Slant/Fin VHG-100-CH Manual

RESIDENTIAL BOILER MODELS
VGH-80-CH / VGH-100-CH / VGH-120-CH /
VGH-150-CH / VGH-180-CH
VGH-90-CO / VGH-150-CO / VGH-200-CO
HIGH EFFICIENCY CONDENSING GAS BOILER
QUICK CONTENTS
FULL TABLE OFCONTENTS................................ 3
1.0 SAFETY GUIDELINES..........................................8
2.0 INTRODUCTION.................................................13
3.0 TECHNICALDATA........................................................16
4.0 BOILER DIMENSIONS .......................................... 26
5.0 ACCESSORIESANDUNPACKING....................... 28
6.0 INSTALLATION LOCATION................................... 29
7.0 CONNECTIONS ..................................................... 32
8.0 CIRCULATORCHARACTERISTICS...................... 47
9.0 FLUE GASANDAIRSUPPLYSYSTEM................52
10.0 ELECTRICALINSTALLATION............................... 76
11.0 USING THEDISPLAY................................................88
12.0 TEMPERATUREPROTECTION.........................113
13.0 ERROR INFORMATION ...................................... 113
14.0 CASCADING SYSTEMSETUP..........................119
15.0 SYSTEMTEST .................................................125
16.0 COMMISSIONINGTHE BOILER........................126
17.0 ADJUSTINGANDSETTINGTHEBOILER.........129
18.0 INSPECTION,MAINTENANCEANDSERVICE..136
29.0 USER INSTRUCTIONS..................................... 148
20.0 INSTALLATIONEXAMPLES.............................. 148
21.0 SPARE PARTS VGH-xx-CH........................................152
22.0 SPARE PARTS VGH-xx-CO........................................157
HeatingContractor
Boiler Model Number
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INSTALLATION AND SERVICE MANUAL
- Do not store or use gasoline or
other flammable vapors and
liquids in the vicinity of this or
any other appliance.
California Proposition 65 Warning: This product contains chemicals known to the State
ofCalifornia to cause cancer, birth defects, or other reproductive harm.
- WHAT TODOIFYOUSMELLGAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use
any phone in your building.
• Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
instructions.
• If you cannot reach your gas supplier, call the
fire department.
- Installation and service must be performed by a
qualified installer, service agency or the gas
supplier.
WARNING: Iftheinformationin
thismanualisnotfollowed
exactly,afireorexplosionmay
resultcausing property damage,
personal injury or loss of life.
This manual must be
left with owner and
must be hung on or
adjacent
to the boiler
for reference.

E93.1901EN032 Installation and Service Manual SlantFin VGH-CH / CO 3
TABLE OF CONTENTS
1SAFETY GUIDELINES ................................................................................................................................8
2INTRODUCTION........................................................................................................................................13
TERMS AND ABBREVIATIONS ............................................................................................................. 13
CODES,STANDARDS AND REGULATIONS............................................................................................ 14
MAINTENANCE AND INSPECTION........................................................................................................ 14
FOR INSTALLATIONS IN THE COMMONWEALTH OF MASSACHUSETTS.................................................... 15
3TECHNICAL DATA VGH RESIDENTIAL BOILERS.................................................................................16
Functional introduction.......................................................................................................16
LOCATION OF VERSION NUMBERS...................................................................................................... 17
TECHNICAL SPECIFICATIONS DATASHEETS......................................................................................... 18
Technical specifications VGH-80-CH / VGH-90-CO / VGH-100-CH.................................18
Technical specifications VGH-120-CH / VGH-150-CO / VGH-150-CH.............................20
Technical specifications VGH-180-CH / VGH-200-CO......................................................22
HIGH ALTITUDE OPERATION............................................................................................................... 24
DHW SPECIFICATIONS VGH-CO SERIES........................................................................................... 24
HEAT EXCHANGER INFORMATION....................................................................................................... 24
SPECIFICATIONS INPUT,OUTPUT,EFFICIENCY (AHRI) ........................................................................ 25
4BOILER DIMENSIONS..............................................................................................................................26
VGH-80-CH /VGH-100-CH /VGH-120-CH /VGH-150-CH /VGH-180-CH................................... 26
VGH-90-CO /VGH-150-CO /VGH-200-CO................................................................................... 27
5ACCESSORIES AND UNPACKING..........................................................................................................28
OPTIONAL ACCESSORIES.................................................................................................................. 28
SUPPLIED WITH THE BOILER.............................................................................................................. 28
6INSTALLATION LOCATION OF THE VGH..............................................................................................29
GENERAL......................................................................................................................................... 29
BOILER INSTALLATION LOCATION REQUIREMENTS.............................................................................. 29
INSTALLATION CLEARANCES ............................................................................................................. 30
MOUNTING THE BOILER..................................................................................................................... 31
7CONNECTIONS.........................................................................................................................................32
BOILER CONNECTIONS VGH-CH TYPES ............................................................................................ 32
BOILER CONNECTIONS VGH-CO TYPES ............................................................................................ 32
GAS PIPE CONNECTION..................................................................................................................... 33
Gas line connection ...........................................................................................................33
CONDENSATE DRAIN CONNECTION .................................................................................................... 35
FLOW AND RETURN CONNECTIONS .................................................................................................... 35
EXPANSION VESSEL.......................................................................................................................... 36
PRESSURE RELIEF VALVE.................................................................................................................. 36
PRIMARY/SECONDARY PIPING .......................................................................................................... 36
CIRCULATOR FUNCTIONALITY............................................................................................................ 37
FROST PROTECTION......................................................................................................................... 38
INSTALLING A STRAINER AND/OR DIRT SEPARATOR ............................................................................. 38
SCALDING DANGER PROTECTION....................................................................................................... 39
SUPPLY AND RETURN CONNECTIONS AND PRESSURE RELIEF VALVE.................................................... 39
TEMPERATURE LIMITING DEVICE (DHW)............................................................................................ 39
DRAIN VALVES (DHW)...................................................................................................................... 39
SHUTOFF VALVES (DHW)................................................................................................................. 39
CENTRAL HEATING WATER QUALITY.................................................................................................. 40
DOMESTIC WATER QUALITY ............................................................................................................. 41
USE OF GLYCOL............................................................................................................................... 41
CHEMICAL WATER TREATMENT.......................................................................................................... 41
PLASTIC PIPING IN THE HEATING SYSTEM.......................................................................................... 42
UNDERFLOOR HEATING..................................................................................................................... 42
FLUSH THE SYSTEM WITH FRESH WATER............................................................................................ 43
AUTOMATIC AIR PURGING.................................................................................................................. 43
MANUAL DE-AIRING THE HEAT EXCHANGER........................................................................................ 44
AUTOMATIC FEED VALVE.................................................................................................................. 44
WATER PRESSURE........................................................................................................................... 44

