TemperZone Econex OPA 560RLTFP User manual

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OPA 250–560 RLTFP (Econex) c/w UC8
Air Cooled Packaged Units - Reverse Cycle - R32
Installation & Maintenance
1. GENERAL
Temperzone OPA Outdoor Air Cooled Packaged units.
Follow these instructions to ensure the optimum performance,
reliability and durability.
Units must be installed in accordance with all national and
regional regulations and bylaws. National Health and Safety
regulations must be followed to avoid personal injuries.
The appropriate local permits must be acquired and
adhered to.
Local regulations on maximum boundary noise need to
be considered when positioning the unit.
The accompanying ‘R32 Handling Ducted Packaged Units’
pamphlet forms part of these Installation & Maintenance
instructions.
!WARNING
These units use R32 refrigerant (Class A2L) which is mildly
ammable.
The system shall be installed, operated and stored in a well
ventilated space. If the refrigerant gas comes into contact with
re, a poisonous gas may occur. Be aware that R32 does not
contain an odour.
If indoors, the appliance shall be stored in a room away from
continuously operating sources known to cause ignition of R32
refrigerant (for example an operating gas appliance or operating
electric heater)
This appliance is not intended for use by persons (including children)
with reduced physical, sensory, or mental capabilities, or lack of
experience and knowledge, unless they have been given supervision or
instruction concerning use of the appliance by a person responsible for
their safety. Children should be supervised to ensure that they do not
play with the appliance.
003-000-242 06/23
CONTENTS Page
1. GENERAL ..............................................................................1
2. INSTALLATION ......................................................................2
3. REFRIGERATION SYSTEM...................................................2
4. CONTROLS ...........................................................................3
5. START-UP PROCEDURE ......................................................3
6. OPERATION...........................................................................6
7. MAINTENANCE......................................................................6
8. TROUBLESHOOTING ...........................................................7
9. WARRANTY...........................................................................8
10. UC8 CONTROLLER DISPLAY.............................................8
APPENDIX I : PROTECTION FUNCTIONS ..............................9
APPENDIX II : AIR HANDLING PERFORMANCE...................11
COMMISSIONING CHECK LIST .............................................12

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2. INSTALLATION
2.1 Clearance
Refer to diagrams below and in supplied Specications
document for minimum clearances. If multiple units are to
be placed side-by-side then allow at least 2m between coil
faces.
Figure 1. Clearances
Plant Room Installation
Ensure sufcient ventilation is installed. Discharge air from
above the unit must be ducted away to prevent recirculation
of air through the unit. Restricted airow and/or recirculation
reduces efciency. Never install the unit in a totally
enclosed room.
Fresh Air Cowl Option
The Fresh Air weathercowl (weatherhood) is supplied
separately and must be tted to the unit – usually before
the unit is lifted in to place. There must be at least 300mm
clearance beneath the cowl once it is tted in place. Ensure
the tted cowl is not damaged when unit is lifted into
position.
*Economiser Cowl Option
The Economiser weathercowl (weatherhood) is larger
than the standard Fresh Air cowl and is supplied in kitset
form for on-site assembly and tting to the unit – usually
before the unit is lifted into place (refer separate kitset
instructions). There must be at least 300mm clearance
beneath the cowl once it is tted in place. Ensure the tted
cowl is not damaged when unit is lifted into position. Refer
Specication Sheet for additional clearances required.
2.2 Mounting
The unit should be fastened to a rm at horizontal base
using the holes supplied in the mounting channels, or using
universal beam clamps. When the unit is being installed
on a roof it is recommended that the unit is installed on a
substantial structure with vibration isolating mounts or pads.
Flexible duct connections are recommended between the
supply and return ducts and the unit.
Unit is shipped with blocks installed under the compressors.
Ensure these blocks are removed from the compressor feet
prior to starting the unit (not required for operation).
Factory lter frames are tted. Access to the lters is via the
return air access door.
2.3 Condensate Drains
Condensation can form on both the indoor and outdoor
air coils. This is normal during unit operation. It is
recommended the condensate be piped to a suitable
drainage point to prevent ponding and/or slippery mould
growth around the base of the unit.
An optional outdoor coil drain tundish is available (part 060-
000-635) with 25mm OD stub. Alternatively, for a drip free
installation a separate drain tray beneath the unit could be
used to drain condensate to a suitable drainage point.
Condensate drains should be ‘U’ trapped outside the unit.
The trap should have a vertical height of at least 100 mm.
The drain should have a slope of at least 1 in 50 and must
not be piped to a level above the unit drain pipe. (refer g. 2)
Figure 2. Condensate Drains
OPEN
DRAIN
MINIMUM
SLOPE
20 mm PER m
(1 IN 50)
100 mm
MINIMUM
200 mm
APPROX.
'U' TRAP
100 mm
APPROX.
VENT PIPE
FOR LONG
CONDENSATE
DRAIN RUNS
2.4 Air Filters
Standard lter sizes are specied on the Specications
Sheet. The return air chamber of the OPA unit can
accomodate 50 or 100 mm thick lters. Simply unscrew
and shift the ‘L’ shaped support brackets to the pre-drilled
positions in the top and bottom rails.
