Comfort Stat CDT901 User Manual

CDT900 Series Touchscreen

Programmable Thermostat

SYSTEM

COOL

FAN

AUTO

WED

Running As SCHED

Room

Set To

SCHED

HOLD

CLOCK

SCREEN

CDT900 Series Touchscreen Programmable Thermostat

Contents

Application/Features............................. ....... ........... ................. ................. ........................... 2

Specifications/Ordering Information ..................... ................. ................. ............................. 4

Installation ........................................................ .. ................. ...............................................13

Wiring ................................................................... ................. ................. ............................ 17

Power the Thermostat .................................. ................ ................. ..................................... 34

Installer Setup ............................. ................. ................ ...................................................... 47

Installer System Test ................. ................. ................ ........................................................ 59

Operation ............................. ................. ............... ............................................................... 62

Programming .................. ................. ................. .................................................................. 68

Troubleshooting ................ ................. ................. ................................................................ 97

CDT900 Series Touchscreen Pro

rammable Thermostat

APPLICATION

The CDT900 Series Touchscreen Programmable Thermostat is an effortless, 7-Day

PRODUCT DATA

programmable thermostat that provides universal system compatibility, precise comfort control and is easy-to-program. The CDT900 Series Thermostats provide temperature control for gas, oil, electric and heat pumps for up to 3 heat, 2 cool systems including dual fuel operation plus dehumidification control.

FEATURES

·Large, clear display with backlight shows the current and set temperature and thermostat in the dark.

CDT900 Series T ouchscreen Programmable Thermostat

·Menu-driven programming make setup effortless.

·Beautiful ergonomic design is smart and sophisticated to match your custome

lifestyle.

·Touchscreen interaction

·Real-time clock keeps time during power failures and automatically updates to

daylight savings.

·"Saving Chan ges" notificat ion lets you know when the schedule ch anges have been saved.

·Change/check reminders let you know when to service or replace filters or batteries

·Various Hold options allow you to override the program schedule, as desired.

·Armchair programming allows you to remove the thermostat from the wall fo

programming.

SPECIFICATIONS

Thermostat Description:

Featre Description

CDT900 Series Touchscreen Programmable Thermostat

Powering methods Common wire with battery bac ku p System types (up to3 heat/2 cool)

·Gas, oil or electric heat with air conditioning

·Warm air, hot water, high-effic iency fur naces, heat

pumps, steam and gravity

·Heat on

ly inclu

des power to open and power to close zone val v es ( series 20) and normally-open zone valves

·Heat only with fan

·Cool only

Changeover Manual or Auto changeover selectable System setting Heat-Off-Cool-Auto (Emer for heat pumps) Fan setting Auto-On-Circ

·750 mV heating systems

Electrical Ratings:

CDT900 Series Touchscreen Programmable Thermostat

W Heating 20 - 30 Vac 02 - 1.0A W Heating (Powerpile) 750 mV dc 100 mA dc Y Cooling 20 - 30 Vac .02 - 1.0A G Fan 20 - 30 Vac 02 - .60A

Terminal

Voltage (50/60 Hz ) Running Cu rrent

Temperature Setting Range: Heating: 40°F to 90°F(4°C to 32°C). Cooling: 50°F to 99°F (10°C to 37°C).

Operating Am bient Temperature: 32°F to 120°F(0°C to 49°C).

Shipping Temperature: CDT900 Thermostats: -30 °F to 150 °F

(-34.4°C to 65.6°C).

Operating Relative Humidity (Non-condensing):

CDT900 Series Thermostats: 5% to 90%.

CDT900 Series Touchscreen Programmable Thermostat

IRS-1: 5% to 95%. ORS-1: 5% to 95%.

Humidity Setting Range (CDT901 models only):

Cooling: 40% to 80% RH.

Humidity Display Range (CDT901 models only):

0% to 99%. Cycle Rates (at 50% Load):

Heating: Selectable 1 - 12 cycles per hour. Cooling: Selectable 1 - 6 cycles per hour.

Clock Accuracy: +/- 1 minute per month.

Batteries:

Two replaceable AA alkaline batteries: Power thermostats when 24 Vac common is not used. Non-replaceable lithium battery with ten-year life under normal use to hold calendar and time settings. Alkaline batteries keep calendar and time after lithium battery is no longe functional.

