Piping Work; Condensate Removal - Gree GMV-ND09A/A-T(U) Owner's Manual

4.3 Piping Work

4.3.1 Specification of Connection Pipe
Model
GMV-ND09A/A-T(U)
GMV-ND12A/A-T(U)
GMV-ND18A/A-T(U)
GMV-ND24A/A-T(U)
GMV-ND30A/A-T(U)
GMV-ND36A/A-T(U)
GMV-ND42A/A-T(U)
GMV-ND48A/A-T(U)
GMV-ND54A/A-T(U)
4.3.2 Piping Preparation
All cut ends are to be round, burr free, and cleaned. Failure to follow this practice increases the
chances for refrigerant leakage.

4.4 Condensate Removal

(1) It is not allowed to connect the condensate drain pipe into waste pipe or other pipelines
which are likely to produce corrosive or peculiar smell to prevent the smell from entering
indoors or corrupt the unit.
(2) It is not allowed to connect the condensate drain pipe into rain pipe to prevent rain water
from pouring in and cause property loss or personal injury.
(3) Condensate drain pipe should be connected into special drain system for air conditioner.
(4) The drain pan has primary and secondary drain connection (Fig.4.4). Condensate removal
is performed by attaching a 3/4" PVC pipe to the evaporator coil pan and terminated in
accordance with local or state Plumbing/HVAC codes. The installation must include a "P"
style trap that is located closely to the evaporator coil. Do not over-tighten the drain
connection(s) in order to prevent possible damage to the evaporator drain pan. See Fig.4.4
for details of a typical condensate line "P" trap.
External Diameter (inch)
Gas Pipe
3/8
1/2
5/8
5/8
5/8
5/8
5/8
5/8
5/8
Fig.4.3
10
GMV DC Air Handler
Liquid Pipe
1/4
1/4
3/8
3/8
3/8
3/8
3/8
3/8
3/8