Intermatic T101P201 24 hour 120V mechanical time switch in a Type 3R plastic enclosureIntermatic 24-Hour 120V Mechanical Time Switch, SPST, Pool Heater Protection, Type 3R Plastic Enclosure, T101P201 In stock$18143 Web Price
Intermatic T101P201 24 hour 120V mechanical time switch in a Type 3R plastic enclosure
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Intermatic 24-Hour 120V Mechanical Time Switch, SPST, Pool Heater Protection, Type 3R Plastic Enclosure, T101P201

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Quick overview

  • Heater protection timing It turns a gas fired heater off about 20 minutes before the filter pump shuts down.
  • Stops the pounding Cutting the heater early clears the residual heat instead of trapping it in the exchanger.
  • Less scale Running the pump on after the burner stops reduces scale and lime deposits in the heater.
  • 24 hour dial Up to 12 ON and OFF operations a day, with a one hour minimum between them.
  • SPST at 120V Single pole single throw switching, clock supply 120 VAC at 60 Hz.
  • Type 3R plastic enclosure A rainproof outdoor enclosure for the equipment pad.
Full description and specifications ↓

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Product details

The Intermatic T101P201 is a 24 hour mechanical time switch in a Type 3R plastic enclosure, wired for pool heater protection. The clock runs on 120 volts at 60 Hz and the switch is SPST.

What heater protection means

A gas fired heater keeps heat in the exchanger after the burner stops. If the filter pump shuts down at the same moment, that heat has nowhere to go. The result is the pounding and knocking owners hear at the pad, plus accelerated scale and lime deposits inside the heater. This time switch is built to turn the heater off approximately 20 minutes ahead of the pump, so the pump goes on moving water and carries the residual heat away. It is a small piece of sequencing that adds years to a heater.

Duty and ratings

These are heavy duty mechanical time switches with high motor load ratings, used on commercial, industrial and residential jobs. The dial supports up to 12 ON and OFF operations a day with a minimum of one hour between them. Beyond swimming pool and spa filter pumps with gas fired heaters, Intermatic lists the family for booster pumps, lighting, hydro chlorinators, fans, air conditioning, heat pumps and music and signal systems.

Mounting

The Type 3R plastic enclosure is rated for outdoor use, so it can go on the equipment pad. Plastic also avoids the corrosion that eats metal enclosures near salt systems and chemical storage.

Specifications
Brand Intermatic
Manufacturer part number T101P201
UPC 078275700574
Type 24-hour mechanical time switch
Function Heater Protection
Switch SPST
Clock supply 120 VAC 60 Hz
Enclosure Type 3R plastic
Operations Up to 12 ON/OFF operations each day, minimum ON/OFF time of 1 hour
Heater delay Turns the heater off approximately 20 minutes before the filter pump
Shipping weight 3.42 lb
Ships Parcel

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Questions and answers

What people ask about this product, answered by our pool techs.

What makes this different from a standard pool timer?
The heater protection function. It is set to turn a gas fired heater off roughly 20 minutes before the filter pump stops, so the pump keeps carrying heat away after the burner shuts down.
Why does that matter?
Heat left in the exchanger with no flow causes pounding and knocking, drives scale and lime deposits, and shortens the life of the heater. Running the pump on afterwards clears it.
What voltage and switch type is it?
The clock runs on 120 VAC at 60 Hz and the switch is SPST.
Can it be mounted outside?
Yes. It comes in a Type 3R plastic enclosure, which is the rainproof outdoor rating.
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