
6
1
2
4
4
2
1
L1
L2
L3
L3
Pilot Light
(Optional)
Pilot Light
(Optional)
L2
L1
Figure 8 — Three-Phase “Y” Load
Figure 9 — Three-Phase Delta Load
Note: One line (terminals 5-6) is controlled by the dial and is on continually whenever the dial is moved from the off position. The other
two lines are thermostatically controlled and cycle with the rise or fall in temperature.
CALIBRATION
Thermometer
Load (Tank, vat, die or platen)
Figure 10
Figure 11
Figure 12
If calibration is required, either one of two methods may be
followed.
1. If accurate measurement standards are not available, the ther-
mostat can readily be adjusted to a known temperature stan-
dard such as boiling water (212°F) (see Figure 10).
2. With the aid of an accurate thermometer or other temperature
measuring device, recalibration may be performed within the
process as in Figure 11.
ELECTRIC SHOCK HAZARD. Disconnect all power
before attempting to calibrate thermostat. Failure
to comply could result in personal injury.
These controls are factory calibrated to the range indicated on
the control adjustment knob.
CALIBRATION (cont’d.)
For either method the following general calibration procedures
B. While holding the adjusting shaft (B) tightly, turn small
center adjusting screw (A) with small screwdriver (C) until
thermostat “clicks” (see Figure 12).
should be followed.
1. Remove knob cover, knob and thermostat housing as per
instructions 3, 4 and 5 under WIRING.
Note: Always use extreme care not to damage the slot in the
2. Replace knob and turn to highest temperature setting.
3. Slowly turn knob and when controls click “off”, compare the
dial reading against the thermometer reading.
4. If they do not agree —
center adjusting screw.
C. Each quarter turn of the screw will change the calibration
approximately 30°F:
— Clockwise to decrease temperature.
A. Set dial knob to thermometer temperature reading and pull
off knob.
— Counterclockwise to increase temperature.
D. Recheck calibration and repeat process if closer calibration
is required.
RENEWAL PARTS IDENTIFICATION
0
k
1
4
2
3
Thermostat
Thermostat
Cover
Model
AR-2153
AR-2153P
AR-2193
AR-2193P
AR-5153
AR-5153P
AR-5193
AR-5193P
Sub-Assembly
300-047848-002
300-047848-002
300-047848-001
300-047848-001
300-047848-004
300-047848-004
300-047848-003
300-047848-003
Dial Knob
Base
169-019604-001
169-019604-001
169-019604-001
169-019604-001
169-019604-002
169-019604-002
169-019604-002
169-019604-002
080-024763-001
080-026032-007
080-024763-001
080-026032-007
080-024763-001
080-026032-007
080-024763-001
080-026032-007
015-013819-001
015-013819-001
015-013819-001
015-013819-001
015-013819-001
015-013819-001
015-013819-001
015-013819-001
Limited Warranty:
Please refer to the Chromalox limited warranty applicable to this product at
1347 HEIL QUAKER BLVD., LAVERGNE, TN 37086
Phone: (615) 793-3900
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