70
Armstrong International
Parc Industriel Des Hants-Sarts, 2ème Avenue No. 4, Haerstal, B-4040, Belgium
armstronginternational.com/brain
Problem: “High pitched noise from DRV80...”
Check motor
Motor may be worn, replace.
H C
Water pressure
Make sure supply pressures are balanced.
Check for the following:
• Air locks
• Blocked strainers
• Closed isolator valves
• Check inlet ow rates are within speci-
ed parameters. See Specications on
page 8.
Return to Hot
Water Supply Inlet
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