Parker Hiross Hyperchill ICE001, Руководство пользователя

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Hyperchill (ICE001)
10
English
3.3.2 Water and ethylene glycol
If installed outdoors or in an unheated indoor area, it is possible that
the water in the circuit may freeze if the system is not in operation
during the coldest times of the year.
To avoid this hazard:
a) equip the chiller with suitable antifreeze protection devices,
available from the manufacturer as optional accessories;
b) drain the system via the drain valve if the chiller is to remain
idle for a prolonged period;
c) add an appropriate quantity of antifreeze to the water in cir-
culation (see table).
Sometimes the temperature of the outlet water is so low as to re-
quire the addition of ethylene glycol in the following percentages.
Outlet water
temperature [ ˚ C]
Ethylene glycol
(% vol.)
Ambient
temperature
4 5 ---2
2 10 ---5
0 15 ---7
--- 20 ---10
--- 25 ---12
--- 30 ---15
3.3.3 Expansion tank
To avoid the possibility of an increase or decrease in the volume
of the fluid due to a significant change in its temperature causing
damage to the machine or the water circuit, we recommend
installing an expansion tank of suitable capacity.
The expansion tank must be installed on intake to the pump on
the rear connection of the tank.
The minimum volume of an expansion tank to be installed on a
closed circuit can be calculated using the following formula:
V=2 x Vtot x (Pt min --- P t max)
where
Vtot= vol. circuit total (in litres)
P t min/max= specific weight at the minimum/maximum temper-
ature reached by the water [kg/dm
3
].
The specific weight values at different temperatures for glycol
percentage values are given in the table.
Temperature [ ˚ C]
glycol
%
---10 0 10 20 30 40 50
0% 1.0024 1.0008 0.9988 0.9964 0.9936 0.9905 0.9869
10% 1.0177 1.0155 1.0130 1.0101 1.0067 1.0030 0.9989
20% 1.0330 1.0303 1.0272 1.0237 1.0199 1.0156 1.0110
30% 1.0483 1.0450 1.0414 1.0374 1.0330 1.0282 1.0230
3.4 Electrical circuit
3.4.1 Checks and connections
!
Before carrying out any operation on the electrical system,
make sure that the appliance is disconnected from the electrical
power supply.
All electrical connections must comply with the applicable regu-
lations in force in the country of installation.
Initial checks
1) The power supply voltage and frequency must correspond to
the values stamped on the chiller nameplate. The power sup-
ply characteristics must not deviate, even for brief periods,
from the tolerance limits indicated on the electrical diagram
, which are +/--- 10% for the voltage; +/--- 1% for the fre-
quency.
2) The voltage must be supplied with phase and neutral conduc-
tors, and the latter must be connected to earth in its own cabin
(TN system, or behalf of the supply company, TT system).
The phase conductor and the neutral conductor are not inter-
changeable and must not be confused.
Connection
1) The electrical power supply must be connected to the chiller
using a 3---wire cable, comprising 2 phase conductors and an
earth conductor. For minimum cable section, see par. 7.2.
2) Ensure that supply cable has at its source protection against
direct contact of at least IP2X or IPXXB.
3) On the supply line to the chiller, install a residual---current
circuit breaker with a trip rating of 0.3A, with the current rat-
ing indicated in the reference electrical diagram, and with a
short circuit current rating appropriate to the short circuit
fault current existing in the machine installation area.
The nominal current In of the magnetic circuit breaker must
be equal to the FLA with an intervention curve type D.
4) Max. grid impedance value = 0.274 ohm.
Subsequent checks
Check that the machine and the auxiliary equipment are earthed
and protected against short circuit and/or overload.
!
Once the unit has been connected and the upstream main
switch closed (thereby connecting the power supply to the machi-
ne), the voltage in the electrical circuit will reach dangerous le-
vels. Maximum caution is required!!