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Robertshaw 9505 User Manual

User’s manual, Features, Replacing existing thermostat

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Features

• Milli-volt system compatible

• Low battery indicator.

• Fahrenheit/Celsius display option.

• Adjustable from 45°F (4°C) to 90°F (32°C).

• Accuracy within ±1 degree.

• Adjustable temperature differential: .5 – 1.5 degree.

• 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 90°F (32°C).

Replacing Existing Thermostat

1. Turn off power to heating and cooling system.

2. Remove cover of old thermostat to expose wires.

Do not disconnect wires. (Fig. 1)

3. Label wires per Table 1.

Table 1

Old Label

New Label

Description

M, 4, RH, R5 or R

R

Heat Transformer,
hot side

H, W or 4

W

Heating control

F or G

G

Fan control relay

*NOTE: O

N SOME OLDER MODELS

,

THE

C

TERMINAL CAN BE EITHER THE COOLING CONTROL OR THE

COMMON SIDE OF THE TRANSFORMER

. C

HECK FURNACE WIRING DIAGRAM TO VERIFY

C

TERMINAL

. I

F IT

IS THE COMMON SIDE OF THE TRANSFORMER

,

CAP THE WIRE AND TUCK INTO THE WALL

.

4. After labeling wires, remove wires from terminals.

5. Remove existing thermostat base from wall.

6. Refer to the following section for instructions on how to

install thermostat.

Installing Model 9505 Thermostat

NOTE: F

OR NEW INSTALLATIONS

,

MOUNT THERMOSTAT ON INSIDE WALL

, 4-5

FEET ABOVE THE FLOOR

.

D

O NOT INSTALL BEHIND A DOOR

,

IN A CORNER

,

NEAR AIR VENTS

,

IN DIRECT SUNLIGHT

,

OR NEAR ANY

HEAT OR STEAM GENERATING FIXTURES

. I

NSTALLATION AT THESE PLACES WILL AFFECT THERMOSTAT

OPERATION

.

1. Turn power off to the heating

and cooling systems.

2. Place SYSTEM ON-OFF

In OFF position.

3. Place AUTO-ON

switch

Into AUTO position.

4. Remove the cover using a coin

or screwdriver.

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

wires will feed through opening on base of thermostat.

6. Mark placement of mounting holes. See Fig. 3.

Set base aside.

7. Drill the marked holes using a 3/16" drill bit. NOTE: Enclosed plastic

anchors do not require a drilled hole for drywall.

8. Tap plastic anchors into the wall.

9. Align base with plastic anchors and feed wires

through opening.

10. Secure base to wall with supplied screws.

11. Connect wires to terminal strip. Refer to wiring diagrams on other

side of this sheet. Make sure wire connections are secure.

12. Place fan option switch into either the "ELEC" or "GAS" position

depending upon the type of furnace. Refer to Figure 4

Figure 4

13. Put the °F/°C switch to either °F for Fahrenheit display

or °C for Celsius display readout.

14. Install two “AA” ENERGIZER brand batteries or equivalent into bat-

tery compartment. Be sure to match positive (+) ends of batteries
with positive (+) battery terminals in the battery compartment. The
display will show as follows:

15. Replace cover onto thermostat by snapping into place.

16. Turn on power to system . Test thermostat as described in the fol-

lowing section.

To Test Thermostat

WARNING: DO NOT SHORT (JUMPER) ACROSS TERMINALS OF GAS VALVE OR SYS-
TEM CONTROL TO TEST OPERATION. THIS WILL DAMAGE THE THERMOSTAT AND
VOID YOUR WARRANTY.

1. Place the SYSTEM: ON-OFF

switch into the ON position

2. Press the

button until the

temperature setting is at east
3 degrees above the room
temperature. The heating
system should turn on within
a few seconds.

3. Put the SYSTEM: ON-OFF

switch into the OFF position.
The heating system
should turn off.

4. Put the

AUTO-ON switch

to the ON position. The blower
fan should turn on.

5. Put the

AUTO-ON switch

to the AUTO position. The
blower fan should turn off.

NOTE: Some heat only systems do not have a separate fan control.

Operation

Setting or Changing the Setpoint Temperature

1. Press either the

or

button.

The display will show the current
temperature setpoint.

2. Press either the

or

button

to adjust the temperature setting
either up or down.

The display will return to the room temperature display five seconds after
the last input and the new setpoint will be saved.

Changing Temperature Differential

IMPORTANT: The temperature differential is factory set at 1 (.5°). This
means that whenever the room temperature changes by one half of a
degree from the temperature setting, the system will turn on. If the
system turns on too often, increase the temperature differential.

1. Press

both and buttons

at the same time and hold for one
second. The display will show:

2. Press either the

or

button

to adjust the temperature
differential up or down.

The display will return to the room temperature five
seconds after the last input.

IMPORTANT SAFETY INFORMATION

WARNING:

• Always turn off power at the main power source by unscrewing

fuse or switching circuit breaker to the off position before installing,
removing, cleaning or servicing thermostat.

• Read all of the information in this manual before installing or pro-

gramming this thermostat

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

higher than 30V AC.

• 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

1

2

3

4

5

6

>

>

>

>

>

>

SYSTEM: ON-OFF

AUTO - ON

>

>

SYSTEM: ON-OFF

AUTO - ON

SYSTEM: ON-OFF

AUTO - ON

>

>

>

>

SYSTEM: ON-OFF

AUTO - ON

>

>

>

>

Figure 1

Figure 2

MOUNTING HOLES

ELEC/
GAS SWITCH

°

F/

°

C

Switch

SYSTEM: ON-OFF

SYSTEM: ON-OFF

AUTO - ON

>

AUTO - ON

>

>

1 Heat

W

A R R A N T Y

I N T E G R A T E D C O M F O R T S O L U T I O N S

DIGITAL

NON-PROGRAMMABLE

THERMOSTAT

9505

User’s Manual

Quick Start
Installation and
Programming

110-735

®

ELECTRIC

E

GAS

G

MILLIVOLT

M

Differential

Setting

Degrees

1

.5°

2

1.0°

3

1.5°

110-735B