Johnson ICEBERG Serie Manuel D'instructions page 87

9.5 Water piping insulation
The complete water circuit including all piping, water piping must be insulated to prevent condensation during
cooling operation and reduction of the heating and cooling capacity as well as prevention of freezing of the outside
water piping during winter. The insulation material should at least of B1 fire resistance rating and complies with
all applicable legislation. The thickness of the sealing materials must be at least 13 mm with thermal conductivity
0.039 W/mK in order to prevent freezing on the outside water piping.
If the outdoor ambient temperature is higher than 30°C and the humidity is higher than RH 80%, then the
thickness of the sealing materials should be at least 20 mm in order to avoid condensation on the surface of the
seal.
9.6 Field wiring
A main switch or other means of disconnection, having a contact separation in all poles, must be
incorporated in the fixed wiring in accordance with relevant local laws and regulations. Switch off the
power supply before making any connections. Use only copper wires. Never squeeze bundled cables and
make sure they do not come in contact with the piping and sharp edges. Make sure no external pressure is
applied to the terminal connections. All field wiring and components must be installed by a licensed
electrician and must comply with relevant local laws and regulations.
The field wiring must be carried out in accordance with the wiring diagram supplied with the unit and the
instructions given below.
Be sure to use a dedicated power supply. Never use a power supply shared by another appliance.
Be sure to establish a ground. Do not ground the unit to a utility pipe, surge protector, or telephone ground.
Incomplete grounding may cause electrical shock.
Be sure to install a ground fault circuit interrupter (30 mA). Failure to do so may cause electrical shock.
Be sure to install the required fuses or circuit breakers.
9.6.1 Precautions on electrical wiring work
Fix cables so that cables do not make contact with the pipes (especially on the high pressure side).
Secure the electrical wiring with cable ties as shown in figure so that it does not come in contact with the
piping, particularly on the high-pressure side.
Make sure no external pressure is applied to the terminal connectors.
When installing the ground fault circuit interrupter make sure that it is compatible with the inverter (resistant to
high frequency electrical noise) to avoid unnecessary opening of the ground fault circuit interrupter.
The ground fault circuit interrupter must be a high- speed type breaker of 30 mA (<0.1 s).
This unit is equipped with an inverter. Installing a phase advancing capacitor not only will reduce the power
factor improvement effect, but also may cause abnormal heating of the capacitor due to high-frequency
waves. Never install a phase advancing capacitor as it could lead to an accident.
9.6.2 Wiring overview
The illustration below gives an overview of the required field wiring between several parts of the installation.
WARNING
NOTE
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