4 E93.1901EN032 Installation and Service Manual SlantFin VGH-CH / CO
INSTALLATION EXAMPLES.................................................................................................................. 45
Examples of a normal single boiler heating circuit with low loss header (preferable).......45
Example of a multiple boiler heating circuit with low loss header......................................46
8CIRCULATOR CHARACTERISTICS........................................................................................................47
PRESSURE DROP AND FLOW GRAPHS ................................................................................................ 47
Boiler resistance graph VGH-80-CH / VGH-90-CO...........................................................47
Boiler resistance graph VGH-100-CH................................................................................47
Boiler resistance graph VGH-120-CH / VGH-150-CO.......................................................48
Boiler resistance VGH-150-CH..........................................................................................48
Boiler resistance graph VGH-180-CH / VGH-200-CO.......................................................49
Graph showing the Available Circulation pump head........................................................49
MINIMUM REQUIRED CIRCULATOR HEAD............................................................................................. 50
MODULATING CIRCULATOR FOR CH DEMAND...................................................................................... 50
MODULATING CIRCULATOR MODES .................................................................................................... 50
CIRCULATORS:MAXIMUM ELECTRICAL POWER ................................................................................... 51
Circulator power cord positioning ......................................................................................51
9FLUE GAS AND AIR SUPPLY SYSTEM..................................................................................................52
GENERAL VENTING........................................................................................................................... 52
Vent sizing .........................................................................................................................52
Vent and air inlet resistance table......................................................................................53
VENT AND AIR INTAKE PIPE MATERIAL ................................................................................................ 53
Approved manufacturers....................................................................................................54
PVC /CPVC................................................................................................................................... 54
Instructions for working with cementing PVC/ CPVC pipe connections............................55
POLYPROPYLENE............................................................................................................................. 55
REDUCER ........................................................................................................................................ 56
Flexible polypropylene.......................................................................................................56
STAINLESS STEEL VENT.................................................................................................................... 57
SEALED COMBUSTION AIR SUPPLY.................................................................................................... 57
Combustion air quality .......................................................................................................57
Air supply through humid areas.........................................................................................57
Air intake/vent connections................................................................................................58
Air inlet pipe materials........................................................................................................58
ROOM AIR........................................................................................................................................ 59
Air contamination ...............................................................................................................61
PROPER VENT INSTALLATION AND TYPE OF GAS VENT OR VENT CONNECTOR........................................ 63
INSTALL VENT AND COMBUSTION AIR PIPING....................................................................................... 63
REQUIREMENTS FOR INSTALLATION IN CANADA.................................................................................. 64
DIRECT VENTING OPTIONS................................................................................................................ 64
WALL (HORIZONTAL)DIRECT VENTING............................................................................................... 67
Vent/air termination - wall ..................................................................................................67
Determine Location............................................................................................................67
ROOF (VERTICAL)DIRECT VENTING ................................................................................................... 72
Vent/air termination – vertical ............................................................................................72
Determine location.............................................................................................................72
COMMON VENTING ........................................................................................................................... 75
EXISTING COMMON VENTING GUIDELINES......................................................................................... 75
10 ELECTRICAL INSTALLATION.................................................................................................................76
GENERAL......................................................................................................................................... 76
CONNECTION MAINS SUPPLY............................................................................................................. 76
ELECTRICAL CONNECTIONS VGH-CH/CO BOILERS............................................................................ 76
Explanation of the low voltage connections VGH-CH boilers............................................77
Explanation of the high voltage connections VGH-CH boilers ..........................................78
Explanation of the low voltage connections VGH-CO boilers............................................79
Explanation of the high voltage connections VGH-CO boilers..........................................80
Ladder/Logic Diagram VGH-CH/CO BOILERS.................................................................81
Electrical schematic VGH-CH boilers ................................................................................82
Electrical schematic VGH-CO boilers................................................................................84
SENSOR AVAILABILITY....................................................................................................................... 86
Sensor availability VGH-CH boilers...................................................................................86
Sensor availability VGH-CO boilers...................................................................................86
NTC SENSOR CURVE........................................................................................................................ 86