3. REFRIGERATION SYSTEM
3.1 General
These OPA models each have a single inverter compressor
to provide the exibility and economy of variable speed
operation. The compressor is very efcient at part load.
Each refrigeration system has been charged with R32
refrigerant; refer Specications document for amount.
3.2 Compressor
The compressor is an inverter scroll type. The compressor
lubricant is polyolester oil (POE). Note, this oil absorbs
moisture quickly if exposed to open air.
3.3 Economiser (Option) (Controls by Others)
When the outdoor air heat content (enthalpy) is below that
of the return air, the fresh air damper will open and the
return air damper close to provide the rst stage of cooling.
A spill air facility in the building may be necessary for when
the return air damper is closed. The fresh air damper should
return to minimum setting and the return air damper open
before the compressors are allowed to operate to provide
further cooling. Refer Section 7.6 for more information.
3.4 Fresh Air (Option)
Air ow through the damper should not exceed 25% of
the OPA unit’s nominal air ow. Excessive amounts of low
ambient fresh air will reduce the performance of a reverse
cycle OPA unit especially on heating cycle. Fresh air should
be adjusted to meet CO2sensing requirements.
The damper setting is dependant on the return air duct
static pressure and the design air ow for the specic
installation. It is recommended an air ow balance
commissioning contractor be utilised. Too much fresh air
introduction may void the OPA unit’s warranty.
OPTIONAL
FRESH AIR
WEATHER
HOOD
500 MIN. CLEARANCE
500 MIN. CLEARANCE
ELECTRICAL
ACESS DOOR
2000 MIN. CLEARANCE
FILTER
ACCESS
DOOR
1000 MIN. CLEARANCE TO UNIT*
1000 MIN. CLEARANCE
FAN ACCESS

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3.5 Pressurised Compartment
The compressor/electrical compartment can be pressurised
with indoor supply air. This assists in keeping dust out of the
compartment. Two plastic bungs are located near the top
of the common side-wall (refer Figure 3). Remove only the
bungs applicable to your type of unit – standard or opposite
hand; not both sets.
Figure 3. Pressurisation bung locations
4. CONTROLS
4.1 Electrical Requirements
Electrical work must be done by a qualied electrician.
DANGER! LIVE ELECTRICAL CONNECTIONS. DISCONNECT MAINS
POWER BEFORE WORKING ON UNIT. ONLY QUALIFIED PERSONS
WHO ARE COMPETENTLY TRAINED SHOULD PERFORM SERVICE AND
MAINTENANCE TASKS.
The outdoor unit must be wired directly from a distribution
board by means of a circuit breaker and a mains isolator
provided – preferably close to the unit.
A 24 hour power supply to the compressor crank case
heaters is required, otherwise the warranty is void.
4.2 Control options
OPA Econex units can be controlled using any of the
following options:
• TZT-100 wall thermostat
• SAT-3 wall thermostat
• 24V AC and 0-10V signals from an external controller or
thermostat
• Remote on/off switch and/or time clock
• Modbus RTU serial communications over RS485
connection
• BACnet-IP serial communications over Ethernet
connection (with optional gateway module)
Standard reverse cycle units are suitable for use with
thermostats and controls with manual heating/cooling
selection or automatic change-over.
A unit wiring diagram is supplied alongside the electrical
board and in the Specications document.
4.3 TZT-100 or SAT-3 wall thermostat
To connect the thermostat to the unit it is recommended
to use shielded twisted pair type cable, suitable for RS485
communications. Signals A and B should form one twisted
pair.
Note: The cable shield should connect to terminal ‘0V’ on
the UC8 controller only. Do not connect at both ends.
Connect the thermostat as follows:
TZT-100 Connection:
TB11 B2
TB12 A2
TB7 0V
TB8 12V
TB10
B
A
24C
24
PCLP1 TZT-100
OPA
TB11 B2
TB12 A2
TB7 0V
TB8 12V
TB10
B
A
GRND
12V
PCLP1 SAT-3
OPA
Control
- shielded
twin twisted pair
4 core
(201-000-399)
Control
- shielded
twin twisted pair
4 core
(201-000-399)
SAT-3 Connection:
TB11 B2
TB12 A2
TB7 0V
TB8 12V
TB10
B
A
24C
24
PCLP1 TZT-100
OPA
TB11 B2
TB12 A2
TB7 0V
TB8 12V
TB10
B
A
GRND
12V
PCLP1 SAT-3
OPA
Control
- shielded
twin twisted pair
4 core
(201-000-399)
Control
- shielded
twin twisted pair
4 core
(201-000-399)
Note: Capacity Staging. A TZT-100 or SAT-3 must be
congured for single-stage operation, the default setting.
TZT-100 has its own DIP switches that must be set as
follows:
DIP switch 2 ON Equipment type = Heat Pump
DIP switch 3 OFF Equipment stages = One
DIP switch 4 ON Reverse cycle valve on = Heating
SAT-3: Refer SAT-3 Installation Set-up Guide page 3.
