Cleaning the Strainer Basket

Procedure

Preparation

1. Disable the call for heat by lowering the temperature setpoint on the temperature controller to a value several degrees below the sensed temperature (in the future, a switch may be added to do this).
2. If the boiler was operating in Step #1, wait for the boiler circulation pump to stop. This may take several minutes. Observe that during this period, the manifold temperature will drop, approaching the boiler inlet (sensed) temperature. It is important to allow the boiler to complete a proper cool-down prior to cutting water circulation.
3. Stop the main pump motor. Switching off the disconnect (the lever on the enclosure above the motor starter) may be necessary in some cases (see below).
4. Close the water valves on both sides of the strainer basket. If water overflows, additional closing force may be required (the valves should form a complete seal).

NOTE: Prior instructions included disabling the chlorinator and acid pump. This is not necessary; the flow meter on the Chemtrol automatically disables all chemical feeds when the pump is stopped.

Cleaning

1. Loosen the six screws on the strainer lid.
2. Remove the strainer lid.
3. Remove the strainer basket.
4. Inspect and clean the basket. Discard the contents into a garbage bag.
5. In some cases, debris may pass through the strainer and clog the pump. Non-typical noise, vibration and/or reduced flow (despite cleaning/backwash) may be indicative of a clogged pump. If this is determined to be the case, ensure that the main pump motor disconnect is switched to the off position. A lock-out procedure may be required. Once the motor is safely disabled, reach into the pump and clear of all debris.

Wrap-Up

1. Return the strainer basket to the base. The taller side of the basket must be on the right (pump) side.
2. Re-install the strainer lid. Hand-tighten the six screws.
3. Open the water valves on both sides of the strainer basket.
4. Hand tighten the six screws again, as needed.
5. Start the pump.
6. Open the air bleed valve above the Boiler Low Water Cutoff next to the boiler. If tripped, reset.

Controlling the Pump

• To start or stop the pump, press the black START or red STOP button on the Pump Motor Starter.