robatherm RM Series - Page 42

Commissioning and Maintenance
38 © robatherm
Maintenance
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Maintenance Interval
Every three months. ATEX units every month.
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Caution
Observe general safety instructions on page 3!
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Caution
Avoid any contact with brine while charging or venting. Danger of poisoning and acid burns!
Observe manufacturer’s instructions.
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Caution
To avoid burns, do not touch hot/cold surfaces.
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Caution
Before starting work allow components to cool/warm up to the ambient temperature.
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Cooling Coil – Periodic Maintenance
 Check cooling coil for hygiene, contamination on air side, damage, leaks and corrosion
 Vent cooling coil
 Check drip pan for contamination, clean if necessary
 Check water outlet and siphon function, clean if necessary
 Check water level in siphon refill if necessary
 Check inlet / outlet for function
 Check frost protection for function (determine anti-freeze concentration or thermostat by
means of cooling spray)
 Check direct expansion for icing
Cooling Coil – Maintenance when necessary
 Clean the cooling coil on the air side (see below), rectify damage, leakage and corrosion
Drop Eliminator – Periodic Maintenance
 Check drop eliminator for hygiene, contamination, encrustation, damage, drip erosion and
corrosion
Drop Eliminator – Maintenance when necessary
 Clean and service eliminator: Pull out cassette, disassemble and clean profiles
separately; rectify damage and corrosion
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Cleaning
Clean heat exchangers already assembled or if not accessible pull them out for cleaning.
Contamination which has been removed must not enter adjoining unit parts. Remove dirt and
contaminated water carefully.
Observe the following points:
 Avoid bending plate fins
 Blow out with compressed air in the opposite direction
 Do not use a high pressure cleaner or a high pressure steam cleaner
 Clean with water and low pressure
Cleaning Agents
Use cleaning agents with a pH-value between 7 and 9 if required.