Circulation Pumps; Air Coil; Decommissioning - Bosch CS 3000 AWP Installations- Und Bedienungsanleitung

Decommissioning

Water side heat exchanger
The exchanger must be able to provide the maximum thermal exchange.
Therefore it is essential for the inner surfaces to be clean of dirt and
build-up.
Periodically check the difference between the temperature of the supply
water and the condensation temperature: if the difference is greater
than 8°C–10°C it is advisable to clean the exchanger.
The clearing must be performed:
• With the circulation opposite to the usual one;
• With a speed at least 1,5 times higher than the nominal one;
• With an appropriate product moderately acid (95% water + 5%
phosphoric acid);
• After the cleaning rinse with water to inhibit the action of any residual
product.
CAUTION
Dirt trap
▶ Check that no impurities prevent the correct passage of water.
Consider that the flow switch controls the operations and remove
incrustations from the palette.
Unit booklet
Keep a unit schedule to keep trace of the interventions made on the unit.
It will become simple to adequately schedule the various interventions
and facilitate any troubleshooting.
On the schedule keep track of:
• The date;
• The intervention description;
• The carried out measures.
11.2

Circulation pumps

Please check:
• If there is no leaks;
• Bearing status (anomalies are highlighted by abnormal noise and
vibration);
• The closing of terminal covers and the correct positioning of the
cable glands.
Insulations
Check the condition of the insulations and, if necessary, apply glue and
renew the seals.
Safety valve
The pressure relief valve must be replaced:
• If it has intervened;
• If there is oxidation;
• Based on the date of manufacture, in compliance with local
regulations.
11.3

Air coil

CAUTION
Accidental contact with the exchanger fins.
Can cause serious cuts.
▶ Wear protective gloves
The coil must allow maximum thermal exchange, therefore, the surface
must be clear from dirt and scaling. It is recommended a quarterly
cleaning of the coils, as the minimum.
The cleaning frequency should be increased depending on the level of
dirt/dust accumulation and the environment (e.g., coastal areas with
chlorides and salts) or industrial areas with aggressive substances.
74
Shut down periods
During periods when the unit is not operated for longer than a week, the
coil must be completely cleaned following the cleaning procedure.
Cleaning procedure
Relative to tube and fin heat exchangers, these coils tend to accumulate
more dirt on the surface of the coil and less dirt inside the coil, making
them easier to clean. Follow the steps below for proper cleaning:
• Remove surface debris
– Remove surface dirt, leaves, fibres, etc. with a vacuum cleaner
(preferably with a brush or other soft attachment rather than a
metal tube), compressed air blown from the inside out, and/or a
soft bristle (not wire!) brush. Do not impact or scrape the coil.
• Rinse only with water
– Do not use any chemicals to clean heat exchangers, as they may
cause corrosion.
– Hose off gently, preferably from the inside-out and top to bottom,
running the water through every fin passage until it comes out
clean.
– The fins are stronger than others coil fins but still need to be
handled with care. Do not hit the coil with the hose.
– It is not recommended using a pressure washer to clean the coil
due to the possibility of damage. Warranty claims related to
cleaning damage, especially from pressure washers, or corrosion
resulting from chemical coil cleaners, will not be honoured.
12 Decommissioning
Disconnection
Before performing any operation, read the Maintenance chapter.
Avoid leak or spills into the environment.
Before disconnecting the unit, the following must be recovered, if
present:
• Refrigerant gas;
• Anti-freeze solutions in the hydraulic circuit.
Awaiting decommissioning and disposal, the unit can also be stored
outdoors, as bad weather and rapid changes in temperature do not harm
the environment provided that the electric, refrigerant and hydraulic
circuits of the unit are intact and closed.
WEEE Information
The manufacturer is registered on the EEE National Register, in
compliance with implementation of Directive 2012/19/EU and relevant
national regulations on waste electrical and electronic equipment.
This Directive requires electrical and electronic equipment to be
disposed of properly.
Equipment bearing the crossed-out wheelie bin mark must be disposed
of separately at the end of its life cycle to prevent damage to human
health and to the environment.
Electrical and electronic equipment must be disposed of together with
all of its parts.
To dispose of "household" electrical and electronic equipment, the
manufacturer recommends you contact an authorised dealer or an
authorised ecological area.
"Professional" electrical and electronic equipment must be disposed of
by authorised personnel through established waste disposal authorities
around the country.
In this regard, here is the definition of household WEEE and
professional WEEE:
CS3000 AWP – 6721852570 (2022/11)