rtu open board
TRANSCRIPT
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RTU Open Board
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RTU Open
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Equipment Touch for RTU Open
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EQT1-4-CAR i-Vu® Equipment Touch
Can be used as a thermostat on RTU’s with RTU open
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Comfortlink Scrolling Marquee
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LARGE COMMERCIAL EQUIPMENT ONLY
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Comfortlink Scrolling Marquee Basics
• Reading alarms press escape and enter at the same time
to display what the alarm is.
• Example T111 alarm is on the display press enter and
escape at the same time. Circuit B loss of charge is
displayed.
• Reset by scrolling to alarms press enter scroll to R.CUR
press enter Default password 1111 scroll up or down to
yes press enter alarm clears.
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System Vu Controls
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Some Light Commercial Units Have System Vu Controls
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System Vu Controls
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9 Lead Motor Wiring
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Aligning Sheaves
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Aligning Sheaves
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Commercial Start up
• Check and tighten all bearing collars and sheaves before
starting the unit
• The sheaves are not factory adjusted for airflow you may
need to turn the sheave in or out a turn or so when
adjusting the airflow.
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Department of Energy - 2018
JANUARY 1, 2018
MANDATORY – Manufacturers
This new DOE ruling will be the only federal requirement for IEER
NOT subject to state adoption.
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Staged Air Volume
• Energy Savings Up to 25%
• Code Compliant ASHRAE 90.1.2010
• Comfort Control Humidity Control
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To Increase IEER levels and meet DOE - 2018:
▪ Integrate SAV™ standard into 48/50TC-Q (6-27.5 ton) models.
▪ Integrate SAV™ standard into:
- Horizontal Only 48HC 17.5 and 20 Ton Models
- 48/50HC 10 Ton Models (Both 11 & 12 sizes)
▪ Integrate SAV™ standard into:- 40RU Split System Air Handlers
* Shown with field accessory display kit
*
Department of Energy - 2018
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Indoor Fan MotorBelt Drive
1st Stage Cooling = Fan at 66%
1st and 2nd Stage Cooling = Fan at 100%
Any Heating = Fan at 100%
(VFD)Speed Controller
SAV™ - Fan Automatically Adjusts To Unit Operation
Ventilation Only = Fan at 66%
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Stage Air Volume - SAV ™ Indoor Fan Motor
Saves Energy, Improves IEER – Great Payback)
Standard 2-stage
Thermostat
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VFD Location
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VFD Fan Board
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VFD Fan Board
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VFD Fan Board
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VFD Fan Board Wiring
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VFD Fan Board Wiring
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Small Medium Units VFD Wiring
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VFD Fuse Protection
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VFD Fuse Protection Update
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VFD Fuse Protection Update
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VFD Drives and AirFlow
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VFD Drives
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ABB Variable Frequency Drive
ACH550 ACS320
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How to determine the VFD Setting on a replacement
VFD
The replacement drive from RC comes with a
key pad so a different part number is used to
make sure the key pad is included.
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Control Panel Features ACH550 and ACS320
• Alphanumeric control panel with backlit LCD display– Easy monitoring - four-line display
• Three selectable actual values displayed simultaneously
– Supports • Start-up Assistant
• Fault indications and history
• Local / Remote control
– Removable: Connection with CAT5 cable
– Parameter upload/download (copy)
– Display with 16 languages
– Context sensitive Help key
– Real Time clock
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Control Panel – Button Functions ACH550 and ACS320
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Control Panel – Assistants (Say no) Do not use
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• Assistants simplify functions of Drive Operation . (Say no) Do not use
• Maintenance Assistant– Can be used to insert
preventative maintenance functions using run time, motor revolutions or events
• Diagnostic Assistant– Activated with a fault and
provides suggestions to correct fault based on the most common causes
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Control Panel – Parameters Mode
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• Parameters Mode– Allows monitoring of
signals in Groups 1,3 & 4(Read-out Only)
– Allows monitoring & editing of any parameters in groups 10-99
– Provides the avenue to commission the drive
– Start/stop, change direction and change control locations between Hand & Auto
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Control Panel – Fault Logger Mode
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• Fault Logger Mode– View the drive fault
history of a maximum of 10 faults (saves last 3 in memory after a power cycle)
– View the last 3 faults (saves details on last fault in memory after a power cycle)
– Provides help text for a given fault
– Reduces troubleshooting time
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Control Panel – Changed Parameters Mode
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• Changed Parameters Mode– Provides the means
to view parameters which have been changed with respect to default values for a given macro being utilized
– Very useful troubleshooting tool
– Allows user to edit changed parameters as well
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VFD Set-up Tables
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The VFD must be off when programming parameters
The VFD will not allow changes in the auto mode
All Carrier units do not come with VFD keypads
Never use the VFD to adjust airflow ! Adjust the sheaves
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VFD Keypad Use
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VFD TIC2019-0016
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Test and Balance VFD Bypass
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VFD Drives
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VFD Drives
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Accutrol Header
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Acutrol™ Tee Assembly
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Heat Pump Coils
Liquid LineCheck Valve
Check ValveAssembly
Check ValveAssembly
Liquid Line Filter Drier
Acutrol™ Metering Device
(located inside tee nipple)
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Accutrol Test
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• Disconnect the power to the unit to prevent hazard of electrical shock.
• Disable the indoor fan and remove freeze stat from evap coil.
• Install jumper between R and Y
• Restore power to unit and monitor refrigerant pressures.
• Observe the short sections of tubing after the accutrols.
• They should all freeze up within 30-45 secs of each other.
• If one or more freeze later or not at all, replace header or entire coil.
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High Flow Valve System
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Body part # EC39EZ065
Valve core part # EC39EZ067
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TXV’s
• 3 forces that govern TXV operation
• P1 the pressure created by the
Remote bulb and the power assembly
• P2 the evaporator equalizer pressure
• P3 the equivalent spring pressure of
The superheat spring
• The valve will assume a stable position when forces are in
Equilibrium (P1=P2+P3)48
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TXV Troubleshooting Flooding
• Undersized or inefficient compressor.
• Low superheat setting.
• Moisture.
• Dirt or debris.
• TXV seat leak.
• Oversized valve.
• Incorrect bulb position.
• Plugged equalizer tube49
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TXV Troubleshooting Hunting
• Valve oversized for application.
• Bulb location.
• Refrigerant distribution.
• Superheat adjustment.
• Moisture.
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TXV Troubleshooting Starving
• Moisture.
• Dirt or debris.
• Insufficient Delta P across valve.
• Undercharged system.
• Flash gas at inlet to TXV.
• Valve too small.
• Superheat adjusted too high.
• Power assembly failure or partial loss of charge.51
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TXV Bulb Mounting
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TXV Testing Procedure
• Step 1 remove the remote bulb of the expansion valve from the
suction line.
• Step 2 start the system and cool the bulb in a container of ice water,
closing the valve. As you cool the bulb, the suction pressure
should fall and the suction temperature will rise.
• Step 3 next warm the bulb in a container of warm tap water . As you
warm the bulb, the suction pressure should rise and the suction
temperature will fall.
• Step 4 If a temperature or pressure change is noticed, the expansion
valve is operating. No change is noticed, valve is restricted, the
power element is faulty, or the equalizer tube is plugged.
• Step 5 recover the charge, replace the valve and drier, evacuate and
recharge.
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TXV Overfeeding
• Overfeeding by the expansion valve results in high
suction pressure, cold suction line, and possible liquid
slugging of the compressor.
• Check for overcharge
• Check the operation of the valve as described in the
testing procedure.
• Check equalizer tube it may be plugged with brazing
material or restricted.
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TXV Underfeeding
• Underfeeding by the expansion valve results in low
system capacity and low suction pressures. If these
symptoms are observed
• Check for a restriction. Check the temperature across the
drier as it may be restricted.
• Check the operation of the valve as described in the
testing procedure.
