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Warning – Pennco 15B045FE User Manual

Page 23

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23

Thermostat actuates on call for heat, completing circuit

to control. Completed circuit to control will first activate

circulator. Control will first monitor water temperature

with circulator running to determine if thermostat can be

satisfed without firing burner; if not it will activate damper

which closes end switch inside damper. Action completes

circuit to ignition system and ignition takes place.

In event boiler water temperature exceeds high limit

setting on boiler mounted high limit control, power is

interrupted between control system and ignition system.

Power remains off until boiler water temperature drops

below high limit setting. Circulator continues to operate

under this condition until thermostat is satisfied.

In event flow of combustion products through boiler venting

system becomes blocked, blocked vent safety switch shuts

main burner gas off. Similarly, if boiler flue-way becomes

blocked, flame rollout safety switch shuts main burner

gas off. See Figure 15. If either of these conditions occur,

do not attempt to place boiler back into operation.

Contact certified service agency.

Before seasonal start-up, have certified service agency

check boiler for soot and scale in flues, clean burners and

check gas input rate to maintain high operating efficiency.

WARNING

Label all wires prior to disconnection when servicing

controls. Wiring errors could cause improper and

dangerous operation.

!

Verify proper operation after service.
Service agency will verify system is filled with water to

minimum pressure and open air vents, if used, to expel any

air accumulated in the system. Check piping system and, if

leaks are found, have them repaired immediately.
Check and maintain circulators. Refer to circulator

manufacturer's instructions.
Inspect venting system at the start of each heating

season. Check vent pipe from boiler to chimney for signs of

deterioration by rust or sagging joints. Repair if necessary.

Remove vent pipe at base of chimney or flue and using

mirror, check vent for obstruction and verify vent is in good

working order.
Inspect boiler flue gas passageways by a light and mirror.

Remove burner door. Place trouble lamp in flue collector

through draft relief opening. With mirror positioned above

burners, flue gas passageways can be checked for soot or

scale. See Figure 15.

Follow the following procedure to clean flue gas

passageways:

1.

Remove burners from combustion chamber by raising

burners up from manifold orifices and pulling toward

front of boiler. See Figure 17, Page 22.

2.

Disconnect vent pipe from draft hood.

3.

Remove top jacket panel.

4.

Remove combination flue collector and draft hood from

boiler castings by loosening nuts on hold down bolts

located on each side of collector. See Figure 15.

5.

Place sheet of heavy paper or similar material over

bottom of base and brush down flue passageways. Soot

and scale will collect on paper and is easily removed

with the paper.

6.

With paper still in place in base, clean top of boiler

castings of boiler putty or silicone used to seal between

castings and flue collector. Verify chips are not lodged

in flue passageways.

When cleaning process is complete, restore boiler

components to their original position. Use IS-808 GE

silicone to seal around flue collector and boiler castings.

13 - NORMAL SEQUENCE OF OPERATION

14 - GENERAL INSTRUCTIONS

Figure 15

- Blocked Vent Safety Switch, Roll-out

Safety Switch

Rollout Switch 4

Section Boiler

Rollout Switch

2,3,5,6,7

Section Boiler

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