Operation; Maintenance - Honeywell F78TS Installation Instructions Manual

8. Assembly
8.1. Installations Guidelines
• Install in horizontal pipework with filter bowl downwards
- This position ensures optimum filter efficiency
• Install shutoff valves
• Ensure good access
- Pressure gauges can be read off easily
- Simplifies maintenance and inspection
• The installation location should be protected against frost
• Fit immediately after water meter
- Corresponds to EN 806-2
8.2. Assembly instructions
1. Thoroughly flush pipework
2. Install filter
• Note flow direction
• Install without tension or bending stresses
3. Seal in pressure gauges
4. Install discharge connection
8.3. Discharge of reverse rinsing water
According to EN1717 the space between bottom von
discharge connection at the filter and the sewage piping
(e.g. drain connection with syphon) has to be 56mm at
least.
To do this there are 3 options:
1. Discharge into floor drain
2. Drain into open container
3. Discharge into drain connector with syphon (min. DN70)
Filter size Reverse rinsing volume*
DN65 - 100 55 litre
*at 4.0 bar inlet pressure and 22 s reverse rinsing duration
- operated by actuator or at 4 bar inlet pressure and 3x 3 s
rinsing duration - operated by hand.

9. Operation

Filter may only be operated with installed discharge
connection.
9.1. Reverse rinsing
Interval:
at least every 6 month (acc. to EN806-5)
every 2 months (manufacturer's recommendation)
resp. depending on the degree of dirt in the water.
Red pointer integrated into the view window of one of
the pressure gauges for setting the next reverse rinsing
Date for next reverse rinsing can be set at the memory
indicator of the outlet pressure gauge.
To ensure convenient and regular adherence to the
reverse rinsing interval, we recommend installing an
automated reverse rinsing system Z11AS.
During reverse rinsing, an inlet pressure of at least
1.5bar is required.
Filtered water can also be tapped during reverse
rinsing.
MU1H-1178GE23 R0816
GB
To avoid extra abrasion, we recommend to perform the
backwash at operating inlet pressures below 12 bar.
To ensure the proper backwash function also at
continuously higher media temperatures we advise to
follow the recommended service intervals. All the
internal parts should be checked to recognize possible
unusual abrasion.
9.1.1. Manual reverse rinsing
A collecting container must be positioned beneath
before reverse rinsing if there is not drainage system
available..
1. Slowly open the ball valve
• The patented reverse rinsing system starts
2. Close ball valve again after approx. 3-5 seconds. Repeat
procedure three times
• If the filter is extremely dirty, the procedure may have to
be repeated additional times
9.1.2. Automatic reverse rinsing with the Z11AS
The automated reverse rinsing system Z11AS is available as
an accessory. The automated system reliably takes over
reverse rinsing of the filter at intervals which can be set
between 4 minutes and 3 months.
9.1.3. Differential pressure controlled reverse rinsing
with the DDS76 and Z11AS
Also available as an accessory is the DDS76 differential
pressure switch. It provides fully automatic operation of the
reverse rinsing which is controlled by the differential pressure
across the filter. It actuates a reverse rinsing cycle when the
pressure differential between the inlet and outlet of the filter
reaches a predetermined value. If the pressure difference
exceeds the preset value, then the Z11AS reverse rinsing
actuator is operated via its volt-free input.

10. Maintenance

We recommend taking out a servicing contract with an
installation firm
In accordance with EN 806-5, the following measures must
be taken:
10.1.Inspection
10.1.1.Filter
Interval:
at least every 6 month (acc. to EN806-5)
every 2 months (manufacturer's recommendation)
resp. depending on the degree of dirt in the water.
An increased differential pressure between inlet and
outlet pressure gauge indicates a highly contaminated
filter.
• The filter must be cleaned by reverse rinsing regularly, at
least every 2 months
• Non-compliance can lead to the filter becoming blocked
This results in a drop in pressure and decreased water flow
• The filter meshes are made of stainless steel. A red
coating as a consequence of rust from the pipelines has no
influence on function or the way the filter works
Do not forget to do a visual check of the ball valve.
Replace if it is dripping!
7 Honeywell GmbH