Camus Hydronics DynaMax DMH081 Setup guide

6226 Netherhart Road, Mississauga, Ontario, L5T 1B7
99-0056
Rev. 3.2
INSTALLATION OPERATION
AND SERVICE MANUAL
GAS FIRED WALL HUNG & FLOOR MOUNT RESIDENTIAL
COMMERCIAL STAINLESS STEEL BOILERS
DynaMax SERIES
HYDRONIC HEATING
Models; DMH081, 101, 151, 201, 251,
211, 261, 291, 391, 501, 601, 701, 801
HOT WATER SUPPLY
Models; DMW082 ,102, 152, 202, 252,
212, 262, 292, 392, 502, 602, 702, 802
COMBINATION HEATING/HOT WATER SUPPLY
Models; DMC083, 103, 153, 203, 253,
213, 263, 293, 393, 503, 603, 703, 803
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
I
nstaller:
After installation, these instructions
must be given to the end user or left on or near the
appliance.
To the End User: This booklet contains important
information about this appliance. Retain for future
reference.
CAMUS HYDRONICS LTD.

Contents
PART 1 GENERAL INFORMATION ............................................................................................................................................ 1
1.1 INTRODUCTION............................................................................................................................................................ 1
1.2 SPECIAL INSTRUCTIONS TO OWNER ............................................................................................................................ 1
1.3 CHECKING EQUIPMENT ............................................................................................................................................... 1
1.4 DISPLAY UNIT ............................................................................................................................................................... 1
1.5 SEQUENCE OF OPERATION .......................................................................................................................................... 1
1.5.1 Heat T ansfe P ocess ................................................................................................................................................. 1
1.5.2 End of Sequence.......................................................................................................................................................... 2
1.6 INSTALLATION CODES .................................................................................................................................................. 2
1.7 WARRANTY .................................................................................................................................................................. 2
1.8 REMOVAL OF EXISTING APPLIANCE ............................................................................................................................. 2
1.9 BOILER/FURNACE ROOM OPERATING CONDITION ..................................................................................................... 3
1.10 LOCATION OF UNIT ...................................................................................................................................................... 3
1.11 CLEARANCE FROM COMBUSTIBLE MATERIAL ............................................................................................................. 4
PART 2 AIR INLET AND VENTING ............................................................................................................................................. 8
2.1 GENERAL VENTING GUIDE ........................................................................................................................................... 8
2.2 CATEGORY IV VENTING ................................................................................................................................................ 8
2.2.1 App oved Venting Mate ials Catego y IV .................................................................................................................... 8
2.3 CATEGORY II VENTING ................................................................................................................................................. 9
2.3.1 App oved Venting Mate ials Catego y II ..................................................................................................................... 9
2.4 COMBINED COMBUSTION AIR INLET ........................................................................................................................... 9
2.5 VENT TERMINATION AND AIR INLET CLEARANCES .................................................................................................... 10
2.5.1 Sidewall Venting ........................................................................................................................................................ 10
2.5.2 Sidewall Ai Inlet ....................................................................................................................................................... 10
2.5.3 Sidewall Concent ic Vent/Ai .................................................................................................................................... 11
2.6 Ve tical Di ect Venting ............................................................................................................................................... 11
PART 3 GAS CONNECTION ..................................................................................................................................................... 13
3.1 GAS CONNECTION ..................................................................................................................................................... 13
3.2 GAS PIPING ................................................................................................................................................................ 13
3.3 INSTALL PIPING ......................................................................................................................................................... 13
3.4 CHECKING GAS SUPPLY PRESSURE ............................................................................................................................ 13
3.5 HIGH and LOW GAS PRESSURE SWITCHES (Optional) ............................................................................................... 14
3.6 AIR/GAS RATIO VALVE ............................................................................................................................................... 14
3.7 BURNER...................................................................................................................................................................... 14
PART 4 WATER CONNECTION ................................................................................................................................................ 15
4.1 FREEZE PROTECTION OUTDOOR INSTALLATION ....................................................................................................... 15
4.2 WARNING REGARDING CHILLED WATER SYSTEMS ................................................................................................... 16
4.3 INLET AND OUTLET CONNECTIONS ........................................................................................................................... 16
4.4 MINIMUM PIPE SIZE REQUIREMENTS ....................................................................................................................... 16
4.5 HEAT EXCHANGER ..................................................................................................................................................... 16
4.6 LOW WATER TEMPERATURE SYSTEMS ...................................................................................................................... 16
4.7 PIPING ARRANGEMENTS ........................................................................................................................................... 16
4.7.1 Field Supplied Components ...................................................................................................................................... 16
4.8 FLOW PROVING DEVICE (wall mount models and combination models only) .......................................................... 18
4.9 WATER FLOW SWITCH (Floo mount hyd onic and DHW models only) .................................................................... 18
4.10 LOW WATER CUTOFF (If Equipped) ........................................................................................................................... 18
4.11 RELIEF VALVE ............................................................................................................................................................. 18
4.12 DHW TUNING VALVE (combination models only) ..................................................................................................... 18
PART 5 ELECTRICAL & CONTROLS .......................................................................................................................................... 19
5.1 ELECTRICAL CONECTIONS .......................................................................................................................................... 19
5.2 HIGH LIMIT ................................................................................................................................................................. 19
5.3 DYNAMAX CONTROLLER ............................................................................................................................................ 19
5.3.1 SERVICE PARTS .......................................................................................................................................................... 19
5.3.2 IGNITION MODULE LOCKOUT FUNCTIONS ............................................................................................................... 19
5.4 ERROR TABLE ............................................................................................................................................................. 20

5.4.1 Manual Reset Codes .................................................................................................................................................. 20
5.4.2 Automatic Reset Codes ............................................................................................................................................. 20
PART 6 CONTROL PANEL ....................................................................................................................................................... 21
6.1 DYNAMAX CONTROLLER ............................................................................................................................................ 21
6.2 SETTING THE DYNAMAX CONTROLLER ...................................................................................................................... 21
6.3 CENTRAL HEATING MODES ........................................................................................................................................ 21
6.4 DOMESTIC HOT WATER MODES ................................................................................................................................ 22
PART 7 COMPONENTS ........................................................................................................................................................... 23
7.1 DIRECT SPARK IGNITER .............................................................................................................................................. 23
7.2 FLAME SENSOR .......................................................................................................................................................... 23
7.3 COMBUSTION AIR FAN .............................................................................................................................................. 23
7.4 GAS VALVE ................................................................................................................................................................. 23
7.5 OUTER JACKET ........................................................................................................................................................... 23
PART 8 LABVISION SOFTWARE .............................................................................................................................................. 24
8.1 INSTALLING LABVISION DRIVER ON WINDOWS XP ................................................................................................... 24
8.2 INSTALLING LABVISION DRIVER ON WINDOWS 7 ..................................................................................................... 24
8.3 STARTING UP LAB VISION .......................................................................................................................................... 24
8.4 ADJUSTING FAN SPEEDS ............................................................................................................................................ 25
8.5 LABVISION CENTRAL HEATING .................................................................................................................................. 26
8.5.1 Cent al Heating Mode, Installe Level ....................................................................................................................... 26
8.5.2 Cent al Heating Mode = 1, 2, 3 Installe Level .......................................................................................................... 27
8.6 LABVISION DOMESTIC HOT WATER ........................................................................................................................... 27
8.6.1 DHW Mode = 0, Installe Level .................................................................................................................................. 27
8.6.2 DHW Mode 1, 2 Installe Level .................................................................................................................................. 27
8.6.3 DHW Mode 4, Installe Level .................................................................................................................................... 28
8.7 LABVISION CASCADE .................................................................................................................................................. 29
8.8 DATA LOGGING .......................................................................................................................................................... 30
8.8.1 P ocedu e fo Viewing Log Files in Mic osoft® Excel ................................................................................................ 31
8.8.2 Analysis of Mic osoft® Excel Log File......................................................................................................................... 31
8.9 E o Histo y .............................................................................................................................................................. 32
PART 9 DYNAMAX CONTROL PANEL ..................................................................................................................................... 33
9.1 INTRODUCTION TO THE DYNAMAX CONTROL PANEL ............................................................................................... 34
9.2 MENU SCREEN ........................................................................................................................................................... 35
9.3 SYSTEM MONITOR DISPLAY ....................................................................................................................................... 36
9.4 DISPLAY OPTIONS DISPLAY ........................................................................................................................................ 37
9.5 CENTRAL HEATING DISPLAY ....................................................................................................................................... 38
9.6 DOMESTIC HOT WATER DISPLAY ............................................................................................................................... 39
9.7 CASCADE CONTROL ................................................................................................................................................... 41
9.8 BOILER CONTROL ....................................................................................................................................................... 42
9.9 ERROR SCREEN ........................................................................................................................................................... 42
PART 10 TROUBLESHOOTING .................................................................................................................................................. 43
10.1 SETTING THE CORRECT COMBUSTION....................................................................................................................... 53
10.2 GAS VALVE ADJUSTMENT PROCEDURE ..................................................................................................................... 53
PART 11 MAINTENANCE .......................................................................................................................................................... 55
11.1 EXAMINE THE VENTING SYSTEM ............................................................................................................................... 55
11.2 VISUALLY CHECK MAIN BURNER FLAMES .................................................................................................................. 55
11.3 CLEANING BOILER HEAT EXCHANGER ....................................................................................................................... 55
11.4 CONDENSATE TREATMENT ........................................................................................................................................ 56
11.5 IGNITER AND FLAME SENSOR ELECTRODES .............................................................................................................. 56
11.6 CHECK IGNITER GROUND WIRING ............................................................................................................................. 56
11.7 BURNER MAINTENANCE ............................................................................................................................................ 56
11.7.1 Bu ne Removal and Cleaning ................................................................................................................................... 56
11.8 REMOVAL OF COMBUSTION CHAMBER LINING ........................................................................................................ 57
11.9 COMBUSTION AND VENTILATION AIR ....................................................................................................................... 57
11.10 GAS VALVE VOLTAGE ................................................................................................................................................. 57
11.11 COMBUSTIBLE MATERIALS ........................................................................................................................................ 57

