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1 - PRECAUTIONS
1.1 - Operating limits
1.1.1 - Cooling mode
Minimum blowing temperature 12°C when the apparatus is
installed in an atmosphere of 27°C DB (dry bulb) and 65% RH
(relative humidity).
1.1.2 - Heating mode
The blowing temperature must not exceed 60°C. Carrier
recommends not to exceed a temperature of 35°C for blowing so
as to avoid any risk of layering, cause of discomfort.
1.1.3 - Operating environment
42GR ATM has been designed to operate in a non-corrosive,
"urban" internal atmosphere, free of dust, in a non-marine
environment. The levels of the chemical compounds below must
in no case be exceeded:
- SO
<
0,02 ppm
2
- H
S
<
0,02 ppm
2
- NO, NO
<
1 ppm
2
- NH
<
6 ppm
3
- N
O
<
0,25 ppm
2
Do not install the unit in atmospheres comprising inflammable
gases, or acidic or alkaline products. The copper/ aluminium
battery and the internal components could undergo irreversible
corrosion.
1.1.4 - Quality of water recommended for the water
coils
On receiving the installation, and then periodically every year, it
is recommended to carry out a bacteriological (detection of ferro-
bacteria, H
S producing bacteria and sulfate reducing bacteria)
2
and chemical analysis of water (in order to avoid the problems of
scaling and corrosion). The water circuit must include components
required for the treatment of water: filters, additives, intermediate
exchangers, purges, vents, isolating valves, etc. depending on
the results of the analysis.
The results of analysis must correspond to the values mentioned
below:
- Total hardness in mmol/l:
- Chloride [CL
]
-
- Sulphate [SO
2-
]
4
- Nitrate [NO
]
-
3
- Dissolved iron:
- Dissolved oxygen:
- Carbon dioxide [CO
]
2
- Resistivity:
20 Ω·m < Resistivity < 50 Ω·m
- pH:
1 < mmol/l
< 1,5
< 10 mg/l
< 30 mg/l
= 0 mg/l
< 0,5 mg/l
4 < [O
] < 9 mg/l
2
< 30 mg/l
6,9 < pH < 8
1.2 - Reservation for maintenance
42GR ATM requires some place to carry out its
maintenance. Changing the filter is done through the filter
access door (Fig. 6c) of the air treatment module (ATM).
1.3 - Reception - Place of installation
Upon reception, check the condition of the equipment, identify any
possible damage owing to transportation and send any complaint
regarding this to the transporter in writing. Do not unpack until the
final installation, as close as possible to the place of installation,
and do not place heavy tools on the packaging during the waiting
period.
1.4 - Supply voltage 230V ± 10% - 50 Hz
Check whether the supply voltage and frequency correspond to
those required for the unit to be installed.
CAUTION: Carrier suspends the effect of the warranty if these
points are not followed, or if electrical changes have been
made to the original connections.
11
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