Piping Diagram - Gree GUHD18ND3FO Service Manual

Notes:
RLA: Rated load amperes (marked in the nameplate of the outdoor unit)
FLA: Full load current
① The fuse is located on the main board.
② Install the disconnect device with a contact gap of at least 3mm (1/8inch) in all poles nearby
the units (Both indoor unit and outdoor unit).The appliance must be positioned so that the
plug is accessible.
③ Take 2 pieces of power cord of 0.75mm
indoor and outdoor unit, with their longest lengths of 50m (164feet). Please select the
appropriate line length as per the actual installation conditions. The communication lines can
not be twisted together. For the unit (≤30k), it's recommended to use 8m (26-1/4feet) long
communication line.
④ Take 2 pieces of power cord of 0.75mm
wired controller and the indoor unit, with their longest lengths of 30m (98-2/5feet). Please
select the appropriate line length as per the actual installation conditions. The
communication lines can not be twisted together. It's recommended to use 8m (26-1/4feet)
long communication line.
⑤ The wire size of the communication line should be no less than 0.75mm
recommended to take 0.75mm

4 PIPING DIAGRAM

TH-OE
Condenser
TH-D
4-Way Valve
Muffler
TH-OE: Outdoor Environment Thermal Bulb
TH-C: Outdoor Condenser Thermal Bulb
TH-D: Compressor Discharge Thermal Bulb
Notes: It is just a schematic diagram and some parts may differ from the real objects inside the unit.
2
(AWG18) power cords as the communication line.
Outdoor Unit
Filter
Filter
Electronic Expansion Valve
Filter
High Pressure
Switch
Accumulator
Compressor
Low Pressure Switch
TH-C
U-Match Series DC Inverter Service Manual
2
(AWG18) as the communication lines between
2
(AWG18) as the communication lines between the
Liquid Solid Valve
with Service Port
Gas Stop Valve
with Service Port
Cooling
Heating
12
2
(AWG18). It's
Indoor Unit
Liquid Solid
Valve
TH-IE
Gas Stop
Valve
TH-IE: Indoor Environment Thermal Bulb
TH-E: Indoor Evaporator Thermal Bulb
Evaporator
TH-E