Rain Bird RC-4C User manual

1
RC-4C
RC-7C
RC-1260C
RC-7A
Instruction
Manual
RC-7A
(The RC-4C and RC-1260C Controllers have similar controls and features.)
DESCRIPTION OF CONTROLS Refer to Figure 1
A. HOUR DIAL with 23 CYCLE START PINS: The HOUR dial contains 23 pins for
scheduling automatic "Starts" on any hour (except midnight - which is day changeover
time). Embossed characters provide quick identification for each hour, AM or PM,
noon and midnight. Captive type pins are designed for simple push-pull operation.
B. DAY DIAL with 14 SCHEDULING PINS: The calendar DAY dial contains 14 cap-
tive pins for scheduling irrigation everyday or any day within a two week range. Each
pin represents a 24 hour period beginning at midnight. Embossed characters are on
the dial, adjacent to each day of the week.
C. STATION SELECTOR/INDICATOR DIAL: The STATION selector/indicator dial
contains the timing controls for each of the stations. The dial automatically rotates dur-
ing a watering cycle with the current station appearing at the top under the station
pointer. REST indicates the system is off and no watering is taking place. The dial is
also used for manual selection of any station for semi-automatic operation.
Figure 1

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D. STATION TIME CONTROL KNOBS: Individual TIME controls for each station.
Timing is adjustable from 3 to 60 minutes (6 to 60 minutes in the RC 1260C) to suit all
landscape growth requirements. A small white arrow moves with each knob along the
timing scale on the Station dial (C) for visual indication of the time setting. The scale is
marked-off in 5 minute graduations and the ratchet action of the knob provides for pre-
cision adjustment with each "notch" representing one minute increments. The OFF po-
sition eliminates the station from the watering schedule. All omitted stations are auto-
matically “rapid advanced” through, to the next timed station.
E. OPERATIONAL MODE SWITCH: The 2-position MODE switch (E) provides the
operating control for the system. AUTO position for automatic irrigation as scheduled
and "timed" watering of manually selected station. The OFF position is used for rainy
weather shutdown. This position eliminates controller "output" to the system valves
without interrupting the clock operation.
F. CIRCUIT BREAKER RESET BUTTON: Circuit overload reset button (F). A built-in
circuit breaker protects the controller from damage due to current overload. Push to
reset after the source of trouble has been remedied.
G. CURRENT STATION INDICATOR: STATION indicator (G) identifies the current
position of controller operation.
H. CURRENT TIME INDICATOR: TIME indicator (H) identifies the current time on the
controller clock.
I. CURRENT DAY INDICATOR: DAY indicator (I) identifies the current day of the wa-
tering schedule.
INSTALLATION
The RC Series controller’s cabinet is suitable for wall mounting in sheltered areas.
Three mounting holes are provided through the back surface of the cabinet. Before
mounting the controller, consideration must be given as to accessibility, electrical
power source and connections to the system control valves.
11”
6”
3”
63/4”93/4”
5/8”
7/8” DIA. INPUT
13/4”
CONTROLLER
OUTLINE
MOUNTING
HOLES
DOOR OPENS
TO LEFT
DOOR
11/8” DIA.
OUTPUT
CONNECTION
Figure 2
CONTROLLER MOUNTING
21/4”
7”
MINIMUM 6” FOR
ELECTRICAL
CONNECTIONS

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Valve Output Wiring
The controller transformer provides 26.5 VAC output for
the station valves. The output leads are color coded and
stamped with the corresponding station designations.
(See Figure 3.)
1. A 1/8" dia. hole is provided in the bottom of the cabinet
for connection of a 3/4" conduit fitting.
2. Connect one Lead from EACH valve to the desired
STATION OUTPUT lead using wire nuts. On “C” units,
connect one Lead from each valve to the desired station
output screw on the terminal strip.
NOTE: A maximum of four Rain Bird, 2 watt, solenoid
valves may be connected to each station output lead.
This applies when the Master Valve circuit is NOT used.
Refer to Figure 4 for variations of the station load capac-
ities.
3. Connect the second lead from all valves to the white
COMMON output lead. On “C” units, connect the second
lead from each valve to a “COMMON” wire and connect
that wire to a screw labeled “COM” on the terminal strip.
Record the valve locations or landscape zone identifica-
tion for each station on the label inside the cabinet door.
MOUNTING
1. Choose a location that provides a minimum clearance of 13" wide x 10" high. Since
the electrical connections are provided at the bottom of the cabinet, clearance should
be allowed for the conduit connections etc. (Refer to Figure 2.)
2. Remove the 4 panel mounting screws, carefully lift out the panel and disconnect the
wire harness at the connectors.
3. Position the cabinet on the wall at the mounting location, and with a pencil, mark
the 3 mounting hole locations on the wall. Two vertical holes are provided for mount-
ing to a wall stud.
4. Install the two top fasteners first. (Note: Use #10 screws).
5. Install the bottom fastener, and tighten all screws. With the cabinet mounted se-
curely to the wall, proceed with the wiring connections.
ELECTRICAL CONNECTIONS
ALL WIRING MUST BE INSTALLED AND CONNECTED IN ACCORDANCE WITH
LOCAL CODES. A basic wiring diagram, with color code identification is provided on
the inside surface of the cabinet for easy reference.
RC-7A
OUTPUT LEAD COLOR
CODE
Station 1........... Brown
2........... Red
3........... Orange
4........... Yellow
5........... Green
6........... Blue
7........... Violet
Master Valve.......... Black
Valve Common......... White
Figure 3.
VALVE OUTPUT IDENTIFICATION
NUMBER OF VALVES
PER STATION
TYPE OF
MASTER VALVE 2.0
WATT
Solenoid
None...............
2 Watt Solenoid........ 4 3
Figure 4.
STATION CAPACITY

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Master Valve Wiring
If a Master Valve is to be used, see Figure 4 for station capacity limitations.
1. Connect one lead from a 24 VAC Master Valve to the controller's black Master
Valve lead (in "C" models, connect to "MV" screw on the terminal strip).
2. Connect the other Master Valve lead to the controller COMMON (white) along with
the valve common leads (in "C" models, connect to "COM" screw).
CAUTION: If a master valve Is not being used on the RC-7A, be sure to tape the
end of the black Master Valve lead to prevent any possibility of "shorting."
Main Power Wiring (RC-7A)
The 120 V. step-down transformer is mounted a the lower left portion of the controller
cabinet.
1. Remove the 3 screws and cover plate at the bottom left side of the cabinet.
2. The 7/8" dia. hole in the bottom of the cabinet is provided for direct input connection
with a 1/2" conduit fitting.
3. Connect a 120 Volt-A.C. supply line to the LINE INPUT leads.
Main Power Wiring (RC-7C, RC-4C & RC-1260C)
The 120 VAC step-down transformer is mounted in the lower left hand comer of the
controller cabinet. A 1/2"-14 NPSM conduit nipple extends through the cabinet bottom
for connection to a conduit housing, junction box, or other approved attachment. Make
the electrical connections using wire nuts to connect the transformer leads (white to
white and black to black and green to green or earth ground) to the incoming 120 VAC
Pump Start Capability
The RC series controller can activate an optional 24 volt AC relay for use as a magnetic
starter switch for 117 and 220 volt pump motors. The Rain Bird PMC (pump motor con-
trol) connects to the controller using the "MASTER VALVE" and "VALVE COMMON" con-
nections (MV and COM). The high voltage power to the pump passes through the high volt-
age wires and relay in a second compartment in the PMC (see installation instructions with
the Rain Bird PMC).

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Electrical System Checkout
1. Rotate the STATION dial counterclockwise to position REST at the top directly un-
der the Station pointer.
2. Pull all pins on the HOUR and DAY dials to the "out" position.
3. Put the MODE switch in the AUTO position.
4. Turn on the main power at the source.
5. Adjust each station TIME control to the 5 minute mark. See Figure 6.
6. Rotate the STATION dial (counterclockwise) to position Station 1 under the pointer.
Watering should commence shortly as the automatic mechanism latches with the Sta-
tion dial.
The 5-minute interval should provide sufficient time to observe control valve operation.
If more time is required, simply adjust the timing knobs as necessary. The controller
will advance through each station, in sequence, providing opportunity to observe each
circuit for proper operation.
Upon satisfactory checkout of the system, proceed to adjust the controller clock.
CAUTION:
"Dead-Heading" a pump (running the pump's motor without water flowing through it)
may cause pump damage. It may also result in personal injury from hot water spraying
from the pump as a result of static water within the pump heating to a temperature
where plastic pipe and fittings may melt and discharge the water. ALL CON-
TROLLERS USING PUMP START RELAYS ON MASTER VALVE/PUMP START CIR-
CUITS MAY ENCOUNTER THIS PROBLEM. As a safeguard against such an incident
the following procedure is highly recommended.
All UNUSED stations on an electromechanical controller must be connected to a sta-
tion on the controller where a valve is present if a pump start relay is used to start a
pump. This installation method eliminates possible pump dead-heading if station tim-
ing is inadvertently programmed on a station where a valve is not present. See details
below.

