protech HC-TST412MDMS Series Installation And Operating Instructions Manual

Save these instructions for future use!

FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS
CAREFULLY BEFORE INSTALLING OR OPERATING THIS
CONTROL COULD CAUSE PERSONAL INJURY AND/OR
PROPERTY DAMAGE.

APPLICATIONS

THERMOSTAT APPLICATION GUIDE

Description

Modulating PWM output, gas furnace Yes
Heat Pump (with Aux. or Emergency Heat), 2 Stage Yes
Systems with up to 3 Stages Heat, 2 Stages Cool Yes
Heat Only Systems Yes
Wired Remote Temperature Sensor (Indoor or Outdoor) Yes
Dual Fuel Feature (Heat Pump Mode) Yes
Compressor Fault Detection Yes
Humidifi cation Control Yes
Dehumidifi cation Control Yes

Please refer to the system installation and operating
manual for more detailed instructions and options.

Installation and Operating Instructions

for Hum/Dehum Modulating

Touchscreen Thermostat

Model Programming Choices

(-)HC-TST412MDMS

Modulating Touchscreen Thermostat

7 Day 5/1/1 Day Non-Programmable

(-)HC-TST412MDMS

SPECIFICATIONS

Electrical Rating:

Battery Power. . . . . . . . . . . . . . . . . . . . . . . . . . mV to 30 VAC, NEC Class II, 50/60 Hz or DC

Input-Hardwire . . . . . . . . . . . . . . . . . . . . . . . . . 20 to 30 VAC

Terminal Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5A per terminal, 2.5A maximum all terminals combined

Setpoint Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 to 99°F (7 to 32°C)

Differential (Single Stage) . . . . . . . . . . . . . . . . . . . . Heat 0.6°F; Cool 1.2°F

Differential (Multi-Stage) . . . . . . . . . . . . . . . . . . . . . Heat 0.6°F; Cool 1.2°F

Differential (Heat Pump) . . . . . . . . . . . . . . . . . . . . . Heat 1.2°F; Cool 1.5°F

Operating Ambient. . . . . . . . . . . . . . . . . . . . . . . . . . 32°F to +105°F (0 to +41°C)

Operating Humidity . . . . . . . . . . . . . . . . . . . . . . . . . 90% non-condensing max.

Shipping Temperature Range . . . . . . . . . . . . . . . . . -4 to +150°F (-20 to +65°C)

Dimensions Thermostat. . . . . . . . . . . . . . . . . . . . . . 4.6"H x 5.9"W x 1.2"D

CAUTION

!

To prevent electrical shock and/or equipment damage,
disconnect electric power to system at main fuse or circuit
breaker box until installation is complete.

Index Page

Installation 2

Wiring Connections 2

Wiring Diagrams 3

Thermostat Quick Reference 5

Installer Confi guration Menu 6

Operating Your Thermostat 10

Programming 12

Troubleshooting 15

ATTENTION: MERCURY NOTICE

This product does not contain mercury. However, this
product may replace a product that contains mercury.

Mercury and products containing mercury must not be
discarded in household trash. Do not touch any spilled
mercury. Wearing non-absorbent gloves, clean up any
spilled mercury and place in a sealed container. For prop­er disposal of a product containing mercury or a sealed
container of spilled mercury, place it in a suitable shipping
container. Refer to www.white-rodgers.com for location
to send product containing mercury.

PART NO. 37-6981A

0843

INSTALLATION

WARNING

!

Thermostat installation and all components of the
control system shall conform to Class II circuits per
the NEC code.

Remove Old Thermostat

A standard heat/cool thermostat consists of three basic parts:

1. The cover, which may be either a snap-on or hinge type.

2. The base, which is removed by loosening all captive
screws.

3. The switching subbase, which is removed by unscrewing
the mounting screws that hold it on the wall or adapter
plate. Before removing wires from old thermostat,
label each wire with the terminal designation from
which it was attached. Disconnect the wires from the old
thermostat one at a time. Do not let wires fall back into
the wall.

