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HIGH EFFICIENCY CONDENSING GAS BOILER
INSTALLATION AND SERVICE MANUAL
QUICK CONTENTS
FULL TABLE OF CONTENTS ................................. 2
1.0 SAFETY GUIDELINES ........................................... 6
2.0 INTRODUCTION. ................................................... 8
3.0 TECHNICAL DATA .............................................................. 9
4.0 BOILER DIMENSIONS ............................................ 13
5.0 ACCESSORIES AND UNPACKING ......................... 16
6.0 INSTALLATION LOCATION ...................................... 17
7.0 CONNECTIONS ....................................................... 20
8.0 CIRCULATOR CHARACTERISTICS ....................... 29
9.0 FLUE GAS AND AIR SUPPLY SYSTEM ................ 32
10.0 CASCADING APPLIANCE .................................... 54
11.0 ELECTRICAL INSTALLATION .................................. 56
12.0 BOILER CONTROLLER AND DISPLAY ................... 64
13.0 TEMPERATURE PROTECTION ........................... 86
14.0 ERROR INFORMATION ............................................ 86
15.0 CASCADING SYSTEM SETUP ............................. 93
16.0 SYSTEM TEST ..................................................... 98
17.0 COMMISSIONING THE BOILER ........................... 99
18.0
ADJUSTING AND SETTING THE BOILER ......... 101
19.0 INSPECTION, MAINTENANCE AND SERVICE ... 108
20.0 USER INSTRUCTIONS ...................................... 118
21.0 INSTALLATION EXAMPLES ............................... 118
22.0 SPARE PARTS ................................................... 123
WARNING: If the information in
this manual is not followed
exactly, a fire or explosion may
result causing property damage,
personal injury or loss of life.
- 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
of California to cause cancer, birth defects, or other reproductive harm.
Heating Contractor
Address
Phone Number
E93.1601EN032C
MODELS VGH-299-CH, VGH-399-CH
and VGH-500-CH
- WHAT TO DO IF YOU SMELL GAS
Do not try to light any appliance.
•
Do not touch any electrical switch; do not use
•
any phone in your building.
Immediately call your gas supplier from a
•
neighbor's phone. Follow 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.
Boiler Model Number
Boiler Serial Number
Installation Date
This manual must be left
with owner and must be
hung on or adjacent to
the boiler for reference.
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Summary of Contents for Slant/Fin VGH-299-CH
- Page 1 This manual must be left with owner and must be hung on or adjacent to the boiler for reference. MODELS VGH-299-CH, VGH-399-CH and VGH-500-CH HIGH EFFICIENCY CONDENSING GAS BOILER INSTALLATION AND SERVICE MANUAL QUICK CONTENTS FULL TABLE OF CONTENTS ......... 2 1.0 SAFETY GUIDELINES ...........
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Page 2: Table Of Contents
TABLE OF CONTENTS SAFETY GUIDELINES ..............................6 INTRODUCTION ................................8 ..............................8 XPLANATIONS ..........................8 AINTENANCE AND INSPECTION ................8 OR INSTALLATIONS IN THE OMMONWEALTH OF ASSACHUSETTS TECHNICAL DATA VGH BOILERS .......................... - Page 3 FLUE GAS AND AIR SUPPLY SYSTEM ........................32 ............................... 32 ENERAL VENTING 9.1.1 Vent sizing............................32 9.1.2 Vent and air inlet resistance table ...................... 33 ........................33 ENT AND AIR INTAKE PIPE MATERIAL 9.2.1 ...
- Page 4 ............................71 ONTROL FUNCTIONS 12.8.1 Room thermostat only; CH mode 0 (Default setting) ................71 12.8.2 CH with an outdoor temperature reset and thermostat; CH mode 1 ..........72 12.8.3 CH with constant circulation system outdoor reset; CH mode 2 ............74 ...
- Page 5 IMPORTANT READ ALL OF THE FOLLOWING WARNINGS AND STATEMENTS BEFORE READING THE INSTALLATION INSTRUCTIONS DANGER Danger Sign: indicates the presence of an imminently hazardous situation that will cause death, serious personal injury or substantial property damage. WARNING Warning Sign: indicates the presence of a hazardous situation which can cause death, serious personal injury or substantial property damage.
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Page 6: Safety Guidelines
SAFETY GUIDELINES E93.1601EN032.C VGH installation manual... - Page 7 Instead, shut off the gas supply at a location external to the appliance.” DANGER Slant/Fin recommends the installation of a carbon monoxide detector in the boiler room for all installations. NOTICE 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.
