HTPG HT-EN-IOM-0623 EcoNet Enabled Unit Coolers Instruction Manual
- June 13, 2024
- HTPG
Table of Contents
HT-EN-IOM-0623 EcoNet Enabled Unit Coolers
Product Information
Publication No. | HT-EN-IOM-0623 |
---|---|
Product | Unit Coolers |
Manual Title | Installation and Operations Manual |
Product Usage Instructions
-
EcoNet Enabled Unit Coolers ship with the EcoNet controller
installed and all sensors and relays wired. Prior to installation,
you must verify that all sensors, defrost heaters, and wire
harnesses are securely connected to the controller board and
terminal board. -
Verify correct voltage from the main power supply to the
evaporator unit. Set the Voltage Selector Switch on the controller
board to the correct voltage setting (115V/230V) before powering up
the unit. -
Connect main power to the evaporator unit at the L1/L2 and GND
terminals on the terminal board as shown in the wiring
diagram. -
During system installation:
-
For refrigerant line brazing, cover EXV with a wet rag to
protect it from excess heat from the torch. Remove the Suction Temp
Sensor from the suction line before brazing, and reinstall it at
the 10 or 2 o’clock position after brazing is completed. Secure the
Suction Temp Sensor with nylon tie straps and insulate the suction
line. -
Refer to the factory label at the evaporator unit for correct
voltage and amp draw requirements to verify circuit breaker size
where the unit will be connected to. -
If a defrost timer is installed on the condensing unit, make
sure it is disconnected/disabled. All defrost functions are
performed by the controller board. Refer to the factory label at
the condensing unit for correct voltage and amp draw
requirements. -
For purging lines (pulling vacuum), there are two options:
-
To purge lines on a system with EXV closed, make sure that the
controller is off and pull a vacuum from both suction and discharge
ports at the condensing unit. -
Alternatively, to purge lines on a system with EXV open, power
up the controller and wait a couple of minutes for the controller
to command the valve to open. Leave the controller powered on while
system evacuation is being done.
-
Publication No. HT-EN-IOM-0623
Unit Coolers
Installation and Operations Manual
Table of Contents
Introduction and Board Layout ………………………………………………………………2 Safety Considerations
…………………………………………………………………………………………….3 System Installation
…………………………………………………………………………………………..3-4 Start-Up/ Commissioning
………………………………………………………………………………………..5 Operational Overview
………………………………………………………………………………………10 Diagnostics
…………………………………………………………………………………………………………..11 Group Operation
…………………………………………………………………………………………..12-13 Door Switch
…………………………………………………………………………………………………….13-14 Compressor Control (Package
Refrigeration Units)1 ………………………………..15-16 Defrost Heater Pump Down Delay
………………………………………………………..16-17 Operational Limits
………………………………………………………………………………………………17 Replacement Parts and Part Numbers
………………………………………………………….17 Typical Wiring for Multiple Controllers
……………………………………………………27-29 Addendum
…………………………………………………………………………………………………….30-32 EcoNet Command Center
Safety Considerations ……………………………………………………………………………………..17 Installation and
Mounting Instructions ………………………………………………………17 Wiring
Considerations…………………………………………………………………………………….18 User Guide
………………………………………………………………………………………………..19-22 Maintenance
………………………………………………………………………………………………….22 Installer Settings
…………………………………………………………………………………….24-27
2
EcoNet® Enabled Unit Coolers
Introduction
EcoNet® Enabled Unit Coolers are intelligent, electronically operated
evaporators for walk-in coolers and freezers designed for easier installation
and energy savings. Developed in conjunction with Rheem Manufacturing, it
builds on the success, reliability and efficiency of the EcoNet technology and
brings it to commercial refrigeration.
EcoNet Enabled Unit Coolers save energy in refrigeration systems through
precise superheat and space temperature control, fan cycling, and controlling
how often the system goes into defrost based on compressor runtime. It
eliminates unnecessary defrosts, maximizes energy efficiency with less
compressor runtime, reduces liability by eliminating icing issues, reduces fan
speed to 50% during off cycle to save energy, and reduces temperature
fluctuations by regulating defrosts for improved product quality. EcoNet
Enabled Unit Coolers can be configured to work on a single or dual evaporator
coil, and can be used with a condensing unit in single and multiple evaporator
installations as a group.
Drain Sensor Input (Optional)
EcoNet Board
Space Temperature Sensor
Auxiliary Sensor Input
EcoNet Connection Terminals
Digital Input Terminals
Wire Harness Connector Terminal · Suction Pressure Transducer · Suction
Temperature Sensor · Evap. Temperature Sensor 1 · Evap. Temperature Sensor 2
(not used on Next-Gen AllTemp Low Profile models) · EXV Connector
Controller Display and Navigation Buttons
PWM Fan Output Terminal
Auxiliary Relay Outputs
Defrost Relay Outputs
Figure 1
Voltage Selector Switch Main Power Terminal
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Installation and Operations Manual
· Before service, power to the unit should be disconnected per proper lockout
procedures.
· After power is disconnected wait 10 minutes before touching the board for
power stored to fully discharge.
· The control board has no user serviceable parts, do not try to repair.
· Do not wire the control board while powered.
· If the board becomes corroded replace immediately.
· Cleaning of the control board is not recommended.
10.500″
System Installation
Evaporator
1. EcoNet Enabled Unit Coolers ship with the EcoNet controller installed and
all sensors and relays wired. Prior to installation, you must verify that all
sensors, defrost heaters and wire harnesses are securely connected to the
controller board and terminal board.
2. Verify correct voltage from main power supply to evaporator unit. Set the
Voltage Selector Switch (Figure 2) on the controller board to the correct
voltage setting (115V/230V) before powering up the unit.
4.625″ Figure 2
Safety Considerations
Failure to read and follow all instructions carefully before installing or
operating this control and system could cause personal injury and/or property
damage.
NOTE: All wiring must comply with national, local, and state codes.
WARNING: Disconnect power to the outdoor and indoor units before beginning
installation.
· Only a trained service professional/contractor should use or interact with
the control board.
· Never touch the control board surface directly to avoid static shock damage
or exposure to high voltages.
Voltage Selector Switch
Main Power Terminal
Figure 3
CAUTION: Having the Voltage Selector Switch set to incorrect voltage can damage the controller board when power is connected to it.
3. Connect main power to the evaporator unit at the L1/L2 and GND terminals on the terminal board as shown in the wiring diagram (Figures 2, 3, 4).
Figure 4
4
EcoNet® Enabled Unit Coolers
Main Power L1/L2 Terminals GND Terminal
During System Installation
1. Refrigerant Line Brazing
a. Cover EXV with wet rag to protect from excess heat from torch.
b. Suction Temp Sensor (Figure 7) must be removed from the suction line prior
to brazing. The sensor must be reinstalled on the suction line (10 or 2
o’clock position) after brazing is completed and the tubing has been allowed
to cool down. Use nylon tie straps to secure the Suction Temp thermistor as
shown in Figure 7. After suction temp sensor is installed, suction line should
be insulated and the sensor should be covered with the insulation.
MOUNT WITH NYLON TIE STRAPS
Figure 5 4. Prior to installation, please refer to factory label at
evaporator unit for correct voltage and amp draw requirements to verify
circuit breaker size where unit will be connected to.
Condensing Unit
1. If a defrost timer is installed on the condensing unit, make sure it is
disconnected/disabled (all switches on time clock should be in the OFF
position) (Figure 6). All defrost functions are performed by the controller
board.
2. Please refer to factory label at condensing unit for correct voltage and
amp draw requirements.
Figure 6
Figure 7
2. Purging Lines (pulling vacuum), two options:
a. To purge lines on system with EXV closed, make sure that controller is off,
and pull vacuum from both suction and discharge ports at the condensing unit.
b. OR, to purge lines on system with EXV open, power up the controller and
wait a couple of minutes for the controller to command the valve to open.
Leave controller powered on while system evacuation is being done.
3. While charging the system with refrigerant, ensure that the EXV is open by
powering up the controller and waiting a couple of minutes for the controller
to command the EXV to open. With the controller powered on while the system is
being charged, make sure to monitor the suction pressure, suction temperature,
and superheat via the controller display and also via installer’s gauges.
Please refer to Display Status under the Startup/Commissioning section to show
on the controller display the current suction temperature, suction pressure,
EXV position and calculated superheat.
NOTES:
· If there is a power loss at any time during normal system operation, the
controller will close the EXV, forcing a pumpdown.
· When starting up the system for the first time, the controller will turn the
fans on when the Evap Temp gets below a preset temperature.
· EcoNet EXV’s have a flow direction arrow, but are bi-directional
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Installation and Operations Manual
4. Power Supply
a. Freezers require 230V for electric heaters; coolers can run on 115V or
230V. Please refer to factory label on evaporator unit for amp draw and
voltage requirements for proper circuit sizing at the facility prior to
installation.
NOTE: EcoNet evaporators should be powered by an independent circuit; they
should not be powered from the condensing unit.
b. Set the Voltage Selector Switch on the controller board to the correct
voltage setting (115V/230V) before connecting power to the controller.
CAUTION: Having the voltage selector switch set to incorrect voltage can
damage the controller board when power is connected to it.
c. Connect main power to L1 and L2 on evaporator terminal board. Connect
ground wire to GND on terminal board.
d. Refer to unit wiring diagram attached to cover panel.
e. If there is a power loss at any time during normal system operation, the
controller will close the EXV, forcing a pumpdown. When power is restored, the
controller will resume refrigeration operation.
f. To force the EXV closed while leaving the controller powered on, at the
display go to SettingsSystem EnabledNo. This disables the system (fans off,
EXV closed). To re-enable the system, go to the same display screen and set
System EnabledYes. Please refer to the Setting Navigation Overview on page 6.
Start-Up/Commissioning
1. Local Display (Figure 8)
a. Use the UP/DOWN/SEL/BACK buttons to navigate through the display.
b. To change a parameter, navigate to it using the UP/DOWN buttons, press SEL
until the value is flashing intermittently, use the UP/DOWN buttons to cycle
through the selection, then press SEL again to confirm the selection.
Controller Display
2. Navigation Overview a. Space Temp
SPACE TEMP Press “SEL”
SETTINGS
XX.XX °F
Press “BACK”
STATUS
SERVICE
b. Settings Overview – see page 6 c. Status Overview – see page 7 d. Service
Press “SEL”
SERVICE
Current Alarms
Press “BACK”
Alarm History
Defrost Control Start/Stop/Off
Software Version HT-PG01-00-01-00
UP/DOWN Navigation Buttons
Figure 8
SEL/BACK Navigation Buttons
6
EcoNet® Enabled Unit Coolers
b. Settings Overview
SETTINGS Press “SEL” Press “BACK”
Set Point XX.XX °F
System Enabled Yes/No
Equipment
Press “SEL” Press “BACK”
Time and Date
Press “SEL”
Press “BACK”
Year 20XX
Month of Year Jan-Dec
Day of Month XX
Hour of Day XX
Minute of Hour XX
Group-Member Cfg. No/Gx-L
Network Instance 1-32
Cooler/Freezer Freezer
Refrigerant R448A
Evap Coil Type Single/Dual
Drain Sensor ? Yes/No
Aux Sensor ? Yes/No
EXV Stepper Type 2500/480 steps
EXV SH Set Point 6.5 F
SetPoint Control 2.0 F
Defrost Type Time
Def. Max Run Time 60 MIN
Def.Cmp.Run Time 360 MIN
Def.Adpt.Run Time 720 MIN
Def. Term. Temp 55 °F
Def. Pulse Overr. Yes/No
Cmp. Min Run Time 5 MIN
Cmp. Max Run Time 120 MIN
Door Sw.Config. Off
Door Sw.Time 0 sec
Def.Pmp.Dn.Delay none
Aux Relay Config Comp-Fan Control
Cut-Out Setpoint 0 PSIG
Cut-In Offset 20 PSIG
c. Status Overview
STATUS
Press “SEL”
Press “BACK”
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Installation and Operations Manual
Sensors
Inputs Outputs
EXV Defrost
Press “SEL”
Press “SEL” Press “SEL” Press “SEL” Press “SEL”
Press “BACK”
Press “BACK” Press “BACK” Press “BACK” Press “BACK”
Space Temp XX.XX °F
Evap Temp XX.XX °F
Evap Temp 2 XX.XX °F
Suction Temp XX.XX °F
Sat. Suction Temp XX.XX °F
Suction Pressure XX.X PSIG
Drain Temp XX.XX °F
Auxiliary Temp XX.XX °F
Digital #1 Input On/Off
Digital #2 Input On/Off
Digital #3 Input On/Off
Defrost #1 Relay On/Off
Defrost #2 Relay On/Off
Aux #1 Relay On/Off
Aux #2 Relay On/Off
EXV Current Pos. 50.00%
Superheat X.X F
Superheat Setpt. 6.5 F
Last Defr. Time 25.0 MIN
Nxt.Def.Cmp.Time 360.0 MIN
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EcoNet® Enabled Unit Coolers
3. Parameters List
Parameter
Range
Default
System Enable
Setpoint
Group Member Cfg Network Instance Cooler/Freezer
Refrigerant
Evap Coil Type* Drain Sensor? Aux Sensor? EXV Stepper Type EXV SH Setpoint
Setpoint Control Defrost Type4
Yes or No 25°F to 60°F (Cooler); -40°F to 35°F (Freezer)
(See group member list)
1 to 32 Cooler or Freezer (See supported refrigerants list)
Single or Dual Yes or No Yes or No
2500 or 480 steps
4.0dF to 20.0dF 0.5dF to 20.0dF Timed/Adaptive
Yes -10°F
No 1 Freezer R448A Single No No 2500 steps (Sporlan) 6.5dF 2.0dF Timed
Def. Max Run Time 10 to 60 minutes
60 minutes
Def. Cmp. Run Time Def. Adpt. Run Time4
Def. Term. Temp1
Def. Pulse Overr.1 Cmp. Min. Run Time3 Cmp. Max. Run Time Door Sw. Config.2
Door Sw.Time2
0 to 900 minutes
360 to 900 minutes
35 °F to 65 °F Yes or No
3 min/4 min/5 min
0 to 480 minutes Off – NO – NC
0 sec/30 sec/1 min/2 min/3 min/4 min/5 min
360 minutes
720 minutes 55 °F (Freezer); 40 °F
(Cooler) Yes
5 minutes
120 minutes Off 0 sec
Def. Pmp. Dn. Delay2
none/1 min/2 min/3 none (Fan Control); 1 min
min/4 min/5 min
(Comp-Fan Control)
Aux Relay Config. 5
Comp-Fan Control; Fan Control
Cut Out Setpoint 5 -2 PSIG to 60 PSIG
Comp-Fan Control
0 PSIG (Freezer); 20 PSIG (Cooler)
Cut-In Offset 5
10 PSIG to 50 PSIG
20 PSIG
- NOTE: Parameters will be pre-selected on factory-installed EcoNet Enabled
Unit Cooler boards to match equipment. Air defrost units will ship from factory preset to “Cooler” and “35OF”. Electric defrost units will ship from factory preset to “Freezer” and “-10OF”. Center Mount evaporators will ship with Evap Coil Type set to “Dual” and Def. Pulse Overr. set to “Yes.” Replacement EcoNet Enabled Unit Cooler boards will ship with the default parameters of “Freezer” and “-10OF”. A trained service professional/contractor may adjust the preset depending on the
equipment the board is being replaced in.
4. Parameter Definitions
a. System Enable: Set to YES to enable controller cooling operation. Set to NO
to force system pump down; controller will close the EEV and turn the fans
off. Allows for system pump down while controller is still powered on. NOTE:
There is no time limit on this setting; make sure
System Enable is set back to YES to allow controller to resume cooling
operation.
b. Setpoint: This is the room setpoint for the walk-in box. If the controller
is configured as a “Cooler”, the available room setpoint range is 25°F to
60°F; if the controller is configured as a “Freezer”, the available room
setpoint range is -40°F to 35°F (See “d” Cooler/ Freezer parameter).
c. Group Member Cfg.: This is to address the controller as part of a group if
multiple evaporators will be wired together to cool the same space (See Group
Operation, Command Center sections).
d. Network Instance: This is to address the controller to work as a standalone
unit, but wired to other evaporators on the same communication bus with a
Command Center Display (See Command Center section).
e. Cooler/Freezer: Set the controller for the type of operation it will be
used in. If set as “Freezer”, the controller will use the defrost relays to
activate the electric heaters in the evaporator, and allow a drain time at the
end of the defrost cycle. If set as “Cooler”, the unit will operate as air
defrost (off-cycle).
f. Refrigerant: Set the refrigerant that will be used in the system from among
the list of supported refrigerants.
Supported Refrigerants
R448A (Default) R407A R407C R449A R404A R507A R513A R450A R454C4 R455A4
g. Evap Coil Type: Set for the type of evaporator being used. “Single” applies
to Low Profile evaporators. “Dual” applies to dual coil designs such as Center
Mount evaporators, where Evap Temp 2 sensor is used.
h. Drain Sensor?: Set to configure if drain temp sensor is installed.
i. Aux Sensor?: Not used.
j. EXV Stepper Type: Set to configure EXV type; 2500 steps or 480 steps. This
should come preset from the factory and should not be changed.
1 Feature available with controller software version HT-PG01-00-01-13 or
newer.
2 Feature available with controller software version HT-PG01-00-01-18 or
newer.
3 Feature available with controller software version HT-PG01-00-01-21 or
newer.
4 Feature available with controller software version HT-PG01-00-01-22 or
newer.
5 Feature available with controller software version HT-PG01-00-01-23 or
newer.