Installing New Thermostat

1. Pull the thermostat body off the thermostat base. Forcing
or prying on the thermostat will cause damage to the unit.

2. Place base over hole in wall and mark mounting hole
locations on wall using base as a template.

3. Move base out of the way. Drill mounting holes. If you
are using existing mounting holes and the holes drilled
are too large and do not allow you to tighten base snug­ ly, use plastic screw anchors to secure the base.

4. Fasten base snugly to wall using mounting holes shown
in Figure 1 and two mounting screws. Leveling is for
appearance only and will not affect thermostat operation.

5. Connect wires to terminal block on base using
appropriate wiring schematic (see diagram sheet
37-6809).

6. Push excess wire into wall and plug hole with a fi re re­ sistant material (such as fi berglass insulation) to prevent
drafts from affecting thermostat operation.

7. Carefully line the thermostat up with the base and snap
into place.

Battery Location

2 "AA" alkaline batteries are included in the thermostat at the
factory with a battery tag to prevent power drainage. Remove
the battery tag to engage the batteries.
To replace batteries, set system to OFF, remove thermostat
from wall and install the batteries in the rear along the top of
the thermostat (see Figure 1).

Figure 1 – (-)HC-TST412MDMS Base

Mounting

Hole

Place Level
across
Mounting Tabs
(for appearance only)

B

DHM

Y2

Rear view of thermostat

+

S

-

L

HM

W/E

6

V

Stack
Power
Stealing
Switch

Mounting

Hole

Place Level

across

Mounting Tabs

(for appearance only)

2 "AA" Batteries

Power
Stealing
Switches

WIRING CONNECTIONS

Refer to equipment manufacturers' instructions for specifi c
system wiring information. After wiring, see CONFIGURA­TION section for proper thermostat confi guration.

TERMINAL DESIGNATION DESCRIPTIONS

Terminal Designation Description

DHM . . . . . . . . . . . . . . . . . . De-humidifi cation Relay

Y2 . . . . . . . . . . . . . . . . . . . 2nd Stage Compressor

Y . . . . . . . . . . . . . . . . . . . Compressor Relay

G . . . . . . . . . . . . . . . . . . . Fan Relay

RC. . . . . . . . . . . . . . . . . . . Power for Cooling

RH. . . . . . . . . . . . . . . . . . . Power for Heating

C . . . . . . . . . . . . . . . . . . . Common wire from secondary side of cooling

V . . . . . . . . . . . . . . . . . . . PWM Output

6 . . . . . . . . . . . . . . . . . . . Powered closed 3rd wire for 3-wire Zone

W/E . . . . . . . . . . . . . . . . . . Heat Relay/Emergency Heat Relay (Stage 1)

HM . . . . . . . . . . . . . . . . . . Humidifi cation Relay

L . . . . . . . . . . . . . . . . . . . Compressor malfunction or Comfort Alert signal input

-. . . . . . . . . . . . . . . . . . . . Common (DC) for wired remote temperature sensor

S . . . . . . . . . . . . . . . . . . . Frequency signal from remote temperature sensor

+ . . . . . . . . . . . . . . . . . . . Power (DC) to remote temperature sensor

B . . . . . . . . . . . . . . . . . . . Changeover valve for heat pump energized constantly in heating mode (default ON)

2

For wiring diagrams, see next page.
Wiring diagrams shown are for typical systems and describe
the thermostat terminal functions.

WIRING DIAGRAM

Modulating Touchscreen Thermostat Wiring Diagrams (-)HC-TST412MDMS

Figure 2 – Typical Dual Fuel Application - Single Stage Heat Pump

DHM

DHM

Single Stage, Multi-Stage, Heat Pump

ODD

THERMOSTAT MODEL: (-)HC-TST412MDMS

REMOTE SENSOR: F145-1378 (OUTDOOR), F145-1328 (INDOOR)
PLENUM SENSOR: 47-21711-20

Figure 3 – Two Stage

ODD

V

THERMOSTAT MODEL: (-)HC-TST412MDMS

REMOTE SENSOR: F145-1378 (OUTDOOR), F145-1328 (INDOOR)
PLENUM SENSOR: 47-21711-20

Modulating Touchscreen Thermostat Wiring Diagrams (-)HC-TST412MDMS

Single Stage, Multi-Stage, AC

Figure 4 – Typical Single Stage AC

DHM

ODD

THERMOSTAT MODEL: (-)HC-TST412MDMS

REMOTE SENSOR: F145-1378 (OUTDOOR), F145-1328 (INDOOR)

