HEATIZON SYSTEMS M329, Instructions

HEATIZON TWELVE-CHANNEL SELECTOR BOX 

Part No. M329 

Read these instructions in their entirety before attempting to install Heatizon

Systems M329 

Twelve-Channel Selector Box (“Selector Box”).

 
FEATURES 

The Heatizon M329 is designed to operate up to twelve Heatizon Control Units, including CBX6 
Series, CBX23 Series, CBX7 Series, SLC500 Series, and Radiant 8 Series.  The Selector Box 
protects the master breaker by staggering the start of each Control Unit.  In addition, it provides 
manual operation of one or more Control Units, delivers 24VAC for activation device power, and 
allows up to twelve Control Units  to be activated by one activation device.   The Selector Box 
may also be used with many different activation devices and the Heatizon Relay Panel 
(Heatizon Part No. M330). 

 
SET UP 

Remove Board. 

Carefully remove the M329 Selector Box’s green board prior to 

mounting the M329 Selector Box enclosure. 

Mount.  

Attach the M329 Selector Box on studs or other adequate surfaces using the 

four (4) holes in the back of the Selector Box enclosure and anchoring devices designed 
to accept shear loads and lateral loading of 15 lbs. 
 

Knockouts.  

Drill knockouts for the 115 VAC Power, Activator Device wire, and Control 

Unit connecting wires. 

Install Board. 

 Using the provided screws, carefully reinstall the M329 Selector Box 

green board into the enclosure. 

CONNECTIONS 

Electrical Connection. 

Connect the 115VAC power for the M329 Selector Box to the 

connection terminal labeled J1 located in the lower left hand portion of the M329 Selector 
Box green board. 

Connection labels have the following meanings: 

H = Hot 
N = Neutral 
G = Ground