Honeywell GmbH
6
MU1H-1251GE23 R0916
GB
1. Safety Guidelines
1. Follow the installation instructions.
2. Use the appliance
according to its intended use
in good condition
with due regard to safety and risk of danger.
3. Note that the appliance is exclusively for use in the appli-
cations detailed in these installation instructions. Any
other use will not be considered to comply with require-
ments and would invalidate the warranty.
4. Please take note that any assembly, commissioning,
servicing and adjustment work may only be carried out by
authorized persons.
5. Immediately rectify any malfunctions which may influence
safety.
2. Application
3. Technical data
4. Scope of delivery
The backflow preventer consists of:
Upper housing part with pressure reducing valve and test
socket incl. plug
Adjustment handle pressure reducing valve
Complete tested replacement unit with
- rotatable lower housing part with test socket incl. plug
- Strainer (mesh size 0.5 mm)
- Valve cartridge with integral check valve and discharge
valve
- Outlet check valve
- Retaining clip
- Seal bracket
- Pressure gauge
Threaded adapter
Two test sockets (third is integrated in the blind plug of the
optionally available maintenance set WS295STN)
5. Options
6. Assembly
6.1. Installations Guidelines
Direct installation under distributor or water tap with
discharge connection downwards
Backflow preventers of this type have an integral strainer
which protects the device from the ingress of dirt. With
highly polluted water a fine filter should be installed upst-
ream to ensure the correct function of the device.
The installation location should be protected against frost.
For use on outside taps, the backflow preventer has to be
dismounted if there may be danger of frost.
6.2. Assembly instructions
1. Close shutoff valve upstream the valve
2. Direct installation under distributor or water tap with
discharge connection downwards
3. Seal backflow preventer and tap using included seal
bracket
4. Install 1" intenal to 3/4" external thread adapter if neces-
sary and connect hose
5. For inside installation fit discharge pipe connection and
connect to discharge
6. Open shutoff valve upstream the valve
7. Set outlet pressure on pressure gauge
7. Maintenance
7.1. Inspection
Inspection with a test control unit and maintenance-set (see
accessories)
7.1.1. Testing discharge valve
1. Install test adapter on outlet (see maintenance-set)
2. Procedure according to instruction of the test control unit
TKA295 resp. TK295
Medium
Drinking water
Maximum inlet
pressure
10.0 bar
Outlet pressure
1 - 4 bar pre-settable
pre-set to 1.2 bar ± 0,3
Minimum inlet pressure
1.5 bar
Installation position
Vertical with discharge valve
downwards
Max. operating
temperature
65 °C
Minimum pressure drop
1 bar
Discharge pipe
connection
DN40
Nominal diameter
3
/
4
"
BA295D-3/4WHD = Standard version with pressure reducing
valve in upper housing part, chrome
plated, with discharge pipe connection
inlet with G3/4" (ISO 228-1)
outlet with G1" (ISO 228-1)
1" intenal to 3/4" external thread adapter
included
Set outlet pressure min. 1 bar under inlet pressure.
We recommend taking out a servicing contract with an
installation firm
Frequency: every 6 month (depending on local
operating conditions)
To be carried out by an installation company
For testing the shutoff valve must be fully open.
Take note of the instructions of the test control unit
TKA295 or TK295
Quick test for the discharge valve:
Lower the inlet pressure
- if the discharge valve opens (it drops), the function
is o.k.