32
Reduced load operation
The units are equipped with partialisation steps and can therefore
operate with reduced loads.
However, a constant and prolonged operation with reduced load
with frequent compressor(s) stops and start-ups can cause
irreparable damages due to the absence of oil return.
The above-described operating conditions must be considered
outside the operating limits.
In the event of a compressor breakdown due to operating in the
above-mentioned conditions, the warranty shall not be valid and
Clivet spa declines any responsibility.
Periodically check the average operating times and frequency of
compressor start-ups: indicatively the minimum thermal load
must be such as to require a compressor to operate for at least
ten minutes.
If the average times are close to this limit, take the proper
corrective actions, for example, increasing the water content of
the system is not enough in this application.
Check the water flow-rate of the evaporator
Check that the difference between the temperature of the
exchanger's input and output water corresponds to the potential
according to this formula:
unit cooling power (kw) x 860 = Dt (°C) x flow rate (L/h)
The cooling power is shown in the GENERAL TECHNICAL DATA
chart included in this manual, referred to specific conditions, or
in the COOLING PERFORMANCE charts in the TECHNICAL
BULLETIN referred to various conditions of use.
Check for water side exchanger pressure drops:
determine the water flow-rate
measure the difference in pressure between the exchanger’s
input and output water and compare it with the WATER-SIDE
EXCHANGER PRESSURE DROPS chart
Measuring the pressure is easier if pressure gauges are installed
as indicated in the DIAGRAM OF SUGGESTED WATER
CONNECTIONS.
6 START-UP
Summary of Contents for R513A
Page 1: ...R513A MANUAL FOR INSTALLATION USE AND MAINTENANCE WDAT ik4 120 1 580 2 MF500002 00 11 20...
Page 20: ...20 5 ELECTRICAL CONNECTIONS...
Page 34: ...34 7 CONTROL...
Page 35: ...35 7 CONTROL...
Page 36: ...36 7 CONTROL...
Page 37: ...37 7 CONTROL...
Page 52: ...52 9 ANTIVIBRATION MOUNTS...
Page 53: ...53 9 ANTIVIBRATION MOUNTS...
Page 73: ......