E93.1901EN032 Installation and Service Manual SlantFin VGH-CH / CO 5
PROGRAMMABLE IN-AND OUTPUTS ................................................................................................... 87
11 USING THE DISPLAY ...............................................................................................................................88
DISPLAY AND BUTTONS..................................................................................................................... 88
Display icons......................................................................................................................89
SCREENS AND SETTINGS .................................................................................................................. 89
De-aeration Sequence.......................................................................................................89
CONTROL PANEL MENU STRUCTURE.................................................................................................. 90
Set Actual setpoint/DHW setpoint directly via the Status overview...................................91
Entering the menu..............................................................................................................91
Protected menu items........................................................................................................92
Language settings..............................................................................................................92
BOILER HISTORY .............................................................................................................................. 93
ERROR LOGGING.............................................................................................................................. 93
SERVICE REMINDER.......................................................................................................................... 94
Service overdue logging ....................................................................................................94
Reset the service reminder................................................................................................94
GENERAL......................................................................................................................................... 95
Circulator start exercise every 24 hours ............................................................................95
Frost protection..................................................................................................................95
Flue temperature protection...............................................................................................95
Appliance selection............................................................................................................96
IGNITION CYCLE ............................................................................................................................... 96
Flame detection .................................................................................................................96
Flame recovery ..................................................................................................................97
CONTROL FUNCTIONS CENTRAL HEATING.......................................................................................... 97
Room thermostat only; CH mode 0 (Default setting).........................................................97
CH with an outdoor temperature reset and thermostat; CH mode 1.................................98
CH with constant circulation system outdoor reset; CH mode 2 .....................................100
CH with constant circulation and permanent heat demand; CH mode 3.........................101
Central Heating with analog input control of setpoint; CH mode 4..................................101
CH with analog input control of power output; CH mode 5..............................................102
CONTROL FUNCTIONS DOMESTIC HOT WATER................................................................................ 103
No Domestic Hot Water; DHW mode 0 ...........................................................................103
High pressure drop indirect tank DHW mode 1 and 2 (VGH-CH boilers only)................103
DHW Storage with sensor; DHW mode 1........................................................................103
DHW Storage with thermostat; DHW mode 2..................................................................104
Instantaneous water heating with plate heat exchanger; DHW mode 5..........................105
Anti-legionella protection..................................................................................................105
MENU STRUCTURE DISPLAY............................................................................................................ 106
12 TEMPERATURE PROTECTION .............................................................................................................113
13 ERROR INFORMATION..........................................................................................................................113
BOILER HISTORY ............................................................................................................................ 113
LOCKOUT CODES............................................................................................................................ 114
BLOCKING CODES .......................................................................................................................... 116
WARNINGS .................................................................................................................................... 118
14 CASCADING............................................................................................................................................119
SYSTEM SETUP.............................................................................................................................. 119
BOILER CASCADE COMMUNICATION SETUP....................................................................................... 119
Setting the boiler address................................................................................................120
E2prom address selection through e2prom setting.........................................................121
Cascade – Heating only (CH) Managing boiler ...............................................................121
Cascade – Domestic Hot Water Settings ........................................................................121
Cascade – DHW priority ..................................................................................................122
Cascade – Start/stop sequence.......................................................................................122
Cascade – Power balance mode.....................................................................................122
CASCADE –BOILER ROTATION........................................................................................................ 122
Next depending to start selection ....................................................................................123
CASCADE ERROR HANDLING .......................................................................................................... 123
Cascade Frost protection.................................................................................................123
Emergency mode.............................................................................................................124
Managing boiler error.......................................................................................................124

6 E93.1901EN032 Installation and Service Manual SlantFin VGH-CH / CO
15 SYSTEM TEST.........................................................................................................................................125
16 COMMISSIONING THE BOILER.............................................................................................................126
FIRST:FLUSHING THE BOILER WITH WATER ...................................................................................... 126
SECOND:FILLING &VENTING THE BOILER AND THE SYSTEM .............................................................. 126
THIRD:CHECK THE WATER FLOW..................................................................................................... 126
MOUNTING THE CONDENSATE TRAP................................................................................................ 127
CHECKING GAS PRESSURE.............................................................................................................. 127
FIRING FOR THE FIRST TIME ............................................................................................................ 128
17 ADJUSTING AND SETTING THE BOILER ............................................................................................129
INTRODUCTION............................................................................................................................... 129
Combustion table.............................................................................................................129
Setting screws gas valve: drawings.................................................................................130
CO2/O2ADJUSTMENT PROCEDURES.............................................................................................. 131
VENTURI ADJUSTEMENT.................................................................................................................. 131
CONVERSION FROM NATURAL GAS TO PROPANE............................................................................... 132
START UP CHECKLIST .................................................................................................................... 134
18 INSPECTION, MAINTENANCE AND SERVICE.....................................................................................136
GENERAL....................................................................................................................................... 136
SAFETY INSTRUCTIONS CRYSTALLINE SILICA................................................................................... 136
INSPECTION,MAINTENANCE AND SERVICE TASKS ............................................................................. 138
REPLACING HEATEXCHANGER PARTS.............................................................................................. 142
Replacement of the burner door gasket ..........................................................................142
Fiber braid replacement...................................................................................................142
Replacement of the burner door insulation......................................................................143
Replacement of the Rear wall insulation disk..................................................................145
Replacement Ignition / ionization electrode.....................................................................145
CLEANING THE BRAZED PLATE HEAT EXCHANGER ........................................................................... 146
MAINTENANCE CHECKLIST.............................................................................................................. 147
19 USER INSTRUCTIONS ...........................................................................................................................148
20 INSTALLATION EXAMPLES ..................................................................................................................148
21 SPARE PARTS VGH-xx-CH ...................................................................................................................152
SPARE PART LIST VGH-XX-CH....................................................................................................... 154
22 SPARE PARTS VGH-CO ........................................................................................................................157
SPARE PART LIST VGH-XX-CO....................................................................................................... 159

