Timers
Timers controlling pool equipment are necessary to manage energy usage and control that equipment operates in the correct sequence. Typically pump, cleaners, SWGs, heaters, and lights may be controlled by internal timers or external timers. Pool Automation Controllers can provide the timing and control of most pool equipment. Where equipment does not have an internal timer, or connected to automation, then an external timer is used.
Intermatic[1] external timers are often used in pools and spas.
The Intermatic T100 Series of timers are mechanical with a 24 hour yellow dial that uses moveable trippers to set multiple ON and OFF times.
Key differences in the T100 Series models are:
- Clock motor voltage
- Switch type
- Single Pole single Throw - SPST
- Double Pole Single Throw - DPST
- One Normally Open, One normally Closed Contacts - NONC
- Case type
- Metal
- Plastic
Popular Intermatic models are:
- T101 - SPST with 120V clock motor
- T103 - DPDT with 120V clock motor
- T104 - DPDT with 240V clock motor
- T106 - NONC with 240V clock motor
SPST timer can switch a single 120V hot line DPDT timer can switch two independent 120V hot line or the two hot lines for a single 240V device
.
