Chromalox Thermostat PK425 2 User Manual

Installation, Operation  
and  
4
ARR  
(Supersedes PK425-1)  
PK425-2  
161-562792-001  
RENEWAL PARTS IDENTIFICATION  
JANUARY, 1988  
Type ARR Inverse-Action Thermostat  
33/  
8
Specifications – Table A  
21/  
4
Sensing Bulb  
with 7’  
Standard Capillary  
Temperature  
Approx.  
Length  
(In.)  
Max.  
A.C. Rating  
(Amps)  
Range  
(°F)  
Model  
Style  
Dia.(In.)  
3
41/  
169/  
31/  
111/  
4
57/  
8
ARR-215  
60-250  
60-250  
5
/
8
30 Amp  
120-277 Vac  
(1 Pole Res.)  
3
ARR-219  
ARR-515  
ARR-519  
9
5
9
/
16  
32  
18  
FLA-72LRA  
250 Vac  
3
200-550  
200-550  
/
8
4
125 Vac  
120-277 Vac  
(Pilot Duty)  
3
/
16  
4
Models installed in a moisture-resistant enclosure are designated by the suffix “LT” on the  
model number.  
Type ARR  
2 3/8 " Ref.  
C
211  
/
"
L
16  
3
/
4” NPT Conduit Holes  
7
7
/
8
/
8
7
8
2 / "  
71/16”  
Bulb  
47/16”  
Dia.  
51/16”  
Type ARR-LT  
Length  
(Refer to  
Moisture Resistant Model  
Specifications Table A)  
Figure 1  
© 2010 Chromalox, Inc.  
Download from Www.Somanuals.com. All Manuals Search And Download.  
WIRING  
Figure 9  
Figure 6  
Figure 7  
Figure 8  
LT Models:  
11). Note: Electrical connections should be made with gener-  
ous loops of wire — approximately 6” per lead.  
3. Replace cover and tighten screws.  
4. Replace dial knob. (NEMA-I models only).  
5. Note: If load amperage or voltage rating exceeds switch rating,  
a contactor must be used. (See Figure 11) Contactors are avail-  
able as an optional part.  
3
A. Entrance for wiring is provided by two /4” NPT conduit  
holes in end of housing. Wiring to control housing should  
be in moisture-resistant conduit.  
B. Remove cover by removing four hexhead screwbolts. (See  
Figure 8 and 9)  
2. Connect wires according to wiring diagrams (Figures 10 and  
Pilot  
Light  
Pilot  
Light  
Figure 11 — Single phase loads when load exceeds rating of thermostat and  
three phase loads.  
Figure 10 — Single phase loads when load does not  
exceed rating of thermostat.  
CALIBRATION  
Thermometer  
Load (Tank, vat, die or platen)  
Figure 14  
Figure 12  
Figure 13  
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 —  
CAUTION: Hazard of Electric Shock. Extreme care  
should be exercised during calibration adjustments  
because of shock hazard due to exposed electrical  
terminals.  
These controls are factory calibrated to the range indicated on  
the control adjustment knob.  
A. Set dial knob to thermometer temperature reading and pull  
off knob.  
B. While holding the adjusting shaft (B) tightly, turn small  
center adjusting screw (A) with small screwdriver (C) until  
thermostat clicks “off”. (See Figure 14)  
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 12)  
2. With the aid of an accurate thermometer or other temperature  
measuring device, recalibration may be performed within the  
process as in Figure 13.  
For either method the following general calibration procedures  
should be followed.  
1. Remove knob and thermostat housing as per instructions under  
WIRING.  
Note: Always use extreme care not to damage the slot in the  
center adjusting screw.  
C. Each quarter turn of the screw will change the calibration  
approximately 30°F:  
— Clockwise to decrease temperature  
— Counter clockwise to increase temperature  
D. Recheck calibration and repeat process if closer calibration  
is required.  
Download from Www.Somanuals.com. All Manuals Search And Download.  
RENEWAL PARTS IDENTIFICATION  
NEMA-I Models  
LT Models  
015-013696-002  
Base  
152-010971-001  
Cover  
027-05748-001  
Mounting Bracket  
152-025660-004  
Housing  
1
2
027-05748-001  
Mounting Bracket  
119-114623-003  
Packing Gland  
213-018509-002  
Pilot Light  
1
2
Model  
Dial Knob  
Thermostat Sub-Assembly  
ARR-215  
ARR-219  
ARR-515  
ARR-519  
169-046036-001  
169-046036-001  
169-046036-002  
169-04636-002  
300-057437-001  
300-057437-002  
300-057437-003  
300-057437-004  
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  
Download from Www.Somanuals.com. All Manuals Search And Download.  

Blomberg Refrigerator TSM 1541 User Manual
Bosch Appliances Range HDI8054U User Manual
Breadman Bread Maker TR900S_OM User Manual
Briggs Stratton Air Cleaner 44M700 User Manual
Bushnell GPS Receiver 360400BO User Manual
Campbell Hausfeld Thermostat WT6000 User Manual
Canon Printer 2164B002 User Manual
Casio Electronic Keyboard CTK 2080 User Manual
Casio Watch 1827 User Manual
Cerwin Vega Stereo Amplifier CV Series User Manual