Camus Hydronics MICOFLAME 2 Series Setup guide

99-0053
Rev. 01
INSTALLATION OPERATION
AND SERVICE MANUAL
MICOFLAME SERIES 2
GAS FIRED COMMERCIAL COPPER TUBE BOILERS
FOR HYDRONIC HEATING
Models; MFH800, 1000, 1200, 1400, 1600, 1800, 2000
HOT WATER SUPPLY
Models; MFW800, 1000, 1200, 1400, 1600, 1800, 2000
WARNING: If the information in these instructions is not
followed exactly, a fire or explosion may result causing
property damage, personal injury or death
•Do not store or use gasoline or other flammable
vapours and liquids in the vicinity of this or any other
appliance.
•WHAT TO DO IF YOU SMELL GAS
oDo not try to light any appliance,
oDo not touch any electrical switch; do not use any
phone in your building,
oImmediately call your gas supplier from a
neighbour’s phone. Follow the gas supplier’s
instructions,
oIf you cannot reach your gas supplier, call the fire
department.
•Qualified installer, service agency or the gas supplier
must perform installation and service.
To the installer: After installation, these instructions must be
given to the end user or left on or near the heater.
To the End User: This booklet contains important information
about this heater. Retain for future reference.
CAMUS HYDRONICS LTD.
6226 Netherhart Road, Mississauga, Ontario, L5T 1B7

Table of Contents
INTRODUCTION..................................................................................................................................1
1. GENERAL INSTRUCTIONS............................................................................................................1
2. BOILER LOCATION ........................................................................................................................2
3. PROVIDE AIR FOR COMBUSTION AND VENTILATION .........................................................3
4. ELECTRICAL WIRING....................................................................................................................3
5. STAGING OPERATION...................................................................................................................4
6. GAS SUPPLY AND PIPING.............................................................................................................5
7. VENTING...........................................................................................................................................6
7.1 OUTDOOR VENTING..............................................................................................................8
7.2 SIDEWALL VENTING............................................................................................................9
7.3 OUTDOOR AIR KIT ................................................................................................................9
7.4 FILTER KIT............................................................................................................................10
7.5 STANDARD VENTING.........................................................................................................10
7.6 VENTING FOR CONDENSING APPLICATION.................................................................10
8. RELIEF VALVE ..............................................................................................................................10
9. FREEZE PROTECTION..................................................................................................................10
10. WARNING REGARDING CHILLED WATER SYSTEMS........................................................11
11. PIPING OF SYSTEM TO BOILER (FIG.4)..................................................................................11
12. PLACING BOILER IN OPERATION...........................................................................................13
13. IGNITION SYSTEM SAFETY SHUT-OFF DEVICE..................................................................13
14. LOW WATER TEMPERATURE SYSTEMS...............................................................................13
15. INSTANTANEOUS WATER HEATER.......................................................................................14
16. PILOT AND MAIN BURNER FLAMES......................................................................................15
16.1. MAIN BURNER ..................................................................................................................15
16.2. PILOT BURNER..................................................................................................................17
17. OPERATION AND SERVICE ......................................................................................................18
18. LIGHTING INSTRUCTIONS .......................................................................................................19
19. TROUBLE SHOOTING GUIDE...................................................................................................20
20. TYPICAL GAS TRAIN .................................................................................................................21
21. ELECTRICAL DIAGRAMS..........................................................................................................21
22. EXPLODED VIEW......................................................................................................................24
23. MICO FLAME REPLACEMENT PARTS LIST ..........................................................................25
WARRANTY ........................................................................................................................................... 26

