Here is a link from a CFM publication for Lufthansa. It deals only with the CFM engine, not the IAE engine.
Ice and Rain Protection
Engine Anti Ice
A319 / A320 / A321
CFM 56-5A
30-21en
FRA US-E Bu July 1999 Page: Page: 286
ATA 30 ICE AND RAIN PROTECTION
Vacbi File: ENGINE ANTI ICE SYSTEM PRESENTATION
30-20 AIR INTAKE ANTI-ICE PROTECTION
ENGINE AIR INTAKE ANTI-ICE SYSTEM
PRESENTATION
Source
Air is bled from High Pressure Commpressor 5th Stage of each Engine.
Valve
For each Engine, hot bleed air is ducted via an ”ON/OFF” valve.
The valve is pneumatically operated,electrically controlled and spring loaded
closed.
Upon energization of the solenoid, the valve will close.
In case of loss of electrical power supply and pneumatic air supply available,
the valve will open.
It has a “Manual Override and Lock”. It can be blocked in the OPEN or in
https://www.metabunk.org/attachments...ine-pdf.16733/