A.R.I. DC500 EN - Manual (Page 2)

up stream
shut-off valve #1
down stream
shut-off valve #2
#1
#3
#2
7
5
1
2
4
3
8
8
9
9
6
TROUBLE SHOOTING GUIDE
Check valve fails to hold 6.8 kPa. a. Outlet shut-off valve not closed
completely.
b. Outlet check valve fouled with
debris. a. Close outlet shut-off valve or
inspect for possible through leakage
b. Inspect and clean the seat and seal
of outlet check valve.
Symptom Cause Corrective Action
PARTS LIST
1. Cover Ass.
2. Retainer
3. Outlet Check valve Ass.
4. Inlet Check valve Ass.
5. Body Seal
6. Test Cocks (#1, #2, #3)
7. Body ass.
8. Clamp Ass.
9. Adaptor Ass.
No. Part