Aldi V4 & V5 2012 2013 V1.1 5/23/2014 Aldi Control Techniques SK Series VFD & Hussmann MX Series MicroChannel Condenser Equipment Operation Component Orientation Control Wiring Programming and Start Up Procedure
Hussmann Krack MX Condenser Layout and Control Wiring CT VFD Sections equipped with normallyopen refrigerant isolation valves Isolation valve SV 3 energizes when fan MC3 is shut off Isolation valve SV 5 energizes when fan MC5 is shut off 2
Hussmann Krack MX Condenser 2 Condenser Applications With Ambient Changeover and Capacity Based Split Fan Control Summer/Winter Condenser Operation Summer Condenser Split Fan Operation Winter Condenser Split Fan Operation Coil 3 Coil 2 Coil 1 Split Fan Control Determined by Condenser Capacity Fans ON >85% / OFF<20% Split Fan Control Determined by Condenser Capacity Fan ON >90% / OFF<20% ON<50 Fans M1, M2, & M3 controlled and operational Fans M4, M5, & M6 off during split fan mode Fan M1 controlled and operational Fan M2 off during split fan mode ON >55 / OFF<50 CONDENSER WNTR CONDENSER SUMR Fans M1 & M2 controlled and operational Fans M3, M4, M5, & M6 and coils 2 & 3 shut down All 6 fans controlled and operational All 3 coils open 3
CT VFD Panel with Overload Relay Full Interior View Key Control Components Overload relay included in VFD panels shipped prior to May 2013 SK Series Variable Frequency Drive With cover removed Panel Thermostat Operates door mounted cooling fan RFI/EMI Input Filter Attenuates the radio frequency interference and electromagnetic interference associated with variable frequency drives Disconnect Switch Rotary style line voltage 3 ph Option Remote Display and Keypad Not Used Unplug Cabinet Heater Includes integrated thermostat Field Control Terminal Strip Primary fuse block 3 ph Modbus Interface with cables loosely secured (prefer a dedicated mount) Controls Power Transformer 230VAC to 120VAC Contactors (2VSC) & (2BPC) Mechanically Interlocked Overload Relay Load side 3 ph 4
CT VFD Panel without Overload Relay Full Interior View Key Control Components Overload relay no longer installed in VFD panels shipped May 2013 and after SK Series Variable Frequency Drive Modbus Interface Secured to side of VFD enclosure RFI/EMI Input Filter Attenuates the radio frequency interference and electromagnetic interference associated with variable frequency drives Panel Thermostat Operates door mounted cooling fan Disconnect Switch Rotary style line voltage 3 ph Primary fuse block 3 ph Controls Power Transformer 230VAC to 120VAC Field Control Terminal Strip Contactors (2VSC) & (2BPC) Mechanically Interlocked Cabinet Heater Includes integrated thermostat 5
CT VFD Panel Wiring Diagram O/L Overload relay removed from VFD panels shipped May 2013 and after 6
Control Techniques SK VFD Under the Cover Modbus 485 Plug in at the VFD ONLY USE The CT Supplied RJ 45 cable Unused Remote Display Cable Do not plug into VFD CT Factory error No jumper allowed between B4 & B5 for Modbus CT Drive Remove this jumper! 7
Field Control Terminal Strip Safety Interlock Wiring Terminals 100, 112, 113, & 114 are provided for field installed safety interlocks. If no customer provided safety interlocks are to be used, a jumper wire should be installed between terminals 100 and 114. The VFD will not operate without a connection between these terminals. Modbus 485 plug in at the drive ONLY USE The CT Supplied RJ 45 cable Unused remote display cable Do not plug into VFD CT Factory error No jumper allowed between B4 & B5 for Modbus CT Drive Remove this jumper! Factory Installed Jumper Wire If the factory installed jumper wire is missing, install a jumper wire between terminals 100 and 114 8
CT VFD Panel with Overload Relay Contactors and Overload Components Field installed VFD output wiring to be terminated at the bottom of the overload relay. O/L Overload Relay for fans protection redundant to fuses and can be eliminated Mechanically interlocked contactors 2VSC VFD Contactor 2BPC Bypass Contactor 2BPC N.C. (120VAC) Contactor Auxiliary Contact 2VSC N.C. (120VAC) Contactor Auxiliary Contact 2BPC N.C. (24VDC) Contactor Auxiliary Contact wired FROM Drive [B2] and [B4] to Enable the drive when 2BPC is De Energized 9
CT VFD Panel without Overload Relay Contactors and Overload Components Mechanically interlocked contactors 2BPC N.C. (24VDC) Contactor Auxiliary Contact wired FROM Drive [B2] and [B4] to Enable the drive when 2BPC is De Energized 2VSC VFD Contactor 2BPC Bypass Contactor 2BPC N.C. (120VAC) Contactor Auxiliary Contact 2VSC N.C. (120VAC) Contactor Auxiliary Contact Field installed VFD output wiring to be terminated at the bottom of 2BPC contactor. The wires should be doubled up with the factory installed wires. 10
Hussmann Condenser Control Panel Interior View Component Layout MF88 Board Transformer Hussmann Contactors Transformer Emerson MF88 Power Service Valve & Drop Leg Transducer Field Control Terminal Strip *Board addresses may vary at each store. Stores with equipment shipped May 2013 and after will typically be addressed as Input #5/Output #6. Stores with equipment shipped prior to May 2013 will typically be addressed as Input #6/Output #8. 11
CT Drive Panel Field Control Terminal Strip Field installed wires land here per the wiring diagram: TO terminals 210, 211, & 213 on the field terminal strip in the Hussmann Condenser Control Panel 12
Hussmann Condenser Control Panel Field Control Terminal Strip Field installed control wires land here per the wiring diagram: TO the MF88 Relay #8 FROM the field control terminal strip in the CT VFD panel 13
Hussmann Condenser Control Panel MF88 I/O Board RO Point #8 NO C NC Field installed wires land here per the wiring diagram: From terminals 210, 211, & 213 on the field terminal strip in the Hussmann Condenser Control Panel Relay Fuse Energized Status Lamp 14
Hussmann Condenser Control Panel Board/Point Assignments FACTORY MOUNTED BOARD CONDENSER LOCATION Confirm/Correct Inputs Wired to These Exact Points Confirm/Correct Exact Hussmann Fan Numbers As Shown Here 8 CHANNEL INPUT BD #*, 8 CHANNEL RELAY BD #* INPUT POINT DEVICE DESCRIPTION CA # 1 AI OUTSIDE AMBIENT TEMPERATURE 2 AI DROP LEG PRESSURE TRANSDUCER 3 4 5 6 7 8 OUTPUT NO DESCRIPTION POINT NC 1 NC MC1 FAN 2 NC MC2 FAN 3 NC MC3 FAN & SOL SV 3 4 NC MC4 FAN 5 NC MC5 FAN & SOL SV 5 6 NC MC6 FAN 7 8 NO VFD BYPASS Note: Fail safe Switch Positions: NO = OFF / NC = ON *Board addresses may vary at each store. 15
Condenser Operation VFD Normal Operation with VFD Enabled 16
Condenser Operation Bypass Bypass Operation with VFD Disabled 17
Condenser VFD Start up Instructions 18
Condenser VFD Start up Instructions 19
Condenser VFD Start up Instructions B VFD=REV/BYP=OK Switch two wires on top of 2VSC C VFD=OK/BYP=REV Switch two wires on top of 2BPC D VFD=REV/BYP=REV Switch two of the field installed wires on the bottom of 2BPC E VFD=REV/BYP=REV Switch two of the field installed wires on the bottom of the O/L Relay 20