Gree GRS-1.5/D150ANbA-K, Service Manual

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GREE AIR SOURCE HEAT PUMP WATER HEATER SERVICE MANUAL
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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 Figure
4 Pipe Insulation
4.1 Thermal Insulation Measures for Water Pipes
4.1.1 Thermal Insulation Materials
Use closed-cell foam thermal insulation materials with flame retardant grade of B1.
The heat conductivity is not greater than 0.035 w/(m· k) when the average temperature is 0°C.
4.1.2 Thickness of the Thermal Insulation Layer
Thickness of the thermal insulation layer for the water pipes must be greater than 10 mm.
Bond the thermal insulation material joints with special glue and then wrap them with electrical
adhesive tape. The width of the adhesive tape must be 5 cm or greater to ensure secure connection.
5 Electric Installation
5.1 Precautions on Safety
(1) This air source water heater is class
Ⅰ
appliance. Ensure that wire layout is performed by
professional 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 grounding measures 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