Limits Of Use - York Roca DBO-627 BG Instrucciones De Instalación

more than 15 minutes. Should this not be
possible, a flow of dry nitrogen should be
established.
- POE oil cannot be mixed with mineral oil.
Amounts of over 5% of mineral oil mixed
with POE will cause transitory obstruc-
tions within the expansion systems.
- It is recommendable to use filter-dryers
on systems using POE oil.
- Should the POE oil become contaminated
with water, a vacuum pump is no longer
sufficient. Excessive presence of humidity
causes sludge and acids that damage the
compressor. Therefore, any contaminated
oil should be changed or recovered by
means of filters.
- Due to its high hygroscopic nature, POE
oil can cause burns on the skin. The use of
gloves during handling is recommended.
- The POE oils that are adequate for
R-410A systems are as follows:
MOBIL EAL ARCTIC 22 CC (ICI)
EMKARATE RL2CF (ICI)
Specific tools
For installing equipment charged with

Limits of use

Voltage limits
Nom. 20 V
Minimum Maximum
198 254
Notes: WB = Wet bulb. DB = Dry bulb.
(1) This equipment can operate, for a short interval of time, at a temperature beyond limits until the occupied space is conditioned.
8
R-410A refrigerant and POE oil, the follow-
ing tools are required:
- Pressure gauges. Specific for R-410A.
High pressure (red) with a range of -1 to
5 bar. Low pressure (blue) with a range
of -1 to 8 bar. With ½" threaded UNF-20
connections.
- Hoses. Of HNBR rubber and with nylon in-
ternal lining. Operating pressure 5.1 Mpa,
bursting pressure 27.4 Mpa. ½" UNF-20
thread.
- Vacuum pump. High vacuum (two stages)
and with adapter to avoid part of the min-
eral oil in the pump from flowing towards
the circuit charged with POE oil. With
adapter for ½" UNF-20 thread.
- Electronic scale. Needed because it is
impossible to charge R-410A by using a
charge cylinder due to the bubbles caused
by the high pressure and speed of gas
evaporation.
- Refrigerant tank. Adequate for a pressure
of 47 bar and for containing R-410A only
(painted pink). With adapter for ½" UNF-20
thread.
- Leak detector. Specific for HFC. Sensitivity
Air intake temperature to outdoor coil DB
Operating cycle
Minimum °C
Cool Heat
19 -10
(1)
Maximum °C
Cool Heat Cool WB
46 24
GB
of approximately 2 gr. year.
- Recovery equipment. Specific unit for
recovery of R-410A.
Minimum thickness of tubing
Due to the greater operating pressures of
R-410A refrigerant, the interconnection of
the split units requires seamless DHP cop-
per tubing with thicker walls.
Tubing diameter
mm (inches)
6.5 (1/4")
9.52 (/8")
12.70 (1/2")
Air intake temperature to indoor coil
Operating cycle
Minimum °C
Heat DB Cool WB
15 10 2
(1)
Minimum thickness
mm
0.76
0.812
0.812
Maximum °C
Heat DB
2
(1)