Trane 3518-7065 Installation Instructions

Auto Changeover
3518-7065
2 or 4 Pipe
Fan Coil Thermostat, 3 Speed
• 2-pipe systems
• 4-pipe systems
• Pipe sensor compatible
• Configurable
• Large display with backlight
• Selectable Fahrenheit or Celsius
• Relay outputs (minimum voltage drop in
thermostat)
• Remote sensor compatible
Installation Guide
SAFETY WARNING
Only qualified personnel should install and service the equipment. The installation, starting
up, and servicing of heating, ventilating, and air-conditioning equipment can be hazardous
and requires specific knowledge and training. Improperly installed, adjusted or altered
equipment by an unqualified person could result in death or serious injury. When workin9
on the equipment, observe all precautions in the literature and on the tags, stickers, and
labels that are attached to the equipment.
AUGUST 2020 ACC-SVN224B-EN
©2020 TRANE
• This thermostat is for 18-30 VAC applications only; do not use on voltages over 30 VAC
• Use this thermostat only as described in this manual

Warnings, Cautions, and Notices

Read this manual thoroughly before operating or servicing this unit. Safety advisories
appear throughout this manual as required. Your personal safety and the proper operation
of this machine depend upon the strict observance of these precautions.
The two types of advisories are defined as follows:
Indicates a potentially hazardous situation which, if not
WARNING
avoided, could result in death or serious injury.
Indicates a situation that could result in equipment or
NOTICE
property-damage only accidents.

Important Environmental Concerns

Scientific research has shown that certain man-made chemicals can affect the earth's
naturally occurring stratospheric ozone layer when released to the atmosphere. In
particular, several of the identified chemicals that may affect the ozone layer are
refrigerants that contain Chlorine, Fluorine and Carbon (CFCs) and those containing
Hydrogen, Chlorine, Fluorine and Carbon (HCFCs). Not all refrigerants containing these
compounds have the same potential impact to the environment. Trane advocates the
responsible handling of all refrigerants-including industry replacements for CFCs such as
HCFCs and HFCs.

Important Responsible Refrigerant Practices

Trane believes that responsible refrigerant practices are important to the environment, our
customers, and the air conditioning industry. All technicians who handle refrigerants must
be certified according to local rules. For the USA, the Federal Clean Air Act (Section 608)
sets forth the requirements for handling, reclaiming, recovering and recycling of certain
refrigerants and the equipment that is used in these service procedures. In addition, some
states or municipalities may have additional requirements that must also be adhered to for
responsible management of refrigerants. Know the applicable laws and follow them.
18-30 VAC
Proper Field Wiring and Grounding Required!
Hardwired
Failure to follow code could result in death or serious injury. All field wiring MUST be performed by qualified
personnel. Improperly installed and grounded field wiring poses FIRE and ELECTROCUTION hazards. To avoid
these hazards, you MUST follow requirements for field wiring installation and grounding as described in NEC
and your local/state electrical codes.
Personal Protective Equipment Required!
Installing/servicing this unit could result in exposure to electrical, mechanical and chemical hazards. Before
installing/servicing this unit, technicians MUST put on all Personal Protective Equipment (PPE) recommended
for the work being undertaken. ALWAYS refer to appropriate MSDS sheets and OSHA guidelines for proper PPE.
When working with or around hazardous chemicals, ALWAYS refer to the appropriate MSDS sheets and OSHA
guidelines for information on allowable personal exposure levels, proper respiratory protection and handling
recommendations. If there is a risk of arc or flash, technicians MUST put on all necessary Personal Protective
Equipment (PPE) in accordance with NFPA70E for arc/flash protection PRIOR to servicing the unit. Failure to
follow recommendations could result in death or serious injury.
Follow EHS Policies!
Failure to follow instructions below could result in death or serious injury.
All Trane personnel must follow the company's Environmental, Health and Safety (EHS) policies when
performing work such as hot work, electrical, fall protection, lockout/tagout, refrigerant handling, etc. Where
local regulations are more stringent than these policies, those regulations supersede these policies.
Non-Trane personnel should always follow local regulations.
System 1
Heat Only
Black
R
24 24
VAC White VAC
C
Red
Heat W1
Y1
Purple
GH
Fan High
Yellow
Fan Medium
GM
Gray
Fan Low GL
Orange/White
Pipe Sensor
PS
(Optional)
Red/White
Remote Sensor RS
(Optional)
Blue/White
SC
System 7
4-Pipe Auto Changeover
Black
R
24 24
VAC White VAC
C
Red
Heat W1
Blue
Cool Y1
Purple
GH
Fan High
Yellow
Fan Medium GM
Gray
Fan Low GL
PS
Red/White
Remote Sensor RS
(Optional)
Blue/White
SC
WARNING
WARNING
WARNING

Wiring Diagrams

System 2 System 3
Cool Only 2-Pipe Manual Changeover
Black Black
R
24
White VAC White
C
Red
W1 Heat/Cool
Blue
Cool Y1
Purple Purple
GH
Fan High Fan High
Yellow Yellow
Fan Medium Fan Medium
GM
Gray Gray
Fan Low GL Fan Low
Orange/White Orange/White
Pipe Sensor Pipe Sensor
PS
(Optional) (Optional)
Red/White Red/White
Remote Sensor RS Remote Sensor
(Optional) (Optional)
Blue/White Blue/White
SC
System 5
System 6
2-Pipe Manual Changeover
with Auxiliary 4-Pipe Manual Changeover
Black Black
R
24
White VAC White
C
Red Red
Heat/Cool W1 Heat
Blue Blue
Auxiliary Y1 Cool
Purple Purple
GH
Fan High Fan High
Yellow Yellow
Fan Medium GM Fan Medium
Gray Gray
Fan Low GL Fan Low
Orange/White
Pipe Sensor
PS
(Required)
Red/White Red/White
Remote Sensor RS Remote Sensor
(Optional) (Optional)
Blue/White Blue/White
SC

Icon Descriptions

Hazardous Service Procedures!

