Remak AERO MASTER XP Series Installation And Operating Instructions Manual page 18

Operating Checks and Service Regulations
 Basic items of the service inspection:
- Cleaning of the external casing, covering parts and roofs of the air-
handling unit (see the chapter Cleaning)
- Cleaning of inlet and outlet chambers
- Replacement of filter inserts and cleaning of the chamber
- Inspection and cleaning of fans (condition and tension of belts,
greasing of bearings)
- Inspection and cleaning of the plate or rotary heat exchanger of the
heat recovery system
- Inspection and cleaning of heat exchangers, check of the circuit for
leakage
- Inspection of the cooling system, including filling with refrigerant, if
needed, performed by a cooling technician
- Inspection and cleaning of the humidification system (disinfection,
cleaning of jet nozzles, inspection of steam generator's containers)
- Inspection and cleaning of the condensate trays and condensate
drainage system
- Inspection of the electric heater
- Inspection of the gas heater section (adjustment of the burner
performed by an expert technician)
- Check of saturation (weight) of the carbon filter cartridges
- Inspection and cleaning of closing dampers (include adjustment)
- Inspection of elastic connections for tightness
- Cleaning of air ducts and all the end elements, inspection of
insulation
- Cleaning of other areas of the air-handling devices (service and air
mixing sections, etc.)
- Inspection of fire dampers (by an authorised technician)
- Repairs of corroded parts
- General cleaning of the air-handling plant
 The cleaning procedure is described in the following chapter:
Cleaning
 Inspection of the air-handling unit for cleanness and removal of
coarse dirt must be performed at least twice a year. It is advisable
to perform general cleaning associated with the air-handling unit
downtime as part of the service inspection at least once a year.
 When cleaning the air-handling unit, remove all dirt from external
and internal parts of the unit, including the covering roof (if
installed).
 Recommended methods of cleaning:
- Recommended cleaning solution – 10 parts dishwashing liquid,
45 parts Isopropanol, 45 parts water – pH 5–9. Do not use cleaners
containing active chlorine.
- Steam cleaning equipment (max. 50°C).
- When high-pressure cleaning equipment is used, there is a risk of
paint damage, especially in the elbows.
- Do not use brushes or similar abrasive tools and abrasive cleaning
agents!
To avoid differences in colour in some areas, first use the cleaning agent
on a small area to verify it does not damage the anti-corrosion protection
coating of the casing before using it on the entire area.
Uncleaned dirt deposited in the unit can be a source of bacterial
contamination and cause corrosion. In case of corrosion, the corroded
surface must immediately be treated with suitable anti-corrosion
protection.
Basic methods of cleaning each specific built-in assembly are described
below in these operating instructions, please see the chapter for the
corresponding built-in assembly.
18
Fan Inspection

Check the impeller for cleanliness.

Check the impeller for integrity and free rotation
 Check the assembly screw connections for tightening
Additional checks of fans with a belt drive
 Check the tightening of the Taper-Lock threaded pins
 Check the silent-blocks for condition (damage)
 Check the outlet fan assembly elastic sleeves
 Check the motor and fan bearings in the fan case.
 Check fan belts for wear (if necessary, all fan belts must be
replaced).
Checking the V-belts for tension
 The V-belts must be retightened after the first hour of operation.
Subsequent checks of belts for tension must be performed every
three months.
 To check the belt tension, it is advisable to use suitable equipment
(a belt tension tester). The following chart (graph 1) shows the
relation between the slack (S) and the distance of the belt pulleys
(A). The force "F" needed to slack the belt is determined according
to the belt type and the diameter of the smaller pulley.
 Turn the tensioning screw to set the proper belt tension
(see figure # 23)
 Excessive belt tension can cause overheating of the bearings and
damage or overloading of the fan motor.
 Too low belt tension can cause slipping and premature wear of
the belt.
 When changing the belt on a multi-grooved pulley, all the belts on
this pulley must be ganged!
Figure 22 – Belt tension adjustment
Figure 23 – Tensioning screw