Furnace Control Panel
5
Furnace operation is automatic; however, the user can manually operate it by changing settings on its control panel.
(See Figure 1 for reference to location of the control panel and circuit breakers on the furnace.)
FIGURE 1
POWER ON Light
This green indicator light illuminates whenever the furnace is energized.
OFFPEAK Light
This red indicator light illuminates during offpeak times which are the times when the furnace is allowed to charge.
(Elements can be "ON" to store heat in the brick core.)
HEAT CALL Light
This yellow indicator light illuminates whenever the furnace is receiving a signal from the wall thermostat to deliver
heat.
ETS CHARGING Light
This red indicator light illuminates whenever the heating elements in the furnace are "ON". (Furnace is storing heat in
its brick core.)
OUTDOOR TEMP SENSOR Lights
These red indicator lights illuminate to designate the brick core charge level the furnace is targeting whenever the
elements are allowed to be "ON". (Refer to Table 1, Brick Core Charging Schedule, in this manual for more informa
tion on charging levels in relation to outdoor temperature and the furnace control panel settings.)
LEVEL 1 = Illuminates when the furnace is targeting a heat storage setting of approximately 1/3 core charge
(500
o
F, nominal) or greater.
LEVEL 2 = Illuminates when the furnace is targeting a heat storage setting of approximately 2/3 core charge
(900
o
F, nominal) or greater.
LEVEL 3 = Illuminates when the furnace is targeting its maximum heat storage setting (1350
o
F, nominal).
All outdoor temperature sensor lights will be illuminated when the furnace is targeting
its maximum heat storage setting.
FURNACE CONTROL
TE
M
P S
EN
SO
R
O
U
T
D
O
O
R
OVERRIDE
START
SUMMER
WINTER
CANCEL
HIGH
LOW
LEVEL 3
LEVEL 2
AUTO
PANEL
ETS CHARGING
HEAT C ALL
OFF PEAK
POWER ON
LEVEL 1
CIRCUIT BREAKERS
CIRCUIT BREAKER
BLOWERS/FURNACE CONTROLS
CORE CHARGING (ELEMENT)
SUPPLY AIR BLOWER
PLENUM ASSEMBLY
WITH HEAT EXCHANGER
FURNACE BASE
NOTE
