TemperZone 6 Instruction Manual

Temperzone Unit Controller 6 - Operation and installation- Hydronic Issue 1
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UNIT CONTROLLER 6 (UC6)
Operation and Installation
Hydronic
Date: 12 October 2015
Issue: 1

Temperzone Unit Controller 6 - Operation and installation- Hydronic Issue 1
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Contents
1. Introduction ....................................................................................................................................... 4
2. Features ............................................................................................................................................. 4
3. Lower board connections .................................................................................................................. 5
3.1. Power supply terminals .............................................................................................................. 6
3.2. Output terminals ......................................................................................................................... 6
3.3. Input terminals ............................................................................................................................ 7
4. Upper board connections................................................................................................................... 9
4.1. Digital input signals .................................................................................................................... 9
4.2. Digital output signals ................................................................................................................ 10
4.3. Analogue output signals ........................................................................................................... 10
4.4. Communication ports ............................................................................................................... 11
4.4.1. Temperzone TZT-100 thermostat connection ...................................................................... 11
4.4.2. Power+ inverter driver connection ....................................................................................... 12
4.5. Electronic expansion valves ..................................................................................................... 13
5. Operation ......................................................................................................................................... 13
5.1. Remote on/off ........................................................................................................................... 13
5.2. Variable duty units ................................................................................................................... 13
5.3. Water flow valve Y2 ................................................................................................................ 13
5.4. Indoor fan control ..................................................................................................................... 14
5.5. Heating mode ........................................................................................................................... 14
5.6. Crankcase heater ....................................................................................................................... 14
5.7. Electronic expansion valve control .......................................................................................... 14
5.8. Demand response management ................................................................................................ 15
6. Protection functions ..................................................................................................................... 15
6.1. Minimum compressor run time ................................................................................................ 15
6.2. Minimum compressor off time ................................................................................................. 15
6.3. Minimum compressor cycle time ............................................................................................. 15
6.4. High pressure protection (HP) .................................................................................................. 15
6.5. Loss of refrigerant protection (LOR) ....................................................................................... 16
6.6. High suction line temperature (HiST) ...................................................................................... 16
6.7. Indoor coil frost protection (FROST) ....................................................................................... 16
6.8. High discharge line temperature protection (HDT).................................................................. 17
6.9. No Water Flow Protection ........................................................................................................ 17
6.10. Water Float Protection .......................................................................................................... 17
6.11. Low output water temperature protection ............................................................................. 18
6.12. Compressor lock-out ............................................................................................................. 18
6.13. Sensor alarm ......................................................................................................................... 18
6.14. Loss of RS485 communications alarm ................................................................................. 18

Temperzone Unit Controller 6 - Operation and installation- Hydronic Issue 1
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7. Test mode ........................................................................................................................................ 18
8. Commissioning mode ..................................................................................................................... 19
9. Display summary ............................................................................................................................ 20

Temperzone Unit Controller 6 - Operation and installation- Hydronic Issue 1
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1. Introduction
The temperzone Unit Controller 6 (UC6) is the successor to the OUC4 controller.
The UC6 provides increased capability and flexibility in indoor-, outdoor- and
packaged units. The complete controller combines the µPC controller board from
Carel plus an interface board to connect temperzone standard sensors and plugs.
The UC6 receives requests such as “Unit On/Off”, “Start compressors”, “Activate
HEAT (Reverse Cycle)” and transfers these requests to the outputs after enforcing
safety timers. The UC6 ensures unit safety by continuously monitoring input
signals such as pressures and temperatures. Beside the normal controls and unit
safety the UC6 has many other functions, for example head pressure control,
capacity control, superheat control, serial communications and more.
2. Features
The UC6 has the following features:
Normal controls:
- One controller can manage two complete refrigeration circuits
- Two drivers for uni-polar electronic expansion valves (EEV)
- Outdoor fan control
- Reversing valve change over management
- Variable speed compressor management
- Crankcase heater control
- BMS interface with optional board(BACnet/IP, Ethernet, MS/TP)
- DRED input and control
Safety functions:
- Compressor minimum cycle time, minimum run time, minimum off time.
- High pressure protection via high pressure transducer
- Low pressure protection via low pressure transducer
- Loss of refrigerant protection
- Indoor coil frost protection
- No water flow protection
- Water float protection
- Low water output temperature protection
- Repeat fault lock out
- Error code display
- Alarm logging
Commissioning functions:
- Commissioning mode
- Automatic test sequence

Temperzone Unit Controller 6 - Operation and installation- Hydronic Issue 1
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3. Lower board connections
The paragraphs on the following pages give details how the UC6 should be
connected both for packaged units and for the outdoor unit of a split system.
Care must be taken that the correct connections are made as the UC6 can be
configured in various modes.
Important:
 The UC6 controller must be mounted inside an electrical panel.
 To minimise electrical interference low power signal wires from temperature
sensors, pressure transducers and low voltage control signals must be kept
physically separate from wiring and cables that carry mains power.
Never run power cables and signal cables in the same conduits.
 Contact temperzone if the controller has malfunctioned. Do not attempt to
repair the controller.

