ERYQ005~007ACV3
Outdoor unit for air to water heat pump
3P194375-1A
(4PW33166-1B)
Installation manual
4
I
NSTALLATION
PROCEDURE
Mounting the outdoor unit
When installing the outdoor unit, please refer to
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
If drain work is necessary, follow the guidelines below.
■
Install the drain plug for drainage.
■
If the drain port is covered by a mounting base or floor surface,
place additional foot bases of at least 30 mm in height under the
outdoor unit's feet.
■
In cold areas, do not use a drain hose with the outdoor unit.
Otherwise, drain water may freeze, impairing the heating
performance. In case the use of a drain hose is unavoidable for
one reason or another, it is recommended to install a heater
tape in order to protect drain from freezing.
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
To prevent gas leakage, apply refrigeration machine oil on both
inner and outer surfaces of the flare (use refrigeration oil for
R410A).
2
Align the centres of both flares and tighten the flare nuts 3 or 4
turns by hand. Then tighten them fully with torque wrenches.
Use torque wrenches when tightening the flare nuts to prevent
damage to the flare nuts and to prevent escaping of gas.
1
Drain-water hole
2
Bottom frame
3
Drain plug
4
Hose (field supply, inner diameter 16 mm)
1
Cut exactly at right angles.
2
Remove burrs
20
2
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
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")
14.2~17.2 N•m
(144~175 kgf•cm)
Ø15.9 mm (5/8")
61.8~75.4 N•m
(630~769 kgf•cm)
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
