9. MAINTENANCE
1.
2.
3.
Disconnect this boiler from the gas supply piping
during any pressure testing of the gas system.
Check pipes adjacent to cold walls or in unheated
spaces. Insulate and tape them if necessary to be
sure they can't freeze up. Keeping the water moving
at all times will reduce the likelihood of freezing. See
Section 3 for antifreeze insiTuctions.
If there is considerable foreign matter in the boiler
water, the boiler should be shut down and allowed to
cool, then drained and thoroughly flushed out, Use
the drain valve at the bottom of the return
connection to drain the boiler. Pipe the drain cock to
a suitable drain or containment device if antifreeze is
used. Flush the system to remove remaining matter.
If there is evidence that hard scale has formed on the
internal surfaces, the boiler should be cleaned by
chemical means as prescribed by a qualified water
treatment specialist.
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Daily boiler observation can be performed by the owner.
If any potential problems are found, a qualified installer
or service technician/agency must be notified.
1.
Remove any combustible materials, gasoline and
other flammable liquids and substances that generate
flammable vapors from the area where the boiler is
contained. Make certain that the boiler area has
ample air for ventilation and that there are no
obstructions to the free flow of air to and from the
boilen
2.
3.
4.
5.
Observe general boiler conditions (unusual noises.
vibrations, etc.)
Observe operating temperature and pressure on the
combination gauge located on the right side of the
boiler. Boiler pressure should never be higher than
5 psi below the rating shown on the safety relief
valve (25 psig maximum for a 30 psig rating, 45 psig
maximum for a 50 psig rating). The valve rating can
be found on the top of the safety relief valve (see
Figure 4 for location of the safely relief valve). Boiler
temperature should never be higher than 250 ° E
Check for water leaks in boiler and system piping.
Smell around the appliance area for gas. If you smell
gas, follow the procedure listed in the Operating
Instructions to shut down appliance in Figure 21.
[4vi_J 4 4 :t li'lll'i_j / I: I :(*] l! 4 ;! IK_i ll..1: I
1. Flush float-type low-water cut-off (if used) to remove
sediment from the float bowl as stated in the
manufacturers instructions
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I Check boiler room floor drains for proper
functioning.
2. Check function of the safety relief valve (monthly
unless specified otherwise by manufacturer) by
performing the following test:
a Check valve piping to determine that it is
properly installed and supported.
b. Check boiler operating temperature and pressure
c. Lift the try lever on the safety relief valve to the
full open position and hold it for at least five
seconds or until clean water is discharged.
d.
Release the try lever and allow the valve to close.
If the valve leaks, operate the lever two or three
times to clear the valve seat of foreign matter. It
may take some time to determine if the valve has
shut completely.
e. If the valve continues to leak. it must be replaced
before the boiler is returned to operation.
f. Check that operating pressure and temperature
have returned to normal
g. Check again to confirm that valve has closed
completely and is not leaking.
3. Test low-water cut-off (if used) as described by the
manufacturer.
4. Test limit as described in Section 7, "Check-Out
Procedure."
5. Test function of gas safety shut-off features as
described by gas valve and ignition control
manufacturer.
28
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