HEATIZON SYSTEMS M329, Instructions

2

Activation Connection. 

Connect the wires from the Activation Device to the plug-in wire 

connector identified as J2 and located in the lower right hand portion of the M329 Selector 
Box green board. Note: Connect the activation device to pins 1 and 2 (the upper two plug 
in wire connectors of J2). Connect all activation devices that require 24 volt power to pins 
3 and 4 (the lower two plug in wire connectors of J2). Note: Activation devices requiring 
other than 24-volt power must be powered by sources other than the M329 Selector Box. 

Control Unit Connection. 

Connect the Thermostat connections from each Heatizon 

Control Unit to the M329 Selector Box by using the plug in wire connectors labeled J3, J4, 
and J5 using #18 Gauge Thermostat wire. Note: Up to a total of twelve (12) Heatizon 
Systems CBX, SLC or Radiant 8 Series Control Units may be connected to one M329 
Selector Box. Wire each Control Unit to a M329 Selector Box zone by connecting the 
following: 

Green Wire to BL 
Red Wire to R 
White Wire to W 

 
To activate the Heatizon Relay Panel (Heatizon Part No. M330) from a Heatizon 
Selector Box (Heatizon Part No. M329), connect input terminal numbers 16 (white) and 
17 (red) to the Zone 12 red and white terminals on the Heatizon Selector Box.  Be sure 
to observe polarity red on the M330 to Zone 12 red on the M329 and white on the M330 
to white Zone 12 on the M329. 
 

OPERATION 

On/Off Switch. 

The on/off switch for the M329 Selector Box is labeled S13. 

Time Delay. 

The M329 Selector Box allows you to determine the amount of time that the 

Control Unit(s) will stay on after the activation device has sent a turn off signal. S14 is a 
time delay switch that will keep the Control Units on for 0, 1, 2, or 4 hours after the 
Activation Device turns off. Set the Time Delay Switch S14 for the desired delay time. Note: 
Any time more than one switch is in the on position, the shorter delay will prevail. 
 

Position 1 On, all others Off = no delay 

Position 2 On, all others Off = 1 hour delay 

Position 3 On, all others Off = 2 hour delay 

Position 4 On, all others Off = 4 hour delay 

 
When the D14 LED is blinking the activation device is off and the time delay is running. 
 

Zone Switches. 

The Zone Switches marked S1 through S12 allow each Control Unit to be 

in “manual,” “automatic,” or “off” mode. Zone Switches that do not have a Control Unit 
connected to them must always be set in the “off” position. The Zone Switches that do 
have a Control Unit connected to them may be set in the “off”(center), “manual”(right), or 
“auto” (left) positions. Switching one of the Zone Switches that has a Control Unit 
connected to it to the “manual” position will turn on that Control Unit only, and it will stay on 
until the zone switch is moved to the “auto” or “off” position. 
 

Manual Turn on with a Timer.

 The Manual Turn On allows one or more zones to be 

manually operated for a specific period of time before automatically shutting off. Select the 
desired time to operate manually by setting Time Delay Switch S14 to 1 hour, 2 hour, or 4 
hour position. Then, select the zones you want to operate in manual mode for that period