User Guide for Taco 0034ePlus-F2 Circulator Pump

Quick guide from the manual

The Taco 0034ePlus-F2 is a high-efficiency, wet-rotor circulator pump designed for hydronic heating, chilled water cooling, and domestic hot water systems. Before installation, ensure the system is filled with water or a maximum 50% water/glycol solution. The pump must be mounted with the motor in a horizontal position. Wiring requires a flexible conduit and connection to a properly grounded receptacle. The pump features five operating modes, which can be selected via the digital keypad.

Product description

The 0034ePlus is a variable speed circulator with an ECM permanent magnet motor and an advanced digital LED display. It is designed to replace single-speed and 3-speed circulators in its class, offering up to 85% power reduction compared to standard AC permanent split capacitor circulators. It includes features like the BIO Barrier to protect against contaminants and SureStart for automatic unblocking.

Installation

The circulator can be installed on either the supply or return side of the boiler, but it should always pump away from the expansion tank. Use the provided O-ring gaskets; do not use flat rubber gaskets. If installing at elevations over 5000 feet, a higher fill pressure of 20 psi minimum is required to prevent cavitation. Always add vibration dampeners to piping when mounting to wall or floor joists to reduce noise transmission.

Wiring

Disconnect AC power supply before wiring. Remove the terminal box cover and insert a wiring connector into the knockout hole. Use flexible conduit only. Connect the Line/Hot power to the L terminal, Neutral to the N terminal, and Ground to the G terminal. The green terminal plug can be removed to simplify wiring. Ensure the rubber cap plug is inserted to cover any unused knockout holes.

Operating modes

The pump features five operating modes, indicated by different LED colors:

• activeADAPT (Violet LED): Automatic, self-adjusting proportional pressure.
• Constant Pressure (Orange LED): Maintains constant pressure across 5 curve settings.
• Proportional Pressure (Green LED): Varies speed to maintain proportional pressure across 5 curve settings.
• Fixed Speed (Blue LED): Variable fixed speed settings from 1% to 100%.
• 0-10V DC (Yellow LED): Analog external input or PWM pulse width modulation from a building control system.

To change modes, press the SET button for 2 seconds until the LED flashes, use the UP/DOWN buttons to select the mode, and press SET again to confirm.

Troubleshooting and maintenance

If the pump is noisy, check for insufficient suction pressure (cavitation) or foreign bodies in the impeller. If the pump is not running, verify power supply, check for tripped circuit breakers, or ensure the rotor is not blocked. A red LED indicates a locked or sticking rotor. To unlock, disconnect power, close isolating valves, remove the motor from the casing, and clean the impeller. If the pump still does not run, it may need replacement.