Chromalox PK425-2 User Manual
Installation, operation, Type arr inverse-action thermostat, Renewal parts identification
(Supersedes PK425-1)
PK425-2
ARR
161-562792-001
JANUARY, 1988
4
and
Installation, Operation
RENEWAL PARTS IDENTIFICATION
Type ARR Inverse-Action Thermostat
© 2010 Chromalox, Inc.
Specifications – Table A
Sensing Bulb
with 7’
Standard Capillary
Temperature
Approx.
Max.
Range
Length
A.C. Rating
Model
(°F)
Style
Dia.(In.)
(In.)
(Amps)
ARR-215
60-250
5
3
/
8
4
1
/
4
ARR-219
60-250
9
3
/
16
16
9
/
32
ARR-515
200-550
5
3
/
8
3
1
/
4
ARR-519
200-550
9
3
/
16
11
1
/
4
Models installed in a moisture-resistant enclosure are designated by the suffix “LT” on the
model number.
Length
(Refer to
Specifications Table A)
Bulb
Dia.
2 / "
11 16
2 / " Ref.
3 8
2 / "
7 8
Type ARR
Type ARR-LT
Moisture Resistant Model
Figure 1
30 Amp
120-277 Vac
(1 Pole Res.)
18
FLA-72LRA
250 Vac
125 Vac
120-277 Vac
(Pilot Duty)
2
1
/
4
”
3
3
/
8
”
5
7
/
8
”
3
/
4
” NPT Conduit Holes
4
7
/
16
”
5
1
/
16
”
7
1
/
16
”
7
/
8
”
7
/
8
”
CL