Chromalox Thermostat PK405 18 User Manual

®
Chromalox  
SERVICE REFERENCE  
Installation Instructions  
DIVISION  
SALES  
4
SECTION AR  
and  
(Supersedes PK405-17)  
161-049287-001  
REFERENCE  
PK405-18  
RENEWAL PARTS IDENTIFICATION  
DATE  
MARCH, 2004  
AR (Single Phase) Industrial Thermostat  
Table A – Specifications  
Sensing Bulb  
Temperature  
Range  
Approx. Capillary  
Maximum  
A.C. Rating  
(Amps.)  
NEMA I  
Model*  
Dia.  
(In.)  
Length  
(In.)  
Length  
(Ft.)  
3-3/8”  
(˚F)  
Style  
3-1/8”  
AR-115  
AR-115A  
AR-115C  
AR-214  
AR-214D  
AR-215  
AR-215A  
AR-219  
AR-219D  
AR-514  
AR-515  
AR-515A  
AR-519  
AR-519D  
AR-715  
AR-715D  
AR-719  
7
2
0–100˚F  
5
0.375  
4-3/8  
12  
7
10 Amp.  
480 Vac  
4
5
0.250  
0.375  
5-5/32  
4
30 Amp.  
15  
7
120-277 Vac  
5-7/8”  
60–250˚F  
2
250VA  
7
120-277 Vac  
(Pilot Duty)  
9
4
5
0.188  
0.250  
0.375  
10-3/4  
7-5/16  
3-5/8  
15  
7
7
200–550˚F  
300–700˚F  
2
7
9
0.188  
11-1/2  
15  
7
5
9
0.375  
0.188  
3-11/16  
12  
15  
7
NEMA-I Model  
*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.  
Models installed in a moisture resistant enclosure are designated by the suffix “LT” on the Model  
Number.  
Pilot Light nor Knob Cover available on LT models.  
2-21/32"  
C
L
3/4” NPT Conduit Holes  
7/8” 7/8”  
4-3/32"  
7-1/16”  
2-21/32"  
Bulb  
4-7/16”  
Dia.  
AR-LT  
5-1/16”  
Length  
Moisture Resistant Model  
(Refer to Specifications Table A)  
Figure 1  
© 2010 Chromalox, Inc.  
 
WIRING  
Figure 6  
Figure 7  
Figure 8 Figure 9  
Figure 5  
LT Models –  
Note: Electrical connections should be made with generous loops  
of wire – approximately 6” per lead.  
A. Entrance for wiring is provided by two 3/4” NPT conduit  
holes in end of enclosure. Wiring to control enclosure should  
be in moisture-resistant conduit.  
3. Replace cover and tighten screws.  
4. Replace dial knob and dial knob cover. (NEMA-I models only).  
5. Note: If load amperage or voltage rating exceeds switch rating, a  
contactor must be used (see Figure 14). Contactors are available  
as an optional part.  
B. Remove cover by removing four hexhead screwbolts (see  
Figures 8 and 9).  
2. Connect wires according to wiring diagrams (Figure 11 thru 15).  
Pilot  
Light  
Pilot Light  
Pilot  
Light  
Line  
Load  
1
Load  
2
1
Line  
1
2
3
4
3
4
2
3
4
Line  
Load  
Single Phase  
Load  
Two Circuit  
Line  
Single Phase  
Figure 11  
Figure 12  
Figure 13  
Line  
Pilot  
Light  
Three Phase  
When Load  
Does Not  
Exceed  
Three Phase  
1
1
And Single  
Phase When  
Load Exceeds  
Rating of  
2
3
4
Control  
Voltage  
Line  
2
3
4
}
Rating of  
Thermostat.  
Pilot  
Light  
Thermostat.  
Load  
Figure 14  
Figure 15  
WIRING  
C
Screwdriver  
Thermometer  
B
Adjusting  
Shaft  
A
Load (Tank, vat, die or platen)  
Adjusting  
Set Screw  
Figure 16  
Figure 17  
Figure 18  
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 –  
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.  
If calibration is required, either one of two methods may be fol-  
lowed:  
A. Set dial knob to thermometer temperature reading and pull off  
knob.  
B. While holding the adjusting shaft (B) tightly, turn small cen-  
ter adjusting screw (A) with small screwdriver (C) until ther-  
mostat clicks “off” (see Figure 18).  
Note: Always use extreme care not to damage the slot in the center  
A. If accurate measurement standards are not available, the ther-  
mostat can be readily adjusted to a known temperature stan-  
dard such as boiling water (212˚F) (see Figure 16).  
B. With the aid of an accurate thermometer or other temperature  
measuring device, recalibration may be performed within the  
process as in Figure 17.  
adjusting screw.  
C. Each quarter turn of the screw will change the calibration  
approximately 30˚F:  
– Clockwise to decrease temperature  
– Counterclockwise to increase temperature  
D. Recheck calibration and repeat process if closer calibration is  
required.  
For either method, the following general calibration procedures  
should be followed:  
1. Remove knob cover, knob and thermostat housing as per instruc-  
tions 3, 4 and 5 under WIRING.  
 
RENEWAL PARTS IDENTIFICATION  
LT-Models  
NEMA-I Models  
3
4
152-025660-004  
Enclosure  
027-057548-001  
Mounting Bracket  
119-114623-003  
Pack Gland  
1
2
3
4
Thermostat  
Thermostat  
Cover  
Model  
Sub-Assembly  
Thermostat Base  
015-013819-001  
015-013819-001  
015-013819-001  
015-013819-001  
015-013819-001  
015-013819-001  
015-013819-001  
015-013819-001  
015-013819-001  
015-013819-001  
015-013819-001  
015-013819-001  
015-013819-001  
015-013819-001  
015-013819-001  
015-013819-001  
015-013819-001  
Knob  
AR-115  
AR-115A  
AR-115C  
AR-214  
AR-214D  
AR-215  
AR-215A  
AR-219  
AR-219D  
AR-514  
AR-515  
AR-515A  
AR-519  
AR-519D  
AR-715  
AR-715D  
AR-719  
300-048518-005  
300-048518-012  
300-048518-019  
300-048518-001  
300-048518-026  
300-048518-010  
300-048518-013  
300-048518-002  
300-048518-022  
300-048518-003  
300-048518-011  
300-048518-014  
300-048518-004  
300-048518-027  
300-048518-006  
300-048518-029  
300-048518-007  
080-024763-001  
080-024763-001  
080-024763-001  
080-024763-001  
080-024763-001  
080-024763-001  
080-024763-001  
080-024763-001  
080-024763-001  
080-024763-001  
080-024763-001  
080-024763-001  
080-024763-001  
080-024763-001  
080-024763-001  
080-024763-001  
080-024763-001  
169-019605-002  
169-019605-002  
169-019605-002  
169-019604-001  
169-019604-001  
169-019604-001  
169-019604-001  
169-019604-001  
169-019604-001  
169-019604-002  
169-019604-002  
169-019604-002  
169-019604-002  
169-019604-002  
169-019605-001  
169-019605-001  
169-019605-001  
Limited Warranty:  
Please refer to the Chromalox limited warranty applicable to this product at  
http://www.chromalox.com/customer-service/policies/termsofsale.aspx.  
1347 HEIL QUAKER BLVD., LAVERGNE, TN 37086  
Phone: (615) 793-3900  
 

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