RefPlus Guardian+ User manual

Certified ISO-9001
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SPECIFICATI0NS............................................................................................................................................................................................................................ 2
WIRING DIAGRAMS
POWERED BY EXTERNAL SOURCE (PILOT DUTY)................................................................................................................................................................................ 3
POWERED BY CONDENSING UNIT (LINE DUTY) ................................................................................................................................................................................. 4
ACCESSORIES................................................................................................................................................................................................................................. 5
DIMENSIONS ................................................................................................................................................................................................................................. 6
COIL SENSOR LOCATION ............................................................................................................................................................................................................... 6
NAVIGATION USING THE BASIC DISPLAY..................................................................................................................................................................................... 7
USER INTERFACE/CONTROLLER SETUP........................................................................................................................................................................................ 7
MENUS AND PARAMETERS
BASIC SETPOINTS MENU................................................................................................................................................................................................................. 8
ADVANCED SETPOINTS MENU.......................................................................................................................................................................................................... 8
TYPES OF CONTROL - FIRST TIME SETUP MENU................................................................................................................................................................................. 10
SYSTEM MODES.............................................................................................................................................................................................................................. 10
AUXILIARY INPUT MODES ............................................................................................................................................................................................................... 10
VARIABLES MENU ........................................................................................................................................................................................................................... 10
REFRIGERANTS............................................................................................................................................................................................................................... 10
VALVE TYPES................................................................................................................................................................................................................................... 10
ALARM STATUS MENU ..................................................................................................................................................................................................................... 11
ALPHABETICAL LIST OF ABBREVIATIONS..................................................................................................................................................................................... 11
SMART ACCESS .............................................................................................................................................................................................................................. 14
REPLACEMENT PARTS.................................................................................................................................................................................................................... 14
Table of Contents
Specifications
Controller
Input Voltage: 100 VAC - 240 VAC
Ambient Temp: -40°F to 140°F (-40°C to 60°C)
Operating Temp: -40°F to 140°F (-40°C to 60°C)
Inputs:
(3) temperature sensor
(3) multi-use (temp sensor or digital input)
(1) pressure sensor input
Valve Types: unipolar and bipolar stepper motors (12V)
Relays: 1-20A resistive (defrost)
(2) 10A inductive
Auxiliary Input 1: room temp, coil temp, monitor, 2nd temp setpoint, door
switch, external alarm, system off, defrost interlock, defrost
lockout
Auxiliary Input 2:
Auxiliary Input 3:
Communication: Standard TCP/IP
Pressure Transducer
Pressure Range: 0 to 150 psia
Proof Pressure: 450 psi
Burst Pressure: 1500 psi
Operating Temp: -40°F to 275°F (-40°C to 135°C)
Temperature Sensor
Sensor Specs: -60°F to 150°F (-51°C to 65°C) moisture resistant package

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Wiring Diagram - Powered by External Source (Pilot Duty)
COM
NCNO
O-10V
DEFROST DELAY
COM
NC
NO
BLUE
ORANGE
YELLOW
RED
BLACK
TEMP6
AUX3
TEMP5
AUX2
TEMP4
AUX1
TEMP3
TCOIL
TEMP2
TAIR
TEMP1
TSUC
RED
BLACK
GREEN
PSI
A
B
SHIELD
RS 485
SS
AS
TS
TS
L1
L2/N
+
-
PT
LSV
RSV / KE2 EEV /
SPORLAN
BLUE
ORANGE
YELLOW
RED
BLACK
BLACK
WHITE
RED
GREEN
EMPTY
M2
M3
M4
L2
L1
USE COPPER CONDUCTOR ONLY
L1 L2
M1
3
HS
H3
DH
N
240/1/60
TS
4
M
LEGEND
- - - - : BY OTHER
o
: TERMINAL BLOCK
AS : AIR SENSOR
DH : DEFROST HEATER
EXV : ELECTRONIC EXPANSION VALVE
HS : HEATER SAFETY
LS : LIQUID LINE SOLENOID VALVE
M# : FAN MOTOR INTERN. PROT.
PT : PRESSURE TRANSDUCER
SS : SUCTION SENSOR
TS : TEMPERATURE SENSOR