11.12 FREEZE PROTECTION FOR INDOOR & OUTDOOR INSTALLATIONS ............................................................................ 57
11.13 FREEZE PROTECTION FOR A HEATING BOILER SYSTEM (Optional) ............................................................................ 58
PART 12 INSTALLATIONS ......................................................................................................................................................... 58
12.1 CHECKING THE INSTALLATION ................................................................................................................................... 58
12.2 CHECKING THE CONSTRUCTION ................................................................................................................................ 58
12.3 HEATING BOILER INSTALLATIONS .............................................................................................................................. 58
12.4 INSPECT & RECHARGE CONDENSATE COLLECTION/NEUTRALIZING RESERVOIR ....................................................... 59
12.5 WATER CONNECTIONS .............................................................................................................................................. 59
12.6 PIPING LENGTHS ........................................................................................................................................................ 59
12.7 SUMMARY.................................................................................................................................................................. 59
12.8 DOMESTIC HOT WATER WITH STORAGE TANK ......................................................................................................... 60
12.9 DOMESTIC HOT WATER WITH PLATE HEAT EXCHANGER .......................................................................................... 60
12.10 TEMPERATURE RISE AT FULL FIRING RATE ................................................................................................................ 60
12.11 SETTING THE CORRECT COMBUSTION....................................................................................................................... 61
12.12 CASCADE SETUP ......................................................................................................................................................... 61
12.13 INTERFACE MODULE (if equipped) ............................................................................................................................ 63
12.14 W ite Functionality .................................................................................................................................................... 66
12.14.1 W ite CH Setpoint ..................................................................................................................................................... 66
12.14.2 W ite DHW Setpoint ................................................................................................................................................. 66
12.15 Ala m Output (if equipped) ....................................................................................................................................... 66
12.16 Exte nal Reset (if equipped) ...................................................................................................................................... 67
12.17 0-10Vdc Exte nal Input (if equipped) ........................................................................................................................ 67
12.18 APPLIANCE ................................................................................................................................................................. 67
12.19 IGNITION CYCLE ......................................................................................................................................................... 68
PART 13 PIPING DIAGRAMS .................................................................................................................................................... 69
PART 14 EXPLODED VIEW & PARTS LIST.................................................................................................................................. 74
PART 15 ELECTRICAL DIAGRAMS ............................................................................................................................................. 82
15.1 DM 80- 250 INTERNAL WIRING DIAGRAM (WALL HUNG MODELS) .......................................................................... 82
15.2 DM 210-299 INTERNAL WIRING DIAGRAM (FLOOR MOUNT MODELS) .................................................................... 83
15.3 848IF Inte face Module Wi ing Schematic ................................................................................................................ 84
15.4 FIELD WIRING............................................................................................................................................................. 85
15.4.1 System Senso ........................................................................................................................................................... 85
15.4.2 Cascade Setup ........................................................................................................................................................... 85
15.5 DETAILED CONNECTOR DESCRIPTION ....................................................................................................................... 86

1
PART 1 GENERAL
INFORMATION
1.1 INTRODUCTION
The DynaMax boiler is a fan assisted boiler based on a
push through design which offers several venting options.
Heat output is controlled by a one to one air/gas ratio
control gas valve which provides seamless modulation. The
boiler provides central heating, domestic hot water or
combination heating with DHW priority at working pressure
up to 160 PSI. It is designed for use with a fully pumped
and pressurized water system. The boiler/water heater will
automatically modulate to provide heat outputs from 100%
down to approximately 20% of rated input.
The DynaMax utilizes a negative pressure gas valve. The
operation of the fan will generate a negative pressure in the
venturi, which draws in a matching amount of gas through
the valve.
During operation the DynaMax maintains steady state
efficiency across the entire range of modulation. Air and
gas are metered in precise proportion (1:1 Ratio) allowing
combustion characteristics which determine efficiency to
remain the same over the entire operating range.
The DynaMax is designed so that all of the sensible heating
value and most of the latent heat is being transferred to the
water.
1.2 SPECIAL INSTRUCTIONS TO OWNER
This manual supplies information for the installation,
operation and servicing of the appliance. It is strongly
recommended that this manual be reviewed completely
before proceeding with an installation
CAUTION
It is important that all gas appliances are installed by a
qualified installer/technician. It is in your own interest and
that of safety to ensure that all local codes, and all the
following “NOTES” and “WARNINGS” are complied with.
Installing, servicing or adjusting this appliance should be
performed only by a qualified installer/technician that is
trained by Camus Hydronics. The serviceman must utilize a
combustion analyzer with CO
2
, CO, and draft gauge, to set
the appliance according to Camus Hydronics’
recommendation
s
,
prior
to commission
ing.
NOTE
RETAIN THIS MANUAL FOR FUTURE REFERENCE
1.3 CHECKING EQUIPMENT
Check for signs of shipping damage upon receiving
equipment. Pay particular attention to parts accompanying
the boiler, which may show signs of being hit or otherwise
being mishandled. Verify total number of pieces shown on
packing slip with those actually received. In case there is
damage or a shortage, immediately notify carrier.
1.4 DISPLAY UNIT
The display unit will indicate status and will display selected
temperature. Refer to Part 9 DynaMax Control Panel, which
provides details to modes and error codes displayed on the
appliance.
1.5 SEQUENCE OF OPERATION
1) Power switch is placed in the “ON” position.
2) Minimum 120 VAC 60Hz single phase (15A circuit) is
supplied to the DynaMax field connection board.
3) 120 VAC power is supplied to the DynaMax Controller
which provides all setup and ignition control functions.
4) Access to settings is through the use of a USB A-to-B
cable using a laptop computer through the USB port on
the DynaMax Control Panel.
5) After the appliance water pump starts, flow is proven
by the flow proving device or flow switch. The normally
open dry contacts in the low water cutoff (LWCO), if
supplied, is to be wired in series with the normally open
contacts of the flow proving device.
6) Locate the probe type LWCO in the piping at least 3
feet above the boiler/ inlet connection. In all cases
check with local codes.
7) Depending on the selected mode, the appliance
operates as a master or slave configuration.
8) The DynaMax Controller initiates a startup sequence
once it receives a heat demand.
9) The DynaMax Controller energizes the on-board pump
and starts to ramp up the voltage to the electrically
commutated DC motor of the combustion fan.
10) The fan will run at pre-purge speed until the pre-purge
timer is satisfied. Once this is complete the DynaMax
controller provides a signal to modulate down to
ignition fan speed.
11) The DynaMax controller goes through internal safety
checks and if this is satisfied the ignition sequence
begins.
12) The DynaMax Controller supplies voltage to the air/gas
ratio control valve. The air/gas ratio control valve
senses the pressure across the venturi and supplies
gas to pre-mix with air.
13) The igniter will continue to spark for 6 seconds, with
the gas valve opened, and the fan running at ignition
speed.
14) Spark Igniter lights the air/gas mixture. The DynaMax
Controller looks for a minimum flame rectification
signal of 1.25 µA DC from the flame sensor. If the
signal is present the DynaMax Controller will allow the
gas valve to remain open. The burner is now firing at
starting input rate.
15) Boiler will modulate to the correct fan speed to meet
heat demand. The modulation rate is controlled via
Pulse Width Modulation (PWM) signal.
16) Fan speed will slowly decrease as heat request nears
the heat demand. If heat demand is sustained for a
long duration of time the boiler will get to a point of
steady-state and the fan will rotate at constant speed.
17) When the heat demand is satisfied or is removed the
burner will shut off and the fan speed will ramp up to
the preset post-purge speed until the post-purge timer
is satisfied.
18) The boiler will then go into standby as it waits for the
next heat demand.
1.5.1 Heat Transfer Process
1) Burner input continues to increase until outlet water
temperature reaches the setpoint temperature.
2) Burner input may stabilize at a fixed rate where
demand equals input.
3) Burner input will decrease rate when outlet water
temperature approaches temperature Set Point.

