Lochinvar Hot Water Generator operation manual 5Troubleshooting continued, Symptom, Probable Cause

Hot Water Generator Installation and Operation Manual

5Troubleshooting (continued)

SYMPTOM

PROBABLE CAUSE

CORRECTIVE ACTION

Outlet

temperature • Inlet

energy source

pressure

is too

• For steam

systems

check the

primary

fluctuates widely.

low or boiler water temperature is too low.

energy source pressure/temperature. If the

reading is 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.

• 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.

• The primary / inlet temperature control

• Verify control valve bulb was installed in

valve is not closing properly.

the bulbwell.

• Bypass

valve

not

adjusted

(boiler

• Adjust bypass valve approximately half

water).

closed. Readjust as necessary.

• The primary / inlet temperature control

• Verify control valve actuator is working

valve is not opening properly.

properly , if not replace.

Excess or

insufficient

• The

condensate

/ water return piping

• Reconfigure

the

condensate

/

water

condensate (boiler water)

has

not

been

installed

properly,

return piping and check valve

to

allow

being

returned from the

allowing

the condensate / water to

for proper

drainage.

Check to

assure

drain

freely

(by

gravity);

the

that

there

is

no

restriction

in

the

unit.

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.

• Bypass loop valve not adjusted (boiler

• Adjust bypass valve approximately half

water).

closed. Readjust as necesssary.

Steam

being

discharged • The

tube

bundle

is

heavily

scaled

or

• Call

Lochinvar

Corporation,

or

an

into

the

condensate

damaged.

authorized

sales

agent for instructions

drain.

on repair or replacement.

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