Tankless Water Heater
Service Manual
Key to Trade Names in this Manual:
R/C
Indicates both the residential and
commercial versions. R/C42e includes
R42e and C42e.
RC
Indicates condensing water heater models.
(PLUS) Indicates that the Designer Plus models are
included. R/C85ePLUS includes R85e,
C85e, and R85ePLUS. On the side of the
water heater, the trade name includes a
“D”, as in R85De.
(ASME) Indicates that the ASME models are
included. R98LSe(ASME) includes the
R98LSe and R98LSeASME.
-VA,-VB The trade names R75LSe, R75LSi,
R94LSe, and R94LSi have been given to
both the VA and VB series of water
heaters. Pay close attention to the
particular model number when referencing
electrical diagnostics, wire diagrams, gas
pressures, replacement instructions, and
for parts. When there is a difference –VA
or –VB will be specified.
Model with
valves in carton
Equivalent Model
RV53e V53e
RV53i V53i
RL75e R75LSe-VB
RL75i R75LSi-VB
RL94e R94LSe-VB
RL94i R94LSi-VB
RC80e RC80HPe
RC80i RC80HPi
RC98e RC98HPe
RC98i RC98HPi
Some of the trade names for models were changed
to indicate that their cartons included isolation valves
and a pressure relief valve. For service and repair
purposes the table below shows the equivalent
models.
R/C42e, R/C53e
10 28 41 49 54 59 69
R70e,
R/C85e(PLUS)
12 29 43 50 56 65 72
R/C53i(PLUS),
R/C85i(PLUS)
12 30 43 51 56 65 76
R/C98e(ASME)
14 31 45 52 56 67 80
R/C98i(ASME)
14 31 45 52 56 67 82
V53e, R63LSe
16 32 41 49 55 60 69
R50LSi,
R75LSi-VA
18 33 43 51 56 63 76
R63LSe2,
R75LSe-VA
18 33 43 50 56 63 72
R94LSe-VA
18 33 43 50 56 63 72
R94LSi-VA
18 33 43 51 56 63 76
R75LSe-VB
20 34 47 50 56 63 72
R75LSi-VB
20 34 47 51 56 63 76
R94LSe-VB
20 34 47 50 56 63 72
R94LSi-VB
20 34 47 51 56 63 76
V53i
20 35 43 51 56 63 76
R98LSe(ASME)
22 36 45 52 58 67 80
R98LSi(ASME)
22 36 45 52 58 67 82
RC80HPe
24 37 47 53 56 68 85
RC80HPi
24 37 47 53 56 68 88
RC98HPe
26 38 48 53 56 68 91
RC98HPi
26 38 48 53 56 68 94
DIAG
NOSTI
C
S
WIRE DI
AG
R
A
M
GA
S CON
T
ROL
FAN
PC BO
AR
D
WATER FLO
W
CO
NTR
O
L
HEAT
EXCHANGER
MODELS
This manual provides service information for the models
below. This table cross references each model to the
applicable page number for internal component
replacement instructions.
100000098 Rev B