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Page 8: Introduction
INTRODUCTION This manual is written for the Installer. Slant/Fin is not accountable for any damage caused by failure to correctly follow 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. -
Page 9: Technical Data Vgh Boilers
TECHNICAL DATA VGH BOILERS Functional introduction The VGH boilers are central heating 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, and so release extra heat. -
Page 10: Technical Specifications Datasheet
Technical specifications datasheet GENERAL Boiler category Model boiler VGH 299 CH VGH 399 CH VGH 500 CH Dimensions (h x w x d) Inch (mm) 33.3 x 17.3 x 20.9 (845 x 440 x 530) Gallon Water content 1.77 (6.7) 2.19 (8.3) 2.74 (10.4) (liter) -
Page 11: High Altitude Operation
Model boiler VGH 299 CH VGH 399 CH VGH 500 CH Natural gas 9.8 – 9.2 flue gas Low fire – High fire Propane 11.0 - 10.4 Natural gas 3.7 – 4.7 flue gas Low fire – High fire Propane 4.1 - 5.0 Flue gas temperature at combustion air temperature =... -
Page 12: Ahri Specifications
AHRI Specifications VGH series AHRI Thermal Combustion Input, MBH Model Output AFUE Net Ratings Efficiency, Efficiency, number Water, MBH VGH 299 CH 59.0 95.1 VGH 399 CH 80.0 95.5 95.4 VGH 500 CH 98.0 95.1 94.5 Listed Input and Output ratings are at minimum vent lengths at Sea Level. Numbers will be lower with longer venting and/or altitudes greater than 2000 feet [610 m]. Output means ‘Heating Capacity’ for VGH 299 CH, and ‘Gross Output’ for VGH 399 CH and VGH 500 The maximum input when operating on LP‐Gas is 397 MBH. ... -
Page 13: Boiler Dimensions
BOILER DIMENSIONS VGH 299 CH Connections VGH 299 CH NPT 1½” Supply NPT 1½” Return Condensate Flexible hose Ø 1.06” (26.9 mm) NPT 1” Table 4. 1 Figure 4. 1 E93.1601EN032.C VGH installation manual... -
Page 14: Vgh 399 Ch
VGH 399 CH Connections VGH 399 CH NPT 1½” Supply NPT 1½” Return Condensate Flexible hose Ø 1.06” (26.9 mm) NPT 1” Table 4. 2 Figure 4. 4 E93.1601EN032.C VGH installation manual... -
Page 15: Vgh 500 Ch
VGH 500 CH Connections VGH 500 CH NPT 1½” Supply NPT 1½” Return Condensate Flexible hose Ø 1.06” (26.9 mm) NPT 1” Table 4. 3 Figure 4.3 E93.1601EN032.C VGH installation manual... -
Page 16: Accessories And Unpacking
ACCESSORIES AND UNPACKING Optional Accessories Depending on the selected controlling behavior for the central heating system and/or the optional use of an indirect tank, the following items are available as accessories. Slant Fin part number Item Asme pressure 75 psi relief valve. 432552000 External flow temperature sensor for behind the low loss header: 10kOhm@77°F 81 7109 000... -
Page 17: Installation Location Of The Vgh
INSTALLATION LOCATION OF THE VGH Installation Clearances On all sides of the boiler at least 2” of clearance must be applied to walls or wall units, 14” above the top side of the boiler and 10” from the bottom of the boiler. Model No. -
Page 18: Boiler Installation Location Requirements
Boiler Installation Location Requirements: The installation of this boiler when installed using room air must comply to NFPA 54. The flue gas pipes must be connected to the outside wall and/or the outside roof. (“Flue gas instructions” manual.) ... -
Page 19: Mounting The Boiler
Mounting the boiler Before mounting and installing the boiler the following connections must be considered: Flue gas system and the flue gas pipe connections Air supply system and connections Supply and return pipe connections Condensate and pressure relief valve drainage ... -
Page 20: Connections
NFPA54. If you experience a pressure drop of greater than 1” w.c., regulator or gas line is undersized. Slant/Fin recommends a nominal value of 7” to 10” W.C. of gas pressure when using Natural gas and 11 to 13”... -
Page 21: Condensate Drain Connection
Install a manual “Equipment Shut-Off Valve”. The valve Gas supply inlet must be listed by a nationally recognized testing lab. Should overheating occur or the gas supply fail to shut off, turn off the manual gas control valve. The gas line piping can safely be removed from the appliance for servicing. -
Page 22: Flow And Return Connections
When mounting the bottom part of the condensate trap, before commissioning the boiler and/or after maintenance, the condensate trap must ALWAYS be completely filled with water. This is a safety measure: the water in the condensate trap keeps the flue WARNING gases from leaking out of the heat exchanger via the condensate drain. -
Page 23: Non-Return Valve . (299 & 399)
NON-Return valve. (299 & 399) Both boilers VGH 299 CH and VGH 399 CH have a non-return valve installed in the gas-air mixing pipe just before the burner. Flue gas recirculation is prevented by the non-return valve. The prevention of recirculation also reduces standby loses through the flue of the boiler. -
Page 24: Water Quality
Water quality The pH value is reached with the steady Maximum allowable conditions. These steady conditions will occur, Contaminant level Units when after filling the heating system (pH around 7.5 to 9.5 7) with fresh water, the water will lose its air Hardness 50 to 150 mg/l CaCo3... -