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INTRODUCTION
Camus Hydronics proudly introduces its MicoFlame series 2 of commercial water heaters /
hydronic boilers. These gas-burning appliances are thoughtfully designed for easy operation
and maintenance. We are confident that you will come to appreciate the benefits of our product.
1. GENERAL INSTRUCTIONS
The installation of this heater must conform to the requirements of the authority having
jurisdiction or, in the absence of such requirements, to the National Fuel Gas Code, ANSI
Z223.1 or CAN/CGA B149 Installation Codes. All electrical wiring must be done 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 or the Canadian Electrical Code
Part I , CSA C22.1 Electrical Code .
Vent installations must be in accordance with Part 7, Venting of Equipment, of the National Fuel
Gas Code, ANSI Z223.1, or Section 7, Venting Systems and Air Supply for Appliances, of the
CAN. CGA B149, Installation Codes and applicable provisions of the local building codes.
When required by the authority having jurisdiction, the installation must conform to the Standard
for Controls and Safety Devices for Automatically Fired Boilers, ANSI/ASME CSD-1.
The qualified installer shall instruct the end user in the safe and correct operation of this
appliance and shall ensure that the heater is in safe working order prior to leaving the job site.
WARRANTY:
Factory warranty shall apply only when the boiler is installed in accordance with
local plumbing and building codes, ordinances and regulations, the printed
instructions provided with it and good industry practices.
Excessive water hardness causing a lime build-up in the copper coils or tubes is
not a fault of the boiler and is not covered by warranty. Consult the factory for
recommendations for use in hard water areas.
Using or storing corrosive chemicals in the vicinity of this boiler can rapidly
attack the copper tubes and coils and voids warranty.
The primary heat exchanger of this boiler is intended to operate under non-
condensing conditions. Inlet temperatures must be maintained at 110 °F or
higher. Warranty is void if the primary heat exchanger is allowed to operate in
condensing mode.
Damage caused by freezing or dry firing voids warranty.
This boiler is not to be used for temporary heating of buildings under
construction.

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2. BOILER LOCATION
Install this boiler in a clean, dry location with adequate air supply and close to a good vent
connection.
Do not locate this boiler in an area where it will be subject to freezing.
The boiler must not be installed on carpeting and should be located close to a floor drain in an
area where leakage from the boiler or connections will not result in damage to the adjacent area
or to lower floors in the structure.
If necessary a suitable drain pan should be installed under the boiler.
If the boiler is installed above the level of the building’s radiation system, a low water cutoff
device must be installed in the boiler outlet at the time of installation. Some local codes require
the installation of a low water cutoff on all systems.
Locate the boiler so as to provide adequate clearance for inspection and service all around the
unit. It is recommended that 24” be provided for the top and sides and 48” for the front.
This boiler is suitable for alcove installation with minimum clearances to combustibles as
follows:
TOP: 12”
SIDES: 12”
REAR: 12”
VENT: 6”
For boiler’s dimensions see Figure 1 and table 1
Side View (Left)
Condensing Option Front View Side View (Right) Non-Condensing Option Rear View Non-Condensing Option
Figure 1

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B' Dia. Venting E' Dia.
Model W'
Water
Connection
Gas
Connection
Outdoor
Condensing
or Sidewall
Standard
Air Inlet
MF800 45 3/4 2 1/2 1 8 8 10 8
MF1000 52 3/4 2 1/2 1 1/4 8 8 10 8
MF1200 62 2 1/2 1 1/4 10 10 12 10
MF1400 71 1/4 2 1/2 1 1/4 10 10 12 10
MF1600 80 3/4 2 1/2 1 1/2 12 12 14 12
MF1800 89 3/4 2 1/2 1 1/2 12 12 14 12
MF2000 99 2 1/2 1 1/2 12 12 14 12
Table 1
3. PROVIDE AIR FOR COMBUSTION AND VENTILATION
Provisions for combustion and ventilation air must be in accordance with:
•Section 5.3. Air for combustion and Ventilation, of the National Fuel Gas Code, ANSI
Z223.1, or;
•Sections 7.2, 7.3 or 7.4 of CAN/CGA B149 Installation Codes, and;
•Applicable provisions of the local building codes.
The operation of exhaust fans, compressors, air handling units etc. can rob air from the room,
creating a negative pressure condition leading to reversal of the natural draft action of the
venting system. Under these circumstances an engineered air supply is necessary.
If the heater is to be installed near a corrosive or potentially corrosive air supply, the heater
must be isolated from it and outside air should be supplied as per code.
Potentially corrosive atmospheres will result from exposure to permanent wave solution,
chlorinated waxes and cleaners, chlorine, water softening chemicals, carbon tetrachloride,
halogen based refrigerants, Freon cleaning solvents, hydrochloric acid, cements and glues,
masonry washing materials, antistatic fabric softeners, dry cleaning solvents, degreasing liquids,
printing inks, paint removers, etc.
4. ELECTRICAL WIRING
All electrical wiring to the boiler 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 or the Canadian Electrical Code Part I, CSA C22.1,
Electrical Code.

