HR3690-2D Manual Rev.A
Contents
1. L2 of the Watlow 981 Temperature Controller when active will turn on the refrigeration solenoid by grounding the negative side of SSR1 At the same time relay SP2 on the CYB20480 module is energized which closes the contact to the Off Delay Timer The timer then applies 115 VAC thru the pressure switches to contactor K2 to turn on the 208 VAC three phase to the compressor Time delay fuses F11 F12 F13 of 25 amp capacity are used for the compressor due to the motor start up current draw If the compressor has lost refrigerant the pressure switches will open disabling contactor K2 The timer will keep the compressor running for a minimum of 3 minutes even if Output 2 has turned off This extends the life of the compressor by assuring proper separation of the Freon and oil in the compressor The flow of Freon is controlled by the solenoid valve controlled by SSR1 When the Freon flow is turned off but the compressor is still running a hot gas bypass valve is opened to allow the Freon to re circulate Dry Air Purge System Optional A Dry Air Purge System is installed on the rear of the chamber to provide a dry envi ronment in the chamber This system requires a connection to a dry compressed air supply of 60 PSIG Alarm System The AC Phase Alarm when lit will disconnect the ground line from the 12 VDC power supply from all circuitry in the chamber This will inhibit all chamber opera tion This alarm indicates that th2. Phase and Blower alarms If the associated LED is on then an alarm condition ex ists The Audible switch allows resetting the Over temp alarm if this alarm condition exists Air Recirculation System An 1500 CFM blower is powered continuously from 208 VAC through fuses F14 and F15 This blower pulls air vertically up through the product the refrigeration system s evaporator coil across the heating coils and then directs the airflow down the back wall of the chamber Heating System The heating circuit is comprised of three 4000 watt nichrome heating elements mounted just above the evaporator coil in the top of the chamber For safety reasons three Solid State Relays SSR2 SSR3 SSR4 are used to control these heating elements Each heater is removable and is fused at 40 amps by fuses FA FB and FC The negative control line to all three SSR s is the L1 output of the Watlow 981 Temperature Controller If Output 1 L1 is on this terminal is grounded and will turn on the SSR s The positive control line to the three SSR s is a switched 12 VDC line This line will be opened by the K1 or K2 relays on the CYB20480 module if an Over temp or Blower alarm condition exists All three legs of the 208 VAC input power will then be removed upon an alarm condition Cooling System The cooling circuit consists of an 6 HP Copeland Compressor System with an associ ated control circuit The system uses ozone safe R 507 refrigerant Output 2
3. slow spin condition will turn on relay K2 on the CYB20480 module A set of con tacts will then turn on the front panel LED indicating the alarm condition along with the Sonalert sounding A second set of contacts performs the same functions as the Over temp Alarm turning off the heaters and the AC to the UUT s This alarm is self resetting ACCUMULATOR RESSOR PCO HIGH PRESSUR TIGLASS MAIN THERMOSTATIC EXPANSION SOLENOID 2 ped pj T e VS LS Tt up S m PN a Strainer BIX Condenser Receiver E ater j Control val ve D 7 gt Cooling Water lut E Li mE 2 Ned HPCO COMP 3e psig 7 c ACCU Iv a DIGITAL LU DIGIT PRES CUTUL PRES CUT DUT 0 PSIG CUT OUT 325 PSIG CUT IN 20 PSIG CUT IN 230 PSIG A 7 em f m i N JQ NC r y CESTA ert ye In Box Temp Pull dawn From 0C to 1AC Liquid Side Hi gh Pres NIE 350 psig 5 L A7 U5 Suction Side Pres NIE 120 Sig adn IE mn Ie At 1 C Box Temp Suction Pres 34 psig Pentaflouroethane 5A B esc Mee Suet dE esr rm 10 30 psic 1 1 1 T FI Nc 5 uj pess loce uction ressure iU SU psigQg EX 9 UNSI bo adt rcd d By pass Mode Suction Temp 37 5 F nom Ged NS D9 kalten Eoenate he tenp Be rS F Cybortronics nc Drendea
4. Cybortronics Inc Model HR3690 Chamber The Model HR3690 is a single bay temperature cycling chamber specifically designed for the commercial electronics environment Specifications for the chamber are as follows Temperature range of 10 C to 80 C 72 000 BTU Refrigeration System e Water cooled condenser requires external water cooling tower e R 507 Ozone Safe Refrigerant e Compressor Inhibit if Refrigerant lost 40 000 BTU Heating System 1500 CFM Air Recirculation with Vertical Airflow design Watlow Model 981 Temperature Controller e 20 step Ramp amp Soak profiling e RS 232 RS 422 or EIA 485 Communications Interface Safety Alarms with LED Display and Audible alert e Over Temperature e Blower Failure Front Panel Display and Control of Alarm Status and UUT Power Control Triple Pane Glass Doors for product visibility Brushed Stainless Steel and Granite Grey Powder Coat Exterior for High Tech appearance AC Power requirements of 208 VAC 3 Phase 60 Amps Section HR3690 Chamber Functional Description Following is a functional description of the various elements of the HR3690 Cham ber These elements consist of the Front Panel the Air Recirculation System the Heating System the Cooling System and the Alarm System Please see Figure 1 1 for a complete schematic of the electrical components of the HR3690 Chamber All serviceable component parts with the exception of the blower and the refrigeration components ar