2
1.5.2 End of Sequence
1) Setpoint temperature is satisfied.
2) Power to the gas valve is turned off.
3) Combustion Air Fan ramps to a stop over the factory
preprogrammed time period.
4) Thermostat is now in standby mode waiting for the next
“Call for Heat”.
WARNING
To minimize the possibility of serious personal injury, fire or
damage to your appliance, never violate the following
safety rules.
DO NOT
Do not use this appliance if any part of it has been
under
water. The possible damage to a flooded appliance can be
extensive and present numerous safety hazards. Any
appliance that has been under water must be replaced
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.
• 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.
IMPORTANT
Consult and follow local Building and Fire Regulations and
other Safety Codes that apply to this installation. Contact
the local gas utility company to inspect and authorize all
gas and flue connections.
Installation and service must be per
formed by a
qualified technician/installer, and trained by Camus
Hydronics.
WARNING
Should overheating occur or the gas supply fails to shut off,
DO NOT turn off or disconnect the electrical supply to the
pump. Shut off the gas supply at a location external to the
appliance.
•Boilers and water heaters are heat producing
appliances. To avoid damage or injury, do not store
materials against the appliance or the vent-air inlet
system. Use proper care to avoid unnecessary contact
(especially children) with the appliance and vent-air
inlet components.
•Never cover appliance, lean anything against it, store
trash or debris near it, stand on it or in any way block
the flow of fresh air to appliance.
•UNDER NO CIRCUMSTANCES may flammable
materials such as gasoline or paint thinner be used or
stored in the vicinity of this appliance, vent-air inlet
system or any location from which fumes could reach
the appliance or vent-air inlet system.
•A gas appliance that draws combustion air from the
equipment room where it is installed must have a
supply of fresh air circulating around it during burner
operation for proper gas combustion and proper
venting.
1.6 INSTALLATION CODES
The equipment shall be installed in accordance with
those installation regulations enforced in the local area
where the installation is to be made. These shall be
carefully followed in all cases. Authorities having jurisdiction
shall be consulted before installations are made. In the
absence of such requirements, the installation shall
conform to the latest edition or current as amended of the
National Fuel Gas Code, ANSI Z223.1 and/or CAN/CGA-
B149 Installation Code. All electrical wiring must be done in
accordance with the requirements of the authority having
jurisdiction or, in the absence of such requirements, with
national electrical code, ANSI/NFPA70 and/or the Canadian
electrical code part 1 CSA C22.1. Where required by the
authority having jurisdiction, the installation must conform to
American Society of Mechanical Engineers Safety Code for
Controls and Safety Devices for Automatically Fired Boilers,
ASME CSD-1. All boilers must conform to the latest edition
of the ASME Boiler and Pressure Vessel Code, Section II.
Where required by the authority having jurisdiction, the
installation must comply with the CSA International,
CAN/CGA-B149 and/or local codes. This appliance meets
the safe lighting performance criteria with the gas manifold
and control assembly provided, as specified in the ANSI
standards for gas-fired units, ANSI Z21.13.
1.7 WARRANTY
•Factory warranty (shipped with unit) does not
apply to units improperly installed or improperly
operated.
•Factory warranty shall apply only when the
appliance 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 stainless steel coils or tubes is not a fault
of the appliance and is not covered by warranty.
Consult the factory for recommendations for use in
hard water areas. (See Water Treatment and
Water Chemistry)
•Using or storing corrosive chemicals in the
vicinity of this appliance can rapidly attack the
stainless steel venting and heat exchanger coils
and voids warranty.
•Damage caused by freezing or dry firing voids
warranty.
•This appliance is not to be used for temporary
heating of buildings under construction.
•The manufacturer shall NOT be held liable for any
personal injury or property damage due to ice
formation or the dislodging of ice from the vent
system or the vent termination
1.8 REMOVAL OF EXISTING APPLIANCE
When an existing appliance 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
appliance, 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.
•Seal any unused openings in the common venting
system.
•Visually inspect the venting system for proper size
and horizontal pitch and determine that there is no
blockage, restriction, leakage, corrosion or other