4
Provide disconnecting means of sufficient rating within sight of the boiler. These heaters require
an 115V 60hz supply. Depending on the pump used, a 15-amp breaker is usually sufficient.
Electrical connections must be made so that the circulator will operate before the gas valve can
open. At no time may the control system allow the burner to fire without water flowing in the
system.
Use minimum 18-gauge conductor for 24-volt field wiring to boiler. Splicing of wires is not
recommended.
Use sealed tight conduit suitable for outdoor use for outdoor installations.
Use terminal strip provided inside control panel for low water cut-off and remote controller
Refer to wiring diagram provided with boiler.
5. STAGING OPERATION
Staging of the MicoFlame series 2 is dependent on the number of burners supplied. Models
800 and 1000 are supplied with a single burner and are available as on/off and two stages.
Models 1200 through 2000 are supplied with two burners and are available as on/off, 2-stage, 3-
stage and 4-stage.
Each burner is supplied with a dedicated airflow proving signal and separate proved pilot
ignition system. All fans must be running in order for the appliance to proceed to trial for ignition.
MicoFlame series 2 is supplied with more than one burner may use burners that are not of
identical size in order to accommodate fans within the space allocated. In case where burners
are not identical, the right side burner will be the one with the higher input.
Each MicoFlame series 2 is supplied with the appropriate wiring diagram showing the actual
staging sequence provided as well as any special controls or options requested.
When converting multiple MicoFlame series 2 appliances to an external sequencing control it is
absolutely necessary to program the sequencer properly by entering the number of stages
provided on the appliance. In this way the sequencer will lead/lag or rotate the boilers properly.
A full diagnostics panel is provided on the MicoFlame series 2. On a call for heat, status lights
will light up if the particular safety is working properly. Once all safeties have been proved, the
boiler will proceed to trial for ignition and will then sequentially bring on the burner stages (and
the corresponding lights). If the safety proving sequence does not proceed to completion, the
first safety light to remain off will indicate the cause of the problem. All other lights below the
problem indicator light will also remain off.

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Burner staging is arranged to allow a minimum firing rate of no less than 50% in order to
minimize possibility of condensation in the venting. Staging of burners for models 1200 through
2000 is as follows:
Two
Stage Left Burner Right Burner
Stage 1 Off Full-Fire
Stage 2 Full Fire Full-Fire
Three
Stage * Left Burner Right Burner
Stage 1 Off Lo-Fire
Stage 2 Off Hi-Fire
Stage 3 Full-Fire Hi-Fire
*Recommended for Models 1400 and 1600
Four
Stage Left Burner Right Burner
Stage 1 Off Lo-Fire
Stage 2 Off Hi Fire
Stage 3 Lo-Fire Hi-Fire
Stage 4 Hi-Fire Hi-Fire
6. GAS SUPPLY AND PIPING
This boiler is intended to operate at inlet gas pressures not exceeding ½ PSI (14“ W.C.). If
higher pressures are present, consult the gas company for correction.
When pressure testing the gas supply piping at pressures above ½ PSI, the boiler and its
individual gas shut-off valve must be disconnected from the supply piping.
Provide a trap (drip leg) as close to the heater as possible.
Install a good joint union and manual shut-off valve in the gas line near the heater to allow easy
removal of the gas control assembly.
Provide gas pressures at inlet to boiler manifold as follows:
PROPANE NATURAL GAS
Minimum (inches W.C.) 11 4
Maximum (inches W.C.) 11 7
The gas supply line must be of adequate size to prevent undue pressure drop and must never
be smaller than the size of the connection on the heater. Sizing based on Table 2 is
recommended.

