Robertshaw 9401 User manual

Application

The Robertshaw 9401 is a single-stage thermostat designed to control

24 VAC gas or electric heating and cooling systems or single-stage heat

pump. The 9401 requires the use of a common wire.

Features

•Summer and winter setpoints

•Large back lit display

•Adjustable temperature differential: .5°F to 3.0°F (0.5°C to 1.5°C)

•Compressor short cycle protection

•Accuracy within ±1°

•Zone system compatible as a master thermostat

•Permanent memory retention

•Fahrenheit/Celsius display option

•Adjustable from 45°F to 90°F (7°C - 32°C)

•Quick wire terminal block

•Automatic heating shutdown if temperature exceeds 94°F (34°C)

DIGITAL

NON-PROGRAMMABLE

THERMOSTAT

9401

ELECTRIC

GAS

OIL

NeW

1 Heat / 1 Cool

User's Manual

Quick Start

Installation

110-1041

IMPORTANT SAFETY INFORMATION

WARNING:

•Always turn off power at main fuse or circuit breaker panel before

installing, removing, cleaning, or servicing thermostat.

•Read all the information in this manual before installing this

thermostat.

•This is a 24 VAC low-voltage thermostat. Do not install on voltages

higher than 30 VAC.

•All wiring must conform to local and national building and electrical

codes and ordinances.

•Do not short (jumper) across terminals on the gas valve or at the

system control to test installation. This will damage the thermostat

and void the warranty.

•Do not connect ground to any terminal in this unit.

Step 1: Replacing Existing Thermostat

1. Turn off power to heating and cooling system.

2. Remove cover from old thermostat to expose wires (Figure 1).

3. Disconnect wires one at a time from existing terminals. Use enclosed labels

to mark existing wires. Refer to cross references in Table 1 if existing wiring

does not directly match the labels.

4. Remove existing thermostat base from wall.

Old Terminal New Label Description

M,W,Rh,R5 or 5 Rh Heat transformer, hot side

V or Rc Rc Cool transformer, hot side

C,X, or B C 24VAC transformer, common side

Y or Y6 Y Cooling control

H,W, or 4 W Heating control

F or G G Fan control relay

OOCool active reversing valve

BBHeat active reversing valve

NOTE: THIS THERMOSTAT REQUIRES A 24V AC COMMON WIRE FOR PROPER OPERATION.

Table 1

Figure 1

Recycling Thermostat

If this thermostat is replacing a thermostat that contains mercury

in a sealed tube, do not place your old thermostat in the garbage.

Contact your local waste management authority for instructions

regarding proper disposal of the thermostat. If you have any ques-

tions, call Robertshaw technical support at 1-800-445-8299.

Step 2: Installing Model 9401 Thermostat

NOTE: FOR NEW INSTALLATIONS, MOUNT THERMOSTAT ON

INSIDE WALL, FIVE FEET ABOVE THE FLOOR. DO NOT

INSTALL BEHIND A DOOR, IN A CORNER, NEAR AIR

VENTS, IN DIRECT SUNLIGHT, OR NEAR ANY HEAT OR

STEAM GENERATING FIXTURES. INSTALLATION AT THESE

LOCATIONS WILL AFFECT THERMOSTAT OPERATION.

1. Turn power off to the heating and cooling systems.

2. Place HEAT-OFF-COOL in OFF position (Figure 2).

3. Place -ON-AUTO switch into AUTO position (Figure 2).

4. Remove the cover using a coin or screwdriver (Figure 3). Set aside.

Figure 3

SETTING OR CHANGING THE SETPOINT TEMPERATURE:

1. Press or button. Display will show SET and the current

temperature setpoint.

2. Press or button to adjust temperature setpoint.

3. After completing the change, the display will return to the current

room temperature after a few seconds.

CHANGING THE TEMPERATURE DIFFERENTIAL,

DEAD BAND, AND RESIDUAL COOL:

The temperature differentials are factory set at 1˚F and 2˚F for

1ST and 2ND stages respectively. The dead band for Auto-

changeover is set at 3˚F . Tochange settings:

1. Press the and buttons at the same time and hold for 1

second. Display will indicate: DIFFERENTIAL 1ST.

