robatherm RM Series - Page 37

Commissioning and Maintenance
© robatherm 33
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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
To avoid burns, do not touch hot surfaces.
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Caution
Before starting work allow components to cool/warm up to the ambient temperature.
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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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Heating Coil – Periodic Maintenance
 Check heating coil for hygiene, contamination on air side, damage, leaks and corrosion
 Vent heating coil
 Check inlet/outlet for function
 Check frost protection for function (determine anti-freeze concentration or thermostat by
means of cooling spray)
Heating Coil – Maintenance when necessary
 Clean the heating coil on the air side (see below), rectify damage, leakage and corrosion
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Cleaning
Clean coils 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.
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Shut Down
If out of operation for some time, especially if there is a danger of freezing, the heat
exchanger must be emptied completely if no anti-freezing agent was added. For this purpose
remove all purging and discharging screws. Then for complete emptying blow air
(compressed air, fan etc) through each heat exchanger as up to 50% fluid may remain in the
heat exchanger during free purging which results in a higher danger of damage during frost.
Remove brine following manufacturer information.