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Before operating the boiler, the complete gas train and all connections must be tested using
soap solution.
DISTANCE FROM NATURAL GAS METER OR PROPANE SECOND STAGE REGULATOR
0-100 FT 100-200 FT. 200-300 FT.Input
Btu/Hr NAT. L.P. NAT. L.P. NAT. L.P.
800,000 2” 1 ½“ 2 ½“ 2“ 2 ½“ 2“
1,000,000 2” 1 ½“ 2 ½“ 2“ 2 ½“ 2“
1,200,000 2 ½“ 2“ 2 ½“ 2“ 3” 2 ½“
1,400,000 2 ½“ 2“ 2 ½“ 2“ 3” 2 ½“
1,600,000 2 ½“ 2“ 3” 2 ½“ 3” 2 ½“
1,800,000 2 ½“ 2“ 3” 2 ½“ 3” 2 ½“
2,000,000 2 ½“ 2” 3” 2 ½“ 3” 2 ½“
Table 2
7. VENTING
Boilers for outdoor installation are intended to vent using a listed vent cap.
For indoor installations venting must be in accordance with Part 7, Venting of Equipment, of the
National Fuel Gas Code, ANSI Z223.1, or Section 7, Venting of Equipment and Air Supply for
Appliances, of the CAN/CGA B149, Installation Codes, and applicable provisions of the local
building codes.
Vent connectors serving appliances vented by natural draft shall not be connected into any
portion of mechanical draft systems operating under positive pressure.
Horizontal runs of vent pipe shall be securely supported (approximately every 4 feet) to prevent
sagging and maintain a minimum upward slope of ¼” per foot from the boiler to the vent
terminal.
When an existing boiler is removed from a common venting system, the common venting
system is likely to be too large for proper venting of the appliances remaining connected to it .At
the time of removal of an existing boiler, the following steps must 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.
a) Seal any unused openings in the common venting system.
b) Visually inspect the venting system for proper size and horizontal pitch and determine
that there is no blockage, restriction, leakage, corrosion or other deficiency, which could
cause an unsafe condition.
c) 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 of the building. Turn on the clothes dryers and any appliances
not connected to the common venting system. Turn on any exhaust fans, such as range

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hoods and bathroom exhausts, so they will operate at maximum speed, do not operate a
summer exhaust fan. Close fireplace dampers.
d) Place in operation the appliance being inspected. Follow the lighting instructions. Adjust
thermostat so that appliance operates continuously.
e) 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.
f) 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.
g) Any improper operation of the common venting system must be corrected so that the
installation conforms to the National Fuel Gas Code, ANSI Z223.1 or CAN/CGA B149,
Installation Codes. When resizing any portion of the common venting system, the
common venting system should be resized to approach the minimum size as determined
using the appropriate tables in Part 11 of the National Fuel Gas Code, ANSI Z223, 1 or
CAN/CGA B149, Installation Codes.
Heat exchanger surfaces and vent piping should be checked every six months for deterioration
and carbon deposits. Remove all soot or other obstructions from the chimney and flue, which
might impede draft action. Replace any damaged or deteriorated parts of the venting system.
A qualified service technician should follow this procedure when inspecting and cleaning the
heat exchanger and vent pipe.
1. Turn off electrical power and close main manual gas shut-off and allow boiler to cool
down
2. Remove the vent pipe running to chimney. Remove top outer panel and flue collector
access panel. Check heat exchanger, vent and chimney for obstruction and clean as
necessary.
3. Remove burner from boiler and vacuum the burner, and the heat exchanger. If heat
exchanger is excessively dirty it may be necessary to remove it from the boiler and wash
it down with proper detergent cleaner. Be aware that the combustion chamber base is
insulated with ¼” thick ceramic paper. If this material is damaged or displaced it must be
replaced before starting up the boiler.
4. Reinstall parts removed in steps 2 and 3. Be sure that vent pipe has proper pitch and is
properly sealed. Repair or replace any gaskets, which may have been damaged in steps
2 and 3.
5. CAUTION: When replacing the burner be careful to fully engage the back of the burner
box into the retaining slot in the combustion chamber base. Failure to properly locate the
burner will result in erratic flame operation with the possibility of delayed ignition on light
off.
6. Restore electrical power and gas supply to boiler.
7. Place boiler in operation using lighting instructions provided.

