Series A36 3- and 4 Stage Thermostats for Refrigeration, Cooling, Heating, Ventilation and Air-conditioning. Feature and Benefits

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1 PSC966 European Refrigeration Controls Catalogue Catalog Section Product Bulletin A6 Series A6 - and 4 Stage Thermostats for Refrigeration, Cooling, Heating, Ventilation and Air-conditioning Introduction Designed for multi-stage thermostatic operation of electrically controlled equipment such as: - packaged liquid chillers - heat pumps - electric duct heaters - computer room airconditioners Description Models are available in 'open' construction for panel mounting. Splash-proof enclosure IP 55 is an accessory. Single knob adjustment moves the entire staging band up and down within the range of the control. The differential on each stage and sequencing between stages are factory set. This permits the OEM to completely engineer the cycling of their equipment without the hazard of field mis-adjustments and erratic sequencing. Note These controls are designed for use only as operating controls. Where an operating control failure would result in personal injury or loss of property it is the responsibility of the installer to add devices or systems that protect against, or warn of, control failure. A6 Three and Four Stage Thermostat Feature and Benefits! Dust-tight SPDT switches Prevents pollution of the contacts by electrostatic influences! Cushion mounted Prevents vibrations and chattering contacts! Operation from a single, liquid filled element! Case compensation standard on all models Easy mounting Assures uniform performance at different ambient conditions 997 Johnson Controls Inc. Catalogue Section

2 A6 Repair and Replacement Repair is not possible. In case of an improperly functioning control, please check with your nearest supplier. When contacting the supplier for a replacement you should state the type/model number of the control. This number can be found on the data plate or cover label. Contact functions Blue White Blue White Blue White Blue White θ > θ > θ > θ 4 > Red Red Red Red θ < θ < θ < θ 4 Fig. Red - white closes on temperature increase. Adjustment codes and tolerances 4. ±.0 6. ±.7.5 ± ± ± ± 0.8 Dial setting B Chiller/refrigeration standard differential.5 ± 0.6. or.4 ± or 5.9 ±.7 Dial seting C Air-conditioning/heating standard differential 4 Dial setting B Range close differential.0 ± 0.7 Dial seting.5 ± ±.0 D Range wide differential 4 Catalogue Section 997 Johnson Controls Inc.

3 A6 Range C Diff. each stage Between stage diff. Type number selection table: Adj. code Bulb 9.5 mm Ø x length (mm) Cap. length (m) stage models Special features -8 to B PVC -8 to B 5.5 PVC -8 to B 5.5 PVC 5 to 5..0 C 40.5 PVC 4 stage models -8 to B 5.5 PVC -6 to B PVC 5 to 5..0 C 40.5 PVC Electrical rating Amp. ~0V Order number 5(5) A6AGA-90 5(5) A6AGA-90 5() A6AGB-90 5(5) A6AGA-90 5(5) A6AHA-905 5(5) A6AHA-907 5(5) A6AHA to D () A6AHB-90-8 to B 5.5 PVC -8 to B PVC 5() A6AHB-904 5() A6AHB to B () A6AHB-909 Enclosure (IP 55) Fig. KIT0N600, enclosure to be ordered separately. 997 Johnson Controls Inc. Catalogue Section

4 4 A6 Accessories (optional) C A B Order no. Dimension (A) Dimension (B) Dimension (C) Internal WEL4A60R 5 mm 7 mm 9.8 mm WEL4A60R 47 mm 9 mm 9.8 mm Fig. Bulb well (brass, copper tube) C. Bushing D. Set screw E. Adapter, /"-4 NPT Fig. 5 Closed-tank connector order number FTGA600R /"-4 NPT ø 5.5 (x) Fig. 4 Duct flange to be used with closed-tank connector FTGA600R. order number T Style b bulb support tube. Packing nut. Washer 4. Packing 5. Adapter, /"-4 NPT 6. Bulb Catalogue Section 997 Johnson Controls Inc.

5 A6 5 Element styles Fig. 6 Style b Can be used with closed tank connector FTGA600R Dimensions (mm) Mounting grommets Ø 4.5 mm. Earth wire Fig Johnson Controls Inc. Catalogue Section

6 6 A6 Notes Catalogue Section 997 Johnson Controls Inc.

7 A6 7 Notes 997 Johnson Controls Inc. Catalogue Section

8 8 A6 CE Conformity Element style Operating ranges and differentials Adjustment Specifications According to low voltage directive and EMC directive Liquid filled, copper bulb Ø 9.5 mm and capillary tube See corresponding type number selection table. Calibrated dial and pointer Max. bulb temperature after 50 C installation 5 C for A6AHB C for A6AHB-909 Max. temperature +55 C Shipping weights Individual pack kg Over pack 4 kg (4 pcs) Contact functions SPDT, snap-acting, enclosed and dust-tight switches The performance specifications are nominal and conform to acceptable industry standards. For applications at conditions beyond these specifications, consult the local Johnson Controls office or representative. Johnson Controls shall not be liable for damages resulting from misapplication or misuse of its products. Johnson Controls International, Inc. Headquarters: Milwaukee, WI, USA European Headquarters: Westendhof 8, 454 Essen, Germany European Factories: Lomagna (Italy), Leeuwarden (The Netherlands) and Essen (Germany) Branch Offices: Principal European Cities. This document is subject to change Catalogue Section Printed in Europe 997 Johnson Controls Inc.