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Installation and Operations Manual
4. Parameter Definitions continued
k. EXV SH Setpoint: Set to configure desired superheat setpoint.
l. Setpoint Control: Set to configure desired hysteresis range for space
temperature control. When the system is in Refrigeration mode, if the Space
Temp Setpoint is -10°F with a default Setpoint control differential of 2.0 dF,
the unit will continue to cool the space until the Space Temp. is just under
-10°F. At this point, the system will pump down and run the fans at half
speed. When the Space Temp rises to around -8°F, Refrigeration mode will start
back up: EXV will open and the fans will run at full speed until Setpoint is
reached again or the unit goes into defrost.
m. Def. Max Run Time: Set to configure the maximum allowed defrost time.
n. Defrost Type4: Select desired defrost algorithm: Timed or Adaptive. Note:
this only applies if controller is set to Freezer. If controller is set to
Cooler, Timed defrost will always remain as the functional setting. See
Defrost Mode section on page 10 for more information.
o. Def. Cmp. Run Time: Set to configure the allowed compressor runtime before
the unit goes into defrost when controller is set to Timed defrost. See
Defrost Mode section on page 10 for more information.
p. Def. Adpt. Run Time4: Set to configure allowed compressor runtime before
unit goes into defrost when controller is set to Adaptive defrost. See Defrost
Mode section on page 10 for more information.
q. Def. Term. Temp1: Sets the Defrost Termination Temperature; the temperature
that the Evaporator has to reach in order to terminate the defrost cycle.
NOTE: If the Cooler/Freezer parameter is manually adjusted, the Defrost
Termination Temp setting will revert back to default (55 °F for Freezer, 40 °F
for Cooler); if a value other than default is desired, make sure that Cooler/
Freezer is set prior to adjusting the Defrost Termination Temperature.
r. Def. Pulse Overr1: Allows the user to override the pulsing function of
Defrost Relay 1 (Top Heater on a Low Profile Evaporator). If the override of
the Defrost Relay 1 pulsing is not desired, set to “No” (Relay 1 will pulse).
If overriding the pulsing is desired, set to “Yes”; the Defrost Relay 1 will
remain energized for the duration of the defrost cycle (Relay 1 will NOT
pulse). NOTE: Def. Pulse Overr. must be set to “Yes” on Center Mount, dual
coil evaporators for proper defrost performance.
s. Cmp. Min Run Time3: Adjust the minimum compressor run time for each cooling
cycle. When refrigeration mode starts (EXV opens), the system will run for the
minimum time that has been set. After this minimum time has elapsed,
controller will pump down the system if Setpoint has been satisfied. Default
setting is 5 minutes; can be adjusted to 3 minutes or 4 minutes. In a Group
operation, only the Leader needs this setting adjusted; the Followers will
start their refrigeration mode and pump down when commanded by the Leader.
t. Cmp. Max Run Time: Set to configure the allowed
compressor runtime until Space Temperature Alarm is generated. If unit is
actively cooling the space continuously for longer than this time period, an
alarm will be generated to indicate that box has not achieved Setpoint. u.
Door Sw. Config.2: Configure Door Switch function as Normally Open (N.O.) or
Normally Closed (N.C.) to enable Digital Input #1 to be used as contact for a
door switch. Default setting is Off. Please refer to Door Switch section on
page 13 for more information. v. Door Sw. Time2: When Door Switch is
configured, use this parameter to set desired delay to pump down the system
when the door switch input (Digital Input #1) becomes inactive. Default is 0
seconds; can be configured to 30 seconds, 1 minute, 2 minutes, 3 minutes, 4
minutes or 5 minutes. NOTE: If Door Sw. Config. is set to Off, this parameter
will not affect equipment operation. Please refer to Door Switch section on
page 13 for more information. w. Def. Pmp. Dn. Delay2: Set desired delay for
pump down before electric heaters become active at the start of a defrost
cycle. Default is None; can be set to 1 minute, 2 minutes, 3 minutes, 4
minutes or 5 minutes. NOTE: This parameter only affects units that are set to
Freezer. See Defrost Heater Pump Down Delay section on pages 15 -16 for more
information.
x. Aux Relay Config.
i. Comp-Fan Control: Controller will use Auxiliary Relay 1 for Evaporator Fan
ON/OFF control, and Aux Relay 2 for Compressor ON/OFF control based on Suction
Pressure transducer reading. NOTE: This setting only applies to Packaged
Refrigeration Units. Packaged Refrigeration Units MUST be set to Comp-Fan
Control or damage to equipment will result!!!
ii. Fan Control: Controller will use Auxiliary Relays 1 and 2 for Evaporator
Fan ON/OFF control and speed control. This setting is applicable for all other
evaporator unit models. Not applicable for Packaged Refrigeration Units!!!
y. Cut-Out Setpoint: Pressure setpoint at which the compressor will turn off
when Aux Relay Config. Is set to Comp-Fan Control.
z. Cut-In Offset: Pressure differential for compressor to turn on when Aux
Relay Config. is set to Comp-Fan Control
1 Feature available with controller software version HT-PG01-00-01-13 or
newer.
2 Feature available with controller software version HT-PG01-00-01-18 or
newer.
3 Feature available with controller software version HT-PG01-00-01-21 or
newer.
4 Feature available with controller software version HT-PG01-00-01-22 or
newer.
5 Feature available with controller software version HT-PG01-00-01-23 or
newer.
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EcoNet® Enabled Unit Coolers
5. Display Status
a. Sensors
- Space Temp 2) Evap Temp 3) Evap Temp 2 (not applicable on Low Profile
evaporators) 4) Suction Temp 5) Saturated Suction Temp (conversion based on
refrigerant selection) 6) Suction Pressure Gauge 7) Drain Temp (optional; requires sensor installed and
configured) 8) Aux Temp (not used) b. Inputs 1) Digital Inputs 1, 2 and 3 c. Outputs 1) Defrost Relay 1 and 2 2) Aux Relay 1 and 2 d. EXV 1) EXV current position 2) Calculated superheat 3) Current superheat Setpoint
6. Defrost
a. Last defrost elapsed time b. Remaining runtime until next defrost
7. Service
a. Current Alarms 1) Use the UP/DOWN buttons on the display to cycle through the currently active alarms
b. Alarm History 1) Use the UP/DOWN buttons on the display to cycle through the alarm history list.
NOTE: In order for the Alarm History time stamp to be accurate, the Time and Date must be configured on the controller (See Settings Overview, page 6, under the Start-Up/Commissioning section). c. Defrost Control - Use the UP/DOWN and SEL buttons to manually start/stop defrost cycle
d. Software version (displays current software version)
Operational Overview
Refrigeration Mode
When powered up, the controller will go through an initial startup procedure driving the EXV closed to ensure the valve is properly seated. If the space temperature is higher than the Space Temp Setpoint, the controller will attempt to cool the space: After a couple of minutes the EXV will start opening and the controller will keep actively metering the valve to achieve its superheat Setpoint. The fans will start after a delay to ensure that the evaporator coil is cold enough.
During normal refrigeration mode, the fans will run at full speed, and the EXV
will continuously modulate to maintain superheat. In order to prevent
compressor short cycling, the active refrigeration mode will run for a minimum
of 5 minutes (adjustable via Cmp. Min Run Time; see page 8).
When the space temperature drops below the Space Temp Setpoint, the EXV will
close forcing a pumpdown, and the fans will cycle to half speed. In order to
prevent compressor short cycling, this inactive mode will run for a minimum of
2 minutes.
When the space temperature rises 2 degrees above the Setpoint (can be adjusted
via Setpoint Control parameter), the EXV will start metering again and then
fans will cycle back to full speed.
NOTE: If there is a power loss, the controller will close the EXV to force a
pumpdown. When power is restored, the controller will go through its initial
startup before resuming refrigeration functions again.
Defrost Mode
Timed Defrost (default setting)1
With the controller set to Timed defrost, the defrost start time will vary
depending on compressor run time. The controller will automatically start
defrost when the Def. Comp. Run Time has elapsed (default 360 minutes), or
manually when set by the user on the display ServiceDefrost ControlStart
Defrosting.
To set Defrost Type to Timed Defrost, navigate via the display to
SettingsEquipmentDefrost Type, and select Timed.
To adjust the runtime until next timed defrost, navigate via the display to
SettingsEquipmentDef.Cmp.Run Time and adjust the desired time.
NOTE: When the unit is actively cooling the space (EXV is metering, fans
running at full speed) the controller is counting runtime towards the next
defrost. When the space temperature Setpoint is satisfied (EXV closes for
pumpdown, fans running at half speed) the controller does not count this as
runtime towards the next defrost.
Adaptive Defrost (optional setting)2
With Adaptive defrost selected, the controller continuously monitors coil
operation as indicated by EXV position over time and by temperatures. When
both EXV and temperature conditions degrade past a certain point for a long
enough period of time, the controller will automatically start a defrost
cycle. At the same time, the controller keeps track of compressor runtime, and
if the EXV and temperature conditions are not met, a defrost will be started
anyway after the Def. Adpt. Run Time (default 720 minutes) has expired. In
other words, the controller will always start a defrost when the set runtime
has expired, but it may also defrost beforehand if the EXV and temperature
conditions are met. Alternatively, a defrost can be manually started by the
user via the display by navigating to ServiceDefrost ControlStart Defrosting.
To set Defrost Type to Adaptive Defrost, navigate via the display to
SettingsEquipmentDefrost Type, and select Adaptive.
To adjust the maximum runtime for adaptive defrost, navigate via the display
to SettingsEquipmentDef.Adpt. Run Time, and
1 All software versions 2 Feature available with controller software version
HT-PG01-00-01-22 or newer.
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Installation and Operations Manual
Defrost Mode continued
adjust the desired time.
NOTE: Adaptive defrost is only available when the controller is set to
Freezer. If the controller is set to Cooler, Timed defrost will always remain
as the functional setting.
When a defrost cycle starts, the EXV will close for pumpdown.
· If unit is set as “Freezer” the electric heaters will be energized via the
defrost relays, and the fans will cycle off. Defrost will end when evaporator
coil reaches termination temperature or when Max. Defrost Run Time has elapsed
(whichever comes first). The unit will then begin a 5 minute drain time. After
the drain time has elapsed, the unit will resume normal refrigeration
operation: EXV opens immediately and fans start when Evap Temp gets below a
preset temperature. If Drain Temp sensor is installed and configured, the
controller will monitor the drain pan temperature and generate an alarm if the
drain pan does not get warm enough during a defrost cycle.
· If unit is set as “Cooler” the fans will cycle to half speed. Defrost will
end when evaporator coil reaches termination temperature or when Max. Defrost
Run Time has elapsed (whichever comes first). After the defrost cycle ends,
the unit will resume normal refrigeration operation: EXV opens immediately and
fans start when Evap Temp gets below a preset temperature.
NOTE: If controller has software version HT-PG01-00-01-18 or later, fans will
run at 100% speed during air defrost cycle.
The remaining runtime until next defrost can be viewed on the display by
selecting StatusDefrostNxt. Def. Comp. Time.
The elapsed time for the last defrost can be viewed on the display by
selecting StatusDefrostLast Defr. Time.
A defrost cycle can be stopped prematurely via the display if desired. At the
display, select When a defrost cycle starts, the EXV will close for pumpdown.
NOTE: If there is a power loss while the unit is in the middle of a defrost
cycle, the controller will keep the EXV closed. When power is restored, the
controller will go through its initial startup before resuming the defrost
cycle. When the defrost cycle ends, the controller will resume refrigeration
functions.
Recommended Freezer Defrost Parameter Settings
a. Low Profile Evaporators: Set Defrost Termination Temperature between 55°F
and 65°F; set Defrost Pulse Override to Yes or No, depending on conditions of
the Freezer.
b. Center Mount Evaporators: Set Defrost Termination Temperature between 35°F
and 40°F (adjust as necessary if defrost cycle is too long and steaming
occurs); set Defrost Pulse override to Yes; Coil Type should be set to Dual.
c. If defrost cycle is too long, keep in mind that the Max Defrost Time can
also be adjusted down to terminate defrost before steaming occurs. Default is
60 minutes.
d. If more defrost cycles are desired, the Runtime Until Defrost can be
adjusted down so the unit will defrost
more often throughout the day. Default is 360 minutes (6 hours of runtime).
Test/Service Mode
If the user desires to temporarily disable the system without disconnecting
power to the unit, at the controller display select SettingsSystem EnabledNo.
This function forces system pump down (EXV closes) and the fans turn off. The
sensor inputs (temperatures, pressure, etc.) are still functional and can be
viewed on the display. To restart the system and enable cooling again, at the
display select SettingsSystem Enabled Yes.
Diagnostics
The following sensors are continuously monitored and an alarm is generated in
case of failure. A red LED at the controller board will light up to indicate
active alarms. The active alarm automatically clears once the sensor is
repaired or replaced. Currently active alarms can be viewed on the display by
selecting ServiceCurrent Alarms. Any previously active alarms can be viewed in
the display by selecting ServiceAlarm History.
1. Space Temp a. On failure, Cooling ON and OFF periods are run based on
previous cycle averages.
2. Evap Temp a. On failure, defrost cycle will run until max defrost time (60
minutes) has elapsed.
3. Evap Temp 2 (Not applicable on Low Profile Evaporators) a. Same as Evap
Temp 1, but only if Evap Coil Type = Dual
4. Suction Temp a. On failure, EXV remains open at a fixed position. No
superheat calculation is available.
5. Suction Pressure a. On failure, Evap Temp will be used with Suction Temp
to obtain approximate superheat calculation. If Evap Temp sensor input has
also failed, EXV to remain open at a fixed position.
6. Drain Temp (if applicable)
1 All software versions 2 Feature available with controller software version
HT-PG01-00-01-22 or newer.
12
EcoNet® Enabled Unit Coolers
Group Operation
The EcoNet application supports multiple evaporator controllers to be
connected together and work under a Leader/Follower setup as shown below. A
maximum of 6 evaporators (1 Leader plus 5 Followers) can be configured on to a
single group, and a maximum of 4 groups can be connected on to the same
communication bus (see Figure 9).
When multiple controllers are addressed and connected to work as a group as
shown below, the Leader of each group will command its followers when to cool
the space, when to pump down, and when to start a defrost. Each group will
work from a calculated average space temperature to determine if the space
needs cooling. When a group is in active cooling mode, each evaporator in the
group will meter its own EXV based on its individual superheat calculation.
The Leader will keep track of the system runtime and command the Followers in
its group to start a defrost cycle as necessary. When a defrost cycle ends,
the Leader will command the Followers in its group to start cooling the space
simultaneously after every member of the group has finished defrosting.
Each controller to be connected on the communication bus should be powered up
and addressed individually before being connected to the other controllers in
the daisy chain.
When setting up a group for the first time, the following parameters only need
to be set at the Leader. The Leader will broadcast these settings to any
connected followers in its group.
1. Setpoint1 2. Refrigerant1 3. Cooler/Freezer1 4. Runtime Until Defrost,
Timed (Def. Cmp. Run
Time)2 5. Defrost Pump Down Delay2 6. Defrost Type3 7. Runtime Until Defrost,
Adaptive (Def. Adpt. Run
Time)3
NOTE: When linking multiple controllers in a group, make sure that every
controller within a group has the same software version.
Group Member List
No G1-L G1-2 G1-3 G1-4 G1-5 G1-6 G2-L G2-2 G2-3 G2-4 G2-5 G2-6 G3-L G3-2 G3-3
G3-4 G3-5 G3-6 G4-L G4-2 G4-3 G4-4 G4-5 G4-6
Description Standalone Unit Group 1 Leader Group 1 Followers
Group 2 Leader Group 2 Followers
Group 3 Leader Group 3 Followers
Group 4 Leader Group 4 Followers
Figure 9
To address each individual controller via the display select
SettingsEquipmentGroup Member Cfg.
In order to set up the communication bus, multiple controllers have to be
wired together on a “daisychain” configuration. To “daisy chain” the units on
the network, each unit should be connected to the EcoNet communication
terminals (E1, E2, RT) as shown below and in Figure 11 on page 27 and Figure
12 on page 28
· Use minimum 18 to 22 AWG shielded cable with shunt capacitance of 16 pF per
foot and 100 ohm impedance.
Group Leader/Follower
Setup
1 All software versions
2 Feature available with controller software version HT-PG01-00-01-18 or
newer.
3 Feature available with controller software version HT-PG01-00-01-22 or
newer.
13
Installation and Operations Manual
Group Operation continued
· Ensure that communication wiring polarity is consistent on all controllers
being wired together.
· A maximum of 32 devices including the Command Center can be daisy chained
together on a single communication bus.
· Maximum wiring length of communication bus from first device to last device
is 1,000 ft.
· The controllers can be wired in any order.
Door Switch1
The EcoNet evaporator controller can be paired with a door switch to pump down
the system and turn off the fans. Please follow the steps below to wire and
configure a door switch.
1. Wiring the Door Switch
Wire door switch or toggle switch to Digital Input #1 (terminals 1A and 1B)
using 18-20 AWG wire.
Input is a dry contact; no external voltage source needed.
2. Configuring the Door Switch continued
Use UP or DOWN buttons to adjust to desired door switch operation. Press SEL
button again to confirm change.
Default setting is “Off”; can be configured as Normally Open (N.O.), or
Normally Closed (N.C.).
3. Normally Open (N.O) Door Switch Active StateClosed contact: System runs. Digital Input #1 (Door Switch Input) displayed on Status screen as ON.
2. Configuring the Door Switch
Use the UP/DOWN/SEL/BACK buttons to navigate to SettingsEquipment.
Under Equipment, navigate to Door Sw. Config.
Press SEL button, default setting (Off) will start flashing.
1 Door Switch Feature available with controller software version HT- PG01-00-01-18 or newer.
14
EcoNet® Enabled Unit Coolers
3. Normally Open (N.O) Door Switch continued
Inactive StateOpen contact: System pumps down, fans turn off. T003 Door Open
Alert is generated. Digital Input #1 (Door Switch Input) displayed on Status
screen as OFF.
4. Normally Closed (N.C) Door Switch continued
Inactive StateClosed contact: System pumps down, fans turn off. T003 Door Open
Alert is generated. Digital Input #1 (Door Switch Input) displayed on Status
screen as ON.
4. Normally Closed (N.C) Door Switch Active StateOpen contact: System runs. Digital Input #1 (Door Switch Input) displayed on Status screen as OFF.
Configuring Door Switch Delay1
Use the UP/DOWN/SEL/BACK buttons to navigate to SettingsEquipment.
Under Equipment, navigate to Door Sw. Time.
Press SEL button, default setting (0 sec) will start flashing. Use UP or DOWN
buttons to adjust to desired delay. Press SEL button again to confirm change.
Default 0 second delay: system will pump down and fans turn off immediately
when Door Open Alert is generated.
Delay can be configured for 30 seconds, 1 minute, 2 minutes, 3 minutes, 4
minutes or 5 minutes.
