Kaisai KHP-2.4/D270 Installation And Service Manual - page 76
76
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2. When installing the unit without air duct, please install the equipped thermal insulating foam at
the air outlet to prevent condensate water at air outlet. See below fig.
4. ELECTRIC INSTALLATION
4.1 Precautions on Safety
1. This air source water heater is class I appliance. Ensure that wire layout is performed by profes
-
sional personnel according to national wiring rules.
2. Ensure that a switch for all-pole disconnection is available for the fixed lines and is directly
connected to wiring terminals of the power supply. Ensure that contactor opening distance on all
poles meets the disconnection requirements under overvoltage category III conditions.
3. Ensure that reliable earthing are taken. A dedicated grounding apparatus should be used.
4. Use the power supply with specifications provided in the nameplate, and use circuits dedicated
for air conditioners.
5. Copper-conductor cables must be adopted for power cables, and the operating temperature
should not greater than the stipulated value. The diameter of the cables should be large enough.
For details, refer to Table 9-1. If the length of the power cable is greater than 15 meters, choose
a power cable with a larger cross-sectional area to prevent problems caused overloading. Do not
pull the power cable during the installation.