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3.1. Power supply terminals
The UC6 is powered by 24V ±10% AC. A class 2 safety transformer with a
minimum rating of 24VA must be used in the installation. The power supply to the
UC6 controller must not be used to power other electrical devices. If the 24V
secondary winding of the transformer is earthed then make sure that the earthed
wire connects to terminal “µPC supply 0V”.
A yellow LED indicates when the UC6 is powered.
Terminal Signal Notes
HOT
(µPC supply)
24V AC HOT Do not inadvertently connect
230V AC to these pins!
0V
(µPC supply)
24V AC COMMON
Output supply Relay common power supply for
switched output signals:
CMC1 CMC2
RV1 RV2
CCH CCS
This terminal normally
connects to 230V AC phase.
Fan supply Power supply for fan control
terminals.
Depending on the
connections to the fan or fan
controller this terminal
normally connects to
24V AC HOT
or 230V AC phase
3.2. Output terminals
When the UC6 is configured as three speed indoor fan:
Terminal Signal Notes
Low1 Indoor fan(s) Low speed terminal
When active these outputs
electrically connect to the
Fan supply terminal.
Low2
Med1 Indoor fan(s) Medium speed terminal
Med2
Hi1 Indoor fan(s) High speed terminal
Hi2

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When the UC6 is configured indoor fan as EC motor:
Terminal Signal Notes
Low1 No function.
Low2
Med1 No function.
Med2
Hi1/Hi2 Active to turn on the EC fan contact
Terminal Signal Notes
CMC1 Compressor On/Off
When active these outputs
electrically connect to the
Output supply terminal.
CMC2 Circulation pump control
RV1 Reversing valve/Electric heater
circuit1(if fitted)
RV2 Condensate pump
CCH Crankcase Heater/Electric heater
circuit2(if fitted)
CCS Water Pump
3.3. Input terminals
Terminal Signal Notes
CS This input can have one of two
functions:
(1) 0 to 1V Analogue input
(2) Return or supply air
temperature
For variable capacity systems
For fixed capacity systems
ST1 Compressor suction line
temperature
NTC blue wires
ST2 NA
DT1 Compressor discharge line
temperature
NTC red wires
DT2 Electric heater temperature
sensor (if used)

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Terminal Signal Notes
SP1 Compressor suction line pressure 0-5V transducer
OR
SP2 NA
HP1 Compressor discharge line
pressure
HP2 NA
TS1 Water In temperature NTC Blue wires
TS2 Water Out temperature
OAT Outdoor air temperature NTC black wires

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4. Upper board connections
The digital input port common pins DIC1 and DIC2 are internally directly
connected to the local board 0V.
4.1. Digital input signals
When the UC6 is configured as three indoor fan speed:
DI Signal
1 Indoor fan LOW speed input
2 Indoor fan MEDIUM speed input
3 Indoor fan HIGH speed input
When the UC6 is configured as EC fan motor:
DI Signal
1 Active the indoor fan contact
2
3
DI Signal Notes
4 Reverse cycle request Heat
5 Compressor request
Or overload input
Without TZT-100: Compressor
With TZT-100: Overload input
6 Water Float Switch Input Normally close. If the float switch is
activated, there may be a water leak from
the pipe. It will stop the compressor
immediately.
7 Remote on/off This input must be closed circuit to allow
the UC6 to switch compressors and fans on.
9 Water verification Water Flow Verification Switch when there
are water flow through the pipe switch is
closed

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When the UC6 is configured for DRED function:
DI Signal Notes
8 DRED1 When activated the compressors will be OFF.
The indoor fan is allowed to continue.
9
DRED2 or DRED3
(configurable via UC6
service interface)
DRED2 active: Total unit energy
consumption will be reduced to less than
75% of rating.
DRED3 active: Total unit energy
consumption will be reduced to less than
50% of rating.
DI Signal Notes
10 Push button
Press and hold the push button on the lower
board 1 to 5 seconds to start test mode.
Test mode can only be activated when both
compressors are OFF.
Press and hold the push button on the lower
board 10 to 15 seconds to start
commissioning mode.
4.2. Digital output signals
DO Signal Notes
NO7 Normally open
Alarm output relay C3 Common
NC7 Normally closed
4.3. Analogue output signals
AOUT Signal Notes
Y1 Indoor fan speed 0-10V (if used)
Y2 Water flow Valve 0-10V control water flow
Y4 LED display control Controls the 1-digit LED display used to
show alarm codes.