3
deficiency, which could cause an unsafe condition.
•Insofar as is practical, close all building doors and
windows and all doors between the spaces in
which the appliances remaining connected to the
common venting system are located and other
spaces of the building. If applicable turn on the
clothes dryers and any appliances 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 dampers.
•Place in operation the appliance being inspected.
Follow the lighting instructions. Adjust thermostat
so that appliance operates continuously.
•Test for spillage at the draft control device relief
opening after 5 minutes of main burner operation.
Use a cold mirror, the flame of a match, or a
candle or smoke from a cigarette.
•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 that the installation
conforms to the National Fuel Gas Code, ANSI
Z223.1 and/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 and
/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 main manual gas shut-off
and allow appliance to cool down.
2) Remove the vent pipe at connection to heat exchanger
and check heat exchanger and vent for obstruction and
clean as necessary.
3) Remove burner from appliance and carefully clean as
required. Never brush or wipe the knitted metal fiber
surface. Use a garden hose or gently wash under the
tap. Vacuum out any deposits found in the heat
exchanger.
CAUTION
Never use a pressure washer or compressed air to clean
the burner.
4) Reinstall parts removed in steps 2 and 3. Be sure that
vent pipe has proper pitch and is properly sealed.
Replace any damaged gasket or refractory. Tighten fan
flange mounting nuts to 3 ft-lb.
5) Restore electrical power and gas supply to appliance.
6) Place appliance in operation using lighting instructions
provided.
7) Confirm proper operation of all safety devices
8) Check for gas leaks and proper vent operation.
NOTE
Experience has shown that improper installation or
system design, rather than faulty equipment, is the cause
of most operating problems
1.9 BOILER/FURNACE ROOM OPERATING
CONDITION
•Due to low jacket losses from the appliance,
temperatures in the vicinity of the boiler room may drop
significantly; supplemental heat is required to maintain
ambient temperature at acceptable levels.
1.10 LOCATION OF UNIT
Install this appliance in a clean, dry location with adequate
service clearance.
•Do not locate this appliance in an area where it will be
subject to freezing unless precautions are taken.
Radiant losses from the DynaMax are minimal and
should not be relied on to keep the appliance room
warm.
•The appliance should be located close to a floor drain
in an area where leakage from the appliance or
connections will not result in damage to the adjacent
area or to lower floors in the structure, it is
recommended that a suitable drain pan, adequately
drained, be installed under the unit. Under no
circumstances is the manufacturer to be held
responsible for water damage in connection with this
unit, or any of its components.
•If the appliance is installed above the level of the
building’s radiation system, a low water cut-off device
must be installed in the appliance outlet at a minimum
of 3 ft (1M) above the heat exchanger inlet/outlet
connections. Some local codes require the installation
of a low water cut-off on all systems
•When placing the appliance be aware that a minimum
clearance of 24” must be provided at the front to allow
easy access to the heat exchanger. DynaMax wall
mount units do not require access through the sides
and can be placed adjacent to each other with zero
clearance. Floor mount units require access on the left
side.
•The appliance must be installed so that the ignition
system components are protected from water
(dripping, spraying, etc.) during appliance operation
and service (circulator replacement, control
replacement, etc.)
•Appliances located in a residential garage and in
adjacent spaces that open to the garage and are not
part of the living space of a dwelling unit must be
installed so that all burners and burner ignition devices
have a minimum clearance of not less than 18" (46cm)
above the floor. The appliance must be located or
protected so that it is not subject to physical damage
by a moving vehicle.
•DO NOT install this appliance in any location where
gasoline or flammable vapors are likely to be present.
•Appliance must be installed on a level floor. Maintain
required clearances from combustible surfaces.

4
•The appliance designed for indoor installation (Indoor
Models) must be installed indoors where it is protected
from exposure to wind, rain and weather.
•The appliance designed for outdoor installation
(Outdoor Models) must be installed outdoors. Always
consider the use of a shelter such as a garden shed in
lieu of direct exposure of the appliance to the
elements. The additional protection afforded by the
shelter will help to minimize nuisance problems with
electrical connections and will allow easier servicing of
the appliance under severe weather conditions.
1.11 CLEARANCE FROM COMBUSTIBLE
MATERIAL
This appliance is suitable for alcove (a closet without a
door) installation with minimum clearances to combustibles
as follows:
Table 1: Clearance from Combustibles
Clearances from Combustibles
Wall Hung
Model
Floor Mount
Model
TOP: 0”
0"
SIDES: 0”
0"
REAR: 0”
12"
VENT (Vent Adapter): 1”
1"
VENT (PVC/CPVC): 0”
0"
FRONT: 3”
6”
Figure 1: Wall Hung Clearance from Combustibles
Figure 2: Floor Mount Clearance from Combustibles
NOTE
Clearances from combustible construction are noted on the
appliance rating plate
1” F om
oute edge
of adapte
PVC/CPVC/PPE Vent Pipe
Single Wall Vent Adapte

5
Table 2: DynaMax Wall Hung Service Clearances
Model Service Clearance, Inches (cm)
Front Top Right Side Left Side Rear
80 24” (61cm) 3” (8 cm) 4” (10 cm) 4” (10 cm) 0” (0 cm)
100 24” (61cm) 3” (8 cm) 4” (10 cm) 4” (10 cm) 0” (0 cm)
150 24” (61cm) 3” (8 cm) 4” (10 cm) 4” (10 cm) 0” (0 cm)
200 24” (61cm) 3” (8 cm) 4” (10 cm) 4” (10 cm) 0” (0 cm)
250 24” (61cm) 3” (8 cm) 4” (10 cm) 4” (10 cm) 0” (0 cm)
Figure 3: DynaMax Wall Hung Model Dimensions
Table 3: Appliance Dimensions and Specifications
Model Depth Dim.
"A" [in.]
Dim.
"B"
[in.]
Equivalent
Length of Vent & Air
Intake Pipes at Recommended
Diameter, [in.] Water
Connection
at Boiler
[in.] NPT
Gas Connection
at Boiler [in.] NPT
Over 25'
and up to
100'
Over 15'
and up to
25' Up to 15'
80 16 1/2 12 3 3 2 1 1/2
100
16 1/2
12
3
3
2
1
1/2
150 16 1/2 12 3 3 2 1 1/2
200
23 1/2
19
3
3
2
1
1/2
250 23 1/2 19 3 3 2 1 1/4 1/2
Maintain minimum specified clearances for adequate operation. All installations must allow sufficient space for servicing the vent
connections, water pipe connections, circulating pump, bypass piping and other auxiliary equipment, as well as the appliance

6
Table 4: DynaMax Floor Mount Service Clearances
Model Service Clearance, Inches (cm)
Front Top Right Side Left Side Rear
210 12” (31cm) 24” (61cm) 0” (0cm) 12” (31cm) 14” (36 cm)
260 12” (31cm) 24” (61cm) 0” (0cm) 12” (31cm) 14” (36 cm)
299 12” (31cm) 24” (61cm) 0” (0cm) 12” (31 cm) 14” (36cm)
399 12” (31cm) 24” (61cm) 0” (0cm) 12” (31 cm) 14” (36 cm)
500 12” (31cm) 24” (61cm) 0” (0cm) 12” (31 cm) 14” (36 cm)
600 12” (31cm) 24” (61cm) 0” (0cm) 12” (31 cm) 14” (36cm)
700 12” (31cm) 24” (61cm) 0” (0cm) 12” (31 cm) 14” (36 cm)
800 12” (31cm) 24” (61cm) 0” (0cm) 12” (31 cm) 14” (36 cm)
Figure 4: DynaMax Floor Mount Model Dimensions
Table 5: Appliance Dimensions and Specifications
Model
Dim.
"A"
[in.]
Dim.
"B"
[in.]
Dim.
"C"
[in.]
Dim.
"D"
[in.]
Dim.
"E"
[in.]
Dim.
"F"
[in.]
Dim.
"J"
[in.]
Equivalent Length of Vent & Air Intake
Pipes at Recommended Diameter, [in.] Water
Conn.
at
Heater
[in.]
NPT
Gas
Conn.
at
Boiler
[in.]
NPT
Category IV CAT.II
Comb.
Vents
Over 25'
and up
to 100'
Over 15'
and up
to 25'
Up to
15'
210 36 22 3/4 14 1/4 23 24 1/4 34 1/4 32 3 3 2 4 1 1/2
260 36 22 3/4 14 1/4 23 24 1/4 34 1/4 32 3 3 2 4 1 1/4 1/2
299 47 1/8 34 7/8 14 23 29 7/8 33 7/8 32 4 3 3 5 1 1/4 3/4
399 47 1/8 34 7/8 14 23 29 7/8 33 7/8 32 4 3 3 5 1 1/2 1
500 47 1/8 34 7/8 14 23 29 7/8 33 7/8 32 4 3 3 6 1 1/2 1
600 47 1/8 36 1/4 14 23 30 3/4 38 40 1/2 4 3 3 6 2 1
700 47 1/8 36 1/4 14 23 30 3/4 38 40 1/2 4 (Air), 6
(Vent) 4 4 7 2 1
800 47 1/8 36 1/4 14 23 30 3/4 38 40 1/2 5 (Air), 6
(Vent) 5 5 7 2 1
Maintain minimum specified clearances for adequate operation. All installations must allow sufficient space for servicing the vent
connections, water pipe connections, circulating pump, bypass piping and other auxiliary equipment, as well as the appliance

