Camus Hydronics Valiant-FT II Series Manual

99-0419 Rev.00
Valiant-FT® Series II
Installation and Service Manual
Gas Fired Commercial Condensing Stainless Steel Boilers
Hydronic Heating Models VA400 thru VA850
WARNING
If the information in these instructions is not followed exactly, a fire or explosion may result causing property damage, personal injury
or death.
WHAT TO DO IF YOU SMELL GAS
•Do not try to light any appliance,
•Do not touch any electrical switch; do not use any phone in your building,
•Immediately call your gas supplier from a neighbour’s phone. Follow the gas supplier’s instructions,
•If you cannot reach your gas supplier, call the fire department.
A Qualified installer, service agency or the gas supplier must perform installation and service.
WARNING
Do not store or use gasoline or other flammable vapours and liquids in the vicinity of this or any other appliance.
TO THE INSTALLER: 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.
H

99-0419 Rev.00

99-0419 Rev.00
Table of Contents
PART 1 GENERAL INFORMATION ..................................................................................................................................................1
1.1 INTRODUCTION ......................................................................................................................................................................1
1.2 CODES.....................................................................................................................................................................................1
PART 2 INSTALLATION....................................................................................................................................................................1
2.1 UNIT LOCATION......................................................................................................................................................................1
2.1.1 Overall Dimensions..........................................................................................................................................................2
2.1.2 Service Clearances*.........................................................................................................................................................2
2.2 COMBUSTION AIR AND VENTILATION..................................................................................................................................2
2.2.1 Venting Materials .............................................................................................................................................................4
2.2.2 Vertically Direct Vented....................................................................................................................................................4
2.2.3 Horizontally Direct Vented................................................................................................................................................5
2.2.4 Sidewall Clearance Specifications ...................................................................................................................................8
2.2.5 Removal of existing appliance (if applicable) ...................................................................................................................9
2.3 GAS CONNECTION.................................................................................................................................................................9
2.3.1 Gas Piping ...............................................................................................................................................................................9
2.3.2 Gas Supply Pressure...............................................................................................................................................................9
2.3.3 Gas Regulators and Lockup Pressure...................................................................................................................................10
2.3.4 Connecting the Gas Supply Piping ........................................................................................................................................10
2.4 WATER CONNECTION..........................................................................................................................................................10
2.4.1 Freeze Protection...................................................................................................................................................................10
2.4.2 Connecting to the Valiant FT..................................................................................................................................................11
2.4.3 Low Water Cut-off (LWCO)....................................................................................................................................................11
2.4.4 High Limit...............................................................................................................................................................................11
2.4.5 Minimum Pipe Size Requirements.........................................................................................................................................11
2.4.6 Flow and pressure drop at a given ∆T ...................................................................................................................................12
2.5 ELECTRICAL CONNECTIONS ..............................................................................................................................................12
2.5.1 Minimum Power Requirements..............................................................................................................................................12
PART 3 COMBUSTION COMPONENTS.........................................................................................................................................12
3.1 AIR/ GAS RATIO CONTROL VALVE .....................................................................................................................................12
3.2 GAS PRESSURE SWITCHES (Optional)...............................................................................................................................13
3.2.1 Low Gas Pressure .................................................................................................................................................................13
3.2.2 High Gas Pressure.................................................................................................................................................................13
3.3 AIR PRESSURE SWITCHES ................................................................................................................................................13
3.3.1 Blocked Flue Switch...............................................................................................................................................................13
3.3.2 Low Air Switch .......................................................................................................................................................................13
3.4 COMBUSTION AIR BLOWER................................................................................................................................................13
3.5 BURNER.................................................................................................................................................................................14
3.6 SPARK IGNITER....................................................................................................................................................................14
3.7 FLAME SENSOR....................................................................................................................................................................14
PART 4 OPERATION & START UP ................................................................................................................................................14
4.1 SEQUENCE OF OPERATION................................................................................................................................................14
HEAT TRANSFER PROCESS .......................................................................................................................................................15
4.2 FIELD START-UP PROCEDURE...........................................................................................................................................15
4.3 NATURAL GAS COMBUSTION VALUES ..............................................................................................................................16
4.4 LP GAS COMBUSTION VALUES...........................................................................................................................................16

