Nibe Climacool CoolLogic UCA/W User manual

CoolLogic Touch Controller
Quick Start Guide
Doc#: C97B0083N10 | Created: August 30, 2023
For All Air-Source, Water-Source, and Remote Air-Cooled Modules
Models UCA/W/H/R
on
DEMAND
®
SIMULTANEOUS HEATING AND COOLING
9
5B0059N01

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CoollogiC TouCh CONTROLS QUICK START GUIDE
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UCA/W/H/R Table of Contents
ClimaCool works continually to improve its products. As a result, the design and specications of each product at the time for order may be changed
without notice and may not be as described herein. Please contact ClimaCool’s Customer Service Department at [phone] for specic information
on the current design and specications. Statements and other information contained herein are not express warranties and do not form the basis of any
bargain between the parties, but are merely ClimaCool’s opinion or commendation of its products.
USGBC and related logo is a trademark owned by the U.S. Green Building Council®and is used with permission. Modbus is a registered trademark of Schneider
Electric, licensed to the Modbus Organization, Inc. BACnet is a registered trademark of ASHRAE. Metasys is a registered trademark of Johnson Controls, Inc.
BACview is a registered trademark of Automated Logic Corporation.
3Introduction
4Establishing Communication and Conguring
Modules Present
5Conguring System Type and Application
6Cool and Heat Setpoints
6Free Cooling Setup
6Remote Reset and Demand Limiting Setup
7Controller Conguration
8CoolLogic Touch Controller Level Conguration
8Module Selector
8Flow Sensor Conguration
9Main Water and Ambient Temps
10 PID Setup
10 BinLoad
10 Startup and Mode Change
10 Select Trim Chill Modules
11 Standby Module Setup (N+1)
11 Enable Pump
12 Service Menu
12 Congure Regrigeration Sensors
12 Diagnostics Manual Mode
13 Reset Comp Runtimes and Cycles
13 Calibrate and Lock Temperatures
13 Alarm Lockout Reset
14 Verifying Communications with Modules
15 Status
15 Unload Status
15 Defrost Status
16 Module Level Conguration
16 Compressor Enable/Disable
16 Refrigeration Sensor and Alarms
17 Motorized Valve PID Settings
17 Heat Valve PID
17 Motorized Valve Option
18 Module Water Temp Limits
18 Compressor Settings
19 UCF Settings
19 UCA Fan Settings
19 Liquid Injection Congurations
20 Hot Gas ByPass Congurations
20 Defrost Setup
21 Defrost Load Limiting Setup
22 Contact Information
24 Revision History

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CoollogiC TouCh CONTROLS QUICK START GUIDE
Models:
UCA/W/H/R Introduction
This document outlines the quick start procedure for items that require conguration at initial system startup.
Additional ne tuning may be required depending on the system’s application.
This guide assumes the required software is installed on the CoolLogic Touch Controller and each of the Chiller
Modules in the bank. It is important to verify that all sensors’ input jumpers on the CoolLogic Touch and Module
Controllers are set properly per sensor type used (voltage, thermistor/dry contact, or current loop).

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CoollogiC TouCh CONTROLS QUICK START GUIDE
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UCA/W/H/R
Establishing Communication and
Conguring Modules Present
Use this guide after the software is installed and all devices are properly addressed. Address the
CoolLogic Touch Controller and Modules using the rotary dials on each control board. All control
boards require a power cycle after setting the address.
IMPORTANT: Save Settings.
After all conguration items are set as desired for the chiller bank, access the Conguration Screen
to save settings.
System Setup →Controller Conguration and select Backup Memory to save your settings.
After applied, verify the “VALID?” Indicator turns green.

