Robertshaw 9505 User Manual

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 pro­gramming 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

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SYSTEM: ON-OFF

AUTO - ON

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MOUNTING HOLES

AUTO - ON

1 Heat

W

A

R

R

A

N

T

Y

INTEGRATED COMFORT SOLUTIONS

™

DIGITAL
NON-PROGRAMMABLE
THERMOSTAT

9505

User’s Manual

Quick Start
Installation and
Programming

110-735

®

ELECTRIC

E

GASGMILLIVOLT

M

110-735B

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: 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. IFIT

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.

SYSTEM: ON-OFF AUTO - ON

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SYSTEM: ON-OFF

AUTO - ON

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Figure 1

MOUNTING HOLES

AUTO - ON

Installing Model 9505 Thermostat

SYSTEM: ON-OFF AUTO - ON

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SYSTEM: ON-OFF

AUTO - ON

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MOUNTING HOLES

AUTO - ON

NOTE: FOR NEW INSTALLATIONS, MOUNT THERMOSTAT ON INSIDE WALL, 4-5 FEET ABOVE THE FLOOR.
DONOT INSTALL BEHIND A DOOR, IN A CORNER, NEAR AIR VENTS, IN DIRECT SUNLIGHT, OR NEAR ANY

HEAT OR STEAM GENERATING FIXTURES
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.

. INSTALLATION AT THESE PLACES WILL AFFECT THERMOSTAT

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

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

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

Figure 2

wires will feed through opening on base of thermostat.

Set base aside.

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.

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AUTO - ON

ELEC/
GAS SWITCH

°F/°C
Switch