4.4 Communications format for TZT-100 and SAT-3
Communications format must be set as per recommended
Modbus RTU:
• Baud rate (bd or br) 19200
• Data bits 8
• Parity Even
• Stop bits (Pa) 1
• TZT-100 address (Ad) 7
• SAT-3 address (Ad) 8
TZT-100:
The procedure to check and adjust these settings is:
1. Press and hold the O/RIDE button until the display
shows the PIN
2. Use the UP & DOWN buttons to select PIN code 88:21,
then press O/RIDE in installer mode.
3. Use the O/RIDE and PROG buttons to cycle through the
various installer settings.
If necessary, refer TZT-100 User Manual for more detail.
SAT-3:
The procedure to check and adjust these settings is:
1. Press and hold the MODE and 6 button until the display
shows the ‘i’ symbol.
2. Use the UP & DOWN buttons to cycle through the
various installer settings.
3. Press MODE button to save any new setting.
If necessary, refer SAT-3 Installation Set-up Guide for more
detail.
4.5 Remote on/off
The UC8 has an input for a remote on/off function on
terminal ‘On’, signal return is terminal ‘0V’. When used the
remote on/off terminals should connect to a voltage-free
relay contact. When not used the remote on/off terminals
should be shorted (‘bridged’).
4.6 Capacity control
OPA Econex units offer the following capacity control
options:
• Automatic control when the unit connects to the TZT-100
or SAT-3 wall thermostat.
• 0-10V compressor control signal
• 0-10V indoor fan control signal.
• Control by a building management system via Modbus
RTU or BACnet-IP serial communications.
Drawn: Title: Drawing No:
23/02/2022
pchandrasekaran
A
Rev:
Date:
©temperzone Ltd 2021
OPA 560 RLTFPQ-CZ (01, 10, 23, 32)
OPA 560 RLTFPQ-CZ Combined Variants
876-056-700
Est Weight:
0 kg
Sheet 1 of 1
*876-056-700/A*
3rd ANGLE PROJEC TION
Do not scale drawin gInterpret drawi ng as per GD&T standard: IS O 2768-1 Unless specifie d all dimensions are in millim eters
Mat:
Fin:
PROPRIETARY & CONF IDENTIAL
The information con tained in
this drawing is the sole
proprietary o f temperzone limited.
Unauthorised co pying,
possession, dis cussion, publicat ion
& distribution pr ohibited
TOLERANCES UN LESS STATED
LINEAR: ANGU LAR:
0 = ±0.5 0 = ±1°
0.0 = ±0.1 0.0 = ±0.5°
0.00 = ±0.05 0.00 = ±0.1°
Standard hand unit
Opposite hand unit

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4.7 Unit Controller (UC8)
The unit’s UC8 controller receives requests such as ‘Unit
On/Off’, ‘Start compressors’, ‘Activate HEAT (Reverse
Cycle)’ and transfer the requests to the outputs after
enforcing safety timers.
Figure 4. UC8 Controller
The Unit Controller provides several system protection
functions. These are covered in Appendix I (p.9).
For additional information, refer to the UC8 Controller label
on the unit or www.temperzone.biz for operation & fault
diagnostics information; model search ‘UC8’.
References available:
UC8 Operation Manual : Air-to-Air Units
UC8 Fault & Display Messages (as per unit label)
UC8 Quick Reference and Operation Fault Diagnosis
UC8 Troubleshooting Guide
UC8 Modbus Communications
UC8 BACnet Communications
UC8 Master-Slave Connection
4.8 Control using switched and 0-10V signals
An external controller that provides 12/24V ac/dc switched
signals or has a set of voltage-free relay contacts should be
connected as per the diagram below. If no fan/compressor
capacity control signals, then link UC8 terminals ‘VF’ and ‘5’
and ‘VC’ and ‘12’.
Figure 5. BMS connection
BMS /
external controller
Capacity
0-10V
HIGH
MEDIUM
LOW
COMP
HEAT
24V ac/dc
or
12V ac/dc*
24V ac COM
or
0V
0-10V
0V
Fan
HIGH IN
MED IN
LOW IN
FAN 0-10V
COMP 0-10V
COMP ON
HEAT ON
COM
OPA Terminals
*If using the unit’s
internal 12V dc
from UC8, add
this loop
0V
COM
Comp.
4.9 Control via Modbus RTU communications
OPA Econex units can be fully monitored and controlled via
Modbus RTU serial communications.
The following is typical for most installations:
• Set DIP switches 11 and 12 to OFF on all UC8 controllers.
• Connect BMS terminal A / TX+ to terminal A1 on the
UC8 controller via terminal block shown.
• Connect BMS terminal B / TX- to terminal B1 on the
UC8 controller via terminal block shown.
Multiple OPA units can be daisy-chained together.
For detailed information about monitoring and control
via Modbus RTU refer to document ‘UC8 Modbus
communications’, available at www.temperzone.biz (model
search ‘UC8’) or .com website.
4.10 Setting the UC8 Modbus device address
To view or change the Modbus device address of a UC8
follow these steps:
• Power up the unit but leave the compressors off.
• Hold down the SW3 pushbutton on the UC8 circuit board
until the display shows:
‘0’ [release] ‘1’ short press to ‘2,’ [long press] A,
[long press]
• The display will show the current Modbus device address.
