18 |
P a g e
Power Supply
1.
If the supply voltage is too low or too high, it can cause damage and/or result in unstable
operation of the heat pump unit, due to high in rush currents on start up.
2.
The minimum starting voltage should be above 90% of rated voltage. The acceptable
operating voltage range should be within ±10% of the rated voltage. When heat pump units
are installed in parallel, ensure that the voltage difference, between these units, is within
±2% of each other. The voltage difference between phases of a three-phase power supply
should be within ±2%.
3.
Ensure the cable specifications meet the correct requirements for the specific installation.
The distance between the installation site and the mains power supply will affect the cable
thickness. Follow the 17
th
edition wiring regulations to select the cables, circuit breakers and
circuit breakers.
Earthing and Over Current Protection
In order to prevent electrical shock in case of leakage from unit, install the heat pump according to
current electrical wiring regulations.
1.
Do not frequently interrupt the voltage supply to the heat pump as this may result in a
shorter life expectance of the heat pump.
2.
When installing over current protection, ensure that the correct current rating is met for this
specific installation.
3.
The compressor, fan coil unit and heat pump water pump all have AC- contactors and
thermo relay protection. Therefore, in the process of installation and debugging, firstly
measure each of the
components’
current, and then adjust the current protection range of
the thermo relays.
Summary of Contents for CE-H17
Page 12: ...12 P a g e Suggested Installation Method 1 Heating with Hot Water Priority Buffer ...
Page 13: ...13 P a g e Suggested Installation Method 2 Hot Water Buffer Thermal Store Only ...
Page 14: ...14 P a g e Suggested Installation Method 3 Heating Only with Buffer ...