Cool Indication: CDT900 series Touchscreen Thermostats show "Cool On" on the screen when Cool is

CDT900 Series Touchscreen Programmable T hermostat

activated. Heat Indication:

CDT900 series Touchscreen Thermostats show " activated.

Heat On

" on the screen when Heat is

ORDERING INFORMATION

If you have additional questions, need further informatio n, or would like to comment on ou products or services, please write or phone:

CDT900 Series Touchscreen Programmable T hermostat

1. Smart Electric Attn: Warranty Department 12201 NW 107th Ave Miami, Fl 33178

2. Call Customer Service at 1-866-591-9898 Auxiliary Heat Indication:

CDT900 Touchscreen Thermostats show " is activated.

x Heat On" on the screen when Auxiliary H eat

Emergency Heat Indication: CDT900 Touchscreen Thermostats show " activated and the System mode is in the Emer position.

Calibration:

at On" on the screen when Emergency Heat is

CDT900 Touchscreen Thermostats are factory-calibrated and require no field calibration. Nomenclature:

CDT900 Series Touchscreen Programmable T hermostat

Series System Stages

CDT900

3H/2C CDT900 - Standard

CDT901

CDT901-Humidity Sensor

Application

Mounting Means:

CDT900 Series Touchscreen Thermostat: Mounts directly on the wall in the living space using mounting screws and anchors provided. Outdoor Sensor: Mounts outside of living space with mounting clip and screws provided. Remote Indoor Sensor: Mounts directly on the wall using mounting screws and anchors provided.

Dimensions: CDT900 Series Touchscreen T h er m o s t at: see Fig 1.

1. CDT900 Outdoor Sensor Mounti ng Clip: see Fig 2.

2. Cover Plate: see Fig 3.

3. CDT900 Series Remote Indoor Sensor: see Fig. 4

CDT900 Series Touchscreen Programmable T hermostat

1.77 in.(45mm)

1.51 in.(38.5mm) 0.84 in .(21.5mm)

1.67 in.(42.5mm)

CDT900 Series Touchscreen Programmable T hermostat

5.98 in.(152mm)

4.48in. (114mm)

1.17 in.(29.84mm)

Fig. 1. Touchscreen Thermostat dimensions in in. (mm).

CDT900 Series Touchscreen Programmable T hermostat

(

)

(

)

1.82 in.(46.3mm)

1.49 in.(38mm)

1.56 in .(39.7mm)

1.10 in.(28.1mm)

(

)

0.08 in.(2mm)

(

)

0.44 in .(11.2mm)

Fig. 2. Outdoor Sensor Mounting Clip dimensions in in. (mm).

0.62 in.(16mm)

0.24 in.(6.2mm)

CDT900 Series Touchscreen Programmable T hermostat

5.35 in.(136mm)

3.29 in.(83.5mm)

0.85 in .(21.5mm)

3.29 in.(83.5mm)

4.13 in.(105mm)

Fig. 3. Cover Plate dimensions in in. (mm).

INSTALLATION

CDT900 Series Touchscreen Programmable T hermostat

When Installing this

1.Read these instructions carefully. Failure to follow the instructions can damage the product or cause a hazardous con dition.

2.Check the ratings given in the instructions to make sure the product is suitable for you application.

3.Installer must be a trained, experienced ser vic e technician.

4.After completing installation, use these instructions to check out the product operation.

Selecting

Install the thermostat about 5 ft. (1.5m) above the floor in an area with good air circulation at average temperature. See Fig. 5.

Do not install the thermostat where it ca n be affected by:

----Drafts or dead spots behind doors and in corners.

----Hot or cold air from ducts.

----Radiant heat from sun or appliances. Concealed pipes and chimneys.

----Unheated (uncooled) areas such as an outsid e wall behind the thermostat.

Location

Product...

CDT900 Series Touchscreen Programmable T hermostat

5FEET

1.5METERS

Fig. 5. Selecting thermostat location.

Installing Wallplate

CDT900 Series Touchscreen Programmable T hermostat

CAUTION

Electrical Hazard. Can cause electrical shock or equipment damage.