The factory default address is ‘44’. [Short press] the button
to select higher numbers, for example press once to
change the address to 45, press twice for address 46 and
so forth. [Long press] to save the chosen address. After
address 99 the number returns back to 1.
• The controller returns to the default state (– ●).
4.11 Economiser Option (Controls by Others)
The Economiser package that is factory tted consists of
two opposed blade dampers, one for the fresh air and the
other for the return air and complete with individual damper
motors controllable from a 0 – 10V dc signal. The package
also includes a fresh air weathercowl supplied as a kitset
that must rst be assembled, then tted to the unitt –
usually before the unit is lifted into place.
The damper control will be factory wired such that the return
air damper will close proportionally as the fresh air damper
opens proportionally and vice versa. The fresh air damper’s
adjustable stop can be set such that it does not close
100%; many installations may require a minimum fresh air
introduction of 10 – 15% and the stop may be set on site to
facilitate this. Set the economiser Fresh Air Damper motor
‘stop’ to the equivalent negative static pressure as with
F/A damper closed. This is to ensure the air ow volume
remains constant and does not dramatically increase when
introducing fresh air. Failure to set the correct ‘stop’ position
could result in rain/moisture entrainment in the incoming
fresh air resulting in water deposited inside the unit.
As previously mentioned, a 0 – 10V dc control signal is
required to drive the dampers open and closed. This could
be from a BMS or a temperature/humidity controller.
LCD Display
Push button

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It is recommended that control is by Enthalpy (or by a
combination of dry and wet bulb temperatures) so that
free cooling is used without adding any heat load to the
building. This is a requirement of Australian NCC and NZ
Building Code. Control by dry bulb temperature alone is not
recommended as often, even though the outdoor dry bulb
temperature may be lower than that of the space, the total
heat content of the air can be higher thereby adding heat
load in the form of moisture content to the space.
If dry bulb temperature is used as the control method the
temperature must be set several degrees lower than the
space temperature to reduce the possibility of extra heat
load being introduced.
Air Quality (CO2) sensors can be used to proportionally
control the fresh and return air dampers (via the control
system).
In all situations the UC8 Unit Controller will allow the
compressors to operate with the economiser fresh air
damper open providing the refrigeration system is not
compromised.
The compressor(s) could be stopped from operating by
normal protection devices such as low suction temperature/
pressure or indoor coil frost protection and too many trips
of either fault could lead to a lock out of the compressor(s)
operation. Should this occur then a review of the control
settings may be necessary.
5. START-UP PROCEDURE
5.1 Before starting the compressor
1. Before working on the unit remove mains power from
the unit by opening the mains isolating switch.
2. Remove the shipping blocks from beneath each
compressor. Check that each compressor is securely
mounted.
3. Check the thermostat and/or other controls are
correctly wired to the unit.
4. Check tightness of electrical connections.
5. Check the air lters have been correctly installed, if
present.
6. Check that all indoor fan motors can freely rotate.
7. Apply mains power to the unit by closing the mains
isolating switch.
8. Check the supply voltage between each phase and
neutral.
9. Check air diffusers are open.
10. Before starting the compressors a four hour delay
period is required to allow the crankcase heaters to
drive any liquid refrigerant out of the compressor oil.
Mains power must be switched on during this four hour
delay period.
5.2 Commissioning
After the four hour delay period has expired (see step 10 in
section 5.1) complete the following procedure. You can use
the Commissioning Sheet (refer back page) to help you.
1. Place the UC8 controller in commissioning mode by
pressing and holding the SW3 push button (see Fig. 4)
until the display shows:
‘0’ [release] ‘1’ [long press] ‘t’; [short press] repeat
to nd ‘c’, then [long press] to select.
This Commissioning mode ‘c’ reduces the waiting
times at start-up and between cycles.for the next
half hour, or until the controller is reset by removing
power.
2. Start compressor in Cooling mode.
3. Check the outdoor fan motor runs smoothly.
Note: The outdoor fan does not necessarily start rotating
immediately after the compressor is started. The fans
may run-on for a short period after the compressor
stops.
Outdoor fan stops during outdoor coil de-ice cycles.
4. Measure the current draw on each phase to the
compressor motor and to each fan motor. Check the
readings against the specied values in the wiring
diagram or specication sheet.
5. The display and pushbutton on the UC8 can be used
to check temperatures and pressures. Short presses
on the pushbutton cycles through the available
options. Table 1 on page 8 shows, in sequence, what
information is available – with examples.
Alternatively use a set of pressure gauges suitable for
R32 refrigerant.
!WARNING
Under no circumstances shall potential sources of
ignition be used in the searching for or detection of
refrigerant leaks. If a leak is suspected, all naked ames
shall be removed/extinguished.
If a leakage of refrigerant is found which requires
brazing, all of the refrigerant shall be recovered from the
system, or isolated (by means of shut-off valves) in a
part of the system remote from the leak.
6. Repeat steps 2 to 5 for each compressor.
7. Test operation of the compressors when operating in
heating mode.
8. Check for desired supply air ow rate at each outlet.
9. Touch up any outdoor unit paintwork damage to prevent
corrosion.
10. Sign the check label.
5.3 Commissioning of variable speed (EC) indoor plug
fan
A unit equipped with variable speed (EC) indoor plug fan
allows adjustment of the fan speeds to obtain the desired
indoor supply airows.
