SYSVRF2 CASSETTE MINI IM

10
8. CONNECT THE DRAINAGE PIPE
8.1 Installing The Drainage pipe Of The Indoor Unit
Check all the joints with the leak detector or soapy water. (Refer
to Fig.7-6)
7.2 Check The Leakage
B A
D
C
Check-point of indoor units
Check-point of the outdoor unit
A......Lo-stop valve B......Hi-stop valve
C, D. Joints of the connection pipe to the indoor unit.
Fig.7-6
Insulate all exposed parts of the flare pipe joints and refrigerant
pipe on the liquid side and gas side. Ensure that there is no gap
between them. (Refer to Fig.7-7)
Incomplete insulation may cause condensation.
7.3 Insulation
1) The drainage pipe can use PVC pipe. (External diameter 30-32 mm,
inner diameter 25 mm.)
2) Joint the drainage pipe connector to the end side of water pumping
pipe. Fix the drainage pipe to the insulation casing of the water outlet
pipe with the clasp from the water outlet pipe (attached).
CAUTION
Don’t force water-pumping pipe or you might crack it.
5) When connecting the drainage pipe, do not drag the pipe and
thus pull the main unit. To do so, arrange bearing points every 800
to 1000 mm to avoid bending the pipe (Refer to Fig.8-1 b).
6) When connecting a lengthened drainage pipe, apply protective
tube to wrap the indoor part to connect it tightly.
7) If the drainage pipe outlet is higher than the pumping connection
pipe of the main body, arrange the drainage pipe upwards vertically
using the connection assembly of the water outlet for vertical
bending. Set the height of the drainage pipe to the water pan
surface to no more than 600 mm to avoid excessive backflow and
overflow during shutdown. (Refer to Fig.8-2.)
8) Based on pipe bending requirements, use the connection
assembly for the water outlet in the terminal box for pipe layout.
3) The water-pumping pipe and drainage pipe from main body
must be wrapped evenly with an insulation sheath, and bound
by a tightening band for stopping air ingress and coagulation.
4) Prevent water backflow from getting inside the unit during
shutdown. Place the drainage pipe shall downwards and the
drain water to outdoors (the drainage side). The gradient of the
drainage pipe should be higher than (1/100) and free from
salient or water. (Refer to Fig.8-1 a)
CAUTION
The joints in the drainage system must be sealed to avoid water leaks.
9) The height from the floor to the end of drainage pipe or the
bottom of drainage slot must be more than 50 mm. Do not
immerse the end of drainage pipe or the bottom of drainage slot
into water. When draining condensed water to the raceway, bend
the drainage pipe into a U-shaped hydroseal to avoid transmitting
odor from the drainage pipe indoors.
Unit body
Subsidiary belt for the
thermal insulation pump
Field piping side
Cut top-down
Fig.7-7
a
b
Fig.8-1
b
Fig.8-2
800 ～1000mm
Gradient:
higher than
1/100
>1000mm
<200mm
Lean over
1/100
Pump-pipe clasp
(the fittings)
Max. 600mm
800 ～1000mm