4 Installation
Installation manual
6
RRLQ011~016CA
Outdoor unit for air to water heat pump
4P385895-1A – 2016.03
c
a
b
d
2
Choose a piping route (a, b, c or d).
a
b
c
d
3
If you have chosen the downwards piping route:
▪ Drill (a, 4×) and remove the knockout hole (b).
▪ Cut out the slits (c) with a metal saw.
c
c
b
a
4× Ø6 mm
4
Do the following:
▪ Connect the liquid pipe (a) to the liquid stop valve.
▪ Connect the gas pipe (b) to the gas stop valve.
a
b
5
Do the following:
▪ Insulate the liquid piping (a) and the gas piping (b).
▪ Make sure the piping and piping insulation do NOT touch the
compressor (c), the compressor terminal cover (d), and the
compressor bolts (e). If the liquid pipe insulation might touch
the compressor terminal cover, adjust the height of the
insulation (f=no insulation around the compressor terminal
cover (d)).
▪ Seal the insulation ends (sealant etc.) (g).
d
c
e
b
a
g
g
h
h
f
6
If the outdoor unit is installed above the indoor unit, cover the
stop valves (h, see above) with sealing material to prevent
condensed water on the stop valves from moving to the indoor
unit.
NOTICE
Any exposed piping might cause condensation.
7
Reattach the service cover and the piping intake plate.
8
Seal all gaps (example: a) to prevent snow and small animals
from entering the system.
a
WARNING
Provide adequate measures to prevent that the unit can be
used as a shelter by small animals. Small animals that
make contact with electrical parts can cause malfunctions,
smoke or fire.
NOTICE
Make sure to open the stop valves after installing the
refrigerant piping and performing vacuum drying. Running
the system with the stop valves closed may break the
compressor.
4.2.2
To determine if oil traps are required
If oil flows back into the outdoor unit's compressor, this might cause
liquid compression or deterioration of oil return. Oil traps in the rising
gas piping can prevent this.
If
Then
The indoor unit is installed
higher than the outdoor
unit
Install an oil trap every 10 m (height
difference).
a
b
10 m
a
Rising gas piping with oil trap
b
Liquid piping
The outdoor unit is
installed higher than the
indoor unit
Oil traps are NOT required.
4.3
Checking the refrigerant piping
4.3.1
To check for leaks
NOTICE
Do NOT exceed the unit's maximum working pressure (see
"PS High" on the unit name plate).
