Install Instructions

82
13 Troubleshooting
Label all wires prior to disconnection
when servicing controls. Wiring errors
can cause improper and dangerous
operation. Always disconnect power to
the boiler before servicing. Failure to
comply could result in severe personal
injury, death, or substantial property
damage.
Never jumper (bypass) any device except
for momentary testing as outlined in the
Troubleshooting chart. Severe personal
injury, death, or substantial property
damage can result.
Before troubleshooting:
1. Have the following items:
a. Voltmeter that can check 120 vac, 24 vac, and
12 vdc.
b. Continuity checker.
c. Contact thermometer.
2. Check for 120 vac (minimum 102 vac to maximum
132 vac) to boiler.
3. Make sure thermostat is calling for heat and contacts
(including appropriate zone controls) are closed.
Check for 24 vac between thermostat wire nuts and
ground.
4. Make sure all external limit controls are installed and
operating.
Check the following:
1. Wire connectors to control module are securely
plugged in at the module and originating control.
2. Gas pressures:
• Maximum: 14 inches w.c. (natural and LP) with
no flow (lockup) or with boiler on
• Minimum: 4 inches w.c. (natural), 8 inches w.c.
(LP) with gas flowing (verify during boiler
startup)
Check control module fuses
ALWAYS check control module fuses
before replacing control module or any
major components (blower, etc.). If one
of these fuses is blown, it can prevent the
control module or other components from
operating.
1. Turn OFF the power to the boiler at the external line
switch.
2. Remove front door/cover.
3. Remove the control module cover.
4. Inspect fuses F1, F2, and F3, see FIG 13-1 below.
IMG00260
F3 - 0.8 AMP FUSE
24V DC POWER SUPPLY
F1 - 6.3 AMP FUSE
PUMPS
F2 - 3.15 AMP FUSE
BLOWER
Figure 13-1 Control Module Fuses
5. The boiler is shipped with three (3) spare fuses in a plastic bag
provided with the unit.
6. If necessary, replace open fuse (F3 is .80 amps, F2 is 3.15 amps,
and F1 is 6.3 amps).
Note: Fuses F1, F2 and F3 are all slow blow fuses.
Do not jumper fuse or replace with any fuse
except as specified. Failure to comply could
result in severe personal injury, death, or
substantial property damage.
7. Install control module cover and front door/cover after fuse
inspection.
8. Restore power to the boiler at the external line switch and
verify boiler operation (Section 10 - Start-up) after completing
boiler service.
⚠WARNING
⚠WARNING
NOTICE
⚠WARNING
Installation & Service Manual
FIRE TUBE
™
⚠ DANGER
If this boiler may be frozen,
immediately shut off power and gas to
the appliance and contact the factory
for further instructions. Operation
when the heat exchanger, internal pipes,
or pressure relief valves are frozen, will
result in internal pressure build-up and
a deadly steam explosion. Neither the
Freeze Protection feature of the boiler
control module nor the use of glycol
eliminates the possibility of freezing.