Rheem II Series User Manual

TM090 12-26 Series II CFGWH Service Instructions
REV AB – Issued February 2019
This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed “uncontrolled”
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DIAGNOSTIC TEST POINTS
Refer to wiring diagram, page 8, for connector and wiring positions.
Test
Point
Measuring Point
Normal Condition
Items Under Test
Connector
Wire Nº
& colour
1
A
BL2 – BR1
AC 207V – 264V
Main Power
2
I
W2 – W3
40 kilo-ohms – 500 kilo-ohms
Overheat Limiter
3
F
BL17 – BK16
DC 2V– 5V(Pulse) *1
More than 1310 pulse/min
Water Flow Sensor pulse signal
R18 – BK16
DC 7V – 15V
Water Flow Sensor voltage
4
L
BK3 – R1
DC 5V – 50V
Fan Motor
O4 – BK3
DC 9V – 15V
Y5 – BK3
DC 4V – 10V(Pulse) *1
More than 4800 pulse/min
Fan Motor pulse signal
5
F
W10 – BK9
@ 20ºC – 10.3 kilo-ohms
@ 40ºC – 4.9 kilo-ohms
Water Inlet Thermistor
6
F
G14 – BK9
@ 20ºC – 10.3 kilo-ohms
@ 40ºC – 4.9 kilo-ohms
Heat Exchanger Thermistor
7
F
BL15 – BK9
@ 20ºC – 10.3 kilo-ohms
@ 40ºC – 4.9 kilo-ohms
Hot Water Outlet Thermistor
8
F
BL11 – BK9
@ 5ºC – 12.5 kilo-ohms
@ 20ºC – 6.3 kilo-ohms
Ambient Air Thermistor
9
J
R1 – Earth
AC 1V – 170V *2
Flame Sensor detecting flame
K
GY1 – Earth
AC 1V – 170V *2
10
I
R6 - BK5
DC 1.5V – 14V
40 ohms – 80 ohms
Proportional Gas Flow Regulating
11
I
Y12 – BK11
DC 9V – 15V
17 ohms – 27 ohms
Gas Inlet Solenoid Valve
12
I
O9 – BK11
DC 9V – 15V
Igniter
13
I
R8 – BK11
DC 9V – 15V
14 ohms – 23 ohms
Solenoid Valve 2
14
K
GY1 - Earth
AC 1V – 170V *2
Flame Sensor detecting flame
15
F
W2 – BK1
DC 8V – 16V
Water Volume Control Motor position
switch
R7 – BK1
DC 8V – 16V
G3 – BK1
Less than DC 1V (Limiter ON)
DC 4V – 6V (Limiter OFF)
16
I
Y12 – BK11
DC 9V – 15V
17 ohms – 27 ohms
Gas Inlet Solenoid Valve
BL10 – BK11
DC 9V – 15V
14 ohms – 23 ohms
Solenoid Valve 1
R8 – BK11
DC 9V – 15V
14 ohms – 23 ohms
Solenoid Valve 2
W7 – BK11
DC 9V – 15V
14 ohms – 23 ohms
Solenoid Valve 3
R6 – BK5
DC 1.5V – 14.0V
40 ohms – 80 ohms
Proportional Gas Flow Regulating
J
R1 - Earth
AC1V – 170V *2
Flame Sensor detecting flame
K
GY1 - Earth
AC1V – 170V *2
NOTES:
*1: Approximate reading measured by digital multimeter on DC range.
*2: Approximate reading measured by digital multimeter on AC range.

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