- INSTRUCTIONS —
TYPE 1D51 and 1F51
Low Voltage
COOLING ASTRO*STATS
with Sub-Base for System and Fan Selection
These low voltage thermostats are designed for operation of to provide for narrow differential control of room
the cooling system. A selector switch provides convenient temperature. Models are available with either sealed mercury
selection of cooling system and blower operation. These contacts, or with snap-action contacts.
thermostats are equipped with a fixed type cooling anticipator
Str r——————— SELECTING THERMOSTAT LOCATION armas mmm mm——
The proper location of the room thermostat is most important 5. Avoid locations close to radiators, warm air registers, or in
to insure that it will provide a comfortable home temperature. the direct path of heat from them.
Observe the following general rules when selecting a location:
1. Locate it about 5 ft. above the floor. 6. Make sure there are no pipes or duct work in that part of
the wall chosen for the thermostat location.
2. Install it on a partitioning wall, not on an outside wall. 20. .
7. Never locate it in a room that is warmer or cooler than the
3. Never expose it to direct light from lamps, sun, fireplaces, rest of the home, such as kitchen or hallway.
etc. . . .
8. The living or dining room is normally a good location,
4. Avoid locations close to doors that lead outside, windows, provided there is no cooking range or refrigerator on
or adjoining outside walls. opposite side of wall.
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Attaching Sub-Base to Wall
1. Route wires from cooling equipment to thermostat location
and pull wires through hole in wall so that 6 in. of cable
protrudes,
2 Puli wires through opening near center of sub-base and
connect wires beneath proper terminals screws as shown
under “wiring”.
3, Push excess wire into wal! or switch box and plug up hole
to prevent drafts from affecting thermostat operation.
4. Fasten sub-base loosely to wall in position shown in Fig. 1
using two mounting screws provided. Level sub-base by
placing spirit level on top of sub-base. Tighten mounting
screws to secure sub-base in level position.
|
. SUB-BASE
Mounting Thermostat to Sub-Base
1. Remove cover from thermostat by pulling it straight
outward.
THERMOSTAT BASE
2. Attach thermostat base to sub-base, being sure that all
screws are tightened snugly since they serve as electrical FIG. 1
connections between thermostat and sub-base.
3. Snap on thermostat cover and set thermostat to desired
setting.
COOLING ANTICIPATION =-———— pop pr a re
This thermostat is equipped with a fixed non-removable
heater. It is for use on current draws from 0 to 1.5 Amp.
WHITE-RODGERS DIVISION
=
EMERSON ELECTRIC CO.
=
||
9797 REAVIS ROAD Printed in U.S.A, PART No. 37-2223
ST. LOUIS. MISSOURI 63123
== OPERATION vamo —.e—];]—]———] END re
Position Overati
Of Switch peration
FAN AUTO Both blower and cooling system cycle from thermostat.
SYSTEM OFF { Neither blower nor cooling system will operate.
FAN ON Blower runs continuously. Cooling system cycles from
thermostat.
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AN wiring should be done according to local and national electrical codes and ordinances.
This wiring diagram shows connections for a typical system.
Always refer to any specific wiring instructions provided by
the equipment manufacturer.
These thermostats have been carefully adjusted at the factory
and should not require re-calibration.
A few degrees difference between the indicator setting of the
thermostat and actual room temperature is not considered
important. If the disagreement is appreciable, however, first
make sure that the thermostat is properly located and leveled.
Then, if 2 ibration still seems necessary, proceed as
follows:
These instructions apply for cooling models, with either sealed
mercury or snap-action contacts.
1. Move temperature adjustment lever to a setting about 59
below room temperature.
2. Remove thermostat cover. Slip standard 7/32" wrench onto
hex nut beneath bimetal, and, holding temperature
adjustment lever stationary, turn hex nut counterclockwise
until mercury shifts to left end of tube (or until movable
contact closes against magnet on snap-action types.)
3. Remove wire from terminal on thermostat or wall
mounting plate to take cooling anticipator out of circuit.
4. Replace thermostat cover. Wait 10 minutes for bimetal
temperature to stabilize. Don’t stand near thermostat
during this period as your breath and body heat will affect
temperature of bimetal.
5. Move temperature adjustment lever to correspond to actual
room temperature. Then remove thermostat cover.
- CALIBRATION ADJUSTMENT
THERMOSTAT
оо CONTACTS
COOLING
ANTIC.
OFF
— AUTO ON
| } } 2243
| TT 0000 -
COOLING FAN
24V, LINE
SYSTEM RELAY |
|
ee — ——— A
TEMPERATURE ADJUSTMENT LEVER
BIMETAL I
STANDARD 7/32” WRENCH
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Slip standard 7/32” wrench onto hex nut and holding
temperature adjustment lever stationary, turn hex nut
clockwise until mercury just barely shifts to right end of
tube (or until movable contact just moves off of magnet on
snap-action types.)
7. Replace wire removed in step 3. Then replace thermostat
cover and set thermostat to desired temperature.
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