PB Heat DE User Manual download pdf (Page 35)

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.

4. There must not be signs of continuous wetness at the

chimney. If signs of continuous wetness are

observed, a qualified service agency must be

consulted to modify the vent configuration to prevent

the formation of condensate.

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 combustion and 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 left 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 3.1 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 in Section 7.

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. 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 7E, “Check-Out

Procedure.”

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

described by gas valve and ignition control

manufacturer.

MAINTENANCE

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PB Heat DE User Manual Page 35

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