Airwell MQL 15 — общие рекомендации по безопасности установки и эксплуатации [4/40]
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Page 3
English
Safety
2 SAFETY
2.1 Foreword
These units must be installed in conformity with the
provisions of Machinery Directive 98/37/EC, Low
Voltage Directive 73/23/EC, Pressure Vessels Direc-
tive 97/23/EC, Electromagnetic Interference Direc-
tive 89/336/EC, as well as with other regulations
applicable in the country of installation. If these pro-
visions are not complied with, the unit must not be
operated.
The unit must be grounded, and no installa-
tion and/or maintenance operations may
be carried out before deenergising the elec-
trical panel of the unit.
Failure to respect the safety measures mentioned
above may result in electrocution hazard and fire in
the presence of any short-circuits.
Inside the heat exchangers, the compres-
sors and the refrigeration lines, this unit
contains liquid and gaseous refrigerant un-
der pressure. The release of this refrigerant
may be dangerous and cause injuries.
The units are not designed to be operated
with natural refrigerants, such as hydrocar-
bons. Itelco-Clima may not be held liable
for any problems deriving from the replace-
ment of original refrigerant or the introduc-
tion of hydrocarbons.
Itelco-Clima units are designed and manufactured
according to the requirements of European Standard
PED 97/23/EC (pressure vessels).
– The used refrigerants are included in group II (non-
hazardous fluids).
– The maximum working pressure values are men-
tioned on the unit’s data plate.
– Suitable safety devices (pressure switches and safe-
ty valves) have been provided, to prevent any
anomalous overpressure inside the plant.
– The vents of the safety valves are positioned and
oriented in such a way as to reduce the risk of con-
tact with the operator, in the event that the valve is
operated. Anyway, the installer will convey the dis-
charge of the valves far from the unit.
– Dedicated guards (removable panels with tools)
avoid contacts with potential dangerous zones.
.
The guards of the fans must be always
mounted and must never be removed be-
fore de-energising the appliance.
It is the User’s responsibility to ensure that
the unit is fit for the conditions of intended
use and that both installation and mainte-
nance are carried out by experienced per-
sonnel, capable of respecting all the recom-
mendations provided by this manual. It is
important that the unit is adequately sup-
ported, as detailed in this manual. Non-
compliance with these recommendations
may create hazardous situations for the
personnel.
The unit must rest on a base which meets
the characteristics specified in this manual;
a base with inadequate characteristics is
likely to become a source of serious injury
to the personnel.
The unit has not been design to withstand
loads and/or stress that may be transmitted
by adjacent units, piping and/or structures.
Each external load or stress transmitted to
the unit may break or cause breakdowns in
the unit’s structure, as well as serious dan-
gers to people. In these cases, any form of
warranty will automatically become null
and void.
The packaging material must not be dis-
posed of in the surrounding environment or
burnt.
2.2 Definitions
OWNER: means the legal representative of the com-
pany, body or individual who owns the plant where
Itelco-Clima unit has been installed; he/she has the
responsibility of making sure that all the safety regu-
lations specified in this manual are complied with,
along with the national laws in force.
INSTALLER: means the legal representative of the
company who has been given by the owner the job
of positioning and performing the hydraulic, electric
and other connections of Itelco-Clima unit to the
plant: he/she is responsible for handling and prop-
erly installing the appliance, as specified in this man-
ual and according to the national regulations in
force.
