Honeywell CA295 Backflow Preventer Instruction Manual

CA295 Backflow Preventer
Instruction Manual

Keep instructions for later use!

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 applications detailed in these installation instructions.
   Any other use will not be considered to comply with requirements 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.

Description of function

Backflow preventers are divided into three zones – inlet-,middle- and outlet zone.
When the differential pressure between inlet zone and middle zone drops below under 10 % of inlet pressure the backflow preventer discharges by venting the middle zone  to atmosphere.
There is no possibility to control the safety arrangement by measuring.

Application

Technical data

Discharge pipe
connection| HT 40
Approvals (DN15)| KIWA-UK
KIWA
WRAS
BELGAQUA
NF
tested according to EN 14367
Noise class 1| DN15
Noise class 2| DN20

Scope of delivery

The backflow preventer consists of:

• Housing
• Integral strainer
• Valve cartridge
• Outlet check valve
• Connection fittings
• Discharge connection

Assembly

6.1. Installations Guidelines

• Install shutoff valves before and after backflow preventer

• Install in horizontal pipework with the discharge valve downwards

• Ensure good access
  – Simplifies maintenance and inspection

• 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 upstream to ensure the correct function of the device.
  – This protects the appliance against dirt

• Do not install in places where flooding can occur

• The installation environment should be protected against frost and ventilated well

• Install discharge pipework which has adequate capacity

6.2. Assembly instructions
The rules of the drinking water regulation must be considered during the assembly!

1. Thoroughly flush pipework

2. Install backflow preventer
   • Install in horizontal pipework with discharge connection directed downwards
   • Note flow direction (indicated by arrow)
   • Install without tension or bending stresses

3. Attach drain pipe to discharge connection (plastic pipe HT 40)

Maintenance

We recommend taking out a servicing contract with an installation firm In accordance with DIN EN 1717 a regular maintenance must be taken.

7.1. Inspection
7.1.1. System disconnector
Interval: once a year
To be carried out by an installation company or the operator.

1. Close shutoff valve on inlet

2. Open the drain point on the inlet side of the shut-off ball  valve.
   • If the differential pressure between middle and inlet chambers is less than 10 % of the inlet pressure, the system disconnector moves into disconnect position (back  suction). The inlet side backflow preventer closes and the discharge valve opens.
   Discharge valve does not open, replace backflow preventer!

3. Close the drain point on the inlet side of the shut-off ball valve

4. Slowly open shutoff valve on inlet

7.1.2. Tightness
Interval: once a year
To be carried out by an installation company or the operator.

1. Open sampling point
   • Backflow preventer changes into flow position.

2. Optical control backflow preventer of location and tightness.
   Water is escaping from backflow preventer call Technical Customer Service!

Disposal

• Dezincification resistant brass housing
• High-quality synthetic material valve cartridge
• High-quality synthetic material check valves
• NBR and EPDM seals
• High-quality synthetic material discharge connection Observe the local requirements regarding correct waste recycling/disposal!

Automation and Control Solutions

Honeywell GmbH
Hardhofweg
74821 MOSBACH
GERMANY
Phone: (49) 6261 810
Fax: (49) 6261 81309
http://ecc.emea.honeywell.com

Manufactured for and on behalf of the Environmental and Combustion Controls Division of
1180 Rolle, Switzerland by its Authorised Representative Honeywell GmbH
MU1H-1225GE23 R0616
Subject to change
© 2016 Honeywell GmbH

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