Using TZT-100 option
If the unit is controlled with a temperzone TZT-100 wall
thermostat then adjustments are made as follows:
i. Ensure the compressor is off and the thermostat or BMS
does not request for the compressor to start. The UC8
display should show a ashing dot (●).
ii. To adjust the fan High speed press and hold down the
SW3 push button on the UC8 circuit board until the
display shows:
‘0’ [release] ‘1’ [long press] ‘t’; [short press] repeat
to nd ‘H’, then [long press] to select.
iii. The fan will start and run at High speed. The display
shows the fan control voltage for the High
speed setting; factory default value is 8.0V.
iv. Each following press on the SW3 push
button increases the indoor fan control voltage in steps
of 0.5V, up to a maximum of 10.0V. Pressing the push
button again when value 10.0 is shown returns the fan
control voltage down to the minimum value of 3.0V and
back up again.
v. When the desired setting for high fan speed is displayed,
[long press] to select and save. The controller then exits
the menu and the fan stops.
vi. To adjust the fan Low speed hold down the SW3 push
button on the circuit board until the display shows:
‘0’ [release] ‘1’ [long press] ‘t’; [short press] repeat
to nd ‘L’, then [long press] to select.
The fan will start and run at the Low speed setting. The
factory default value is 5.0V.

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vii. Repeat steps (iv) and (v) to adjust the fan Low speed
setting. The minimum control voltage for Low speed is
1V and the maximum control voltage for Low speed is
8V. (Note: A ‘low’ control voltage of less than 2V is not
recommended.) If ‘low’ is set higher than ‘high’, the ‘high’
is made equal to ‘low’.
viii Check if the High speed airow is to specication (refer
Note below)
Using SAT-3 option
If the unit is controlled with a temperzone SAT-3 wall
thermostat then adjustments are made as follows:
1. Activate fan setup mode: Hold down and ‘4’
button together for 3 seconds.
2. When fan setup mode is active symbol ashes on
and off.
3. Press OR to adjust the fan ‘low’ control
voltage up or down.
4. When the desired ‘low’ voltage is set then press
and repeat step 3 to set the fan ‘high” voltage.
5. When adjustment is complete press to exit fan
setup mode.
Using Alternative Thermostats
Follow same procedure as for TZT-100.
Note:
If fan speed selections are different from the factory default
values then the procedure above must be carried out for the
UC8 controller in the unit.
It is allowed to make the control voltages for low and high
fan speed equal. This makes the indoor fan act as a xed
speed fan.
It is allowed to control the indoor fan speed by an external
source, independent of the UC8 controller. It is then the
responsibility of the system-designer and installer to ensure
proper and safe operation of the indoor fan, and the system
as a whole, under all operating conditions.
Setting the indoor fan speed too low can bring risk of frost
forming on the indoor coil with potential nuisance frost
protection trips on cooling, possibly even unit lock-out, and/
or HP trips on heating.
Setting the indoor fan speed too high can bring a risk of any
condensation being sucked off the ns of the indoor coil
off the ns of the indoor coil and into the supply air duct.
Water could then start leaking from the supply air vents and
diffusers and corrosion of ducting may occur.
Setting the indoor fan speed too high can also bring a risk
of ‘over-condensing’ (when the unit is heating) which in turn
could cause the unit to perform more outdoor coil de-ice
cycles than necessary.
Refer Appendix II Air Handling graphs for min./max.
airows.
6. OPERATION
6.1 Safety timers
The UC8 receives control signals and transfers the signals
to the outputs after enforcing safety timers and other
protection functions. If the compressor is held off, or held
on, by a safety timer then the display shows
message ‘H-O-L-d’.
Normal durations of safety timers are:
• Minimum off time 3 minutes
• Minimum run time 1.5 minutes
• Min. cycle time 6 minutes (up to 10 compressor
starts per hour)
• Min. mode change-over time
10 minutes (cooling to heating or
vice-versa)
6.2 Variable Capacity
The OPA unit is equipped with a single variable capacity
compressor – inverter scroll type. Compressor operating
capacities are 16%–100% using 1.6V–10V control voltages.
At any time, when operating conditions dictate, system
protection functions can restrict unit operating capacity.
When a capacity signal is presented that is lower than the
minimum capacity (for example 0V on input ‘VC’) then the
compressor operates on minimum duty.
If a unit operates on low capacity for extended periods
then the unit may periodically perform oil ush cycles.
Under such operating conditions compressor lubricating oil
may slowly settle in parts of the refrigeration system other
than the compressor. Oil ush cycles help to return the
lubricating oil to the compressor. During an oil ush cycle
compressor speed is increased for a duration of 1 minute.
Variable capacity indoor air fan – Refer Section 5.3
7. MAINTENANCE
WARNING! HAZARDOUS VOLTAGE. ENSURE ALL POWER SUPPLIES ARE
ISOLATED BEFORE PERFORMING MAINTENANCE. FAILURE TO ISOLATE
POWER CAN LEAD TO SERIOUS INJURY.
7.1 Monthly
1. Check air lters, if tted, and vacuum or wash clean as
necessary.
