JOHNSON CONTROLS成立于1885年，通过全方位的系统和数字解决方案，让客户的建筑更智能。JOHNSON CONTROLS旨在改变人们生活，工作，学习和娱乐环境，从优化建筑性能到提高安全性和舒适度。
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Specification
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Description
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Product switch action
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SPDT
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Pressure connection
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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
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Ambient storage conditions
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Temperature: -40°C to 60ºC (-40°F to 140ºF)
Humidity: 0% to 95% R.H. non-condensing
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Enclosure
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Type 1: cast aluminum
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Dimensions (HxWx D)
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Type 1 enclosure: 122 mm x 80 mm x 53 mm
(4.80 in. x 3.15 in. x 2.09 in.)
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Approximate shipping weight
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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)
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Compliance
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cULus Listed; UL 60730, File SA516
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P78 for dual pressure applications
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Purpose of control
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Pressure operating control: automatic reset controls
Pressure cut-out: manual reset controls
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Construction of control
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Electromechanical
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Number of cycles
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Automatic 30,000 cycles
Manual reset 6,000 cycles
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Method of mounting control
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Independently-mounted control
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Type 1 or Type 2 action
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Automatic: Type 1; Type 1.C; micro-interruption
Manual reset: Type 2
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Pollution degree
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Category 3
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Heat and fire resistance category
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N/A
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Rated impulse voltage
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4,000 V
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Ball pressure temperature
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N/A
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Field wiring rating
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90°C (194°F)
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Maximum overpressure
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LP: 20 bar (290 psi)
HP: 33 bar (479 psi)
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Cover screw torque requirements
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Tighten enclosure screws to: 1.1–1.4 N·m (10–12 in·lb)
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JOHNSON CONTROLS控制器P78系列介绍
P78 系列压力控制器主要设计用于商业制冷和空调应用的高低压切断控制、抽空控制、冷凝器风扇循环和容量控制。
这些控件可用于多个压力范围，并与大多数常用制冷剂兼容。 它们也可用于其他非腐蚀性流体应用。 控件还提供多种不同的电气额定值和单刀双掷 (SPDT) 开关配置。
用于双压力应用的 P78 系列控制器主要设计用作商业制冷和空调应用中的高压和低压组合控制器。
P78 Series Pressure Controls are designed primarily for high and low pressure cut-out control, pump-down control, condenser fan cycling, and capacity control on commercial refrigeration and air-conditioning applications.
These controls are available in several pressure ranges and are compatible with most common refrigerants. They may also be used on other non-corrosive fluid applications. Controls also are available in several different electrical ratings and single-pole, double-throw (SPDT) switch configurations.
The P78 Series Controls for dual pressure applications are designed primarily for use as combination high and low pressure controls on commercial refrigeration and air-conditioning applications.
JOHNSON CONTROLS控制器P78系列其他常用型号：
JOHNSON CONTROLS P78LCA-9300
JOHNSON CONTROLS P78LCA-9400
JOHNSON CONTROLS P78LCA-9500
JOHNSON CONTROLS P78LCA-9700
JOHNSON CONTROLS P78LCW-9300
JOHNSON CONTROLS P78LCW-9302
JOHNSON CONTROLS P78LCW-9800
JOHNSON CONTROLS P78LCW-9801