Rc80Hpe, Rc80Hpi - Rinnai REU-KA2530FFUD-US Service Manual

Heat Exchanger and Outgoing Water Temperature
Thermistors:
Check all thermistors by inserting meter leads into
each end of the thermistor plug. Set your meter to the
20 K scale and read resistance. Applying heat to the
thermistor bulb should decrease the resistance.
Applying ice to the thermistor bulb should increase the
resistance.
*Example:
140°F = 2.2 ~ 2.7K
221°F = 0.6 ~ 0.8K
59°F = 11.4 ~ 14K
86°F = 6.4 ~ 7.8K
113°F = 3.6 ~ 4.5K
COMPONENT
TEMP CONTROLLER
THERMAL FUSE
MOD. SOLE. VALVE (POV)
MAIN SOLE. VALVE (SV0)
SOLENOID VALVE 1
SOLENOID VALVE 2
SOLENOID VALVE 3
SOLENOID VALVE 4
SURGE PROTECTOR
SURGE PROTECTOR
ANTI FROST HEATER
IGNITOR
HEAT EXCHANGER TH
OUTGOING WATER TH1
OUTGOING WATER TH2
Condensing Water Heater Service Manual
KA Series Electrical Diagnostic Points
MEASUREMENT POINT
CN PINS
A 1-3
B1 pin1 to E1 pin 1
B2 (1-2), B (10-11)
B5 (1-2), B (7-8)
B6 (1-2), B (6-7)
B7 (1-2), B (5-7)
B3 (1-2), B(4-7)
B4 (1-2), B(3-7)
C1 1-3
C2 1-3
HOT WATER OUTLET LINE
HEAT EXCHANGER PIPING
WATER FLOW SENSOR, HOT WATER OUT-
LET, DRAIN CONNECTION
LATENT HEAT EXCHANGER (INDOOR MOD-
EL ONLY)
D1 1-2
E2 (1, 2), E(5-10)
E3 1-2
E4 3-4
Frost Protection:
This unit has frost protection heaters mounted at
different points to protect the water heater from
freezing.
Amp Fuses:
This unit has one inline (7) amp glass fuse. Remove
the fuse and check continuity through it. If you have
continuity through the fuse then it is good. Otherwise
the fuse is blown and must be replaced.
Flame Rod:
Place one lead of your meter to the flame rod and the
other to ground. With the unit running you should read
between 5-150 VAC. Set your meter to the micro amp
scale. You should read a minimum of 1 micro amp for
proper flame circuit. In the event of low flame circuit
remove the flame rod and check for carbon or damage.
WIRE COLOR
Bk-Bk
R-R
B2: O-O
B5: P-Bk
B6: B-Bk
B7: Y-Bk
B3: R-Bk
B4: O-Bk
Bk-W
W-W
Gy-Gy
W-W
W-W
W-W
10

RC80HPe, RC80HPi

RANGE OF VALUE
DC10-13V
BELOW 1 Ω
DC2-15V / 67-82 Ω
DC11-13V / 37-43 Ω
AC108-132V
10-20 Ω
35-50 Ω
110-150 Ω
90-110 Ω
AC108-132V
(DURING IGNITION)
15ºC/59ºF: 11.4-14.0 kΩ
30ºC/86ºF: 6.4-7.8 kΩ
45ºC/113ºF: 3.6-4.5 kΩ
60ºC/140ºF: 2.2-2.7 kΩ
105ºC/221ºF: 0.6-0.8 kΩ
100000354