With Door Switch configured as N.O. or N.C., contact has to be in its inactive
state continuously for the configured Delay time before Door Open Alert is
generated, system pumps down and fans turn off.
1 Door Switch Feature available with controller software version HT- PG01-00-01-18 or newer.
15
Installation and Operations Manual
Configuring Door Switch Delay1 continued
Door Switch Sequence of Operations1
With Door Switch configured, T003 Door Open Alert will cause system to pump
down and fans to turn off immediately when Digital Input is in its inactive
state (open contact for N.O. or closed contact for N.C.). With Door Switch
configured as N.O. or N.C. and with a configured Delay, contact has to be in
its inactive state continuously for the configured Time Delay before Door Open
Alert is generated, system pumps down and fans turn off. Once system pumps
down and fans turn off, a 2 minute minimum off time is observed where the EXV
will remain closed regardless of Door Switch Input status. After Digital Input
changes back to its active state and remains there for 5 seconds, the T003
Door Open Alert will clear and system will be allowed to run again. If input
changes back to its active state before the 2 minute minimum, fans will run at
50% speed. After the 2 minute minimum, cooling mode resumes (EXV opens, fans
cycle to 100% speed). If Door Open Alert is generated during a defrost cycle
(Air or Electric), defrost cycle continues unaffected. There is a mandatory 5
minute minimum cooling period following the defrost cycle, regardless of Door
Switch input status. NOTE: The Door Open Alert does not reset the Space
Temperature Alarm delay timer (set by Cmp. Max. Run Time under Settings) , nor
does it clear the “A108 Cooler/ Freezer not Satisfying Setpnt. Alert” once it
has been generated.
Door Switch Sequence in a Group1
Only the group Leader needs the Door Switch wired and configured.
T003 Door Open Alert is generated at Leader when input is in inactive state
for the configured Delay. Follower evaporators will receive pump down command
from Leader and their fans will turn off.
Minimum 2 minute off time applies to entire Group. If Digital Input at Leader
changes back to its active state before the 2 minutes are up, Leader and
Followers will turn their fans to 50% after the Door Open Alert is cleared.
After the 2 minutes have elapsed, Group resumes cooling as soon as the Door
Open Alert has cleared.
If Door Open Alert is generated during a defrost cycle (Air or Electric),
defrost cycle continues unaffected for the entire Group. There is a mandatory
5 minute minimum cooling period following the defrost cycle, regardless of
Door Switch input status.
Door Open Alert does not clear “A108 Cooler/Freezer not Satisfying Setpnt.
Alert” or reset its timer count.
Compressor Control (Packaged Refrigeration Units)2
The EcoNet Evaporator Controller can be set to cycle the compressor ON or OFF
via Aux Relay 2 by configuring the Aux Relay Config. setting to Comp-Fan
Control. The controller will use the Suction Pressure transducer reading to
determine if the compressor needs to run. This setting is required for
Packaged Refrigeration Units.
NOTE: Controller version HT-PG01-00-01-23 or newer is required for Packaged
Refrigeration Unit configuration.
Relevant controller configurations for Packaged Refrigeration Unit compressor
operation (see Parameters List on page 8 for complete list of configuration
settings):
Configuration Aux Relay Config. Cut-Out Setpoint
Cut-In Offset
Adjustment Range
Default Setting
Comp-Fan Control; Fan Control
“Comp-Fan Control”
“0 PSIG” for Freezer -2 PSIG to 60 PSIG units;”20 PSIG” for
Cooler units
10 PSIG to 50 PSIG
“20 PSIG”
1 Feature available with controller version HT-PG01-00-01-18 or newer 2 Feature available with controller version HT-PG01-00-01-23 or newer
16
EcoNet® Enabled Unit Coolers
Configuration settings (Navigate to SettingsEquipment on controller display to
view/adjust):
1. Aux Relay Config. a. Comp-Fan Control: Controller will use Auxiliary Relay
1 for Evaporator Fan ON/OFF control, and Aux Relay 2 for Compressor ON/OFF
control based on Suction Pressure transducer reading. NOTE: This setting only
applies to Packaged Refrigeration
Units. Packaged Refrigeration Units MUST be set to CompFan Control or damage
to equipment will result!
b. Fan Control: Controller will use Auxiliary Relays 1 and 2 for Evaporator
Fan ON/OFF control and fan speed control. This setting is applicable for all
other evaporator unit models. Not applicable for Packaged Refrigeration Units!
Suction Pressure (PSIG) is greater than Cut-Out Setpoint + Cut-In Offset
To prevent compressor short cycling, the controller will keep the compressor
on for a minimum amount of time while the EEV is open, even if the Suction
Pressure briefly gets below the Cut-Out Setpoint.
When a cooling cycle ends (setpoint is satisfied, defrost starts, etc.) the
controller will close the EEV. The Suction Pressure will decrease with
compressor pumping down. The compressor will turn OFF when: Suction Pressure
(PSIG) is less than the Cut-Out Setpoint
When there is no call for cooling (EEV is closed), the compressor will turn
off immediately whenever the Suction Pressure drops below the Cut-Out
Setpoint.
Example 1 (Low Temperature Unit): Cut-Out Setpoint = 0 PSIG Cut-In Offset = 20
PSIG Compressor will turn ON when Suction Pressure is greater than 20 PSIG.
Compressor will turn OFF when Suction Pressure is less than 0 PSIG.
Example 2 (Medium Temperature Unit): Cut-out Setpoint = 20 PSIG Cut-In Offset
= 20 PSIG Compressor will turn ON when Suction Pressure is greater than 40
PSIG. Compressor will turn OFF when Suction Pressure is less than 20 PSIG.
2. Cut-Out Setpoint: Pressure setpoint at which the compressor will turn off when Aux Relay Config. Is set to Comp-Fan Control.
NOTE: If the unit is defrosting (air or electric), the controller will not allow the compressor to turn on. When the unit is not defrosting, the controller will allow the compressor to turn on for the next cooling cycle when the EEV opens, or for pump down if needed while the EEV is closed.
3. Cut-In Offset:Pressure differential for compressor to turn on when Aux
Relay Config. is set to Comp-Fan Control.
Compressor Operation
When a cooling cycle starts, the controller will open the Electronic Expansion
Valve (EEV) which will cause the Suction Pressure to increase. The compressor
will turn ON when:
Defrost Heater Pump Down Delay1
Configurable delay to allow compressor to pump down before electric heaters
are activated at the start of a defrost cycle.
Default setting is “None”; Heater relays are activated as soon as EXV is
closed.
Available delay configurations of 1, 2, 3, 4, or 5 minutes.
Only applicable when controller is configured as “Freezer”; delay will have no
effect if controller is configured as “Cooler.”
1 Feature available with controller software version HT-PG01-00-01-18 or
newer.
17
Installation and Operations Manual
Configuring Defrost Pump Down Delay1
Navigate to SettingsEquipment on controller display.
Scroll down to “Def.Pmp.Dn.Delay”
Press SEL button, default setting (None) will start flashing. Use UP or DOWN
buttons to adjust to desired delay. Press SEL button again to confirm change.
When “Defrosting” appears on display, the heater relays are active, and fans
turn off.
After defrost terminates (time or temperature), drain time will follow as
normal.
When defrost cycle starts, display will show “Initialize” for the duration of the delay. Fans cycle to 50% speed after EXV has closed.
Operational Limits
1. Voltage: 115V/230V 2. Operating Temp range: -40°F to 122°F 3. Operating
Humidity range: 0% to 97% RH
condensing 4. Groups/Leaders/Members: 32 devices max on daisy
chain; 1000 ft. max length from first device to last device on daisy chain 5.
Defrost Relay #1: 24A at 240VAC 6. Defrost Relay #2: 24A at 240VAC 7. Aux
Relay #1: 3A at 120VAC 8. Aux Relay #2: 3A at 120VAC
Replacement Parts/Numbers
1. Control Boards (08219624) 2. Sensors
a. Space/Drain Temp (08219623) b. Evap Temp (08219636) c. Suction Temp
(08219637) d. Suction Pressure (08219621) 3. Wire Harness a. 63″ Controller
wire harness, SER valve
(0821963501) b. 96″ Controller wire harness, SER valve
(0821963502) c. 126″ Controller wire harness, SER valve
(0821963503) 4. Controller Power Harness (08219638) For help with replacement
parts, e-mail or call our Parts Department at: parts@htpg.com or 1-855-HTPARTS
(1-855-487-2787)
1 Feature available with controller software version HT-PG01-00-01-18 or
newer.
18
EcoNet® Enabled Unit Coolers
EcoNet Command Center (if equipped)
The HTPG EcoNet Command Control Center is an intelligent device that provides
remote local control over HTPG EcoNet enabled evaporators in cooler or freezer
applications. It’s designed to be simple to operate with an intuitive
touchscreen interface for seamless control of both groups and standalone
systems.
Items Included in the Box
EcoNet Command Center
Wall Mounting Plate
Ferrite Toroid
Mounting Screws and
Drywall Anchors
Lens Cloth
Quick Start Guide
Safety Considerations
Failure to read and follow all instructions carefully before installing or
operating this control and system could cause personal injury and/or property
damage.
NOTE: All wiring must comply with national, local, and state codes.
WARNING: Power off your refrigeration system by using the master switch or
circuit breaker box. Verify that power is not present before beginning
installation.
