MZS4 – 24V 4 Zone All-In-One Zone Control Panel

• 24V, universal 4 Zone Panel for Heat Pumps, Dual Fuel and Conventional 4 heat/2 cool.
• Expandable up to 10 zones (Add MZA2)
• Built in DIP switches that set desired functions for type of HVAC equipment outputs and zone thermostats used.
• ZPS sensor to provide capacity control of the equipment.
• Compatible with any 4/5 wire thermostats.
• Built in LEDs indicate system status and indicators to show each zone’s call.
• Color-coded, push-in terminal blocks makes wiring simple and fast.
• Used with RDS, RTS, ZDS, ZDB Dampers

The MasterZone Control Panel is the only panel needed to provide multiple zone control of any forced air heating and cooling system. The MZS4 panel is compatible with any type of thermostat and controls up to 3 stages of heating and cooling as well as heat pumps. It is expandable up to ten (10) zones by adding the MZA ZONE-ADDER panels. Built-in LEDs provide continuous system operation readout and color coded screw less terminal blocks provide easy wiring. Standard single stage thermostats can be used to control two-stage and heat pump systems. Built-in second stage time or the number of zones calling brings on the second stage and the ZPS sensor provides capacity protection control for the HVAC Unit. The MZ panels have a built-in self resetting fuse to protect the transformer. Other features are zone indicator lights, adjustable heating high limit temperature for ZPS sensor, override button for time delay and a re-boot button for quick re-start.

The MZ panels operate the HVAC Unit based on a first call from any zone. Once a zone is calling for a particular mode, the MZ panels will not allow an opposite call for a maximum period of 20 minutes or possibly less based upon the time the unit was running in that mode when the opposite call was made. This “Intelligent Changeover Feature” is a unique  feature of the MZ panels.

Product Documentation

• MZS4 Installation & Operating Instructions
• MZ2A Installation & Operating Instructions
BPE - Installation & Operating Instructions(for products w/ "B" in Model #)

We ship products within 24-72 hours depending on order size and details.

For UPS Next Day shipping: Please call us to place your order.

FIVE (5) YEAR LIMITED WARRANTY on all 24V. Dampers and Controls and Bliss IOZ Systems ZONEFIRST warrants its products to be free of defects and to provide trouble-free operation for a period of Five (5) years from the date of installation. The warranty is limited to the cost of the product and does not include claims for labor or consequential damage. Prior authorization must be obtained from ZONEFIRST before returning any product. Products returned under warranty and found to be defective will be replaced or credited. Items returned within the warranty period that are found not to be defective and those items that are out of warranty are subject to a minimum repair or inspection fee. All returns must be sent freight prepaid with the return authorization number clearly marked on the packing slip. Returns without prior authorization will be refused. All items damaged in freight cannot be returned, and a claim must be made with the freight carrier.

LIFETIME Limited Warranty on Plug-in-Play™ Dampers and their respective Zone Panels. The warranty requires the return of the product for inspection before the credit for the replacement is issued.

RETURNS: All returns must have prior authorization and are subject to a 25% re-stocking charge. Custom and Special order items may not be returned for credit. Returns are for credit only and can only be used towards future purchases. Shipping fees are non-refundable.

The Returns process can be started here.