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8. While the boiler is operating, check for flue gas leaks and proper vent operation. Seal
any flue gas leaks using appropriate gasket or sealing material. Carefully examine the
flue collector access panel and heat exchanger ends.
The MicoFlame series 2 is category 1, 85% efficient when supplied as a non-condensing
appliance. When supplied with the optional condensing cartridge, the MicoFlame series 2 is
95% efficient and is considered to be a category II or IV appliance. Three venting options are
available for this boiler in both condensing and non-condensing configurations. See Figure 2 for
details. (Please refer to Table 1 for vent dimensions)
Figure 2
7.1 OUTDOOR VENTING
When fitted with the factory supplied rain shield and UL approved vent cap, the MicoFlame
series 2 is self-venting. The following applies to outdoor installations:
1. Use only factory supplied rain shields.
2. Periodically check to ensure that air intake and vent cap are not obstructed.
3. Locate boiler at least 3 feet away from any overhang.

9
4. Locate boiler at least ten feet from building air intake.
5. Avoid installation in areas where runoff from adjacent building can spill onto boiler.
7.2 SIDEWALL VENTING
When fitted with the factory supplied vent terminal, the MicoFlame series 2 can vent up to 60
equivalent feet. Elbows can range from 8 to 15 feet in equivalent length depending on centreline
radius. See Table 1 for vent sizes.
Boilers may be installed with either a horizontal sidewall vent or vertical roof top terminal.
Terminals differ with each application. Horizontal lengths over 5 feet must be installed using
corrosion resistant stainless steel. Use single wall vent and seal all joints or use pressure rated
double wall vent.
Refer to local codes for proper installation and location of vent terminals.
When using sidewall vent, all vent connector seams and joints must be sealed with pressure
sensitive aluminium tape or silicone sealant as specified by the vent manufacturer. Aluminium
tape must meet the provisions of SMACNA AFTS-100-73 Standard.
When venting through unheated spaces with single wall vent, insulation should be wrapped
around the vent pipe to prevent flue gas condensation inside the vent.
Periodically check to ensure that the vent terminal is unobstructed.
7.3 OUTDOOR AIR KIT
When fitted with the factory supplied air inlet ring and air intake terminal, the MicoFlame series 2
can draw outdoor air over an equivalent length of 60 feet. See Table 1 for vent sizes.
Boilers may be installed with either a horizontal sidewall vent or vertical roof top terminal.
Terminals differ with each application.
The following applies to outdoor air installations:
1. Use only factory supplied air intake terminal.
2. Periodically check to ensure that air intake is not obstructed.
3. Refer to local codes for proper installation and location of vent terminals. Vertical vent
terminal must be at least 3 feet above the highest point where it is located above the roof
of a building and at least two feet higher than any part of the building within a horizontal
distance of ten feet
4. Locate the air intake five feet away from the vent discharge. For sidewall venting locate
the air intake below the vent outlet if possible.