7
Figure 5: DynaMax Wall Hung Service Clearances
Figure 6: DynaMax Floor Mount Service Clearances

8
PART 2 AIR INLET AND VENTING
It is extremely important to follow these venting
instructions carefully. Failure to do so can cause severe
personal injury, death or substantial property damage.
2.1 GENERAL VENTING GUIDE
The DynaMax Wall Hung is a category IV condensing
appliance, 97% efficient unit. The DynaMax Floor Mount is a
category II condensing appliance, 97% efficient.
•The DynaMax may be vented with: manufactured
prefabricated UL/ ULC listed vents of AL29-4C or
316L stainless steel or with plastic vent certified to
UL/ ULC S636, such as, IPEX System 636 CPVC
or IPEX System 636 PVC or as permitted by local
jurisdictions.
•The DynaMax boiler must be vented and supplied
with combustion and ventilation air as described in
this section. Ensure that the venting and
combustion air supply complies with these
instructions.
•Installations must be in accordance with Part 7,
“Venting of Equipment”, of the latest edition of the
National Fuel Gas Code, ANSI Z223.1 for US
installations or the latest edition of CAN/CGA
Standard B149 Installation Code for Gas Burning
Appliances and Equipment in Canada.
•The distance of the vent terminal from adjacent
buildings, windows that open and building openings
MUST comply with the latest edition of the National
Fuel Gas Code, ANSI Z223.1 for U.S. installations
or CAN/CGA Standard B149 Installation Code for
Canadian Installations.
•Vent connection is made directly to the flue outlet
opening on top of the unit for the wall mount unit
and at the back of the unit for floor mount. The
connection from the appliance vent to the stack
must be made as direct as possible. The first 3 feet
of vent from the appliance flue outlet must be
readily accessible for visual inspection.
•Vent connectors serving appliances vented by
natural draft shall not be connected into any portion
of a mechanical draft system operating under
positive pressure.
•A UL listed concentric vent/air intake kit may be
used with the DynaMax.
•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 appliance to the vent terminal.
•The weight of the venting system must not rest on
the unit. Adequate support of the venting system
must be provided in compliance with local codes
and other applicable codes.
•All connections should be secured and sealed per
the vent manufacturer’s specifications. When a
positive vent system is disconnected for any
reason, the flue must be reassembled and resealed
according to the vent manufacturer’s instructions.
•Do not use an existing chimney as a raceway if
another appliance or fireplace is vented through the
chimney.
•Inspect completed vent and air supply piping
thoroughly to ensure all connections are sealed and
are in compliance with the instructions provided and
satisfy requirements of all applicable codes.
NOTE
All vent pipes must be properly assembled and supported,
and the exhaust must be pitched a minimum of 1/4 inch per
foot back to the boiler. All components used to fabricate and
assemble the vent system are to originate from the same
supplier.
When determining equivalent inlet air and vent lengths of 3”
diameter add 3 to 5 feet for each 90
o
elbow and 2 to 3 feet
for each 45
o
elbow, depending on centerline radius of the
elbow.
Example: 30 feet of CPVC pipe + (3 x 5 feet) 90
o
elbows + (1
x 3 feet) 45
o
elbow = 48 equivalent feet of piping for
centerline radius of 1.5D, where D is the pipe diameter.
2.2 CATEGORY IV VENTING
A category IV appliance is individually vented through a
dedicated vent.
The DynaMax Wall Hung boilers/ water heaters shall only be
vented as a Category IV appliance.
Both Wall Hung and Floor Mount appliances shall be vented
using sealed positive vent suitable for a condensing
appliance with the following venting options:
1) Sidewall or rooftop termination where both the vent and
combustion air inlet air are in the same zone. The inlet
and vent terminals are to be installed with a minimum
12” separation distance between centerline of inlet and
centerline of exhaust. Refer to Fig. 8, 9, and 10 for
sidewall termination and Fig. 11 for rooftop termination.
2) Sidewall termination with vent and combustion air inlet
from separate zones.
3) Single Pipe thru wall or rooftop venting with combustion
air inlet from the boiler room.
NOTE
Vent Option 3 not recommended for R-2000 homes or
equivalent air tight construction.
2.2.1 Approved Venting Materials Category IV
1) PVC and CPVC (Chlorinated Polyvinyl Chloride)
Schedule 40 or 80 approved to ULC S636.
2) Manufactured prefabricated UL/ULC listed vent of AL29-
4C or 316L stainless steel. Use of 316L is limited to use in
applications where there is no possibility of contaminants
in the air such as refrigerants, chlorine etc.
3) PVC-DWV approved to comply with ANSI/ASTM D2665
(US Jurisdictions ONLY when permitted)
4) PVC Schedule 40 approved to comply with ANSI/ASTM
D1785. (US Jurisdictions ONLY when permitted)
5) CPVC Schedule 40 approved to comply with
ANSI/ASTM F441. (US Jurisdictions ONLY when
permitted)
6) Polypropylene approved to comply with ULC S636

9
Table 6: Maximum Flue Temperature for Various Vent Materials
Vent Material Maximum Flue Temperature [
o
F]
PVC 149
CPVC 194
PPE 230
AL29-4C 300+, limited only by rating of seals
316L Stainless
Steel 300+, limited only by rating of seals
Stack temperature is between 15-30
o
F above inlet water
temperature .
Air Inlet (Supply Air or Fresh Air) Piping
•PVC
•CPVC (Chlorinated Polyvinyl Chloride)
•PPE (Polypropylene)
•ABS (Acrylonitrile-Butadiene-Styrene)
•Single wall, Galvanized
•Single wall, Stainless steel
•Single wall, Aluminium
Single wall air inlet pipes are to be insulated 5 feet from the
wall toward the interior of the building to minimize external
sweating.
The following air intake options shall be utilized:
•Outside air sealed direct (vertical or horizontal)
•Outside air ducted to jacket flange
•Indoor Air
NOTE
For wall hung units that are installed outdoors the bottom of
the unit must be at least 36” above ground or 12” above
normal snow levels.
NOTE
Sealed combustion is required when DynaMax is placed in a
space with other fan-assisted appliances.
Table 7: Required Vent and Air Inlet Diameters
Equivalent Length of Vent & Air Intake Pipes
at Recommended Diameter*
Model
Category IV Category
II
Over 25' and up
to 100'
Over 15'
and up
to 25'
Up
to
15'
80 3" 3" 2" -
100 3" 3" 2" -
150 3" 3" 2" -
200 3" 3" 2" -
210 3" 3" 2" 4”
250 3" 3" 2" -
260 3" 3" 2" 4”
299 4" 3" 3" 5”
399 4" 3" 3" 5”
500 4" 3" 3" 6”
600 4” 3” 3” 6”
700 4” (Air), 5” (Vent) 4” 4” 7”
800 5” (Air), 6” (Vent) 5” 5” 7”
* Consult factory for recommendations applicable to venting
combinations not shown above.
2.3 CATEGORY II VENTING
A category II appliance may be combined into a common
negative pressure venting system designed to ASHRAE
requirements using a proven vent sizing program. Vent
designs are to be certified by a qualified professional
designer acceptable to the authority having jurisdiction.
1) The DynaMax Floor Mount boiler may be vented as a
Category II appliance using sealed vent suitable for a
condensing appliance.
2.3.1 Approved Venting Materials Category II
1) PVC and CPVC Schedule 40 or 80 approved to ULC
S636.
2) Manufactured prefabricated UL/ULC listed vent of AL29-
4C or 316L stainless steel. Use of 316L is limited to use
in where there is no possibility of contaminants in the air
such as refrigerants, chlorine etc.
3) PVC-DWV approved to comply with ANSI/ASTM D2665
(US Jurisdictions ONLY when permitted).
4) PVC Schedule 40 approved to comply with ANSI/ASTM
D1785. (US Jurisdictions ONLY when permitted)
5) CPVC Schedule 40 approved to comply with
ANSI/ASTM F441. (US Jurisdictions ONLY when
permitted).
6) Polypropylene approved to comply with ULC S636
Air Inlet (Supply Air or Fresh Air) Piping
•PVC
•CPVC (Chlorinated Polyvinyl Chloride)
•ABS (Acrylonitrile-Butadiene-Styrene)
•PPE (Polypropylene)
•Single wall, Galvanized
•Single wall, Stainless steel
•Single wall, Aluminium
Single wall air inlet pipes are to be insulated 5 feet from the
wall toward the interior of the building to minimize external
sweating.
The following air intake options shall be utilized:
•Outside air sealed direct (vertical or horizontal)
•Outside air ducted to jacket flange
•Indoor Air
NOTE
Sealed combustion is required when DynaMax is placed in a
space with other fan-assisted appliances.
2.4 COMBINED COMBUSTION AIR INLET
To avoid the possibility of nuisance lockouts in cold climates
install DynaMax appliances with a combined combustion air
inlet.
The combined combustion air inlet pipe sizing can be
calculated using the method shown below:
Equivalent pipe diameter = Sq Root [(d
1
)
2
+ (d
2
)
2
+ (d
3
)
2
+ …
+ (d
n
)
2
], where d
n
= individual pipe diameter
•Example: Find the equivalent pipe diameter of three
air inlet pipes, 3” (7.6cm), 3” (7.6cm) and 4”
(10.2cm)
Equivalent pipe diameter = Sq Root[(3)
2
+ (3)
2
+
(4)
2
] = Sq Root(34) = 5.8”, select 6” (15.3cm)
equivalent diameter pipe.

