Robertshaw 9405 Manual de usuario

DIGITAL

NON-PROGRAMMABLE

THERMOSTAT

9405

ELECTRIC

GAS

MILLIVOLT

NeW

1 Heat

User's Manual

Quick Start

Installation

Application

The Robertshaw 9405 is a single-stage thermostat designed to control

24 VAC gas, electric, or millivolt heating systems.

Features

•Low battery indicator

•Large back lit display

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

•Accuracy within ±1°

•Fahrenheit/Celsius display option

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

•Quick wire terminal block

•Low temperature freeze protection. While in heat mode, thermostat

will mechanically turn on heat if temperature drops to 40°F (4°C)

even if batteries are missing or drained.

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

110-1042

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 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,R,Rh,R5 or 5 R Heat transformer, hot side

H,W, or 4 W Heating control

F or G G Fan control relay

NOTE: ON SOME OLDER MODELS, THE C TERMINAL CAN BE EITHER THE COOLING CONTROL

OR THE COMMON SIDE OF THE TRANSFORMER. CHECK FURNACE WIRING DIAGRAM

TO VERIFY C TERMINAL. IF IT IS THE COMMON SIDE OF THE TRANSFORMER, CAP

THE WIRE AND TUCK INTO THE WALL.

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 9405 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 system.

2. Place HEAT-OFF 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.To change 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

Label

Figure 5

120 VAC

24 VAC

Transformer

Hot

HEATING

CONTROL

FAN

CONTROL

HEATING

CONTROL

120 VAC 24 VAC

Transformer

Hot

TT PP

PP T N

Gas valve

Pilot

Generator

◆Wiring Diagrams

HEAT ONLY

2-WIRE

SINGLE TRANSFORMER

HEAT ONLY

3-WIRE

SINGLE TRANSFORMER

250-750

MILLIVOLT

SYSTEM

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. Install two AA Energizer brand batteries or equivalent into

battery compartment as shown (Figure 6).

17. Replace thermostat cover by snapping into place.

RESET

NON-HP HP

ELECGAS

ROOM

°F

OFF

GAS/ELECTRIC

Switch

Figure 6

TERMINAL LEGEND - 9405

TERM EQUIPMENT TO CONNECT REQ? TERMINAL FUNCTION

R24VAC hot connection Yes For input of 24VAC hot

side of heat transformer

WHeat connection Yes* Energizes on a call for

heating

GIndoor fan connection Yes Energizes with W

terminal or with FAN

option switched to the

ON position

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.

1. Put the HEAT-OFF switch into

the HEAT position. The display will read HEAT.

2. 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.

3. Put the HEAT-OFF switch into

the OFF position. The heating system should

turn off. The fan may continue to run for a

short period of time.

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

position. The blower fan should turn on.

The display will show a and ON.

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

position. The blower fan should turn off.

Step 4: Customizing the Thermostat

◆Settings

System

Off: The heating system is 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.

ROOM

°F

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

°F

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).

Display is blank, flashing or

constant LOW BATT. Replace batteries.

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).

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