Modine Manufacturing ECO SRE, Техническое руководство

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junction boxes for the power supply of the motors and junction
boxes for the power supply of the heaters the latter if electric
defrost is required.
11. If devices for the regulation of revolutions of the fan motors are
used, it is important to assess compatibility, as non-compatible
devices may generate noise and damage the fan motors. The
manufacturer does not guarantee the published performance
for models that are equipped with regulation devices.
12. Verify that the refrigerant line is adequate to the type of model.
Be especially careful when connecting the refrigerant circuit so
that the capillary tubes are not deformed or bent and the posi-
tion of the distributor is not modified.
13. Verify that the operating conditions (humidity, temperature and
pressure) are in accordance to those of model.
14. Ensure that at the end of each electric or hot gas defrost cycle
the finned pack of the coil is clean. Frost build-up tends to tran-
sform into ice, which is difficult to remove and may cause the
breakage of the heat exchanger.
15. For the models with electric defrost, in accordance to the type
of cold room, appropriately define the timing and the number of
heater ignitions (defrost cycles). Should temperature probes be
used they must not interrupt the correct defrost cycle, but be
used only as a safety device in case of possible overheating. If
end of defrost cycle temperature probes are used they must be
placed in the coolest areas of the heat exchanger (areas in
which frost/ice build-up is possible) and far from the heaters.
16. Access to the installed model, for service and/or maintenance,
must be carried out by qualified and experienced personnel in
compliance to the regulations in force.
17. Install siphons on the drain connections and check efficacy in
all operation temperatures.
General maintenance & control
1. The unit consists of a finned pack heat exchanger with copper
tube and aluminium fins, aluminium-magnesium casing, fan
motors equipped with internal thermo-contacts. For models
with electrical defrost, the shielded, stainless-steel, vulcanized
heater rods are placed and secured in the heat exchangers
and in the drip trays.
2. Before performing any maintenance make sure that electric
feed is disconnected from the main power source: as the elec-
trical parts may be connected to an automatic control system.
All maintenance operations must be carried out by qualified
and experienced personnel.
3. Periodically inspect fastenings, electrical connections and
connections to refrigerant installation.
4. It is necessary to periodically arrange the cleaning of the uni-
t’s casing with a 50%-50% solution of diluted ethyl alcohol and
water or a mild detergent. Do not use solvents, aggressive,
abrasive or ammonia-based solutions.
5. It is also necessary to periodically arrange cleaning of the fin-
ned pack - use an aqueous solution with 50% diluted ethyl
alcohol or eventually with some peroxide should greater clean-
liness/sanitation be required. Do not use solutions containing
ammonia or chlorine. Use mild detergent, soapy water, on
greasy residues then rinse thoroughly.
6. Check the efficacy of defrost. For models with electric defrost,
periodically verify the working condition of all heaters. The
manufacturer is in no way liable for defects and damage caused
by undetected malfunctions (e.g. damage due to ice build-up).
7. See to the replacement of malfunctioning electrical heaters. It
is important to pay particular attention during installation as to
avoid damaging the heaters; carefully reconnect the heaters
(see attached schemes) and fasten them in order to prevent
dislodgment during operation.
8. The testing and maintenance periods depend on the type of
cold room, therefore these must be determined by qualified
and experienced personnel.
9. For all other operations, not illustrated in this manual, contact
the manufacturer.
Technical features
SRE 7 mm fin spacing
- Capacity range: from 17,3 to 123 kW
- Air flow rate: from 14950 to 75700 m
3
/h
- External air static pressure: from 50 to 120 Pa
SRE 10 mm fin spacing
- Capacity range: from 11 to 86,8 kW
- Air flow rate: from 14950 to 73030 m
3
/h
- External air static pressure: from 50 to 150 Pa
SRE 12 mm fin spacing
- Capacity range: from 10,3 to 83,6 kW
- Air flow rate: from 14950 to 75700 m
3
/h
- External air static pressure: from 50 to 150 Pa
- Minimum electric protection grade: IP 54
- Maximum operating relative humidity: 100%
- Operating temperature: from –40 to 40 °C
- Exiting air velocity: approx. 3 m/s
Hazards / Risks
1. Electric shock. The model is equipped with fan
motors and electric defrost heaters. The supply
voltage is 400 V AC. It is important to use electrical
safety systems that are in compliance to the regu-
lations in force.
2. Burns. The surface of the electric defrost heaters
can reach the temperature of 350 ° C.
3. Cuts. The heat exchanger is made with fins with
sharp edges and the casing is made of sheet metal
parts.
4. Parts in motion. The model is equipped with fan
motors fitted with external protection.
5. Crushing. The weight of unit may exceed 1000 kg.
Reference standards
- MACHINES DIRECTIVE 2006/42/EC
- LOW-VOLTAGE DIRECTIVE 2014/35/UE
- ELECTROMAGNETIC COMPATIBILITY DIR. 2014/30/UE
- PED DIRECTIVE 2014/68/UE
- ERP DIRECTIVE 2009/125/EC