3

WIRING DIAGRAM

Figure 5 – Two Stage

DHM

HM

Relay
90-290Q
or equivalent

ODD

V

THERMOSTAT MODEL: (-)HC-TST412MDMS

REMOTE SENSOR: F145-1378 (OUTDOOR), F145-1328 (INDOOR)

Figure 6 – Typical Wiring for 120V Humidifi er System

R

24 VAC

NEUTRAL

HOT

120 VAC

Humidifier

HM

Humidifier

System

System

HOT

NEUTRAL

120 VAC

TRANSFORMER

(Refer to furnace instructions for humidity information)

Figure 7 – Typical Wiring for 24V Humidifi er System

R

24 VAC

NEUTRAL

TRANSFORMER

HOT

120 VAC

4

THERMOSTAT QUICK REFERENCE

5

6

7

8

9

10

11

12

13

14

15

16

17

18

Home Screen Description

Figure 9 – Home Screen Display

Day of Week

Room
Temperature

Time of Day

System
Switch

Fan
Switch

Indicates when
thermostat is calling
for Heat or Cool

Programming and Confi guration Items

Displays and "Keypad Lockout" when in keypad

1

lockout mode.

Displays

Lockout" when limited range is activated and locked.
Displays only "Temperature Limit" when limited range
is activated.

2

Indicates period of day being programmed.

3

RUN SCHEDULE (run program) key.

SET TIME key or HOLD temperature key.

4

Displays "Change Filter"/"Change Pad"/"Change UV

Lamp" when the system has run for the programmed

fi lter/humidity pad/UV lamp time period as a reminder
to change or clean your fi lter/humidity pad or to replace
UV lamp.

COPY key or INSTALLER CONFIG key.

CLEAN DISPLAY key allows 30 seconds to wipe off the

display or ADVANCE DAY key for programming.

Used in programming to set time and in confi guration

menu to change selections.

"Hold Until" indicates the time when a temporary hold

period will end.

"Hours" and "Days" displays during steps in installer

confi guration.

The words "Hold At" are displayed when the thermo-

stat is in the HOLD mode. "Temporary Hold At" is
displayed when the thermostat is in a temporary HOLD
mode.

"Humidity" indicates that the "Set At" display is Hu-

midity setpoint.

"System On" indicates when heating or cooling stage

is energized. "+2" indicates when a second stage is
energized.

"Copy" indicates the copy program feature is being

used during programming.

and "Temperature Limit" and "Keypad

Set Temperature

Temperature
UP/Down used for
modifying set point
as well as to
navigating the menus

Enters comfort
temperature settings
into the schedule

Menu key for entering
different modes such as
Cleaning, Configuration, Set

Battery Level Indicator

Time and Set Schedule

Indicating the current power level
of the 2 “AA” batteries.
Full power remaining.
Half power remaining.
Change The batteries should be replaced at this time.

Figure 10 – Programming & Confi guration Items

16 17

123456789

1
011

11 12

10

1

1

1

1

171

1

516

3

4

2

2

2

222

2

2

021

8

9

272

3

6

5

4

82930

3

3

323

1

6

33435

9

8

18

14
13

15

19

7

6

4

5

A steady "Cool Savings" display indicates the feature

is enabled in the installer menu. A fl ashing "Cool Sav-
ings" display indicates the feature is active.

"Remote" indicates that the indoor remote temperature

sensor, is being accessed. "Outdoor Remote" indi­cates the outdoor remote temperature sensor is being
accessed.

Display time, remote temperature or humidity.

"Heat Pump" displays when the system confi guration

is set to HP1/HP2.

"Call for Service" indicates a fault in the heating/cooling

19

systems. It does not indicate a fault in the thermostat.

Auto Schedule key for Auto Schedule function.

20

373

839

1

2

20

3

5