2. Press either the or button to adjust the 1st stage differ-

ential between 0.5˚F – 3˚F (0.5˚C - 1.5˚C).

3. Either wait five seconds or press the button. The display

will indicate: DIFFERENTIAL 2ND.

4. Press either the or button to adjust 2nd stage differen-

tial between 1˚F – 6˚F (1˚C - 3˚C).

5. Either wait five seconds or press the button. The display

will indicate: DEADBAND.

6. Press either the or button to adjust the dead band

between 3˚F – 6˚F (1.5˚C -3˚C).

7. Either wait five seconds or press the button. The fan

icon and ON will be displayed.

8. Press either the or button to adjust the Residual Cool

fan delay between 0, 30, 60, or 90 seconds.

9. The display will return to the current room temperature after

a few seconds.

Item

9555

120-1523

Maple Chase Company

www.maplechase.com

Tech Service: 1-800-445-8299

M-F 7:30 a.m. - 5:30 p.m. CST

MADE IN MEXICO

Figure 2

5. Place thermostat against the wall at desired location. Make sure wires

will feed through opening (Figure 4) on base of thermostat.

6. Mark placement of mounting holes (Figure 4). Set base aside.

7. If mounting on drywall, tap plastic anchors into wall.

NOTE: ENCLOSED PLASTIC ANCHORS DO NOT REQUIRE A

DRILLED HOLE FOR DRYWALL.

8. If mounting on a surface other than drywall, drill the marked holes

using a 3/16" drill bit.

9. Align base with plastic anchors and feed wires through opening.

10. Secure base to wall with supplied screws.

NOTE: THE THERMOSTAT WILL MOUNT HORIZONTALLY

ON A SINGLE GANG JUNCTION BOX.

11. Strip end of wires 5/16” if needed.

12. Terminal screws are already loose and ready for wire insertion.

Insert wires into terminal strip (Figure 5) matching the label to the

corresponding terminal (see Wiring Diagrams). Tighten screws.

13. Make sure wire connections are secure.

14. Push excess wire back through opening.

RESET

NON-HP

Mounting Holes

Wiring Opening

ELECGAS

Figure 4

Rh Rc C

Label

Figure 5

Hot

Heating

Control

Fan

Control

Cooling

Control

(COOLING)

Transformer

(HEATING)

Transformer

C C

24 VAC

120 VAC

Hot

Heating

Control

Fan

Control

Transformer

24 VAC

120 VAC

Hot

Heating

Control

Heating

Control

Transformer

24 VAC

120 VAC

Hot

120 VAC

Hot

120 VAC

HEAT

COOL

4-WIRE

SINGLE TRANSFORMER

HEAT ONLY

2-WIRE

SINGLE TRANSFORMER

HEAT ONLY

3-WIRE

SINGLE TRANSFORMER

Factory-Installed

jumper

Factory- Installed

jumper

Hot

Cooling

Control

Fan

Control

Transformer

24 VAC

120 VAC

COOL ONLY

3-WIRE

SINGLE TRANSFORMER

HEAT

COOL

5-WIRE

TWO TRANSFORMER

NOTE: Both transformers

must be in phase.

Cooling

Control

Fan

Control

NOTE: Cut center of

factory installed jumper

and bend back

NOTE: Cut center of factory installed

jumper and bend back.

Hot

Fan

Relay

Transformer

24 VAC

120 VAC

HEAT PUMP WITH

HEAT ACTIVE

REVERSING VALVE

Pre-Installed jumper

Compressor

Contactor

Reversing

Valve

Hot

Fan

Relay

Transformer

24 VAC

120 VAC

HEAT PUMP WITH

COOL ACTIVE

REVERSING VALVE

Pre-Installed jumper

Compressor

Contactor

Reversing

Valve

◆Wiring Diagrams

NOTE: Installer must place jumper between

W and Y terminals. NOTE: Installer must place jumper between

W and Y terminals.

15. Set the GAS/ELEC switch to either GAS for a gas/oil heating

system or ELEC for an electric heating system (Figure 6).

16. Set the HP/NON-HP switch to either the HP for heat pump or

NON-HP for furnace applications (Figure 6).

