00197469-02_SM_Twin_Kunde_EN - 第27页
4 Pneumatic and pressure control valve (PRV) 4.2 Replacing the pressure control valve (PRV) Service Manual SIPLACE TwinStar (Twin, Twin HF, Twin VHF) 07/2020 27 4.2 Replacing the pressure control valve (PRV) NOTICE Head …
4 Pneumatic and pressure control valve (PRV)
4.1 Replacing the air filter
26 Service Manual SIPLACE TwinStar (Twin, Twin HF, Twin VHF) 07/2020
CAUTION
Observing the orientation
Observe the orientation of the replacement filter.
► The replacement filter is pushed thicker end first into the lower opening of the air fil-
ter.
► Otherwise the air filter could be damaged.
CAUTION
Housing could break
Take care when screwing the housing into place.
Preparation
► Remove the head from the machine. For details about removing and fitting the placement
head, refer to the service manual for your machine.
Removal/installation
Removal and installation of the air filter follows the same procedure as that for the pressure control
valve.
4.2 "Replacing the pressure control valve (PRV)" [}27]
Observe the following instructions:
► Tighten the air filter cover and the two fastening screws hand-tight.
4 Pneumatic and pressure control valve (PRV)
4.2 Replacing the pressure control valve (PRV)
Service Manual SIPLACE TwinStar (Twin, Twin HF, Twin VHF) 07/2020 27
4.2 Replacing the pressure control valve (PRV)
NOTICE
Head board function state
The head board must have a function state of at least 09.
NOTICE
Converting the analog/digital PRV
► To convert the analog PRV to a digital one, read the retrofit instructions "Digital pres-
sure control valve and new TH air filter" [DEEN:00196286‑xx].
Parts
●
Digital pressure control valve for the TwinHead [03058802-xx] (suitable for all Twin types)
Overview
Fig.26: PRV and air filter (example of Twin VHF shown)
1. Air filter assembly [03051420-xx]
2. Screws fastening the air filter
3. Digital pressure control valve for the
TwinHead [03058802-xx]
In contrast to the analog version, the digital
PRV has a thin high-precision tube (addi-
tional volume tube) in the vacuum supply to
the nozzle. Between this tube and the
vacuum connection of the PRV, there is an
air filter attached to the Twin module.
Preparation
► Remove the head from the machine. For details about removing and fitting the placement
head, refer to the service manual for your machine.
Removal
► Dismantle the buffer on the return unit.
3.1 "Replacing the return unit buffer" [}17]
► For Twin VHF only:
Dismantle the head main board.
(in the Twin VHF the PRV is removed upwards, in the Twin and Twin HF, it is pulled sideways
out of the head.
5.1 "Replacing the head main board" [}65]
4 Pneumatic and pressure control valve (PRV)
4.2 Replacing the pressure control valve (PRV)
28 Service Manual SIPLACE TwinStar (Twin, Twin HF, Twin VHF) 07/2020
Fig.27: Screws fastening the air filter (example of Twin /
Twin HF shown)
► Only for Twin / Twin HF:
Loosen the two screws(1) fastening
the air filter, so that the air filter can be
moved easily but the screws can not
fall out.
Fig.28: Push the air filter into the head (example of Twin /
Twin HF shown)
► Only for Twin / Twin HF:
Turn the air filter onto its side(1) and
push it through the opening(2)
into the
inside of the head.
Fig.29: Screws fastening the air filter (Twin VHF)
► Only for Twin VHF:
Take off the filter cap and remove the
two screws(1)
fastening the air filter,
so that the air filter can move freely.