Cooling Tower Heater Controllers

Contactor/Transformer Control Panel

M-Tech Control’s Contactor / Transformer cooling control panels with cover controls offer dependable control of 1-2 basin heaters per contactor (up to 3 contactors). Our standard product is available in 30 – 60-amp configurations (up to 120A non stock), and offer 24VAC and 120VAC coils. Our panels are UL508a certified and assembled using high quality components. Each M-Tech basin heater panel is backed by our 5-year limited warranty.

Each Panel can be enclosed in your choice of NEMA 4 cold rolled steel, NEMA 4X stainless steel and NEMA 4X non-metallic enclosures.

The Heater current charts may assist in selecting the proper contactor arrangement. If you are unsure of the correct sizing, we can assist in the selection.

Note on incoming power wiring:

The main incoming power wire requirements are sized based on the total heater nameplate kW and voltage. Calculate the actual load on the heater contactor control panel (the total kW of all the heaters connected to it) or use the nameplate rating in determining the wire size required.

Calculate the amperage as follows:

Single Phase Amperage = Total kW x 1000

                                                 Voltage

Three Phase Amperage = Total kW x 1000    

                                          Voltage x 1.732

The field supplied branch circuit disconnect switch and the branch circuit protective devices (fusing or circuit breaker) should be sized to carry at least 125% of the current calculated above.