Wolseley

PENN Controls Products Catalog

Issue link: https://boomart.uberflip.com/i/1442607

Contents of this Issue

Navigation

Page 69 of 367

Off-Cycle defrost Shut off the refrigeration system for defined defrost time interval and frequency. You can also start or stop a manual only defrost off-cycle. On/Off temperature adjustment Select the temperature values at which the relay turns on and off and automatically define the mode of operation. Switch-activated temperature setback Shift the On/Off temperature by an adjustable setback. When a user-supplied switch closes the binary input control circuit, temperature setback is enabled. Adjustable anti-short cycle delay (ASd) Select the minimum time the output relay remains off before the next on-cycle. By selecting this minimal time, you can avoid short cycling, hard starts, and nuisance overload outages on compressors and other inductive applications. Adjustable sensor offset Adjust the displayed temperature to the actual sensed temperature. Optional restricted adjustment mode Restrict the On/Off adjustment to your defined temperature range. Sensor failure mode Run the control continuously in the event of a sensor or sensor wire failure or to shut it down. Backlight brightness level Adjust the brightness of the backlighting of the LCD screen. The backlight brightness level is applied during normal operation. When you set up or adjust the parameters, the LCD automatically goes to the brightest level. Ordering information Contact your nearest Johnson Controls or PENN distributor or sales representative to order sensors, mounting hardware, and other accessories to install the A421 Controls. Contact your local Johnson Controls or PENN representative for more information on options available for high- volume purchase models with specific application requirements. Selection charts Table 72: A421 Series Standard Electronic Temperature Control Product code Description A421ABD-02C Line -Voltage Type 1 Electronic Temperature Control with Off-Cycle Defrost Timer: Type 1 (NEMA), IP20 standard enclosure for DIN rail and surface-mount applications. Rated for 120/240 VAC. Includes timer for On/Off defrost cycle control. Includes A99BB-200C temperature sensor with 6.6 ft (2.0 m) cable. A421AED-01C Line -Voltage Type 4X Electronic Temperature Control with Off-Cycle Defrost Timer: Type 4X (NEMA), IP66 standard enclosure for surface- mount applications. Rated for 120/240 VAC. Includes timer for On/Off defrost cycle control. Includes A99BB-25C temperature sensor with 9 7/8 in. (0.25 m) cable. A421AED-02C Line -Voltage Type 4X Electronic Temperature Control with Off-Cycle Defrost Timer: Type 4X (NEMA), IP66 standard enclosure for surface- mount applications. Rated for 120/240 VAC. Includes timer for On/Off defrost cycle control. Includes A99BB-200C temperature sensor with 6.6 ft (2.0 m) cable. Table 73: A99 Temperature Sensors Product code 1 Description A99BA-200C Positive temperature coefficient (PTC) Temperature Sensor: Standard probe 2 in. (5.1 cm) with 6.6 ft (2.0 m) shielded polyvinyl chloride (PVC) cable; ambient operating temperature range: -40ºF to 212ºF (-40ºC to 100ºC) A99BB-25C PTC Temperature Sensor: Standard probe 2 in. (5.1 cm) with 9 7/8 in. (0.25 m) PVC cable; ambient operating temperature range: -40ºF to 212ºF (-40ºC to 100ºC) A99BB-200C PTC Temperature Sensor: Standard probe 2 in. (5.1 cm) with 6.6 ft (2.0 m) PVC cable; ambient operating temperature range: -40ºF to 212ºF (-40ºC to 100ºC) A99BB-300C PTC Temperature Sensor: Standard probe 2 in. (5.1 cm) with 9.8 ft (3.0 m) PVC cable; ambient operating temperature range: -40ºF to 212ºF (-40ºC to 100ºC) 70 Refrigeration Products Catalog

Articles in this issue

Archives of this issue

view archives of Wolseley - PENN Controls Products Catalog