Hydrotech 89-series Control Valve Injector Replacement

Locate the RED bypass knobs.

Using an allan key or a pair of pliers, turn the knobs so the stamped arrows are facing each other.

CAUTION: The bypass knobs may become detached, if this happens take note of the position of the knob and return the knob to that position and press down to reseat it.

IMPORTANT: Verify the valve is in bypass before proceeding.

Unlock the valve.

Press and hold the {MENU} key until the valve beeps/the padlock icon disappears.

Activate manual regeneration

After the valve is unlcoked, press the [MENU] button once more to bring up a menu prompt.

Repeatedly press the {DOWN] button until "Manual Regen" is selected.

Press Set

Use the [UP} arrow to select "Regen Now" and press {SET} to begin the regeneration process.

Press and hold any button for approximately 3 seconds to skip ahead, do this until the valve is in either BACKWASH or RINSE.

Wait until the time begins to count down to ensure it is has relieved pressure

Note: If you have a Downflow valve or are using this valve on a filter your first regeneration cycle will be BACKWASH, you won't need to skip ahead.

Note: The valve may take a couple of minutes to move between cycles, please be patient with it.

Removing the Injector Cover (A36)

Remove the two #2 Phillips screws (A4) from the injector cover (A36) and remove with your fingers.

Remove the Injector Screen (A37) using your fingers or a pair of tweezers.

Note: In most cases this part may be gently cleaned rather than replaced.

Remove Injector Nozzle (A33)

Using a 1/4" flat blade screwdriver, turn the Injector Nozzle counterclockwise to unscrew.

Remove Injector Throat (A31)

Using a 3/16 Flat Blade screwdriver (or iFixit #4 flat blade bit) turn the injector throat counterclockwise to unscrew.

Using a pair of reverse tweezers, remove the injector throat.

REASSEMBLY

To reassemble, insert the injector throat, injector nozzle and injector screen in reverse order of removal.

Prior to reinstalling the Injector Cover (A36) and reinstalling the screws, apply a layer of silicone grease to the o-ring (A35), this will allow the o-ring to reseal to the valve body properly.