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HVAC
PRESSURE CONTROLS
HEAD PRESSURE FAN CyCLING CONTROL SINGLE POLE HIGH PRESSURE
HEAD PRESSURE FAN CyCLING
P70 SERIES SINGLE POLE LOW PRESSURE
MICRO-SET FOR R-12, R-22, R-500, R502
Locke#
Model# Switch
Action
Range PSIG
(kPa)
Differential
(PSI)
Pressure
Connector
Limited
Knob
Adjustment
Max. Bellows
Pressure
PSIG (kPa)
Ship.
Wt.
Lb.
L4453
P70AB12 Close High
Open Low
12" to 80
(-40 to 345)
Min. 5 (34)
Max. 35 (241)
36" Cap. w /
1/4" Flare Nut
Cutoff
500 (3447)
2.4
"ALL RANGE" FOR R-12, R-22, R-500, R502
L4454
P70AB1
1/4" Male
Flared Conn.
Cutoff
2.3
L4455
P70AB2 Close High
Open Low
20" to 100
(-68 to 690)
Min. 6 (41)
Max. 50 (345)
36" Cap. w/
1/4" Flare Nut
Cutoff
325 (2241)
2.4
L4456
P70CA1
36" Cap. w/
1/4" Flare Nut
None
2.3
Locke#
Model#
Switch
Action
Range
PSIG
(kPa)
Differential
(PSI)
Pressure
Connector
Limited
Knob
Adjustment
Max. Bellows
Pressure
PSIG (kPa)
Ship.
Wt. Lb.
L4451
P70AA118 Close High
Open Low
100 to
400 (690
to 2758)
Min. 35
(241) Max.
200 (1379)
36" Cap.
with 1/4"
Flare Nut
None
500 (3447)
2.3
SINGLE POLE DUAL PRESSURE
These controls are supplied less mounting brackets. If brackets are required, order kit number
BKT38A-600R which contains five 271-51 angle mounting brackets w/ screws.
Shipping Weight:
3.0 Lbs.
TO ORDER:
Specify Kit Number only.
L4460
L4461
MICRO-SET FOR R-12, R-22, R-500, R502
Locke#
Model# Switch
Action
Range
PSIG
kPa)
Differential
(PSI)
Range
Differential
Pressure
Connector
Limit Knob
Adjustment
Max.Bellows
Press. PSIG
(kPa)
Ship.
Wt.
Lb.
L4460
P70LB6 SPST
12" to
80
(-40 to
345)
Min. 5 (34)
Max. 35 (241)
100 to
425
(690 to
2930)
Under 300PSIG, 55 PSI:
Over 300PSIG, 65 PSI
36" Cap. w/
1/4" Flare
Nut
Cutout
500 Low 475
High (3447
Low) (3275
High)
3.1
"ALL RANGE" FOR R-12, R-22, R-500, R502
L4461
P70LB1 SPST
20" to
100
(-68 to
690)
Min. 6 (41)
Max. 50 (345)
Lockout Man.
Reset
100 to
425
(690 to
2930)
Under 300 PSIG, 55
PSI:Over 300 PSIG, 65
PSI Lockout (Requires
Manual Reset)
36" Cap. w/
1/4" Flare
Nut
Cutout
325 Low 50
High (2241
Low) (3103
High)
3.1