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GT INSTALLATION AND OPERATION INSTRUCTIONS Page 39
Problem Detected Problem Solution
Check for voltage at the wires going to the
A-C-T terminals of the Boiler.
Check the magnitude of the line voltage
power supply.
Check the Amp draw of output C1 and Ap
(max 3 Amp).
Check the Amp draw of control on start-up
(max 6 Amps)
Contact Smith.
Check for 120V between terminals L1 and
L2 at Sentry.
If 120V exists turn power off and remove
line voltage harness from Sentry. Then
check for resistance between L1 and L2
of control, if the circuit is open (O.L) the
internal fuse has blown. Check for shorts
in wires leading to circulators prior to
replacing controller.
If 120V not present, check wiring and for
120V at source.
Ensure that the venting lengths are in
compliance with the venting sections
above.
Ensure that the line pressure during
operation does not drop more than 20%
from the static line pressure.
Momentarily remove the intake vent from
the boiler during ignition, if unit lights
smoothly with intake vent disconnected
reconnect and check for proper
combustion if unit maintains smooth
operation after ignition. Calibrate for
proper combustion. If problem persists
contact Smith.
Use fl exible gas line to insolate the
vibration noises between the gas valve
and the line.
Don’t hang gas lines from fl oor joists.
Use rubber insulators with gas line
supports.
If gas valve is not held when the gas
nipple is connected, the force of tightening
the fi tting can damage the valve, and warp
the fan housing.
If pipe is used, the gas line must not
create any forces to the valve, either
vertically (weight of line), or horizontally
(misaligned connection)
Excessive noise, current, or voltage spikes
in the 120V power supply.
No power to control or control failure.
Typically an imbalance in the air to gas
ratio.
Slight vibration can cause noise in the
residence. This is not a warranty issue.
Making a rubbing noise. This is not a
warranty issue.
Sentry Controller
Locks-up
Display Goes Blank
Boiler Lights rough
or pulsates
Fan appears to be
creating a noise in
the housing