Service Checklist - A.O. Smith BTH 120 Service And Parts Manual

For series 960 through 967

Service handbook (56 pages)

Table of Contents

This is not intended to be an all-inclusive list of the problems that the Service Agent may encounter. Any item checked "no" on this

list should be thoroughly investigated and corrective action taken, if required.

SERVICE AGENT: __________________________

MODEL NUMBER: _________________________

SERIAL NUMBER: _________________________

GAS TYPE - CHECK ONE

NATURAL _____

PROPANE _____

PROPER GAS VALUE VERIFIED

CHECK CLEARANCE (CIRCLE ANSWER)

A. Are exterior clearances adequate ______________________________________________ yes no

B. Are interior clearances adequate ______________________________________________ yes no

Comments: _______________________________________________________________

_______________________________________________________________

II.

CHECK MAKEUP AIR REQUIREMENTS

A. Is the quality of make-up air adequate? _________________________________________ yes no

Comments: _______________________________________________________________

_______________________________________________________________

B. Is the quantity of make-up air adequate? ________________________________________ yes no

Comments: _______________________________________________________________

_______________________________________________________________

III.

GAS PRESSURE (FILL IN BLANK) - ALL UNITS ON.

A. Supply gas pressure ___ inches of w.c. (flowing)

B. Manifold gas pressure (main burner) ___ inches of w.c. (flowing)

Comments: _______________________________________________________________

_______________________________________________________________

IV.

VENTING (CHECK)

A. Acceptable equivalent footage ________________________________________________ yes no

B. Proper material ____________________________________________________________ yes no

C. Proper exterior installation ___________________________________________________ yes no

D. Condensate will drain _____________________________________________________ yes

Comments: _______________________________________________________________

_______________________________________________________________

V .

WATER PIPING

Is the system properly sized? ____________________________________________________ yes no

Is the system properly installed? _________________________________________________ yes no

Are there any water leaks? ______________________________________________________ yes no

Does the installation have a recirculating system? ___________________________________ yes no

If so, is it operational? __________________________________________________________ yes no

VI.

SAFETY

A. Air

If exhaust is blocked will unit lockout? __________________________________________ yes no

If air intake is blocked will unit lockout? _________________________________________ yes no

B. Water Temperature

- Is the thermostat adjusted to the lowest acceptable temperature? __________________ yes no

- Does the installation have a mixing valve? _____________________________________ yes no

- If so, is it operational? _____________________________________________________ yes no

- What is the outlet temperature of the mixing valve? _______________________________ yes no

NOTE: To minimize the risk of scalding, the manufacturer recommends storing water at 120°F.

Is a properly rated temperature and pressure relief valve installed? _____________________ yes no

Is there a properly installed expansion tank? ________________________________________ yes no

Should there be? ______________________________________________________________ yes no

C. Electrical

Is the 120 VAC electrical powers supply properly wired? (including polarity) ____________ yes no

Are all the BTH control covers in place? _________________________________________ yes no

Is the 120 VAC electrical power supply properly fused? ____________________________ yes no

D. Flammables

Are flammable materials located in the area of the water heater? or air intake? _________ yes no

Are flammable vapors located in the area of the water heater? or air intake? ___________ yes no

E. Gas

If the gas supply is reduced or turned off will the unit turn off? _______________________ yes no

Comments: _______________________________________________________________

_______________________________________________________________

[This service checklist may be photo copied to assist with BTH service calls].

A. O. Smith Water Products Company

Irving, Texas 2000