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Rheem II Series User Manual
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TM090 12-26 Series II CFGWH Service Instructions
REV
AB
–
Issued February
201
9
This document is s
tored and maintai
ned electronic
ally by Rheem
Technical Su
pport. All printed c
opies
are de
emed “uncontrolled
”
23
OPERATIONAL FLOW CHARTS
Pl
ug In
Powe
r
O
n
1
G
as t
ype c
ontr
ol
da
ta fai
lur
e
G.I
.S.
V
.
Con
tr
o
l
failur
e
82
Flas
hin
g
73
Flas
hing
Err
or c
od
e c
l
e
ared
Is
olat
e P
o
wer
Remo
te c
ont
r
ol
l
er
s
wi
tched
on
Remo
te c
ont
roller
s
wi
tc
hed
off
Remo
te c
ont
r
oller
di
splay
off
Remo
te cont
r
oller
LE
D di
s
pl
ay o
n
On
/O
ff la
mp Off
On
/Of
f la
m
p On
Fa
n O
n
Fa
n O
ff
10
s
econ
ds
l
ater
5
B
W
ater
Flow S
en
s
or
off
Hot w
ater tap
c
los
e
d
Hot w
ater tap
ope
n
2
3
YES
24
Fla
s
hi
n
g
NO
15
s
econ
ds
l
ater
Fa
n O
n
Fa
n
On
4
NO
YES
1
A
YES
71
Fla
s
hi
n
g
Ve
nt t
y
pe
c
on
trol
data
fai
l
u
re
Fa
i
l
u
re o
f dete
c
t
i
on
of fa
n mo
tor
c
urr
en
t
79
Flas
hing
34
Flas
hing
14
Fla
s
hi
ng
74
,
75
o
r
76
Flas
h
i
ng
O.H
.L
.
W
ork
i
ng
Am
bi
en
t ai
r
ther
mi
sto
r
di
scon
nec
te
d
Comm
uni
ca
ti
on
trou
bl
e
betwe
en the rem
ote
c
ontrol
l
er and
he
ater
NO
8
E
31
Flas
hing
32
Flas
hing
33
Flas
hing
YES
34
Fla
s
hi
n
g
4
61
Fla
s
hi
ng
NO
15
s
econ
ds
l
ater
YES
9
72
Fla
s
hi
ng
NO
5
s
econ
ds
la
ter
Lea
k
ag
e
<
t
han
0.1
uA
NO
Wa
ter
Inl
et
Heat
E
x
c
ha
nge
r
Am
bi
en
t A
i
r
Hot W
ate
r
Ou
tle
t
NO
NO
52
Fla
s
hi
ng
90
Fla
s
hi
ng
YES
YES
2
YES
P.G
.F
.R
.
V
al
ve Ma
x
.
10
F2
Ini
tial c
heck
nor
mal?
Input te
m
p not
mor
e than s
et temp
(Max
58
ºC
)
-
10
~-
2
ºC
?
Wa
ter
fl
ow
s
enso
r
O
N?
Max
&
Mi
n
butto
ns
o
ff?
YES
Th
er
mi
s
t
or
OK
?
Fa
n s
pee
d
nor
mal?
P.G
.F
.R
.
Contr
ol
failur
e
Dec
re
as
e i
n
fan v
en
ti
l
ati
on
No fa
l
s
e
fl
ame
detec
t
ed?
F1
F
F
G
5
6
7
8
G
A
Note: see page
22
for details on interpreting chart abbreviations
22
24
Table of Contents
Table of Contents
2
Introduction
3
Safety Warning
3
Live Testing
3
Touch Voltage Testing
4
Water Heater Model Identification
5
Specifications
5
Wiring Diagram
8
Preset Temperature Adjustment
9
Fine Temperature Adjustment
9
Sequence of Operation
10
Anti-Frost Heater Circuit
12
In-Series Gas Boosting
12
Tempering Valves
13
Remote Controllers
14
Bath Fill Operation
19
How to Fault Find
21
Operational Flow Charts
23
Error Codes
26
Diagnostic Test Points
27
Maintenance Information
28
Clearing Error Code History
30
Resetting Error Codes
31
Test Equipment
31
Fault Finding
32
Fault Diagnosis Sequence
38
Fault Finding Chart 1
39
Fault Finding Chart 2
40
Fault Finding Chart 3
41
Fault Finding Chart 3.1
42
Fault Finding Chart 3.2
43
Fault Finding Charts 3.3 & 3.5
44
Fault Finding Chart 3.6
45
Fault Finding Chart 3.7
46
Fault Finding Charts 4 and 4.1
46
Fault Finding Chart 5
47
Eziset Fault-Finding
48
Burner Gas Pressure Check
50
Component Replacement Procedures
52
Document Revision History
60
5
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Rheem II Series Specifications
General
Category
Water Heater
Series
II Series
Type
Electric
Energy Factor
0.95
Voltage
240V
Wattage
4500-5500W
Warranty
6 years
Diameter
22 inches
Capacity
40-80 gallons
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