17. Replace thermostat cover by snapping into place.

RESET

NON-HP HP

ELECGAS

ROOM

OFF

NON-HP/HP

Switch

GAS/ELECTRIC

Switch

Figure 6

TERMINAL LEGEND - 9401

TERM EQUIPMENT TO CONNECT REQ? TERMINAL FUNCTION

Rh 24VAC hot connection Yes For input of 24VAC hot

side of heat transformer

Rc 24VAC hot connection Yes For input of 24VAC hot

side of cool transformer

C24VAC common connection Yes For input of 24VAC

common side of

transformer

WHeat connection Yes* Energizes on a call for

heating

YCompressor Connection Yes* Energizes on a call for

cooling

BHeat Active Reversing Valve No Energizes when in the

HEAT mode

OCool Active Reversing Valve No Energizes when in the

COOL mode

GIndoor fan connection Yes Energizes with Y & W

terminals in electric

mode; or with Y terminal

in gas mode; or with FAN

option switched to the

ON position

* This thermostat can be used as a heat only or cool only thermostat therefore it is not always

necessary to use both Y and W.

Step 3: Testing the Thermostat

WARNING: DO NOT SHORT (JUMPER) ACROSS TERMINALS OF GAS

VALVE OR SYSTEM CONTROL TO TEST OPERATION. THIS WILL

DAMAGE THE THERMOSTAT AND VOID YOUR WARRANTY.

CAUTION: DO NOT SWITCH SYSTEM TO COOL IF THE TEMPERATURE

IS BELOW 50°F (10°C). THIS CAN DAMAGE THE AIR

CONDITIONING SYSTEM AND CAUSE PERSONAL INJURY.

1. Place the HEAT-OFF-COOL switch into

the COOL position. The display will read COOL.

2. Press the button until the temperature setting

is at least 3 degrees below the room temperature.

The air conditioning system should turn on within

a few seconds. The snowflake icon will be displayed.

NOTE: ONCE THE THERMOSTAT TURNS OFF WHEN IN THE COOL MODE,

A BUILT IN 5-MINUTE DELAY PREVENTS THE SYSTEM FROM

TURNING ON AGAIN. THIS PROTECTS THE COMPRESSOR. NO

ADDITIONAL TIME DELAY RELAY IS REQUIRED. TO OVERRIDE THE

5-MINUTE DELAY FOR INSTALLATION, PRESS THE RESET BUTTON.

3. Put the HEAT-OFF-COOL switch into

the OFF position. The air conditioning system

should turn off.

4. Put the HEAT-OFF-COOL switch into

the HEAT position. The display will read HEAT.

5. Press the button until the temperature

setting is at least 3 degrees above room

temperature. The heating system should

turn on. The fan may not turn on immediately,

depending on the fan delay built into the furnace.

The flame icon will be displayed.

6. Put the HEAT-OFF-COOL switch into

the OFF position. The heating system should

turn off. The fan may continue to run for a

short period of time.

7. Put the -ON-AUTO switch into the ON

position. The blower fan should turn on.

The display will show a and ON.

8. Put the -ON-AUTO switch into the AUTO

position. The blower fan should turn off.

Step 4: Customizing the Thermostat

◆Settings

System

Cool: The thermostat controls the cooling.

Off: The heating and cooling systems are off.

Heat: The thermostat controls the heat.

Fan

Auto: Equipment controls the fan.

On: The fan operates continuously.

Temperature

Heating: The default temperature for heating is 70°F (21°C). To

change the default setpoint, put the system switch in HEAT and

press the or button to adjust the temperature setting up or

down. The display will show SET. The display will return to the

current room temperature three seconds after the last input and

the new setpoint will be saved.

Cooling: The default temperature for cooling is 78°F (25°C). To

change the default setpoint, put the system switch in COOL and

press the or button to adjust the temperature setting up or

down. The display will show SET. The display will return to the

current room temperature three seconds after the last input and

the new setpoint will be saved.

ROOM

OFF

Figure 7

◆Temperature Differential

The temperature differential is factory set at 1.0°F (.5°C). This means

that whenever the room temperature changes by one degree

Fahrenheit from the temperature setting, the system will turn on. If the

system turns on too often, increase the temperature differential.