Only a trained service professional/contractor should use or interact with the
control board.
Control Mounting Location
The EcoNet Command Center is an intuitive touchscreen interface allowing
complete control of individual and grouped EcoNet Enabled Unit Coolers. This
advanced unit provides a single interface to conveniently manage everything
from temperature to the most advanced system settings of all EcoNet Enabled
coolers and freezers on the EcoNet communication bus. It should be mounted
indoors outside the cooler enclosure and located where it is easily accessible
and visible to the business end user. Avoid mounting in high humidity areas.
Installation Instructions
The EcoNet System consists of several intelligent, communicating components.
Commands, operating conditions, and other data is passed continuously between
components. All system components can be controlled through the wall mounted
EcoNet Command Center providing the user with a single interface to
manage all features of the system.
The EcoNet Command Center remembers the system configurations of all connected
equipment. If the EcoNet Command Center needs to be removed or replaced the
refrigeration system will continue to operate normally and will keep its
configuration settings.
When connecting multiple standalone evaporator units to the EcoNet network
with a Command Center, use the “Network Instance” parameter (Settings
EquipmentNetwork Instance) to address each of them at the board display before
connecting them to the daisy chain communication bus (see page 8 for
Parameters List). When connecting evaporator units that will operate as a
group, use the “Group Member Cfg” parameter (SettingsEquipmentGroup Member
Cfg) to address each group member at the board display before connecting them
to the daisy chain communication bus (see Page 8 for Parameters list, page 15
for Group Operation). Multiple Standalone units and Group units can be
combined on the same daisy chain network with the Command Center, as long as
the wiring guidelines are followed (see page 17). A maximum of 32 devices can
be wired on the network, with a maximum 1,000 feet wire length from first
device to last device. The Command Center counts as one device and can be
wired on either end of the network (see Figure 11 on page 26 for wiring
diagram example). If the Command Center will be connected to Wi-Fi for Web
Portal use, then a maximum of 9 devices can be wired on the network (Command
Center plus 8 evaporator controllers). Please see Web Portal IOM for more
information.
NOTE: Read the entire instruction manual before starting the installation.
Operating conditions for the EcoNet Command Center: 0°C to 70°C (32°F to
158°F), 95% RH, Non-Condensing.
19
Installation and Operations Manual
Wiring Considerations
The EcoNet Command Center can be powered using only18AWG shielded wire from
the EcoNet control board up to 150 feet away. Wire should be free from defects
such as wear, cracks or anything that would hinder the conductivity of the
wire within the circuit.
NOTE: If the 16V power wires are shorted the unit cooler board will shut down
and cease operation until the short is corrected.
If the Command Center wiring will be located near or in parallel with high
voltage wiring, cable TV, Ethernet wiring or radio-frequency equipment, then
shielded thermostat wire can be used to reduce or eliminate potential
interference. The shield wire should be connected to the evaporator unit earth
ground. The shield wire should not be connected to the controller PCB. The
shield wire from all runs should be attached together and only grounded at one
evaporator unit. The shield wire should not be connected to any terminal at
the Command Center. Connecting the shield to ground at more than one location
can cause current loops in the shield, reducing shield effectiveness.
For distances over 150 feet an external isolated power supply is required and
will be connected to the R and C terminals of the EcoNet Command Center. An
AC/ DC wall mount adapter supply with a rating of 9V or
12V and 400mA or greater is acceptable. The EcoNet communication terminals (E1
and E2) can be wired using ordinary thermostat wire.
NOTE: Wiring only requires four wires. However, it is good practice to run
cable having more than four wires in the event of a damaged or broken wire
during installation.
Maximum wiring length of communication bus from first device to last device is
1,000 feet.
The units should be wired in a “daisy chain” and not in a “star” configuration
(see Figure 11 on page 26). To “daisy chain” the units on the network, each
unit should have a set of wires coming into it and one set going out of it.
The devices on the ends should have only one set of wires running to them. The
order of the devices in the network is not important. The EcoNet Command
Center has a six-terminal connectors labeled R, C, E1, E2, S1 and S2. The S1
and S2 terminals will never be used in this application.
CONTROLLER COMMUNICATIONS WIRING
Terminal
Function
R
Power – 24 VAC or 9-21 VDC
C
Common/Ground – 24 VAC
E1
EcoNet Communications Bus Wire 1
E2
EcoNet Communications Bus Wire 2
Figure 10 See Figure 11 on page 26 for typical wiring configuration with multiple controllers.
20
EcoNet® Enabled Unit Coolers
User Guide
System Mode
The EcoNet Command Center can be used to control cooler or freezer applications.
Selected Unit
Space Temperature
Menu Options See “Settings” section for adjusting options on the
Command Center.
Homescreen Overview
Alert Alert symbol will be displayed if there is an active alarm from any of
the units connected to the Econet network. Tap the alert icon to see the
active alarm(s) for the corresponding unit.
Motion Sensor
Temperature Adjustment Use the “+” and “-” to adjust box setpoint for the
selected unit.
System Set Point
Network
If multiple evaporators are wired to the network with the Command Center,
select the “UNITS” tab on the lower right corner to navigate back and forth
through the various units or groups currently active in the network. The
Selected Unit will be displayed in the Home Screen with its current Space
Temperature and Setpoint. If only one evaporator is connected to the Command
Center, the “UNITS” tab will not appear.
Assign Name to Unit/Group1
At the homescreen, touch and hold the Unit/Group line for 5 seconds to assign
a custom name. A keyboard screen (see below) will appear for the user to
manually enter a custom name for the system (i.e. Freezer #1, Meat Cooler,
etc.), then hit the Save button to confirm the name entry. The new custom name
will be displayed on the homescreen under the Unit/Group number. Each Unit or
Group connected to the Command Center can be assigned its own custom name for
easier identification.
Settings
Menu Options
Tap the Menu icon in the bottom left corner of the home screen to easily
configure basic and system level settings and view equipment status.
Settings (Menu > Settings)
Adjust system-level settings, preferences and time.
1 Feature available with Command Center version HT-H1RM-00-01-05 or newer.
21
Installation and Operations Manual
Basic (Menu > Settings > Basic)
Adjust basic settings for the local Control Center.
Alarm Beep Enable: Sounds an audible alarm tone shall a critical alarm
condition occur.
Screen Lock: To lock the main screen from any changes, enable screen lock. To
unlock, enter the Basic settings menu again and set Screen Lock to “No.”This
locking function prevents any changes except changes made from within the
Basic Settings.
Temperature Display: Changes the displayed space temperature and set points
between Fahrenheit and Celsius.
Proximity Sensing: This enables the Command Center screen to go into standby
mode after a short period of inactivity. The screen will wake up when the
Command Center proximity sensor detects motion near the screen. If Proximity
Sensing is disabled, the motion sensing is not used and the user will have to
touch the screen to wake up the display.
DST: At the bottom of this screen you can elect to enable or disable daylight
savings time. Enabling this setting will automatically update the clock for
Daylight Savings.
Status (Menu > Status)
Tapping Menu > Status will display the equipment operating status for the
selected EcoNet control board. Use the left < or right > symbols to quickly
navigate between control units.
Time and Date (Menu > Settings > Time)
Set the current time and date. Alerts and Alarms will be date and time stamped
so it is important the clock is programmed correctly. This configuration only
needs to be done once after all the controllers are addressed and connected
together; the Command Center will broadcast the new time and date settings to
all the controllers connected to the EcoNet network.
22
EcoNet® Enabled Unit Coolers
Service (Menu > Service)
Tapping Menu > Service from the home screen will display current alarms, alarm
history, support contact information, equipment info, test options and
network.
Support: Allows you to input the contact information for your preferred
contractor or install professional (company name, phone number and email
address), so that it’s always available should you run into any issues. Simply
use the on-screen keyboard to enter the appropriate contact information.
NOTE: You should always contact your preferred contractor or install
professional regarding alerts/alarms, performance issues or other questions
specific to your equipment.
Current: Shows currently active alerts and or alarms. When an equipment alert or alarm is present, an alertalarm icon will appear on the home screen, and the alarm beep will sound if enabled. Select the alert-alarm icon on the home screen to quickly view the alert or alarm and a brief description.
History: Shows a list of the past eight alerts/alarms with the time and date stamp.
Equip.: Displays the model, serial number and software version of all the connected equipment on the EcoNet communication bus.
23
Installation and Operations Manual
Test: The Test option will allow the user to run a manual defrost cycle. In
group configurations the manual defrost command through EcoNet Command Center
is only available for Group Leaders. Followers will start the defrost
simultaneously.
Network: Displays all of the connected units on the EcoNet communication bus.
Easily see group configurations and standalone units on one screen.
Loss of Communication with Controller1: The Command Center Display is
continuously monitoring communication status with any controller connected to
the daisy chain network, and will learn of any new addressed controllers as
soon as they are connected. If a previously connected controller loses
communication with the Command Center (due to loss of power, or disconnected
wire), the Command Center Display will stop showing temperature status at the
home screen for that device (see first image below), and will also show that
device grayed out on the Network Screen under the Status Menu (see second
image below). As soon as the device is reconnected, the Command Center will
resume communication with the device.
NOTE: Power cycling the Command Center will cause it to start over and re-
learn all the devices on the network.
