Leisure Temp LT1000, Operation Manual

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PLEASE NOTE -
If minimum flow rates are not met, heat pump performance is reduced and performance will
suffer. Internal safety devices may deactivate the heat pump with the following errors:
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HIGH PRESSURE FAULT
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HP5 SYSTEM LOCKOUT
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LOW PRESSURE FAULT
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LP5 SYSTEM LOCKOUT
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Operate water filtration devices per manufacturer's specifications. Dirty filters can cause a reduction of water flow
to the heat pump. An increase of 7-10 psi (48 to 69 kPa) higher than the clean filter pressure typically reduces
flow rates. This requires the filter to be cleaned or back-washed.
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Keep baskets free of debris. A large quantity of debris in the pump and skimmer baskets can reduce water flow.
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Check for improper valve settings. A partially closed valve after the filter, or a full-open bypass around the heat
pump, will cause insufficient water flow through the heat pump.
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The maximum static pressure (or operating pressure) is 50 psi (345 kPa). These specifications relate to the heat
pump only.
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Code-specified whole system turnover rates must be satisfied.
2.6 Adjusting Water Flow Using ΔT (Delta-T)
The Delta-T is the temperature difference between the water temperatures entering and leaving the heat pump.
The equipment can be fine-tuned for maximum performance by balancing water flow rates to maintain an
ideal ∆T.
The adjustment procedure must be completed with the unit in heating mode.
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Installed temperature ports are required to perform the following procedures.
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These ports are typically located on the pool in and pool out water lines approximately six inches away from the
heat pump.
PLEASE NOTE -
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The installation of temperature ports is required for all commercial applications.
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The installation of temperature ports is strongly recommended for residential installations.
Temperature Port
(Shown with Probe)
1. Adjust the thermostat to its lowest setting with the unit in
heating mode.
2. Deactivate the water filtration pump.
3. Confirm that the filters leading to the heat pump are clean.
4. Adjust the valves controlling water headed towards the heat
pump to the half-open position.
5. Adjust the valves controlling water leading away from the
heat pump to a fully open position.
6. Activate the pool water filtration pump.
7. Slowly raise the thermostat temperature until the heat pump
activates.
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After a four-minute delay, the heat pump's compressor will start.
8. With the heat pump running, confirm the filtration pump is operating properly with adequate flow and no short
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