Protection For The Appliance - A.O. Smith SGE Installation And Operation Manual

gis
Legend
A = Gas burner on
B = Gas burner off
T :
net
• = no heat demand, so water
not heated
• = water heated via solar
heating system
• = water heated via solar
heating system and gas burner
t = time
T = Temperature
o
45 C = Minimum tap water
temperature
2.4 Protection for the
appliance
2.4.1
Instruction manual SGE
• Hysteresis
The moment T falls below (T
net
registers such a heat demand that the gas burner and the solar heating
system jointly heat the water. The solar heating system is only employed
when the temperature measured by S
than that of S .
2
• T
solar diff
When T exceeds (T
net set
is heated exclusively by the solar heating system. When T
T (provided = T
set Tset solar limit
value of T is adjustable
solar diff
• T
solar limit
Preset (12.9.4 "Setting the solar limit temperature")
which heating via the solar heating system is stopped.
•
Graphical representation of heating cycle
T
solar limit
T
set
Solar diff.
Hys.
T
min = 45 C
Note
T can rise above T
net set
increased via the service menu.
Note
T can be lower than T
solar limit
to T .
set
Introduction
The electronic controller monitors the water temperature, helps ensure the safe
use of the solar heating system, and ensures safe combustion. This takes place
using:
• the Appliance water temperature protection
• the Gas valve
• the Fan
• the Pressure switch
• the Flame probe
- T - Hysteresis), the controller
set solar diff
is a certain (adjustable) value grater
1
- T ), the gas burner is shut off and the water
solar diff
), the solar heating system switches off. The
(12.9.5 "Setting the solar
,. However, this is only possible if T
; this will mean that T
set
rises above
net
difference").
water temperature at
is
solar limit
can never be equal
net
15