A.O. Smith 110 Manual de usuario

110 Indoor / 110 Outdoor Service Manual

Ver. 1.01

CONFIDENTIA

110 Direct Vent Indoor

and Outdoor Models

On-Demand Water Heater

Service Manual

110 Indoor

A.O. Smith Water Products Company

500 Tennessee Waltz Parkway

Ashland City,TN 37015

Toll Free: 1

877

2840

110 Outdoor

110 Indoor / 110 Outdoor Service Manual

Ver. 1.01

CONFIDENTIA

Table of Contents

Specifications………………………………………...…...………….……………………...…………………………

Exterior view……………………...…….……………………………………………………………………………....

Interior view…………………………….………………………………………………………………………………..

Listof main components in the interior view…….……………………………………………………….

Schematic diagram…………………………………………………………………………………………………….

Wiring diagram………………………………………………………………………………………………………….

Wiring diagram checkpoints for diagnosis………………………..………………….….…………………

Resistance values of the temperature thermistors…………..…………………………………………

Operational flow chart……………………………………………………………………………………………….

10.

Component specifications………………...……………………………………………………………………….

11.

FaultAnalysis &Specifications……………………………………………………………........................

12.

Controls and settings………………………………………………………………………………………………….

13.

Components diagrams………………………………………………………………..................................

14.

Parts list……………………………………………………………………………………………………………………..

15.

Revisions……………………………………………………...……………………………………………………………

110 Indoor / 110 Outdoor Service Manual

Ver. 1.01

CONFIDENTIA

1. Specifications of the 110 Direct Vent Indoor* and 110 Outdoor

Model 110 Indoor 110 Outdoor

Dimensions H20.5"×W13.8"×D6.7"

Weight 33 lbs.

Combustion

INPUT

BTU/h Max 140,000

Min 19,500

Combustion System

Power vent

Installation Indoor & Direct-vent Outdoor

Fan motor PWM Multi blade fan

Manifold

Pressure**

Max

LP 2.6” WC

Natural 2.2” WC LP 3.0” WC

Natural 2.7” WC

Min

LP 0.7” WC

Natural 0.6” WC LP 0.8” WC

Natural 0.7” WC

Water control

Flow rate 0.75 to 6.6 GPM

Available set

temperatures 99°F to 167°F

Default:122°F

Temperature

dipswitch settings

113°F, 122°F, 131°F, 140°F

Bypass valve N/A

Thermistors 2 thermistors (In, Out)

Operation

Remote controller

model 9007666005

PCB model 110

Indicators Red LED on PCB during operation

Powersupply

control Surge absorber and Power ON-OFF switch

Features

Freezeprotection

Ceramic heaters

Self-combustion

improvement Air-Fuel Ratio Detection System

Easy-Link system

N/A

Multiple-system

N/A

* The 310 DirectVent Indoor means the 110 Indoor in the text.

**The manifold pressure measurement is base on conditionswithout front cover.

110 Indoor / 110 Outdoor Service Manual

Ver. 1.01

CONFIDENTIA

13-3/4" (350mm)

10" (254mm)

2-1/4" (56mm)

21-3/8" (544mm)

20-1/4" (520mm)

2-1/4" (56 mm) COLD

3-7/8" (98mm) GAS

4-7/8" (124mm) HOT

1" (26mm)

4" (102mm)

4-7/8" (123mm) 120 VAC

7-3/4" (196mm)

1-3/4" (45mm)1-3/4" (45mm)

1-7/8" (47mm)

COLD 3-1/8" (79mm)

HOT 5-1/4" (133mm)

120 VAC 1-3/8" (36mm)

GAS 4-7/8" (124mm)

2-1/4" (57mm)

13-1/8" (334mm)

6-1/4" (160mm)

1" (102mm)

COLD 2-1/4" (56mm)

HOT 4-7/8" (124mm)

HOT 5-1/4" (133mm) GAS 4-7/8" (124mm)

120 VAC 1-3/8" (36mm)

GAS 3-7/8" (98mm)

120VAC 4-7/8" (123mm)

COLD 3-1/8" (79mm)

2. Exterior view

110 Indoor

Side view

Front view

Top view

Bottom view

110 Indoor / 110 Outdoor Service Manual

Ver. 1.01

CONFIDENTIA

13-3/4" (350mm)

10" (254mm)

21-3/8" (544mm)

20-1/4" (520mm)

2-1/4" (56 mm) COLD

3-7/8" (98mm) GAS

4-7/8" (124mm) HOT

1" (26mm)

4-7/8" (123mm) 120 VAC

7-3/4" (196mm)

1-3/4" (45mm)1-3/4" (45mm)

1-7/8" (47mm)

COLD 3-1/8" (79mm)

HOT 5-1/4" (133mm)

120 VAC 1-3/8" (36mm)

GAS 4-7/8" (124mm)

13-1/8" (334mm)

COLD 2-1/4" (56mm)

HOT 4-7/8" (124mm)

HOT 5-1/4" (133mm) GAS 4-7/8" (124mm)

120 VAC 1-3/8" (36mm)

GAS 3-7/8" (98mm)

120V 4-7/8" (123mm)

7-7/8" (203mm)

1-5/8" (43mm)

COLD 3-1/8" (79mm)

110 Outdoor

Side view

Front view

Top view

Bottom view

110 Indoor / 110 Outdoor Service Manual

Ver. 1.01

CONFIDENTIA

3. Interior view

110 Indoor

148256

110 Indoor / 110 Outdoor Service Manual

Ver. 1.01

CONFIDENTIA

110 Outdoor

14825

110 Indoor / 110 Outdoor Service Manual

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4. List of main components in the interior view

No.

Description Item# in

components

diagram

AOS

Part# Common parts

for other models

1 Case assembly 001

319143-159

(110 Indoor)

319143-172

(110 Outdoor)

2Manifold assembly with

gas valve assembly 102 319143-169 (LP model)

319143-165 (NA model)

3 Computerboard 701 319143-164

4 Igniter 711 319143-052 520, 310,510, 910, 710

5 Transformer 702 319143-182 310, 510

6 Water inlet 404 319143-193 310,510

7 Wateroutlet 409 319143-194 310,510

8 Inlet thermistor 407 319143-214 310

9 Outletthermistor 408 319143-218 310

Overheat cut-off fuse 413 319143-149 310,510, 910

Burnerassembly (Burners)

101 319143-161

Hi-limitswitch 412 319143-228 310

Fan motor 103 319143-347

Freeze protection

thermostat

713 319143-185 310,510, 710

710 319143-210 310,510

Flow sensor 402 319143-167 310

Heatexchanger assembly

401

319143-162

(110 Indoor)

319143-166

(110 Outdoor)

Gas inlet 118 319143-050 520, 310, 510

Heater 414 319143-200 310,510

Flow adjustment valve 402 319143-167 310

110 Indoor / 110 Outdoor Service Manual

Ver. 1.01

CONFIDENTIA

No.

Description Item# in

components

diagram

AOS

Part# Common parts

Forother models

Surge box 703 319143-168 310,510

Outletdrain plug 410 319143-199 310,510, 910

Air-fuel ratio rod (AFR rod)

108 319143-339

Flame rod 108 319143-339

Igniter rod 109 319143-373

Inlet drain plug

(water filter) 405 319143-197 310,510

120 VAC

PowerON-OFF switch 706 319143-141 520, 310, 510

Gas valve assembly 102 319143-169 (LP model)

319143-165 (NA model)

Manifold port N/A N/A

Gas inletport N/A N/A

Exhaustchamber Included in

401

319143-162

(110 Indoor)

319143-166

(110 Outdoor)

110 Indoor / 110 Outdoor Service Manual

Ver. 1.01

CONFIDENTIA

5. Schematic diagram

The diagram below refers to both the 110 Indoorand 110 Outdoor.

1. When a hot water tap is opened,cold water enters the 110 Indoor or 110 Outdoor.

2. The water flow sensor detects this water flowand sends this information tocomputer.

3. The computer initiates fan motorand sends signal to igniterto create ignition spark.

4. The main, proportional, and solenoid gas valves open to allow gas input.

5. The gas ignitesand flames appear inside the burner chamber.

6. Water circulates through the heat exchanger and is heated up to the settemperature.

7. Using thermistors to measure temperatures, the computer modulates the gas and water valves to

ensureproperoutputwatertemperatures.

8. When the tap is closed, the 110 Indoor or 110 Outdoor shutsdown.

Hi-limit SW

Inlet drain

plug filter

Outlet

Thermistor

Drain plug

Main gas valve

Gas solenoid valve 2

Fan motor

Flame rod

Igniter rod

Igniter

O.H.C.F

Heater

Flow adjustment valve

with Flow sensor

Gas proportional valve

Gas solenoid valve 1

Air-fuel ratio rod

Gas solenoid valve 3

Inlet

Thermistor Transformer

PCB

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