Maintenance; Maintenance Schedule; Cleaning The Measuring Glass Of The Flowmeter; Cleaning The Rate Vale - Grundfos Vaccuperm VGA-113 Installation And Operating Instructions Manual

9. Maintenance

WARNING
Toxic material
Death or serious personal injury
‐
Cleaning and maintenance must be carried out by
authorised and trained experts.
‐
Observe the material safety data sheets (SDS) of the
handled chemicals.
‐
Wear personal protective equipment when handling
chemicals.
‐
Shut down the whole system before any work at the
system components and lines.
‐
The system must be pressureless.
‐
Separate the whole system from the power supply
before any work at the system components.
‐
Safety installations, which have been disabled during
maintenance, must be enabled again immediately
after maintenance.
‐
Tightly close inlet flanges and outlet flanges to prevent
humidity from getting in.
‐
Check the tightness of the whole system before
recommissioning.
Observe the manuals of the system and all other
components.

9.1 Maintenance schedule

• Check the tightness of the whole system monthly.
• Check the electrical grounding of the whole system according to
local requirements.
• Check the VGA-113 dosing regulator at least every 12 months,
before start-up and in case of malfunction.

9.2 Cleaning the measuring glass of the flowmeter

C
B
A
Dismantling the measuring glass of the flowmeter
Required tools and accessories:
• Hot water
• Soft brush
1. Unscrew the lower support (A+B).
2. Pull out the measuring glass (C).
3. Take off the plugs of the measuring glass and take out the ball.
4. Clean all parts with hot water, use a brush if necessary.
5. Replace damaged parts.
6. Dry all parts well.
14
Moist parts can cause corrosion.
Mount all parts in reverse sequence.

9.3 Cleaning the rate vale

A
C
D
E
F
G
Required tools and accessories:
• Hot water
• Soft brush
• Cylindrical pin, approx. 6 mm
• PTFE grease from the service kit
Do not use Vaseline for lubrication of the O-ring.
For versions with servomotor, observe the manual of the
servomotor.
1. Version with servomotor: Unscrew the servomotor.
2. Unscrew the adjusting knob (C).
3. Unscrew the holding spindle (F).
4. Remove O-Ring and flat sealing (G) of the holding spindle.
Do not damage the sealing edge of the valve seat.
5. Push out the seat with the cylindrical pin.
6. Take off the cap (only manual version) and remove the locking
ring (A) of the adjusting knob.
7. Remove the O-rings (E) of the adjusting spindle (D).
8. Clean all parts with hot water, use a brush if necessary.
9. Replace damaged parts.
10. Dry all parts well.
Moist parts can cause corrosion.