10
Air inlet point for multiple boiler air inlets must be provided
with an exterior opening which has a free area equal to or
greater than the total area of all air inlet pipes connected to
the common air inlet. This exterior opening for combustion
air must connect directly to the outdoors. The total length of
the combined air inlet pipe must not exceed a maximum of
100 equivalent feet (30.5m). Deduct the restriction in an area
provided by any screens, grills or louvers installed in the
common air inlet point. Screens, grills or louvers installed in
the common air inlet can reduce the free area of the opening
from 25 to 75% based on the materials used. Calculate and
compensate accordingly.
2.5 VENT TERMINATION AND AIR INLET
CLEARANCES
2.5.1 Sidewall Venting
•The first 3 feet (1m) of vent from the appliance flue
outlet must be readily accessible for inspection.
Figure 7: Vertical Configuration
* Always check local codes for minimum distance above
ground or snow levels
Figure 8: Horizontal Configuration
* Always check local codes for minimum distance above
ground or snow levels
Location of Vent Termination
1) Total length of vent piping must not exceed limits
stated in Table 7.
2) Bottom of vent terminal shall be located at least 12”
(30cm) above grade or above normal snow levels.
In all cases the appliance shall be installed in
accordance with local codes
3) DynaMax can vent up to 100 equivalent feet.
Elbows can range from 3 to 5 feet in equivalent
length depending on the centerline radius.
4) Vent outlet shall terminate at least 12” (0.30m)
away from any forced air inlet. Vent must be at
least 7 feet (2.15m) above grade when located
adjacent to public walkways due to normal
formation of water vapour in the combustion
process.
5) Vent outlet MUST NOT terminate below a forced air
inlet at any distance.
6) Vent cannot terminate below grade. Position vent
termination where vapours will not damage walls or
plants or may be otherwise objectionable.
7) Vent terminal shall not be installed closer than 3
feet (1m) from an inside corner of an L-shaped
structure, window well, stairwell, alcove, courtyard
or other recessed area as wind eddies could affect
boiler performance or cause recirculation.
8) DO NOT terminate closer than 4 feet (1.25m)
horizontally and vertically from any electric meter,
gas meter, regulator, relief valve, or other
equipment. In all cases local codes take
precedence
9) Position terminations so they are not likely to be
damaged by foreign objects, or exposed to a build-
up of debris.
10) Vent piping must terminate in an elbow pointed
outward or away from air inlet.
11) Flue gas condensate can freeze on exterior walls or
on the vent cap. Frozen condensate on the vent
cap can result in a blocked flue condition. Keep the
vent cap/terminal clear of snow, ice, leaves, debris
etc. Some discolouration to exterior building
surfaces is to be expected. Adjacent brick or
masonry surfaces should be protected with a rust
resistant sheet metal plate.
12) Perform regularly scheduled inspections to ensure
vent terminal is unobstructed.
2.5.2 Sidewall Air Inlet
Figure 9: Sidewall Vent and Air Inlet Configuration
* Always check local codes for minimum distance above
ground or snow levels

11
Location of a Sidewall Air Inlet Cap
1) Total length of piping for air inlet must not exceed
the limits stated in Table 7.
2) Point of termination for the sidewall air inlet cap
must be located a minimum of 12 inches (0.30m)
away from the flue gas termination, but never
above.
3) Air piping must terminate in a down-turned elbow to
avoid recirculation of flue products into the inlet air
stream.
4) DO NOT terminate closer than 4 feet (1.25m)
horizontally and vertically from any electric meter,
gas meter, regulator, relief valve, or other
equipment. In all cases local codes take
precedence
5) DO NOT terminate the air inlet in a window well,
stairwell, alcove, courtyard or other recessed area
as wind eddies could affect performance or cause
recirculation.
6) Air inlet cannot terminate below grade.
7) Locate terminations so they are not likely to be
damaged by foreign objects, or exposed to build-up
of debris.
8) Perform regularly scheduled inspections to ensure
that the air inlet terminal is unobstructed.
2.5.3 Sidewall Concentric Vent/Air
A concentric vent kit can be used with the DynaMax
appliance. Both combustion air and vent pipes must
terminate outside the structure.
1) Total length for venting or air must not exceed the
limits stated in Table 7.
2) Bottom of the termination shall be located at least 1
foot (30cm) above grade or above normal snow levels.
In all cases the appliance shall be installed in
accordance with local codes
3) Termination MUST NOT terminate below a forced air
inlet at any distance
4) Termination cannot terminate below grade. Position
the termination where vapours will not damage walls
or plants or may be otherwise objectionable.
5) The termination shall not be installed closer than 3 feet
(1m) from an inside corner of an L-shaped structure,
window well, stairwell, alcove, courtyard or other
recessed area as wind eddies could affect boiler
performance or cause recirculation.
6) DO NOT terminate closer than 4 feet (1.25m)
horizontally and vertically from any electric meter, gas
meter, regulator, relief valve, or other equipment. In all
cases local codes take precedence
7) Position termination so they are not likely to be
damaged by foreign objects, or exposed to a build-up
of debris.
8) Flue gas condensate can freeze on exterior walls or
on the vent cap. Frozen condensate on the vent cap
can result in a blocked flue condition. Keep the vent
cap/terminal clear of snow, ice, leaves, debris etc.
Some discolouration to exterior building surfaces is to
be expected. Adjacent brick or masonry surfaces
should be protected with a rust resistant sheet metal
plate.
9) Perform regularly scheduled inspections to ensure that
the termination is unobstructed.
10) Operate the appliance for one heat cycle to ensure
combustion air and vent pipes are properly connected
to the concentric vent termination connections.
CAUTION
Do not operate appliance with the rain cap removed as this
may result in the recirculation of flue products. Water may
also flow into the combustion air pipe and into the burner
enclosure.
Figure 10: Concentric Sidewall Termination
Figure 11: Concentric Vent Sidewall
Termination and Fittings
The air inlet opening must be at least 12 inches (0.30m)
away from (never above) the vent termination and at least 3
feet (1m) above grade or above normal maximum snow
levels.
2.6 Vertical Direct Venting
Location of Vent Termination
1) Total length of piping for venting must not exceed
limits stated in Table 8.
2) Vent piping must terminate in a 45
o
elbow if plastic
piping is used or in an approved vent cap if using
metal venting. Vent outlet must be at least 1 foot
away and 1 foot above from the air inlet opening
which must terminate in a double elbow facing
downwards.
3) Vertical termination must be a minimum of 3 feet
(1m) above the point of exit.
4) Vertical termination less than 10 feet (3.05m) from
a parapet wall must be a minimum of 2 feet (0.61m)
higher than the parapet wall.
5) DO NOT terminate closer than 4 feet (1.25m)
horizontally and vertically from any electric meter,
gas meter, regulator, relief valve, or other
equipment. In all cases local codes take
precedence.
6) Position the air inlet and vent terminations so they
are not likely to be damaged by foreign objects, or
exposed to build-up of debris.
7) Perform regularly scheduled inspections to ensure
that the vent terminal is unobstructed.

