4
5
6.1
CHANGING ACTUATOR ADAPTERS
The RBC MVA timer is factory set to fit a 3/4 in. brass manual anti-siphon valve.
To install the controller with actuator on a 1 in. manual anti-siphon valve, the 3/4
in. seat washer and adapter must be removed and replaced with the 1in. adapter
and seat washer, which are included in this box.
1. Turn the actuator so that the seat washer and the 3/4 in. threaded adapter face up.
2. Using pliers, or a 5/16 in. wrench,
remove the seat washer screw by
turning counter clockwise and pull
off the 3/4 in. seat washer assembly
(see Figure A).
3. Push the 3/4 in. threaded adapter
down towards the actuator to
ease the tension on the retainer
clip (see Figure B).
4. Next, place your thumb on one
side of the retainer clip and with
a pair of pliers grip the other
side of the retainer clip and pull
outwards, away from your thumb,
and upwards, removing it from
the base of the 3/4 in. threaded
adapter then, remove the adapter
(see Figure C).
FIGURE A
FIGURE B
FIGURE C
5. Install the 1 in. threaded adapter
by pushing it onto the actuator
stem and making sure the notch
on the adapter lines up with the
notch on the stem of the actuator
(see Figure D).
6. Spread the retainer clip with your
thumbs and push the retainer into
the adapter until it clicks
(see Figure E).
7. Install the 1 in. seat washer
assembly as shown. Insert the seat
washer screw into the bottom of the
actuator stem and tighten turning
clockwise (see Figure F).
NOTE:
Do not over-tighten.
FIGURE D
FIGURE F
FIGURE E
