C1 Faucet collections · Installation | 255 L90-E Installation, use and maintenance ONLY VANDAL-PROOF ELECTRONIC MIXER MODELS: A5A59..C00 A5A58..C00 2.5. FLOW RATE ADJUSTMENT OPEN 2,5 CLOSE It can be adjusted using a 2,5 Allen key from behind the faucet. WARNING: do not force the key after the lowest water ow limit is reached. 2.6. TEMPERATURE ADJUSTMENT 2,5 It can be adjusted using a 2,5 Allen key from behind the faucet, once the highest water ow level is reached. WARNING: do not force the key after the highest temperature limit is found.