A.O. Smith T-H2-DV User Manual

T-H2-DV/T-H2-OS Service Manual
Ver. 1.01
55
CONFIDENTIAL
12. Controls and settings
12-1.
(A) Diagnosis using the computer board…………………………………………………………………………....
56
12-1.
(B) Diagnosis using the TM-RE30……………………………………………….……………………………..………..
57
12-2.
Verifing functionality of computer board, Displaying error code history, and Clearing error
code history memory…................................................................................................………...
62
12-3.
Clearing the “101” and “991” error code……………………………………………………………………………
64
12-4.
AFR rod function…………………………………………………………………………………………………………………
65
12-5.
Dipswitch settings….…………………………………………………………………………………………………………..
66
12-6.
Assigning unit numbers in the Easy-link system………………………………………………………………….
68
12-7.
12-7.
(A) ON/OFF conditions: Overview………………….………………………………………………………………..
(B) ON/OFF conditions: BTU requirements………………………………………………………………………
69
70
12-8.
(A) Pump control ON/OFF conditions (Only for single and Easy-link system)…………………..… 71
12-8.
(B) Pump control ON/OFF conditions: BTU requirements…………………………………………………..
72
12-9.
Multi-unit system ON/OFF conditions……………….……………………………………………………………….
73
12-10.
Operation time for unit rotation………………………..………….………………….……………………………..…
74
12-11.
12-12.
Individual unit operation in easy-link system while parent unit is under abnormal
conditions (Individual operation mode)………………………………………………………….………………….
High Altitude Region Support Software (FM+, FM++ and FM+++)…....………………….……………
75
76
12-13.
12-14.
How to convert unit of set temperature.…………………………………………………………………………….
Control for exhaust temperature (T-H2-DV only)……..……………………………………………..………….
77
78
12-15.
12-16.
Relay selection for the pump control connection……………………………………………………………….
Alarm port terminal……………………………………………………………………………………………………………
79
80
12-17.
Adjusting manifold gas pressure………………………………………………………………………………………...
81
12-18.
Manually adjusting the fan motor speed………………………………………………………………………….…
83
12-19.
Freeze protection system…………………………………………………………………………………………………...
85
12-20.
Freeze protection for recirculation systems…………………...………………………………………………….
87
12-21.
Draining the unit and cleaning the inlet water filter…….……………………………………………………..
89

A.O. Smith T-H2-DV Specifications

General

Brand	A.O. Smith
Model	T-H2-DV
Category	Water Heater
Language	English