Holman DIAL EZY N10372 - Manual (Page 12)

Electrical Characteristics
Power Supply
MAINS SUPPLY
This unit can run off a 50Hz external transformer,
(plugpack), with an output of 24VAC 50Hz @ 1 Amp.
Plug Pack Model
The correct wiring installation for the 24VAC plug pack is
shown on page 19. The plug pack model is only suitable
for indoor installation.
Electrical Outputs
ELECTRICAL POWER SUPPLY
l Input: 24Volts AC 50Hz.
l Electrical Outputs: Maximum of 1.0 AMP
To Solenoid Valves: 24 VAC 50/60 Hz 0.5 AMPs max.
To the Master Valve/Pump Start: 24VAC 0.25 AMPs
maximum.
Note:
Transformer and fuse capacity must be compatible with
output requirements.
l Overload protection: Standard 20mm 1 Amp fuse.
l Power failure: 9 Volt block type battery maintains
clock and programs for up to 4 weeks.
l The output circuits should be installed and protected
in accordance with wiring rules.
Installation Instructions
Pump Hook-Up Connections
Do not attempt to drive a pump starter directly from the
controller. Pump start is provided by connecting one side
of the coil of a suitable relay to the Master Valve/Pump
Start output of the controller and the other side to the
controller common.
For systems supplied with water from a pump, unused
stations must be connected back to the last used station
to eliminate the possibilty of the pump running against a
closed head. Failure to do so could lead to pump
damage.
The diagram shows an 6 station controller with 4 active
stations (valves):
PAGE 21 PAGE 20
Unused
stations must
be linked back
to the last
used station.