Automate ValveLink 8 User Manual - Page 14

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care ful ly slice its heat-shrink tubing lon gi tu di nal ly

to remove it. The wires may have come apart or

Heat

broken here, inside the next piece of elec tri cal tape

shrink

on each

isolating the two leads, oth er wise within the cable

cable

or valve itself (which can be further de ter mined

with the volt/ohmmeter). If you fi nd the break, resolder the con-

nec tion, wrap the inner wires in separate pieces of elec tri cal tape,

retest the valve, and re as sem ble the sheath following the above

instructions in reverse order.

Valve returns & Replacing a Valve

If you need to return a defective valve, you may either re-

turn the entire valve assembly for repair / evaluation, or remove

and return the in di vid u al valve from its case. This only involves

fi ve screws: remove the two outer plate screws holding all of the

valves into the black metal case, the single screw holding the plas-

tic 'sheath' into its underside hole, the electrical tape at the top and

bottom of the sheath, the offending valve's cable from the plug end

up through the valve casing, and fi nally, the two screws holding the

valve on to the front plate.

Please package the valve(s) carefully and ship freight prepaid

to AutoMate's address on the back cover of this manual. No RMA

number is needed as long as you include a note with the following:

1) Your name, company/institution name, phone number, and

an ad dress to return the repair to.

2) Your original invoice number and date if available.

3) A sentence stating the nature of the problem and any steps

you have already taken to fi x or identify it. Does the valve energize

/ click? De-energize? Open / close? Leak?

4) Whether the valve was driven by any device other than an

AutoMate controller (and its operating and holding voltages).

5) The application used with the valve, along with the exact

chemical(s) and the duty cycle (pulse) rate if used.

6) A Statement of Chemical Exposure as follows:

a) These valves have not been exposed to chemicals other than H

except as de scribed above. b) All applicable Safety and Han dling data

sheets for the above described chemicals are enclosed. c) We accept full

responsibility for any injury to AutoMate employees or em ploy ees of

the valves orig i nal manufacturer caused by han dling of the res i dues

of chemicals contained in or on the valves to be returned.

7) An authorized signature, title, and date.

AutoMate will gladly fax you a form with easy blanks to enter

the above information. We will process your return and notify you

of further information as quickly as possible.

Leaks & Replacing valve fi ttings

The second bane of all liquid delivery apparatus! These hints

may help:

1) Make sure the valve is turned off! (as opposed to leaking)

2) See all of the guidelines in the previous "Faulty Valves"

section - es pe cial ly #1.

3) Identify whether the valve leaks constantly, under pressure,

inside or outside. Try backfl ushing if an internal leak.

4) Check and replace obvious loose or worn tubing.

5) Outside leaks usually occur at the fi ttings and can be

stopped with a bit of silicone glue, epoxy, super glue (Cy anoac-

ry late) or Tefl on tape around the threads of the dry fi tting screwed

back into the valve. Be sure not to use too much glue or tape, as

they can easily cause clogs or leaks of their own. Over tight en ing

can also cause the plastic fi ttings to leak – hand tighten.

Glue on valve fi ttings is intended as a gap fi ller for small open-

ings between the threads and hole, not as an ad he sive. Few glues

will adhere to Tefl on.

Hardware troubleshooting

Should the ValveLink LED's fail to light while power is turned

on, check your power connections, source and on/off switch. Dis-

con nect all valves to check for a short. Check the back panel fuse

on ValveLink16's. Finally, if all else fails, un plug the ValveLink and

check the fuse on the in ter nal circuit board following these in struc -

tions: ValveLink8 – remove all of the screws on the bottom and 6

hex D-con nec tor screws from the rear; or ValveLink16 – remove all

of the screws from the top cover. Only re place the fuse with a stan-

dard (not slow-blow) of the same size. One extra fuse is in clud ed on

the circuit board in clips labeled "Spare."