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7.4 FILTER KIT
A louvered rear panel is the standard air inlet configuration for the MicoFlame series 2. A filter
kit is available. The filter is washable and accounts for an additional pressure loss of less than
0.05” W.C. Highly recommended for dusty environments.
The filter kit can also be provided when using the outdoor air kit.
7.5 STANDARD VENTING
The MicoFlame series 2 is a category 1 appliance and is approved for venting into a common
standard chimney. If chimney height is much greater than 30 feet or if drafts are excessive, it
may be preferable to provide a single acting barometric damper directly above the vent collar.
This damper will ensure smooth light off and minimize standby loss through the boiler. Be sure
to position the damper at least 6 “ away from the wall of the vent connector.
7.6 VENTING FOR CONDENSING APPLICATION
When supplied with the optional condensing cartridge, the MicoFlame series 2 is 95% efficient
(category II or IV appliance) which requires the use of special venting system. Refer to
installation instruction No. 93-0152-1. Only venting components listed by a nationally recognized
testing agency may be used.
8. RELIEF VALVE
A pressure relief valve is supplied as standard equipment. The relief valve protects against
damage that could be caused by malfunctioning controls or excessive water pressure. If a relief
valve is not used, warranty is void.
The relief valve is to be located as near as practical to the outlet of the boiler. To maintain
capacity do not reduce the inlet connection of the relief valve. Connect the outlet of the relief
valve to a suitable drain. The drainpipe must point down from the valve and must not be smaller
than the outlet of the valve. The end of the drain line should not be concealed or threaded and
should be protected against freezing. No valve of any kind should be installed between the relief
valve and the unit or in the drain line. Extensive runs, traps or bends could reduce the capacity
of the valve. This valve should be checked for proper operation at least once a year by a
qualified service technician.
9. FREEZE PROTECTION
Boiler installations are not recommended in areas where the danger of freezing exists unless
precautions are taken. Maintaining a mixture of 50% water and 50% propylene glycol is the
preferred method of freeze protection in hydronic systems. This mixture will protect the boiler to
approximately -35 °F (-37 °C). To maintain the same temperature rise across the boiler
increase the G.P.M. flow by 15% and the head loss by 20%.
A snow screen should be installed to prevent snow and ice accumulation around the boiler.
Regular inspections should be made to ensure that air intake and vent are free of snow and ice.

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10. WARNING REGARDING CHILLED WATER SYSTEMS
When a boiler is connected to an air conditioning system where the same water is used for
heating and cooling, the chiller must be piped in parallel with the boiler. Appropriate flow control
valves; manual or motorized must be provided to prevent the chilled water from entering the
boiler. (See figure 3)
Figure 3
When a boiler is connected to heating coils located in air handling units (where they may be
exposed to refrigerated air circulation), the boiler piping system shall be equipped with a flow
control valve or other automatic means to prevent gravity circulation of chilled water through the
boiler. Chilled water in the boiler will create condensate on the boiler tubes, which will collect in
the combustion chamber causing corrosion.
11. PIPING OF SYSTEM TO BOILER (FIG.4)
Check all applicable local heating, plumbing and building safety codes before proceeding.
Be sure to provide unions and gate valves at inlet and outlet to boiler so that it can be easily
isolated for service.
This boiler is of a low mass design, which provides for instant heat transfer. Special attention to
water flow rates will ensure that temperature rise does not exceed 35 °F (19.4 °C). The
following table 3 is provided as a guide.
For application in areas known to have hard water conditions, contact factory for
recommendations.

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Head Loss and Flow Vs Temperature Rise
20 °F 30 °F 35 °F
Model
USGPM ∆P ft. USGPM ∆P ft. USGPM ∆P ft.
800 66.6 2.8 44.4 1.1 38.0 0.8
1000 83.3 4.9 55.5 2.0 47.6 1.5
1200 100.0 6.9 66.7 3.1 57.1 2.4
1400 * * 77.8 4.3 66.7 3.4
1600 * * 88.9 5.4 76.2 4.0
1800 * * 100.0 6.9 85.7 5.1
2000 * * * * 95.2 6.2
* Contact factory for recommendations
Table 3
Figure 4
If the boiler is installed above radiation level, it must be provided with a low water cutoff device
at the time of boiler installation. (Available from factory)
A pressure relief valve is supplied with each MicoFlame series 2 boiler. The relief valve must be
piped to the floor in a manner acceptable to the enforcing authority.
To eliminate trapped air, install venting devices at high points in the system as well as in the
piping on the suction of the pump and in the piping on the discharge of the boiler.
Suitable pipe hangers must support the weight of all water and gas piping or floor stands.