12
Location of a Vertical Air Inlet Opening
1) The total length of piping for inlet air must not
exceed the limits given in Table 8.
2) The air inlet consists of two 90
o
elbows installed at
the point of termination for the vertical air inlet pipe.
A 90
o
elbow and a 90
o
street elbow may be used to
make this assembly. If a straight piece of pipe is
used between the two elbows, it should not exceed
6” (0.15m) in length. The air inlet opening must be
at least 1 foot below the vent opening. The air
piping must be no further than 2 feet (0.6m) from
the center of the vent pipe. This arrangement
avoids exhaust gases from re-circulating into the
inlet air stream. Refer to Figure 10.
3) Air inlet must terminate at least 3 feet (1.0m) above
the roof or normal snow levels and at least 1 foot
(0.3m) below the vent termination.
4) Locate terminations so they are not likely to be
damaged by foreign objects or exposed to build-up
of debris.
5) Perform regularly scheduled inspections to ensure
that the air inlet terminal is unobstructed.
Figure 12: Vertical Direct Venting Configuration
1) Total length of piping for venting or air must not
exceed limits stated in Table 8.
2) Bottom of the termination shall be located at least 3
feet (1m) above grade or above normal snow levels. In
all cases the appliance shall be installed in
accordance with local codes
3) Termination MUST NOT terminate below a forced air
inlet at any distance
4) Termination cannot terminate below grade. Position
the termination where vapours will not damage walls
or plants or may be otherwise objectionable.
5) Termination shall not be installed closer than 3 feet
(1m) from an inside corner of an L-shaped structure,
window well, stairwell, alcove, courtyard or other
recessed area as wind eddies could affect boiler
performance or cause recirculation.
6) DO NOT terminate closer than 4 feet (1.25m)
horizontally and vertically from any electric meter, gas
meter, regulator, relief valve, or other equipment. In all
cases local codes take precedence
7) Position termination so they are not likely to be
damaged by foreign objects, or exposed to a build-up
of debris.
8) Flue gas condensate can freeze on exterior walls or
on the vent cap. Frozen condensate on the vent cap
can result in a blocked flue condition. Keep the vent
cap/terminal clear of snow, ice, leaves, debris etc.
Some discolouration to exterior building surfaces is to
be expected. Adjacent brick or masonry surfaces
should be protected with a rust resistant sheet metal
plate.
9) Perform regularly scheduled inspections to ensure that
the termination is unobstructed.
10) Operate the appliance for one heat cycle to ensure
combustion air and vent pipes are properly connected
to the concentric vent termination connections.
CAUTION
Do not operate appliance with the rain cap removed as this
may result in the recirculation of flue products. Water may
also flow into the combustion air pipe and into the burner
enclosure.
Figure 13: Concentric Vent Vertical Venting
Length of Air Inlet Pipe
The maximum total length of the sidewall or vertical roof top
combustion air inlet pipe as installed from the appliance to
the air inlet cap must not exceed 100 equivalent feet (30.5m)
in length. Subtract 3 to 5 feet (1 to 1.5m) of equivalent length
depending on centerline radius for each 90
o
elbow installed
in the air inlet pipe system. Pressure drop in each 45
o
elbow
will be half as much, 2 to 3 feet (0.6 to 1.0m).

13
PART 3 GAS CONNECTION
Verify that the appliance is supplied with the type of gas
specified on the rating plate. Consult factory for installations
at high altitude.
3.1 GAS CONNECTION
•Safe operation of unit requires properly sized gas supply
piping. See gas line sizing data.
•Gas pipe size may be larger than appliance connection.
•Installation of a union at the appliance gas line
connection is required for ease of service and removal
of the gas train.
•Install a manual main gas shutoff valve, outside of the
appliance gas connection as require by local codes.
•A trap (drip leg) MUST be provided in the inlet gas
connection to the appliance.
•Optional gas controls may require routing of bleeds and
vents to the atmosphere, outside the building when
required by local codes.
Table 8: Recommended Gas Pipe Size
Single Appliance Installation
(For distance from natural gas meter or propane second
stage regulator)
Input 0-100 FT 101-200 FT 201-300 FT
Btu/Hr
,
x1000 NAT. L.P. NAT. L.P. NAT. L.P.
80 ¾” ½” ¾” ½” 1” ¾”
100 ¾” ½” 1” ¾“ 1” ¾”
150 1” ¾” 1 ¼” 1“ 1 ¼” 1”
200 1” ¾” 1 ¼” 1” 1 ¼” 1”
250 1 ¼” 1” 1 ¼” 1” 1 ½” 1 ¼”
299 1 ¼“ 1“ 1 ½” 1 ¼“ 1 ½“ 1 ¼“
399 1 ¼“ 1“ 1 ½“ 1 ¼“ 2“ 1 ½“
500 1 ½“ 1 ¼“ 2“ 1 ½“ 2“ 1 ½“
600 1 ½“ 1 ¼“ 2“ 1 ½“ 2“ 1 ½“
700 2 “ 1 ½“ 3“ 2 ½“ 3“ 2 ½ “
800 2 “ 1 ½“ 3“ 2 ½“ 3“ 2 ½ “
3.2 GAS PIPING
All gas connections must be made with pipe joint compound
resistant to the action of liquefied petroleum and natural gas.
All piping must comply with local codes and ordinances.
3.3 INSTALL PIPING
•The gas line should be sufficient to handle the total
installed capacity. Verify pipe size with your gas
supplier.
•Use approved piping as per code free from burrs.
•Install a manual main gas shutoff valve at the appliance
gas inlet, outside of the appliance and before the gas
valve.
•Run pipe to the Appliance gas inlet.
•Install a sediment trap in the supply line to the Appliance
gas inlet.
•Apply a moderate amount of good quality pipe
compound.
•For LP gas, consult your LP gas supplier for expert
installation.
The appliance and its individual gas shut-off valve must be
disconnected from the supply piping when pressure testing
the gas supply piping at pressures above ½ PSI
Table 9: Gas Pressures at Inlet to Appliance
PROPANE NATURAL GAS
Minimum (inches W.C.)
11
3
Maximum (inches W.C.)
11 14
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 appliance. Sizing based on
Table 4 or 6 is recommended, depending on model.
Before operating the appliance, the complete gas train and
all connections must be tested using soap solution.
Verify that the appliance is supplied with the type of gas
specified on the rating plate. Heating values of local natural
gas are to be between 950 and 1010 Btu/ft
3
. Consult factory
if heating values are outside this range or if a gas with a
mixture of constituents is being used.
3.4 CHECKING GAS SUPPLY PRESSURE
•Turn main power switch to “OFF” position.
•Shut off gas supply at the manual gas cock in the gas
piping to the appliance. If fuel supply is LP gas, shut off
gas supply at the tank.
•DM80 – 399: Loosen the slotted screw from the gas
pressure test port on the gas valve. Connect manometer
or magnahelic gauge to test port. Range of scale should
be 0 to 14 inch W.C. or greater to check inlet pressure.
•DM500 – 800: Remove the 1/8" hex plug from the gas
pressure test port located upstream of gas valve. Install
a pressure tapping suitable to connect to a manometer
or magnahelic gauge. Range of scale should be 0 to 14
inch W.C. or greater to check inlet pressure.
•Turn on gas supply at field installed manual gas cock;
turn on LP gas at tank if required.
•Turn power switch to “ON” position.
•Initialize call for heat.
•Observe the gas supply pressure as the burner fires at
100% of rated input. Supply pressure is to remain
stable.
•Ensure inlet pressure is within specified range as
specified in Table 9.
•If gas pressure is out of range, contact the gas utility,
gas supplier, qualified installer or service agency to
determine necessary steps to provide proper gas
pressure to the control.
•If gas supply pressure is within normal range, proceed
to remove gas manometer and tighten slotted screw on
gas valve (DM80 – 399) or replace pressure tap fittings
in the gas piping to the appliance (DM500 – 800). Turn
power switch to “OFF” position.
•Turn on gas supply at the manual valve; turn on LP gas
at tank if required.
•Turn power switch to “ON” position.
•Adjust set point to the desired water temperature.
•Check appliance performance by cycling the system
while you observe burner response. The burner should
ignite promptly. Flame profile should be stable, see
section 11.2, Visually Check Main Burner Flames. Turn
system off and allow burner to cool, then cycle burner
again to ensure proper ignition and flame
characteristics.

