Robertshaw 300-203 Owner's Manual download pdf (Page 2)

USER CONTROLS (CONT)

OUTDOOR (ODT) BUTTON

If your thermostat has been installed with an electronic outdoor

remote sensor (Uni-Line Part #529), you may view the outdoor

temperature simply by pressing the OUTDOOR button. Upon

releasing the button, the thermostat will once again display the

indoor temperature. If the option is not connected, the thermostat

will display



---.

DAY/NIGHT BUTTON 

When the thermostat is initially installed, the display will show the

symbol for your day temperature. By pressing the DAY/NIGHT

button you may select an alternate or night temperature



(the

thermostat will remember this setpoint). Simply press the

DAY/NIGHT button to alternate between temperature settings.

CELSIUS / FAHRENHEIT

Simultaneously press  and  to switch between Celsius (C) and

Fahrenheit (F) temperature display.

REMOTE SENSOR (OPTION)

RS1 – RS2 – RS+V

The thermostat is designed to accept the electronic remote sen-

sor (Uni-Line Part #528) which will allow you to locate your ther-

mostat in an area away from view. Indoor and outdoor sensors

are available separately.

CLOCK TERMINALS (OPTION) CLK1 – CLK2

Your thermostat is equipped with a dry contact closure input. By

connecting to any relay-based controller or clock timer (DSP-AT

or equivalent), the thermostat can be alternated between the

DAY/NIGHT (setback) temperature setpoints automatically.

Upon initial power up of the thermostat or after a power failure,

the thermostat will check the clock terminals and apply the DAY

(open contact) or NIGHT (closed contact) temperature setpoints

accordingly.

TEMPERATURE ACCURACY

Full temperature accuracy will only be realized after the thermo-

stat has been installed and powered for at least one (1) hour.

POWER FAILURES

Your thermostat employs the latest in solid state electronic

technology.

One of the unique features of your thermostat is that there is no

battery required to maintain your selected setpoints in the event

of a power loss as the memory is unaffected by power failures of

any duration.

When power is restored, the thermostat will continue operating as

if the power had never been off.

INSTALLATION INSTRUCTIONS

LOCATION

To ensure proper operation, the thermostat should be mounted on

an inside wall in a frequently occupied area of the building. In

addition, its position must be at least 18" (46cm) from any outside

wall, and approximately 5' (1.5m) above the floor in a location

with freely circulating air of an average temperature. You should

avoid the following locations:

– behind doors or in corners where freely circulating air is

unavailable;

– where direct sunlight or radiant heat from appliances might

affect control operation;

– on an outside wall;

– adjacent to, or in line with, conditioned air discharge grilles,

stairwells, or outside doors;

– where its operation may be affected by steam or water pipes or

warm air stacks in an adjacent partition space, or by an area

behind the thermostat which is not climate controlled;

– where its operation will be affected by the supply air of an adja-

cent climate control HVAC device; and

– near sources of electrical interference such as arcing relay

contacts.

REMOVING THE THERMOSTAT FROM THE SUBBASE

1. Insert a flat blade screwdriver or a coin 1/8" into the

slot located in the bottom center of the thermostat

case and twist 1/4 turn. When you feel or hear a “click,”

grasp the case from the bottom two corners and separate from

the subbase. Some models require more force than others

when separating due to the number of terminals used.

2. Swing the thermostat out from the bottom.

3. Lift the thermostat up and off the subbase.

4. Place the rectangular opening in the subbase over the equip-

ment control wires protruding from the wall and, using the sub-

base as a template, mark the location of the two mounting

holes (exact vertical mounting is necessary only for appear-

ance).

5. Use the supplied anchors and screws for mounting on drywall

or plaster; drill two 3/16" (5mm) diameter holes at the marked

locations; use a hammer to tap the nylon anchors in flush to

the wall surface and fasten subbase using the supplied screws.

(Do not overtighten!)

6. Connect the wires from your system to the thermostat termi-

nals. Carefully dress the wires so that any excess is pushed

back into the wall cavity or junction box. Ensure that the wires

are flush to the plastic subbase. The access hole should be

sealed or stuffed to prevent drafts from the wall affecting the

thermostat.

7. Before the thermostat is reinstalled on the subbase, install the

optional clock/timer, indoor remote sensor and outdoor remote

sensor, if used. Refer to the installation instructions supplied

with each option. Also check the position of the DIP switches

on the back of the thermostat.

CAUTION

THIS DEVICE SHOULD BE INSTALLED BY A

QUALIFIED TECHNICIAN WITH DUE REGARD

FOR SAFETY, AS IMPROPER INSTALLATION

COULD RESULT IN A HAZARDOUS CONDITION

INSTALLATION INSTRUCTIONS (CONT)

REPLACING THE THERMO-

STAT ON SUBBASE

1. Position the thermostat on the

hinged tabs at the top of the

subbase.

2. Gently swing the thermostat

down and press on the bottom

center until it snaps into place.

THERMOSTAT COVER LOCK

You may lock the cover down to

prevent unauthorized access to

the thermostat by adding the

plastic lock (included in the instal-

lation bag). Insert the plastic lock

piece into the bottom of the

mounted base. The ends of the

lock piece fit snugly under the

lock pins extending from the bot-

tom of the mounted base. The

tab in the middle of the lock piece

extends down from the base.

To release the locking mecha-

nism, press the lock piece up and

into the base while gently prying

open.

THERMISTOR MOUNTING INSTRUCTIONS

When placing the front cover on the thermostat ensure the

thermistor is not bent or misaligned.

Ensure that the thermistor does not touch the thermostat case.

The thermistor should be placed horizontal to the wall. Ensure the

thermistor is not pushed upward into the case.

The thermistor should be aligned so it is visible between the ribs

on the bottom of the subbase.

Outside rear view with backplate closed

WIRING DIAGRAM

Notes about the wiring diagram

• The Wiring Diagram shows how the R and 24V terminals are connected

when the shunt is in place and the thermostat and subbase are

snapped together. The dotted lines show the factory-supplied internal

connections.

• If the 24V(c) is not available from the equipment, the shunt may be

removed and a separate 24V transformer must then be used to power

the thermostat. To remove jumper (labeled JP1) from the printed circuit

board, pull straight out.

• This thermostat may be used with 24 Volt DC. The negative side of the

DC supply must be wired to the 24V (c) terminal.

TERMINAL DESIGNATIONS

W2 .............Energizes on a call for 2nd stage heating

Y2 ..............Energizes on a call for 2nd stage cooling

W1 .............Energizes on a call for 1st stage heating

Y1 ..............Energizes on a call for 1st stage cooling

G ................Fan operates with a call for heating or cooling or by

pressing the FAN button.

R ................Power from equipment

24V ............24 VAC hot and common to power the thermostat

24V(c)

RS2............Use to connect up to 6 (SL-IDS) indoor and/or 1

RS1 (SL-ODT) outdoor remote sensor/s.

RS+V When connected the thermostat will automatically use

the SL-IDS temperature sensor and not its own.

Refer to the instructions included with the sensor.

LED1..........Free lights for status or function indication

LED2

CLK1 .........Use with dry contact relay or DSP-AT for alternate

CLK2 setpoints

300-203

(for Release 3)

CAUTION

Power is supplied through the thermostat to the

remote devices. DO NOT connect any other 24V

source to the remote devices.

1 2

Comments to this Manuals

No comments

Robertshaw 300-203 Owner's Manual Page 2

Comments to this Manuals

Related products and manuals for Thermostats Robertshaw 300-203