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Do not allow the boiler to run with inlet water temperature below 110 °F.
The boiler must be installed so that the gas ignition system components are protected from
water (dripping, spraying, rain, etc.) During appliance operation and service (circulator
replacement, control replacement, etc.)
12. PLACING BOILER IN OPERATION
The MicoFlame series 2 boiler should be installed and started up by qualified personnel.
With the boiler off, open makeup water valve and allow system to fill slowly. Adjust the pressure
regulator to provide at least 15 PSIG at the highest point in the system.
With all air vents open, run system circulating pump for a minimum of 30 minutes with the boiler
off.
Open all strainers in the circulating system and check for debris.
Check liquid level in expansion tank. With system full of water at 15 PSIG, the level of water in
the expansion tank should not exceed ¼of the total volume with the balance filled with air.
Start up boiler following instructions provided. Operate entire system including pumps and
radiation for at least 1 hour.
Check water level in expansion tank. If level exceeds ½ of tank volume, air is still trapped in
system. Shut down boiler and continue to run pumps.
Within 3 days of start up, recheck all air vents and expansion tank as described above.
13. IGNITION SYSTEM SAFETY SHUT-OFF DEVICE
After initial fill while the main burner is firing, shut off gas to the pilot and clock the time taken for
the main gas valve to shut down. If the safety control is functioning properly, power to the gas
valve will be shut off within 4 seconds of the pilot gas being shut off. If shut down takes longer,
ignition control or gas valve may be defective.
14. LOW WATER TEMPERATURE SYSTEMS
In applications where the heating system requires supply water temperatures below 110 °F, a
bypass line must be installed upstream of the boiler pump so that outlet water can be re-
circulated to raise the inlet temp to a minimum of 110 °F. Balancing valves, preferably globe
valves are used to adjust flow. (See figure 5)

14
Figure 5
•Adjustment procedure.
a. Fully open bypass and outlet valves.
b. With boiler running, read inlet temperature after 15 minutes.
c. If the inlet temperature is less than 110 °F slowly close outlet valve until the inlet
temperature climbs to 110 °F
d. If the inlet temperature is greater than 110 °F but not greater than 140 °F no
further adjustment is required.
e. Check the inlet temperature after 5 minutes and make final adjustments.
15. INSTANTANEOUS WATER HEATER
An instantaneous water heater is designed to deliver hot water without the use of a storage
tank. It is suitable for applications with variable load such as restaurants, condominiums,
apartments and motels. (See figure 6) Call factory for recommendations.

15
Figure 6
16. PILOT AND MAIN BURNER FLAMES
To maintain safe operation and the greatest efficiency of the boiler, check the main burner and
pilot burner every six months for proper flame characteristics.
16.1. MAIN BURNER
The main burner, figure 7 should display the following characteristics;
•Acceptable CO and CO2levels for complete combustion.
•Light off smoothly.
•Reasonably quiet while running.
•Stable flame with minimum of lifting.
•Blue flame with natural gas, yellow tips with propane gas

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Figure 7
If burner characteristics do not match the above, check for proper air box pressure. Also look
for accumulation of lint and other foreign material at fan air inlets. Typical air box settings are as
follows (settings in brackets denotes condensing application):
AIR BOX “ W.C. (with burner firing) FLUE SWITCH RECYCLE POINT “ W.C
MODEL Left Burner Right Burner Left Burner Right Burner
800 - 1.4 (1.7) - 1.0 (1.4)
1000 - 1.9 (2.2) - 1.5 (1.9)
1200 0.9 (1.1) 0.9 (1.1) 0.8 (0.9) 0.7 (0.9)
1400 0.9 (1.1) 1.4 (1.7) 0.7 (0.9) 1.1 (1.3)
1600 0.9 (1.1) 1.9 (2.2) 0.7 (0.9) 1.5 (1.8)
1800 1.6 (1.9) 1.6 (1.9) 1.2 (1.6) 1.2 (1.6)
2000 1.9 (2.2) 1.9 (2.2) 1.5 (1.9) 1.5 (1.9)
Depending on field conditions air box pressures will have to be adjusted accordingly. Always set
the appliance for a CO2level in the range of 7.5% to 8.5 %.
A qualified service technician should follow this procedure when burner needs cleaning.
1. Shut off power and close main manual gas valve.
•Allow burner to cool before removal.
2. Remove access cover screws.
•Disconnect pilot gas at bulkhead fitting.
•Disconnect ground wire and ignition wire.
•Remove two wing nuts holding down burner.
•Gently pull down and forward to disengage burner.
•Remove burner being careful to not damage the igniter or ground electrodes.
3. Thoroughly clean burner. Check all ports and air channels for blockage.

