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English: 12
New Install - Always Pressure Up Slowly (Follow start up on page 9)
Problem
Cause
Solution
No Clicking
Sound
Fluid not flowing through unit
Are the red plugs at the inlet, outlet and suction tube fitting openings removed?
Is the unit installed backward? The arrow on the unit must point in the
direction of the fluid flow.
Has the new injector been stored for an extended period. If so, submerge the
injector in room temperature fluid for 24 hours so that the working parts can
reabsorb fluid and swell back to the proper size.
If still not clicking, do not open the upper body. Call Dosmatic Customer
Service.
Fluid flowing through unit
Fluid rate is below or exceeds rated service flow of injector. (see Specifications
for maximum flow rate page 6).
If below increase flow rate, if above, reduce flow rate.
Operating pressure exceeds maximum limit. Install a pressure reducer valve.
(see Specifications for maximum flow rate page 6).
On/Off Lever in off position. Place the On/Off lever switch to the ON position.
By-Pass Valve not closed. Check and set valve to the ON position.
Problem
Cause
Solution
Clicking
Sound
No Suction Of
Solution
Cracked or loose Suction Hose
Check for proper fit and /or replace.
Dosage piston #44 (0.3% model
#51) worn or installed incorrectly
Replace. Ensure during maintenance replacement that #44 dosage
piston was installed correctly flared-end up.
O-ring retainer #15 installed
incorrectly
Install correctly.
O-ring seat #14 or dosage piston
#44 (0.3% model #51) damaged
Replace.
#17 O-ring worn and/or loose
Replace.
Suction tube #25 or suction tube
fitting #11 cracked, leaking or
clogged suction tube filter
Replace and/or clean as necessary.
Check valve #13 leaking
Clean & replace as necessary.
Problem
Cause
Solution
Fluid
Re-filling
Solution Tank
Check valve #13 leaking
Check seat area on suction tube fitting #11. Check valve and seal must
fit loose in the suction tube fitting. Clean seal and inside fitting for debris.
Washer seal on #13 is swollen or
chemical attack
Replace with new check valve assembly.
Problem
Cause
Solution
No Clicking
Sound
Main Piston Assembly #9 worn
Replace # 9 Main Piston Assembly. Clean fluid filter.
Cover #1 or main body #40 worn
or scored
Lightly sand inside diameter of bores to remove grooves. Install or clean
fluid filter.
On/Off Lever in off position
Place the On/Off lever switch to the ON position.
By-Pass Valve not open
Set Valve to the closed position.
Dirty or plugged inlet filter
Ensure mesh size is correct for proper filtration. Clean filter.
#17 Worn or not seated properly
Re-seat #17 or replace.
Troubleshooting
Injector in Operation or After Scheduled Maintenance
Problem
Cause
Solution
Clicking
Sound.
Under
Injecting
#44 (0.3% model #51) Dosage
Piston worn
Replace.
#7 Inner Cylinder worn
Replace.
Unit operates at high-flow and not
at low flow
Replace #17 O-ring.
Main Piston Assembly #9 worn
Replace # 9 Main Piston Assembly. Clean fluid filter.
Cover #1 or main body #40 worn
or scored
Lightly sand inside diameter of bores to remove O-ring grooves. Install or
clean fluid filter
.