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 Issue 4//00 Series A6 - and 4 Stage Thermostats for Refrigeration, Cooling, Heating, Ventilation and Air-conditioning I ntroduction Designed for multi-stage thermostatic operation of electrically controlled equipment such as: - packaged liquid chillers - heat pumps - electric duct heaters - computer room airconditioners D escription Models are available in 'open' construction for panel mounting. 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. N ote 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 Cushion mounted Operation from a single, liquid filled element Case compensation standard on all models Prevents pollution of the contacts by electrostatic influences Prevents vibrations and chattering contacts Easy mounting Assures uniform performance at different ambient conditions 00 Johnson Controls Inc. Catalogue Section

2 A6 Issue 4//00 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 6. ±.7 4. ±.0.5 ± ± ± 0.8. ± 0.6 Dial setting B Chiller/refrigeration standard differential Dial setting B Range close differential 5.7 or 5.9 ± ±.0.5 ± ± or.4 ± ±.0 Dial seting C Air-conditioning/heating standard differential Dial seting D Range wide differential Catalogue Section 00 Johnson Controls Inc.

3 A6 Issue 4//00 Range C Diff. each stage Betwee n stage diff. Type number selection table: Adj. code Bulb 9.5 mm Ø x length (mm) Cap. length (m) stage models Special features Electrical rating Amp. ~0V Order number -8 to B PVC armoured 5(5) A6AGA-90-8 to B 5.5 PVC armoured 5(5) A6AGA-90-8 to B 5.5 PVC armoured 5() A6AGB-90 5 to 5..0 C 40.5 PVC armoured 5(5) A6AGA-90 4 stage models -8 to B 5.5 PVC armoured 5(5) A6AHA to B PVC armoured 5(5) A6AHA to 5..0 C 40.5 PVC armoured 5(5) A6AHA to D () A6AHB-90-8 to B 5.5 PVC armoured 5() A6AHB to B PVC armoured 5() A6AHB to B () A6AHB Johnson Controls Inc. Catalogue Section

4 4 A6 Issue 4//00 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 FTGA-600R /"-4 NPT ø 5.5 (x) Fig. 4 Duct flange to be used with closed-tank connector FTGA-600R. order number T Style b bulb support tube. Packing nut. Washer 4. Packing 5. Adapter, /"-4 NPT 6. Bulb Catalogue Section 00 Johnson Controls Inc.

5 A6 Issue 4//00 5 Element styles Fig. 6 Style b Can be used with closed tank connector FTGA-600RR Dimensions (mm) Mounting grommets Ø 4.5 mm. Earth wire Fig Johnson Controls Inc. Catalogue Section

6 6 A6 Issue 4//00 N otes Catalogue Section 00 Johnson Controls Inc.

7 A6 Issue 4//00 7 N otes 00 Johnson Controls Inc. Catalogue Section

8 8 A6 Issue 4//00 CE Conformity Element style Operating ranges and differentials Adjustment Max. bulb temperature after installation Max. temperature +55 C S pecifications 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 50 C 5 C for A6AHB C for A6AHB-909 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: European Customer Service Center: European Factories: Branch Offices: This document is subject to change Milwaukee, WI, USA Westendhof, D-454 Essen, Germany Lomagna (Italy), Leeuwarden (The Netherlands) and Essen (Germany) Principal European Cities. Printed in Europe Catalogue Section 00 Johnson Controls Inc.