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CoollogiC TouCh CONTROLS QUICK START GUIDE
Models:
UCA/W/H/R Conguring System Type and Application
Select System Setup from the Home Screen.
Chiller Module Type: Select the appropriate module type from the following options: UCW, UCH, UCR, UCA,
UCA-UCF, UCA-HP, UCH-HP, UCH-HR.
Chiller Control Type: Make your selection based on the bank application from the following options: Cool
Mode, Heat Mode, or Heat Recovery.
Chiller Control Source: This selects the start/stop method the chiller bank uses.
Keypad – Enable using the keypad and the three-way switch in the LOCAL position.
Digital Input – Enable with dry contact closure of the Remote Chiller Enable terminals within the
CoolLogic Touch Control Panel and the three-way switch in the REMOTE position.
BAS – Enable via BACnet points and the three-way switch in the REMOTE position and the contact closure
at the CoolLogic Touch Control Panel terminals 42 and 43 of LVTB1.
Enable Chiller from Keypad: Enables chiller operation when the three-way switch is in the LOCAL position
(both must be ON for the unit to run).
Use High Ambient Temp Limit: When ON, this disables unit operation in high ambient temperature conditions
(default 115°f). For UCA/UCF banks only.
Disable Heating Below: The ambient temperature setpoint below which heating is disabled. This applies only
to air source units. For UCA Heat Pump banks only.
Disable Cooling Below: The ambient temperature setpoint below which cooling is disabled. This applies only
to air source units. For UCA/UCF banks only.

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CoollogiC TouCh CONTROLS QUICK START GUIDE
Models:
UCA/W/H/R Conguring System Type and Application
COOL AND HEAT SETPOINTS
Under Local, select Hot (or Cool) water setpoint
and enter the desired setpoint for each mode. The
Min/Max for Load/Source Out is for bank safeties
where a breach in these values disables the unit
from running.
Input 8 and Input 10 settings are related to the
remote setpoint control functionality on the
CoolLogic Touch Controller.
FREE COOLING SETUP
Free Cooling Setup is the required conguration to
set up the UCF modules’ operation in a bank.
Enable Free Cool Modules: Enable Free Cooling if
Free Cooling modules are available.
Enable Free Cool Below: The maximum temperature
at which Free Cooling starts.
Enable Free Cool Above: The minimum temperature
at which Free Cooling stops.
Disable Free Cool Lockout: If the outside ambient
temperature (OAT) is less than the low ambient
temperature trip point, Free Cooling is disabled if this
option is selected.
Run All Free Cooling Modules Together: All Free
Cooling Modules stage up together instead of
waiting for each UCF to stage up individually.
The next UCF stages up only if the previous UCF
module is at max capacity (full fan speed) for at
least ve minutes.
Disable Mechanical Cooling: Enabling this disables
Mechanical Cooling from UCA modules when Free
Cooling is Enabled.
Water Valve Open Below OAT: The OAT setpoint
for Freeze Safety. When the OAT is at or below this
setpoint, the open/close water valve opens and the
mixing valve opens to the pre-set position.
Mix Valve Open Amount (3-8): The Mixing Valve
Position when Freeze Safety occurs.
Use UCF1 as a Smart Bypass: Fixes the UCF1 motorized
water valve to the open position when the bank is
o and a bypass is required.
REMOTE RESET AND
DEMAND LIMITING SETUP
Remote Setpoint target congurations and Demand
Limiting.
Sensor Input Function: Choose between HMI(None),
Remote Analog Target (Input 6), or BAS Target (0-10).
Sensor Input Type: Choose between 4-20mA or
2-10VDC for Remote Analog Target use.

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CoollogiC TouCh CONTROLS QUICK START GUIDE
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UCA/W/H/R Conguring System Type and Application
Target Min Reset: The minimum setpoint for Remote
Analog Target or BAS Target.
Target Max Reset: The maximum setpoint for Remote
Analog Target or BAS Target.
Active Reset: The active remote setpoint.
Sensor Input Oset: Input 6 (Cool) and Input 10 (Hot)
Sensor Oset.
Dem Lim Neg Reset: Input 7’s (0-10VDC) Demand
Limiting Minimum Setpoint Addition (Cool SetPoint)
or Subtraction (Heat Setpoint).
Dem Lim Pos Reset: Input 7’s (0-10VDC) Demand
Limiting Maximum Setpoint Addition Addition (Cool
SetPoint) or Subtraction (Heat Setpoint).
Dem Lim Active Reset: The Active Setpoint Addition
(Cool) or Setpoint Subtraction (Heat) from Demand
Limiting.
Dem Lim Oset: Input 7(0-10VDC) oset.
CONTROLLER CONFIGURATION
Backup Memory: Select this option to save the
current conguration to non-volatile memory.
This option also enables access to setup network
congurations for the device.