Disconnect power before wiring.

The thermostat can be mounted horizontally on the wall

1.Position and leve l the wallplate (fo r appe arance only).

2.Use a pencil to mark the mounting holes.

3.Remove the wallplate from the wall and, if drywall, drill two holes in the wa ll, as marked. Fo

firmer material such as plaster, drill two holes. Gently tap anchors (provided) into the drilled holes until flush with the wall.

4.Position the wallplate over the holes, pulling wires through the wiring opening. See Fig. 6

5.Insert the mounting screws into the holes and tighten.

CDT900 Series Touchscreen Programmable T hermostat

WALL

WIRES THROUGH WALL AND WIRE SLOT

WALL ANCHORS

M0UNTING

HOLES(2)

M0UNTING SCREWS(2)

Fig. 6. Mounting wallplate.

WIRING (FIG. 9

ll wiring must comply wi th local electrical co des and ordinances.

21)

1.Select set of terminal identifications (Table 1) that corresponds with system type

CDT900 Series Touchscreen Programmable T hermostat

(conventional or heat pump in Fig. 7).

2.Loosen the screws for the appropriate system type selected; see Table 1. See T able 2 fo terminal designation descriptions. Insert wires in the terminal block under the loosened screw. See Fig. 8.

3.Securely tighten each screw.

4.Push excess wire back into the hole.

5.Plug the hole with nonflammable insulation to prevent drafts from affecting the thermostat.

6.See Fig. 9 through 21 for typical wiring hookups.

S1 S2 C R RC W W2 Y2 Y G

S1 S2 C R RC E L Y2 Y G

O/B AUX

CONVENTIONAL

SCREW

TERMINALS

HEAT PUMP

Fig. 7. Selecting terminal identifications for

system type.

CDT900 Series Touchscreen Programmable T hermostat

Table 1. Select ing Terminal Identifications for System Type.

Heat Only (Series 20) Power to open and

System Type

Standard Heat/Cool Conventional

Heat Only Conventional

Heat Only with Fan Conventional

power to close zone valves

Normally Open Zone Valves Heat Only

Cool Only Conventional

Wallplate Terminal

Identifications

Conventional Conventional

Standard Multistage up to 2 Heat/2 Cool Conventional

Heat Pump with No Auxiliary Heat Heat Pump

Heat Pump with Auxiliary Heat Heat Pump

Wirin g Diagram

Reference

9, 10

11 12

13 14

15 16, 17 18, 19 20, 21

TANT

CDT900 Series Touchscreen Programmable T hermostat

IMPO

Fig. 8. Inserting wires in terminal block.

:Use 18 gauge thermostat wire.

Table 2. Terminal Designation Descriptions.

CDT900 Series Touchscreen Programmable Thermostat

Terminal Designation Description

Rc (see Note 1)

R (see Note 1) C (see Note 2)

W Heat relay

Power for cooling--connect to secondary side of cooling

system transformer

Power for heating--connect to secondary side of heating

system transformer

Common wire from secondary side of cooling system

transformer

Y Compressor contactor

G Fan relay

Y2 Second stage cooling

W2 Second stage heat relay

O/B (see Note 3) Changeover valve for heat pump systems

AUX Auxiliary heat relay for heat pump systems

E Emergency heat relay for heat pump systems

L (see note 4) Equipment monitor for heat pump systems

S1, S2 Optional outdoor or indoor remote sensor

NOTES:.

1.When sed in a single-transformer system, leave metal jumper wire in place between Rc and R. If used on a two-transformer system, remove metal jumper wire between Rc and R.

2.Common wire is optional when thermostat is used with batteries.

3. If thermostat is configured for a heat pump system in the Installer Setup, configure

changeover valve for cool (O -factory setting) or heat (B).

4.L terminal is an input (system monitor) when the System mo de is in the Heat, Off, Cool o uto position. L terminal is a 24 Vac output when System mode is Emergency Heat. Must

connect the 24 Vac Common when using the L terminal. See LCD Indication section for more details.

