Manualshelf

Catalogue

ManualsBrandsTrane ManualsFan CoilsTrane Uni Fan Coil and Force-Flo
51525354555657585960
52 UNT-PRC001-EN
Controls
End Device Options
All end device options are factory-installed and -tested.
Two-Position Control Valves, Model Number Digits 27 and 28 = A - H
Two-position valve options are available with either Tracer ZN010, ZN510, ZN520 or UC400. Valves
are spring-return type, sweat connections, and available as normally open or closed. The valves
respond to a 24 V signal and have 1/2-inch sweat connections. The two-way valve option will either
fully open or close. The three-way valve option allows either full water flow through the coil or
diverts waterflow through the bypass. If the control valve loses power, the valve returns to its de-
energized position. All control valve options are factory installed in the leaving water piping
downstream of the hydronic coil. The valve actuator is easily removable for service without
removing the valve body from piping.
Modulating Control Valves (Tracer ZN520 and UC400), Model Number Digits 27
and 28 = J - R
These 1/2-inch sweat connect valves are three-wire floating point valves, equal percentage type.
Modulating valves are available in four Cv sizes: 0.7, 1.5, 2.5, and 4.0. The valve responds to a 24 V
triac signal from the controller, which determines the valve position by a control algorithm. If the
valve loses power, it remains in the position that it was in when the power loss occurred. All control
valves are factory installed in the leaving water piping downstream of the hydronic coil.
Field-Supplied Valves, Model Number Digits 27 and 28 = X, Y, or 1
This option allows the controller to be factory-configured for the normal position of the field-
supplied valve, as well as running a wiring harness from the control box to the piping side of the
unit. When the field supplied valve option is chosen, the control box is provided with low voltage
components and wired back to a terminal strip (CSTI) or controller.
Note: The Trane Company does not recommend wild coil applications.
Figure 21. Control valve
End Device Options
UNT-PRC001-EN.book Page 52 Tuesday, May 8, 2012 10:54 AM