A.O. Smith fps50, FPS40, FPS 75, FPSE50 User Manual

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Models

FPS 40 and 50

Series 226-227

Prepared by the

Technical

Information Dept.

Irving, Texas

Printed in the U.S.A. 596 4575

~

ruc Wc ~~D~w

WATER PRODUCTS

COMPANY

A DIVISION OF A.O. SMITH CORPORATION

00

FPSE 40 and 50

Series 226E

FPD 40 and 50

Series 226-227

F PS 75

Series 230-233

Part No. TC-O34

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

WORKBOOK INTRODUCTION

@1995
A.D. Smith
Water Products Co.

1

Technical Information

Irvino. Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

TABLE OF CONTENTS

SUBJECT

Choosing the Best Water Heater

Introduction
When to choose the FPS
When to choose the FPSE
When to choose the FPD

Venting Installation

Interior clearances FPS, FPSE, FPD

Exterior clearances FPS, FPSE

Exterior clearances FPD

Condensation

Sealing the vent
Horizontal Length Calc. FPS, FPSE

Vertical Length Calc. FPS, FPSE

Horizontal Length Calc. FPD

PAGE

3

3
4

5

6
7

8
9

10
11
12

13

SUBJECT

Service and Operation
FPS 40 & 50

Sequence of Operation
Wiring Diagram

Troubleshooting Index 23

Parts List 40

FPSE & FPD 40 -50

Sequence of Operation 42
Wiring Diagram

Troubleshooting Index 44

Parts List 66

FPS 75

Sequence of Operation

Wiring Diagram

PAGE

21

22

43

68

69

Vertical Length Calc. FPD

Down Length Calc. FPD

Air for Combustion

Checking the draft

Additional Problems

Negative Pressure
Make-up Air

14

15

16

17

19

20

Troubleshooting

70

Parts List 94

Part Infom1ation 96

Service Checklist 97
General Q & A

99

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

CHOOSING THE BEST WATER HEATER

@1995

A.D. Smith

Water Products Co.

3

Technical Information

Irving, Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

CHOOSING THE BEST WATER HEATER cant.

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

CHOOSING THE BEST WATER HEATER cant.

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

VENTING INSTALLATION

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

VENTING INSTALLATION cant.

Exterior
Clearances:

FPS
FPSE

Exterior installation clearance requirements are crucial and must be met to ensure
compliance with all safety and code requirements. If all clearances cannot be
met, do not unpack the heater.

All exterior clearance requirements for the FPS and FPSE are measured from the
vent termination.

Min. clearances for side wall venting: Min. clearances for vertical:

Inside corner - 3' l' above or 4' to the side of any
Side of door or window - 4' gable, dormer, or roof structure
Above door or window - l' with building interior access.
Below a window - 4' l' above snow level.
Above public walkway - 7'

Above ground or snow level -1'
Air intake to a living space - 3' above if air intake is within 10'

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

VENTING INSTALLATION cant.

Exterior
Clearances:
FPD

@1995
A.D. Smith

Water Products Co.

Exterior installation clearance requirements are crucial and must be met to ensure
compliance with all safety and code requirements. If all clearances cannot be
met, do not unpack the heater.

All exterior clearance requirements for the FPO are measured from the vent
termination.

Min. clearances for side wall venting: Min. clearances for vertical:

Inside corner - 3' l' above or 4' to the side of any

Side of door or window - 9" gable, dormer, roof structure
Above door of window - 9" with building interior access.
Above public walkway - 7' l' above snow level.

Above ground or snow level -1'
Air intake to a living space - 3' above if air intake is within 10'

8

Technical Information

IrvinQ. Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

VENTING INSTAllATION cant.

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

VENTING INSTAllATION cant.

VENTING INSTAllATION cant.

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

VENTING INSTAllATION cant.

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

VENTING INSTAllATION cant.

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

VENTING INSTALLATION cant.

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

VENTING INSTAllATION cant

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

AIR FOR COMBUSTION

Checking for
Draft

On initial start up, check for the correct draft on the Power Shot. To check the
draft, place a smoke stick directly in front of the inlet air damper while the heater
is firing. A properly operating system will draw the smoke into the inlet air damper
as shown in the right illustration. The illustration on the left shows a negative

To check for a negative condition close all windows, outside doors, and fireplace
dampers. Turn on all exhausting appliances, including kitchen draft hoods,
clothes dryers, furnaces, bathroom vents, etc. Open all inner doors between
these appliances and the Power Shot.

Once all appliances are on and inner doors open, open the inlet air damper on
the Power Shot when the heater is not firing. Using your hand, check for air
movement. If air is being blown back into the room, a negative pressure condition
exists.

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

AIR FOR COMBUSTION cant.

CONDITION

Burnt gas odor when
heater is operatinq

CAUSE

Leaking vent
joints

Blocked vent

SOLUTION

Seal vent joints

Clear vent blockaQe

The majority of the complaints associated with the operation of the will likely be a direct result of
improper venting. If the customer complains of smelling burnt gas around the water heater, first
check for vent gases that may be leaking from the PVC joints or around the area between the blower
assembly and water heater. Seal all leaks with the high temperature silicone sealant provided.

Check for restrictions in the venting that may cause some spillage of burnt gas into the room and
check your draft, visually inspecting the vent termination for blockage, clearing blockage as

necessary.

Improper venting is also a major cause of sooting in water heaters. If you experience sooting with
the POWER SHO~, check that the inlet air damper swings freely and opens 1 1/4" when the blower
is running.

If water is dripping from the blower, condensate is the culprit

To correct the problem, install a

condensate tee, and pipe to drain.

If the customer complains of nuisance pilot outage or pilot gas odor on standby, this may be due to a
lack of combustion air, or other appliance (exhaust fans, clothes dryers, etc.) creating a backdratt in
the FPS venting. In either case, install additional make-up air ducts.

@1995
A.D. Smith

Water Products Co.

17

Technical Information

Irving, Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

AIR FOR COMBUSTION cont.

