Weil-McLain CGi-3, EG Series 5, PEG Series 5, CGa Series 2, EGH Series 5 User's Information Manual

CGa Series 2, CGi Series 3,
EG Series 5, EGH Series 5,
LGB Series 2, PEG Series 5

Gas-Fired Boilers

User’s

Information

Manual

INSTALLER:

Please take time to review this User’s information
Manual with the boiler owner. Explain all maintenance
and service procedures and the correct Operating
Instructions.

If the information in this manual is not followed exactly, a fire or

explosion may result, causing property damage, personal injury or
loss of life.

Do not store or use gasoline or other flammable vapors and liquids in the
vicinity of this or any other appliance.

WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.

• Do not touch any electrical switch; do not use any phone in your

building.

• Immediately call your gas supplier from a neighbor’s phone. Follow

the gas supplier’s instructions.

• If you cannot reach your gas supplier, call the fire department.

Installation and service must be performed by a qualified installer, service
technician or the gas supplier.

Part Number 550-142-801/1112

CGa, CGi, EG, EGH, LGB, PEG, Boilers

How to use this

manual . . .

Please read this page first

To . . . Read/Use . . . Pages . . .

Learn
precautions

Prevent air
contamination

Identify boiler
components

Maintain
boiler

Start –or–
Shutdown
boiler

Troubleshoot
common
problems

Warnings and denitions

Read list of air contaminants you must avoid. If

found, either remove products permanently
or isolate boiler and provide outside com­bustion air.

The illustration on page 4 or 5, will show you the
location of the main components.

Set up a plan for maintaining the boiler
using the schedule included in this manual.
Schedule an annual start-up by a qualied ser-
vice technician before every heating season.

Use the Operating Instruction sheet for the
gas valve installed on your boiler. Ask your
service technician if you are unsure which
one.

Use the common problems/solutions table to
resolve typical heating system/boiler problems.

1, 2 and 3

3

4-5

6-12

12-19

20

Hazard definitions

The following defined terms are used throughout this manual to bring attention to the presence
of hazards of various risk levels or to important information concerning the life of the product.

Boiler service and

maintenance

2

Indicates presence of hazards that will cause severe personal injury, death

or substantial property damage.

Indicates presence of hazards that can cause severe personal injury, death

or substantial property damage.

Indicates presence of hazards that will or can cause minor personal injury

or property damage.

Indicates special instructions on installation, operation or maintenance that

are important but not related to personal injury or property damage.

The Boiler manual is for use only by a qualified heating installer/service

technician. Refer only to this User’s Information Manual for your reference.
Improper installation, adjustment, alteration, service or maintenance can
cause property damage, personal injury (exposure to hazardous materials)
or loss of life. Installation and service must be performed by a qualified
installer, service agency or the gas supplier (who must read and follow the
supplied instructions before installing, servicing, or removing this boiler.
This boiler contains materials that have been identified as carcinogenic, or
possibly carcinogenic, to humans).

Part Number 550-142-801/1112

STOP!! — Read before proceeding

Products to avoid

Spray cans containing chloro/fluorocar­bons

Permanent wave solutions

Chlorinated waxes/cleaners

Chlorine-based swimming pool chemicals

Calcium chloride used for thawing

Sodium chloride used for water softening

Refrigerant leaks

Paint or varnish removers

Hydrochloric acid/muriatic acid

Cements and glues

Antistatic fabric softeners used in clothes
dryers

Chlorine-type bleaches, detergents, and
cleaning solvents found in household
laundry rooms

Adhesives used to fasten building products
and other similar products

Areas likely to have
contaminants

Dry cleaning/laundry areas and establish­ments

Swimming pools

Metal fabrication plants

Beauty shops

Refrigeration repair shops

Photo processing plants

Auto body shops

Plastic manufacturing plants

Furniture refinishing areas and establish­ments

New building construction

Remodeling areas

Garages with workshops

Failure to adhere to the guidelines on this page can result in severe personal injury, death or substantial

Air contamination

Service and maintenance

User’s Information Manual

property damage.

• To prevent potential of severe personal injury or death, check for products or
areas listed in table at right before installing boiler. If any of these contaminants
are found:

• remove contaminants permanently. — OR —

• isolate boiler and provide outside combustion air. See national, provincial or

local codes for further information.

