132
UNT-IOM-6
For Reference Only:
This schematic shows typical wiring of a fan-coil. It is not intended for a basis of design or for equipment installation
purposes in the field. For an as-built schematic specific to a particular unit, please see the ship-with schematic for that
specific unit or contact your local Trane representative.
Four-pipe
Two-position N/C cooling control valve
Two-position N/O heating control valve
Two-position N/C fresh air damper actuator
Condensate overflow detection
Low temperature detection
Unit mounted fan mode switch,
Wall mounted setpoint dial and zone temperature sensor
Unit mounted disconnect switch
NOTES:
1. UNLESS OTHERWISE NOTED, ALL
SWITCHES ARE SHOWN AT 25 C (77 F),
AT ATMOSPHERIC PRESSURE, AT 50%
RELATIVE HUMIDITY, WITH ALL UTILITIES
TURNED OFF, AND AFTER A NORMAL
SHUTDOWN HAS OCCURRED.
2. DASHED LINES INDICATE
RECOMMENDED FIELD WIRING BY
OTHERS. DASHED LINE ENCLOSURES
AND/OR DASHED DEVICE OUTLINES
INDICATE COMPONENTS PROVIDED BY
THE FIELD. SOLID LINES INDICATE
WIRING BY TRANE CO.
3. NUMBERS ALONG THE RIGHT SIDE OF
THE SCHEMATIC DESIGNATE THE
LOCATION OF CONTACTS BY LINE
NUMBER. AN UNDERLINED NUMBER
INDICATES A NORMALLY CLOSED
CONTACT.
4. ALL FIELD WIRING MUST BE IN
ACCORDANCE WITH THE NATIONAL
ELECTRIC CODE (NEC), STATE AND
LOCAL REQUIREMENTS.
LEGEND
DEVICE
LINE
DESIG.
DESCRIPTION
NUMBER
1K1-3
FAN STARTERS
25-26-27
1T1
TRANSFORMER
21
1TB6
TERMINAL STRIP
1U1
THERMOSTAT MODULE
23
358
CONDENSATE OVERFLOW
36
151
DISCONNECT SW
3
159
LOWLIMIT
2U2
ZONE SENSOR MODULE
24
FAN SWITCH
28
481
FAN MOTOR
9
2L2
DAMPER ACTUATOR
32
3L1
MAIN COIL VALVE
28
3L3
HEATING COIL VALVE
30
DEVICE PREFIX
LOCATION GUIDE
AREA
LOCATION
1
CONTROL PANEL
2
CONTROL END
3
PIPING END
4
FAN SECTION
5
COIL SECTION
6
CUSTOMER
Tracer
®
ZN.010 Typical Wiring Diagram