A.O. Smith BTH 120, Service And Parts Manual

A. O. Smith Water Products Company

       Service Handbook

Irving, Texas 2000

©

 Training Department

37

SERVICE CHECKLIST

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: __________________________

INSTALLATION DATE: __________________________

MODEL NUMBER: _________________________

SERVICE DATE: ______________________________

SERIAL NUMBER: _________________________

LOCATION ADDRESS: _________________________

           PHONE (        ) ________ - _____________

GAS TYPE - CHECK ONE

NATURAL   _____
PROPANE  _____
PROPER GAS VALUE VERIFIED

YES ___NO___

I.

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    no

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].