Emerson Control Link Refrigeration System Controller Installation Instructions Manual
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technical bulletin
Control Link RSC Installation Instructions
Overview
The Control Link Refrigeration System Controller (CL-RSC) is an electronic device that can control all functions
of a single-compressor refrigeration system, including refrigeration, defrost, and alarming. Scheduled defrost and
case light control is also possible with the addition of an expansion real-time clock module (P/N 618-2082, available separately).
The CL-RSC reads discharge air and defrost termination temperature from sensors mounted in the case. The CLRSC may control two external relays (compressor plus one configurable relay) directly from its two onboard drycontact relay outputs, or it may use a pluggable expansion output board (P/N 618-1120 for compressor control, or
618-2085 for refrigeration solenoid control) for activating case system components.
NOTE: For information about networking Control Link RSC with E2, refer to Technical Bulletin 026-4602
available on the Internet at http://www.emersonretailsolutions.com/library
Mounting
Main Module / Relay Expansion Board
The Control Link main module and relay expansion boards are designed for mounting on a refrigerated case or in
an enclosure near the case. The output board connects to the main module with a ribbon cable and therefore should
be mounted directly below the main module using the attached stand-off bracket. Figure 1 shows module dimensions, and Figure 2 shows relay expansion board dimensions.
.
Figure 1 - Control Link Module Mounting
Document Part # 026-4600 Rev 3 23-APR-2008 Page 1 of 8
©2007 Emerson Climate Technologies Retail Solutions, Inc. This document may be photocopied for personal use.
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Figure 2 - Expansion Board Mounting
technical bulletin
Control Link RSC Installation Instructions
Main Module and Expansion Board Environment Specs
Operating Temperature: 0 — 60°C (14—140°F)
Operating Humidity: 90% RH non-condensing
Storage Temp: -30—65°C (-22—149°F)
Max Power Consumption: 15W (Control Link w/expansion board)
Remote Display Mounting
The remote display is designed to be mounted on an accessible part of a
refrigerated case or enclosure, no more than 25 feet from the main module. If flush mounting on a flat surface such as the front of a case or
enclosure, punch a 5/8” square hole in the surface to allow the protruding RJ45 jack to recess, and then drill 5/32” holes for the mounting
screws using the remote display itself as a template. Figure 3 shows the
dimensions.
Power down the main module before connecting the remote display. Use CAT5 wiring with RJ45 connectors to connect
the Main Module with the Remote Display. Do not exceed a maximum length of 25 feet.
Figure 3 - Remote Display Mounting
Wiring
Power (Control Link Module without output board, or with
618-2085 output board)
When the Control Link module is used without an output board or with
the 816-2085 output board, connect 120-240 VAC 50-60 Hz line voltage
to the spade lug connectors on the lower right side of the Control Link
module (Figure 4). The expansion board is powered from the CL-RSC
and requires no external power connection.
Power (Control Link Module with 618-1120 output board)
Figure 4 - Control Link Power
When the 618-1120 output board is used with a Control Link module,
connect the L and N spade lug terminals on the module to the L and N spade lug terminals on the output board (Figure 4).
Connect 120-240 VAC 50-60 Hz line voltage to the screw terminals labeled L and N on the output board. Do not connect
any wire to the middle terminal.
Sensors
Case temperature and defrost termination temperature sensors must be wired to the top three-terminal connector on
the left side of the Control Link module. Use only CPC
NTC 10k thermistors. The defrost termination sensor must
be a 10k thermistor, not a temperature switch. Wire as
shown in Figure 5. Mount the case temp sensor in the discharge air stream for the case. Mount the defrost termination sensor near the evaporator coil.
Figure 5 - Sensor Wiring
Inputs for switches to activate setpoint shift and initiate defrost may be wired to Input 3, and also to the Def Term input
(Input #2) if no defrost termination sensor is being used. The functions of these switches are determined by parameters
SI2d and SI3d in Advanced Parameters.
Document Part # 026-4600 Rev 3 23-APR-2008 Page 2 of 8
©2007 Emerson Climate Technologies Retail Solutions, Inc. This document may be photocopied for personal use.
Visit our website at http://www.emersonretailsolutions.com/ for the latest technical documentation and updates.
technical bulletin
Control Link RSC Installation Instructions
CL-RSC Onboard Outputs
If using CL-RSC without an expansion board, wire the outputs to the two-wire terminals
on the right side of the control unit, as shown in Figure 6. Each of these output points are
rated to a maximum of 3A @ 250V. For loads greater than 3A, use the outputs to energize
external relays for compressors, defrost, and case lights.
Expansion Board Wiring
Both types of relay output boards connect to the Control Link main module using an 8-pin
ribbon cable. Plug the cable onto the Expansion Board connector at the bottom of the main
module.
Relay and Pressure Switch Wiring (618-2085 Output
Board)
Defrost, Fans, and Aux Relay (
Using spade lugs, connect the defrost heater(s), case fans, and
auxiliary output (either case lights or an alarm device) to the
three relays on the left side of the relay output board as shown in
Figure 7. Refer to Tabl e 1 for relay ratings.
Figure 6 - CL-RSC Outputs
Compressor Relays
The Control Link uses two relays on the output board to control
the compressor. Line voltage must be connected to the Line 1 and
Line 2 connectors on relays 1 and 2 respectively. The Load 1 and
Load 2 connectors are wired to the compressor. Figure 7 shows
the wiring diagram. Refer to Table 1 for relay ratings.
Relays Output Board 618-2085
Defrost and Aux 10A at 120VAC
Fan 208-230VAC 2 FLA 4 LRA
Compressors 208-230VAC 10FLA 60LRA
115VAC 13FLA 86LRA
Table 1 - Relay Ratings (Output Board 618-2085)
Pressure Switch Wiring
Figure 7 - Expansion Board Output Wiring
If desired, a pressure switch may be used to deactivate the compressor if a high/low suction pressure condition occurs.
Remove the jumper wire and connect this switch to the dual screw-terminal Pressure Switch connector located in the middle of the relay output board. See Figure 7. If not used, these terminals must be jumpered in order for the board to work.
The pressure switch must be N.C. (normally closed) type.
Relay Wiring (618-1120 Output Board)
Use the Form C contactors on the output board points labeled RELAY
3 through RELAY 6 to connect the defrost, auxiliary, fans, and solenoid or contactor. Refer to Figure 8, and refer to Tab le 2 for relay rat-
ings and fail-safe positions.
Figure 8 - Expansion Board Output Wiring
Document Part # 026-4600 Rev 3 23-APR-2008 Page 3 of 8
©2007 Emerson Climate Technologies Retail Solutions, Inc. This document may be photocopied for personal use.
Visit our website at http://www.emersonretailsolutions.com/ for the latest technical documentation and updates.
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