ST
ART
-UP
PROCEDURE
UNIT PROTECTION
WIRING
- 3 -
installation details; model search 'SAT-3'.
A separate instruction booklet comes with the
SAT-3 for installation and operation.
Remote temperature sensors are available
separately and can be installed to enhance the
systems functionality.
Note: Ensure the remote sensor wires are run
separately and away from main power supply wires,
including the interconnecting cable.
c. BMS Control via dry contact and analog inputs:
the unit controller (UC8) offers facilities to connect a
BMS system via a set of of no-voltage contacts and
0-10V dc analog signals.
d. BMS control via Modbus over RS485. For a full list
of the Modbus control setup, settings and read/write
parameters. Contact Temperzone for details, or visit
www.temperzone.biz; model search 'BMS'.
5 UNIT PROTECTION
5.1 General
Unit protection is incorporated in the UC8 Controller
board. A high pressure lockout protects the unit in the
event of either water flow failure in cooling mode, fan
failure in heating mode, or a loss of refrigerant. Units
include an anti rapid cycle timer for compressor on/off
protection.
On CWP
S
R units the unit's controller (UC8) protects
against freezing of the water within the unit on heating
mode. There are relay boards supplied for both common
fault output and run status indication (refer 7.5).
Refer to UC8 Controller label on the unit for operation &
fault diagnostics information, or visit www.temperzone.biz.
Note: Lockout protection can be reset by switching
the unit's power supply off and on. Lockout protection
can also be reset by Modbus connection. For detailed
information about control via Modbus RTU refer to
document UC8 Modbus communications available at
www.temperzone.biz; model search 'UC8'.
5.2 Electric Heating
Electric element/s are totally enclosed within the unit
and are supplied with auto (90°C) and manual (120°C)
high temp. safety thermostats required to meet AS/
NZS 60335.2.40 2006. A fan run-on timer for rapid heat
dissipation is incorporated into the UC8 as well as a 70°
fast acting temperature sensor to ensure overall safety.
5.3 UC8 Controller Options
For more information on the functions, operation and
options provided by the UC8 Controller (eg thermostat
options, remote on/off, BACnet
BMS control via
modbus over RS485, DRED, data logging), refer
www.temperzone.biz; model search 'UC8'.
6. START-UP PROCEDURE
6.1 Power
a. Check the unit is electrically connected in accordance
with the wiring diagrams.
b. Check all wiring connection and terminal tightness.
c. Switch ON the Main distribution board circuit breaker
and the local isolator.
d. Ensure the thermostat is OFF.
e. Check the supply voltage.
6.2 Fan
Various options are available if either High speed or Low
speed need adjusting:
a. The UC8 in the unit can be used to adjust the fan
speed (applies only when the TZT-100 is used, or
other compatible alternative):-
i. Ensure the compressor is off and the thermostat or
BMS does not request for the compressor to start.
ii. Press and hold down the SW3 push button on the
UC8 circuit board until the display shows the letter
'H', then release the push button.
iii. The fan will start and run at the 'High' speed setting
(factory default setting is 5.0V). The display will
show the value ('5.0') and the indoor fan will run at
the selected speed.
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 for
'High' fan speed (3.0V).
v. When the desired setting for high fan speed is
selected then wait for 30 seconds. The controller
will save the selected value in its memory and
return to normal operation.
vi. To adjust the fan 'Low' speed repeat the above
procedure but wait until the display shows the letter
'L' before releasing the push button. The factory
default value for low speed is 3.0V.
c. Check if the High speed airflow fits the requirements
of the installation. Beware, in tropical (high humidity)
conditions care must be taken to select an air flow
which does not create water carry-over problems.
d. Check if the Low speed satisfies the application in
respect to noise yet without risk of frost on the coil.
6.3 Water
a. Check water connections to the unit have been made,
valves are open and there are no leaks.
b. Set the water flow rate as per the Specification Sheet.
6.4 Starting the Compressor
a. On the unit's UC8 controller, press and hold the SW3
push button until the display shows a letter 'c' for
Commissioning, then release. This reduces the waiting
times at start-up and between cycles.
b. Refrigerant pressures can be viewed on the UC8
display, making it unnecessary to connect gauges.
Refer Table 1, p.8.
