Schematic Diagram For Unit Connection; Connection Pipe Dimensions; Cautions For Pipe Connection - Haier H-MRV Series Service Manual

(1)Schematic diagram for unit connection

Flared pipe connection
Indoor unit
Indoor unit

(2) Connection pipe dimensions:

Pipe Value
6.35mm
Liquid
Gas 12.7mm
Apply and tighten the nut.

(3)Cautions for pipe connection

Pipes free from twists, deformation, water, dust.
Dedicated tools for each R407C and R22
should be used and stored separately.
Optimized radii of bends
Insulation to be applied on all gaseous pipes
Flared section free from cracks
(4) Pipe connection process
Apply refrigeration oil on the end of the pipe to be connected and on the flared section.
Align the pipes to be connected and tighten the nut. (See the figure)
Ensure that no foreign articles enter into the pipes.
Piping connection of the indoor unit
1. Arrangement of piping and drainage pipe
After opening inlet grill,you will see a control box.
Remove the cover before working.
Cut away, with a hammer or a saw, the lid for piping according to piping direction.
Indoor side
Wall hole
70mm
(Cross section of wall hole)
Torque
18 N . m
50 N . m
Insulation material
Copper tube
>a__WcU[S^ <[c >a`V[e[a`Wc
Outdoor side
Thickness
of wall
3-way Valve
Outdoor uint
2-way Valve
Spanner
Spanner
Threads on the pipes may be damaged
when tightening if the pipes are not
well aligned.
Drain hose
Connecting electric cable
for indoor and outdoor unit
-85-
Joint
Nut