1 Feature available with Command Center version HT-H1RM-00-01-05 or newer.
Caring for your Smart Refrigeration Control
Cleaning
You can clean your control screen by lightly spraying water on the provided
lens cloth or a clean microfiber cloth. Wipe the surface of the screen with
the dampened cloth. It is recommended you first lock the screen (Menu >
Settings > Basic > Screen Lock set to “Yes”).
NOTE: Never spray any liquids directly onto your EcoNet Command Center.
Rebooting
You can reboot your EcoNet Command Center by cycling power to the device.
Rebooting will not alter programming, settings or configuration options.
24
EcoNet® Enabled Unit Coolers
Installer Settings
Installer Settings Defaults
Object
Range
System Enabled
No/Yes
Run Time Until Defrost
0 to 900 Minutes
Defrost Max Run Time
10 to 60 Minutes
Default
Description
Yes
360 Minutes
If the user desires to temporarily disable the system without disconnecting
power to the unit select “No”
Set to configure the allowed compressor runtime before the unit goes into
defrost when controller is set to Timed defrost
60 Minutes Set to configure the maximum allowed defrost time
EXV Superheat Set Point Comp. Run Time Alert
Def. Term. Temp1 Def. Pulse Overr.1 Set Point Hysteresis Cooler/Freezer Select
Refrigerant Used Evaporator Coil Type Drain Sensor Installed
4.0°F to 20.0°F
0 to 480 Minutes
35 °F to 65 °F
Yes or No 0.5°F to 20.0°F Cooler or Freezer R448A, R407A, R407C, R449A, R404A,
R507A, R513A, R450A Single or Dual No/Yes
6.5°F
120 Minutes
55 °F (Freezer); 40 °F (Cooler) No
2.0°F
Freezer1
R448A
Single
No
Set to configure desired superheat set point
Set to configure the allowed compressor runtime until Space Temperature Alarm
is generated. If unit is actively cooling the space continuously for longer
than this time period, an alarm will be generated to indicate that box has not
achieved set point
Set to configure the Defrost Termination Temperature; the temperature that the
Evaporator has to reach in order to terminate the defrost cycle
Set to override the pulsing function of Defrost Relay 1 (Top Heater on a Low
Profile Evaporator) Set to configure desired hysteresis range for space
temperature control. When the space temperature rises above the set point by
the hysteresis value the system will generate a call for cooling
Set the controller for the type of operation it will be used in
Set the refrigerant that will be used in the system
Set for the type of evaporator being used. “Single” applies to Low Profile
evaporators. “Dual” applies to dual coil designs such as Center Mount
evaporators, where Evap Temp 2 sensor is used
Set to “Yes” if a drain temp sensor is installed
Aux Sensor Installed EXV Stepper Type
No/Yes 480 to 2500 Steps
Defrost. Pump Down Delay2
none/1 min/2 min/3 min/4 min/5 min
Defrost Type4
Timed/Adaptive
No
Set to “Yes” if an auxiliary sensor is installed
2500 Steps none Timed
Set to configure EXV type; 2500 steps or 480 steps. This should come preset
from the factory and should not be changed
Set desired delay for pump down before electric heaters become active at the
start of a defrost cycle. NOTE: This parameter only affects units that are set
to Freezer. See Defrost Heater Pump Down Delay section for more information.
Select desired defrost algorithm: Timed or Adaptive. NOTE: This only applies
if controller is set to Freezer. If controller is set to Cooler, Timed defrost
will always remain as the functional setting.
25
Installation and Operations Manual
Run Time Adapt. Defrost4
360 to 900 minutes
720 minutes
Door Switch Config.2
Off-NO-NC
Off
Door Switch Alert Time2
0 sec/30 sec/1 min/2 min/ 3 min/4 min/5 min
0 sec
Comp. Minimum Run Time3 3 min/4 min/5 min
5 min
Set to configure the allowed compressor runtime before the unit goes into
defrost when controller is set to Adaptive defrost.
Configure Door Switch function as Normally Open (N.O.), or Normally Closed
(N.C.) to enable Digital Input #1 to be used as contact for a door switch. See
Door Switch section for more information.
When Door Switch is configured to N.O. or N.C., use this parameter to set
desired delay to pump down the system when the Door Switch input (Digital
Input #1) becomes inactive.
Adjust the minimum compressor run time for each cooling cycle. When
refrigeration mode starts (EXV opens), the system will run for the minimum
time that has been set. After this minimum time has elapsed, controller will
pump down the system if Setpoint has been satisfied.
NOTE: Parameter will be automatically selected by the EcoNet Command Center by
detecting factory settings of the EcoNet Enabled Unit Cooler. For optimal
performance, the factory setting should not be changed. A trained service
professional/contractor may override the auto-populated default if necessary.
1 Feature available with controller software version HT-PG01-00-01-13
or newer. 2 Feature available with controller software version HT-
PG01-00-01-18
or newer. 3 Feature available with controller software version HT-
PG01-00-01-21
or newer. 4 Feature available with controller software version HT-
PG01-00-01-22
or newer.
Recommended Settings
1. Low Profile Evaporators
a. Coil Type: Single
installer settings. Tap the < and > symbols to navigate between different
units.
Note: If multiple standalone evaporators will be wired to the Command Center,
each evaporator must be addressed individually at the controller display via
the “Network Instance” parameter. If multiple evaporators will be wired to the
Command Center to work as a group cooling the same space, each evaporator must
be addressed individually at the controller display via the “Group Member Cfg”
parameter.
The previous < and next > symbols around the unit or group selection can be
used to quickly cycle through all of the units on the EcoNet bus to easily
change settings.
System Enabled: Allows user to temporarily disable the system without
disconnecting power to the unit. This function forces system pump down (EXV
closes) and the fans turn off. The sensor inputs (temperatures, pressure,
etc.) are still functional and can be viewed on the display.
b. Defrost Termination Temperature: 55°F for Freezers (electric defrost), 40°F for Coolers (air defrost).
c. Defrost Pulse Override: Yes or No for Freezers (electric defrost), depending on user preference/ box conditions; not applicable for Coolers (air defrost).
2. Center Mount Evaporators
a. Coil Type: Dual
b. Defrost Termination Temperature: 40°F for Freezers (electric defrost); 40°F for Coolers (air defrost).
c. Defrost Pulse Override: Yes for Freezers (electric defrost); not applicable for Coolers (air defrost).
Installer Settings (Menu > Settings > Installer)
To enter the Installer Settings menu, select Menu > Settings, then tap and
hold on “Installer” on the bottom right of the screen for five seconds. Use
the large left and right arrows to navigate
26
EcoNet® Enabled Unit Coolers
Run Time Until Defrost: Set to configure the allowed compressor runtime before the unit goes into defrost.
Def. Pulse Overr1: Allows the user to override the pulsing function of Defrost
Relay 1 (Top Heater on a Low Profile Evaporator). If the override of the
Defrost Relay 1 pulsing is not desired, set to “No” (Relay 1 will pulse). If
overriding the pulsing is desired, set to “Yes”; the Defrost Relay 1 will
remain energized for the duration of the defrost cycle (Relay 1 will NOT
pulse).
NOTE: Def. Pulse Overr. must be set to “Yes” on Center Mount, dual coil
evaporators for proper defrost performance.
Defrost Max Run Time: Set to configure the maximum allowed defrost time.
EXV SH Set Point: Set to configure desired superheat setpoint.
Comp. Run Time Alert: Set to configure the allowed compressor runtime until Space Temperature Alarm is generated. If unit is actively cooling the space continuously for longer than this time period, an alarm will be generated to indicate that box has not achieved set point.
Def. Term. Temp1: Sets the Defrost Termination Temperature.
NOTE: If the Cooler/Freezer parameter is manually adjusted, the Defrost
Termination Temp setting will revert back to default (55 °F for Freezer, 40 °F
for Cooler); if a value other than default is desired, make sure that
Cooler/Freezer is set prior to adjusting the Defrost Termination Temperature.
Set Point Hysteresis: Set to configure desired hysteresis range for space temperature control. When the system is in Refrigeration mode, if the Space Temp set point is -10°F with a default set point control differential of 2.0 dF, the unit will continue to cool the space until the Space Temp is just under -10°F. At this point, the system will pump down and run the fans at half speed. When the Space Temp rises to around -8°F, Refrigeration mode will start back up: EXV will open and the fans will run at full speed until set point is reached again or the unit goes into defrost.
1 Feature available with controller software version HT-PG01-00-01-13 or newer.
27
Installation and Operations Manual
Cooler/Freezer Select: Set the controller for the type of operation it will be
used in. If set as “Freezer”, the controller will use the defrost relays to
activate the electric heaters in the evaporator, and allow a drain time at the
end of the defrost cycle. If set as “Cooler”, the unit will operate as air
defrost (off-cycle).
NOTE: Parameter will be automatically selected by the EcoNet Command Center by
detecting factory settings of the EcoNet Enabled Unit Cooler. For optimal
performance, the factory setting should not be changed. A trained service
professional/contractor may override the auto-populated default if necessary.
Drain Sensor Installed: Set to “Yes” if drain temp sensor is installed.
Aux Sensor Installed: Not used.
EXV Stepper Type: Set to configure EXV type; 2,500 steps or 480 steps. This
should come preset from the factory and should not be changed.