Manuale MQL-MQH 10.6.2005 12:26 Pagina 3
Содержание
- Mql mqh 4 17 p.1
- English p.2
- Technical data p.2
- Minichiller control p.2
- Troubleshooting p.2
- Start up p.2
- Dismantling demolition and scrapping p.2
- Spare parts p.2
- Transport lifting and positioning p.2
- Table of contents p.2
- Safety p.2
- Maintenance p.2
- Installation p.2
- General description p.2
- Foreword p.2
- Introduction p.3
- Foreword p.3
- Emergency stop normal stop p.3
- An introduction to the manual p.3
- Warranty p.3
- Safety p.4
- Foreword p.4
- English p.4
- Definitions p.4
- Access to the unit p.5
- Safety p.5
- Precautions against residual risks p.5
- General precautions p.5
- Safety p.6
- Precautions during maintenance operations p.6
- English p.6
- Safety p.7
- Entrée entrata p.7
- Ein inlet p.7
- Aus outlet p.7
- Sortie uscita p.7
- Safety labels p.7
- English p.8
- Safety regulations p.8
- Safety p.8
- Safety p.9
- Safety p.10
- English p.10
- Unit handling p.11
- Transport lifting and positioning p.11
- Storage p.11
- Inspection p.11
- Anchoring p.11
- Installation advices p.12
- Installation p.12
- English p.12
- Maintenance access p.13
- Installation p.13
- Fixing dimensions p.13
- Safety differential pressure switch p.14
- Installation p.14
- Water piping p.14
- Water connections p.14
- English p.14
- Tabella n 2 p.15
- Principle diagram of water circuit p.15
- Pressure drop in tubes and accessories p.15
- Page 14 p.15
- Installation p.15
- If the terminal unit is on a lower level than the mql mqh water chiller make sure the water pressure in the chiller is at least 0 bar p.15
- Hydraulic connection p.15
- Draining the defrosting waste water for heat pump unit only p.15
- When heat pump units work in heating mode dur ing defrosting cycles they may discharge water from the base p.15
- To determine the appropriated pipe section see table n 1 which shows the values of pressure drop for various water flows and the diameter of stan dard copper pipes for hydraulic installations p.15
- The water inlet outlet fittings shall conform to the in structions provided by the plates affixed neat the connection points p.15
- The mql mqh are to be connected with the termi nal units such as fan coil units cassettes or wall mounted units each terminal unit connected with the mql mqh water chiller and provided with its own control is therefore completely independent of the chiller see diagram of principle on the left p.15
- The heat pump units must be installed in positions where the defrosting water cannot create any dam age p.15
- The grey area shows pressure drop in mm of water gauge m and the velocity in m s recommended for various flows and diameters intermediate values are determined through interpo lation values outside the grey area correspond to exces sive pressure drops and should be avoided table n 2 shows the equivalent length pipe with the same diameter of a few common accessories for this type of installation p.15
- Table n 1 p.15
- Power supply p.16
- Installation p.16
- English p.16
- Electrical connections p.16
- Start up p.17
- Preliminary check p.17
- English p.18
- Delivery to the customer p.18
- Checking the operation p.18
- Start up p.18
- Minichiller control p.19
- Starting and using the unit p.19
- Operating instructions p.19
- Control system p.19
- Before start up p.19
- Failure diagnostics p.20
- The lack of the correct differential between dis charge pressure and suction pressure i e if the discharge pressure is just above the suc tion pressure p.20
- Meaning possible cause corrective action p.20
- In case of summer winter switching through re mote contact the unit will operate in cool ing mode when this contact is closed and in heating mode when it is open p.20
- If you exchange the connections of two out of three phases the compressor inverts the direc tion of rotation and these phenomena disappear suddenly p.20
- If the unit is powered by 3 phase current it is essential that the compressor turns in the correct direction the direction of rotation of scroll compressors is fixed the direction of rotation is wrong when while the unit is working you can feel p.20
- English p.20
- Control system p.20
- An anomalous noise in the compressor p.20
- Alarms table p.20
- Introduction p.21
- General specifications p.21
- General description p.21
- Water exchanger p.22
- General description p.22
- English p.22
- Coolant circuit p.22
- Compressors p.22
- Air exchanger p.22
- Page 22 p.23
- Outline refrigerator mql 10 17 p.23
- Outline refrigerator mqh hp 4 8 p.23
- General description p.23
- Outline refrigerator mqh 10 17 p.24
- General description p.24
- English p.24
- Page 23 p.24
- Technical data p.25
- Page 24 p.25
- Technical data p.26
- Page 25 p.26
- English p.26
- Technical data p.27
- Page 26 p.27
- Technical data p.28
- Page 27 p.28
- English p.28
- Unit electrical data p.29
- Technical data p.29
- Page 28 p.29
- Electrical data compressors p.29
- English p.30
- Technical data p.30
- Page 29 p.30
- Fans electrical data p.30
- Technical data p.31
- Page 30 p.31
- Overall dimensions p.31
- Mql mqh 4 8 p.31
- Mql mqh 10 17 p.31
- Technical data p.32
- English p.32
- Clearences p.32
- Planned maintenance p.33
- Maintenance p.33
- General requirements p.33
- Condenser p.34
- Compressor p.34
- Refrigerant charge p.34
- Maintenance p.34
- English p.34
- Dehydrating filter p.34
- Thermostatic expansion valve only mql mqh 4 8 p.35
- Maintenance p.35
- Evaporator p.35
- Troubleshooting p.36
- English p.36
- Troubleshooting p.37
- Oil for compressors p.38
- Wiring diagrams p.38
- Spare parts p.38
- Spare part list p.38
- English p.38
- Dismantling demolition and scrapping p.39
- Generalities p.39
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