I A; Operating Limits; Fouling Factors; Checking And Starting Up The Unit - CLIMAVENETA MICS-C FF Serie Manual De Instalación-Operación-Servicio

OPERATING LIMITS

ETHYLENE GLYCOL SOLUTIONS
Water and ethylene glycol solutions used as a thermal
vector in the place of water reduce the performance of
the unit. Multiply the performance fi gures by the values
given in the following table.
Freezing point (°C)
0 -5
Percentage of ethylene glycol by weight
0 12%
cPf 1 0,985
cQ 1 1,02
cdp 1 1,07
cPf: cooling capacity correction factor
cQ: fl ow rate correction factor
cdp: pressure drop correction factor

CHECKING AND STARTING UP THE UNIT

PREPARING FOR FIRST START UP or restarting af-
ter shutting down for long periods.
The chiller must be started up for the fi rst time by the
Technical Service.
Before starting up the chillers, make sure that:
• All safety conditions have been respected
• The chiller is adequately fi xed to the surface it rests
on
• Functional distances have been respected (see fi g.
page 5);
• Hydraulic connections have been carried out as indi-
cated in the instruction manual
• The water circuit is fi lled and vented;
• The water circuit valves are open
• Electrical connections have been carried out cor-
rectly
• Voltage is within a tolerance of 10% of the rated vol-
tage for the unit
• The unit is correctly earthed
• All electrical and hydraulic connections are tight and
have been completed correctly.
English 06/09
12
-10 -15 -20
20% 28% 35% 40%
0,98 0,974 0,97 0,965
1,04 1,075 1,11 1,14
1,11 1,18 1,22 1,24

FOULING FACTORS

The performance data given refer to conditions with
clean evaporator plates (fouling factor=1). For different
fouling factors, multiply the fi gures in the performance
tables by the coeffi cient given in the following table.
Fouling factors
(m 2 ˚C/W)
-25
4,4 x 10
-5
0,86 x 10 -4
1,72 x10 -4
f1 capacity correction factor
fk1 compressor power input correction factor
fx1 total power input correction factor
The unit must be started up for the fi rst time with
standard settings. Set point values may be modi-
fi ed only after testing has been completed. Before
starting up, power the unit for at least two hours by
switching QF1 and QS1 to ON to allow the oil in
the compressor sump to heat up.
I
Evaporator
f1 fk1
- -
0,96 0,99
0,93 0,98
MICS-C / MICS-CN
A
fx1
-
0,99
0,98
A