2. Check condensate drain for free drainage.
3. Check compressor compartment for oil stains indicating
refrigerant leaks.
!WARNING
Under no circumstances shall potential sources of
ignition be used in the searching for or detection of
refrigerant leaks. If a leak is suspected, all naked ames
shall be removed/extinguished.
If a leakage of refrigerant is found which requires
brazing, all of the refrigerant shall rst be recovered
from the system.
4. Check system operating pressures via the UC8 (refer
Section 5.2.5).
7.2 Six Monthly
1. Check the tightness of electrical connections.
2. Check for signs of corrosion on electrical connections in
high salt atmospheres; replace where necessary.
3. Check the tightness of all fans, motor mountings.
4. Check system operating pressures via the UC8 (refer
Section 5.2.5).
5. Check and/or replace indoor air lters
6. Check condensate drain for free drainage.

- 7 -
7.3 Yearly
1. Check all refrigerant piping for chang and vibration.
2. Check the operation of electric heaters, if tted
3. Check air supply at all diffusers
4. Check for excessive noise and vibration and correct
as necessary.
5. Check for insulation and duct damage and repair
as necessary.
6. Check system operating pressures via the UC8 (refer
Section 5.2.5).
7. Remove lint and dust accumulation from outdoor
coil ns with soft brush or low pressure water spray.
8. Touch up any paintwork damage to prevent corrosion.
8. TROUBLESHOOTING
8.1 Room temperature varies signicantly from its setting
• Unit may have been incorrectly sized for the building.
• Drafts from wrongly placed supply air diffusers or from the
back of the wall plaque could be affecting the temperature
sensor built into the wall plaque.
• Poor air circulation in the room can cause incorrect
temperature readings.
• If using a BMS, check it has been correctly wired to control
the compressor capacity (Fig. 5).
8.2 Air conditioner does not seem to deliver the heating
when most needed
• Heating capacity at design conditions may be incorrect.
As the outside temperature falls, heat losses through the
walls, oor and ceiling increase.
• Check the unit’s brochure for information on the minimum/
maximum operating temperatures.
8.3 When heating, units have de-icing cycles built in to
remove ice on the outdoor coil.
• This usually means reversing the cycle for a few minutes
during which time there is no heating and in fact a little
cooling can occur.
8.4 In a new building, why does it take some days before
the air conditioning heat hump unit seems to work
properly
• Many new buildings, especially a commercial buildings,
have a large amount of concrete and other structural
materials that are generally cold and full of moisture.
This is most evident in the winter when trying to heat the
building from scratch.
8.5 Unit is leaking water
• Check the drain trap/vent/slope.
• Water carry-over: Reduce the maximum fan speed.
8.6 Air conditioner runs excessively – the temperature
remains too hot in summer or too cold in winter.
• Windows or doors may be opened to non conditioned
areas.
• Keep doors to unconditioned areas closed.
• Leaves, papers or other items blocking air ow over the
outdoor unit coil.
• Location of wall controller or remote temperature sensor is
incorrect.
• Check for leaks in supply or return air ductwork.
8.7 Outdoor unit displays an error code:
• Refer to UC8 Controller label on the unit for
operation & fault diagnostics information or visit
www.temperzone.biz; model search ‘UC8’.
9. WARRANTY
Please refer to the separate warranty document supplied with
the unit, or visit www.temperzone.biz for details.
Australia:
[e-mail]
[e-mail]
Telephone: [phone]
New Zealand:
[e-mail]
Telephone: 0800 TZWARRANTY (899 2777)

- 8 -
Table1,InformationavailableontheUC8display.
Item
Unit
Abbreviation
Examples
CompressorsuctionlinepressurekPaSLP
Suctionlinepressure1034kPa
Evaporatingtemperature°CEt
Evaporatingtemperature12°C
Compressorsuctionline
temperature
°CSLt
Suctionlinetemperature18°C
Compressorsuctionsidesuperheat K SSH
Suctionsidesuperheat6K
CompressordischargelinepressurekPadLP
Dischargelinepressure2447kPa
Condensingtemperature°CCt
Condensingtemperature42°C
Compressordischargeline
temperature
°CdLt
Dischargelinetemperature70°C
Compressordischargeside
superheat
K dSH
Dischargesidesuperheat28K
Deicesensortemperature
(locatedonfinsoftheoutdoorcoil)
°CICEt
Deicesensortemperature39°C
Capacity % CAP
Capacity100%
Expansionvalve1opening % EE1
Expansionvalve175%open
Expansionvalve2opening % EE2
Expansionvalve275%open



10. UC8 CONTROLLER DISPLAY

- 9 -
APPENDIX I
PROTECTION FUNCTIONS
The UC8 implements system protection functions such as
indoor coil frost, extreme high and low pressures, rapid on-
off cycling of the compressors, loss of refrigerant and more.
The following applies to all protection functions except
where otherwise indicated:
Unit operating capacity may automatically be reduced
before a protection function is activated. Such a reduction
may be sufcient to prevent an actual trip from occurring.
When a compressor is stopped by a protection function it is
held off for a period of 3 minutes, after which it is allowed to
restart (provided the cause of the trip has cleared).