E93.1901EN032 Installation and Service Manual SlantFin VGH-CH / CO 7
IMPORTANT
READ ALL OF
THE FOLLOWING WARNINGS AND STATEMENTS BEFORE READING
THE INSTALLATION INSTRUCTIONS
Danger Sign:
indicates the presence of an imminently hazardous situation that will cause
death, serious personal injury or substantial property damage.
Warning Sign:
indicates the presence of a hazardous situation which can cause death,
serious personal injury or substantial property damage.
Caution Sign plus Safety Alert Symbol:
indicates a hazardous situation which will or can
cause minor or moderate personal injury or property damage.
Caution Sign plus a lightning bolt indicates the risk of electric shock and the potential of
hazards due to electric shock.
Notice Sign:
indicates special instructions on installation, operation or maintenance that are
important but not related to personal injury or property damage.
This Boiler must be installed by a licensed and trained Heating Technician or the Warranty
is void. Failure to properly install this unit may result in property damage, serious injury to
occupants, or possibly death.
DANGER
WARNING
CAUTION
CAUTION
NOTICE
WARNING

8 E93.1901EN032 Installation and Service Manual SlantFin VGH-CH / CO
1 SAFETY GUIDELINES

E93.1901EN032 Installation and Service Manual SlantFin VGH-CH / CO 9
CONSIGNES DE SÉCURITÉ.

10 E93.1901EN032 Installation and Service Manual SlantFin VGH-CH / CO
This boiler is equipped with a pressure switch. I
n the event of a blocked vent the boiler will
lockout. No attempt by the user/owner should be made to put the boiler back into
operation.
A qualified service technician must be notified of the issue. The boiler should
only be reset by
a qualified service technician after they have diagnosed and corrected the issued that caused
the safety lockout of the boiler.
•Should overheating occur or the gas supply fail to shut off, do not turn off or disconnect the
electrical supply to the circulator. Instead, shut off the gas supply at a location external to
the appliance.
•Do not use this boiler if any part has been under water. 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.
•Scalding
Water temperatures over 125 ºF (52 ºC) can cause severe burns instantly, or death from
scalds. Children, the disabled and the elderly are at the highest risk of being scalded.
Feel water before bathing or showering.
Read this manual entirely before setting domestic hot water setpoint(s).
We highly recommend the installation of a carbon monoxide (CO) detector in the boiler room
for all installations.
•WARNING: There are no user serviceable parts on this boiler. Warranty does not cover
defects caused by attempts to service this boiler by someone other than a qualified gas
service technician. These attempts could cause property damage, personal injury or loss
of life.
•WARNING: Crystalline Silica - Certain components in the combustion chamber may
contain this potential carcinogen. Improper installation, adjustment, alteration, service or
maintenance can cause property damage, serious injury (exposure to hazardous
materials) or death. Refer to Section 18.2 for information on handling instructions and
recommended personal protective equipment. Installation and service must be
performed by a qualified installer, service agency or the gas supplier (who must read and
follow the supplied instructions before installing, servicing, or removing this boiler. This
boiler contains materials that have been identified as carcinogenic, or possibly
carcinogenic, to humans).
•WARNING: There are no user serviceable parts on this boiler. Warranty does not cover
defects caused by attempts to service this boiler by someone other than a qualified gas
service technician. These attempts could cause property damage, personal injury or loss
of life.
•a water heater that will be used to supply potable water shall not be connected to any
heating system or component(s) previously used with a non-potable water heating
appliance.
WARNING: Improper installation, adjustment,
alteration, service or maintenance can cause
property damage, personal injury (exposure to
hazardous materials) * or loss of life.
Installation and service must be performed by
a qualified installer, service agency or the gas
supplier (who must read and follow the
supplied instructions before installing,
servicing, or removing this boiler. This boiler
contains materials that have been identified as
carcinogenic, or possibly carcinogenic, to
humans)
AVERTISSEMENT: Une installation, un réglage, une
modification, une réparation ou un entretien non
conforme aux normes peut entraîner des dommages
matériels, des blessures (exposition à des matières
dangereuses) ou la mort. L'installation et l'entretien
doivent être effectués par un installateur ou un service
d'entretien qualifié ou le fournisseur de gaz (qui doivent
avoir lu les instructions fournies avant de faire
l'installation, l'entretien ou l'enlèvement de la chaudière
et les respecter. Cette chaudière contient des matériaux
qui ont été identifiés comme étant cancérogènes ou
pouvant l'être).
CAUTION
DANGER
NOTICE
WARNING
Avertissement
WARNING