CDT900 Series Touchscreen Programmable T hermostat

OUTDOOR/INDOOR TEMPERATURE SENSOR

OPTIONAL 24VAC COMMON CONNECTION

HEAT RELAY

FAN RELAY

S1 S2 C R RC W W2 Y2 Y G

CONVENTIONAL

1.POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

2. FACTORY INSTALLED JUMPER.

3.OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE FROM THE THERMOSTAT CABLE

Fig. 9. Typical hookup of conventional single-stage heat and cool system with single

transformer(1H/1C conventional).

OUTDOOR/INDOOR

TEMPERATURE SENSOR

HEAT RELAY

COMPRESSOR CONTACTOR

OPTIONAL 24VAC COMMON CONNECTION

FAN RELAY

1.POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

2.REMOVE FACTORY INSTALLED JUMPER

3.OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE FROM THE THERMOSTAT CABLE.

S1 S 2 C R RC W W2 Y2 Y G

CONVENTIONAL

Fig. 10. Typical hookup of conventional single-stage heat and cool system with two

transformers (1H/1C conventional).

CDT900 Series Touchscreen Programmable T hermostat

OUTDOOR/INDOOR TEMPERATURE SENSOR

OPTIONAL 24VAC COMMON

CONNECTION

HEAT RELAY

S1 S2 C R RC W W2 Y2 Y G

1. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED

2. FACTORY INSTALLED JUMPER.

3. OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE FROM THE THERMOSTAT CABLE

CONVENTIONAL

Fig. 11. Typical hookup of heat-only system (1 H conventional).

CDT900 Series Touchscreen Programmable T hermostat

1. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED

2. FACTORY INSTALLED JUMPER.

3. OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE FROM THE THERMOSTAT CABLE

Fig. 12. Typical hookup of heat only system with fan (1H con ventional).

OUTDOOR/INDOOR TEMPERATURE SENSOR

OPTIONAL 24VAC COMMON CONNECTION

HEAT RELAY

S1 S2 C R R C W W2 Y2 Y G

FAN RELAY

CONVENTIONAL

CDT900 Series Touchscreen Programmable T hermostat

OUTDOOR/INDOOR TEMPERATURE SENSOR

SERIES 20

MOTOR OR VALVE

S1 S2 C R RC W W2 Y2 Y G

CONVENTIONAL

1. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED

2. FACTORY INSTALLED JUMPER.

3. OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE FROM THE THERMOSTAT CABLE

Fig. 13. Typical hookup of heat only power to open and power to close zone valve

(Series 20) system.

CDT900 Series Touchscreen Programmable T hermostat

OUTDOOR/INDOOR

TEMPERATURE SENSOR

OPTIONAL 24VAC COMMON

CONNECTION

NORMALLY OPEN

ZONE VALVE

1. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED

2. FACTORY INSTALLED JUMPER.

3. OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE FROM THE THERMOSTAT CABLE

Fig. 14. Typical hookup of he at only system with normall y open zone valves.

S1 S 2 C R R C W W2 Y2 Y G

CONVENTIONAL

CDT900 Series Touchscreen Programmable T hermostat

1. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED

2. FACTORY INSTALLED JUMPER.

3. OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE FROM THE THERMOSTAT CABLE

OUTDOOR/INDOOR TEMPERATURE SENSOR

S1 S2 C R RC W W2 Y2 Y G

OPTIONAL 24VAC COMMON CONNECTION

HEAT RELAY

COMPRESSOR CONTACTOR

FAN RELAY

CONVENTIONAL

Fig. 15. Typical hookup of cool only system ( 1 C co nventional ) .

CDT900 Series Touchscreen Programmable T hermostat

OUTDOOR/INDOOR

1. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED

2. FACTORY INSTALLED JUMPER.

3. OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE FROM THE THERMOSTAT CABLE

CONVENTIONAL

TEMPERATURE SENSOR

HEAT RELAY 1

HEAT RELAY 2

COOL RELAY 2

COOL RELAY 1

S1 S2 C R RC W W2 Y2 Y G

FAN RELAY

OPTIONAL 24VAC COMMON CONNECTION MUST COME FROM THE COOLING TRANSFORMER

Fig. 16. Typical hookup of conventional multistage two-stage heating and two-stag

cooling in a single-transformer system (2H/2C, 2H/1C or 1H/2C conventional).

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Comfort Stat CDT901 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual