Installation / Operation
4
Torque Values for Terminals:
• Torque the input power terminals to 16 lb.-in.
• Torque the motor output terminals to 12 lb.-in.
• Torque the auxiliary terminals, transducer terminals,
and run/stop terminals to 5-7 lb.-in.
• All low voltage field wiring terminals to be wired
with Class 1 wiring.
NOTE:
If you must replace the Control cover
O-Ring, apply Scotch-Grip #847 adhesive to the
O-Ring groove in the Control cover. Apply one drop
in each corner and one drop midway down each
side. Follow the adhesive manufacturer’s instructions
for proper ventilation, preparation, and cleanup.
Place the O-Ring in the groove and apply even
clamping pressure all around the O-Ring.
4. Replace the Control cover. Be sure that the O-Ring
seats properly in the cover groove. Do not over-tight-
en the cover screws.
5. Connect the other end of the pressure transducer
cable to the transducer. (See Figure 2).
START-UP OPERATION
(See Figure 3)
1. Pressure Central must have all lines in the system
shut off in order to calibrate itself correctly. Check all
sprinkler zones, service lines, household service, etc.,
to make sure that there are no open service lines in
the system. If you find any open lines, shut them off
before connecting the power to Pressure Central.
NOTE:
If, when the pump starts at calibration, there
are any open lines
between Pressure Central and the
transducer, Pressure Central will accelerate the pump
to full speed and keep it there, which can damage
both the motor and the pump.
2. Turn on the power to Pressure Central at the circuit
breaker box. Pressure Central will start the pump,
perform a 30-second self-check, and pressurize the
system. If the Pressure Set Point or the Motor Select
Switch have changed since the last time Pressure
Central was powered up, it will re-calibrate itself
before going to normal operation.
3. Once Pressure Central is correctly calibrated, the
pump will stop if there is no demand for water. If
there is a demand for water, the pump will continue
to run to maintain the system pressure.
NOTE:
Although the system maintains constant pressure
at the transducer, additional demands (more faucets
opened, more sprinklers on line, etc.) may cause pres-
sure drops in other places in the system. This is due to
limitations in the plumbing and will be more noticeable
the further the demand sites are from the transducer. This
is true of any system; it is not a system failure.
TPM Mode
You will see references to ‘TPM Mode’ in this manual.
‘TPM Mode’ (Temporary Performance Monitoring Mode)
is the mode the Control goes into when it senses a fault
(such as a current overload) that would damage the
Control, pump, or motor if it continued to try to run nor-
mally. In TPM Mode, the Control automatically reduces
the pump speed (and hence the load on the motor and
Control) to a point that it can sustain without damage. If
the condition causing the Control to go into TPM Mode
clears, the Control will automatically return to normal
operation.
Recalibration
Recalibration of the Control is necessary after adjusting
the Pressure Set Point or the Motor Select Switch
because the Control will not “see” the adjustment(s) until
power has been turned off and turned back on again.
Wait one minute between power down and power up to
allow the control components to discharge.
The Control will automatically run a 30-second self-
check if you disconnect it from the power supply, wait
one minute, and reconnect it. It will recalibrate itself if
the Pressure Set Point or the Motor Select Switch have
changed since the Control was last powered up.
NOTE:
Pressure Central must have all lines in the system
shut off and system pressure below the set point in order
to calibrate itself correctly (you may have to bleed off
some pressure before turning on the power). Check all
sprinkler zones, service lines, household service, etc., to
make sure that there are no open service lines in the sys-
tem. If you find any open lines, shut them off before con-
necting the power to Pressure Central. If, when the pump
A B
C
D
E
F
O 1
2
3
4
5
6
7
8 9
0
1
2
3
4
5
6
7
0
1
2
3
4 5
6
7
PRESSURE
SET POINT
PRESSURE
SET POINT
M
OTO
R
SELECT
MOTOR
SELECT
Arrowhead
Arrowhead
is factory
set at '2' (30-80 Hz)
Pressure is adjustable from
25 - 95 psi in 5 psi increments.
Switch is factory set to '8' (60 PSI)
L1
L2
Power In
Terminal
115 or 230VAC,
50/60Hz/1Ph
EGND
EGnd
Black
Yellow
Red
Pressure
Transducer
Terminal
Power Out
Terminal
(To Motor)
95 PSI
25 PSI
60 PSI
4393 0803
Auxiliary
Terminal
Run/Stop
Jumper
30-60 Hz
30-80 Hz
Figure 3: Pressure Set Point and Motor Select Settings
