P77 and P78 Series technical specifications - PENN Controls - LIT-12012399 - P77AAA - P77BCA - P77BEA - P78LCA - P78MCA - Electromechanical Pressure Control - P77 Single Pressure Control - P78 Dual Pressure Control

P77 and P78 Series Controls for Single and Dual Pressure Applications Product Bulletin
Brand
PENN Controls
Product name
P77 Single Pressure Control
P78 Dual Pressure Control
Document type
Product Bulletin
Document number
LIT-12012399
Revision date
2020-10-28
Language
English
Table 1. P77 Series electrical ratings
Volts AC 50/60 Hz UL60730
24 120 208 240
– Primary contact Secondary contact Primary contact Secondary contact Primary contact Secondary contact
Horsepower – 1 0.33 1 0.75 1 1
Full load amperes – 16 7.2 9.2 7.6 8 8
Locked rotor amperes – 96 43.2 55.2 45.6 48 48
Resistive amperes 16 16 8 10 8 10 8
Pilot duty VA 125 720 720 720 720 720 720
Note: When the primary contact is A–C, the secondary contact is A–B. When the primary contact is A–B, the secondary contact is A–C.
Table 2. P78 Series electrical ratings
Volts AC 50/60 Hz UL60730
24 120 208 240
– Primary contact Secondary contact Primary contact Secondary contact Primary contact Secondary contact
Horsepower – 1 0.33 1 0.75 1 1
Full load amperes – 16 7.2 9.2 7.6 8 8
Locked rotor amperes – 96 43.2 55.2 45.6 48 48
Resistive amperes 16/8 16 8 10 8 10 8
Pilot duty VA 125/125 720 720 720 720 720 720
Note: The primary contact is A–C; the secondary contacts are A–B and A–D.
Table 3. P77 Series applications technical specifications
Specification Description
Product switch action SPDT
Pressure connection 7/16-20 UNF for 6 mm (1/4 in. SAE external flare fitting), or

914 mm (36 in.) capillary with 6 mm (1/4 in.) flare fitting
Ambient conditions Temperature: -40°C to 60ºC (-40°F to 140ºF)

Humidity: 0% to 95% R.H. non-condensing
Enclosure Type 1: cast aluminum
Dimensions

(H x W x D)

 Type 1 enclosure: 88 mm x 80 mm x 53 mm

(3.48 in. x 3.15 in x 2.09 in.)
Approximate shipping weight Individual pack: (Type 1 enclosure): 0.5 kg (1.1 lbs)

Bulk pack: (Type 1 enclosure in multiples of 35 controls): 19 kg (41.88 lbs)
Compliance cULus Listed; UL 60730, File SA516
Table 4. P78 Series applications technical specifications
Specification Description
Product switch action SPDT
Pressure connection 7/16-20 UNF for 6 mm (1/4 in.) flare nut, or

914 mm (36 in.) capillary with 6 mm (1/4 in.) flare nut
Ambient storage conditions Temperature: -40°C to 60ºC (-40°F to 140ºF)

Humidity: 0% to 95% R.H. non-condensing
Enclosure Type 1: cast aluminum
Dimensions

(H x W x D)

 Type 1 enclosure: 122 mm x 80 mm x 53 mm

(4.80 in. x 3.15 in. x 2.09 in.)
Approximate shipping weight Individual pack: (Type 1 enclosure): 0.7 kg (1.55 lbs)

Bulk pack: (Type 1 enclosure in multiples of 24 controls): 24.5 kg (54.01 lbs)
Compliance cULus Listed; UL 60730, File SA516
Table 5. P77 for low pressure applications UL Conformity Declaration information
Information Description
Purpose of control Pressure operating control: automatic reset controls

Pressure cut-out: manual reset controls
Construction of control Electromechanical
Number of cycles Automatic: 30,000 cycles

Manual reset: 6,000 cycles
Method of mounting control Independently-mounted control
Type 1 or Type 2 action Automatic: Type 1; Type 1.C; micro-interruption

Manual reset: Type 2
Pollution degree Category 3
Heat and fire resistance category N/A
Rated impulse voltage 4,000 V
Ball pressure temperature N/A
Field wiring rating 90°C (194°F)
Maximum overpressure 20 bar (290 psi)
Cover screw torque requirements Tighten enclosure screws to: 1.1–1.4 N·m (10–12 in·lb)
Table 6. P77 for high pressure applications UL Conformity Declaration information
Information Description
Purpose of control

Pressure operating control: automatic reset controls

Pressure cut-out: manual reset controls
Construction of control Electromechanical
Number of cycles

Automatic: 30,000 cycles

Manual reset: 6,000 cycles
Method of mounting control Independently-mounted control
Type 1 or Type 2 action

Automatic: Type 1; Type 1.C; micro-interruption

Manual reset: Type 2
Pollution degree Category 3
Heat and fire resistance category N/A
Rated impulse voltage 4,000 V
Ball pressure temperature N/A
Field wiring rating 90°C (194°F)
Maximum overpressure 33 bar (479 psi)
Cover screw torque requirements Tighten enclosure screws to: 1.1–1.4 N·m (10–12 in·lb)
Table 7. P78 for dual pressure applications UL Conformity Declaration information
Information Description
Purpose of control

Pressure operating control: automatic reset controls

Pressure cut-out: manual reset controls
Construction of control Electromechanical
Number of cycles

Automatic 30,000 cycles

Manual reset 6,000 cycles
Method of mounting control Independently-mounted control
Type 1 or Type 2 action

Automatic: Type 1; Type 1.C; micro-interruption

Manual reset: Type 2
Pollution degree Category 3
Heat and fire resistance category N/A
Rated impulse voltage 4,000 V
Ball pressure temperature N/A
Field wiring rating 90°C (194°F)
Maximum overpressure LP: 20 bar (290 psi)

HP: 33 bar (479 psi)
Cover screw torque requirements Tighten enclosure screws to: 1.1–1.4 N·m (10–12 in·lb)

The performance specifications are nominal and conform to acceptable industry standards. For application at conditions beyond these specifications, consult the local Johnson Controls office. Johnson Controls shall not be liable for damages resulting from misapplication or misuse of its products.