SABROE SAB 193 S, Инструкция по эксплуатации, Страница: 55 / 177

Engineering manual - SAB 193-233-283 S A-frame (including ATEX)
008831 en 2022.02
55/175
Technical description
4.21 Selecting lubricating oil for Sabroe screw compressors
To ensure the compressor unit a long service life with safe and reliable operation, it is important
to use an oil type recommended by Johnson Controls Denmark. Please refer to
Sabroe oil rec-
ommendation where various oil types are listed in a table including oil brand, oil code and part
numbers.
Warning!
Only use oil recommended by Johnson Controls Denmark when first charging the plant and
when recharging. Mixing different oil types can cause irreversible damage.
4.22 Oil charge
See subsection 11.13 Oil charge .
4.23 Heating rod element for oil heating, pos. 30
In order to keep the lubricating oil in the compressor warm during a standstill period, the oil re-
ceiver has one or two built-in heating rods. Before start-up, the heating rods must have been
activated for six to eight hours to ensure that there is only a minimum of refrigerant in the oil.
When containing a lot of refrigerant, the oil will lose its lubricating property and tend to foam,
which can cause shutdown by the level switch.
As illustrated in Fig. 30, the direct heating rod consists of an electric heating element incorpo-
rated in a pipe with a diameter of 30 mm. The entire heating cartridge is screwed on tightly at
the G 1 1/4" thread. It is available in ATEX execution.
Note: The heating rod must not be energised if the oil level in the receiver is below the mini-
mum mark in the sight glass, and it should generally be switched off during compressor
operation.
Fig. 30: Heating rod, type A
Heating rods
Used for: Power
Watt
Voltage
V
L1
mm
L2
mm
460
460
460 250
230
115
158 175 SAB 120/151/193/233/283/355
80 L2
L1
NV50
G 1 ¼
30
50
Marking: Prod. no.
Watt
Volt
Manu. date
ø 30