White Rodgers 1F58 - Manual (Page 4)

4
ATTACH THERMOSTAT TO SUBBASE
1. Remove cover from thermostat base by gripping the
base in one hand and with the fingers of the other
hand, pull lightly at the top or bottom of the cover.
2. Carefully remove the shipping protective packing
from the mercury switches.
3. Attach thermostat base to subbase. Be sure that all
captive screws are tightened snugly, because they
serve as electrical connections between thermostat
and subbase (see fig. 4).
4. Snap cover onto thermostat and set temperature
lever to desired setpoint. Turn on electrical power.
OPERATION &
MAINTENANCE
The chart below shows the how the system functions when
the system and fan switches are in various positions.
OFF AUTO ON
FAN SYSTEM
COOL HEAT
G
R
Y
Figure 3. Thermostat subbase
EMER.
W2
Mounting screw KEEP THIS AREA
CLEAR OF WIRES!
Hole
in wall
Mounting screw
X1
E
O B
Figure 4. Attach thermostat to subbase
Cover
Thermostat
Subbase
Captive terminal
screws
Captive terminal
screws
Mounting
screws
50
60
70
80
60
50 70
80
90
90
OFF
FAN AUTO
ON
SYSTEM COOL
HEAT
G
O
B
B
B
B
B
O
G
Compr.
Contact
SUBBASE SWITCH POSITIONS SYSTEM FUNCTION
COMPONENT OPERATION
Emer
Heat
Relay
Rev
Valve
Fan
Relay Auto On Cool Off Heat Emer
FAN SYSTEM
No heat - no cool - no fan.
Heat Mode: stage 1 calling. Fan relay and com-
pressor contactor energized by thermostat.
Heat Mode: both stages calling. Fan relay, com-
pressor contactor, and auxiliary heat relay are
energized.
Emergency Heat Mode: stage 1 calling. Emergency
heat relay energized. Compressor locked out at
thermostat.
Emergency Heat Mode: both stages calling. Emer-
gency and auxiliary heat relays energized. Compres-
sor locked out at thermostat.
Cool Mode: Compressor contactor and fan relay
energized.
Indicates switch position on thermostat subbase
and system function at those switch positions.
Aux
Heat
Relay
G
Fan relay energized. Fan runs continuously,
regardless of system switch position.
Reversing valve energized if connected to B terminal.
Reversing valve energized if connected to the O terminal.
See fig. 2 (fan caution)