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Example: If the correct time is 1:35 PM,
position the dial such that the TIME
pointer will point midway between the 1
and 2 numerals on the PM side of the
dial. If a more precise adjustment is de-
sired, the best procedure would be to
push-in the pin corresponding to the up-
coming hour (in this example, the 2 PM
pin) and on that hour, slowly rotate the
dial until you hear the "click" of the
micro-switch.
3. Proceed to set the present day by ro-
tating the calendar DAY dial to position
the correct letter opposite the DAY
pointer at the bottom of the dial. (See
Figure 5.)
4. Next, rotate the STATION dial in a
counterclockwise direction to position
REST at the top under the STATION
pointer.
This completes the controller clock set-
ting.
SCHEDULING AUTOMATIC OPERATION
Before proceeding to set the automatic schedule, be sure the HOUR and DAY dials
are adjusted for the correct time and all pins are in the “out” position.
1. Push in the pin(s) corresponding to the day(s) on which watering is desired. Re-
member, each DAY pin represents a 24 hour period beginning at midnight.
2. Next, select the desired starting time(s) and push in the corresponding pin(s) on the
HOUR dial. Multiple “starts” within a given day may be scheduled after completion of
the time accumulated by the previous cycle; see NOTE following Step #3.
3. The first mark (square dot on the station dial) is the minimum time setting and rep-
resents approximately 3 minutes. The small white arrow moves with the knob for visual
indication of each setting. (There will be no valve output when the arrow is positioned
between "off" and the "square dot'') The ratchet notches represent 1 minute incre-
ments for precise settings. The OFF position at each timing dial omits the station from
the schedule.
SETTING THE CONTROLLER
With the main power ON, proceed to adjust the clock for the correct time and day.
1. Put the MODE switch in the OFF position.
2. Rotate the HOUR dial (clockwise only) to position the current time opposite the
TIME pointer at the top of the panel. Observe the dial for the correct AM or PM numer-
als.
5

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NOTE: On the RC-7 and -1260 series, the mini-
mum accumulated cycle time required to prevent
a second start within a given hour is 20 minutes.
Conversely, the maximum accumulated time to
permit a cycle start on a consecutive hour is 55
minutes. Total cycle time of more than one hour
is permissible.
NOTE: It takes about 20 minutes for the hour
dial pin that started a watering cycle to move off
the cycle-start switch behind the face panel. To
make sure the RC-4C will not start another cycle
when the combined running time of stations 1
through 4 is less than 20 minutes, the controller
will stop at the non-existent station 6 position,
and time out 20 minutes before returning to
SEMI-AUTOMATIC OPERATION
The controller may be operated at any time in a semi-automatic mode simply by turn-
ing the STATION dial counterclockwise to position the desired station at the top, just
ahead of the Station pointer. Allow the automatic mechanism to advance into the de-
sired timing zone. The selected station will operate for the time set on the dial, after
which, the remaining stations will follow in sequence until the REST position again ap-
pears under the Station pointer.
RAIN SHUTDOWN
There may be occasions where it is desired to interrupt all landscape irrigation. Condi-
tions such as rainy weather, system repair, landscape renovation, or other excavation
work. The temporary shutdown of the system is accomplished by moving the MODE
switch to the OFF position. This eliminates controller output to the valves without inter-
rupting the controller timing circuitry. The controller will not operate either automati-
cally or semi-automatically.
A summary of the operating instructions is provided on the label inside the controller
door.
MAINTENANCE
The controller is designed to provide years of trouble-free service. The controller re-
quires no preventative maintenance or lubrication. Should trouble occur, refer to the
Troubleshooting chart for possible remedies, or contact your local authorized Rain
Bird dealer.
This completes the automatic setting of the controller. Move the MODE switch to the
AUTO position. The controller will now automatically control the landscape irrigation
according to the schedule.

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TROUBLESHOOTING CHART
DIFFICULTY POSSIBLE CAUSE REMEDY
Clock stopped. a. Circuit Breaker Tripped a. Push RESET. If controller
stops again, check system
circuits to locate trouble
b. No power to controller. b. Check line voltage and
connections at each end.
DAY and HOUR dials
function incorrectly. a. Clock set for incorrect
time.
b. Pins incorrectly set.
a. Reset clock for the
"present" time.
b. Check pin settings and
"accumulated cycle time on
station dial.
DAY and HOUR dials
function, but cycle will not
start automatically.
a. MODE switch in wrong po-
sition. a. Move switch to AUTO po- sition.
Controller recycles imme-
diately without stopping in
the REST position.
a. Insufficient cycle time al-
lowed.
b. Total cycle time coincides
with a succeeding START
pin.
a. Adjust cycle time for more
than 15 minutes.
b. Reset the HOUR pins or
readjust the accumulated
cycle time.
Some stations do not op-
erate. a. Station time set at OFF.
b. Faulty valve wiring.
a. Set TIME control for more
than 3 minutes.
b. Check connections be-
tween controller and valves.
Also, check valve actuators.
Station dial does not stop
at a "Timed" station a. Insufficient time set on
dial. a. Adjust the TIME control for more than 3 minutes.
Should trouble be isolated in the controller mechanism, remove the entire panel as-
sembly from the cabinet and return to your local distributor for repair.
Customer Support Center
6640 S. Bonney Ave. Tucson, AZ 85706
1-800-RAIN-BIRD
HAVE A QUESTION, PROBLEM OR COMMENT?
Our Technical Services toll-free phone number is: 1-800-RAIN-BIRD.