When a protection function is active and when a unit is
locked out the alarm relay output “FLT” is active.
More detailed information about protection functions and
troubleshooting refer to document “UC8 troubleshooting
information”, available for free download from the
temperzone internet website.
1 High pressure protection (HP)
OPA Econex units are tted with high pressure transducers
connected to UC8 input HPT. A compressor is switched
off when the discharge line pressure reading exceeds
4151 kPa.
The display shows the letters ‘HP’ when protection is
active.
2 Low pressure protection (LP)
OPA Econex units are tted with low pressure transducers
connected to UC8 input LPT. A compressor is switched off
when the suction line pressure reading falls below 228 kPa.
The display shows the letters ‘LP’ when
protection is active.
3 Indoor coil frost protection
When the unit is cooling the evaporating temperature in the
indoor coil should remain above -8°C. If this temperature
falls below -8°C then ice (frost) likely will form on the
indoor coil. If the low temperature persists for longer than 6
minutes then the protection function activates.
When indoor coil frost protection is
activated the compressor is stopped for 6
minutes, after which it is allowed to restart.
4 High discharge line temperature protection
The controller monitors the compressor discharge line
temperature via a sensor connected to input ‘DL’ (red wires).
The compressor is stopped when:
• The temperature rises above 115°C for longer than 15
minutes.
• The temperature rises above 125°C for longer than 2
minutes.
The display shows the message ‘Hi-t’ when
protection is active.
5 High discharge superheat protection
Discharge superheat is dened as the difference between
the compressor discharge gas temperature and the
condensing temperature. When this temperature differential
becomes very high it is an indication that the compressor
is being starved of refrigerant gas. Common reasons for
this could be a lack of refrigerant (under-charged or loss-
of-charge) or a problem with the expansion device (for
example a stuck accurator or loose wiring to an EEV).
The protection is activated when discharge superheat
exceeds 45K for longer than 30 minutes.
The display shows the message ‘Hi-dSH’
when protection is active.
6 Low discharge superheat protection
Discharge superheat is dened as the difference between
the compressor discharge gas temperature and the
condensing temperature. When this temperature differential
stays very low it can be an indication that the compressor
is being ooded with liquid refrigerant. Common reasons
for this could be an excess of refrigerant (over-charged) or
a problem with the expansion device (for example a stuck
accurator or loose wiring to an EEV).
The protection is activated when discharge superheat
remains below the threshold for longer than 15 minutes.
The threshold varies linearly from 0K at standard mode
minimum capacity (40%) to 10K at nominal capacity (100%).
This protection function is disabled when a compressor
operates at less than standard mode minimum capacity (<
40%).
The threshold for a variable speed compressor operated in
boost mode (capacity above 100%) is xed at 10K.
The display shows the message
‘LO-dSH’ when protection is active.
7 High evaporation temperature / high suction line
temperature protection
When the unit has a low pressure transducer connected to
the compressor suction line then the controller calculates
the evaporating temperature from the suction line pressure
reading. If the unit does not have a low pressure transducer
then the controller nds the evaporating temperature
via a coil temperature sensor (input IC when the unit is
cooling, input OC when the unit is heating, blue wires).
Additionally the controller monitors the compressor suction
line temperature via a sensor connected to input ‘SL’ (white
wires).
The protection function stops the compressor when:
• The evaporating temperature remains above 27.5°C for
longer than 15 minutes.
• The suction line temperature remains above 30°C for
longer than 15 minutes.
The display shows the message ‘Hi-SL’
when protection is active.
8 Other alarms
The controller performs many other protection functions.
For example:
• Signals from sensors and transducers must remain inside
normal operating range.
• Modbus RTU communications with connected devices
(e.g. TZT-100 or SAT-3 thermostat, a Carel Power+
inverter) must continue uninterrupted.
• Modbus RTU communications with a controller such
as a BMS that is controlling the unit must continue
uninterrupted.
Refer to document ‘UC8 Troubleshooting Guide’ for details.

- 10 -
9 Lock-out
Each protection function has a trip counter. A trip counter
is reset to 0 whenever the compressor run request is
removed. Any trip that has occurred more than 12 hours
ago is removed from the trip count. For some protection
functions, when the trip counter reaches value 3 (i.e. three
consecutive trips occur) then the unit is “locked out”.
When a unit is locked out the compressor is not allowed to
start. Lock-out is designed to protect the compressor from
repeatedly starting when a serious fault exists that requires
the attention of a service technician.
The display shows the code of the fault that caused the
lock-out condition.
A unit that is locked out can be unlocked using any one of
the following methods:
• Remove mains power from the unit for at least 3 seconds,
then restore power.
• Issue an ‘unlock’ command via Modbus RTU serial
communications.
• Reset the controller via Modbus RTU serial
communications.
temperzone.biz

- 11 -
APPENDIX II
AIR HANDLING PERFORMANCE
Note: Airows are for a dry coil. Reduce airow by 10% in wet coil conditions. In a free blow or low resistance application, beware
of exceeding indoor fan motor’s full load amp limit (refer Specications document).
As lters are optional, the fan air ows given are for units installed without lters.
