Honeywell BA298F Notice D'installation page 7

7.2 Assembly instructions
1. Thoroughly flush pipework
2. Ensure that connections on back flow preventer are
clean
3. Install backflow preventer
• Install in horizontal pipework with discharge connec-
tion directed downwards
• Note flow direction (indicated by arrow)
o Install without tension or bending stresses
• Provide a straight section of pipework of at least five
times the nominal valve size after the backflow
preventer
• Observe required clearances
• Connect discharge pipework close coupled and
without tight bends according to connection dimen-
sions (see table)
• Install discharge pipework in such a way that the
discharge connection and the discharge valve can
be removed for inspection
8. Maintenance
We recommend a planned maintenance
contract with an installation company
Maintenance of backflow preventer must be
carried out by authorized personnel!
8.1 Inspection
• Frequency: every 6 month (depending on
local operating conditions)
• To be carried out by an installation company
• Inspection with a test control unit and mainte-
nance-set (see accessories)
The inspection should also include ancillary equipment
such as strainers and shutoff valves.
8.1.1 Testing inlet check valve
Take note of the instructions of the test control
unit TKA295 or TK295
1. Procedure according to instruction of the test control
unit TKA295 resp. TK295
Honeywell GmbH
GB
8.1.2 Testing discharge valve
Take note of the instructions of the test control
unit TKA295 or TK295
1. Procedure according to instruction of the test control
unit TKA295 resp. TK295
Quick test for the discharge valve:
• Lower the inlet pressure
o if the discharge valve opens (it drops), the
function is o.k.
8.1.3 Testing outlet check valve
Take note of the instructions of the test control
unit TKA295 or TK295
1. Procedure according to instruction of the test control
unit TKA295 resp. TK295
8.2 Maintenance
We recommend a planned maintenance
contract with an installation company
In accordance with DIN EN 1717 a regular mainte-
nance must be taken.
Frequency: every 1-3 years (depending on local
operating conditions)
To be carried out by an installation company
Under no circumstances may check valvesand
discharge valves be disassembled. To doso is
highly dangerous!
8.2.1 Discharge valve
1. Close shut off valve on inlet
2. Release pressure on outlet side (e.g. through water
tap)
3. Close shut off valve on outlet
4. Unscrew pressure control line
5. Loosen screws, pull the discharge connection
downwards and unscrew the discharge valve with
the aid of an oil filter strap wrench.
6. Remove the discharge valve
o Clean or replace as required
7. Lubricate the 'O' ring well with grease, replace
damaged 'O' rings
8. Reassemble in reverse order
9. Test function (see chapter inspection)
7 MU1H-1218GE23 R0307