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ZONE THERMOSTATS
Each zone requires a zone thermostat. The following lists the types of
thermostats to use with each Digitract 4-2 system, information on Zonex
Systems thermostats and how to select a thermostat not manufactured by
Zonex Systems.
Gas/Electric DTGE4-2
– Use 24V ac single stage gas/electric thermostats.
Zonex Systems offers three models: SADIGI, 101PROG and DIGICOM.
If not using Zonex Systems thermostats, see Thermostat Compatibility
section below.
Heat pump DTHP4-2
– Use 24V ac single stage heat, single stage cool
heat pump thermostats. If emergency heat feature is preferred then the
thermostat for Stat1 must have the emergency heat mode feature. If the
heat pump has the compressor fail flag feature, STAT1 should also have
a compressor fail light. See Thermostat Compatibility section below.
Zonex Systems offers three thermostat models that can be used with the Gas/Electric Digitract 4-2 System
Controller (DTGE4). These models are SADIGI, 101PROG and DIGICOM.
SADIGI:
The SADIGI is a single stage gas/electric, hard wired (non-power robbing) thermostat. It can
control one heat, one cool and blower fan. It can run in Heat, Cool, or Auto changeover mode. Setpoint
range is from 55° to 86° Fahrenheit. The mode and setpoints are stored in nonvolatile memory so they
will be remembered even if power is interrupted. It has a bright and easy to read digital display and is
simple to operate. Up and down push buttons select the mode and setpoint(s). Under the cover of the
thermostat there are two mode status lights: one red and one green. The red light is on when the
thermostat is making a heat call. The green light is on when the thermostat is making a cool call. The
dimensions are: 2
7
⁄
8
”W x 4
1
⁄
2
”H x 1”D, the color is off white. Terminal designations are: R, C, Y, W
and G. Requires 5 conductor thermostat wire. Can be ordered with remote sensor; p/n SADIGIRS.
101PROG:
Programmable, dual setpoint, single stage heat/cool, electronic, non power robbing, auto
changeover, weekday/weekend (5,1,1) programmable, manual override capable. Thermostat includes
a large LCD that displays time, day, program, setpoints and room temperature. Can program up to four
different schedules per day. Battery backup memory. Dimensions are: 6”W x 3
1
⁄
2
”H x 1
3
⁄
4
”D. Requires
five thermostat wires for installation. Color: White. Can be ordered with remote sensor; p/n 101PROGRS.
DIGICOM/DIGIHP:
The DIGICOM and DIGIHP are auto changeover, communicating thermostats used
exclusively in ZonexCommander thermal management systems. Using a computer and the ZonexCommander
software, all thermostats in the system can be programmed and viewed. The DIGICOM/DIGIHP may
be applied in stand alone unit control, from 1 to 20 split or packaged systems. When used with a
modem, all ZonexCommander software functions can be controlled remotely. The DIGICOM/DIGIHP
requires 24V AC power from either the zone system or HVAC unit transformer, with the addition of a two
conductor, twisted pair cable for communications. Dimensions: 2-7/8” W x 4-1/2” H x 1” D.
ZONE THERMOSTATS – COMPATIBILITY
The DTGE4-2 gas/electric and DTHP4-2 heat pump controllers are compatible with most thermostats,
offering a wide thermostat selection to the installing contractor. When using other than Zonex Systems
thermostats, please refer to the following guidelines:
Electronic Thermostats:
Digital thermostats requiring 24V AC power must be “Hard wired” with a
separate R and C or common terminal. Power robbing type thermostats are not compatible. All types
of battery operated thermostats may be used with any Digitract 4-2 control system.
Mechanical Thermostats:
When using a mechanical thermostat, ensure the cooling compensator
(anticipator) is removed, and the heating anticipator is shorted or set to its lowest setting.
Please contact Factory Technical Support for additional thermostat compatibility information.
ZONE THERMOSTATS – TYPES
ZONEX SYSTEMS THERMOSTATS
DIGICOM/DIGIHP
SADIGI