OPA 560RLTFP
OPA 250RLTFP
l/s - Pa
OPA 350RLTFP
l/s - Pa
l/s - Pa
OPA 450RLTFP
500 1000 1500 2000 2500
0
100
200
300
AIR FLOW (l/s)
AVAILABLE EXTERNAL PRESSURE (Pa)
2.5 m/s Face Velocity
400
500
0NOMINAL
9V
8V
7V
5V
6V
9V
8V
7V
6V
5V
3.1
2.2
1.5
4.9
2.51.7 3.4
1.1
INPUT (kW)
2.5
1.5
0.5
2.0
1.0
3.0
3.5
Amps
500 1000 1500 2000 2500
0
100
200
300
AIR FLOW (l/s)
AVAILABLE EXTERNAL PRESSURE (Pa)
2.5 m/s Face Velocity
400
500
0NOMINAL
INPUT (kW)
3.0
2.0
1.0
2.5
1.5
3.5
4.0
8V
7V
5V
6V
9V
8V
7V
6V
5V
2.9
2.0
1.5
1.0
4.7
2.4 3.4
4.3
1000 1500 2000 2500 3000
0
100
200
300
AIR FLOW (l/s)
AVAILABLE EXTERNAL PRESSURE (Pa)
2.5 m/s Face Velocity
400
500
500 NOMINAL
9V
8V
7V
5V 6V
10V
8V
7V
6V
9V
10V
5V
4.5
3.9
2.8
2.0
5.4
3.3
1.0
2.3
1.7
4.6
1.4
INPUT (kW)
3.0
1.0
2.0
0.0
4.0
5.0 l/s - Pa - - - - l/s - W
- - - - l/s - W
- - - - l/s - W
- - - - l/s - W
2000 2500 3000 3500 4000
0
100
200
300
AIR FLOW (l/s)
AVAILABLE EXTERNAL PRESSURE (Pa)
2.5 m/s Face Velocity
400
500
15001000 NOMINAL
9V
8V
7V
5V
6V
10V
10V
9V
8V
7V
6V
5V
6.1
5.1
3.5
2.5
6.7
4.0
1.2
1.9
1.3
5.6
1.8
INPUT (kW)
3.0
1.0
2.0
0.0
4.0
5.0
2.8

© temperzone limited 2023
INSTALLER TO COMPLETE
COMMISSIONING CHECK LIST
Site Name/address: ..........................................................................................................................................................................
Installing Company ...................................................................................................... Date: ..........................................................
Serviceman: ............................................................................................................... Tel: ............................................................
Model ..................................................................... Serial No..................................... Site Ref. ....................................................
Unit mounted level? Y / N Supply voltage checked? Y / N
Temperzone recommended drain trap tted? Y / N External electrical isolator tted? Y / N
Water drains tested okay? (panels on, fan running) Y / N Indoor Plug fan set voltage V
Does unit have adequate safe access? Y / N Are temperature controller’s parameters set? Y / N
All electrical terminals are tight? Y / N Checked for excessive noise & vibration of unit? Y / N
Return air lters tted? Y / N Has client had controls demo? Y / N
Removed compressor shipping blocks? Y / N Electrical Certicate Of Compliance issued? Y / N
Refrigeration leak checked? Y / N Fresh air damper setting (if applicable) %
Is air ow set and balanced? Y / N
Thermostat type: BMS / SAT-3 / TZT-100 / Other? (name):
Mark UC8 dip switch positions with an 'X'
SW1 SW2
1234567 8 9 (1) 10 (2) 11 (3) 12 (4) 13 (5) 14 (6) 15 (7) 16 (8)
On On
Off Off
Record the following UC8 monitored conditions using push button SW3 (repeat to scroll through list).
IMPORTANT: Digital compressors must be operating at 100% for at least 10 minutes when taking these readings.
System 1
Cool Cycle: Low Pressure: SLP kPa Outdoor Ambient temperature: °C
Evap temperature: Et °C Indoor Return air temperature: °C
Suction Line temperature: SLt °C Indoor Supply air temperature: °C
Suction Superheat: SSH K Indoor fan amps : A
Discharge Line Pressure: dLP kPa Fresh Air introduced : %
Condensing temperature: Ct °C Compressor 1 amps : A
Discharge Line temperature: dLt °C Compressor 2 amps : A
Discharge Superheat: dSH K
De-ice Sensor temperature: ICEt °C
Required Capacity: CAP %
Expansion Valve 1: EE1 %
Expansion Valve 2: EE2 %
Heat Cycle: Low Pressure: SLP kPa Outdoor Ambient temperature: °C
Evaporating temperature: Et °C Indoor Return air temperature: °C
Suction Line temperature: SLt °C Indoor Supply air temperature: °C
Suction Superheat: SSH K Indoor fan amps : A
Discharge Line Pressure: dLP kPa Fresh Air introduced : %
Condensing temperature: Ct °C Compressor 1 amps : A
Discharge Line temperature: dLt °C Compressor 2 amps : A
Discharge Superheat: dSH K
De-ice Sensor temperature: ICEt °C
Required Capacity: CAP %
Expansion Valve 1: EE1 %
Expansion Valve 2: EE2 %
NOTE: This document to be kept with the unit. Failure to provide this completed page on request by Temperzone may affect unit
warranty.