99-0419 Rev.00
4.5 CONVERSION PROCEDURE FOR NG TO LP GAS.............................................................................................................16
4.6 HIGH ALTITUDE.....................................................................................................................................................................17
PART 5 CONTROLS........................................................................................................................................................................18
5.1 VALIANT FT CONTROL.........................................................................................................................................................18
5.1.1 Levels of Access....................................................................................................................................................................18
5.1.2 Control Board Connections....................................................................................................................................................18
5.2 HMI TOUCHSCREEN INTERFACE .......................................................................................................................................18
PART 6 CONTROL SETTINGS.......................................................................................................................................................19
6.1.1 System Identification & Access..............................................................................................................................................29
6.1.2 Pump Configuration ...............................................................................................................................................................29
6.1.3 Statistics Configuration..........................................................................................................................................................30
6.1.4 Burner Control Timing and Rates...........................................................................................................................................30
6.1.5 Sensor Configuration.............................................................................................................................................................30
6.2 Lead Lag Setup.......................................................................................................................................................................31
6.3 SAFETY AND SYSTEM FUNCTIONS....................................................................................................................................31
6.3.1 On-board Physical Lockout Reset..........................................................................................................................................31
6.3.2 Flame Detection.....................................................................................................................................................................31
PART 7 ERROR TABLE..................................................................................................................................................................32
PART 8 MAINTENANCE .................................................................................................................................................................33
8.1 EXAMINE THE VENTING SYSTEM.......................................................................................................................................33
8.2 CLEANING BOILER HEAT EXCHANGER .............................................................................................................................33
8.3 CONDENSATE TREATMENT................................................................................................................................................33
8.4 IGNITER AND FLAME SENSOR ELECTRODES...................................................................................................................34
8.5 BURNER MAINTENANCE......................................................................................................................................................34
8.5.1 Burner Removal and Cleaning...............................................................................................................................................34
8.6 COMBUSTION AND VENTILATION AIR................................................................................................................................35
PART 9 PIPING DIAGRAMS ...........................................................................................................................................................36
PART 10 PARTS LIST...................................................................................................................................................................39
PART 11 TUBING DIAGRAM........................................................................................................................................................56
PART 12 WIRING DIAGRAM........................................................................................................................................................57

1
SPECIAL INSTRUCTIONS TO THE
OWNER:
This manual contains 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.
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 has been under
water. The possible damage to a flooded appliance can
be extensive and present numerous safety hazards.
Immediately call a qualified service technician to inspect
the boiler and to replace any part of the control system
and any gas control which has been under water.
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.
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 CO2, CO, and draft
gauge, to set the appliance according to Camus®
Hydronics’ recommendations, prior to commissioning.
CHECK 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.
NOTE
RETAIN THIS MANUAL FOR FUTURE REFERENCE
PART 1 GENERAL INFORMATION
1.1 INTRODUCTION
The Valiant-FT Series 2 boilers are condensing, forced draft
appliances utilizing a premix power burner based on a push
through design which offers several venting options. Heat
output is controlled by the venturi and zero governor gas
valve, which work together to provide seamless modulation.
It is designed for use with a fully pumped and pressurized
water system. The turndown ratio for this appliance is up to
10:1. This results in the appliance automatically modulating
to provide heat outputs from 100% down to approximately
10% of rated input.
1.2 CODES
The equipment shall be installed in accordance with those
installation regulations enforced in the local area where the
installation is to be made. In the absence of such
requirements, the installation shall conform to the latest
edition of the National Fuel Gas Code, ANSI Z223.1 and/or
CAN/CGAB149 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 the American Society of
Mechanical Engineers Safety Code for Controls and Safety
Devices for Automatically Fired Boiler, ASME CSD-1. All
boilers conform to the latest edition of the ASME Boiler and
Pressure Vessel Code, Section II & IV. 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 & ANSI Z21.10.
PART 2 INSTALLATION
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.
2.1 UNIT LOCATION
Install this appliance in a clean, dry location.
Site preparation for the Valiant-FT should be carried out by
paying attention to the dimensions of the model size and its
overall clearances.
Figure 1: Floor Mounted Valiant-FT

2
2.1.1 Overall Dimensions
Table 1: Floor Mounted Valiant-FT Overall Dimensions
Model
Width (in)
Depth (in)
Height (in)
400
22 1/8
32 7/8
57 1/2
500
22 1/8
32 7/8
57 1/2
600
25 3/8
33 1/4
57 1/2
725
25 3/8
35
57 1/2
850
25 3/8
35
57 1/2
The clearances below must be added to your specific
model’s overall dimensions to calculate the total space
required for the installation of your appliance.
2.1.2 Service Clearances*
Table 2: Valiant-FT Service Clearances on all sides
Model
Top
Right Side
Left Side
Back
Front
400
18”
2”
3”
1”
24”
500
18”
2”
3”
1”
24”
600
18”
2”
3”
1”
24”
725
18”
2”
3”
1”
24”
850
18”
2”
3”
1”
24”
* Minimum clearance of 10” recommended on right hand side of
appliance for ease of combustion air filter replacement.
This appliance is suitable for alcove installation. Clearance
to combustibles is zero on all sides.
THIS BOILER MUST NEVER BE INSTALLED ON
CARPETING.
Figure 2: Valiant FT Series II appliance gas train
components accessible from the top panel
The Valiant FT Series II does not necessarily require
access through the sides and can be placed adjacent to
each other with minimum clearances. However, it is highly
recommended to allow for at least a minimum clearance of
10” on the appliance’s right-hand side. This allows for easy
access to maintain the combustion air filter. Access panels
from the sides of the unit are also provided to make the
appliance more accessible for easier maintenance. This
provides larger points of access for greater ease of
serviceability.
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. Under no circumstances is the
manufacturer to be held responsible for water damage in
connection with this unit or any of its components.
Do not locate this appliance in an area where it will be
subject to freezing unless precautions are taken. Due to low
jacket losses from the appliance, radiant losses from the
boiler are minimal and should not be relied on to keep the
appliance room warm. Supplemental heat may be required
in the boiler room to maintain ambient temperature at
acceptable levels.
Do not locate this appliance where it may be exposed to a
corrosive atmosphere.
Low Water Cut-Off requirement: 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 some distance above the heat exchanger
inlet/outlet connections. A port for a LWCO probe is
provided on the outlet piping, inside the jacket, of this
appliance. Some local codes require the installation of a low
water cut-off on all systems.
2.2 COMBUSTION AIR AND VENTILATION
DANGER
It is extremely important to follow these venting
instructions carefully. Failure to do so can cause severe
personal injury, death or substantial property damage.
A continuous supply of combustion air must be
provided at all times for the safe operation of this
appliance!
The Valiant-FT is a Category II and Category IV appliance.
A Category IV appliance is individually vented through a
dedicated vent. The Combustion air may be drawn from the
room. However, in the case the boiler is direct vented, the
combustion air must also be piped directly to the outdoors.
The Valiant FT boiler utilizes Category IV Venting, capable
of venting up to a combined 200’ equivalent length of vent
(maximum 100’ of exhaust and a 100’ of combustion air
intake vent). This appliance may only use approved venting
(see table below).
For direct vent applications, the wall thickness must be
between 0.5” – 12” (1.2 cm to 30 cm).
Some of the different venting configurations include:

