OMM TGZ-1 TGZ 040A through TGZ 190A 27
Expansion I/O Controller
Table 13, Digital Outputs
The following parameters are digital outputs from this controller.
Types: C1 = Refrigerant Circuit #1, C2 = Refrigerant Circuit #2, & UT = Unit
# Description Type Output Off Output On
1 Evap Water Pump Output #2 UT Pump Off Pump On
2 Cond Water Pump Output #2 UT Pump Off Pump On
3 Condenser Fan #9 C1 Fan OFF Fan ON
4 Condenser Fan #10 C2 Fan OFF Fan ON
Table 14, Analog Inputs
The following parameters are digital outputs from this controller.
Types: C1 = Refrigerant Circuit #1, C2 = Refrigerant Circuit #2, & UT = Unit
# Description Type Output Off Output On
1 Entering Evaporator Water Temperature UT
NTC Thermister
(10k@25°C)
-58 to 212°F
2 Demand Limit UT 4-20 mA Current 0-100 % Load
3 Liquid Line Temperature #1 C1
NTC Thermister
(10k@25°C)
-58 to 212°F
4 Liquid Line Temperature #2 C2
NTC Thermister
(10k@25°C)
-58 to 212°F
Setpoints
The following parameters are remembered during power off, are factory set to the Default value,
and can be adjusted to any value in the Range column.
The PW (password) column indicates the password level that must be active in order to change the
setpoint. Passwords are as follows:
O = Operator [0100] M = Manager [2001]
Table 15, Setpoints
Description Default Range PW
Unit Enable Off Off, On O
*Unit Mode Cool
Cool, Cool w/Glycol, Heat
Test
O
Control source Switches Keypad, Network, Switches O
*Available Modes
(R134a)
Cool
Cool, Cool w/Glycol, Heat, Test
Cool/Heat, Cool/Heatw/Glycol,
Heatw/Glycol
M
Evap LWT 44. 0 °F
40.0 to 60.0 °F, No Glycol
20.0 to 60.0, With Glycol:°
O
Heat LWT 110.0°F 110.0 to 165.0°F
Evap LWT sensor offset 0.0 ± 5.0 degrees F O
Cond LWT sensor offset 0.0 ± 5.0 degrees F O
Evap EWT sensor offset 0.0 ± 5.0 degrees F O
Cond EWT sensor offset 0.0 ± 5.0 degrees F O
Evap Delta T 10.0 °F 6.0 to 16.0 °F O
Cond Delta T O
Startup Delta T 10.0 °F 1.0 to 15.0 °F O
Stop Delta T 0.5 °F 0 to 3.0 °F O
Max Pulldown Rate 1.0 °F 0.5 to 5.0 °F M
Max Rate (R134a) 1.0 ºF 0.5 to 5.0 ºF M
Evap Recirculate Timer 30 15 to 300 seconds M
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