Bradford White TGHE-199I-N User Manual
Page 53
53
INITIAL OPERATION AND TESTING OF CONTROLS (INSTALLER ONLY)
1. Turn on power to the water heater and fully open a hot water tap.
2. Check the operation of the water heater. Check the operation of the remote temperature
control(s). Check the operation of the power failure protection system (drain solenoids).
3. Explain the proper operation of the new Bradford White EverHot
water heater to the end user.
Troubleshooting – Electrical
There are a number of (live) tests that are required when fault finding this product. Extreme care should
be used at all times to avoid contact with energized components inside the water heater. Only trained
and qualified service technicians should attempt to repair this product. Before checking for resistance
readings, disconnect the power source to the unit and isolate the item from the circuit (unplug it).
Table 14.
(SV1, SV2, SV3, SV4, and POV) Gas Valve and Modulating Solenoids (Set Meter Above 2k).
Wire Color
Voltage
Resistance
Connector
No.
Pin
Nos.
(SV0) Pink-Black
11-13 VDC
37-43 ohms
B5
7-8
(SV1) Blue-Black
11-13 VDC
37-43 ohms
B6
6-7
(SV2) Yellow-Black
11-13 VDC
37-43 ohms
B7
5-7
(SV3) Red-Black
11-13 VDC
37-43 ohms
B3
4-7
(SV4) Orange-Black
11-13 VDC
37-43 ohms
B4
3-7
(POV) Orange-Orange
2-15 VDC
67-81 ohms
B2
10-11
Table 15.
(M) Water Flow Control Device Servo.
Wire Color
Voltage
Resistance
Connector
No.
Pin
Nos.
Red or Pink-Orange
5-7 VDC
n/a
G2
3 or 4-
8
Blue or White-
Orange
5-7 VDC
n/a
G2
1 or 2-
8
Red-Pink n/a
30-50
ohms
G2
3-4
Blue-White n/a 30-50
ohms G2
1-2
Gray-Yellow 0-6
VDC
n/a
G2 7-5
Gray-Brown 0-6
VDC
n/a
G2 7-6
Note: The grey wire listed above turns to black at F connector on the PCB.
Table 16.
(QS) Water Flow Sensor.
Wire Color
Voltage
Resistance
Connector
No.
Pin
Nos.
Black-Red 11-13
VDC
n/a
E5 1-3
Yellow-Black
4-7 VDC
1-1.4 Mega ohms
E5
2-3
Table 17.
By-pass Flow Control.
Wire Color
Voltage
Resistance
Connector
No.
Pin
Nos.
Brown-White
2-6 VDC (unit
in operating
mode)
15-35 ohms
G1 1-5
Orange-White G1
2-5
Yellow-White G1
3-5
Red-White -
Ground
G1 4-5