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CoollogiC TouCh CONTROLS QUICK START GUIDE
Models:
UCA/W/H/R CoolLogic Touch Controller Level Conguration
From the menu.
CoolLogic Touch Lockout Alarm Enter Passcode: The required Passcode to unlock the unit.
MODULE SELECTOR
Select the module size for each module in the
bank. If a module is not being used, leave the
size as “Not Used.”
Module Size Options are: Not Used, 20 Ton, 30 Ton,
UCF 20/30, 50 Ton, 70 Ton, 85 Ton, UCF 50/70.
If a module is equipped with either a Digital Scroll
compressor or a VFD compressor, the Variable
Capacity check box should be selected.
Find additional settings for compressor operation
(timers, variable compressor settings, and more) in
the Compressor Settings Screen.
FLOW SENSOR CONFIGURATION
COND Water Minimum Flow: The minimum ow psi
on Loop 2.
EVAP Water Minimum Flow: The minimum ow psi
required for Loop 1.
COND Input Status: The current ow reading for
Loop 2.
Input Oset: The oset for COND Input Status.
EVAP Input Status: The current ow reading for Loop 1.
Input Oset: The oset for EVAP Input Status.

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UCA/W/H/R CoolLogic Touch Controller Level Conguration
Use Low Di Press Filter: Prevents ow from dropping
immediately where the decrease in value is limited
by 1 psi every second.
The Minimum/Maximum for the Load (Cold Icon)
and Source (Hot Icon) must be set to match SETRA
DPT dipswitches. The SETRA DPT has multiple
choices for pressure ranges based on the dipswitch.
Example: If the 0-25 psi dipswitch is selected, then
Minimum and Maximum ow must be set to 0 and
25, respectively.
For Reference: Below is the possible SETRA DPT
congurations. The default Range Selection Switch
is D (25psi) and Electrical Output is A (4-20mA) for
general applications.
A B C D
MS1 50 25 10 5
MS2 100 50 20 10
MS3 250 125 50 25
ABCD
RANGES
ZERO
OUTPUT
ABCDBAR
A.REV
SLOW
BI-DIR
SWAP
PSI
NORM
FAST
UNI-DIR
NORM
REMOTE ZERO
4-20 MA
+-
+-
+
EXC. COMOUT
A B C D
4-20 0-5 0-10 1-5
Electrical Connections
Range Selection Switch Auto Zero Button Electrical Output Configurator
Calibrate the DPTs while the tubing is connected to
the appropriate piping and the pump is not running.
The pressure dierential should read 0.0. If not, conrm
that the tubing is properly connected, the pumps are
o, the DPT is wired correctly, and there is no air in the
lines. Adjust as needed using the OFFSET elds shown
in the Flow Sensor Conguration Screen.
Example: Flow Sensor Conguration (UCH SHC)
EVAP (LOAD COOL) MINIMUM DPT SENSOR PRESSURE SETPOINT
30 Ton 50 Ton 70 Ton 85 Ton
1.1 PSI 1.3 PSI 1.8 PSI 1.3 PSI
EVAP (LOAD COOL) MINIMUM DPT SENSOR PRESSURE SETPOINT
30 Ton 50 Ton 70 Ton 85 Ton
1.5 PSI 1.8 PSI 2.2 PSI 1.8 PSI
The values in the example are the absolute
minimum for a UCH-style chiller, but can be
set higher. These values are derived from the
respective heat exchanger pressure drops and
the operation limitations table, located in the unit
Installation, Operation, and Maintenance Manual
(IOM). A value of 0.5 psi is added to the result to
accommodate the additional pressure losses of
the piping between the heat exchanger and the
header, where the DPT sensor is located.
MAIN WATER AND AMBIENT TEMPS
Congure appropriate LO/HI Load/Src Water IN/OUT
depending on the brine used in the job site.
Cooling and Heating Low Ambient: Set these values
using the unit IOM.
Enable HP Operation Below: The OAT at which heat
pump operation is enabled.
HI Ambient Temp Unit Disable: Enable the HI Ambient
Limit option for air-source units.
HI Outdoor Air Temp: The OAT at which the air-source
units is disabled.
Use Average Outside Air Temp: Enable this option to
aggregate and average the ambient temperature
from all the modules.

