RRHQ006~008ADV3(8)
Outdoor unit for air to water heat pump
4PW50201-1
Installation manual
4
I
NSTALLATION
PROCEDURE
Mounting the outdoor unit
When installing the outdoor unit, please refer to "Installation
guidelines" on page 2 to select an appropriate location.
1
Check the strength and level of the installation ground so that
the unit will not cause any operating vibration or noise after
installation.
2
Prepare 4 sets of M8 or M10 foundation bolts, nuts and washers
each (field supply).
3
Fix the unit securely by means of the foundation bolts in
accordance with the foundation drawing.
It is best to screw in the foundation bolts until their length
remains 20 mm above the foundation surface.
Drain work
Check in the combination table under "Possible options" on page 2
whether drain work is allowed. In case drain work on your unit is
allowed and the installation site requires drain work, then follow the
guidelines below.
■
Drain kits for drainage are available as option.
■
If the drain ports are covered by a mounting base or floor
surface, place additional bases of at least 30 mm high under the
outdoor unit's feet.
■
In cold areas, do not use a drain hose with the outdoor unit.
Drain water may freeze, impairing the heating performance. In
case use of a drain hose is unavoidable for one reason or
another, it is recommended to install the optional bottom plate
heater tape (EKBPHT).
Make sure the drain works properly.
Flaring the pipe end
To flare each pipe end, follow the procedure below:
1
Cut the pipe end with a pipe cutter.
2
Remove burrs with the cut surface facing downward so that the
chips do not enter the pipe.
3
Remove the flare nut from the stop valve and put the flare nut on
the pipe.
4
Flare the pipe. Set exactly at the position shown below.
5
Check that the flaring is properly made.
Connecting the refrigerant piping to the outdoor unit
1
When connecting the flare nut, coat the flare inner surface with
ether oil or with ester oil and initially tighten 3 or 4 turns by hand
before tightening firmly.
2
When loosening a flare nut, always use two wrenches together.
When connecting the piping, always use a spanner and torque
wrench together to tighten the flare nut to prevent nut cracking
and leaks.
1
Drain water holes
2
Bottom frame
3
Drain socket (optional)
4
Hose (field supply, inner diameter 16 mm)
1
Cut exactly at right angles.
2
Remove burrs
20
2
1
3
4
1
1
2
Flare tool for R410A
(clutch type)
Conventional flare tool
Clutch type
(Ridgid-type)
Wing nut type
(Imperial-type)
A
0~0.5 mm
1.0~1.5 mm
1.5~2.0 mm
All field piping must be installed by a licensed refrigeration
technician and must comply with relevant local and
national regulations.
CAUTION
■
Do not use mineral oil on flared part.
Mineral oil getting into the system would reduce the
lifetime of the units.
■
Never use piping which has been used for previous
installations. Only use parts which are delivered with
the unit.
■
Do never install a drier to this R410A unit in order to
guarantee its lifetime. The drying material may
dissolve and damage the system.
■
Incomplete flaring may cause refrigerant gas leakage.
Flare nut
Flare nut tightening torque
Ø6.4 mm (1/4")
15~17 N•m
Ø15.9 mm (5/8")
63~75 N•m
Valve cap tightening torque
Valve cap
Gas pipe
Ø6.4 mm (1/4")
21.6~27.4 N•m
Ø15.9 mm (5/8")
44.1~53.9 N•m
Service port cap tightening torque
10.8~14.7 N•m
A
1
2
3
1
Flare's inner surface must be flaw-free.
2
The pipe end must be evenly flared in a
perfect circle.
3
Make sure that the flare nut is fitted.
1
2
3
4
1
Torque wrench
2
Spanner
3
Piping union
4
Flare nut
4PW50201-1_off,-2N dig Page 4 Wednesday, October 22, 2008 10:39 AM