14
IMPORTANT
Upon completion of initial installation or following any repair
work on the gas system, leak test all gas connections with a
soap solution while the main burner is firing. Immediately
repair any leak found in the gas train or related components.
DO NOT operate an appliance with a leak in the gas train,
valves or related gas piping.
3.5 HIGH and LOW GAS PRESSURE SWITCHES
(Optional)
High and low gas pressure switches are available as an
option and are wired in series with the normally closed
blocked flue switch. The high gas pressure switch is used to
monitor the differential gas pressure between the outlet of
the control valve and the fan inlet. If differential gas pressure
exceeds the maximum setting of the pressure switch, the
appliance will shut down and a Blocked Flue Error will be
indicated on the display panel. The low gas pressure switch
is to monitor the minimum incoming gas supply pressure
supplied to the gas train. If gas pressure falls below the
minimum setting of the pressure switch, the appliance will
shut down and a Blocked Flue error will be displayed.
3.6 AIR/GAS RATIO VALVE
The main gas valve supplying gas to the burner on this
appliance utilizes a servo pressure regulator providing a
slow opening, fast closing safety shut off and air/gas ratio
control for the gas combustion process. The valve is a 1:1
negative pressure gas valve. The valve performs the
functions of a pressure regulator, safety shutoff, and air/gas
ratio control. Full closing of the valve seat occurs in less than
0.8 seconds when the valve is de-energized. Operation of
the gas valve in combination with the combustion air fan
allows the burner input rate to vary from 20% to 100% based
on temperature demand. The inlet gas supply pressure must
be maintained within the specified minimum and maximum
pressures as indicated in Table 9.
The air/gas ratio is preset at the factory and adjustment is
not usually required if gas supply pressure is maintained
within the specified range. There are no serviceable parts on
the air/gas ratio valve control.
Figure 14: DynaMax 80 – 250, 260 1:1 Air/Gas Ratio
Control Valve
Figure 15: DynaMax 299 – 399 1:1 Air/Gas Ratio Control
Valve
Figure 16: DynaMax 500 – 800 1:1 Air/Gas Ratio Control
Valve
3.7 BURNER
Figure 17: DynaMax Burner
This appliance uses a single cylindrical burner installed
horizontally into the cavity located in the center of the heat
exchanger. A unique burner is used for each one of the
DynaMax models.
Burners may NOT be interchanged between different Btu/hr
input models. The burner consists of a round mounting
flange welded to a ported stainless steel mixing tube. This
stainless steel tube is covered with a close fitting, knitted
stainless steel metal fiber alloy material that forms the burner
outer surface. The burner is setup to operate in blue mode
and infrared operating condition should be avoided. Infrared
operation will occur only if air to gas adjustments is incorrect.
If infrared operation is noted the cause must be corrected.
The burner should be removed for inspection and cleaning
on an annual basis. An appliance installed in a dust or dirt
contaminated environment will require inspection and
cleaning on a more frequent schedule. The fan assisted
combustion process may force airborne dust and dirt
contaminants, contained in the combustion air, into the
burner. With sustained operation, non-combustible
contaminants may reduce burner surface area, reduce
burner input or cause non-warrantable damage to the
burner.
Airborne contaminants such as dust, dirt, concrete dust or
dry wall dust can be drawn into the burner with the
combustion air and block the burner surface area. DO NOT
operate this appliance during construction.
The spark igniter and flame sensor are removable from the
combustion chamber mounting door without removing the
burner assembly.
Never use an open flame (match, lighter, etc.) to check
gas connections.
Low-fi e ai /gas atio
adjustment, use slotted
sc ewd ive fo adjustment,
clockwise inc eases CO2
High fi e adjustment:
use th ottle sc ew
located on
ventu i
Low fi e adjustment sc ew To x
40
clockwise inc eases CO
2
Gas Inlet
Low
-
fi e ai gas atio adjustment
(use To x 40 fo adjustment,
clockwise inc eases CO2)
High
-
fi e ai gas atio adjustment (Use
slotted sc ewd ive fo adjustment,
counte -clockwise inc eases CO2)
Lift top cove to access high fi e
ai /gas atio adjustment (use 3mm
allen key fo adjustment, counte -
clockwise inc eases CO2)
Gas Inlet

15
Regulated Gas Supply Pressures for DynaMax Boilers &
Water Heaters
A stable gas supply pressure is important to avoid rough
starts with machines like the DynaMax which use a 1 to 1
ratio control valve for internal gas pressure regulation.
Camus requires that all DynaMax models be supplied with
no more than 1 PSI supply pressure. This means that lockup
pressure must not exceed 1 PSI.
It is paramount that maximum lockup pressure be confirmed
before any attempt is made to start up the appliance.
Operating the DynaMax at lockup pressures exceeding 1
PSI is not recommended and could lead to delayed ignitions
and damage to the appliance.
PART 4 WATER CONNECTION
•Check all applicable local heating, plumbing and
building safety codes before proceeding.
•If the appliance is installed above radiation level it must
be provided with a low water cut-off device at the time of
appliance installation (available from Camus). Some
local codes require the installation of a low water cut-off
on all systems.
•Before connecting DynaMax to piping in a closed loop
system, flush system thoroughly and refill with clean
water and add chemical treatment to bring pH to 8.0 to
8.5 range.
•A pressure relief valve is supplied with each DynaMax.
The relief valve must be mounted in a vertical position
and piped to the floor in a manner acceptable to the
enforcing authority.
•Be sure to provide unions and gate valves at inlet and
outlet to the appliance so that it can be easily isolated
for service.
•On combination heaters a flow setter valve at the
appliance outlet facilitates setting of the desired outlet
temperature at high fire. Refer to Section 12.9 Domestic
Hot Water with Plate Heat Exchanger for more details
•This appliance is a low mass stainless steel tube design
which provides for instant heat transfer. All appliances
are supplied with an internal suitable specific pump
mounted in place. When replacing the pump, replace
with one of equal or better-performance.
•An air vent is supplied on the heat exchanger header to
eliminate trapped air. Install venting devices at high
points in the system as well to eliminate trapped air in
the piping.
•Use suitable pipe hangers or floor stands to support the
weight of all water and gas piping.
•The DynaMax 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.)
•Strainers are recommended to be installed into the
system to prevent foreign objects from entering the heat
exchanger.
4.1 FREEZE PROTECTION OUTDOOR
INSTALLATION
•Appliance installations are not recommended outdoors
or in areas where danger of freezing exists unless
precautions are taken. Maintaining a mixture of 70%
water and 30% propylene glycol is the preferred method
of freeze protection in hydronic systems. DO NOT
exceed a mixture of 50/50. This mixture will protect the
appliance to approximately -35ºF (-37ºC).
•For outdoor installations a snow screen should be
installed to prevent snow and ice accumulation around
the appliance. Regular inspections should be made to
ensure that air inlet and vent are free of snow and ice.
Always consider the use of a shelter such as a garden
shed in lieu of direct exposure of the appliance to the
elements. The additional protection afforded by the
shelter will help to minimize nuisance problems with
electrical connections and will allow easier servicing of
the appliance under severe weather conditions.