E93.1901EN032 Installation and Service Manual SlantFin VGH-CH / CO 11
Avertissement
(pour installateurs francophones)
INTRODUCTION
Ce manuel est écrit pour l’utilisateur.
Slant/Fin n'est pas responsable de tout dommage causé par ne pas suivre correctement de ces instructions. Pour
service et réparation, utiliser seulement pièces de rechange de Slant/Fin. Tout documentation produit par le
fabricant est sous réserve de la loi sur le droit d'auteur. Ce manuel est sujet à changement sans préavis.
Explications:
VGH = Chaudière à condensation
DHW = Eau Chaude Sanitaire (ECS)
CH = Chauffage central (pour objectif chauffage et/ ou eau chaude indirect)
BCU = commande (burner control unit)
PB = écran (Pixel Button)
CONSIGNES DE SÉCURITÉ
POUR VOTRE SÉCURITÉ LISEZ AVANT DE METTRE EN MARCHE
« A. Cet appareil ne comporte pas de veilleuse. Il est muni d'un dispositif d'allumage qui allume automatique-ment
le brûleur. Ne tentez pas d'allumer le brûleur manuellement.»
« B. AVANT DE FAIRE FONCTIONNER, reniflez tout autour de l'appareil pour déceler une odeur de gaz. Reni-
flez près du plancher, car certains gaz sont plus lourds que l'air et peuvent s'accumuler au niveau du sol. »
QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ :
•Ne pas tenter d'allumer d'appareil.
•Ne touchez à aucun interrupteur; ne pas vous servir des téléphones se trouvant dans le bâtiment.
•Appelez immédiatement votre fournisseur de gaz depuis un voisin. Suivez les instructions du fournisseur.
•Si vous ne pouvez rejoindre le fournisseur, appelez le service des incendies.
— Ne pas entreposer ni utiliser d'essence ou ni d'autres vapeurs ou liquides
inflammables à proximité de cet appareil ou de tout autre appareil.
— QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ :
•Ne pas tenter d’allumer d’appareils.
•Ne touchez à aucun interrupteur. Ne pas vous servir des téléphones dans le bâtiment
où vous vous trouvez.
•Appelez immédiatement votre fournisseur de gaz depuis un voisin. Suivez les
instructions du fournisseur.
•Si vous ne pouvez rejoindre le fournisseur de gaz, appelez le service des incendies.
L'installation et l'entretien doivent être assurés par un installateur ou un service
d'entretien qualifié ou par le fournisseur de gaz.
AVERTISSEMENT. Assurez-vous de bien suivre les instructions données dans
cette notice pour réduire au minimum le risque d'incendie ou d'explosion ou pour
éviter tout dommage matériel, toute blessure ou la mort.
AVERTISSEMENT. Assurez-vous de bien suivre les instructions données dans cette notice pour réduire au
minimum le risque d'incendie ou d'explosion ou pour éviter tout dommage matériel, toute blessure ou la mort.

12 E93.1901EN032 Installation and Service Manual SlantFin VGH-CH / CO
« C. Ne poussez ou tournez la manette d'admission du gaz qu'à la main ; ne jamais utiliser d'outil. Si la manette
reste coincée, ne pas tenter de la réparer ; appelez un technicien qualifié. Le fait de forcer la manette ou de la
réparer peut déclencher une explosion ou un incendie. »
« D. N'utilisez pas cet appareil s'il a été plongé dans l'eau, même partiellement. Faites inspecter l'appareil par un
technicien qualifié et remplacez toute partie du système de contrôle et toute commande qui ont été plongés dans
l'eau. »
Avertissement
Une installation, un réglage, une modification, une réparation ou un entretien non con-forme aux normes peut
entraîner des dommages matériels, des blessures (exposition à des matières dange-reuses) ou la mort.
L'installation et l'entretien doivent être effectués par un installateur ou un service d'entretien qualifié ou le
fournisseur de gaz (qui doivent avoir lu les instructions fournies avant de faire l'installation, l'en-tretien ou
l'enlèvement de la chaudière et les respecter. Cette chaudière contient des matériaux qui ont été iden-tifiés
comme étant cancérogènes ou pouvant l'être).
Comment couper l'admission de gaz de L’appareil:
1. Réglez le thermostat à la température la plus basse.
2. Coupez l'alimentation électrique de l'appareil s'il faut procéder à l'entretien
3. Le robinet d'arrêt de gaz est situé dessous la chaudière dans la conduite de gaz.
4.Tourner le robinet sens horaire à "OFF" (fermé) pour arrêter l’alimentation
en gaz. Ne pas forcer.
En cas de surchauffe ou si l'admission de gaz ne peut être coupée, ne pas couper ni débrancher l'alimentation
électrique de la pompe. Fermer plutôt le robinet d'admission de gaz à l'extérieur de l'appareil.
Entretien et inspection
« Inspecter de façon visuelle le système d'évacuation pour déterminer la grosseur et l'inclinaison horizontale qui
conviennent et s'assurer que le système est exempt d'obstruction, d'étranglement, de fuite, de corrosion et autres
défaillances qui pourraient présenter des risques. »
L'entretien et l'inspection de la chaudière doivent être effectués aux occasions suivantes :
•Lorsqu'un certain nombre de codes d'erreur et/ou de verrouillage semblables apparaissent.
•Au moins tous les 12 mois, l'entretien doit être fait pour assurer un fonctionnement sûr et efficace.
Les dommages causés par le manque d'entretien ne seront pas couverts par la garantie
Retrait d'une chaudière existante.
« Au moment du retrait d'une chaudière existante, les mesures suivantes doivent être prises pour chaque appareil
toujours raccordé au système d'évacuation commun et qui fonctionne alors que d'autres appareils toujours
raccordés au système d'évacuation ne fonctionnent pas :»
« Sceller toutes les ouvertures non utilisées du système d'évacuation. »
« Inspecter de façon visuelle le système d'évacuation pour déterminer la grosseur et l'inclinaison horizontale qui
conviennent et s'assurer que le système est exempt d'obstruction, d'étranglement, de fuite, de corrosion et autres
défaillances qui pourraient présenter des risques.
« Dans la mesure du possible, fermer toutes les portes et les fenêtres du bâtiment et toutes les portes entre
l'espace où les appareils toujours raccordés au système d'évacuation sont installés et les autres espaces du
bâtiment. Mettre en marche les sécheuses, tous les appareils non raccordés au système d'évacuation commun
et tous les ventilateurs d'extraction comme les hottes de cuisinière et les ventilateurs des salles de bain. S'assurer
que ces ventilateurs fonctionnent à la vitesse maximale. Ne pas faire fonctionner les ventilateurs d'été. Fermer
les registres des cheminées. » « Mettre l'appareil inspecté en marche. Suivre les instructions d'allumage. Régler
le thermostat de façon que l'appareil fonctionne de façon continue. »
« Une fois qu'il a été déterminé, selon la méthode indiquée ci-dessus, que chaque appareil raccordé au système
d'évacuation est mis à l'air libre de façon adéquate. Remettre les portes et les fenêtres, les ventilateurs, les
registres de cheminées et les appareils au gaz à leur position originale.
« Tout mauvais fonctionnement du système d'évacuation commun devrait être corrigé de façon que l'installation
soit conforme au National Fuel Gas Code, ANSI Z223.1/NFPA 54 et (où) aux codes d'installation CAN/CSA-
B149.1. Si la grosseur d'une section du système d'évacuation doit être modifiée, le système devrait être modifié
pour respecter les valeurs minimales des tableaux pertinents de l'appendice F du National Fuel Gas Code, ANSI
Z223.1/ NFPA 54 et (où) les codes d'installation CAN/CSA-B149.1. »
OUVRIR FERMER

