Rittal 3214.700, Руководство по сборке и эксплуатации, Страница: 5 / 20

Rittal HD air/water heat exchangers 5
4 Device description
EN
4.2.1 How it works
The air/water heat exchanger comprises three main
components (see fig. 2):
– Heat exchanger package (item 2),
– fan (item 3) and
– magnetic valve (item 1),
which are connected together by pipes.
Fig. 2: Functional principal of the air/water heat exchanger
Key
1 Magnetic valve
2 Heat exchanger
3 Fan
4 Temperature control
5 Cooling water return
6 Cooling water inlet
The heat loss of the enclosure is dissipated in a mem-
brane heat exchanger to the water coolant. A fan
(item 3) blows the internal enclosure air over the heat ex-
changer (item 2); except for the inlet and outlet water
and the condensed water discharge, the unit is closed
to the environment.
The magnetic valve (item 1) controls the cooling output
by changing the water flow volume depending on the re-
quired setpoint temperature and the water inlet temper-
ature.
4.2.2 Condensation
Any condensation that forms on the heat exchanger
(with high humidity and low water temperatures) is rout-
ed to the bottom and out of the unit via a drain opening
in the heat exchanger tray. For this purpose, a hose
must be connected to the condensate nozzle (see sec-
tion 5.3.4 "Connecting the condensate water dis-
charge"). The condensate must be able to run off freely.
The hose used for draining off condensate must be laid
free from kinks and checked for correct drainage. Con-
densate hoses are available as accessories (refer also to
Accessories in the Rittal Catalogue).
4.3 Proper use, foreseeable misuse
The air/water heat exchanger is designed for the cooling
of enclosures in the food industry (food areas as defined
by DIN EN 1672-2). Under no circumstances should the
limit values specified in the technical specifications (see
section 11 "Technical specifications") be exceeded. As-
sembly, installation and servicing may only be performed
by properly trained specialists.
Improper use may cause hazards. Improper use may be
for example:
– Use of the air/water heat exchanger for a long period
with an open enclosure
– Use of accessories not approved by Rittal GmbH &
Co. KG
– Use of an incorrect cooling medium
– Use in conjunction with an enclosure for the cooling of
foodstuffs in a food industry environment
– Outdoor siting
– Use in the private sector, such as household or do-
mestic use
– Use as an evaporator in conjunction with refrigerants
4.4 Scope of supply
1 2
1 3
1 4
1 6 1 5
1 1
Note:
With product no. 3215.700, condensate
forming at the cold air outlet may be carried
into the enclosure in case of high air humidi-
ties. To prevent this, the enclosure must be
sealed on all sides (IP 54). If the enclosure is
open or not fully sealed, the limit values given
in tab. 1 must be observed.
Water inlet temperature
Tw [°C]
Relative humidity rF [%]
= 10 ≤ 55
≥ 16 = 80
Tab. 1: Limit values
Qty. Description
1 Air/water heat exchanger
1 Dispatch bag with
1 – HD sealing frame
6, 10 – Threaded bolts M6 x 30 (3214.700,
3215.700)
6, 10 – Hex nuts M6 (3214.700, 3215.700)
6, 10 – Washers (3214.700, 3215.700)
1 – Cable tie
Tab. 2: Scope of supply