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Overview
The Smart Temp 4 Zone expander board adds to the capability of the Smart Zone 4
Main PCB. This expander board adds an additional 4 zones to the system as well as
provide additional energy savings by offering the ability to use roof or outside air to
assist heating and cooling. The SZ-4/E does this by comparing return air temperature
with outside air and roof temperature and opening a damper to draw in the best air
for the function called.
The SZ-4/E board is a microprocessor based zone control system that when connected
to a standard thermostat (one fitted in each zone) will control a heating cooling or air
conditioning system and up to 5 zone dampers. 1 damper output for each for the 4
zones plus a bi-pass or spill damper. The SZ-4 (main board controls the equipment. The
SZ-4E passes the zone calls to the main board for equipment calls)
As each zone is controlled by a standard wall thermostat you can select a thermostat
type that best suits the users’ requirements. In this way, the zoning system can be as
simple or as powerful as the user demands.
There has been NO user manual supplied for this product as there are no user
selectable parameters and if installed correctly this boards operation should seem
transparent to the user.
Installing
Please Note, the SZ-4/E zone board only accepts Heat, Cool, Fan inputs from
thermostats only. Heat Pump type thermostats are NOT suitable. (A heat pump
thermostat calls a compressor for heating and
cooling and the reversing valve to
determine heating or cooling mode)
To make the Smart Zone 4 board as simple as possible a standard HEAT / COOL
thermostat should be used (Y terminal ONLY for cooling & W terminal only for
heating).
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