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CoollogiC TouCh CONTROLS QUICK START GUIDE
Models:
UCA/W/H/R CoolLogic Touch Controller Level Conguration
PID SETUP
PID Congurations for both Heat Demand and Cool
Demand.
Recommended: Set PID tuning up to stage one
compressor up/down every 5-8 minutes.
Default:
• P-Gain: 16
• I-Gain: 0.40
• D-Gain: 0.0
• Rise: 6
• Fall: 32
• Deadband #1: 1.8
• Deadband #2: 0.0
• Switching Dierential: 3
BINLOAD
This time accumulator displays the capacity use of
the bank aggregated in hours.
START UP AND MODE CHANGE
Start-up Time Delay: The time delay before the unit
starts up.
Minimum mode Change Delay: The required delay
before the bank changes mode.
SELECT TRIM CHILL MODULES
Select Trim Chill Modules by selecting the box next
to the modules. Selecting multiple modules as
"Trim Chill" causes the trim module to be randomly
selected every time the bank stages up the rst unit
or stages down the last unit.

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CoollogiC TouCh CONTROLS QUICK START GUIDE
Models:
UCA/W/H/R CoolLogic Touch Controller Level Conguration
STANDBY MODULE SETUP N1
Use N+1 Operation: Enable N+1 Operation.
Module used as Fixed + 1: Select a xed Module to
be N+1.
Use Monthly Auto Rotation: Changes the N+1 module
every month.
Manually Rotate N+1 Module: Enable this to
increment the N+1 module to the next module.
Continue toggling to keep incrementing.
Module Currently in Standby: Displays the current N+1
module.
ENABLE PUMP
This screen is used only when an ON/OFF pump is
connected to BO3 on the CoolLogic Touch Controller.
If Enable Pump is selected, the pump is enabled.

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CoollogiC TouCh CONTROLS QUICK START GUIDE
Models:
UCA/W/H/R Service Menu
CONFIGURE REFRIGERATION SENSORS
Refrigeration Sensor Input Type: Choose between
Honeywell, Carel(default) or Custom. If Custom is
selected, the below values must be set.
Minimum/Maximum … Voltage – Signal Range
for the pressure transducer.
Minimum/Maximum … Pressure – Pressure Range
for the pressure transducer.
Minimum/Maximum … OOR Voltage – OOR fault
limit range for Signal
DIAGNOSTICS MANUAL MODE
The manual control for the system to test modules.
Current System Mode: Displays the current manual
mode.
Enable Manual Control: Enable Manual Mode.
Set System Mode: Set the Manual Mode.
Ignore Min ON/OFF Times: If enabled, the compressor
minimum runtime and minimum o time is ignored.
Each Module and its components have independent
manual controls, as shown.

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CoollogiC TouCh CONTROLS QUICK START GUIDE
Models:
UCA/W/H/R Service Menu
RESET COMP RUNTIMES AND CYCLES
Reset compressor runtimes and number of cycles for
each compressor.
CALIBRATE AND LOCK TEMPERATURES
Calibrate and lock the main temperature sensors for
diagnostic purposes.
ALARM LOCKOUT RESET
Conguration to clear module and CoolLogic Touch
Controller alarms.
NOTE: Alarms are removed only if the cause of the
alarm is solved/removed.

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CoollogiC TouCh CONTROLS QUICK START GUIDE
Models:
UCA/W/H/R Verifying Communications with Modules
Communication between the CoolLogic Touch Controller and Chiller Modules can be conrmed by entering
the module’s Status Screen from the Home Screen. Selecting a module image displays the Module Status
Screen for that module. From this status screen, refrigerant pressures and temperatures display as shown in
the gure below. If the module temperature or pressure eld displays the value 0.0, then communication
is not established with the module. Conrm proper rotary address settings, that the ARC156 daisy chain
communication string is correctly connected, and that power on all modules and the CoolLogic Touch
Controller has been cycled. The CoolLogic Touch Controller must be powered on last. It takes two to three
minutes for communication to be established to all modules.

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CoollogiC TouCh CONTROLS QUICK START GUIDE
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UCA/W/H/R Status
Overall system status and commands.
UNLOAD STATUS
Displays whether the modules or the compressors
are in unload status.
DEFROST STATUS
The bank is ready to start and run with the minimum
conguration completed. It is recommended that
you verify additional conguration settings that may
require adjustment for the intended application.

