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1 - PRECAUTIONS
Only specially trained and
qualified technicians and
installers who have been
fully trained on the product
concerned are authorized
to install, to commission
and service this equipment.
In particular it is obligatory
to disconnect all power
supplies to the unit and its
a c c e s s o r i e s
carrying out any work.
1.1 - Operating limits
1.1.1 - Cooling mode
Cooling mode - Operating Limits
Min. inlet Temperature >5°C
ethylene / propylene glycol rate < 40%
Water circuit
Water side pressure < 15,5 bar (1550 kPa)
Ambient
T < 27°C / 65% relative humidity or
temperature
humidity weight < 14,7 g/kg dry air
and humidity
T > 12°C with maximum ambient humidity
Supply air
conditions (14,7 g/kg dry air)
temperature
1.1.2 - Heating mode
Heating mode - Operating Limits
Max. inlet Temperature < 80°C
ethylene / propylene glycol rate < 40%
Water circuit
Water side pressure < 15,5 bar (1550 kPa)
Ambient
T < 40°C
temperature
and humidity
T < 60°C with supply plenum and spigots
Supply air
application
temperature
1.1.3 - Operating environment
The 42EP has been designed for indoor application in
'urban' conditions having a non-corrosive, dust-free and
non-marine environment.
12
■
Do not install a unit where flammable gases or products
of an acidic or alkaline character may be present. The
copper/aluminium coil or components inside the unit
could suffer irreparable corrosion damage in their
presence.
1.1.4 - Recommended coil water quality
At installation handover, and then periodically every
year, it is advised to analyse the water for bacteria
(detection of Ferro-bacteria, H
sulphate-reducing bacteria) and chemicals (in order to
avoid problems due to corrosion and scaling).
b e f o r e
The water circuit must include all the necessary
elements for the treatment of the water: filters, additives,
intermediate exchangers, purges, drains, isolating
valves, etc., according to the analysis results.
■
1.2 - Clearances required
Base unit:
With rectangular flange:
With compact plenum:
With large plenum:
NOTE : All information's about dimensions and
weights are available in the PSD documentation on
Carrier Web portal
1.3 - Receiving a shipment -
installation methods
When receiving a shipment, check the condition of the
goods and report any damage in transit to the shipping
company. Do not unpack the units until just before they
are due to be installed, and make sure they are as close
as possible to the installation site when unpacking them.
Do not place heavy articles of any sort on them.
The concentrations of the following chemicals must
not be exceeded in any event:
- 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
The results must be in accordance with the values
shown below:
- Total hardness in mmol/l:
- Chloride [CL
-
]
- Sulphate [SO
2-
]
4
- Nitrate [NO
-
]
3
- Dissolved iron [Fe]:
- Dissolved oxygen [O
]:
2
- Carbon dioxide [CO
]
2
- Resistivity [R]:
- pH:
S-producing and
2
1 < mmol/l < 1,5
<10 mg/litre
<30 mg/litre
=0 mg/litre
Fe <0,5 mg/litre
4< [O
] < 9 mg/litre
2
CO
<30 mg/litre
2
20< R< 50 Ohm·m
6,9 < pH < 8
Fig.1
Fig.2
Fig. 3
Fig. 4
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