Viessmann Vitobloc 200 EM-50/81 Operating Instructions Manual page 12

Preparations
2.1.2 Engine lubrication oil
Principles
The use of lubrication oil that the CHP module manu-
facturer specifies for the relevant type of gas is a
prerequisite for the safe and wear-resistant operation
of the engine. Especially in view of possible warranty
claims in a case of damage, we like to emphasize the
operator's duty of care.
The service life of the lubrication oil depends on the
operating conditions, especially
-
the gas quality,
-
the ambient conditions,
-
the operating mode of the CHP module and
-
the quality of the lubrication oil.
designation
viscosity
water content
glycol content
TBN (total base number)
TAN (total acid number)
SAN (strong acid number)
i ph (Initial ph value)
oxidation 5.8 µm
nitration 6.1 µm
wearing metals
aluminium
chromium
copper
iron
lead
tin
silicon
sodium
* CHP module with MAN engine
** potassium hydroxide
Table 4 Characteristic values of a lubrication oil analysis
12
The contaminants contained in special types of gas,
such as dumpsite gas and biogas, can considerably
reduce the service life of the lubrication oil.
It is necessary to establish the relevant changing
interval by analyzing the old oil, with the first of these
analyses being carried out during the first mainte-
nance, or in the case of special types of gas, after
approx. 400, 1,000 and 2,000 operating hours.
Please note that also the trends of several analyses
must be taken into consideration when assessing the
wear and tear, apart from complying with the limits as
such. The following characteristic values need to be
analyzed and recorded:
unit
mm²/sec (cSt)
%
ppm
% or mgKOH**/g
acc. to TBN
mgKOH**/g
A/cm
A/cm
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
Operating instructions for the natural gas-fuelled CHP module VITOBLOC 200
measuring method
DIN 51 366, ASTM D 445.
DIN EN ISO 3104, (DIN 51 562-1*)
DIN 51 366, ASTM D 1744.
(EN ISO 12937*)
DIN 51 375, ASTM D 4291
ISO 3771
ASTM 664
ASTM 664
on request
DIN 51 451
DIN 51 451
DIN 51 396-2
DIN 51 396-2
DIN 51 396-2
DIN 51 396-2
DIN 51 396-2
DIN 51 396-2
DIN 51 391, ASTM D 5185
DIN 51 396-2