5. T f N o FB A3T40 208 VAC 1 FA A3T40 3 PHASE k a k AG AC AC AC AC AC NEUTRAL l J di SSR4 SSR3 SSR3 60 AMPS L SSR 75A SSR 75A SSR 75A AC AC SSR1 4 t ii t SSR 40A d i od ej of GROUND FIT pe S RELAY TRM8 TRM8 OVERTEMP AC AC com no E 7 7 K3 CONTROL 3 4 l H3 AGC5 i P1 S i 1 Dehumidifier BLWR Off Delay Timer 2 Controlling SWITCH 12 VDC w Plug Power Pack sw R N o x A F10 AGC10 Load Line RELAY MAIN K1 7 pehumidifier AC Fi 15A BLOWER LS1 a oe F2 15A Di To Optional AC v SONALERT Distribution g Fr 9A oe anes ee RS 232 to Panel E o N o i m WATLOW M RJ 45 JP1 CYB20477A F8 15A P TEMP B o N o 4 4 1 5 T n F9 15A RxD E N JO 9 e J lo 71 GND 13 12 11 0 9 7 6 5 4 3 2 1 Ji 7 5 2 1 BERN EN l n pos mE tit 2 t 3 T As La m iud EIE LA o XF XT Hb qu y Boe m s po ona gig PWR ON OFF l x E E E G TERN A 9 9 16 ER S16 p lo mi AUDIBLE RESET Mom i K3 Ki UESB S2 FRONT PANEL T o LED S AND SWITCHES g CYB20480 MODULE Rev B i On Off Control for External Device Cable on rear of Chamber Fig u re 1 x 1 J3 itch d H By Power On OIf Switch Cybortronics Inc 13845 C Alton Pkwy Switched 12 VDC Irvine CA 92618 By Alarm Condition 1 800 289 8203 itle S BINMO EX HR 3690 MAIN CONTROL SCHEMATIC Size Document Number ev Custpm CYB3690 SCH A ate Tuesday March 18 2008 Shee
6. e 208 VAC connected to the chamber is not con nected in the proper phase The compressor used in the refrigeration circuit cannot be operated unless proper phasing of the AC supply is present Usually just switch ing two of the phases at the AC source to the chamber will correct this problem The AC Phase Monitor on the Control Panel will have its LED lit when it detects proper phasing The Over temp Alarm consists of a Watlow Model LV Limit Control that when acti vated turns on relay K1 on the CYB20480 module This in turn will close contacts to turn on the front panel LED indicating an alarm condition and turn on the Sonalert audible device Another set of contacts will open the 12 VDC line controlling the SSR s used for the heating coils This switched 12 VDC line is also used in the in terface cable to the optional AC Distribution Panel This will turn off the SSR s in this panel and remove all AC from the UUT s removing all heat load from the inside of the chamber and protecting the UUT s from damage The Over temp Alarm is a latching alarm and will stay active until the problem is resolved and the alarm is manually reset The reset switch is a momentary rocker switch located below the Alarm Display on the front panel The chamber is shipped with the Over temp Alarm set to 80 C Access to this control is obtained by raising the hood of the chamber The Blower Alarm is an air flow switch which when activated due to a blower failure or
7. e located under the hood of the chamber This hood is hinged at the top and has two philips screws in the lower left and right corners to allow access to the Power Control Panel the CYB20480 Relay Module and the Watlow Model LV Over temperature Limit Control Front Panel The Front Panel contains the Watlow Model 981 Temperature Controller the UUT Power Control and the Alarm Control Please see Figure 1 3 for the layout of this panel The Watlow Temperature Controller is the brains of the chamber controlling all heating and cooling functions Output 1 L1 of the controller is connected to the heating circuit Output 2 L2 is connected to the cooling circuit The fourth output L4 is the RS 232 communications interface The L4 LED will flash whenever serial data is being sent from the controller Please see Figure 1 4 for a quick guide to the Watlow operation All further details of the Watlow can be found in the Watlow Series 982 User s Manual Data communications interfacing and commands can be found in the Data Communications with the Watlow Series 988 Family of Controllers User s Guide The UUT Power Control consists of a switch to control the On Off state of the AC to the UUT outlets in the optional CYB20440 AC Distribution Panel See Section III for a description of this unit if this option is installed An LED shows the status of this switch The Alarm Control consists of LED s showing the status of the Over temp AC
8. rd Thanage 5 ame 7 TITLE Standard Charge 8 251lbs o 68 E T Refrigeration Schematic MATERIAL DRAWING NO HR3690 RS REV A FINISH SCALE DATE 94 29 03 SHEET of 2 3 4 5 F13 TRM25 COMPRESSOR F12 TRM25 FASES ABUS 4KW Heater 4KW Heater 4KW Heater 1 F11 TRM25 rar l cst cs2 L 3 Phase 2 2 7 Line Monitor Hi Side Pres Low Side Pres PHASE2 Red 1 f K2 MAIN Compressor Bypass 3 POWER Solenoid Solenoid INPUT LED On When Phase OK PHASE1 Black F4 AGC5 FC A3T40
9. t b of 1 1 2 3 4 4 5 6 7 8
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