Robertshaw 9405 User manual

DIGITAL
NON-PROGRAMMABLE
THERMOSTAT
9405
ELECTRIC
E
GAS
G
MILLIVOLT
M
®
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)
1
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
2
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.
3
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
TM
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.
4
RESET
NON-HP
Mounting Holes
Wiring Opening
HP
ELECGAS
Figure 4
W
R
G
Label
G
Figure 5

5
R
W
G
T
H
E
R
M
O
S
T
A
T
120 VAC
24 VAC
Transformer
Hot
HEATING
CONTROL
R
W
G
T
H
E
R
M
O
S
T
A
T
FAN
CONTROL
HEATING
CONTROL
120 VAC 24 VAC
Transformer
Hot
R
W
G
T
H
E
R
M
O
S
T
A
T
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.
6
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

7
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.
8
ROOM
°F
OFF
Figure 7

9
◆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: [phone]
Monday-Friday 7:30 AM - 5:30 PM CST
10
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).

Two Year Limited Warranty
Maple Chase warrants to the original contractor installer, or to the
original consumer user, each new Robertshaw thermostat to be free from
defects in materials and workmanship under normal use and service for a
period of two (2) years from date of purchase. This warranty and our
liability does not apply to batteries or merchandise that has been
damaged by misuse, neglect, mishandling, alterations, improper
installation, or use in a way other than in accordance with Maple Chase
recommendations and instructions.
Maple Chase agrees to repair or replace at its option any thermostat
under warranty provided it is returned within the warranty period, postage
prepaid, with proof of the date of purchase. Cost of thermostat removal or
reinstallation is not the responsibility of Maple Chase.
Repair or replacement as provided under this warranty is the exclusive
remedy of the consumer. Maple Chase shall not be liable for any
incidental or consequential damages for breach of any express or implied
warranty on this product, or under any other theory of liability. Except to
the extent prohibited by applicable law, any implied warranty of
merchantability or fitness for a particular purpose on this product is limit-
ed to the duration of this warranty.
Some states do not allow the exclusion or limitation of incidental or con-
sequential damages, or allow limitations on how long an implied warranty
lasts, so the above limitations or exclusions may not apply to you. This
warranty gives you specific legal rights, and you may also have other
rights which vary from state to state.
For warranty returns, send thermostat, shipping prepaid to:
Uni-Line North America
Warranty Claims Department
515 S. Promenade
Corona, CA 91719
©2002 Maple Chase 110 -1042
11
Maple Chase
191 E. North Avenue
Carol Stream, Illinois 60188
United States of America
TM

NOTES
12