Failure to follow all precautions in this manual and on the tags, stickers, and
labels could result in death or serious injury. Technicians, in order to protect
themselves from potential electrical, mechanical, and chemical hazards, MUST
Fan follow precautions in this manual and on the tags, stickers, and labels, as
operation
well as the following instructions: Unless specified otherwise, disconnect all
icon
Auto
electrical power including remote disconnect and discharge all energy storing
Fan
devices such as capacitors before servicing. Follow proper lockout/tagout
procedures to ensure the power cannot be inadvertently energized. When
necessary to work with live electrical components, have a qualified licensed
electrician or other individual who has been trained in handling live electrical
HEAT COOL
components perform these tasks.
Heating operation Cooling operation
icon icon

Specifications

1. Turn off power to the heating and cooling system by removing the fuse or switching the appropriate
Electrical rating: 18-30 VAC, 2 amp maximum per output
circuit breaker off.
T emperature control range: 45°F to 90°F (7°C to 32°C)
2. Remove cover of old thermostat. This should expose the wires.
Accuracy: ± 1°F (± 0.5°C)
3. Label the existing wires with the enclosed wire labels before removing wires.
Timing: Backlight Operation: 10 seconds
4. After labeling wires, remove wires from wire terminals or remove wire nuts.
Terminations: R, C, W1, Y1,GH, GM, GL, PS, RS, SC
5. Remove existing thermostat base from wall.
6. Refer to the following section for instructions on how to install this thermostat.
Package Contents/Tools Required
Package includes: 3518-7065 thermostat on base, thermostat
cover, screws and wall anchors, Installation
NOTICE: Thermostat installation must conform to local and national building and electrical codes and
guide. ordinances.
NOTICE: Mount the thermostat about five feet above the floor. Do not mount the thermostat on an
Tools required for installation: Drill with 3/16" bit, hammer,
screwdriver outside wall, in direct sunlight, behind a door, or in an area affected by a vent or duct.
1. Turn off power by removing the fuse or switching the appropriate circuit breaker off.
2. To remove cover, remove screw and pull gently at the seam at the top.
3. Set thermostat away from working area.
4. Align thermostat base with junction box mounting holes and feed the control wires through hole.
System 4
5. Use supplied screws to mount thermostat base to junction box.
2-Pipe Seasonal Changeover
NOTICE: Be sure exposed portion of wires does not touch other wires.
Black 6. Connect wiring harness.
R R
24 7. Snap thermostat to base that is mounted on the wall. Refasten with screw.
VAC White
C C 8. Turn on power to the system at the main service panel.
Red 9. Test thermostat operation as described in "Testing the Thermostat".
W1 Heat/Cool W1
Y1 Y1
Purple
The configuration mode is used to set the thermostat to match your heating/cooling system.
GH GH
Fan High
To configure the thermostat, perform the following steps:
Yellow
Fan Medium
GM GM
1. Verify the thermostat is in the OFF mode. Press the SYS button until off mode displays.
Gray
2. Press the CONFIG button for 5 seconds while the thermostat is in OFF mode.
GL Fan Low GL
Press the up or down button to change settings within each screen.
Orange/White
Pipe Sensor
PS PS Press the CONFIG button to advance to the next screen.
(Required)
Red/White Note: Pressing the SYS button will return you to the previous screen.
RS Remote Sensor RS
To exit configuration mode, press the CONFIG switch for 5 seconds.
(Optional)
Blue/White
SC SC
Wire Designator
1 – System
Descriptions
Select the type of operation you require.
R – 24 VAC Hot Black 1. Heat Only is for a system with only heating.
R
2. Cool Only is for a system with only cooling.
C – 24 VAC Common White
C 3. 2-Pipe Manual Changeover is for a 2 pipe system that handles both heating and cooling. The user
W1 – Heat Red
selects whether the system will be set to heating or set to cooling.
W1
4. 2-Pipe Seasonal Changeover is for a 2 pipe system that handles both heating and cooling. The
Y1 – Cool Blue
thermostat selects whether the system will be set to heat or set to cool based on the pipe sensor
Y1
GH – Fan High Purple temperature. (Default)
5. 2-Pipe Manual Changeover with Auxiliary is for a 2 pipe system that handles both heating and
GM – Fan Medium Yellow
GH
cooling. The user selects whether the system will be set to heat or set to cool. If set to heat and the
pipe sensor indicates there is not heat, the auxiliary output will be turned on.
GL – Fan Low Gray
GM
6. 4-Pipe Manual Changeover is for a 4 pipe system. The user selects whether the system will be set
PS – Pipe Sensor (optional) Orange/White
to heat, cool or off.
GL
RS – Remote Sensor Red/White
7. 4-Pipe Auto Changeover is for a 4 pipe system. The user selects whether the system will be set to
heat, cool, heat & cool or off.
PS
SC – Sensor Common Blue/White
RS
SC
WARNING

To Remove Existing Thermostat

To Install Thermostat

Configuration Mode

SYS
Up
button
CONFIG
FAN
Down
button

Configuration Mode Settings