Installation and Maintenance Manual IM-846
Group: Fan Coil
Part Number: IM 846
Date: July 2006
T170 Thermostat
24 VAC/120–277 VAC
3-Speed Fan Control (Continuous or Cycling) or Staged Fan Control
© 2006 McQuay International
USUS
Contents
Installation Instructions . . . . . . . . . . . . . . . . . . . . . 3
Thermostat Model and Part Number . . . . . . . . . . . . . . . . . . . . . . . . 3
Optional Occupancy Detection Sensors/Kits . . . . . . . . . . . . . . . . . . 3
Mounting and Wiring the Thermostat . . . . . . . . . . . . . . . . . . . . . . . . 3
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Thermostat Button Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
System Button Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
UP/Down Arrow Button Operation . . . . . . . . . . . . . . . . . . . . . . 5
Fan Button Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Speed Button Operation (TA170-001) . . . . . . . . . . . . . . . . . . . 5
F/C Button Operation (TB170-001) . . . . . . . . . . . . . . . . . . . . . 5
Verifying Thermostat Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Thermostat Menu Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Menu Function Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Menu Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Condensate Overflow Interrupt . . . . . . . . . . . . . . . . . . . . . . . . 6
Fan Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Standard Fan Configuration (TA170-001). . . . . . . . . . . . . . . . 7
Staged Fan Configuration (TB170-001) . . . . . . . . . . . . . . . . . 7
Controlled Off Factory Configuration . . . . . . . . . . . . . . . . . . . 7
Fancoil Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2-Pipe Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4-Pipe Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Setback Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Optional Occupancy Detection Equipment Opera-
tion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
SB200-001 Occupancy Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
SD200-001 Occupancy Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
SD200-002 Occupancy Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Installation Instructions
WARNING
• BEFORE ATTEMPTING TO INSTALL, OPERATE, OR
SERVICE THIS THERMOSTAT, CAREFULLY READ
THESE INSTRUCTIONS.
• Failure to observe safety information and comply with
instructions could result in PERSONAL INJURY, DEATH,
AND/OR PROPERTY DAMAGE.
• To avoid potential fire and/or explosion, do not use in
potentially flammable or explosive atmospheres.
• Retain these instructions for future reference. This product,
when installed, is part of an engineered system whose
specifications and performance characteristics are not
designed or controlled by McQuay. You must review your
application and national and local codes to assure that your
installation is functional and safe.
DANGER
Hazardous voltage. To avoid electrical shock or damage to
equipment, disconnect power before installing or servicing.
Failure to follow these instructions will result in death or serious
injury.
Installation Instructions
Mounting and Wiring the Thermostat
The thermostat base mounts to a field provided 4″ × 4″ outlet
box with a 2
assembly mounts to the thermostat base.
Figure 1: Mounting the thermostat
To avoid damaging the unit,
make all wiring connections
inside the box.
″ × 4″ mud ring (Figure 1). The thermostat cover
4 × 4 outlet box
CAUTION
2 × 4 mud ring
Cover locking snaps
(both sides)
Base
Cover assembly
Thermostat Model and Part Number
McQuay offers two different thermostats depending on the fan
speed control used (Table 2).
Table 1: Thermostat model and part numbers
Thermostat Model # McQuay Part # Fan Speed Control
TA170-001 107345335
TB170-001 107345336
Note – For a list of thermostat features, refer to ED 3611.
3-Speed Fan Control
Staged Fan
Optional Occupancy Detection Sensors/Kits
In addition to the T170 thermostat, McQuay offers optional
occupancy detection sensors (see page 9) that can be ordered
and used in conjunction with the thermostat. When ordering,
use the associated kit number(s) provided in Table 2.
Table 2: Occupancy sensor model and kit numbers
Sensor Model # McQuay Kit #
SA200-001 6677877211
SB200-001 6677877311
SD200-001 6677877411
SB200-002 6677877511
1
Disconnect power before installing or servicing.
2 Run line voltage wiring (and low voltage wiring if
applicable) into the field provided outlet box and mud ring
(Figure 1).
3 Locate all connections within the mud ring/connection box
and wire nut all unused wires.
4 Remove the thermostat cover assembly from its base to
gain access to the circuit board (Figure 2).
Figure 2: Circuit board
McQuay IM 846 3
Installation Instructions
5
On the circuit board, set the voltage selection switch
(Figure 2) to the appropriate voltage for the application
• 24 V = 24 VAC
• 110–277 V = 120, 240, or 277 VAC.
Note:
The circuit board is shipped with the voltage selection switch
in the 110-227 V position. For 24 VAC use, the switch must
be in the 24 V position.
CAUTION
Before applying power, the voltage selection switch must be in
the appropriate position. Failure to select the correct voltage
can cause thermostat malfunction or permanently damage the
thermostat.
6 The circuit board is also equipped with configuration
jumpers (JP1, JP3, and JP4 in Figure 2). Depending on the
application, it may be necessary to reconfigure the
following jumpers:
•JP4: 2/4 Pipe Sensor Jumper - This jumper selects
between 2-pipe (jumper ON) and 4-pipe (jumper OFF)
operation (see “Fan Operation” on page 7).
•JP3: Door/Window Switch Jumper - This jumper is
shipped normally open. Placement of a jumper allows
for occupancy detection and door/window switch only
operation (see “Optional Occupancy Detection
Equipment Operation” on page 9).
•JP1: Removal of this jumper allows the sensor to be
located in a remote location.
CAUTION
To use a remote sensor on units with local sensing capability,
remove jumper JP1 to disable local sensing. Failure to remove
JP1 can cause improper operation of the thermostat with a
remote probe installed.
7 Connect the color coded thermostat wires (Figure 3) to the
line voltage wires located in the mud ring/connection box
and secure the connections with wire nuts.
Figure 3: Wiring diagram
White/Black
White/Yellow
White/Violet
LOW VOLTAGELINE VOLTAGE
White/Blue
White/Gray
Yellow
Blue
Red
White/Brown
White/Red
THERMOSTAT CONNECTIONS
White/Orange
Brown
Black
Setback input/door switch
Circuit common
Occupacy detector
Cool
(main output)
Heat
(secondary output)
Fan low
Fan medium
Fan high
Outside air
Remote probe
Pipe sensor
L2/Neutral
Outputs
(see ratings)
Accessories
available
from
McQuay
L1
CAUTION
Use copper wire only. Insulate or wire nut all unused leads.
Avoid electrostatic discharge to the thermostat.
Failure to do so can cause thermostat malfunction or
permanently damage the thermostat.
8 Install the thermostat base to the mud ring/outlet box using
two furnished mounting screws. Tighten the screws evenly
but do not over tighten.
Note: An output ratings chart (Table 3) is located on the
inside of the base.
Table 3: Output ratings
Output ratings
Voltage
24 VAC NA NA NA 24 VA NA
120 VAC 5.8 34.8 6.0 125 VA 1/4
240 VAC 2.9 17.4 5.0 125 VA 1/4
277 VAC 2.4 14.4 4.2 125 VA 1/4
Inductive
FLA LRA
Resistive
amps
Pilot duty HP
DANGER
Hazardous voltage. Combined load current is not to exceed 20
amps. Mount only to a grounded metallic box.
Low voltage wiring is Class 2. To avoid electrical shock or
damage to equipment, disconnect power before installing or
servicing. Failure to follow these instructions will result in death
or serious injury.
9
With the base now secured, verify that the circuit board is
firmly snapped into the cover and is not dislodged.
10 Install the cover assembly to the base, pressing firmly to
engage the cover locking snaps.
4 McQuay IM 846