Removing Old Thermostat; Mounting And Wiring - White Rodgers 1F78 Installation Instructions Manual

3

REMOVING OLD THERMOSTAT

CONTINUED FROM FIRST PAGE
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 con-
tainer and return to White-Rodgers at 2895 Harrison Street, Bates-
ville, AR 72501-2117 for proper disposal.
4

MOUNTING AND WIRING

!
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.
Electric Heat or Single-Stage
Heat Pump Systems
This thermostat is confi gured from the factory to operate a heat/
cool, fossil fuel (gas, oil, etc.), forced air system. It is confi gured
correctly for any system that DOES NOT require the thermostat
to energize the fan on a call for heat. If your system is an electric
or heat-pump system that REQUIRES the thermostat to turn on
the fan on a call for heat, locate the GAS/ELECTRIC switch (see
fi g. 1) and switch it to the ELECTRIC position. This will allow the
thermostat to energize the fan immediately on a call for heat. If you
are unsure if the heating/cooling system requires the thermostat
to control the fan, contact a qualifi ed heating and air conditioning
service person.
Hydronic (Hot Water or Steam)
Heating Systems
This thermostat is set to operate properly with a forced-air heating
system. If you have a hydronic heating system (a system that heats
with hot water or steam), you must set the thermostat to operate
properly with your system.
The factory default setting is forced air heat. Clipping jumper W905
on the circuit board will produce a longer heating cycle which is
normally for hot water or steam (hydronic) systems. Both settings
produce a very accurate temperature control and can be set to your
personal preference. As received, the thermostat cycles the system
just under 1°F. With W905 clipped, the system cycles at approxi-
mately 1.5°F.
WARNING
www.white-rodgers.com
CAUTION
!
Take care when securing and routing wires so they do not
short to adjacent terminals or rear of thermostat. Personal
injury and/or property damage may occur.
TERMINAL CROSS REFERENCE CHART
New Thermostat
Terminal Designation
RH
RC
G
W
Y
* These are four-wire, single-transformer systems.
Factory installed jumper wire between the RH
and RC terminals must remain in place.
Energy Management Recovery (EMR)
This thermostat is set to operate with EMR. This causes the
thermostat to start the heating or cooling system early to have
the room temperature reach the program setpoint at the time
the period is to start.
To disable EMR, clip jumper W903 (see Fig. 1).
Attach Thermostat Base to Wall
1. Remove the packing material from the thermostat. Gently pull
the cover straight off the base. Forcing or prying on the ther-
mostat will cause damage to the unit. If necessary, move the
electric heat switch (see ELECTRIC HEAT SYSTEMS, above).
2. Connect wires beneath terminal screws on base using appro-
priate wiring schematic (see fi gs. 2 through 7).
3. Place base over hole in wall and mark mounting hole locations
on wall using base as a template.
4. Move base out of the way. Drill mounting holes.
5. Fasten base loosely to wall, as shown in fi g. 1, using two mount-
ing screws. Adjust until level, and then tighten screws. (Leveling
is for appearance only and will not affect thermostat operation.)
If you are using existing mounting holes, or if holes drilled are
too large and do not allow you to tighten base snugly, use plas-
tic screw anchors to secure subbase.
6. Push excess wire into wall and plug hole with a fi re-resistant
material (such as fi berglass insulation) to prevent drafts from
affecting thermostat operation.
Battery Location
This thermostat requires 2 "AAA" alkaline batteries to operate. If
"LO BATTERY" is displayed, the batteries are low and should be
replaced. For best results, replace batteries once a year with new
premium brand alkaline batteries such as Duracell
To replace the batteries, install the batteries along the top of the
base (see fi g. 1). The batteries must be installed with the posi-
tive (+) ends to the right.
Other Manufacturers'
Terminal Designation
* *
4 RH M R5 R
R R V - -
G G F G G
W W H 4 W
Y Y C Y6 Y
® or Energizer ® .