Danfoss iC7 Series Operating Manual page 55

iC7 Series Cooling Modules
Operating Guide
Component Inspec-
tion inter-
val
(1)
Corrosive inhibi- 1 year
tors
Pre-mixed glycol 1 year
and inhibitor
coolant
Demineralized 1 year
water
Cooling system
Pipes, hoses, 1 year
valves, and con-
nections
Leak detector 1 year
Auxiliary equip- 1 year
ment
System cooling 1 year
capacity
Cooling system (external circuit)
Pipes, hoses, 1 year
valves, and con-
nections
Water quality 1 year
Coolant flow 1 year
Defined as the time after the commissioning/start-up or the time from the previous inspection.
1
Defined as the time after the commissioning/start-up or the time from the previous service schedule actions.
2
10.1.1 Maintenance Log for Cooling System
During the commissioning phase of the product and during each inspection refer to the maintenance schedule. Record values such
as the ambient air temperature, system pressure, flow, and input/output cooling liquid temperature during run condition. Record
the water chemical analysis values and the type and percentages of glycol and inhibitor or pre-mixed solutions of the liquid coolant.
The initial values create a base-line value to compare versus future values measured during preventive maintenance intervals. Re-
cord the chemical analysis values each time the liquid coolant is replaced. Record all the maintenance tasks and service tasks with
counter values, date, and time.
Danfoss A/S © 2022.02
Service Preventive maintenance actions
schedule
(2)
Based on When replacing the coolant in the drive circuit of the cooling system, measure
findings and record the level of Danfoss recommended corrosive inhibitor (Cortec-
VpCI-649, see specification). If inhibitor is below the 1% recommended level,
practice caution before adding more inhibitor not to exceed the level of electri-
cal conductivity.
Based on The pre-mixed coolants contain specific percentages of glycol and inhibitor for
findings antifreeze and corrosion protection. The advantage of using a pre-mixed coolant
is that the chemical composition is within Danfoss specifications, and there is no
need for analyzing the coolant.
Based on Only use demineralized, deionized, or distilled water in the coolant solution. Re-
findings cord and compare the chemical composition values when replacing or adding
coolant.
– Check for external signs of moisture, corrosion, and coolant leaks. Check the
tightness of the cooling pipe connections. Check the heat exchanger and host
pipes in the cooling system.
10 years Test the functioning of the leak detector.
According Check that the sensors, gauges, and indicators are functioning correctly. Act
to manu- based on findings.
facturer
recommen-
dations
Based on Test the cooling capacity and the thermal transfer of the system. Record the cool-
findings ant system flow, pressure, and input and output temperature, and compare to
the previous measurements. Act based on findings.
– Check for external signs of moisture, corrosion, and coolant leaks. Check the
tightness of the cooling pipe connections. Replacement interval for components
depends on the water quality and ambient conditions.
– Check the water quality on the external circuit side (particle size). If the water
quality is not sufficient, the heat exchanger can become clogged.
– Monitor the flow/pressure of the coolant. Organic sediment increases the pres-
sure loss over the heat exchanger and decreases the flow.
Maintenance
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