CONDITION CAUSE SOLUTION

Inlet air damper not

build-up in PVC
venting

Intermittent
fan cycling
without burner

operation
(Propane Only)

A malfunctioning vent damper may also cause excessive heat buildup in the PVC vent piping

unable to free the damper, replace the entire combustion control tee.

If blower does not run when the main burner fires, replace the control box. Also check burner orifice
for correct size.

opening completely
Blower does not run when

main burner fires

Wrong main burner

orifice size

Build up of
pressure in the

main burner tube
between thermostat
gas valve and
solenoid qas valve

Free air damperExcessive heat

Replace entire
blower assembly

Install correct
orifice

If cycling occurs
more than twice per hour,
see troubleshooting

procedures.

If

Intermittent cycling of the fan, without main burner operation, indicates a build-up of pressure in the

main burner tube between the thermostatic gas valve and solenoid gas valve.

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

AIR FOR COMBUSTION cont.

Negative
Pressure

Diagnosing pilot outage complaints requires an examination of the environment in
which the heater is installed. Mechanical vent fans are the chief cause of
negative pressure. If the house is too tight, more air will be exhausted from the
structure than is being brought in from the outside, resulting in a negative
pressure condition. Fireplaces, furnaces, wind, and thermal stacking within the
house can also playa role in creating negative pressure conditions.

Negative pressure can result from air being backdrafted through the water heater
vent down into the combustion chamber, blowing out the pilot. This may happen
randomly because it may be a particular combination of appliances which cause

the condition.

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

AIR FOR COMBUSTION cont.

A.D. Smith

Water Products Co

20

Technical Information

Irving, Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 40 and 50 SERVICE AND OPERATION

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 40 and 50 SERVICE AND OPERATION cant.

-A~I

DISCONNECT FROM ELECTHICAL
SUPPLY BEFORE SERVICING UNIT.
REPLACE ALL DOORS AND PANELS
BEFORE OPERATING HEATER.

115~LT

POWER SOURCE

""

