Connecting The Tco - Hayward HeatPro® Owner's Manual

Time Clock Override (TCO) Function
Purpose:
This function provides another way to maintain pool temperature. Most pool systems use a time clock to
control the pool's filter pump. The time clock may have the filter pump off for several hours at a time. Since
the filter pump must be flowing water through the heat pump for heating of the water to occur, the Time
Clock Override (TCO) function allows a user to control the pool filter pump by temporarily bypassing the
time clock.
The TCO function is designed to automatically turn the pump on after 2 hours of "off-time". It will run the
pump for 10 minutes while the heat pump thermostat monitors the pool temperature. If there is more than a
2-degree difference between the thermostat setpoint and the actual pool temperature, the heat pump will
energize and continue to run until the setpoint is satisfied. The TCO will then disengage and allow the time
clock to control the filter pump. If the time clock doesn't start the filter pump within 2 hours, the TCO will
begin this cycle again.
Wiring the TCO Function:
1) Refer to the wiring diagrams located on the next page.
2) Wire the pool filter pump power in parallel using the TCO contactor located in the heat pump control
box.
3) Wiring shall comply with the 1996 National Electrical Code and all state and local requirements of the
Authority Having Jurisdiction.
4)
Maximum Load: 25 FLA at Volts: 240,1 ph.
Note to electrician / installer:
Use the TCO override feature described below to test for correct installation of the TCO function wiring.
TCO Override:
A user may temporarily override the TCO. An example would be that you want to use your pool between
9:00 and 10:00 pm. The heat pump control may be programmed to energize the filter pump, which will
engage the heat pump to maintain the pool temperature. In other words, you can force the heat pump and
filter pump to work on demand. This is a temporary measure that can be initiated in 30-minute increments,
for a period up to 3 hours.
Programming Instructions for TCO Override:
1. Push and hold up and down buttons simultaneously – Display will read "P0.0"
2. Release buttons.
3.
Push up button – display reads P0.5
Note: Each time the up Arrow engages, the display will increase in ".5" increments. Each
increment equals 30 minutes, 3 hours (P3.0) is the maximum.
4.
Push down button to decrease the temporary override time. Continue decreasing the time until
reaching P0.0 to turn the override off.
Heat Pump Pool / Spa Heater Owner's Manual
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