White Rodgers 1E50N-303 White-Rodgers Mercury Free Mechanical Installation and Operation Instructions (French)

White Rodgers Thermostats Installation and Operation Instructions (French) - 1E50N-303 White-Rodgers Mercury Free Mechanical.
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Do not use on circuits exceeding specifi ed voltage. Higher voltage will 
damage control and could cause shock or fi re hazard.

Do not short out terminals on gas valve or primary control to test. Short or 
incorrect wiring will damage thermostat and could cause personal injury 
and/or property damage.

Thermostat installation and all components of the system shall conform to 
Class II circuits per the NEC code.

Installation Instructions for:
Vertical  

1E50N-303

YOUR THERMOSTAT  REPLACES

System  

      Models

Standard Heat Only Systems

Electric Furnace

Heat Pump (No Aux or Emergency Heat) 

 

1E50N-303

Gas or Oil Heat

Millivolt Heat Only Systems

PREPARATIONS

Assemble tools required: power drill, fl at blade screwdriver, wire cutter/stripper, 
level.

Failure to follow and read all instructions carefully before installing or ope-
rating this control could cause personal injury and/or property damage.

THERMOSTAT FEATURES

Captive

screws

Mounting

Screw

Mounting

Screw

COVER

THERMOSTAT

BASE

WALLPLATE

SWITCHING

SUBBASE

G

W

RH

Mounting

Screw

50

60

70

80

90

50 60

70 80

90

4

Figure 1. Thermostat with subbase or wallplate

To prevent electrical shock and/or equipment damage, disconnect elec-
trical power to the system at the main fuse or circuit breaker until instal-
lation is complete.

CAUTION

!

Before removing wires from old thermostat’s switching subbase, label each wire 
with the terminal designation it was removed from.

1.  Remove old thermostat:  a standard thermostat consists of three basic parts:

A.  The cover, which may be either a snap-on or hinge type.

B.  The base, which is removed by loosening all captive screws.

C.  The switching subbase, which is removed by unscrewing the mounting 

screws that hold it on the wall or adaptor plate.

Make a note here 

 of the anticipator setting on the old thermostat 

for future reference and use in step 5.

The heat anticipator pointer, if adjustable, will be set at one of a series of numbers 
representing the current rating of the primary control in your furnace. The number 
will be one of the following: .2, .4, .8, Etc. Or 0.2, 0.4, 0.8, Etc.

3

REMOVING OLD THERMOSTAT (cont’d)

If  no  heat  anticipator/indication  is  showing,  do  not  be  concerned;  move  on  to  the 
next step.

ATTENTION!  This product does not contain mercury. However, this product may 
replace a unit which contains mercury.

Do not open mercury cells. If a cell becomes damaged, do not touch any spilled 
mercury. Wearing non-absorbent gloves, take up the spilled mercury and place into 
a container which can be sealed. If a cell becomes damaged, the unit should be 
discarded.

Mercury must not be discarded in household trash. When the unit this product is 
replacing is to be discarded, place in a suitable container and refer to www.white-
rodgers.com for location to send product containing mercury.

MOUNTING AND WIRING

WARNING

!

A.  Remove base from subbase or wallplate: Loosen the screws on the base and 

remove.

B.  Mount switching subbase or wallplate: Use the screws provided to mount the 

subbase or wallplate to wall (see Fig. 1).

C.  Attach wires to appropriate terminals: Two wire systems (Heat Only). Attach 

one wire to RH and one to wire W.

D. Mount Thermostat Base: Gently push excess wire back into the wall opening 

and plug hole with a fi re-resistant material, such as fi berglass insulation to pre-
vent drafts from affecting thermostat operation. Mount the thermostat base to 
the subbase or wallplate using the three captive screws on the thermostat base. 
(See Fig. 1) Tighten the screws securely. Proceed to Step #5.

TERMINAL CROSS REFERENCE CHART

 New 

Thermostat 

Other 

Manufacturers’

 

Terminal Designation 

Terminal Designation

 

R H 

R H 

R 5 

R

 W 

W

5

Set anticipator to match the setting of your old thermostat you noted in Step 3, or, the 
anticipator should be set to match the current rating stamped on your main heating 
control. The heat anticipator is adjustable from 0.15 to 1.2 amps. Adjust the antici-
pator by rotating the contact arm (see fi g. 2). The anticipator setting is indicated by 
the numbers on the base that the pointer points to. If you are unsure where to set the 
anticipator contact the heater manufacturer for a recommended setting.

Move the pointer counterclockwise to 
lengthen  
heating system cycles; move 
clockwise to shorten heating cycles. Ad-
justments should not be greater than 1/2 
marking at a time.

For millivolt operation, rotate contact arm to 
Millivolt Link.

Snap on Cover: Carefully align the cover 
with the base and snap the cover onto the 
base.

Rotate contact arm 
to adjust heat anticipator

Arrow points to the 
current rating of 
the primary control

Millivolt Link

PART NO. 37-6973A

0832

White-Rodgers is a division 

of Emerson Electric Co.

www.white-rodgers.com

REMOVING OLD THERMOSTAT

Take care when securing and routing wires so they do not short to adja-
cent terminals or rear of thermostat. Personal injury and/or property da-
mage may occur.

CAUTION

!

SET HEAT ANTICIPATOR

Figure 2. Anticipator adjustment

0.706298s