PeerlessBoilers PSC II Installation, Operation & Maintanance Manual Download Page 32

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MAINTENANCE

A. GENERAL

1. Disconnect this boiler from the gas supply piping

during any pressure testing of the gas system.

2. 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 instructions.

3. 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.

B. DAILY (WITH BOILER IN USE)

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
boiler.

2. Observe general boiler conditions (unusual noises,

vibrations, etc.)

3. 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 (35 kPa) below the rating shown on the safety
relief valve (25 psig [172 kPa] maximum for a 30 psig
[207 kPa] rating, 45 psig [310 kPa] maximum for a
50 psig [345 kPa] rating). The valve rating can be
found on the top of the safety relief valve (see Figure
3.4 for location of the safety relief valve). Boiler
temperature should never be higher than 250°F
(121°C).

4. Check for water leaks in boiler and system piping.

5. 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 7.3.

C. WEEKLY (WITH BOILER IN USE)

1. Flush float-type low-water cut-off (if used) to remove

sediment from the float bowl as stated in the
manufacturer’s instructions.

D. MONTHLY (WITH BOILER IN USE)

1. Verify condensate drain trap (loop) has sufficient

water to maintain seal and is not blocked. Fill and/or
unblock as necessary.

2. Check boiler room floor drains for proper functioning.

3. 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.

Check that operating pressure and temperature
have returned to normal.

g. Check again to confirm that valve has closed

completely and is not leaking.

4. Test low-water cut-off (if used) as described by the

manufacturer.

5. Test limit as described in Section 7, “Check-Out

Procedure.”

6. Test function of gas safety shut-off features as

described by gas valve and ignition control
manufacturer.

E. ANNUALLY (BEFORE START OF HEATING