• To avoid electric shock, disconnect electrical supply before performing
maintenance.

• To avoid severe burns,

• You must maintain the boiler as outlined in the manual and have the boiler

started up and serviced at least annually by a qualified service technician

to ensure boiler/system reliability.

allow boiler to cool before performing maintenance.

Boiler operation

• Do not block flow of combustion or ventilation air to boiler. This boiler is

• Should

• Do not use this boiler if any part has been under water. Immediately call a

•

Boiler water

• DO NOT use petroleum-based cleaning or sealing compounds in boiler system.

•

• Continual fresh

•

equipped with a control which will automatically shut down the boiler should
air or vent be blocked. If vent or air blockage is easily accessible and removable,
remove it. The boiler should attempt to restart within an hour. If blockage is
not obvious or cannot be removed, have the boiler and system checked by a
qualified service technician.

overheating occur or gas supply fail to shut off, do not turn off or

disconnect electrical supply to pump. Instead,
location

external to the appliance.

shut off the gas supply at a

qualified service technician to inspect the boiler and to replace any part of the
control system and any gas control, which has been under water.

Have the building monitored when it is vacant for an extended period. Safety

controls can shut down the boiler at any time. The loss of heat can result in
significant damage due to freezing.

Water seal deterioration will occur, causing leakage between sections and damage
to heating system components. This can result in substantial property damage.

DO NOT use “homemade cures” o r “ boiler patent medicines”. Serious damage

to boiler, personnel and/or property may result.

sections reduces heat transfer, overheats cast iron, and causes section failure.

makeup water will reduce boiler life. Mineral buildup in

Addition of oxygen and other gases can cause internal corrosion. Leaks in boiler
or piping must be repaired at once to prevent makeup water.

Do not add cold water to hot boiler. Thermal shock can cause sections to

crack.

Part Number 550-142-801/1112

3

CGa, CGi, EG, EGH, LGB, PEG, Boilers

Boiler components

CGa CGi

1 Gas valve
2 Pilot burner
3 Main burner
4 Gas manifold/orifices
5 Control module
6 Inducer (CGi only)
7 Vent damper (CGa only)
8 Water temperature sensor
9 Transformer
10 Spill switch (CGa only)
11 Air pressure switch (CGi only)
12 Rollout thermal fuse element
15 Draft hood (CGa only)
16 Circulator
17 Relief valve
18 Gauge (pressure or pressure/temperature)
19 Timer relay (CGi-4 only)

4

Part Number 550-142-801/1112

User’s Information Manual

EG/EGH

LGB

Part Number 550-142-801/1112

1 Gas valve

2 Pilot burner

3 Main burner

4 Gas manifold/orifices

5 Control module

7 Vent damper

9 Transformer

10 Spill switch

12 Rollout thermal fuse element

13 Low water cutoff (steam boilers)

14 Limit control(s)

15 Draft hood

16 Circulator

18 Gauge (pressure or pressure/temperature)

19 Gauge glass (steam only)

5

CGa, CGi, EG, EGH, LGB, PEG, Boilers

Maintain boiler using schedule below

Service technician

(covered in Boiler Manual – for use only by a

qualified service technician)

Inspect:

• Reported problems

• Boiler area

• Air openings

• Flue gas vent system

• Pilot and main burner flames

• Water piping

• Boiler heating surfaces

• Burners, base and inlet air box

• Condensate drain system

up

-

Service:

• Oiled-bearing circulators

stArt

• Temperature sensor

Start-up:

nnuAl

• Perform start-up per manual

A

Check/test:

Owner maintenance

(see following pages for instructions)

Daily

Monthly

Periodically

Every 6 months

• Check boiler area

• Check air openings

• Check boiler pressure/

temperature gauge

• Check boiler interior piping

• Check venting system

• Check air vents

• Check boiler relief valve

• Check automatic air vents (if
used)

• Test low water cutoff (if used)

• Operate relief valve

• Gas piping

• Cold fill and operating pressures

• Air vents and air elimination

• Limit controls and cutoffs

• Expansion tank

• Boiler relief valve

Review:

• Review with owner

Tankless water heater (EG and EGH only)

If boiler is used to supply domestic hot water, limit
control should be set to supply adequate hot water.
Weil-McLain tankless heaters are rated at 200 °F boiler
water temperature. To get rated output, set low limit at
200 °F. Limit can be adjusted to meet system hot water

6

End of season

• Shut down procedure

requirements. Differential can be set to 15 ° and adjusted
to control level. Lowering the differential will cause a
slight variation in water temperature but will decrease
burner on-off cycling. High limit should be set at least
20 ° above low limit.

Part Number 550-142-801/1112

User’s Information Manual

User maintenance procedures

Boiler must be serviced & maintained

The boiler should be inspected and started annually, at

the beginning of the heating season, only by a qualified
service technician. In addition, the maintenance and
care of the boiler designated on page 6 and explained
on the following pages must be performed to assure
maximum boiler efficiency and reliability. Failure to
service and maintain the boiler and system could result
in equipment failure, causing possible severe personal
injury, death or substantial property damage.

Component information

Rollout thermal fuse element

CGa, CGi, EG, & PEG only

Cuts off gas flow should flame rollout occur. See

Figure 1.

Do not attempt to place boiler in operation if rollout

thermal fuse element cuts off gas flow. Immediately
call a service technician. Failure to do so can cause
severe personal injury, death or substantial property
damage.

Spill switch

CGa, EG, & PEG only

Cuts off gas flow should vent system become blocked.
See Figure 2.

Figure 1

Rollout thermal fuse element

Figure 2

Spill switch

The following information provides

detailed instructions for completing
the maintenance items listed in
the maintenance schedule, page 6.
In addition to this maintenance,
the boiler must be serviced and
started up at the beginning of each
heating season by a qualified service
technician.

Do not attempt to place boiler in operation if spill switch

cuts off gas flow. Immediately call a service technician.
Failure to do so can cause severe personal injury, death
or substantial property damage.

❏ Check daily . . . . . . . . . . . . . . . . .

Boiler area

To prevent potential of severe personal injury, death

or substantial property damage, eliminate all materials
discussed below from the boiler vicinity. If found:

• Remove products immediately from the area. If

they have been there for an extended period, call
a qualified service technician to inspect the boiler
and vent system for possible damage from acid
corrosion.

• If products cannot be removed, immediately call

Part Number 550-142-801/1112

a qualified service technician to install an outside
combustion air source for the boiler (if not already
installed).

1. Combustible/flammable materials — Do not
store combustible materials, gasoline or any
other flammable vapors or liquids near the boiler.

Remove immediately if found.

2. Air contaminants — See listing of contaminants on
page 3.

7

CGa, CGi, EG, EGH, LGB, PEG, Boilers

❏ Check daily . . . . . . . . . . . . . . . . .

Pressure/temperature gauge
or pressure gauge (steam)

1. Water boilers — Make sure the pressure reading
on the boiler pressure/temperature gauge does
not exceed 24 psig. Higher pressure may indicate a
problem with the expansion tank or gauge.

2. Steam boilers — Make sure the pressure reading on
the boiler pressure gauge does not exceed 15 psig.
Higher pressure indicates a problem with the gauge
or limit control.

3. Contact a qualified service technician if problem
persists.

Air openings

1. Verify that combustion and ventilation air openings
to the boiler room and/or building are open and
unobstructed.

❏ Check monthly . . . . . . . . . . . . . . . .

Boiler piping

1. Visually inspect for leaks around piping, circulators,
relief valve and other fittings. Immediately call a
qualified service technician to repair any leaks.

Have leaks fixed at once by a qualified service technician.

Continual fresh makeup water will reduce boiler life.
Minerals can build up in sections, reducing heat transfer,
overheating cast iron, and causing section failure.

If flame blows out or flickers severely, the vent

system must be checked for obstructions or
other causes of improper venting.

b. Verify the vent damper (CGa and EG boilers)

opens before burners ignite.

3. Notify your qualified service technician at once if
you find any problem.

Boiler relief valve . . . . . . . . .

Do not use petroleum-based cleaning or sealing

compounds

and system components can occur, resulting in possible
severe personal injury, death or substantial property
damage.

in boiler system. Severe damage to boiler

Venting system

Failure to inspect the vent system as noted above and

have them repaired by a qualified service technician can
result in vent system failure, causing severe personal
injury or death.

1. Visually inspect all parts or the flue gas venting
system for any signs of blockage, leakage or joints
or deterioration of the piping.

2. CGa and EG boilers:
a. With boiler firing, hold a candle or match below

lower edge of draft hood “skirt.” If flame does
not blow out, but burns undisturbed, the vent
system is working properly.

8

1. Inspect the boiler relief valve (see Figure 3) and the
relief valve discharge pipe for signs of weeping or
leakage.

2. If the relief valve often weeps:

• water boilers — the expansion tank may not

be working properly.

• steam boilers — limit control may be set too

high or there may be system problems.

• Immediately contact your qualified service

technician to inspect the boiler and system.

Figure 3 Relief valve

Part Number 550-142-801/1112

User’s Information Manual

❏ Check monthly . . . . . . . . . . . . . . . .

Automatic air vents (if used)

1. See Figure 4.

2. Remove the cap from any
automatic air vent in the
system and check operation by
depressing valve B slightly with
the tip of a screwdriver.

3. If the air vent valve appears to be
working freely and not leaking,
replace cap
way on.

4. Loosen cap A one turn to allow
vent to operate.

5. Have vent replaced if it does not
operate correctly.

A, twisting all the

Figure 4

Automatic air
vent

Pilot burner flame

Proper pilot flame (see Figure 5):

1. Blue flame.

2. Inner cone engulfing thermocouple or thermopile
(standing pilot) or pilot flame sensor (spark-ignited
pilot).

3. Thermocouple or thermopile, or pilot flame sensor
glowing cherry red.

Improper pilot flame:

1. Overfired — Large flame lifting or blowing past pilot
flame sensor.

2. Underfired — Small flame. Inner cone not engulfing
pilot flame sensor.

3. Lack of primary air — Yellow flame tip.

4. Incorrectly heated pilot flame sensor.

Figure 5 Pilot burner and flame, typical

Main burner flame

Proper main burner flame (see Figure 6):

1. Yellow-orange streaks may appear (caused by dust).

Improper main burner flame:

1. Overfired — Large flames.

2. Underfired — Small flames.

3. Lack of primary air — Yellow tipping on flames
(sooting will occur).

Figure 6 Main burner flame, typical

Check condensate drain
system (if used)

1. Inspect condensate drain fittings and tubing. Verify
that condensate can flow freely to drain.

Part Number 550-142-801/1112

9

CGa, CGi, EG, EGH, LGB, PEG, Boilers

❏ Service periodically . . . . . . . . . . . .

Test low water cutoff (all steam boilers)
(water boilers, if installed)

If the system is equipped with a low water cutoff, test the low water cutoff periodically during the heating season.

Float type — See Figure 7

1. Clean float type low water cutoff to clear float
chamber of sediment.

a. Open blowdown valve at bottom control.

b. Drain water into a bucket.

.

Boiler pressure and temperature must be low to avoid

the potential of severe burns from steam or hot water.

2. Check float type low water cutoff for proper
operation.

a. Turn operating control to call for heat.

b. Before water gets hot, drain to bottom of gauge

glass. Boiler should shut off after water level
lowers a few inches.

c. Refill boiler to correct waterline. Boiler should

come back on.

Figure 7 Float type low water cutoff Figure 8 Probe type low water cutoff

Probe type— See Figure 8

1. Clean probe type low water cutoff for proper
operation.

a. Turn off power to boiler and wait 5 minutes.

b. Drain water to bottom of gauge glass.

c. Turn on power.

d. Set thermostat to call for heat. Red neon lamp

on lower water cutoff should light.

e. Wait 5 minutes. Boiler should not fire.

f. Refill boiler to correct water line. Red lamp

should go off.

g. Wait 5 minutes. Boiler should fire.

h. Return thermostat to normal setting.

10

Part Number 550-142-801/1112

User’s Information Manual

❏ Service periodically

continued . . . . . . .

Clean gauge glass

Normal waterline on a steam boiler is halfway up gauge glass. See
Figure 9. Clean when needed.

1. Close lower gauge cock.

2. Open pet cock.

3. Open lower gauge cock and allow a small amount of water to
flush out through open pet cock.

4. Close pet cock.

5. Open lower gauge cock.

6. If gauge glass breaks, close both gauge cocks and call a quali­fied service technician to replace gauge glass.
with thin glass tubing.

Boiler pressure must be low to eliminate po-

tential of severe burns.

Figure 9 Gauge glass

Do not replace

❏ Service every 6

months . . . . . . . .

Operate boiler relief valve

To avoid water damage or scalding due to

valve operation, a metal discharge line must be
connected to relief valve outlet and run to a safe
place of disposal. This discharge line must be
installed by a qualified heating installer or service
technician in accordance with the instructions
in the Boiler Manual.

The discharge line must be terminated so as to

eliminate possibility of severe burns should the
valve discharge.

1. Before proceeding, verify that the relief valve outlet has been
piped to a safe place of discharge, avoiding any possibility of
scalding from hot water.

2. Read the boiler pressure/temperature gauge to make sure the
system is pressurized.

3. Lift the relief valve top lever slightly, allowing water to relieve
through the valve and discharge piping.

Oil inducer motor (CGi boilers)

1. Use only S.A.E. 20 motor oil. DO NOT use household universal
oils.

4. If water flows freely, release the lever and allow the valve to seat.
Watch the end of the relief valve discharge pipe to ensure that
the valve does not weep after the line has had time to drain. If
the valve weeps, lift the seat again to attempt to clean the valve
seat. If the valve continues to weep afterwards, contact your
qualified service technician to inspect the valve and system.

5. If water does not flow from the valve when you lift the lever
completely, the valve or discharge line may be blocked.
Immediately shutdown the boiler, following the instructions
on the inside jacket top Operating Instructions. Call your
qualified service technician to inspect the boiler and system.

Use only S.A.E. 20 motor oil to lubricate the

inducer motor. Do not use common universal
household oils.

2. Place a few drops of oil in each of the two oiler cups on the
inducer motor.

Part Number 550-142-801/1112

11

CGa, CGi, EG, EGH, LGB, PEG, Boilers

❏ End-of-season shutdown . . . . . . . .

Follow boiler shutdown procedure

1. Follow “TO TURN OFF GAS TO APPLIANCE” on the

Operating instructions

on the inside of the jacket
panel. You will also find these instructions on pages
13 through 19 of this manual.

Use the Operating instruction for the gas valve

model installed on the boiler.

2. Do not drain system unless exposure to freezing
temperatures will occur.

3. Do not drain the system if it is filled with an
antifreeze solution.

4. Do not shut down boilers used for domestic water
heating. They must operate year-round.

Propane gas odorant

Propane boilers only — Your propane supplier mixes an odorant with the propane to make its presence detect-

able. In some instances, the odorant can fade and the gas may no longer have an odor.

• Propane gas can accumulate at floor level. Smell near the floor for the gas odorant or any unusual odor.
If you suspect a leak, do not attempt to light the pilot.

• Use caution when attempting to light the propane pilot. This should be done by a qualified service
technician, particularly if pilot outages are common.

• Periodically check the odorant level of your gas.

• Inspect boiler and system at least yearly to make sure all gas piping is leak-tight.

• Consult your propane supplier regarding installation of a gas leak detector. There are some products on
the market intended for this purpose. Your supplier may be able to suggest an appropriate device.

Operating instructions

Table 2

Operating

instruction

guide

Use Table 2 below to locate the correct Operating instruction for the gas valve model installed on your boiler.

Spark-ignited pilot Models Page

CGa-25 thru CGa-8

Honeywell VR8204/VR8304

White-Rodgers 36E

White-Rodgers 36C

Robertshaw 7200

Robertshaw 7000 DERHC EGH-85 thru EGH-125 17

–– LGB 19

EG-30 thru EG-75
PEG-30 thru PEG-55

CGi-3 thru CGi-6 18

CGa-25 thru CGa-6
EG-30 thru EG-50
PEG-30 thru PEG-50

CGi-3 thru CGi-6 18

CGa-7 & CGa-8
EG-55 thru EG-75

PEG-55

CGi-3 thru CGi-6 18

CGa-25 thru CGa-6
EG-30 thru EG-50
PEG-30 thru PEG-50

13

14

15

16

12

Part Number 550-142-801/1112

User’s Information Manual

Operating instructions

• Spark-ignited pilot

• Gas valve

A. This appliance is equipped with an ignition device

which automatically lights the pilot. Do not try
to light the pilot by hand.

B.

BEFORE OPERATING, smell all around the

appliance area for gas. Be sure to smell next to the
floor because some gas is heavier than air and will
settle on the floor. See below.

• Do not try to light any appliance.

• Do not touch any electric switch; do not use any phone in
your building.

— Honeywell VR8204/VR8304

FOR YOUR SAFETY READ BEFORE OPERATING

If you do not follow these instructions exactly, a fire or explosion may result

causing property damage, personal injury or loss of life.

C. Use only your hand to turn the gas control knob. Never use tools. If

D. Do not use this appliance if any part has been under water.
Immediately call a qualified service technician to inspect the appliance

WHAT TO DO IF YOU SMELL GAS

CGa, EG-30 to EG-75,
PEG-30 to PEG-55,

the knob will not turn by hand, don’t try to repair it, call a qualified
service technician. Force or attempted repair may result in a fire or
explosion.

and to replace any part of the control system and any gas control,
which has been under water.

• Immediately call your gas supplier from a neighbor’s phone.
Follow the gas supplier’s instructions.

• If you cannot reach your gas supplier, call the fire
department.

OPERATING INSTRUCTIONS

1. STOP! Read the safety information above on this label.

2. Set the thermostat to lowest setting.

3. Turn off all electrical power to the appliance.

4. Remove from panel.

5. This appliance is equipped with an ignition device which
automatically lights the pilot.
by hand.

6. Turn gas control knob clockwise

Do not try to light the pilot

to “OFF”.

TO TURN OFF GAS TO THE APPLIANCE

1. Set the thermostat to lowest setting.

2. Turn off all electric power to the appliance if service is to
be performed.

7. Wait five (5) minutes to clear out any gas. Then smell for
gas, including near the floor. If you smell gas,

“B” in the safety information above. If you don’t smell gas,

go to the next step.

8. Turn gas control knob counterclockwise to “ON”.

9. Turn on all electric power to the appliance.

10. Set thermostat to desired setting.

11. If the appliance will not operate, follow the instructions

To Turn Off Gas To The Appliance and call your service

technician or gas supplier.

12. Replace front panel.

3. Remove front panel.

4. Turn gas control knob clockwise

5. Replace front panel.

to “OFF”. Do not force.

STOP! Follow

550-223-041(0906)

Part Number 550-142-801/1112

13

CGa, CGi, EG, EGH, LGB, PEG, Boilers

Operating instructions

• Spark-ignited pilot

• Gas valve — White-Rodgers 36E

FOR YOUR SAFETY READ BEFORE OPERATING

If you do not follow these instructions exactly, a fire or explosion may result

causing property damage, personal injury or loss of life.

A. This appliance is equipped with an ignition device

which automatically lights the pilot. Do not try
to light the pilot by hand.

B. BEFORE OPERATING, smell all around the

appliance area for gas. Be sure to smell next to the
floor because some gas is heavier than air and will
settle on the floor. See below.

WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.

• Do not touch any electric switch; do not use any phone in
your building.

C. Use only your hand to turn the gas control knob. Never use tools. If

D. Do not use this appliance if any part has been under water.
Immediately call a qualified service technician to inspect the appliance

CGa-25 to CGa-6,
EG-30 to EG-50,
PEG-30 to PEG-50

the knob will not turn by hand, don’t try to repair it, call a qualified
service technician. Force or attempted repair may result in a fire or
explosion.

and to replace any part of the control system and any gas control,
which has been under water.

• Immediately call your gas supplier from a neighbor’s phone.
Follow the gas supplier’s instructions.

• If you cannot reach your gas supplier, call the fire
department.

OPERATING INSTRUCTIONS

1.

STOP! Read the safety information above on this label.

2. Set the thermostat to lowest setting.

3. Turn off all electrical power to the appliance.

4. Remove front panel.

5. This appliance is equipped with an ignition device which
automatically lights the pilot.
by hand.

6. Turn gas control knob clockwise

Do not try to light the pilot

to “OFF”.

TO TURN OFF GAS TO THE APPLIANCE

1. Set the thermostat to lowest setting.

2. Turn off all electric power to the appliance if service is to
be performed.

7. Wait five (5) minutes to clear out any gas. Then smell for
gas, including near the floor. If you smell gas, STOP! Follow

“B” in the safety information above. If you don’t smell gas,

go to the next step.

8. Turn gas control knob counterclockwise to “ON”.

9. Turn on all electric power to the appliance.

10. Set thermostat to desired setting.

11. If the appliance will not operate, follow the instructions

To Turn Off Gas To The Appliance and call your service

technician or gas supplier.

12. Replace front panel.

3. Remove front panel.

4. Turn gas control knob clockwise to “OFF”. Do not force.

5. Replace front panel.

550-223-042(0906)

14

Part Number 550-142-801/1112

User’s Information Manual

Operating instructions

• Spark-ignited pilot

• Gas valve — White-Rodgers 36C

FOR YOUR SAFETY READ BEFORE OPERATING

If you do not follow these instructions exactly, a fire or explosion may result

causing property damage, personal injury or loss of life.

A. This appliance is equipped with an ignition device

which automatically lights the pilot. Do not try
to light the pilot by hand.

B. BEFORE OPERATING, smell all around the

appliance area for gas. Be sure to smell next to the
floor because some gas is heavier than air and will
settle on the floor. See below.

WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.

• Do not touch any electric switch; do not use any phone in
your building.

C. Use only your hand to depress or turn the gas control knob. Never

D. Do not use this appliance if any part has been under water.
Immediately call a qualified service technician to inspect the appliance

CGa-7, CGa-8,
EG-55 to EG-75,
PEG-55,

use tools. If the knob will not depress or turn by hand, don’t try to
repair it, call a qualified service technician. Force or attempted repair
may result in a fire or explosion.

and to replace any part of the control system and any gas control,
which has been under water.

• Immediately call your gas supplier from a neighbor’s phone.
Follow the gas supplier’s instructions.

• If you cannot reach your gas supplier, call the fire
department.

OPERATING INSTRUCTIONS

STOP! Read the safety information above on this label.

1.

2. Set the thermostat to lowest setting.

3. Turn off all electrical power to the appliance.

4. Remove front panel.

5. This appliance is equipped with an ignition device which
automatically lights the pilot. Do not try to light the pilot
by hand.

6. Depress gas control knob slightly and turn clockwise
to “OFF”. Note: Knob cannot be turned to “OFF” unless
knob is depressed slightly. Do not force.

TO TURN OFF GAS TO THE APPLIANCE

1. Set the thermostat to lowest setting.

2. Turn off all electric power to the appliance if service is to
be performed.

7. Wait five (5) minutes to clear out any gas. Then smell for
gas, including near the floor. If you smell gas,

“B” in the safety information above. If you don’t smell gas,

go to the next step.

8. Turn gas control knob counterclockwise to “ON”.

9. Turn on all electric power to the appliance.

10. Set thermostat to desired setting.

11. If the appliance will not operate, follow the instructions

To Turn Off Gas To The Appliance and call your service

technician or gas supplier.

12. Replace front panel.

3. Remove front panel.

4. Depress gas control knob slightly and turn clockwise
to “OFF”. Do not force.

5. Replace front panel.

STOP! Follow

550-223-043(0906)

Part Number 550-142-801/1112

15

CGa, CGi, EG, EGH, LGB, PEG, Boilers

Operating instructions

• Spark-ignited pilot

• Gas valve — Robertshaw 7200

CGa-25 to CGa-6,
EG-30 to EG-50,
PEG-30 to PEG-50

16

Part Number 550-142-801/1112

User’s Information Manual

Operating instructions

• Spark-ignited pilot

• Gas valve — Robertshaw 7000DERHC

EGH-85 to EGH-125,

Part Number 550-142-801/1112

17

CGa, CGi, EG, EGH, LGB, PEG, Boilers

Operating instructions

CGi

• Spark-ignited pilot

• Gas valve — Honeywell VR8204/VR8304, White-Rodgers 36C and 36E

FOR YOUR SAFETY READ BEFORE OPERATING

If you do not follow these instructions exactly, a fire or explosion may result

causing property damage, personal injury or loss of life.

A. This appliance does not have a pilot. It is equipped

with an ignition device which automatically lights
the burner. Do not try to light the burner by
hand.

B. BEFORE OPERATING, smell all around the

appliance area for gas. Be sure to smell next to the
floor because some gas is heavier than air and will
settle on the floor. See below.

WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.

• Do not touch any electric switch; do not use any
phone in your building.

C. Use only your hand to turn the gas control knob. Never use

tools. If the knob will not turn by hand, don’t try to repair it,
call a qualified service technician. Force or attempted repair
may result in a fire or explosion.

D. Do not use this appliance if any part has been under water.

Immediately call a qualified service technician to inspect the
appliance and to replace any part of the control system and any
gas control, which has been under water.

• Immediately call your gas supplier from a neighbor’s phone.
Follow the gas supplier’s instructions.

• If you cannot reach your gas supplier, call the fire
department.

OPERATING INSTRUCTIONS

1. STOP ! Read the safety information above on this label.

2. Set the thermostat to lowest setting.

3. Turn off all electrical power to the appliance.

4. Remove jacket front panel.

5. This appliance is equipped with an ignition device which automatically lights the burner.
Do not try to light the burner by hand.

6. Turn

7. Wait five (5) minutes to clear out any gas. Then smell for gas, including near the floor.

8. Turn Gas control knob counterclockwise to “ON”.

9. Turn on all electric power to the appliance.

10. Set thermostat to desired setting.

11. If the appliance will not operate, follow the instructions “TO TURN OFF GAS TO

12. Replace jacket front panel.

Gas control knob clockwise to “OFF”.

If you smell gas,
gas, go to the next step.

APPLIANCE

STOP ! Follow “B” in the safety information above. If you don’t smell

” below and call your service technician or gas supplier.

TO TURN OFF GAS TO THE APPLIANCE

1. Set the thermostat to lowest setting.

2. Turn off all electric power to the appliance if service is to
be performed.

18

3. Remove jacket front panel.

4. Turn Gas control knob clockwise to “OFF”.
Do not force.

5. Replace jacket front panel.

Part Number 550-142-801/1112

User’s Information Manual

Operating instructions

• Spark-ignited pilot

LGB

Part Number 550-142-801/1112

19

Weil-McLain

500 Blaine Street

Michigan City, IN 46360-2388

http://www.weil-mclain.com

Common problems and solutions

Symptom Common Causes Possible Corrections

Rapid cycling —
boiler turns on and
off frequently

Thermostat installed where drafts
or heat affect reading

Locate thermostat on inner wall away from heat sources or cool
drafts.

Heat anticipator in thermostat
adjusted incorrectly

Adjust thermostat per manufacturer's instructions.

Incorrect limit setting Set limit according to system needs. Maximum setting is 220°F.

Increase limit setting to decrease cycling.

Insufficient water flow through
boiler

Check all valves to and from boiler. Return to proper setting.

Confirm circulator size.

Frequent release of
water through relief
valve

Expansion tank sized too small Call qualified service technician to check expansion tank

operation and size.

Flooded expansion tank Call qualified service technician to check expansion tank

operation.

Inoperative limit control Call qualified service technician to replace limit control.

Need to frequently
add makeup water

Leaks in boiler or piping Have qualified service technician repair leaks at once to avoid

constant use of makeup water. Makeup water can cause
mineral deposits which, in turn, can cause boiler section failure.
Do not use petroleum-base stop-leak compounds.

Black water
condition

Oxygen corrosion due to leaks in
boiler and piping

Have qualified service technician repair at once. Keep pH of
water between 7.0 to 8.5.

Popping or
percolating noise
heard in boiler

Mineral deposits in sections due
to constant use of makeup water

Call qualified service technician to de-lime boiler, if necessary.
In some cases, deposits will be too heavy to remove with de­liming procedures.

Have qualified service technician repair leaks to eliminate need
for constant makeup water.

Incorrect pH of boiler water Call qualified service technician to check pH level and correct.

pH should be maintained between 7.0 to 8.5.

Insufficient water flow through
boiler

Check all valves to and from boiler. Return to proper setting.

Confirm circulator size.

Metal flakes found in
vent outlet or vent —
flueway corrosion

Contaminated combustion air
supply — See page 3 in this
manual.

Remove any contaminating products. See page 3 in this
manual.

Provide outside air for combustion.

Condensation of combustion
gases in boiler sections

Have qualified service technician inspect system piping and
controls to verify proper regulation of return water temperature.

Some radiators or
baseboard units do
not heat or are noisy

Air in system Bleed air from system through air vents in radiators or

baseboard units.

Low system pressure Fill to correct pressure.

Check for leaks in boiler or piping. Have qualified service
technician repair at once.

High limit set too low Adjust high limit to higher setting.

20

Part No. 550-142-801/1112