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Commercial Splits
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Heat Pump Air Conditioner
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Commercial Splits
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Heat Pump Air Handler Cooling Only Air Handler
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Commercial Splits
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Commercial Splits
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Commercial Splits
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Commercial Splits
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Commercial Splits
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Commercial Splits
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Commercial Splits
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Commercial Splits
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Commercial Splits
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Commercial Splits
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Commercial Splits
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Commercial Splits
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Commercial Splits
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Commercial Splits
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Commercial Splits
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Commercial Splits
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Commercial Splits
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Commercial Splits
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Commercial Splits
• Please fully read the installation manual
• Correct piping is very critical
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Commercial Splits
• Factory charge is a holding charge only Refrigerant must
be added.
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Commercial Splits
• 40RUA air handler is cooling only
• 40RUQ air handler for heat pump applications
• Unit voltages 208/230/460
• Motors come wired for 460
• 208/230 applications you must wire 9 lead motor for low
voltage operation.
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Commercial splits
• 9 Lead Motor wiring
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Commercial Splits
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Copeland Digital Scroll
Digital compressor
solenoid
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Commercial Splits
• Copeland Digital Scroll
• Some units have digital scroll compressors which are
used for capacity control
• Digital Scroll operation
• Units with Digital scroll compressors will have DCS digital
compressor solenoid and CTD cycle timer device to
control loading and unloading
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Digital Scroll Compressors
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Electric Heat Single Point Kit
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Electric Heat Single Point Kit
• Single point kits are used when you have only one line
voltage power supply feeding the RTU.
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Electric Heat Single point kit
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Electric Heat Single Point Kit
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Electric Heat Single Point Kit
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Electric Heat Single Point Kit
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Electric Heat Single Point Kit
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Electric Heat Single Point Kit
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Electric Heat Single Point Kit
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Electric Heat Single Point Kit
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Electric Heat Single Point Kit
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Electric Heat Single Point Kit
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Electric Heat Single Point Kit
95
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Electric Heat Single point Kit
96
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DSB19-008
97
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DSB19-0014
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DSB19-0014
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Ecoblue Technology
• https://hvacpartners.com/Pages/MT/EcoBlue.aspx
100
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Introduction EXPO
101
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Product Offering
102
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New Blower Motor
103
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New Vane Axial Units UCB Board
104
Single Phase HK50AA055 Three Phase HK50AA058
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Single Phase UCB
105
Has 7 dip
switches
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Single Phase UCB
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LOW SPEED Dip 1 and Dip 2
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Single Phase UCB
108
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Three Phase UCB Board
109
Has 2 dip switches only
LOW SPEED
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Setting Air Flow
110
You must set up the airflow at start up on Eco Blue axial fan units
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Setting Airflow
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Different Charts Per Model
112
ADD to Voltage Selected From Above
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Axial Fan Troubleshooting
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114
Confirm Motor 10Vdc signal
Prism VAF Motor Troubleshooting
• Prism IDF motors supply the 10Vdc source signal that is then
adjusted by the “A-B-C” switches and potentiometer on the unit
control board for user speed setting
• To confirm 10Vdc from motor, Set Voltmeter to Vdc and touch
probes to bottom connection of User speed setting and top pin of
IFM plug on the Unit control board
• This should read 10V
Should read ~10Vdc
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Confirm User speed setting VDC
115
Should read user setting
between 4.1 Vdc-10Vd
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Confirm board output vdc signal
116
See note for Vdc reading
information
• Set Voltmeter to Vdc and touch probes across connections on JP1 of the unit
control board
• This Vdc reading should match per note below
• NOTE: If you are only using 24V at G to command fan speed for testing, output at
these pins will read the values below. This is because some units have a low
cool/vent speed setting.
– FC04-06: 100% of user Vdc setting
– FC07: 67% of user Vdc setting
– GC05-06: 75% of user Vdc setting
– To Confirm 100% fan speed matches user set point you can jump 24V to
Y2
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Confirm board output vdc signal
117The DC Voltage that controls the fan is supplied from the motor
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Mark Attendance and Final Test
118