3
Figure 3: Indoors Combustion Air and vertically
exhausted to the outdoors
Figure 4: Combustion Air and Exhaust gasses both
vertically vented to the outdoors
Figure 5: Indoors Combustion Air and horizontally
exhausted to the outdoors
Figure 6: Combustion Air and Exhaust gasses both
horizontally vented to the outdoors

4
2.2.1 Venting Materials
Table 3: Venting Materials for Valiant-FT Series II
Material
Maximum Flue Temp (°F)
PVC
149
CPV
194
PPE
230
AL29-4C
300+, limited only by rating of seals
316L Stainless Steel
300+, limited only by rating of seals
*Use PVC, CPVC (only ULC-S636 approved plastic
material must be used in Canada) or AL29-4C gas vent
pipes listed for use with Category IV appliances. All venting
installations shall be in accordance with “Venting of
Equipment,” of the National Fuel Gas Code, ANSI
Z223.1/NFPA 54, or “Venting Systems and Air Supply for
Appliances,” of the Natural Gas and Propane Installation
Code, CAN/ CSA B149.1, or 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. Use of cellular core PVC (ASTM F891),
cellular core CPVC, or Radel® (polyphenolsulfone) in
venting systems is prohibited. Covering non-metallic vent
pipe and fittings with thermal insulation shall be prohibited.
The horizontal venting run should be sloping upwards not
less than ¼ in/ft (21 mm/m) from the boiler to the vent
terminal. The venting system should be installed to prevent
accumulation of condensate and where necessary have the
means provided for drainage of the condensate.
Failure to install an approved vent on the unit can result in
severe property damage, injury or death!
In the case, the combustion air is drawn from outdoors, i.e.
direct vented, there are two configurations.
1.) Vertically Direct Vented
2.) Horizontally Direct Vented
2.2.2 Vertically Direct Vented
Location of Vent Termination
1. Total length of piping for venting must not exceed
limits stated in Table 4.
Table 4: Valiant-FT Series II Vent Length Limits
Models
Air Intake
Exhaust
VA400 –VA850
Up to 120’
Up to 120’
Figure 7: Vertical Vent Termination
2. Vent piping must terminate in a 45° elbow if plastic
piping is used or an approved vent cap if using
metal venting.
Figure 8: Vertically Direct Vented Clearances
3. Vent outlet must be at least 1 foot away and 1 foot
above from the air inlet opening which must
terminate in a double 90° elbow facing
downwards.

5
Figure 9: Vertical Vent Clearance above Vent
Penetration
4. 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.
Figure 10: Vertical Vent Exhaust and Air Intake
Clearance
5. 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.
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. 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.
8. Perform regularly scheduled inspections to ensure
that the vent terminal is unobstructed.
9. Termination MUST NOT terminate below a forced
air inlet at any distance.
2.2.3 Horizontally Direct Vented
Location of Vent Termination
1. Total length of piping for venting must not exceed
limits stated in Table 4.
Figure 11: Horizontally Direct Vented Clearances
2. Bottom of vent terminal shall be located at least 36
inches (0.90m) above ground or 12 inches above
normal snow levels. In all cases the appliance
shall be installed in accordance with local codes.

6
Figure 12: Horizontal Vent Exhaust and Air Intake
Clearance
3. Valiant FT can vent up to 100 equivalent feet.
Elbows can range from 3 to 5 feet in equivalent
length depending on the centerline radius.
Figure 13: Horizontal Vent Exhaust and Air Intake
Configurations and Clearance
4. Vent outlet shall terminate at least 12” (0.30m)
away from any forced air inlet. The combustion air
intake should never terminate above the vent
outlet.