Checkout, Caution, A. b. c – Honeywell CHRONOTHERM T8621A User Manual
Page 17: Fig. 17—mounting thermostat on subbase
17
68-0058—1
T8621A,C,D
INSTALLATION • CHECKOUT
Fig. 17—Mounting thermostat on subbase.
M 843
PM
MORNIMG
MON
HEAT ON
ROOM
SYSTEM
AUTO
PM
MORNIMG
MON
HEAT ON
ROOM
SYSTEM
RUN
PROGRAM
TIME
TEMPERATURE
PRESENT
SETTING
SKIP
NEXT
PERIOD
CHANGE
TO LAST
PERIOD
SET
PRESENT
DAY/TIME
HOLD
TEMP
DAY
SET
HEAT/COOL
CANCEL
PERIOD
COPY
FROM
AHEAD
WARMER
COPY
TO
BACK
COOLER
PERIOD
A.
B.
C.
HEAT A
UTO C
OOL OF
F
ON AUT
O
FAN
HEATING
Move the system switch to HEAT and the fan switch to
AUTO. Press WARMER key until the setting is about 10
°
F [6
°
C] above room temperature. Heating should start
(both stages if multistage), and the fan should run (may be
a short delay on forced air systems). Press cooler key until
the setting is about 10
°
F [6
°
C] below room temperature.
The heating equipment should shut off, followed by the
fan.
NOTE: On an AUTO changeover thermostat, the cooling
temperature must be set at least 3
°
F [2
°
C] above the
heating temperature, or display will flash.
COOLING
CAUTION
Do not operate cooling if outdoor temperature is
below 50
°
F [10
°
C]. Refer to manufacturer’s
recommendations.
NOTE: When cooling setting is changed, thermostat will
wait up to five minutes before turning on the cooling
equipment. This delay is to protect the compressor.
Move the system switch to COOL and the fan
switch to AUTO. Press COOLER key until the setting
is about 10
°
F [6
°
C] Below room temperature. The
cooling equipment and fan should start (both stages if
multistage). Press WARMER key until the setting is
about 10
°
F [6
°
C] above room temperature. The
cooling equipment and fan should stop.
NOTE: On an AUTO changeover thermostat, the heating
temperature must be set at least 3
°
F [2
°
C] below the
cooling temperature, or display will flash.
FAN
Move the system switch to OFF, and the fan switch to
ON. The fan should run continuously. When the fan switch
is in the AUTO position, fan operates directly with the
thermostat call for cooling and also with the thermostat
call for heating.
Checkout
!