White Rodgers 350 - Manual (Page 3)

SET HEAT ANTICIPATOR
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 fig. 5). 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. Adjustments
should not be greater than 1/2 marking at a time.
Snap on Cover: Carefully align the cover with the base and snap
the cover onto the base.
NEW THERMOSTAT OPERATION
This thermostat is easy to operate. Fig. 6 shows how the heating/
cooling system and fan operate when the switches are in various
positions. Use the system switch to select either heating or
cooling, or to turn the heating/cooling system off. Use the fan
switch to control fan operation. When the fan switch is in the
AUTO position, the fan will cycle with the heating or cooling
system (the fan will not run if the system switch is in the OFF
position and the fan switch is in the AUTO position). When the fan
switch is in the ON position, the fan will run continuously, regard-
less of system switch position (even if the system switch is set to
OFF, the fan will run if the fan switch is in the ON position).
ELECTRICAL DATA
Switch Rating ........................ 24 VAC (30 VAC max.)
Heating .................................... 0.15 to 1.2 Amps
Cooling .................................... 0 to 1.5 Amps
Switch Action ........................ SPST – Sealed mercury switch
Anticipator Rating:
Heating .................................... Adjustable from 0.15 to 1.2 Amps
Cooling .................................... Fixed
SPECIFICATIONS
THERMAL DATA:
Temperature Range .............. 50
°
F to 90
°
F (10
°
C to 32
°
C)
Operating Humidity Range ... 0 – 90% noncondensing
24VAC
50/60 Hz
.35 Amps
Typical Zone Valve
24VAC
50/60 Hz
.23 Amps
Typical Gas Valve
24VAC
50/60 Hz
.43 Amps
Typical Oil Primary
www.white-rodgers.com
5
6
7
.18
.25 .3
.4
.2
.15
1.
.8
.6
.5
Arrow points to the
current rating of the
primary control
Move this lever to
adjust heat
anticipator
Figure 5. Anticipator adjustment
L
O
N G E R
C
Y
C
L
E
S
FAN
AUTO ON
SYSTEM
COOL OFF HEAT
Shows switch position
OPERATION
No heating; no cooling; no fan
No heating; no cooling; fan runs continuously
Cooling system cycles from thermostat; fan runs
continuously
Cooling system and fan cycle from thermostat
Heating system cycles from thermostat; fan cycles
from fan control on furnace
Heating system cycles from thermostat; fan runs
continuously
Figure 6. Subbase switching and thermostat/system operation