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Wiring Diagram - Powered by Condensing Unit (Line Duty)
#
USE COPPER SUPPLY WIRES
LEGEND
COM
NCNO
O-10V
DEFROST DELAY
COM
NC
NO
BLUE
ORANGE
YELLOW
RED
BLACK
TEMP6
AUX3
TEMP5
AUX2
TEMP4
AUX1
TEMP3
TCOIL
TEMP2
TAIR
TEMP1
TSUC
RED
BLACK
GREEN
PSI
A
B
SHIELD
RS 485
SS
AS
TS
TS
L1
L2/N
+
-
PT
1F
PDS
LSV
#
#
#
#
#
#
C
#
#T #
#3
HS
#
USE COPPER CONDUCTORS ONLY
DH
M1
T1 T2 T3
M2
: TERMINAL BLOCK
M# : FAN MOTOR INTERNALLY PROTECTED
#R: RELAY
- - - - : BY OTHERS
LSV : LIQUID SOLENOID VALVE
EXV : ELECTRONIC EXPANSION VALVE
HS : HEATER SAFETY
AS : AIR SENSOR
DH : DEFROST HEATER
TS : TEMPERATURE SENSOR
SS : SUCTION SENSOR
PT : PRESSURE TRANSDUCER
TO CONDENSING UNIT
H1 H2 H3
RSV / KE2
EEV /
SPORLAN
BLUE
ORANGE
YELLOW
RED
BLACK
BLACK
WHITE
RED
GREEN
EMPTY

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Remote Displays
Part # Description
21232 Basic (Remote) Display w/ 15 ft. cable
21324 Snap track - 12” (305 mm)
21320 Combo Display (no accessories included)
21786 Combo Display - 25 ft. Cable (762 cm)
21320 Combo Display - Junction Box
21781 9V Rechargeable Battery for Combo Display
Accessories
Temperature Sensors
Part # Description Lead Length
21151 Temperature Sensor Pack - 3-colors 15 ft. (457 cm)
21066 Temperature Sensor Pack - 3-colors 40 ft. (1219 cm)
20199 Temperature Sensor Pack - Black 10 ft. (305 cm)
20200 Temperature Sensor Pack - Black 40 ft. (1219 cm)
21795 Temperature Sensor Pack - Yellow 10 ft. (305 cm)
21793 Temperature Sensor Pack - Green 10 ft. (305 cm)
21794 Temperature Sensor Pack - Blue 10 ft. (305 cm)
Pressure Transducer
Part # Description Lead Length
20201 Pressure Transducer – 0 to 150 psia 10 ft. (305 cm)
20204 Pressure Transducer - 0 to 150 psia 40 ft. (1219 cm)
RSV - Refrigeration Stepper Valves
Valve Body Part # Connections - Inches ODF
Inlet x Outlet Lead Length
RSV-100 21667 3/8 x 1/2 5 ft. (152 cm)
RSV-100 21665 3/8 x 1/2 10 ft. (305 cm)
RSV-100 21666 3/8 x 1/2 40 ft. (1219 cm)
RSV-130 21169 3/8 x 1/2 5 ft. (152 cm)
RSV-130 21161 3/8 x 1/2 10 ft. (305 cm)
RSV-130 21162 3/8 x 1/2 40 ft. (1219 cm)
RSV-220 21170 3/8 x 1/2 5 ft. (152 cm)
RSV-220 21163 3/8 x 1/2 10 ft. (305 cm)
RSV-220 21164 3/8 x 1/2 40 ft. (1219 cm)
RSV-320 21171 3/8 x 1/2 5 ft. (152 cm)
RSV-320 21165 3/8 x 1/2 10 ft. (305 cm)
RSV-320 21166 3/8 x 1/2 40 ft. (1219 cm)
RSV-320 21672 1/2 x 1/2 5 ft. (152 cm)
RSV-320 21167 1/2 x 1/2 10 ft. (305 cm)
RSV-320 21168 1/2 x 1/2 40 ft. (1219 cm)
RSV-400 21529 5/8 x 7/8 15 ft. (457 cm)
RSV-400 21530 5/8 x 7/8 40 ft. (1219 cm)
RSV-550 21594 5/8 x 7/8 15 ft. (457 cm)
RSV-550 21595 5/8 x 7/8 40 ft. (1219 cm)
RSV-650 21779 5/8 x 7/8 15 ft. (457 cm)
RSV-650 21778 5/8 x 7/8 40 ft. (1219 cm)
RSV-C10 Stator 21149 For RSV-100 to 320 10 ft. (305 cm)
RSV-C40 Stator 21150 For RSV-100 to 320 40 ft. (1219 cm)
RSV-LC15 Stator 21525 For RSV-400 to 650 15 ft. (457 cm)
RSV-LC40 Stator 21526 For RSV-400 to 650 40 ft. (1219 cm)

