4
ENG
| Installation and operating instructions
1. General
Airfix D diaphragm pressure expansion vessels are compliant with EU Directive 97/23/EC.
Certification is available at the manufacturer. Items included are one Airfix D
(A)
, one Airfix
TD T-piece
(B)
, the installation, operation and maintenance manual
(C)
, and an optional
AirfixControl maintenance fitting
(D)
. Information on the manufacturer, year of construction
and other technical data is displayed on the product label. Airfix D vessels are for use with
potable water systems. Airfix D vessels can also be used in pressurization systems.
Safety requirements
Install and operate Airfix D vessels only if the vessel is free from visible damage. In order to
keep within the operating parameters, appropriate safety accessories must be fitted.
Disregard of this manual may lead to defects in the vessel, impairment of its function,
personal injury or damage to property. To ensure a constant pressure in the mains water
supply to the Airfix D, a pressure reducing valve must be fitted upstream in the pipeline
after the water meter.
2. Installation
The Airfix vessel must be installed in combination with the Airfix TD
(B)
. Without the Airfix
TD the vessel will not have the flow-through function as required for DVGW or KIWA
approval. Maximum torque for connecting the flow-through device is 100 Nm.
The installation must be carried out by approved personnel only. Observe local regulations
at all times. Airfix D vessels 8 – 25 litres must be mounted hanging at the water connection
(F)
. If mounted to a wall, vessel support MB 2/ MB 3
(G)
is available as an accessory. Airfix
D 35 litre must be mounted to the suspension hook
(H)
with the water connection
(F)
pointing downwards. We recommend a combination with the AirfixControl maintenance
fitting
(D)
(available as an accessory).
1. Fit the Airfix TD T-piece
(B)
in the cold water feed pipe. The direction of water flow has
no
influence on the Airfix TD T-piece.
2. Apply synthetic tape
(J)
(PTFE) to the connection of the Airfix D (and AirfixControl)
(do not use hemp under any circumstances!).
3. Optional: screw the AirfixControl maintenance fitting
(D)
into the T piece.
4. Screw the Airfix D (or AirfixControl) into the T-piece.
First use
1. Shut off the water pipe
(K)
and remove pressure from the water system.
2. Set the pre-charge of the expansion vessel 0.2 bar lower than the set pressure of the
pressure reducing valve (please see the vessel label for the factory pre-charge):
• Remove the cap
(L)
and the plug
(M)
.
• Measure the pressure
(P)
.
• If the pressure is too high at the gas top-up valve
(S)
, blow off some gas. If the
pressure is too low, top it up, e.g. with a nitrogen canister.
Summary of Contents for Airfix D
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