Refrigerant Used: Set the refrigerant that will be used in the system from among the list of supported refrigerants. Default is R448A.
Evaporator Coil Type: Set for the type of evaporator being used. “Single” applies to Low Profile evaporators. “Dual” applies to dual coil designs such as the Center Mount evaporators, where Evap Temp 2 sensor is used.
NOTE: Followers in a group configuration will not be able to adjust the
following settings as these are configured by the leader:
· System Enabled · Run Time Until Defrost · Comp. Run Time Alert · Set Point
Hysteresis · Cooler/Freezer Select · Refrigerant Used · Defrost Pump Down
Delay · Defrost Type · Run Time Adapt. Defrost · Door Switch Config. · Door
Switch Alert Time · Comp. Minimum Run Time
28
EcoNet® Enabled Unit Coolers
Typical Wiring Configuration with Multiple Controllers and Command Center
Figure 11
NOTES 1. 1,000 feet maximum bus wire from first device to last device. 2. 32
maximum number of devices (including the EcoNet Command Center) connected to
same bus. 3. If the Command Center is being connected to a network consisting
of more than one EcoNet Controller, please
make sure that all controllers are properly addressed and wired to the network
before connecting the Command Center to said network. 4. See Figure 10 on page
18 for controller communications wiring.
29
Installation and Operations Manual
Typical Wiring Configuration with Multiple Controllers without a Command
Center
Figure 12
See notes on page 28
Due to continuing product development, specifications are subject to change without notice.
30
EcoNet® Enabled Unit Coolers
Addendum
Evap Temp Thermistor Resistance Table
Fahrenheit Kilo-Ohms
-40
346.62
-39
335.84
-38
325.06
-37
314.28
-36
303.50
-35
292.71
-34
281.93
-33
271.15
-32
260.37
-31
249.59
-30
242.04
-29
234.49
-28
226.95
-27
219.40
-26
211.85
-25
204.30
-24
196.76
-23
189.21
-22
181.66
-21
176.32
-20
170.98
-19
165.63
-18
160.29
-17
154.95
-16
149.61
-15
144.26
-14
138.92
13
133.58
-12
129.76
-11
125.94
-10
122.12
-9
118.30
-8
114.48
-7
110.66
-6
106.84
-5
103.02
Fahrenheit Kilo-Ohms
-4
99.20
-3
96.44
-2
93.68
-1
90.92
0
88.16
1
85.41
2
82.65
3
79.89
4
77.13
5
74.37
6
72.36
7
70.35
8
68.33
9
66.32
10
64.31
11
62.30
12
60.29
13
58.27
14
56.26
15
54.78
16
53.30
17
51.82
18
50.34
19
48.86
20
47.38
21
45.90
22
44.42
23
42.94
24
41.84
25
40.74
26
39.64
27
38.54
28
37.44
29
36.34
30
35.24
31
34.14
Fahrenheit Kilo-Ohms
33
32.22
34
31.39
35
30.57
36
29.75
37
28.92
38
28.10
39
27.28
40
26.46
41
25.63
42
25.01
43
24.39
44
23.77
45
23.15
46
22.52
47
21.90
48
21.28
49
20.66
50
20.04
51
19.57
52
16.29
53
16.22
54
16.14
55
16.07
56
16.00
57
15.93
58
15.86
59
15.78
60
15.42
61
15.06
62
14.70
63
14.33
64
13.97
65
13.61
66
13.25
67
12.88
68
12.52
Part no. 8219636
Fahrenheit Kilo-Ohms
69
12.24
70
11.96
71
11.68
72
11.40
73
11.12
74
10.84
75
10.56
76
10.28
77
10.00
78
9.78
79
9.56
80
9.35
81
9.13
82
8.91
83
8.69
84
8.48
85
8.26
86
8.04
87
7.87
88
7.70
89
7.53
90
7.36
91
7.19
92
7.02
93
6.85
94
6.68
95
6.51
96
6.37
97
6.24
98
6.10
99
5.97
100
5.83
101
5.70
102
5.57
103
5.43
104
5.30
32
Installation and Operations Manual
Space/Drain Temp Thermistor Resistance Table
Fahrenheit Kilo-Ohms
-40
169.16
-39
163.89
-38
158.63
-37
153.37
-36
148.11
-35
142.84
-34
137.58
-33
132.32
-32
127.06
-31
121.80
-30
118.13
-29
114.46
-28
110.79
-27
107.12
-26
103.45
-25
99.78
-24
96.11
-23
92.44
-22
88.77
-21
86.16
-20
83.56
-19
80.96
-18
78.35
-17
75.75
-16
73.15
-15
70.54
-14
67.94
13
65.34
-12
63.48
-11
61.62
-10
59.76
-9
57.90
-8
56.05
-7
54.19
-6
52.33
-5
50.47
Fahrenheit Kilo-Ohms
-4
48.61
-3
47.27
-2
45.92
-1
44.58
0
43.23
1
41.89
2
40.54
3
39.19
4
37.85
5
36.50
6
35.52
7
34.54
8
33.56
9
32.58
10
31.60
11
30.62
12
29.64
13
28.66
14
27.68
15
26.96
16
26.23
17
25.51
18
24.79
19
24.06
20
23.34
21
22.61
22
21.89
23
21.17
24
20.63
25
20.09
26
19.55
27
19.02
28
18.48
29
17.94
30
17.40
31
16.87
Fahrenheit Kilo-Ohms
33
15.93
34
15.52
35
15.12
36
14.71
37
14.31
38
13.91
39
13.50
40
13.10
41
12.70
42
12.39
43
12.09
44
11.78
45
11.48
46
11.17
47
10.87
48
10.56
49
10.26
50
9.95
51
9.72
52
8.10
53
8.07
54
8.03
55
8.00
56
7.96
57
7.93
58
7.89
59
7.85
60
7.68
61
7.50
62
7.32
63
7.14
64
6.96
65
6.78
66
6.60
67
6.42
68
6.25
Part no. 8219623
Fahrenheit Kilo-Ohms
69
6.11
70
5.97
71
5.83
72
5.69
73
5.55
74
5.42
75
5.28
76
5.14
77
5.00
78
4.89
79
4.78
80
4.68
81
4.57
82
4.46
83
4.35
84
4.24
85
4.14
86
4.03
87
3.94
88
3.86
89
3.77
90
3.69
91
3.61
92
3.52
93
3.44
94
3.35
95
3.27
96
3.20
97
3.13
98
3.07
99
3.00
100
2.93
101
2.87
102
2.80
103
2.73
104
2.66
32
EcoNet® Enabled Unit Coolers
Suction Temp Thermister Resistance Table
Fahrenheit Kilo-Ohms
-40
346.62
-39
335.84
-38
325.06
-37
314.28
-36
303.50
-35
292.71
-34
281.93
-33
271.15
-32
260.37
-31
249.59
-30
242.04
-29
234.49
-28
226.95
-27
219.40
-26
211.85
-25
204.30
-24
196.76
-23
189.21
-22
181.66
-21
176.32
-20
170.98
-19
165.63
-18
160.29
-17
154.95
-16
149.61
-15
144.26
-14
138.92
13
133.58
-12
129.76
-11
125.94
-10
122.12
-9
118.30
-8
114.48
-7
110.66
-6
106.84
-5
103.02
Fahrenheit Kilo-Ohms
-4
97.07
-3
94.39
-2
91.71
-1
89.02
1
83.66
2
80.98
3
78.29
4
75.61
5
72.93
6
70.97
7
69.02
8
67.06
9
65.11
10
63.15
11
61.20
12
59.24
13
57.29
14
55.33
15
53.88
16
52.44
17
50.99
18
49.55
19
48.10
20
46.66
21
45.21
22
43.77
23
42.32
24
41.25
25
40.17
26
39.10
27
38.02
28
36.95
29
35.87
30
34.80
31
33.72
32
32.65
Fahrenheit Kilo-Ohms
33
31.84
34
31.04
35
30.23
36
29.42
37
28.62
38
27.81
39
27.00
40
26.20
41
25.39
42
24.78
43
24.17
44
23.56
45
22.95
46
22.34
47
21.73
48
21.12
49
20.51
50
19.90
51
19.43
52
16.21
53
16.14
54
16.07
55
15.99
56
15.92
57
15.85
58
15.78
59
15.71
60
15.35
61
14.99
62
14.64
63
14.28
64
13.92
65
13.56
66
13.21
67
12.85
68
12.49
Part no. 8219637
Fahrenheit Kilo-Ohms
69
12.21
70
11.94
71
11.66
72
11.38
73
11.11
74
10.83
75
10.55
76
10.28
77
10.00
78
9.78
79
9.57
80
9.35
81
9.14
82
8.92
83
8.70
84
8.49
85
8.27
86
8.06
87
7.89
88
7.72
89
7.55
90
7.38
91
7.21
92
7.04
93
6.87
94
6.70
95
6.53
96
6.40
97
6.26
98
6.13
99
6.00
100
5.86
101
5.73
102
5.59
103
5.46
104
5.33
A member of the Rheem family of brands
3885 Crestwood Pkwy., Ste. 500 · Duluth, Georgia 30096 www.htpg.com · Phone: 800-288-9488, 256-259-7400 · Fax: 256-259-7478
References
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