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Dimensions
Steps to Ensure Proper Coil Sensor Location
Remote (Basic) Display
IMPORTANT
Installing the Sensor - The most active portion of the sensor is the rst 1/2” of the
probe.
The inset photo in Figure 2 shows that the sensor is positioned so that
it is touching two circuit tubes. When inserting the sensor into the coil,
the tip should touch one of the circuit tubes, and the probe should be in-
serted into the ns approximately 1/16” deeper than the stainless shield-
ing. Pinch the ns gently together, securing the sensor in place. This
provides thermal ballast to ensure a complete defrost.
NOTE: The sensor should not be located adjacent to the electric heating
elements. It should be about half the distance between the heaters if possible.
Alternate Method - As the defrost termination sensor, it is important to ensure the
sensor does not terminate defrost before all frost is removed from the coil. In some
installations, inserting the sensor into the coil may position it too close to the de-
frost heat source. An alternate method of positioning, Figure 3a, places the sensor
vertically between the coil ns. Figure 3b shows the coil sensor properly secured.
NOTE: On a small fraction of installations the sensor placement may require
adjusting. This is typically caused by product loading, door openings, air
ow, etc. The sensor(s) should be placed where the frost disappears last on
the coil.
Extending sensor wires
After the sensors are mounted, they are routed back to the controller. If the wires must
be extended,use 18 gauge twisted shielded pair. Maximum, combined length, for
extension: 100 ft. Contact RefPlus Therm if planning to extend sensor wires beyond
100 ft.
If additional resistance affects the temperature or pressure reading of the con-
troller, the temperature and pressure may be “offset” to read correctly. Use the
OFFSET* function, in the SETPOINTS menu.
When running the sensor wires to the controller avoid introducing electrical noise.
Electrical noise can occur when sensor wires are located near high voltage lines.
Underwriter’s Laboratories denes high voltage as above 30V. The higher the
voltage, the more likely electrical noise will occur.
If crossing a high voltage line is necessary, run sensor wiring at right angles to
prevent noise.
* Not available on Basic (Remote) Display.