w

ON

SWITCH

OFF

; rc

CONNECTOR,

I O/Y.. G/Y I

w ,

r<

c

R

r---rr

~~~

PRESSUREI COIL

SWITCH I ~~

I
I HEATER (A~ QAS MANIFOLD) - J

""

Gim

W

~~:=: ~~~-~

~.WlAECABLE

SUPPUED WIn! UNIT

'\ I . ===- CONNECroR

,J~"-- I I LEGEND

~

AIR

PRESSURE

~,

B=BLACK
W=WHITE
R=RED
G=GREEN
G/Y=GREEN/

YELLOW

U=BLUE

@1995
A.D. Smith

Water Products Co

~

~

22

Technical Information

IrvinQ. Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 40 and 50 SERVICE AND OPERATION cant.

@1995
A.D. Smith
Water Products Co.

23

Technical Information

Irving, Texas

Trouble­shooting cont

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 40 and 50 SERVICE AND OPERATION cant

PRELIMINARY CHECKS

1. Gas valve knob is in ON position

2. Pilot is burning

3. 120 VAG is supplied to heater.

4. Thermostat is calling for heat

(See page 25)

5. Blower ON/OFF switch is in the ON position

6. Connection between blower motor and blower control box is secure

7. Heater is installed per manual

@1995

A.D. Smith

Water Products Co.

24

Technical Information

Irving, Texas

Trouble-

shooting cont.

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 40 and 50 SERVICE AND OPERATION cant.

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 40 and 50 SERVICE AND OPERATION cant.

@1995
A.D. Smith

Water Products Co.

26

Technical Information

Irving, Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 40 and 50 SERVICE AND OPERATION cont.

Trouble-

shooting cont.

BLOWER DOES NOT RUN cant.

RESULTS

If: then:
the fan does not run,
the fan does run,

@1995
A.D. Smith
Water Products Co.

27

replace the fan assembly.

go to Step 2.

Technical Information

Irving, Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 40 and 50 SERVICE AND OPERATION cant.

Trouble­shooting cont.

BLOWER DOES NOT RUN cont.

RESULTS

If:
the fan does not run,
the fan does run

then'
replace the cable
go to Step 3.

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 40 and 50 SERVICE AND OPERATION cant.

Trouble-

shooting cont

BLOWER DOES NOT RUN cant.

RESULTS
If:

the fan does not run,
the fan does run,

then
replace the harness
replace the gas pressure switch

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 40 and 50 SERVICE AND OPERATION cont.

@1995
A.D. Smith

Water Products Co

30

Technical Information

IrvinQ, Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 40 and 50 SERVICE AND OPERATION cant

Trouble­shooting cont

BLOWER RUNS CONSTANTLY (No call for heat) cont

RESULTS
If:

the fan stops,

@1995
A.D. Smith
Water Products Co.

31

then
replace the fan assemblythe fan continues to run,
go to Step 2

Technical Information

Irving, Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 40 and 50 SERVICE AND OPERATION cant.

Trouble­shooting cont.

BLOWER RUNS CaNST ANTL Y (No call for heat) cant.

RESULTS
If:

the fan continues to run,
the fan stops,

then:

replace the cable.

go to Step 3.

shooting cont.

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 40 and 50 SERVICE AND OPERATION cant.

BLOWER RUNS CONSTANTLY (No call for heat) cant.Trouble-

RESULTS

If: then:
the fan continues to run,
the fan stops,

replace the harness
replace the gas pressure switch.

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 40 and 50 SERVICE AND OPERATION cant

@1995
A.D. Smith
Water Products Co.

Technical Information

Irving, Texas34

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 40 and 50 SERVICE AND OPERATION cant

Trouble-

shooting cont.

BLOWER RUNS CONSTANTLY (No main burner) cont.

RESULTS

If:
the meter does not read 120 VAG,
the meter does read 120 VAG, go to Step 2

@1995
A.D. Smith
Water Products Co

35

then
replace the air switch

Technical Information

Irving, Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 40 and 50 SERVICE AND OPERATION cant

Trouble­shooting cont.

BLOWER RUNS CONSTANTLY (No main burner) cant.

RESULTS

If:
the meter does not read 120 VAG,
the meter does read 120 VAG,

@1995

A.D. Smith

Water Products Co.

36

then
replace the cable
go to Step 3

Technical Information

Irving, Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 40 and 50 SERVICE AND OPERATION cant.

Trouble­shooting cont.

BLOWER RUNS CONSTANTLY (No main burner) cont.

RESULTS

If: then:
the meter does not read 120 V AC
the meter does read 120 V AC,

replace the harness
replace the solenoid.

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 40 and 50 SERVICE AND OPERATION cont

Trouble-
shooting cont.

PILOT PROBLEMS

The following are possible causes of pilot problems:

1. Incorrect pilot position; the pilot should engulf the tip of the
thermocouple 3\8" to 1\2",

2. Incorrect thermocouple output; it should generate 7 or more millivolts
when pilot is burning.

3. Incorrect pilot gas pressure; it should be 3.5" for natural gas and 10"

for propane.

4. Excessive equivalent foot length on vents can cause pilot outages

5. Backdraft can cause pilot outages. (See page 16)

6. An open E.C.O. will not allow the heater to be relit.

7. A leak in the pilot tube will cause candling.

@1995
A.D. Smith

Water Products Co.

38

Technical Information

Irvin.CI. Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 40 and 50 SERVICE AND OPERATION cant.

Trouble-

shooting cont.

MAIN BURNER PROBLEMS

The following are possible causes of main burner problems:

1. Unlevel burner will cause yellow flames

2. Burning and the orifice indicates main gas valve may not be fully
closing.

3. Incorrect manifold gas pressure; it should be 3.5" for natural gas and 10"
for propane.

4. Soot build-up. Check gas pressure and air flow through heater and
venting.

@1995

A.D. Smith
Water Products Co.

39

Technical Information

IrvinQ, Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 40 and 50 PARTS LIST

RESIDENTIAL WATER HEATER PARTS LIST

MODELS FPS-40 AND 50

SERIES 226/227

PSD-1-263/b

@1995
A.D. Smith
Water Products Co

L;'~ @).,~ ffi]'G;J

WATER PRODUCTS

5621 W. 115TH STR~~T, ALSIP, ILLINOl5 60462/1-600-433-2545

COMPANY

40

April 1994

Technical Information

Irving, Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

!!!!!!

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37
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Blower. Assembly

eur~~r Assftmbly Nalu!'31 .. . BurnElr Assembly Prooal'&

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Valle Solenoid PropanfJ . .

Cab'Oi, ~rlrol W'C!lp~ . .

C-'!p "'owe' Ven1 Door .. . . .

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leg, Dr! Asse'T1b;~ rP"'"Jp3'1e Orlyi ... 18121>6
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');glj l~n1pe'~!t.re of 450"r ana a iow 01 -IS:F Equalla NatIOnal Polymer Pr:)(ll-<;t$, Se.~lcon II
Pa" ,\;J"'ber~ !,!'12~"'~~ are 'fJCOl1'fT'&f\o9d stock it&ms lor eme'~ncy r~plaCel11ef1l. I:Con~iaQr gas used 1'1 yol;r area only)

@1995
A.D. Smith
Water Products Co

41

Technical Information

Irving, Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPSE 40 and 50 SERVICE AND OPERATION

FPD 40 and 50 SERVICE AND OPERATION

@1995
A.D. Smith

W~t~r Products Co

Technical Information

Irving, Texas42

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

@1995
A.D. Smith
Water Products Co.

43

Technical Information

Irving, Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPSE 40 and 50 SERVICE AND OPERATION cont

FPD 40 and 50 SERVICE AND OPERATION cont.

PageI Subject

I Preliminary Checks

I Blower does not run

I

Blower runs constantly
(No call for heat)

Blower runs constantly
(Calling for heat, no pilot)

Blower runs constantly
(Calling for heat, pilot is lit, no
main burner)

Pilot Problems
Main Burner Problems

Page 45
Page 46

iPage51

I Page 54

I Page 61

Page 64
Page 65

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPSE 40 and 50 SERVICE AND OPERATION cont.

FPD 40 and 50 SERVICE AND OPERATION cont.

@1995
A.D. Smith
Water Products Co.

45

Technical Information

Irving, Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPSE 40 and 50 SERVICE AND OPERATION cont.

FPD 40 and 50 SERVICE AND OPERATION cont.

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPSE 40 and 50 SERVICE AND OPERATION cant.

FPD 40 and 50 SERVICE AND OPERATION cant.

Trouble­shooting cont.

BLOWER DOES NOT RUN cont.

RESULTS

If:
the meter does not read 120 VAG,
the meter does read 120 V AC,

@1995
A.D. Smith

Water Products Co.

47

then
replace the blower assembly.

go to Step 2.

Technical Information

Irving, Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPSE 40 and 50 SERVICE AND OPERATION cant.

FPD 40 and 50 SERVICE AND OPERATION cant.

Trouble­shooting cont

BLOWER DOES NOT RUN cant.

RESULTS

If:
the meter does not read 120 VAG, replace the cable.
the meter does read 120 VAG,

@1995
A.D. Smith

Water Products Co.

48

then:

go to step 3.

Technical Information

Irvina. Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPSE 40 and 50 SERVICE AND OPERATION cont.

FPD 40 and 50 SERVICE AND OPERATION cont.

Trouble-

shooting cont.

BLOWER DOES NOT RUN cont.

RESULTS

If:
the meter does not read 120 V AC
the meter does read 120 VAG, go to Step 4.

then
replace high limit.

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPSE 40 and 50 SERVICE AND OPERATION cant.

FPD 40 and 50 SERVICE AND OPERATION cant.

Trouble-

shooting cont.

BLOWER DOES NOT RUN cant.

@1995
A.D. Smith
Water Products Co.

50

Technical Information

Irving, Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPSE 40 and 50 SERVICE AND OPERATION

FPD 40 and 50 SERVICE AND OPERATION cont.

@1995
A.D. Smith

Water Products Co.

51

Technical Information

Irving, Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPSE 40 and 50 SERVICE AND OPERATION cant.

FPD 40 and 50 SERVICE AND OPERATION cant.

Trouble­shooting cont.

BLOWER RUNS CONSTANTLY (No call for heat) cont.

RESULTS

If:
the blower continues to run,
the blower stops,

then

replace the blower.

go to Step 2

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPSE 40 and 50 SERVICE AND OPERATION cant.

FPD 40 and 50 SERVICE AND OPERATION cant.

Trouble­shooting cont

BLOWER RUNS CONSTANTLY (No call for heat) cant.

Rt.~\}'-\~

If:

, the blower continues to run

I the blower stops

then

\ replace the cable

I see preliminary checks

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPSE 40 and 50 SERVICE AND OPERATION cont.

FPD 40 and 50 SERVICE AND OPERATION cont.

Trouble-
shooting

cont.

BLOWER RUNS CONSTANTLY

(CAlliNG FOR HEAT, NO PilOT)

First make the Preliminary Checks (see page 45), then perform each of the
following tests until cause of the failure is determined:

1. Air Pressure Switch

2. Cable Test

3. TH Wire Test

4. PV -PV IMV Test

5. Spark Test

6. Pilot Valve

@1995

A.D. Smith
Water Products Co.

54

Technical Information

IrvinQ, Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPSE 40 and 50 SERVICE AND OPERATION cant.

FPD 40 and 50 SERVICE AND OPERATION cant.

Trouble­shooting cont.

BLOWER RUNS CONSTANTLY (Calling for heat, no pilot) cant.

RESULTS
If:

the meter does not read 24 V AC

then:
replace the pressure switch.

the meter does read 24 V AC, go to Step 2

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPSE 40 and 50 SERVICE AND OPERATION cant.

FPD 40 and 50 SERVICE AND OPERATION cant.

Trouble-

shooting cont.

BLOWER RUNS CONSTANTLY (Calling for heat, no pilot) cant.

RESULTS

If:
the meter does not read 24 VAG,
the meter does read 24 VAG,

then

replace the cable.

go to Step 3

Trouble­shooting cont

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPSE 40 and 50 SERVICE AND OPERATION cant.

FPD 40 and 50 SERVICE AND OPERATION cant.

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPSE 40 and 50 SERVICE AND OPERATION cont.

FPD 40 and 50 SERVICE AND OPERATION cont.

Trouble-

shooting cont

BLOWER RUNS CONSTANTLY (Calling for heat, no pilot) cant

RESULTS

If:

the meter does not read 24 V AC,
the meter does read 24 VAG,

@1995
A.D. Smith

Water Products Co

58

then"
replace the
go to Step 5

D

Technical Information

Irving, Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPSE 40 and 50 SERVICE AND OPERATION cant.

FPD 40 and 50 SERVICE AND OPERATION cant.

Trouble­shooting cont.

BLOWER RUNS CONSTANTLY (Calling for heat, no pilot) cant

@1995
A.D. Smith

Water Products Co

Technical Information

Irving, Texas59

shooting cont.

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPSE 40 and 50 SERVICE AND OPERATION cont.

FPD 40 and 50 SERVICE AND OPERATION cont.

BLOWER RUNS CONSTANTLY (Calling for heat, no pilot) cant.Trouble-

RESULTS

If: then:
the meter does not read continuity,
the meter does read continuity,

replace pilot valve.

check gas supply.

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPSE 40 and 50 SERVICE AND OPERATION cont.

FPD 40 and 50 SERVICE AND OPERATION cont.

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPSE 40 and 50 SERVICE AND OPERATION cant.

FPD 40 and 50 SERVICE AND OPERATION cant.

Trouble-

shooting cont.

BLOWER RUNS CONSTANTLY (Calling for heat, pilot is lit, no main burner)

cant.

RESULTS
If:

the meter does not read 24 VAG,

the meter does read 24 VAG,

A.D. Smith
Water Products Co.

62

then:
replace the 1.1.0
go to Step 2.

Technical Information

Irving, Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPSE 40 and 50 SERVICE AND OPERATION cant.

FPD 40 and 50 SERVICE AND OPERATION cant.

Trouble-

shooting cont.

BLOWER RUNS CONSTANTLY (Calling for heat, pilot is lit, no main burner)

cont.

RESULTS

If: then
the meter does not read continuity,
the meter does read continuity,

replace main valve.
check gas supply.

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPSE 40 and 50 SERVICE AND OPERATION cant.

FPD 40 and 50 SERVICE AND OPERATION cant.

Trouble-

shooting cont.

PILOT PROBLEMS

The following are possible causes of pilot problems:

1. An open E.C.O. (high limit) will not allow the heater to relight. (See
page 49)

2. Incorrect pilot gas pressure: it should be 3.5" w.c. for natural gas. It
should be 10" w.c. for propane gas.

3. Incorrect excessive equivalent foot length on vents can cause pilot
outages.

4. Incorrect pilot position: The pilot should engulf the tip of the flame
sensor 3/8'1 to 1/2".

5. A leak in pilot tube will cause candling

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPSE 40 and 50 SERVICE AND OPERATION cont.

FPD 40 and 50 SERVICE AND OPERATION cont.

Trouble-
shooting cont.

MAIN BURNER PROBLEMS

The following are possible causes of main burner problems:

1. Unlevel burner will cause yellow flames.

2. Burning and the orifice indicates main gas valve may not be fully
closing.

3. Incorrect gas pressure; it should be 3.5" for natural gas and 10"
for propane.

4. Soot build-up. Check gas pressure and air flow through heater and
venting.

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPSE 40 and 50 PARTS LIST

FPD 40 and 50 PARTS LIST

P,,'NTED'" V.5.".

@1995

A.D. Smith

Water Products Co.

ill.. @J.. ~~

WATER PROOUCTS

582' w. , '5TH 8TR~~T. ~l81". IllINOIS 8O.'2rl-800-433-25.5 JUly 1995

COMPANY

66

Technical Information

Irving, Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

~n" 222,'223 ~~~~ ~~~?

,~ De~t,pll()tI ~ ~ ~~.Q ~~

A"!J'B Doot L&" . . . . . . 181450 181450

J A.-ode ,.. 43816.38 4J8'6.3a 43817.29 43817.35
.J BaH'e ..al'g.f . . '81300 181.160 181:)60 181360
4 ~IO_f Assembly '81616 1816'6 181643 181843

5 aO) Top. LOW@f A" Su~1y . . . . . . 1111469 '81469

6 aO) Boll""'. Lower Aof ~y . . . . . . 'SI490 'S14QQ

1 tlracket, Ga. Valve . . . '81709 181709 '81898 181-

-; Bracket Gas Valve. Series 227 Only. . . . . . . . . . , 16~194 182194

e 6um..r. AS$emblV

Nalvr~ 04$ . . '81732 181732.2 '81732.12 161732.1~

P'OPan& a65 . .. . , . 181732.1 181732.3 181732.12 18'732.;4

9 Burtler WI'" P~ot

NalurelGas 181726 181126 16172e '61725

P.opa'le Gas . .. .. 181726.1 181726-1 161726-1 161726.1

10 Cable. COtIlroI w/C1~ . . . . . .. . . .. . . ., 181728 181728 181728 181728

11 Collar, p~ . . . . .. . . . .. 20112.1~ 20112-14 20172.14 20172.14

1"1 Coupl"'9 181M3181543 ...

13 Doat,IMe!. ., 1S1596 1&0S96 161449 18'~9

14 000' Panej. ao- . ..., . , ... ,.. 181~ 181708 181943 181943

15 DoooPana;. Tpp ,. 181857 181857 181942 18'942
16 DODfPanel. ~ , 181858 181856 181~' 18'941

11 DoooPafi-'. A~~..., 181859 18'859 181940 181940

19 Doaf Panei. Lell 1818&} 18'860 161D3D 181i39

19 Door.Plug. O\II8r ... .. .. . .. . 181733 181733 - . -. . ..

;10 Erbow~Ex/I8utt.FPOOnIv 181528 181528
~, EIbowA.-y_lnlaU.FPOOnty 18'l161 182161

22 Flue Baffle . . . . . . . 181382 181382 181382 181382

23 Flue ReslrK:ror . . " . .. . .. . . . , 34894 34894 ~ 34894

23A G~kel.FiberglaS& ..,,' ... '.," 182130 182130

24 GaskellnlelTM.FPOOIIIy ." 161165 181155

Z$ GrQrnmet. Out.. CoOt ".. .. . , " . . .. 1817M 181784 1617$4-1 181784.1

21; ~"er " ..,.,... 181134 181734 181903 181903

27 InSUlsliotl,AngI&. ., 182132 182132

28 ir'$U~'Jon, Doqo , ., ., " . . . . . . . 182131 '82131

29 ..ilo.I.l.lghlln~ & ~aling ,.. 18'719 '81119 182Q65 '82065

29A legJROQuv.d '.'.'.'" 38046 38046

30 Leg. !)or! A.~ ~ Gas.. " .' , , .. 4)781 43781 ~7til 43761
31 MOOUIe. IgrwIIon "..,. ..,.. '61723 18172J 181723 181723

32 Ortf'C~, A.. f1ow, FPO 0nIv .. - - - - . . . - 181773 181173

33 On/a Mam 9\1 NolvralGa. ,.,. ..."" 161S08.1~3 161~123 181~31 181508'()31

34 OrtllCe. ~ICI

35 Pipe. P VC go' E~ , . . . 181530 181530 . - - . . . -.

36 Pil'8.PVC3'X48'L~... 181531.1 181531-1 "".-
37 Pjl'8.PVC.3"xrl~ 181837 181837

38 ~.PV,C.3"K1T~ ,... 181531 181531

38A P18t&.Cowr... , 181838 '61938

39 Plal8,1.b.w!bng., ,. ..,.. 181815 '61015 181944 181944

40 Plale, Wall .. 181557 181557 181551 161S51

41 PmI«1or, P81son1'&i .. '8'758 '81758 181756 '81758
42 R.,M ".. 181825 18162~

,13 . ~ale'. T~ HiO" T""P SIICone s-IanI 181564 181564 181564 181564

4JA TH.F'VC.3" 181762 181762

44 Te. Assembly, E-"8usl ~"SE. PGSE Only 181811 181611 . . . . . . . -

J\S Tee AsA'11biy, COI1densa'. . . . '81861 181881 181861 181861

46 E CO.. . '8171J6 '8171J6 181~ 1817011

41 T~!al.,... ,... ..., 18170! 181705 18'705 18170S

48 T.Jbe.BumBr

49 T\be, Inlet . ... 21(Je1-J,'J 21(Je7-33 161)374.28 160374.28

50 T.Jbe. Pilac . . . .. ,.. 23m 23330 23330 23330

51 T\Jb8,Re8rAtfSuppiy., .., 1e17n 181772.'

52 Valv., Drain. . .. . . . . ., ,... 2627~ 2Q7U C2037 42037.1

53 V"Iv~ Gas:

54 V- Main aa.5Mo« .,.. , 181737 181131 181737 161737

55 'N"e ~ . .. . . 16'736 1811~ 1811~.2 161~2

56 W,... Harne.. . . . . . . '6'609 181609 181~ 161952

PIOP- Oas . . . . ... . , . . ... . . .. 181628.50 181628-50 181791-50 181791.50

Natural 0.. .. . . .. ...,... '808'4 '00814 1~14 '008'4

P'op",~ 0&5 " . . . . , , . . 180824 100824 1824 180824

Na"'alGas , '814t2.e 181~.1 181482-11 18148212
F'~GAS .,. 181482~ 181482-1 181792-11 181792"2

N;JIUt.J Ga, . .. ... . ... 181721' 1817'l1 18'950 '81950

Propane Gas .. .. ... . . '8'722 18172? 182'92 162102

. :,fIaI~nl musl cOr1lo.m 10 MIL.A-46106A. \'yV~ 1.IfDAZ1 CFR 175300 MoItl De ebJe to wiChs18nd ~5t~nl

""9" lem~'.1U" 01 'SO'F and a low 01 .. ?5"~ EQual 10 Na1~j Polymer p~. s.8~ II

FPSE.40 ~PSE.50

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 75 SERVICE AND OPERATION

@1995

A.D. Smith

Water Products Co.

68

Technical Information

Irving, Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 75 SERVICE AND OPERATION cant.

@1995
A.D. Smith
Water Products Co

69

Technical Information

Irving, Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 75 SERVICE AND OPERATION cont.

Subject

Preliminary Checks

Page

Page 71
Page 72Blower does not run

Blower runs constantly

Page 76

(No call for heat)
Blower runs constantly

.:>age 79

(Calling for heat, no pilot)
Blower runs constantly

Page 89
(Calling for heat, pilot is lit,
main burner)

Pilot Problems Page 92
Main Burner Problems Page 93

@1995
A.D. Smith

Water Products Co.

70

Technical Information

Irving, Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 75 SERVICE AND OPERATION cant.

Trouble- PRELIMINARY CHECKS

shooting cont.

A.D. Smith
Water Products Co.

71

Technical Information

Irving, Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 75 SERVICE AND OPERATION cant,

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 75 SERVICE AND OPERATION cant.

Trouble-

shooting cont

BLOWER DOES NOT RUN cont.

RESULTS
If:

the meter does not read 120 VAG,

the meter does read 120 VAG,

then:
replace the blower assembly.
go to Step 2

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 75 SERVICE AND OPERATION cant.

Trouble-

shooting cont.

BLOWER DOES NOT RUN cant.

@1995
A.D. Smith

Water Products Co.

j

74

Technical Information

Irvina. Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 75 SERVICE AND OPERATION cant.

Trouble-

shooting cont.

BLOWER DOES NOT RUN cant.

RESULTS
If:

the meter does not read 120 VAG,
the meter does read 120 VAG,

@1995

A.D. Smith

Water Products Co.

75

then:

replace the thermostat.
go to preliminary checks.

Technical Information

Irving, Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 75 SERVICE AND OPERATION cont.

PRELIMINARY CHECKS EXCEPTIONS

4. Heater should be calling for heat.

@1995
A.D. Smith
Water Products Co.

76

Technical Information

Irving, Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 75 SERVICE AND OPERATION cant.

Trouble­shooting cont.

BLOWER RUNS CONSTANTLY (No call for heat) cont

RESULTS

If:

the blower continues to run
the blower stops,

then

replace the blower

go to Step 2.

shooting cont.

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 75 SERVICE AND OPERATION cant.

BLOWER RUNS CONSTANTLY (No call for heat) cant.Trouble-

RESULTS
If: then"

the blower continues to run,
the blower stops,

replace the cable
see preliminary checks.

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 75 SERVICE AND OPERATION cant.

Trouble-
shooting

cont.

BLOWER RUNS CONSTANTLY

(CAlliNG FOR HEAT, NO PilOT)

First make the Preliminary Checks (see page 71) then perform each of the
following tests until cause of the failure is determined:

1. Air Pressure Switch Test

2. Vent High Limit Test

3. Blower Test -

4. Cable Test

5. High Limit Test

6. TH Wire Test

7. PV - MV/PV Test

8. Spark Test

9. Pilot Solenoid Test

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 75 SERVICE AND OPERATION cont.

Trouble-

shooting cont.

BLOWER RUNS CONSTANTLY (Calling for heat, no pilot) cant.

RESULTS
If:

the meter does not read 24 VAG
the meter does read 24 VAG,

Line=24 V AC supply

Load=Wire carrying current onto high limit

then:

replace the air pressure switch

go to Step 2.

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 75 SERVICE AND OPERATION cant.

Trouble­shooting cont.

BLOWER RUNS CONSTANTLY (Calling for heat, no pilot) cont

RESULTS

If:
the meter does not read 24 VAG, replace the vent high limit.
the meter does read 24 VAG,

then:

go to Step 3.

Line=24 VAG supply

Load=Wire carrying current onto connector

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 75 SERVICE AND OPERATION cont.

Trouble­shooting cont.

BLOWER RUNS CONSTANTLY (Calling for heat, no pilot) cont.

RESULTS

If: then:
the meter does not read 24 V AC,
the meter does read 24 VAG,

@1995
A.D. Smith

Water Products Co.

82

replace the blower.

go to Step 4.

\

Technical Information

Irving, Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 75 SERVICE AND OPERATION cant.

Trouble-

shooting cont.

BLOWER RUNS CONSTANTLY (Calling for heat, no pilot) cant.

RESULTS
If: then:

the meter does not read 24 VAG
the meter does read 24 VAG,

@1995
A.D. Smith
Water Products Co

~

83

replace the cable.
go to Step 5.

Technical Information

Irving, Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 75 SERVICE AND OPERATION cont.

Trouble-

shooting cont.

BLOWER RUNS CONSTANTLY (Calling for heat, no pilot) cont.

RESULTS
If:

the meter does not read 24 VAG, replace high limit
the meter does read 24 VAG,

A.D. Smith
Water Products Co.

84

then:

go to Step 6.

Technical Information

Irving, Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 75 SERVICE AND OPERATION cant.

Trouble­shooting cont.

BLOWER RUNS CONSTANTL Y'(Calling for heat, no pilot) cant.

RESULTS
If:

the meter does not read 120 VAG,
the meter does read 120 VAG,

then:
replace wire.
go to Step 7

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 75 SERVICE AND OPERATION cant

Trouble­shooting cont.

BLOWER RUNS CONSTANTLY (Calling for heat, no pilot) cant.

RESULTS
If:

the meter does not read 24 V AC, replace the 1.1.0.
the meter does read 24 VAG, go to Step 8.

@1995
A.D. Smith

Water Products Co.

86

then:

Technical Information

Irving, Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 75 SERVICE AND OPERATION cont.

T rouble-

shooting cont.

BLOWER RUNS CONSTANTLY (Calling for heat, no pilot) cant.

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 75 SERVICE AND OPERATION cant.

Trouble­shooting cont.

BLOWER RUNS CONSTANTLY (Calling for heat, no pilot) cant.

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 75 SERVICE AND OPERATION cant.

@1995
A.D. Smith

Water Products Co.

89

Technical Information

Irving, Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 75 SERVICE AND OPERATION cant.

Trouble-

shooting cont.

BLOWER RUNS CONSTANTLY (Calling for heat, pilot is lit, no main burner)

cant.

RESULTS
If:

then:
the meter does not read 24 VAG, replace the I.I.D.
the meter does read 24 VAG,

go to Step 2.

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 75 SERVICE AND OPERATION cant.

Trouble-

shooting cont

BLOWER RUNS CONSTANTLY (Calling for heat, pilot is lit, no main burner)

cont.

RESULTS

If:
the meter does not read continuity,
the meter does read continuity,

then:

replace the main valve.
check gas supply.

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 75 SERVICE AND OPERATION cant.

Trouble-

shooting cont.

PilOT PROBLEMS

The following are possible causes of pilot problems:

1. An open E.C.O. (high limit) will not allow the heater to relight. (See page 84).

2. Incorrect pilot gas pressure: it should be 3.5" for natural gas and 10" for
propane.

3. Excessive equivelant foot length on vents can cause pilot outages.

4. Incorrect pilot position; the pilot should engulf the tip of the flame sensor 3\8" to
1\2".

5. A leak in pilot tube will cause candling.

@1995

A.D. Smith

Water Products Co.

92

Technical Information

Irving, Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS 75 SERVICE AND OPERATION cant.

Trouble-
shooting cont.

MAIN BURNER PROBLEMS

The following are possible causes of main burner problems:

1. Unlevel burner will cause yellow flames.

2. Burning at the orifice indicates main gas valve may not be fully
closing.

3. Incorrect gas pressure; it should be 3.5" for natural gas and 10"
for propane.

4. Soot build-up. Check gas pressure and air flow through heater and
venting.

-

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

33

2

3

1

.~~ -- -

FPS 75 PARTS LIST

RESIDENI'IAL WATER HB.4TER PAR7S LIST

MODELS FP5-75
SERIES: 230/231

R

4

232/233

~

AEUEF VALVE

~

I..~

I

~

r~

Q

5

I~~ 22

~..; ~ I 24

g!

~

25

'-i .

~~

- 3511

5 , .,-.-

A_rccaas CLO- TYPO

-'TYPO - j;k T-.;- ~. -no--

j~;-' ::; =o:Z--"

..,..,---

'-.-

21

~

PRINTeD" U.S.A.

@1995
A.D. Smith
Water Products Co

16

~9

~

7

~

"'"'/'

31

5621 W.115TH STREET, ALSIP, ILUNOIS 604821 1-800-433-2545

19

A.O. SMITH WATER PRODUCTS CO., INC.

17

32

18

-(-! 1
I"i::"'-

I

20

94

PSD -1-269
August 1895

Technical Information

Irving, Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

FPS-75

SERIES 230/231 THRU 232/233

Item

Description

Part Number

1 Anode , 180618-42

Baffle

2 Baffle, Flue ...,..",.",.,."."."... 182193

3 Flue Restrictor '.."'..."'.."'.'.'. 35405

Blower
4 Blower Assembly 182225
5 Blower Wiring Harness 181728-1
6 Fan Housing 182156
7 Bracket, Gas Valve 182179

Burner
8 Air Shutter , 35376
9 Lock Nut 29001

10 Main Burner 41157-4
11 Main Burner Tube. Nat. 39114-4
11 Main Burner Tube. Prop. 181784-2
12 Orifice, Main Burner, Nat. 29366-21

12 Orifice, Main Burner, Prop. ... 181778-39

13 Pilot Assembly, Nat 181954-2
13 Pilot Assembly, Prop. 181954-3
14 Pilot Mounting Plate 192625

15 Pilot Tube ; 23330
16 Collar, Pipe '.""'.'.."""""..'..""'.. 20172-6

17 Cover, Control Panel 182181
18 Dirt Leg (Supp. on Prop. 43761

Door

19 Inner ,.,.,.",..,."..,.",...".",."... 39923
20 Outer 39112-1
21 Extender, T&P Valve 43231-1

Label
22 Flammable Warning 181139
23 Lighting & Operating 182214
24 Scald Warning 181138

25 Module, Ignition 181723

26 Silicone, High Temp 181564

27 Tee, 38 P.V.C 181617

28 Tee, Condensate 181861

29 Thermostat w/E.C.O. 182053-1
30 Tube, Inlet 41072
31 Valve, Drain """".'.' "'."'."'."" 26273-7

Valve

32 Gas, Nat. , 182238

32 Gas, Prop. 182239
33 Wall Plate "."." " "'..' 181557
34 Wire, Ground 77948-9
35 Wire, Harness 182203

@1995
A.D. Smith
Water Products Co.

Technical Information

Irving, Texas95

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

