CSA RA 350, Installation Manual

Page: 45 / 60

Form I-RA/D 350/500, P/N 131090R12, Page 45
Does the fan/blower
operate?
Are the heat
exchanger surfaces
and/or the fan blades or blower
wheel covered with
dirt?
Clean the heat
exchanger and
fan/blower.
Have ducts or
air deflectors been added
to a fan (RA) model? Is the temperature
rise of blower model (RAD) above
70° F?
Remove ducts or deflectors from fan
model. Lower temperature rise on
blower model.
Replace air
discharge limit
(fan/limit assembly).
Check for line
voltage across fan/blower
leads. Is voltage
read?
Replace
fan/blower motor.
Check for line
voltage across Terminals
1 and 2. Is voltage
read?
Replace air
discharge limit
(fan/limit assembly).
Check
wiring.
YES
NO
YES
NO
YES
NO
YES
NO
YES NO
Chart No. 6 - High Temperature Limit Cycles*
*High temperature
limit cycles when
internal temperature
exceeds limit set-
point. Cause must be
found and corrected
for heater to function
safely/properly.
Refer to illustra-
tions on page
46.
Bleed oil from
burner tee bleeder
for ten minutes.
Is stream of oil
perfectly solid and
continuous with no
sign of air?
Are the heat
exchanger tubes restricted
with ash?
Clean the combustion
chamber and heat
exchanger.
Is the fuel of a
type specified for this
heater?
Is the
overfire and flue
draft correct?
Is the CO2
adjustment correct?
Check the air supply
from the compressor to
the nozzle for leaks and
restrictions.
Check the end cone
for deterioration
and/or restrictions.
Check oil delivery
system. See Chart
No. 7.
Adjust for proper
CO2.
Adjust barometric
damper.
Change to a
suitable fuel.
Run vacuum
test on suction line to
check for air leaks. Did suction
line pass vacuum
test?
Repair suction line
leak.
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
Chart No. 5 -
Thermostat
calling for
heat. Burner
operation
erratic/
unstable
flame pattern.
Refer to illustra-
tions on pages
39-40.