E93.1901EN032 Installation and Service Manual SlantFin VGH-CH / CO 13
2 INTRODUCTION
This manual is the installation and service manual for the high-efficiency heating systems from the VGH-CH
(Central Heating boilers) series and VGH-CO (Combi boilers) series. This manual is specifically written for the
installer.
The distributor and manufacturer are not accountable for any damage caused by installers not correctly following
these instructions.
For service and repair purposes use only original Slant/Fin spare parts.
All documentation produced by the manufacturer is subject to copyright law.
This manual is subject to change without notice.
Terms and abbreviations
In this manual the following terms and abbreviations are used:
A (Amp) Ampère
AFUE Annual Fuel Utilization Efficiency
AHRI Air-conditioning, Heating and Refrigeration Institute
ANSI American National Standards Institute
ASME American Society of Mechanical Engineers
ASSE American Society of Sanitary Engineering
bar Unit of pressure (1 bar = 14.5 PSI)
BCU Burner Control Unit
BTU British Thermal Unit
°C Degree Celsius
CaCO3Calcium carbonate
CH Central Heating.
CO
1. Combi-boiler (CH & DHW)
2. Carbon monoxide
CO2Carbon dioxide
Combi A boiler providing a combination of central heating and domestic hot water
CVPC Chlorinated Polyvinyl Chloride, a thermoplastic
DHW Domestic Hot Water
°F Degree Fahrenheit
Hz Hertz
LB Digit-based Liquid Crystal Display Board
LCD Liquid Crystal Display
LPG Liquefied Petroleum Gas
MBH 1000 BTUs per hour
mg Milligram
NFPA National Fire Protection Association
NOxMono-nitrogen oxides
NPT National Pipe Thread, American standard for threaded pipes and fittings
NTC Negative Temperature Coefficient, a quality of sensors and resistors
O2 Oxygen
PB Graphical Display Board

14 E93.1901EN032 Installation and Service Manual SlantFin VGH-CH / CO
PCB Printed Circuit Board
PEX Cross-linked polyethylene
pH Acidity degree
PID Proportional Integral Derivative, a control concept used in automation
ppm Particles per million
psi Pounds per square inch, a unit of pressure
Pump Circulator
PVC Polyvinyl Chloride, a thermoplastic
PWM Pulse Width Modulation
RCF Refractory Ceramic Fibers
RT Room Thermostat
TDS Total Dissolved Solids, a characteristic used in water quality
UL Underwriters Laboratories, American testing and certification institute
VAC Volt Alternating Current
VDC Volt Direct Current
W Watt, a unit of power
W.C. Water column
Codes, standards and regulations
Installation, maintenance and repairs must be performed in strict accordance with the state and local requirements
and regulations.
In the absence of local requirements, the following standards and regulations apply:
•ASME Boiler and Pressure Vessel Code
Section “Heating boilers”
•ASME Boiler and Pressure Vessel Code
Section “Recommended Rules for the Care and Operation of
Heating Boilers”
•ANSI Z223.1 / NFPA 54
National Fuel Gas Code
•ANSI / NFPA 70
National Electrical Code
•ANSI / NFPA 211
Chimneys, Fireplaces, Vents and Solid Fuel Burning
Appliances
Where required by the authority having jurisdiction, the installation must conform to the Standard for Controls and
Safety Devices for Automatically Fired Boilers, ANSI, ASME CSD-1.
Maintenance and inspection
For a good, safe and long-lasting operation of the boiler and to maintain warranty it is mandatory to carry out
inspection, maintenance and service on the boiler at least once a year.
Maintenance and inspection of the boiler must be carried out in the following situations:
•When a number of similar error codes and/or lockouts appear.
•At least once every 12 months to ensure safe and efficient operation.
Damage caused by lack of maintenance will not be covered under warranty.
Visually inspect the venting system for proper size and horizontal pitch and determine there is no blockage or
restriction, leakage, corrosion or other deficiencies which could cause an unsafe condition.
More details on maintenance, inspections and repairs are covered in chapter 18.