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4. Reinstall the burner being careful to fully engage the back of the burner box into the
retaining slot in the combustion chamber base. Failure to properly locate the burner will
result in erratic flame operation with the possibility of delayed ignition on light off.
5. Restore electrical power and gas supply to the boiler.
•Following the lighting instructions put the boiler back into operation
•Check for gas leaks and proper boiler and vent operation.
16.2. PILOT BURNER
Turn the pilot firing valve to off position and allow the boiler to try for ignition. Observe the spark
making sure that it is strong and continuous.
If the spark is not acceptable the igniter will have to be adjusted. This can be readily
accomplished after removing the main burner.
The spark gap should be 1/8” to 3/16”. Make sure that the electrode does not appear
overheated or fouled with carbon. It may be necessary to clean the ignition electrode using steel
wool. Once the pilot appears to be properly set, reinstall it into the appliance making sure to
properly tighten the pilot line connection.
If the pilot is removed from the main burner in the course of servicing the boiler, it is important to
replace all gaskets and seals. These seals are intended to prevent the bypass of air around the
pilot.
Figure 8
Once the spark is satisfactory, open the pilot gas and allow the pilot burner to light. Once air has
been purged from the pilot line, the pilot flame should appear almost instantly at the initiation of
spark. Cycle the pilot several times to confirm reliability. A properly set pilot will appear blue and
will engulf the igniter and ground electrode. (See figure 8)
Open the firing valve and allow the main burner to light. The pilot must not extinguish. After
running for 15 minutes, cycle the boiler to ensure that the pilot remains stable.

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17. OPERATION AND SERVICE
OPERATION:
Before operating the boiler, the entire system must be filled with water, purged of air and
checked for leaks. Do not use Stop leak or other boiler compounds. The gas piping must also
be leak tested.
Any safety devices including low water cutoff, flow switch and high limit used in with this boiler
must receive periodic inspection (every six months) to assure proper operation. A low water
cutoff of the float type should be flushed every six months. All relief valves should be inspected
and manually operated every six months.
For your safety follow the lighting and operating instructions below and on the boiler.
To turn on main burner, slowly open firing valve after pilot is established.
Set primary system controller to desired temperature.
To turn off boiler close main manual gas valve, close pilot manual valve and turn off electric
power to system.
SERVICE:
Disconnect main power and turn off gas supply before servicing unit.
To remove and clean the burner, follow the detailed procedure in section 15 of this manual
After the first season of operation inspect the heat exchanger and venting . Follow the detailed
instructions in section 6 of this manual.
CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can
cause improper and dangerous operation. Verify proper operation after servicing.
Any audible sounds in the equipment, like pinging, crackling or hissing are indications of scaling
or lack of sufficient water flow. Under these conditions the boiler must be shut down immediately
and the heat exchanger checked for damage. If the exchanger is damaged from scaling, it is not
covered by warranty.
Should your equipment be subjected to fire, flood or some other unusual condition, turn off all
gas and electrical supply. if you are unable to turn off the gas , call your gas company or gas
supplier at once. Do not put the unit back in operation until it has been checked by a qualified
agency to ensure that all controls are functioning properly.
Units that are not operated for a period of 60 days or more are considered seasonal operations.
It is recommended that before returning one of these units to service, the proper operation of all
controls be checked by a qualified service technician.