Kitano KC-Roka II-48M [52/64] Duct type air conditioners series roka ii

Duct type air conditioners

series: Roka II

7.3.5. Insulation work

Insulation material should adopt the material which is able to endure the pipe’s temperature

(no less than 120 °С).

See the table 7.3.5. for insulation material thickness.

Table 7.3.5.

Pipe diameter, mm Insulation thickness, mm

Refrigerant pipe

∅6.4–∅25.4

∅28.6–∅38.1

Drainage pipe

Inner diameter ∅20–∅32

Work procedure:

1) Before laying the pipes, the non-jointing parts and non-connection parts should be heat

insulated.

2) For construction convenience, before laying pipes, use insulation material to insulate the

pipes to be deal with, at the same time, at two ends of the pipe, remain some length not to be

insulated, in order to be welded and check the leakage after laying the pipes.

3) When the gas proof test is eligible, the jointing area, expanding area and the  ange area

should be heat insulated.

4) Make sure there s no clearance in the joining part of the accessorial insulation material and

local preparative insulation material.

7.3.6. Water drainage

Keep the drainpipe sloping downwards at a gradient of at least 1/100. Keep the drainpipe as

short as possible and eliminate the air bubble.

The horizontal drain pipe should be short. When the pipe is too long, a prop stand must be

installed to keep the gradient of 1/100 and prevent bending.

Build-in drain pump with head increases lift of 700mm.

Material Diameter, mm Distance between prop stands, m

PVC 25–40 1,5–2

The diameter of drainpipe should meet the drainage requirement at least. The dimension of

drainpipe can t less than the connecting dimension of indoor drainpipe.

The drainpipe should be heat-insulated to prevent condensation.

If the pressure at the connection of the drainpipe is negative, it needs to design drainpipe trap

(Fig. 7.3.6.(a)). Every indoor unit needs one drainpipe trap. A plug should be designed to do

cleaning.