PART INFORMATION

CONTROL MODELS
Fan

FPS40-50
FPSE & FPD40 - 50

FPS75

Air Pressure
Switch

Thermostat

FPS40-50
FPSE & FPD40 - 50

FPS75

FPS40-50
FPSE & FPD40 - 50

FPS75

High Limit

Gas Valve

FPS40-50
FPSE & FPD40 - 50

FPS75

FPS40-50
FPSE & FPD40 - 50

FPS75

Pilot

FPS40-50
FPSE & FPD40 - 50

FPS75

SPECIFICATION
Draws.75 amp, Turns at 3325 RPM

Draws.75 amp, Turns at 3325 RPM
Draws 1.8 amp, Turns at 3000 RPM

Closes at .3 PSI
Closes at .3 PSI
Unavailable at this time

Temperature range no lower limit to 1600

Temperature range 1100 - 1500

Temperature range 1200 - 1600
Opens at 1950

Opens at 1600

Opens at 1950

operating pressure - natl. 3.5" W.C., I.p. 10" w.c.
operating pressure - natl. 3.5" W.C., I.p. 10" w.c.

operating pressure - natl. 3.5" W.C., I.p. 101' w.c
Standing pilot

1.1.0. Draws 1.63 amps

1.1.0. Draws 1.63 amps

Gas Pressure

FPS40-50 Closes at 2.5" w.c. for natural

Switch
Vent High Limit

FPS75

Vent Material All models

@1995
A.D. Smith
Water Products Co

Closes at 6.5" w.c. for propane
Opens at 1900 closes at 1500

PVC (Class 160, ASTM 0-2241; Schedule 40,
ASTM 0-1785, or Cellular Core Schedule 40 OWV,
ASTM F-891), Schedule 40 CPVC (ASTM F-441),
or ASS (ASTM 0-2661) pipe. The fittings other than
the TERMINATION TEE, should be equivalent to

PVC_OWV fittings meeting ASTM 0-2665 (Use
CPVC fittings, ASTM F-438 for CPVC pipe and
ASS fittings, ASTM 0-2661/3311 for ASS pipe. If
CPVC or ASS pipe and fittings are used, then the
proper cement must be used for all joints, including

joining the pipe to the Termination Tee (PVC

Material).

96

Technical Information

Irving, Texas

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

SERVICE CHECKLIST

VI

PROPER SEQUENCE OF OPERATION
A. FPS40 - 50

During standby is blower off?
On a call for heat does gas valve open?
Does gas pressure switch close?
Does the blower come on?
If so, does the air pressure make?
Does the solenoid open?
Does main burner ignite?
Does the thermostat satisfy?

Comments:

A.FPSE40-50

During standby is blower off?
On a call for heat does gas valve open?
Does gas pressure switch close?
Does the blower come on?
If so, does the air pressure make?
Does the solenoid open?
Does main burner ignite?
Does the thermostat satisfy?

Comments:

A. FPD40 - 50

During standby is blower off?
On a call for heat does gas valve open?
Does gas pressure switch close?
Does the blower come on?
If so, does the air pressure make?
Does the solenoid open?
Does main burner ignite?
Does the thermostat satisfy?

yes
yes
yes
yes
yes
yes
yes
yes

yes
yes
yes
yes
yes
yes
yes
yes

yes
yes
yes
yes
yes
yes
yes
yes

no
no
no
no
no
no
no
no

no
no
no
no
no
no
no
no

no
no
no
no
no
no

no
no

A. FPS75

During standby is blower off?
On a call for heat does gas valve open?
Does gas pressure switch close?
Does the blower come on?
If so, does the air pressure make?
Does the solenoid open?
Does main burner ignite?
Does the thermostat satisfy?

@1995

A.D. Smith

Water Products Co

Comments:

Comments

97

yes
yes
yes

yes
yes
yes

yes

yes

Technical Information

no
no

no
no
no

no

no

no

Irving, Texas

VII. SAFETY

A. Gas

Does pilot flame prove before main burner ignites?
Does damper blade fully open before ignition sequence occurs?
Is burner cover plate in place?
Is burner floor shield in place?
Does liD lockout occur after 30 sec. trial for ignition? (Propane models only)

B. Water Temperature

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

i

SERVICE CHECKLIST cant.

yes
yes
yes
yes
yes

no

no
no
no
no

Is the thermostat adjusted to the lowest acceptable temperature?
Does the installation have a mixing valve?

If so, is it operational?

What is the outlet temperature of the mixing valve?

NOTE: (Consumer Product Safety Commission advises that water temperature above

130 degrees F. may cause scalding.)

Is a properly rated temperature and pressure relief valve installed?

C. Electrical
Is the 120 VAG electrical power supply properly wired?

Are all the control covers in place?
Is the 120 VAG electrical power supply properly fused?

D. Flammables
Are flammable materials located in the area of the water heater?

Are flammable vapors loc~ted in the area of the water heater?

Comments:

yes
yes
yes

yes

yes
yes
yes

yes
yes

no
no
no

no

no
no

no

no
no

@1995
A.D. Smith
Water Products Co.

98

Technical Information

Irving, Texas

FPS MODELS

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK

QUESTIONS AND ANSWERS

Q

A.

Q

A.

Q.

A.

Q

A.

What is the CFM of the blower?

Maximum of 60 CFM

Will the blower move more air through the unit than conventional venting and thereby cause
less heat to be transferred into the water?

No. The unit has been tested to the DOE test methods for recovery efficiency using the
minimum and maximum amount of vent piping with the resulting GPH rates as shown on the
spec sheet. The baffle and air intakes of the heater still regulate chamber air flow.

Can this unit be vented to a chimney?

No. The unit may have condensing flue gases which would attack mortar or standard vent

piping.

Can I vent the FPS unit vertically?
The Series 216 & 217 are sidewall venting only.

The Series 220 and higher can be vented either vertically or horizontally.

0,

A.

Will a snow/riser kit be available?
A snow riser kit can be constructed in the field in parts of the country where applicable.

The

venting should be terminated a minimum of 12 inches above expected snowfall

accumulations.

Avoid installations where snow drifting or prevailing wind conditions will interfere with the

venting of the heater. Installation of a condensate tee is necessary to prevent condensation

from reaching the blower housing.

@1995
A.D. Smith
Water Products Co

99

Technical Information

Irving, Texas