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CoollogiC TouCh CONTROLS QUICK START GUIDE
Models:
UCA/W/H/R Module Level Conguration ()
Review the settings in each menu displayed below to conrm they are correct for the chiller application.
Some of these settings are not available depending on the Module Unit Type selection in “CoolLogic Touch
Controller Level Conguration”.
COMPRESSOR ENABLEDISABLE
When the compressor’s "Disable" box is selected,
it is made unavailable for operation. This is useful
for preventing nuisance NO RUN alarms while the
compressor toggle switch is turned OFF. For normal
operation, do not disable the compressors.
REFRIGERATION SENSOR AND ALARMS
HI Discharge Pressure: Sets the threshold above
which the DISCHARGE PRESSURE ALARM is triggered
for the selected refrigerant.
HI Discharge Temp: Sets the threshold above which
the DISCHARGE TEMPERATURE ALARM is triggered for
the selected refrigerant.
Low Suction Pressure (Cool/Heat): Sets the threshold
below which the SUCTION PRESSURE ALARM is
triggered for the selected refrigerant in the selected
mode. Typically, this option only requires adjustment
when glycol is used in the cooling or source loop.

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CoollogiC TouCh CONTROLS QUICK START GUIDE
Models:
UCA/W/H/R Module Level Conguration ()
Low Suction Temperature: Sets the threshold below
which the SUCTION TEMPERATURE ALARM is triggered
for the selected mode.
Suction Alarm Time Delay: Sets the amount of time in
seconds that the module delays before triggering a
SUCTION TEMPERATURE or PRESSURE ALARM.
Alarms Available: Select the box to enable the
alarms listed. De-select to disable.
*Retries: The number of times a circuit unloads and
retries before the fault becomes active.
Comp Status Alarm Delay: Sets the amount of time in
seconds the module delays for the current switch to
close after starting the compressor before triggering
the COMPRESSOR NORUN ALARM.
Available Sensors: Select to enable out-of-range and
limit alarms for the selected refrigerant sensor.
MOTORIZED VALVE PID SETTINGS
Module SP Target Settings: The Suction Pressure valve
control target for water-source units.
Mot Valve PID Conguration: The Valve PID
conguration for water-source units.
HEAT VALVE PID
Valve PID settings for Discharge Pressure Control for
air-source units.
MOTORIZED VALVE OPTION
Alarm Delay: The delay between the valve open
command and valve feedback before an alarm is
triggered.
Smart Bypass: Select to lock the Module 1 motorized
water valve in the open position as an alternative to
a header bypass.
Heat Disc Prs Target: The Discharge Pressure target
for air-source unit valve control in HEAT MODE.

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CoollogiC TouCh CONTROLS QUICK START GUIDE
Models:
UCA/W/H/R Module Level Conguration ()
MODULE WATER TEMP LIMITS
Delay Time Trip: The time in seconds that the module
delays before triggering a freeze protection alarm.
Water Valve Open Below OAT:Sets the OAT threshold
below which the modules x open their water valves
(air-source units only).
Module Water Temp Limits: These are the LOW
and HIGH water OUT temperature limits for the
HEAT MODE and COOL MODE at the module sensor
locations. The LOW water temp limits typically
only require adjustment when glycol is used in the
cooling loop.
Water Retries: The number of times the module
retries operation before triggering a water
temperature fault.
Mod Cool/Heat Low OAT Operating Point: Sets the
OAT below which cooling/heating operation is
prohibited (air-source units only).
COMPRESSOR SETTINGS
Decreasing the default values for Comp Minimum Run
Time or Comp Minimum O Time is not recommended.
These values set the minimum ON and minimum OFF
times for all compressors. Do not change these settings
without consulting the factory, as doing so may cause
excess wear and tear on the compressors.
Compressor (1/2) Start Delay: The delay in
seconds before a module compressor runs after
being requested. This option typically requires no
adjustment. Default 90 sec for Comp 1 and 220
for Comp 2.
No-Run Alarm Delays: The delay in seconds before
a module level no-run alarm appears. This option
typically requires no adjustment.
No-Run Alarm Retry: The number of times the
compressor is allowed to try running after a
No Run Alarm.
Flip Lead/Lag Logic: Selecting this option reverses the
lead/lag rotation, so that C2 is lead and C1 is lag. This
rotates on a monthly basis.
Disable Lead/Lag Rotation: Selecting this option
disables lead/lag rotation so that the current lead
compressor will stay the lead compressor. De-select
to return to normal lead/lag rotation.
Variable Capacity Comps in Bank: Select this option
if any module in the bank utilizes a digital scroll
compressor or VFD.
Type of Variable Compressors: Compressor type
selection – choose between Digital and VFD. If no
variable compressor is used, select None.