◆Changing Fahrenheit (°F) to Celsius (°C),

and the Temperature Differential

1. The thermostat is preset to display the temperature in degrees

Fahrenheit (US models) or degrees Celsius (Canadian models). The

temperature display can be changed. Press and hold both the

and button for three seconds. The display will read F or C.

Release buttons. Press the or button to switch the display.

2. After three seconds the display will switch to the differential set-

tings. The display will read SET DIFF.

3. The temperature differential is factory set at 1.0°F (0.5°C). Press the

or button to adjust the differential up or down.

4. Wait three seconds or press and the display will return to the

original room temperature.

◆Backlit Display

This thermostat is equipped with a backlight to make nighttime temper-

ature adjustments quick and easy. Press the button to activate the

backlight. The backlight will turn off after about 5 seconds of inactivity.

◆Reset

To reset the thermostat press the RESET button located at the lower left

corner of the base.

RESET

RESET Switch

NON-HP HP

ELECGAS

ROOM

OFF

Step 5: Troubleshooting

Symptom Remedy

Thermostat does not turn on system. Check wiring (see Installation

section).

If problems with thermostat cannot be resolved, call:

Technical Support: (800) 445-8299

Monday-Friday 7:30 AM - 5:30 PM CST

Thermostat turns system on and

off too frequently. Increase temperature differential

(see Changing the Temperature

Differential section).

System fan does not operate

properly.

Move fan option switch to either

gas or electric, to match system

(see Installation section).

Thermostat does not display

proper room temperature. Check F/C (Fahrenheit/Celsius)

setting. See Changing Fahrenheit

(F) to Celsius (C).

Table of contents

Other Robertshaw Thermostat manuals

Robertshaw

Robertshaw 9901i User manual

Robertshaw

Robertshaw RS3110 User manual

Robertshaw

Robertshaw 8601 User manual

Robertshaw

Robertshaw RS9320T User manual

Robertshaw

Robertshaw 7700 User manual

Robertshaw

Robertshaw 300-204 User manual

Robertshaw

Robertshaw RS9110 User manual

Robertshaw

Robertshaw 9420 User manual

Robertshaw

Robertshaw 9200 User manual

Robertshaw

Robertshaw 8406 User manual

Robertshaw

Robertshaw RS9210 User manual

Robertshaw

Robertshaw RS4110 User manual

Robertshaw

Robertshaw RS4220C User manual

Robertshaw

Robertshaw 9600 User manual

Robertshaw

Robertshaw RS6000 User manual

Robertshaw

Robertshaw 9915i User manual

Robertshaw

Robertshaw 5300 Series Installation and user guide

Robertshaw

Robertshaw RS9110 User manual

Robertshaw

Robertshaw HOMEOWNER FRIENDLY 9715I User manual

Robertshaw

Robertshaw 9801i2 User manual

Robertshaw

Robertshaw 9901i User manual

Robertshaw

Robertshaw 9801i2 User manual

Robertshaw

Robertshaw RS10420T User manual

Robertshaw

Robertshaw C9701i2 User manual

Popular Thermostat manuals by other brands

EWELLY

EWELLY EW-181 manual

Prolon

Prolon T1100 Hardware guide

Computherm

Computherm Q20 operating instructions

Heatmiser

Heatmiser neoStat user manual

Aube Technologies

Aube Technologies TH111GFCI-NP 240 VCA user manual

Mars

Mars HEAT CONTROLLER IR Wireless Thermostat user manual

Saswell

Saswell SAS920XWHB-7-S-RF User manual and warranty card

Aircalo

Aircalo TFP1-ET85P2 operating manual

Honeywell

Honeywell CM721 user manual

Carrier

Carrier DEBONAIR 33CS Installation and operating instructions

Lennox

Lennox iHarmony Zone Thermostat Installation and setup guide

Gemtech

Gemtech GT7000 Operation

Rollei

Rollei Smartes 45000 manual

Sinope

Sinope TH1300RF user guide

Honeywell

Honeywell RLV4305 owner's guide

Honeywell

Honeywell Prestige 2.0 THX9421 manual

NuTone

NuTone NTBZ48 Installation & operation guide

Stelpro

Stelpro MAESTRO ASMT402AD user guide