background image

16

forming droplets, these drip into the fire or run out on the floor.
This is common at the time of startup after installation, during
periods of time when incoming water is very cold, or the heater
may be undersized for the requirements.

Droplets from the bottom of the flue may be due to corrosive
combustion products or improper vent.  Check with your dealer
for more information.

CATHODIC PROTECTION - ANODE (FIG. 1)

The anode rod within the tank is designed to be slowly consumed
cathodically, minimizing corrosion in the glass lined tank.  A
hydrogen sulfide (rotten egg) odor may result if water contains
high sulfate and/or minerals.  Chlorinating the water supply should
minimize the problem.  (See EXTENDED NON-USE PERIODS).
NOTE: Anode must remain installed (except for inspection) to
avoid shortening tank life.  See LIMITED WARRANTY.  Replace
as necessary.

 

WARNING

: DO NOT BY-PASS ANY CONTROLS TO MAKE HEATER OPERATE.

OPERATE ONLY AS WIRED FROM FACTORY.

TROUBLE SHOOTING

Please check guidelines below.  For your safety, water heater service should be performed only by a qualified service technician.

Read the GENERAL SAFETY INFORMATION section first.

PROBLEM

LED STATUS

CAUSE

SOLUTION

Check for power to heater.

Off

No power to system control.

Check wiring harness for proper connections.
Check for line voltage at harness connectors.

Slow Blink
Bright-Dim

Normal operation

Not applicable.

1 Flash

Setpoint error, internal failure detected.

Replace gas control valve.
Replace pressure switch.

Replace pressure switch.

2 Flashes

Pressure switch failed to open.

Replace blower assembly.

Replace pressure switch.

3 Flashes

Pressure switch failed to close.

Replace blower assembly.

ECO activated.

Replace ECO.

4 Flashes

Blower Assembly is energized.

Replace gas control valve.

Internal hardware failure.

Replace gas control valve.

Insure that burner stays lit.

GAS

Flame signal sensed out of sequence.

Insure that igniter wires are not loose at gas valve.

VALVE

Replace gas control valve.
Insure that burner stays lit.

Blower Assembly is energized.

Insure that igniter wires are not loose at gas valve.
Replace gas control valve.

Gas supply is off or too low to operate.
Damaged or broken HSI element.
Appliance not properly earth ground.
Flame sense rod contaminated or not positioned
correctly.

6 Flashes

System lockout.

HSI element not positioned correctly.
HSI element or flame sense rod wiring not
connected properly.
Less than 100Vac between flame rod and burner
pan with 120Vac input to control.
Cycle external power or remove request for heat
for 2 seconds before reapplying.

Water temperature is below 36°F.

Wait until gas control generates a self-reset.

Rapidly

Loose connection between valve

Make sure connections

blinking

and spud assembly.

are properly seated.

Internal component failure.

Replace gas control valve.

Summary of Contents for FPSH

Page 1: ...hly read this manual before installation and or operation of this water heater Please pay particular attention to the important safety and operating instructions as well as the WARNINGS and CAUTIONS C...

Page 2: ...ith Water Products Company 5621 W 115th Street Alsip IL 60803 1 800 433 2545 When ordering parts provide complete model and serial numbers see rating plate quantity and name of part desired as listed...

Page 3: ...n air flow to the burner Do not cover the instruction manual Keep it on the side of the water heater or nearby for future reference Do obtain new warning and instruction labels from A O Smith for plac...

Page 4: ...ing the free area of a vent opening the blocking effect of screens louvers and grills should be considered Screens shall not be of a mesh smaller than 1 4 inch square If the free area is not known the...

Page 5: ...valve on the appliance discharges periodically this may be due to thermal expansion in a closed water supply system Contact the water supplier or local plumbing inspector on how to correct the situati...

Page 6: ...r also recommends that the vent termination should not be installed closer than 3 feet from an inside corner of an L shaped structure and not be less than 1 foot above grade The vent shall terminate a...

Page 7: ...tallation of total vent system Review the charts on Page9 to make sure that the vent system is within the allowed vent configuration 1 The FPSH FPCR FPST Power Vent Models come with the blower assembl...

Page 8: ...tal vent length for both two 2 and three 3 inch vent pipe See information below on what types of material can be used for pipe and fittings Note Use only vent terminal supplied with unit 3 See the ins...

Page 9: ...same as eight 8 feet of pipe For the three inch vent one 1 90 elbow is approximately the same as five 5 feet of pipe TABLE FOR VENT PIPE LENGTH FOR FPST UNITS TWO INCH DIAMETER PIPE Number of 90 Elbow...

Page 10: ...ons or those of your contractor The solvent welding technique of joining PVC and CPVC pipe is a specialized skill just as any other pipe fitting technique E Closely supervise the installation and insp...

Page 11: ...socket Occasionally when pipe fitting dimensions are at the tolerance extremes it will be possible to fully insert dry pipe to the bottom of the fitting socket When this happens a sufficient quantity...

Page 12: ...ing the heater and piping to be filled Fig 1 M 4 Close the hot water faucet as water starts to flow from the faucet 5 The heater is ready to be operated TEMPERATURE REGULATION WARNING THIS WATER HEATE...

Page 13: ...and to replace any part of the control system and any gas control which has been under water OPERATING INSTRUCTIONS A Set thermostat to the lowest setting B Turn off all electric power to the applian...

Page 14: ...a call for heat from the thermostat 2 The thermostat calls for heat by reading a resistance value within a given range directly proprtional to water temperature 3 The control Module a Checks the press...

Page 15: ...ower unit should be checked periodically for any accumulation of dust and lint Any build up of dirt in the screen can result in insufficient dilution air and excessive vent temperatures that could cau...

Page 16: ...ltage at harness connectors Slow Blink Bright Dim Normal operation Not applicable 1 Flash Setpoint error internal failure detected Replace gas control valve Replace pressure switch Replace pressure sw...

Page 17: ...stall correct orifice A Dirt in burner ports Turn off heater and gas clean burner head B Combustion air path restricted Check intake venting arrangements for YELLOW FLAME obstructions C Not enough dil...

Page 18: ...art thereof including freezing fire floods or lightning any misuse abuse or alteration of it any operation of it in a modified form or any attempt to repair tank leaks or parts will void this warranty...

Reviews: