Columbia CEG-C Instruction manual

P/N# 37411601, Rev. B [05/2012]
H
CEG-C
GAS FIRED BOILERS
FOR STEAM HEATING
INSTALLATION, OPERATION &
MAINTENANCE MANUAL
COLUMBIA COMPANY
Main offices and factory
Pottstown, PA

2
TABLE OF CONTENTS
H
C.S.A. Certified
for Natural gas
or Propane
Tested for 100 psi.
ASME Working
Pressure
KEEP THIS MANUAL NEAR BOILER
RETAIN FOR FUTURE REFERENCE
SERIES CEG-C
CAST IRON
GAS FIRED BOILERS
INSTALLATION MANUAL AND
OPERATING INSTRUCTIONS
Safety Symbols ........................................................................................................................... 3
Installation Procedure ................................................................................................................. 4
Ventilation & Combustion Air ......................................................................................................... 5
Connecting Supply And Return Piping ............................................................................................. 6
Vent Installation .......................................................................................................................... 8
Vent System Modification.............................................................................................................. 9
Vent Damper Installation .............................................................................................................10
Connecting Gas Service...............................................................................................................11
Electrical Wiring .........................................................................................................................12
Thermostat Installation ...............................................................................................................12
Wiring Diagrams And Component Coding .......................................................................................13
Lighting Instructions ..................................................................................................................16
Normal Sequence Of Operation.....................................................................................................18
Connecting Supply And Return Piping, Water Chilled Medium ..........................................................19
General Instructions ...................................................................................................................20
Cleaning Boiler Flue-Ways............................................................................................................21
Maintaining Your Boiler................................................................................................................22
CEG-C Replacement Parts ............................................................................................................24

3
SAFETY SYMBOLS
The following defined symbols are used throughout
this manual to notify the reader of potential hazards
of varying risk levels.
!
DANGER
Indicates a hazardous situation which,
if not avoided, WILL result in death or
serious injury.
!
WARNING
Indicates a hazardous situation which,
if not avoided, could result in death or
serious injury.
!
CAUTION
Indicates a hazardous situation which,
if not avoided, may result in minor or
moderate injury.
NOTICE
Indicates information which should be
followed to ensure proper installation and
operation.
READ ALL INSTRUCTIONS BEFORE
INSTALLING.
!
WARNING
Keep boiler area clear and free from
combustible materials, gasoline and
other flammable vapors and liquids.
DO NOT obstruct air openings to the
boiler room.
Modification, substitution or elimination
of factory equipped, supplied or specified
components may result in property
damage, personal injury or the loss of
life.
To the owner: Installation and service
of this boiler must be performed by a
qualified installer.
To the installer: Leave all instructions
with the boiler for future reference.
When this product is installed in the
Commonwealth of Massachusetts the
installation must be performed by a
Licensed Plumber or Licensed Gas Fitter.
!
WARNING
All installations of boilers and venting
should be done only by a qualified expert
and in accordance with the appropriate
Utica Boilers Installation, Operation
and Maintenance manual. Installing
or venting a boiler or any other gas
appliance with improper methods or
materials may result in serious injury
or death due to fire or to asphyxiation
from poisonous gases such as carbon
monoxide which is odorless and invisible.

4
INSTALLATION PROCEDURE
!
WARNING
Improper installation, adjustment,
alteration, service or maintenance can
cause injury.
• The installation must conform to the requirements
of the authority having jurisdiction or, in absence
of such requirements, to the latest revision of the
National Fuel Gas Code, ANSI Z223.1/NFPA 54.
Reference should also be made to local gas utility
regulations and other codes in effect in the area
that the installation is to be made.
• Where required by the authority having
jurisdiction, the installation must conform to the
Standard for for Controls and Safety Devices For
Automatically Fired Boilers, ANSI/ASME CSD-1.
• This boiler is classified as a Category I appliance
and the vent installation shall be in accordance
with “Venting of Equipment” of the National Fuel
Gas Code noted above or applicable provisions of
the local building codes. See Vent Installation on
page 8.
• This boiler meets safe lighting and other
preference criteria with the gas manifold and
control assembly provided on the boiler per the
latest revision of ANSI Z21.13.
• This boiler shall be installed such that the gas
ignition system components are protected from
water (dripping, spraying, rain, etc.) during
appliance operation and service, (circulator
replacement, condensate trap, control
replacement, etc.).
• LOCATE BOILER on level, solid base as near
chimney as possible and centrally located with
respect to the heat distribution system as
practical.
• ALLOW 24 inches at the front and right side for
servicing and cleaning.
• When installing in a utility room, the door should
be wide enough to allow the largest boiler part
to enter, or to permit replacement of another
appliance such as a water heater.
• FOR INSTALLATION ON NONCOMBUSTIBLE
FLOORS ONLY. *The boiler must not be installed
on carpeting. Minimum clearances to combustible
construction are:
Minimum Clearances to Combustible Construction
Top 24 inch
Front Alcove
Flue collector 6 inch
Rear 18 inch
Sides 6 inch
Note: Greater clearances for access should supersede
fire protection clearance.

5
VENTILATION & COMBUSTION AIR
!
WARNING
Air openings to combustion area must
not be obstructed. Following instructions
below, adequate combustion air can be
maintained.
Provide combustion air and ventilation air in
accordance with the section “Air for Combustion and
Ventilation,” of the National Fuel Gas Code, ANSI
Z223.1 / NFPA 54, or applicable provisions of local
building codes.
Provide make-up air where exhaust fans, clothes
dryers, and kitchen ventilation equipment interfere
with proper operation.
National Fuel Gas Code recognizes several methods
of obtaining adequate ventilation and combustion air.
Requirements of the authority having jurisdiction may
override these methods.
• Engineered Installations. Must be approved by
authority having jurisdiction.
• Mechanical Air Supply. Provide minimum of
0.35 cfm per Mbh for all appliances located
within space. Additional requirements where
exhaust fans installed. Interlock each appliance
to mechanical air supply system to prevent main
burner operation when mechanical air supply
system not operating.
• All Indoor Air. Calculate minimum volume for all
appliances in space. Use a different method if
minimum volume not available.
A. Standard Method. Cannot be used if known
air infiltration rate is 0.40 air changes per
hour. See Table 1 for space with boiler only.
Use equation for multiple appliances.
Volume ≥50 ft3x Total Input [Mbh]
B. Known Air Infiltration Rate. See Table 1
for space with boiler only. Use equation
for multiple appliances. Do not use an air
infiltration rate (ACH) greater than 0.60.
Volume ≥21 ft3⁄ACH x Total Input [Mbh]
C. Refer to National Fuel Gas Code for opening
requirements between connected indoor
spaces.
• All Outdoor Air. Provide permanent opening(s)
communicating directly or by ducts with outdoors.
A. Two Permanent Opening Method. Provide
opening commencing within 12 inches of top
and second opening commencing within 12
inches of bottom of enclosure.
Direct communication with outdoors or
communicating through vertical ducts.
Provide minimum free area of 1 in² per 4
Mbh of total input rating of all appliances
in enclosure.
Communicating through horizontal ducts.
Provide minimum free area of 1 in² per 2
Mbh of total input rating of all appliances
in enclosure.
B. One Permanent Opening Method. Provide
opening commencing within 12 inches of top
of enclosure. Provide minimum clearance of
1 inch on sides/back and 6 inches on front
of boiler (does not supersede clearance to
combustible materials).
C. Refer to National Fuel Gas Code for additional
requirements for louvers, grilles, screens and
air ducts.
• Combination Indoor and Outdoor Air. Refer
to National Fuel Gas Code for application
information.
Table 1 - Minimum Room Volume, Indoor Air Only*
Input Mbh Standard
Method
Known Air Infiltration Rate Method (Air Changes Per Hour)
0.1 .02 .03 .04 .05 .06
112.5 5625 23625 11813 7875 5906 4725 3938
150 7500 31500 15750 10500 7875 6300 5250
187 9350 39270 19635 13090 9818 7854 6545
255 11250 47250 23625 15750 11813 9450 7875
262.5 13125 55125 27563 18375 13781 11025 9188
300 15000 63000 31500 21000 15750 12600 10500
* Table values based on boiler only. Add volume for any additional appliances.

6
CONNECTING SUPPLY AND RETURN PIPING
• Suggested piping for steam heating system can
be seen in figure 1 below. Actual piping may vary
based on system design and local conditions.
• Suggested piping for a modular steam boiler can
be seen in figures 2 and 3 on page 7. Actual
piping may vary based on system design and local
conditions.
• Refer to pages 21 & 22 for procedures on cleaning
and skimming off impurities.
• "Near Boiler Piping" is crucial for proper
performance of a replacement steam boiler and
should always be considered as part of the boiler
installation. Always be sure to include clean-
out and skimming tees in the near boiler piping.
These "Tees" are necessary for proper cleaning
and servicing of the boiler.
• For further piping information refer to the I=B=R
installation piping guide.
Figure 1 - SUGGESTED PIPING FOR A SINGLE STEAM BOILER HEATING SYSTEM

7
CONNECTING SUPPLY AND RETURN PIPING
Figure 2 - SUGGESTED PIPING FOR A MODULAR STEAM BOILERS - Pumped Returns
Figure 3 -SUGGESTED PIPING FOR A MODULAR STEAM BOILERS - Gravity Returns

8
VENT INSTALLATION
!
WARNING
Boiler shall not be connected to any
portion of mechanical draft system
operating under positive pressure.
• The vent pipe must slope upward from the boiler
not less than 1/4 inch for every 1 foot to the vent
terminal.
• Horizontal portions of the venting system shall be
supported rigidly every 5 feet and at elbows. No
portion of the vent pipe should have dips or sags.
• This boiler series is classified as a Category I
appliance and the vent installation shall be in
accordance with “Venting of Equipment” of the
National Fuel Gas Code, ANSI Z223./NFPA, or
applicable provisions of the local building codes.
• Inspect chimney to make certain it is constructed
according to National Board of Fire Underwriters.
• Attach draft hood to flue collector at rear of
boiler, (See figure 4, below), with sheet metal
screw(s) through hole(s) provided. The vent
or vent collector shall be Type B or metal pipe
having resistance to heat and corrosion not less
than that of galvanized sheet steel or aluminum
not less than 0.016 inch thick (No. 28 GA). Do not
modify draft hood.
• Connect flue pipe same as draft hood to chimney.
Bolt or screw joints together to avoid sag. Flue
pipe should not extend beyond inside wall of
chimney. Do not install manual damper in flue
pipe or reduce size of flue outlet except as
provided by the latest revision of ANSI Z223.1.
Protect combustible ceiling and walls near flue
pipe with fireproof insulation. Where two or more
appliances vent into a common flue, the area of
the common flue must be at least equal to the
area of the largest flue plus 50 percent of the
areas of each additional flue.
!
WARNING
Installations of boilers and venting
should be done only by a qualified expert
and in accordance with the appropriate
Utica Boiler’s Installation, Operation
and Maintenance Manual. Installing
or venting a boiler or any other gas
appliance with improper methods or
materials may result in serious injury
or death due to fire or to asphyxiation
from poisonous gases such as carbon
monoxide which is odorless and invisible.
Figure 4 Blocked Vent Safety Switch

9
VENT SYSTEM MODIFICATION
When an existing boiler is removed from a common
venting system, the common venting system is likely
to be too large for the proper venting of the appliances
remained connected to it. If this situation occurs, the
following test procedure must be followed:
At the time of removal of an existing boiler, the
following steps shall be followed with each appliance
remaining connected to the common venting system
placed in operation, while the other appliances
remaining connected to the common venting system
are not in operation.
• Seal any unused openings in the common venting
system.
• Visually inspect the venting system for proper
size and horizontal pitch and determine there is
no blockage or restriction, leakage, corrosion and
other deficiencies which could cause an unsafe
condition.
• Insofar as is practical, close all building doors
and windows and all doors between the space in
which the appliances remaining connected to the
common venting system are located and other
spaces in the building. Turn on clothes dryers
and any appliance not connected to the common
venting system. Turn on any exhaust fans, such
as range hoods and bathroom exhausts, so they
will operate at maximum speed. Do not operate a
summer exhaust fan. Close fireplace damper.
• Place in operation the appliance being inspected.
Follow the lighting instructions. Adjust thermostat
so appliance will operate continuously.
• Test for spillage at the draft hood relief opening
after 5 minutes of main burner operation. Use
the flame of a match or candle, or smoke from a
cigarette, cigar or pipe.
• After it has been determined that each appliance
remaining connected to the common venting
system properly vents when tested as outlined
above, return doors, windows, exhaust fans,
fireplace dampers, and any other gas burning
appliance to their previous condition of use.
• Any improper operation of the common venting
system should be corrected so the installation
conforms with the latest revision of the National
Fuel Gas Code, ANSI Z223.1/NFPA 54. When re-
sizing any portion of the common venting system,
the common venting system should be re-sized
to approach the minimum size as determined
using the appropriate tables in Chapter 13 of the
National Gas Fuel Code, ANSI Z223.1/NFPA 54.

10
VENT DAMPER INSTALLATION
Vent Damper Installation
Note: Refer To Figure 5 Below For Steps 1-7
1. Place Vent Damper on or as close to vent outlet of
boiler as possible. Do not modify vent damper.
2. Remove Locknut from connector at the free end
of the Damper wire harness.
3. Feed Damper connector and Damper wire harness
through bracket hole on Damper Motor frame.
4. Replace and tighten locknut onto Damper wire
harness connector.
5. Plug Damper connector into socket on Damper
Motor frame.
6. Ensure that only the boiler is serviced by the Vent
Damper. See figure 6.
Figure 5 - Standard Vent Damper Installation Figure 6 - Alternate Vent Damper Installation
7. Clearance of not less than 6 inches between
Vent Damper and combustible construction must
be maintained. Additional clearance should be
allowed for service of the Vent Damper.
8. Vent Damper must be in open position when
appliance main burners are operating.
9. The Vent Damper position indicator must be in a
visible location following installation.
10. The thermostats heat anticipator must be
adjusted to match the total current draw of
all controls associated with the boiler during a
heating cycle.
11. The Vent Damper wire harness may be removed
and installed in flexible metal conduit if local
codes or jurisdiction requires. If this is necessary,
the flexible metal conduit must be mounted to
a J-box and all appropriate connections must be
made to this J-box.

11
CONNECTING GAS SERVICE
• Connect gas service meter to control assembly in
accordance with the latest revision of the National
Fuel Gas Code ANSI Z223.1/NFPA 54 and local
codes or utility.
• Ground joint union should be installed for easy
removal of gas control for servicing.
• Drip or trap must be installed at the bottom of a
vertical section of piping at the inlet to the gas
valve.
• Pipe compound resistant to the action of liquefied
petroleum gases must be used on all threaded
pipe connections.
• Check with the local utility for location of manual
shutoff valve if required. See figure 7.
• Gas line should be of adequate size to prevent
undue pressure drop and never smaller than the
pipe size of the main gas control valve.
• Boiler and its gas connection must be leak tested
before placing the boiler in operation. To check
for leaks in gas piping, use a soap and water
solution or other approved method.
!
WARNING
Do not use an open flame.
• Boiler and its individual shutoff valve must be
disconnected from the gas supply piping system
during any pressure testing of that system at
test pressures in excess of 1/2 psi (3.5 kPa). The
boiler must be isolated from the gas supply piping
system by closing its individual manual shutoff
valve during any pressure testing of the gas
supply piping system at test pressures equal to or
less than 1/2 psig (3.5 kPa).
Figure 7 Gas Drip Let

12
ELECTRICAL WIRING
SEE PAGE 14 FOR WIRING DIAGRAMS AND COMPONENT CODING
!
WARNING
Boiler, when installed, must be electrically
bonded to ground in accordance with
the requirements of the authority having
jurisdiction or, in the absence of such
requirements, with the National Electrical
Code, ANSI/NFPA 70.
Install a fused disconnect switch between
boiler and meter at a convenient location.
Electrical wiring must conform with the latest revision
of the National Electrical Code, ANSI/NFPA No. 70 and/
or local authority having jurisdiction.
THERMOSTAT INSTALLATION
• Thermostat should be installed on an inside wall
at least two feet from a non-insulated or outside
wall, approximately four feet above the floor.
• NEVER install a thermostat on an outside wall.
• Do not install a thermostat where it will be
affected by:
A. Drafts
B. Hot or cold pipes
C. Sun light
D. Lighting fixtures
E. Television
F. Fireplace or chimneys
• Check thermostat operation by raising and
lowering thermostat as required to start and stop
the burners.
• Instructions for the final adjustment of the
thermostat are packaged with the thermostat
(adjusting heating anticipator, calibration, etc.).

13
WIRING DIAGRAMS AND COMPONENT CODING
!
CAUTION
Label all wires prior to disconnection when servicing controls. Wiring errors can cause
improper and dangerous operation.
Verify proper operation after servicing.
STEAM CONTROL AND INTERMITTENT IGNITION WIRING FOR PEG SERIES BOILER

14
WIRING DIAGRAMS AND COMPONENT CODING
TH-1 THERMOSTAT (MILLIVOLT)
TH-2 THERMOSTAT (24 VOLT)
TH-3 THERMOSTAT (LINE VOLTAGE)
TR-1 TRANSFORMER (120V/24V 40VA)
TR-2 TRANSFORMER (120V/24V 50VA)
MGV MILLIVOLT GAS VALVE
LGV 24 VOLT GAS VALVE
LGV-1 24 VOLT GAS VALVE
PS PRESSURE SWITCH
MR-PS MANUAL RESET PRESSURE SW.
SD STACK DAMPER
CONTROL TERMINAL
1 K RELAY COIL
1 K1 RELAY CONTACTS
1 K2 RELAY CONTACTS
LS LIMIT SWITCH
MS MANUAL SWITCH
CIR CIRCULATOR
ECO ENERGY CUT-OFF
LWCO LOW WATER CUT-OFF
EWF ELECTRIC WATER FEEDER
PG POWER GENERATOR
PSC PILOT SAFETY COIL
WIRE CONNECTION
NOT ALL COMPONENTS LISTED ARE
USED IN ALL CONTROL SYSTEMS
WIRING
LINE VOLTAGE BY FACTORY
LOW VOLTAGE BY FACTORY
LINE VOLTAGE BY INSTALLER
LOW VOLTAGE BY INSTALLER
COMPONENT CODE

15
WIRING DIAGRAMS AND COMPONENT CODING
24 VOLT GAS CONTROL WITH ELECTRONIC LOW WATER CUT-OFF
COMPONENT CODE
TH-1 THERMOSTAT (MILLIVOLT)
TH-2 THERMOSTAT (24 VOLT)
TH-3 THERMOSTAT (LINE VOLTAGE)
TR-1 TRANSFORMER (120V/24V
40VA)
TR-2 TRANSFORMER (120V/24V
50VA)
MGV MILLIVOLT GAS VALVE
LGV 24 VOLT GAS VALVE
LGV-1 24 VOLT GAS VALVE
PS PRESSURE SWITCH
MR-PS MANUAL RESET PRESSURE SW.
SD STACK DAMPER
CONTROL TERMINAL
1 K RELAY COIL
1 K1 RELAY CONTACTS
1 K2 RELAY CONTACTS
LS LIMIT SWITCH
MS MANUAL SWITCH
CIR CIRCULATOR
ECO ENERGY CUT-OFF
LWCO LOW WATER CUT-OFF
EWF ELECTRIC WATER FEEDER
PG POWER GENERATOR
PSC PILOT SAFETY COIL
WIRE CONNECTION
NOT ALL COMPONENTS LISTED
ARE USED IN ALL CONTROL
SYSTEMS
WIRING
LINE VOLTAGE BY FACTORY
LOW VOLTAGE BY FACTORY
LINE VOLTAGE BY INSTALLER
LOW VOLTAGE BY INSTALLER
NOTES:
1. Switches are shown in position
taken during the heating cycle.
2. If any of the original wiring
supplied with the boiler is
replaced, it must be replaced
with like wire, size, and type of
insulation or equivalent

16
LIGHTING INSTRUCTIONS
!
WARNING
If you do not follow these instructions
exactly, a fire or explosion may result
causing personal injury or loss of life.
Before any procedures are attempted on this
appliance, it is necessary to determine if the ignition
system is intermittent or continuous pilot system. If
you are uncertain, contact the manufacturer before
proceeding.
!
CAUTION
Before operating, make certain steam
boiler is full of water to water line
and system is vented of air. See the
operating lighting instructions.
LIGHTING PROCEDURE FOR BOILER WITH
INTERMITTENT PILOT SYSTEM.
FOR YOUR SAFETY READ BEFORE OPERATING.
• This appliance is equipped with an ignition system
which automatically lights the pilot. Do not try to
light the pilot by hand.
• 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.
!
CAUTION
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 gas supplier’s
instructions.
If you cannot reach your gas supplier, call
the fire department.
• Use only your hand to push in or turn gas control
knob. Never use tools. If the knob will not push
in 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.
• 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 gas control
which has been under water.
OPERATING INSTRUCTIONS FOR
INTERMITTENT PILOT SYSTEMS
1. STOP! Read all safety information starting on
this page.
2. Set thermostat to lowest setting.
3. Turn off all electric power to the appliance.
4. This appliance is equipped with an ignition device
which automatically lights the pilot. DO NOT try
to light the pilot by hand.
5. Remove access panel (if present)
6. Push in gas control knob slightly and turn
clockwise to “OFF.”
7. Wait five (5) minutes to clear out any gas. If you
then smell gas, STOP, Follow “B” in the safety
information “What To Do If You Smell Gas”. If you
don’t smell gas, go to the next step.
8. Turn gas control knob counterclockwise
to “ON.”
9. Replace control access panel (IF PRESENT).
10. Turn on all electric power to the appliance.
11. Set thermostat to desired setting.
12. If the appliance will not operate, follow the
instructions “To Turn Off Gas To Appliance” and
call a qualified service technician or your gas
supplier.
13. 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.

17
Figure 8 - Intermittent Pilot Gas Valve
LIGHTING INSTRUCTIONS
Figure 9 - Continuous Pilot Gas Valve
LIGHTING INSTRUCTIONS FOR BOILER
WITH CONTINUOUS PILOT SYSTEM.
1. Stop! Read the safety information starting on
page 17.
2. Set thermostat to lowest setting.
3. Turn off all electric power to the appliance.
4. Remove manifold cover and burner door, (figures
10 & 12).
LIGHTING PROCEDURE FOR BOILER WITH
CONTINUOUS PILOT SYSTEM.
FOR YOUR SAFETY READ BEFORE OPERATING.
• Read Warning on page 16.
• This appliance is equipped with a pilot which must
be lighted by hand. When lighting the pilot follow
these instructions exactly.
• 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. Follow Caution on page 16
for safety information for what do do if you smell
gas.
• Use only your hand to push in or turn gas control
knob or reset button. Never use tools. If knob or
reset button will not push in or knob will not turn
by hand, don’t try to repair it. Call a qualified
service technician. Force or attempted repair may
result in fire or explosion. See figure 9.
• Do not use this appliance if any part has been
underwater. 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.
5. Turn gas control knob clockwise
to “off” (See Note #1).
NOTE: Some gas control knobs cannot be turned
from “pilot” to “off” unless knob is pushed in
slightly. Do not force.
6. Wait (5) minutes to clear out any gas. If you
smell gas, stop! Follow safety information “What
to do if you smell gas,” located on page 16 of this
manual. If you don’t smell gas, go to the next
step.
7. Find pilot. Follow metal tube from gas control.
Depending on the model of the boiler, pilot is
mounted on the base or on one of the burner
tubes.
8. Turn gas control knob counterclockwise
to “pilot”.
9. Push in gas control knob, or reset button if so
equipped, all the way in and hold. Immediately
Light the pilot with a match. Continue to hold the
gas control knob or reset button for about one
(1) minute after the pilot is lit. Release knob or
button and it will pop back up. Pilot should remain
lit. If it goes out, repeat steps 5 through 9.
• If knob or button does not pop up when
released, stop and immediately call your
service technician or gas supplier.
• If the pilot will not stay lit after several tries,
turn the gas control knob clockwise
to “off” (see note*) and call a service
technician or gas supplier.
10. Replace burner door and manifold cover, (figures
10 & 12).
11. Turn gas control knob counterclockwise
to “on”.

18
NORMAL SEQUENCE OF OPERATION
On a call for heat:
1. The thermostat will actuate completing the circuit
between T and T.
2. The damper will then open thus closing the end
switch completing the circuit, and ignition will
begin.
3. In the event that the boiler steam pressure
exceeds the pressure control setting, the pressure
control will interrupt the circuit to the boiler
ignition system. The power will remain off until
the steam pressure drops below the pressure
control setting.
4. In the event a low water condition occurs, an
automatic low water cut-off device will interrupt
the circuit to the ignition system until the low
water condition is satisfied, (i.e., manually restore
the water or utilize an electric water feeding
device which will automatically restore boiler
water to its normal operating level).
Figure 10 - Roll-Out Safety Switch
TO TURN OFF GAS TO APPLIANCE
1. Set thermostat to lowest setting.
2. Turn off all electric power to appliance if service is
to be performed.
3. Remove access panel (if present).
4. Turn gas control knob clockwise to “off”.
NOTE: Some gas control knobs cannot be turned
from “pilot” to “off” unless knob is pushed in
slightly. Do not force. Do not force.
LIGHTING INSTRUCTIONS
5. In the event the flow of combustion products
through the boiler venting system becomes
blocked, a blocked vent safety switch will shut the
main burner gas off (See figure 13 below).
6. In the event the flow of combustion products
through the flue-ways becomes blocked a flame
rollout switch will shut the main burner gas off.
See figure 10.

19
CONNECTING SUPPLY AND RETURN PIPING, WATER CHILLED MEDIUM
1. Boiler, when used in connection with a refrig-
eration system, must be installed so the chilled
medium is piped in parallel with the boiler with
appropriate valves to prevent the chilled medium
from entering the boiler. See figure 11.
2. When the boiler is connected to heating coils
located in air handling units where they may be
exposed to refrigerated air circulation, the boiler
piping system MUST be supplied with flow con-
trol valves or other automatic means to prevent
gravity circulation of the boiler water during the
cooling cycle.
3. A hot water boiler installed above radiation level,
or as required by Authority having jurisdiction,
must be provided with a low water cutoff device
either as a part of the boiler or at the time of
boiler installation.
4. Suggested piping for steam heating system can
be seen in figure 1 on page 6. Actual piping may
vary based on system design and local conditions.
Figure 11 - Boiler with Refrigeration System
* Reduced pressure back-flow preventer must be present under provisions required by the Environmental
Protection Agency, (EPA).

20
SAFETY RELIEF
LOW WATER
CUT OFF
DRAFT HOOD
PRESSURE CONTROL
GAUGE
BURNER ACCESS DOOR
MAIN BURNERS
MAIN GAS VALVE
28" W.L.
NOTE: MANIFOLD COVER NOT SHOWN
GENERAL INSTRUCTIONS
• Before seasonal start up it is advisable to have
a competent service agency check the boiler for
soot and scale in the flues, clean the burners,
and check the gas input rate to maintain high
operating efficiency.
• On steam boilers make certain the boiler is filled
to the water line as indicated in figure 12. The
gauge cocks should be normally open. To remove
dirt from the gauge glass the petcock may be
opened to flush out the glass.
!
WARNING
Discharge will be boiling hot water.
• The radiator valves on a one-pipe steam system
must be either wide open or tightly shut. Do not
attempt to regulate room temperature by partially
closing the radiator valve.
• Air vents on steam radiators and the supply main
release air from the system. If radiators do not
heat satisfactorily, make sure the air vents are
clean and operational.
• The lever of the safety valve, shown in figure 12,
on the boiler should be operated periodically to
make sure that it is functioning properly.
!
WARNING
Discharge will be boiling hot water and
steam.
• The safety valve should open before the steam
pressure exceeds the 15 lb. reading on the gauge.
If this pressure is exceeded and the safety valve
does not open, it must be replaced. If the safety
valve leaks steam when the boiler is operating
at normal pressures, it should be immediately
replaced. Corrosion can build up rapidly at the
valve seat and prevent its functioning as a safety
device.
• During the heating season the drain valve, on the
bottom rear of the boiler, should be opened once
a month to flush out the boiler so the device will
be free to function properly. Use a pail to catch
the discharge.
!
WARNING
Discharge will be boiling hot water.
• If the water in a steam boiler appears to be
dirty or oily, or the water level in the gauge
glass fluctuates considerably, the boiler should
be cleaned and skimmed (See page 21 for
instructions). A competent service person will use
approved cleaning compounds and properly clean
and flush out the boiler. He/she should also clean
or replace air vents and traps, clean flue passages
and check for proper operation of all controls and
safety devices.
• Venting system should be inspected at the start
of each heating season. Check the vent pipe from
the boiler to the chimney for signs of deterioration
by rust or sagging joints. Repair if necessary.
Remove the vent pipe at the base of the chimney
or flue and, using a mirror, check for obstruction.
• Boiler flue gas passageways may be inspected
by a light and mirror. Remove the burner access
door, (figure 12). Place a trouble lamp in the flue
collector through the draft-hood relief opening.
With the mirror positioned above the burners, the
flue gas passageways can be checked for soot or
scale.
Figure 12 - Burner Access Door