Programming instructions

Designer’s Guide 11
Calsense
• 24 VAC output for use with pump start relay
• Electrical surge protection
Electrical Hook-up
Perform all 120 VAC electrical and grounding hook-up per local and National Electric Code.
Enclose the 120 VAC power line in conduit approved for grounding and connect securely to the
transformer nipple. The conduit should be grounded, as it will serve as the controller’s ground.
Terminal strips for wiring controller station wires to field wires are highly recommended. For information
about the Calsense Transient Protection Board (model TP-1) and proper grounding, see Transient
Protection and Grounding on page 15.
The transformer can supply enough power to operate six 0.25 amp (A) solenoids. If a master valve or
pump start relay is used, the transformer can operate five 0.25A solenoids. If additional power is
necessary for master valves or pump relays which draw too much amperage, an auxiliary transformer
relay assembly may be built (Figure 2
).
Figure 2 - Auxiliary Transformer Relay Assembly