Lochinvar Hot Water Generator 5Troubleshooting, Symptom, Probable Cause, Corrective Action

Hot Water Generator Installation and Operation Manual

5Troubleshooting

SYMPTOM

PROBABLE CAUSE

CORRECTIVE ACTION

Water heater

does not

• The

thermometer

is

not

correctly

• Check

the

water

temperature

with

a

maintain the

required

sensing the water temperature.

temperature gauge that is known to be

temperature at the rated

correct.

Replace

the

thermometer

if

it

capacity.

is found to

be

incorrectly sensing

the

water temperature.

• Inlet

energy

source pressure

is

too

• Check

the

primary

energy

source

low or boiler water temperature is too

pressure/temperature.

If

the reading

is

low.

low, adjust the inlet pressure/temperature to

meet the design requirements. If there is a

restriction in the primary energy source

line, the pressure reading will drop

excessively

when

the

generator

calls

for full energy on steam systems, even

though the pressure seems to be

normal during light demand. If the

primary pressure is correct, the system

should

reach

design

pressure

for

energy source in the tube bundle as the

temperature of the water in the tank

heater approaches shutoff.

• Reconfigure

the

condensate

/

water

• The condensate / water return piping

return piping

and check valve to allow

has

not

been

installed

properly,

for

proper

drainage.

Check to

assure

allowing the condensate / water to

that there is no restriction in the

drain

freely

(by

gravity);

the

condensate

/

water

drain

line.

Replace

condensate / water drain line is

the check valve if it is leaking or has

restricted; or the condensate / water

failed.

Also,

check to assure that there

check valve is leaking or has failed.

is no restriction in the condensate /

water drain line.

• Water

bypass valve has not been

• Adjust bypass valve approximately half

adjusted (boiler water).

closed. Readjust as necessary.

• Control valve bulb not installed or not

• Notify factory for replacement.

properly installed in tank bulbwell.

• Control valve actuator defective.

• Verify actuator is not working. Notify factory

for replacement.

Outlet temperature is too

• The

thermometer

is

not

correctly

• Check the water temperature with a

high.

sensing the water temperature.

temperature gauge that is known to be

correct.

Replace

the

thermometer

if

it

is found to be incorrectly sensing the

water temperature.

• The condensate / water return piping

• Reconfigure

the

condensate

/

water

has

not

been

installed

properly,

return piping

and

check

valve

to allow

allowing the

condensate /

water

to

for

proper

drainage.

Check to

assure

drain

freely

(by

gravity);

the

that

there

is

no

restriction

in

the

condensate

/

water

drain

line

is

condensate

/

water

drain

line.

Replace

restricted;

or

the

condensate

/

water

the

check

valve

if

it is

leaking

or

has

check valve is leaking or has failed.

failed. Also, check to assure that there

is no restriction in the condensate /

water drain line.

• Control valve bulb not installed or not

• Verify bulb is installed in bulbwell.

properly installed in tank bulbwell.

• Control valve actuator defective.

• Verify actuator is not working. Notify factory

for replacement.

12