DORCHESTER DR-FC 25, Installation, Commissioning And Maintenance Instructions

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Introduction
Instruction Manual DR-FC 11
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2 Functioning of the
water heater
2.1 Introduction
Topics covered in this chapter:
•
Functional description of the water heater ;
• The water heater’s heating cycle ;
• Protection for the water heater ;
• Safety of the installation .
2.2 Functional
description of the
water heater
Figure 2.1 shows a cut-away view of the water heater.
Legend
a
top cover
b
hot water outlet
c
electrical connection block
d
control panel
e
pressure switch
f
control panel
g
temperature sensor T
1
h
combustion chamber
i
anode
j
heater
k
heat exchanger
l
inspection and cleaning
opening
m
temperature sensor T
2
n
cold water inlet
o
drain valve
p
gas control
q
burner
r
fan
s
air supply hose
t
hot surface igniter
u
flame probe
v
chimney pipe
w
siphon
x
PU insulation layer
IMD-0393
Figure 2.1 Cut-away view of the water heater
k
i
a
p
c
e
u
b
o
r
x
q
h
f
d
j
n
t
v
w
s
g
l
m
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