iWorx® SMZ1
505-048-2, Effective: March 10, 2015
15
© 2015 Taco Electronic Solutions, Inc.
Group 1 Circulator (G1C)
The Group 1 Circulator output must be connected to a 24 VAC pilot relay if the load is greater than 1 Amp. See preced-
ing figures for details. If the load is less than 1 Amp, connect it to G1C (T28) and TC34 (T27).
Group 2 Circulator (G2C)
The Group 2 Circulator output must be connected to a 24 VAC pilot relay if the load is greater than 1 Amp. See preced-
ing figures for details. If the load is less than 1 Amp, connect it to G2C (T26) and TC34 (T27).
Zone 1 Out (Z1)
The Zone 1 output must be connected to a 24 VAC pilot relay if the load is greater than 1 Amp. See preceding figures
for details. If the load is less than 1 Amp, connect it to Z1 (T25) and TC56 (T24).
Zone 2 Out (Z2)
The Zone 2 output must be connected to a 24 VAC pilot relay if the load is greater than 1 Amp. See preceding figures
for details. If the load is less than 1 Amp, connect it to Z2 (T23) and TC56 (T24).
Zone 3 Out (Z3)
The Zone 3 output must be connected to a 24 VAC pilot relay if the load is greater than 1 Amp. See preceding figures
for details. If the load is less than 1 Amp, connect it to Z3 (T22) and TC78 (T21).
Zone 4 Out (Z4)
The Zone 4 output must be connected to a 24 VAC pilot relay if the load is greater than 1 Amp. See preceding figures
for details. If the load is less than 1 Amp, connect it to Z4 (T20) and TC78 (T21).
SMLT Heater (SH)
This output is used to regulate the temperature of the heating element in a five-wire SMLT sensor. Connect the Red
wire from that sensor to SH (T3). The sensor's black ground wire should already be connected to COM.
Other Connections
Network (LON)
Network wiring must be twisted pair. One network wire must be connected to terminal NETA (T1) and the other network
wire must be connected to terminal NETB (T2). Polarity is not an issue since an FTT-10A network is used for commu-
nications.
Power (PWR)
Connect one output wire from a 24 VAC power supply to PWR (T39) and the other output wire from the power supply to
the adjacent common terminal (T38). T38 must be connected to earth ground.
Ground (GND)
Terminal GND
(T40) must be connected to earth ground. Failure to properly ground this equipment will
result in improper operation. Improper grounding may also increase the risk of electrical shock, and may
increase the possibility of interference with radio and TV reception.
SPECIFICATIONS
Electrical
Inputs
• Cabling: twisted shielded pair, 18
AWG
recommended—500
feet max. (152
meters)
• Resolution: 10
bit
ZoneSlab 1/2/3/4 Temperature
• Precon Type III 10K thermistor