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CoollogiC TouCh CONTROLS QUICK START GUIDE
Models:
UCA/W/H/R Module Level Conguration ()
VFD/Digital Minimum Output Voltage: Variable
compressor minimum low voltage DC signal output.
This option typically requires no adjustment. Default
7.5V for VFD type compressor and 2.4V for Digital
type compressor.
Variable Compressor Selection: This button directs
to the Module Selector Screen – select if using a
variable compressor and the previous items are
congured. Once at the Module Selector Screen,
select the check boxes for the module(s) that
contain a variable type of compressor.
UCF SETTINGS
UCF Congurations and PID setup for mixing valve
and fan control.
UCA FAN SETTINGS
Use Adaptive Head Pressure: Uses a custom curve to
match appropriate head pressure to ambient temp
(not recommended).
Head Pressure Target: The fan control to discharge
pressure in HEAT MODE. Initially, the fan controls to
100 psi less than this value before slowly letting the
control adjust to this value.
Max Outputs: The maximum fan speeds.
Fan Type: OFF or Rosenberg. If Rosenberg is selected,
a delay is introduced before the compressor starts.
Comp Delay for Fan Ramp: The delay before the
compressor starts so the Rosenberg fan can ramp
up from the initial OFF mode.
Fan Initial Speed: The initial ramp-up target for the
Rosenberg fan.
Fan PID: The PID values for fan modulation.
Enable Heat Mode Fan Load Limit: Enable suction
pressure control in COOL MODE.
Enable Heat Mode Suction Limit: The air-source
suction pressure target in COOL MODE.
LIQUID INJECTION CONFIGURATIONS
Liquid Injection Suct Press Heat Enable: To enable
Liquid Injection, suction pressure must be below this
setpoint in HEAT MODE.
Liquid Injection Suct Press Cool Enable: To enable
Liquid Injection, suction pressure must be below this
setpoint in COOL MODE.
Min Suction SuperHeat Enable: The minimum
SuperHeat to enable Liquid Injection.

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Models:
UCA/W/H/R Module Level Conguration ()
Liquid Injection Discharge Temp Enable: The
minimum Discharge Temperature to enable
Liquid Injection.
Liquid Injection Discharge Temp Disable: The
maximum Discharge Temperature to disable
Liquid Injection.
HOT GAS BYPASS CONFIGURATIONS
Bypass Min ON Time: The minimum time hot gas
bypass is open.
Bypass Max ON Time: The maximum time hot gas
bypass is open.
Suction Temp Low Enable: Enables Hot Gas Bypass at
and below this suction temperature.
Suction Temp High Disable: Hot Gas Bypass disabled
at and below this suction temp.
Delay to Oil Purge: The delay before the Oil Purge
sequence opens Hot Gas Bypass.
Max Oil Purge Time: The maximum time for the Oil
Purge Sequence.
Max SuperHeat Disable: Disables Hot Gas Bypass at
and above this SuperHeat.
Max SuperHeat(Liq Inj) Disable: Disables Hot Gas
Bypass at and above this SuperHeat if Liquid
Injection is ON.
Max Disch Temp Disable: The High Discharge
Temperature to disable Hot Gas Bypass.
Min SuperHeat Enable: Enables Hot Gas Bypass at
and below this SuperHeat.
DEFROST SETUP
Select Defrost Header Bypass Control: The Header
Bypass is locked open in defrost if this is enabled with
'Open Header Bypass in Defrost'.
Open Header Bypass in Defrost: The Header Bypass
is locked open in defrost if this is enabled with 'Select
Defrost Header Bypass Control'.
Disable Comps Waiting in Defrost: Bypasses delay so
the compressor comes on earlier in Defrost.
Disable Cond Fan While in Defrost: When enabled,
this option turns o the fan in Defrost.
(default: Enabled)
Ignore Comp Min On Time for Defrost: Ignores
Compressor Minimum On Time allowing the
compressor to turn o immediately when defrost
is done, and returns the compressor to HEAT MODE
faster.
Start Defrost ACLT Delta: The ACLT sensor trip to start
Defrost delay timer.
Maximum Time in Defrost: The maximum time a
compressor can run in Defrost.
Maximum Defrost Discharge Press: This is the Defrost
exit condition.
Disc Press > Max Before Exit Timer: This is the Defrost
exit condition delay before Defrost is ended.
OAT Defrost Enable Threshold: The maximum
ambient for defrost to occur.
Coil Freezing Time Before Defrost: This setting sets the
Defrost start delay.