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Navigation Using the Basic (Remote) Display
Basic (Remote) Display User Interface
Most Guardian+ controllers ship with the Basic Display. The display
allows service technicians to change the major setpoints. Setpoints
can also be accessed using the Guardian+ Combo Display or the
controller’s web pages.
Controller Setup
Upon initially applying power to the controller, the controller
will initialize, then automatically enter Introduction Mode. The
Introduction Mode consists of four Types of Control options:
Ed - Electric Defrost with Mechanical TEV
EdE - Electric Defrost with Electric Expansion Valve
Ad - Air Defrost with Mechanical TEV
AdE - Air Defrost with Electric Expansion Valve
Step 1 - Using the and arrows, moves the user through the
available Types of Control options. Once the preferred option is
displayed press and hold the ENTER button for 3 seconds.
Note: For mechanical valve control, Ed and Ad options, con-
tinue to Step 4. For Ede and AdE control options continue to
Steps 2, 3, &4.
Step 2 - Next, the controller prompts for the Expansion Valve
Type, and displays rS (RSV). If this is the correct selection, press
and hold the ENTER button for 3 seconds.
If not, use the or arrow to move to the correct valve.
With correct electric valve displayed, press and hold ENTER for
three seconds.
Note: Custom valve setup is not available from the Basic
Display.
Step 3 - The controller now prompts for Refrigerant Type and
displays 404 (R-404a) as the default. Change this value by press-
ing the or arrow. Once you have the correct value, press and
hold ENTER for three seconds.
Step 4 - The fourth prompt is whether SMART ACCESS is EN-
ABLED or DISABLED. SMART ACCESS allows you to easily view
your controller online. Make your selection by using the or
arrow, and then press and hold ENTER for three seconds. THESE
ARE THE ONLY SETPOINTS REQUIRED TO BEGIN CONTROL-
LING THE SYSTEM.
Additional Setpoints
For the majority of users, the Basic Display will provide the neces-
sary parameters to setup the controller.
From the default display, pressing the and arrows will cycle
through the Variables menu. The ENTER button will toggle be-
tween the variable name and value.
Changing Setpoints
Pressing and holding the ENTER button will enter the Basic Set-
points menu. Press ENTER button to toggle between set point and
value.
Pressing and holding the BACK button will enter the Advanced
Setpoints menu. Press ENTER button to toggle between setpoint
and value.
When the parameter value is displayed it may be changed by using
and arrows, and ENTER buttons. The and arrows will
increase or decrease numerical values, and will scroll through the
available options, on the non-numerical setpoints.
Press and hold the ENTER button for 3 seconds to save the dis-
played value.
To abort changes, press BACK to return to the parameter abbrevi-
ation.
Manual Valve Control
Press and hold the BACK button & arrow to put the EEV in
Manual Control mode. and arrows will control the valve open-
ing. ENTER will advance to the next digit, and BACK will exit this
mode.
Manual Defrost
Press and hold
ENTER
and to put the controller into Defrost (next
mode).
Diagnostics Mode
The Guardian+ has been programmed with a diagnostics mode.
When activated, the controller energizes each relay for 60 seconds.
When the compressor relay is on the EEV will regulate to the
Superheat setpoint.
Display Firmware
Pressing and holding all 4 buttons ( BACK and ENTER ) will
show the display’s rmware revision (dir – Display Revision)
Display Options
Simultaneously pressing and holding the and arrows will show
the address of the display (reserved for future versions).
Web Login
The User Name and Password are required when accessing the
controller using the web page.
The defaults are: User Name: ke2admin Password: ke2admin
IMPORTANT: For security purposes, the User Name and Pass-
word should be changed from the default.

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Menus & Parameters

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Menus & Parameters

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Menus & Parameters

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Menus & Parameters

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Menus & Parameters

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Menus & Parameters

Introduction to Smart Access
Smart Access provides quick and easy, real time access to your
refrigeration systems, 24/7
Now it’s easier than ever to monitor and adjust your Guardian+
remotely. While the Guardian+’s free connectivity is still available,
some customers prefer the simplicity and convenience of Smart
Access to enjoy the benets of the controller’s communication cap-
ability.
All the Guardian+ needs is a physical connection to the network
router with a cat 5 cable. Once enabled, Smart Access quickly con-
nects to your personal web portal, hosted by KE2 Therm, and pro-
vides a “customized” dashboard of all the controllers you setup with
Smart Access, akk for a nominal monthly fee. No port forwarding.
No VPN.
Smart Access - Online Access In 3 Easy Steps
Preliminary
Connect the Guardian+ to the customer’s network.
Step 1 Enable Smart Access in the Set points
menu
After the initial Introduction Mode setup, press and
hold the ENTER button.
Press the arrow two times to view SA
(abbreviation for Smart Access). Press ENTER ,
then use the arrow to change diS (disabled) to
EnA (enabled)
Press and hold the ENTER button for 3 seconds to
save the change.
Step 2Go to smartaccess.ke2therm.net
Using your PC, tablet or smartphone, enter
http://smartaccess.ke2therm.net in the web
browser’s address bar.
Step 3 Enter default information and click Log In button
Site: installer
Password: controller’s Mac Address (from sticker on
back of controller).
IOM-GUARDIAN-En-04/20-R2
RefPlus Inc. reserves the right to make any changes in the design or
specicaons of any product at any me without noce.
© Copyright 2020 by RefPlus Inc.
USA & CANADA 1-888-816-2665 / refplus.com
2777 Grande-Allée,Saint-Hubert, Québec,Canada,J4T 2R4 T 450 641-2665 F 450 641-4554
ISO-9001
Replacement Parts
Please refer to the Replacement Parts Catalogue available online at www.refplus.com
(https://refplus.com/en/parts-services/)