Troubleshooting - Johnson Controls T2000 series Installation Instructions

System:
HEAT-OFF-COOL
Fan:
HIGH-MED-LOW
1 2 3 4 5
HIGH
MED
LOW
9 7
8 6
Figure 4: Wiring the T2000ACx-0C0 for
Heating/Cooling Only: 4-Pipe System
with 3-Speed Fan Control
Model T2000ECx-0C0
Wiring terminal designations appear in Table 2 Wiring
connections for typical T2000ECx applications appear
in Figure 5 and Figure 6.
Table 2: T2000ECx-0C0 Wiring Terminals
Model T2000-ECx-0C0
Terminal Number
3
4
5
6
7
8
COOL
HEAT
(C) (H)
Valve Valve
H
M
L
24 VAC
All Wiring to be
Supplied by Installers
Connection
Heating Valve Common
High Fan Speed
Cooling Valve Common
Low Fan Speed
Medium Fan Speed
24 VAC Power
T2000 Series Low Voltage Fan Coil Thermostats Installation Instructions
System: ON-OFF
Fan:
HIGH-MED-LOW
3 4 5
HIGH
MED
LOW
8 7 6
Figure 5: Wiring the T2000ECx-0C0 for Cooling
Only: 2-Pipe System with 3-Speed Fan Control
System: ON-OFF
Fan:
HIGH-MED-LOW
3 4 5
Winter
Summer
HIGH
MED
LOW
8 7 6
Figure 6: Wiring the T2000ECx-0C0 for
Heating/Cooling Only: 2-Pipe System with 3-Speed
Fan Control and Automatic Changeover

Troubleshooting

For the ACx thermostat to function properly, the
Heat-Off-Cool switch must be fully in the desired
position. For the ECx thermostat to function, the
ON/OFF switch must be fully in the ON position.
Repairs and Replacement
Do not attempt to repair the T2000 Series thermostat.
In case of an improperly functioning control, contact
the nearest Johnson Controls® representative, and
specify the desired product code number. When
contacting the supplier for a replacement please state
the type/model number of the control located on the
data plate or cover label.
COOL (C)
Valve
H
M
L
24 VAC
All Wiring to be
Supplied by Installers
HEAT (H)/
COOL (C)
Valve
Strap-on
Thermostat
H
M
L
24 VAC
All Wiring to be
Supplied by Installers
3