E93.1901EN032 Installation and Service Manual SlantFin VGH-CH / CO 15
For installations in the Commonwealth of Massachusetts
The following local requirements apply in addition to all other applicable NFPA requirements:
For direct-vent boilers, mechanical-vent heating appliances or domestic hot water equipment, where the bottom
of the vent terminal and the intake is installed below four feet above grade, the following requirements must be
met:
1) If not present on each floor level where there are bedrooms, a carbon monoxide detector and alarm must
be placed in a living area outside the bedrooms. The carbon monoxide detector and alarm must comply with
NFPA 720 (2005 Edition).
2) A carbon monoxide detector and alarm must be located in the room that houses the boiler and/or
equipment and must:
a) be powered by the same electrical circuit as the boiler and/or equipment so that only one service switch
services both the boiler and the carbon monoxide detector;
b) have battery back-up power;
c) meet ANSI/UL 2034 Standards and comply with NFPA 720 (2005 Edition); and
d) have been approved and listed by a Nationally Recognized Testing Lab as recognized under 527 CMR.
3) A product-approved vent terminal must be used, and if applicable, a product approved air intake must be
used. Installation must be performed in strict compliance with the manufacturer’s instructions. A copy of the
installation instructions must remain with the boiler and/or equipment at the completion of the installation.
4) A metal or plastic identification plate must be mounted at the exterior of the building, four feet directly above
the location of vent terminal. The plate must be of sufficient size to be easily read from a distance of eight
feet away and read “Gas Vent Directly Below”.
For direct-vent boilers mechanical-vent heating boilers or domestic hot water equipment, where the bottom of the
vent terminal and the intake is installed higher than four feet above grade, the following requirements must be met:
1) If not present on each floor level where there are bedrooms, a carbon monoxide detector and alarm must
be placed in a living area outside the bedrooms. The carbon monoxide detector and alarm must comply with
NFPA 720 (2005 Edition).
2) A carbon monoxide detector must:
a) be located in the room where the boiler and/or equipment is located;
b) be either hard-wired or battery powered or both; and:
c) comply with NFPA 720 (2005 Edition).
3) A product-approved vent terminal must be used, and if applicable, a product- approved air intake must be
used. Installation must be in strict compliance with the manufacturer’s instructions. A copy of the installation
instructions must remain with the boiler and/or equipment at the completion of the installation.

16 E93.1901EN032 Installation and Service Manual SlantFin VGH-CH / CO
3 TECHNICAL DATA VGH RESIDENTIAL BOILERS
FUNCTIONAL INTRODUCTION
The VGH boilers are central heating/combi boilers with a maximum high efficiency. Such a performance can be
reached by, amongst other things, using a special heat exchanger made of stainless steel. This allows the flue
gases to cool down below the condensation point, thus releasing extra heat. This has an immediate positive impact
on the efficiency.
The VGH boiler is factory set for Natural gas.
Fuel used must have Sulphur rates with a maximum annual peak over a short period of time of 150 mg/m3(110
ppm) and an annual average of 30 mg/m3. (22 ppm average).
Boiler control includes:
Cascade control for up to sixteen boilers
Remote operation and heat demand indication from each boiler
Weather compensation control – Outdoor reset.
Indirect tank control (On heat only boiler models)
Connections for VGH-CH boilers:
On/Off thermostat or modulating thermostat
0-10 VDC remote flow temperature (set point) control
0-10 VDC remote boiler input control
Outdoor temperature sensor
External indirect tank circulator or diverter valve
PWM control for external boiler circulator.
Low Water Cut Off
System circulator
External flow switch or external safety device.
Modbus
External system sensor
DHW indirect sensor or aquastat.
External Ignition coil
Alarm outputs
Connections for VGH-CO boilers:
On/Off thermostat or modulating thermostat
0-10 VDC remote flow temperature (set point) control
0-10 VDC remote boiler input control
Outdoor temperature sensor
PWM control for external boiler circulator.
Low Water Cut Off
System circulator
External flow switch or external safety device.
Modbus
External system sensor
External Ignition coil
Alarm outputs

E93.1901EN032 Installation and Service Manual SlantFin VGH-CH / CO 17
Location of version numbers
Burner Controller Hardware Version
– To be found on the second line of the white sticker on the side of the burner controller.
e.g. 957MN15_3Rh4b
Burner Controller Software Versions
•Press the menu button
•Go to Information
•Go to Software Versions.
Information
Software Versions
Boiler Status
Boiler History
Error Log
i
Figure 3.1
Software Versions
Display [63EF 83BC]
Boiler [5C79 14A9]
Device Group 900MN
Figure 3.2
Figure 3.3

18 E93.1901EN032 Installation and Service Manual SlantFin VGH-CH / CO
Technical specifications datasheets
TECHNICAL SPECIFICATIONS VGH-80-CH /VGH-90-CO /VGH-100-CH
GENERAL
Boiler category -
IV
Type boiler VGH-80-CH VGH-90-CO VGH-100-CH
Dimensions (h x w x d) inch (mm) 28.2" x 17.4" x 16.9" (717mm x 442mm x 429mm)
Water content gallon
(liter) 0.37 (1.4) 0.37 (1.4) 0.4 (1.75)
Weight (empty) lbs (kg) 74 (34) 77 (35) 77 (35)
Supply/return connection
CH inch NPT ¾” NPT ¾” NPT ¾”
Supply/return connection
DHW inch NPT ¾” NPT ½” NPT ¾”
Gas connection inch NPT ¾” NPT ¾” NPT ¾”
Flue connection inch (mm) 3” (80mm) 3” (80mm) 3” (80mm)
GAS CONSUMPTION Values min-max:
Natural gas ft3/h
m3/h 7.43 – 74.3 0.21 – 2.11 8.36 – 83.6 0.24 – 2.37 9.29 – 92.9 0.26 – 2.63
Propane 1 ft3/h
m3/h 3.20 – 32.0
0.09 – 0.91 3.60 – 36.0 0.10 – 1.02 4.0 – 40.0 0.11 – 1.13
Gas supply
pressure
nominal 2
Nat. gas Inch W.C./
(mbar) 7.0 (17.4)
Propane Inch W.C./
(mbar) 11.0 (27.4)
NOTES
1Using propane, maximum fan speed needs to be reduced
2Min. and max. gas supply pressures are listed in the table below.
p nom inch W.C. (mbar)
p min inch W.C. (mbar)
p max inch W.C. (mbar)
Natural gas
7.0 (17.4)
3.5 (8.7)
10.5 (26.2)
Propane
11.0 (27.4)
8.0 (19.9)
13.0 (32.4)
Table 3. 1

E93.1901EN032 Installation and Service Manual SlantFin VGH-CH / CO 19
Type boiler VGH-80-CH VGH-90-CO VGH-100-CH
CO2flue gas 3
Natural gas
Low Fire %
9.4 – 8.9
High Fire %
9.1 – 8.4
Propane
Low Fire %
9.8
High Fire %
10.1
O2flue gas 3
Natural gas
Low Fire %
4.1 – 5.0
High Fire %
4.6 – 6.0
Propane
Low Fire %
6.0
High Fire %
5.5
Flue gas temperature at
combustion air temperature =
70 °F (20 °C)
°F (°C) 86 – 153 (30 – 67)
Available pressure for the flue
and inlet system 4Inch W.C. (Pa) 250 320 230
INSTALLATION
Resistance
boiler
∆T = 20 F
ft.head (m.W.C.)
26.3 (8.0)
26.3 (8.0)
35.6 (10.9)
∆
T = 35 F
ft.head (m.W.C.)
8.8 (2.7)
8.8 (2.7)
12.7 (3.9)
Pressure boiler min-max.
psi (bar)
11.6 – 43.5 (0.8 – 3.0)
Max. supply temperature
°F (°C)
194 (90)
DHW PERFORMANCE
flow rate at
∆
T = 77 °F
gal/min (l/min)
-
2.3 (8.7)
-
Pressure DHW min-max
psi (bar)
-
14.5 - 116 (1.0 -8.0)
-
Thermal Efficiency 6% 95.0
ELECTRIC
Minimum power consumption
W
140
140
140
Maximum power consumption
W
180
190
180
Standby power consumption W 6 6 6
Power supply
V/Hz
120 / 60
Protection class
-
IPX4D
5
NOTES
3CO2or O2of the unit measured/set without the boiler front panel in place
4Maximum allowed combined resistance of flue gas and air supply piping at high fire
5For gas appliance type B23(P) (Room Air) only class IPX4D with special air inlet, otherwise the
protection class is IP20 (see also picture below)
6Efficiency of DHW performance measured according to ANSI Z21.10.3-2015 • CSA 4.3-2015
Table 3. 2
Figure 3.6
IPX4D Air inlet.
Two 90° Bends with a bird screen
Boiler is IP20
applying a bird
screen only

20 E93.1901EN032 Installation and Service Manual SlantFin VGH-CH / CO
TECHNICAL SPECIFICATIONS VGH-120-CH /VGH-150-CO /VGH-150-CH
GENERAL
Boiler category -
IV
Type boiler
VGH-120-CH
VGH-150-CO
VGH-150-CH
Dimensions (h x w x d) Inch (mm) 28.2" x 17.4" x 16.9" (717mm x 442mm x 429mm)
Water content Gallon
(liter) 0.55 (2.1) 0.55 (2.1) 0.83 (3.15)
Weight (empty) Lbs (kg) 83 (38) 86 (39) 97 (44)
Supply/return connection
CH inch NPT ¾” NPT ¾” NPT ¾”
Supply/return connection
DHW inch NPT ¾” NPT ½” NPT ¾”
Gas connection inch NPT ¾” NPT ¾” NPT ¾”
Flue connection Inch (mm) 3” (80mm) 3” (80mm) 3” (80mm)
GAS CONSUMPTION Values min-max:
Natural gas ft3/h
m3/h 11.1 – 111.5 0.32 – 3.16 13.9 – 139.4 0.40 – 3.95 13.9 – 139.4 0.40 – 3.95
Propane 1 ft3/h
m3/h 4.8 – 48.0
0.14 – 1.36 6.0 – 60.0 0.17 – 1.7 6.0 – 60.0 0.17 – 1.7
Gas supply
pressure
nominal 2
Nat. gas Inch W.C./
(mbar) 7.0 (17.4)
Propane Inch W.C./
(mbar) 11.0 (27.4)
NOTES
1Using propane, maximum fan speed needs to be reduced
2Min. and max. gas supply pressures are listed in the table below.
p nom inch W.C. (mbar)
p min inch W.C. (mbar)
p max inch W.C. (mbar)
Natural gas
7.0 (17.4)
3.5 (8.7)
10.5 (26.2)
Propane
11.0 (27.4)
8.0 (19.9)
13.0 (32.4)
Table 3. 3