Page 25: Chemical Water Treatment
These anti-freeze products are: Manufacturer Type Composition Fernox Alphi 11 consists of 97% Mono Propylene Glycol next to some additives. Sentinel X500 estimated as being between 90-100% Mono Propylene Glycol. Rhomar Rhogard Blended with VIRGIN Propylene Glycol Table 7.3 When using other glycol-based antifreeze products make sure that it is an equivalent product to the products mentioned above which will behave exactly the same on all materials and equipment in the heating systems. -
Page 26: Under Floor Heating
Under floor heating When using an under floor heating system with non-oxygen barrier PEX,, the boiler circuit must be separated from the heating circuit with a plate heat exchanger. Flush the system with fresh water The water of the boiler and heating circuit must be free of any particles, debris and pollution. Therefore, the complete installation must always be thoroughly flushed with clean water before installing and using the boiler(s). -
Page 27: Automatic Feed Valve
The following scheme below shows the behavior of the 3-way valve and boiler circulator during one whole cycle of De-Air sequence with a DAir_Repetition_OnOff set to 2. Boiler Circulator Figure 7. 8 Relevant variables: Specific Parameters Level (Default) Value Range De_Air_Config 2: Installer 0…1... -
Page 28: Installation Examples
Installation examples 7.21.1 E XAMPLE OF A NORMAL SINGLE BOILER HEATING CIRCUIT WITH LOW LOSS HEADER PREFERABLE valve Boiler circulator air separator BOILER Heating circulator Flow/System dirt separator temperature sensor strainer (water filter) pressure relief valve HEATING ZONE condensate trap circulator automatic air vent expansion vessel... -
Page 29: Circulator Characteristics
CIRCULATOR CHARACTERISTICS Hydraulic graphs 8.1.1 VGH 299 CH OILER RESISTANCE GRAPH Resistance graph VGH 299 CH 35°F 25°F 20°F Figure 8. 1 Flowrate [gallons (US)/minute] 8.1.2 VGH 399 CH OILER RESISTANCE GRAPH Resistance graph VGH 399 CH 35°F 25°F 20°F Flowrate [gallons (US)/minute] Figure 8. 2 E93.1601EN032.C VGH installation manual... -
Page 30: Boiler Resistance Graph Vgh 500 Ch
8.1.3 VGH 500 CH OILER RESISTANCE GRAPH Resistance graph VGH 500 CH 35°F 25°F 20°F Figure 8. 3 Flowrate [gallons (US)/minute] Minimum required circulator head. Boiler at flow rate min required feet of head [gpm] VGH 299 CH VGH 399 CH VGH 500 CH Table 8. 1 Modulating circulator for CH demand It is possible to connect a PWM circulator. -
Page 31: Delta Temperature Modulation
8.4.1 ELTA TEMPERATURE MODULATION When the modulating circulator mode 1 Delta temperature modulation is selected the circulator modulates to create a delta of T_Delta between the T_Supply and T_Return sensors. This modulation is only done when the control is in burn. When the boiler starts the duty cycle is kept at the Default Duty cycle setting for the time set by Burn Stabilize Time. -
Page 32: Flue Gas And Air Supply System
FLUE GAS AND AIR SUPPLY SYSTEM General venting. The boiler has a positive pressure vent system. The boiler is for either direct vent installation or for installation using indoor combustion air, category IV, appliance with sealed combustion requiring certain venting systems. All combustion air is drawn from outdoors or indoor. All products of combustion are vented directly outdoors. -
Page 33: Vent And Air Inlet Resistance Table
9.1.2 ENT AND AIR INLET RESISTANCE TABLE Minimum and maximum allowable combined vent and air inlet length: - Minimum venting length: two feet (2 ft) for all boilers - Maximum venting length: see table below. Maximum Exhaust Length / Maximum Combustion Air Intake Length VGH 299 VGH 399 VGH 500... -
Page 34: Approved Manufacturers
9.2.1 PPROVED MANUFACTURERS PVC/ CPVC venting: * IPEX System 636 Polypropylene venting: * Duravent - PolyPro * Centrotherm - InnoFlue Stainless steel venting: * Duravent - FasNSeal, FasNSeal Flex * Security Chimneys - Secure seal SS/SSD/SSID READ THE MANUAL PROVIDED BY THE VENT GAS AND AIR SYSTEM SUPPLIER CAREFULLY NOTICE PVC/ CPVC... -
Page 35: Instructions For Working With Cementing Pvc/ Cpvc Pipe Connections
Insulation may not be used on PVC or CPVC venting materials. The use of insulation will cause increased vent wall temperatures, which could result in vent pipe failure. The PVC/ CPVC pipe and fittings must be cemented using an “All Purpose Cement” suitable for PVC and CPVC pipe. -
Page 36: Polypropylene
Polypropylene This product has been approved for use with polypropylene vent with the manufacturers listed. All terminations must comply with listed options in this manual and be a single-wall vent offering. For support and special connections required, see the manufacturer's instructions. All vent is to conform to standard diameter and equivalent length requirements established. -
Page 37: Flexible Polypropylene
9.4.1 LEXIBLE POLYPROPYLENE For use of flex pipe, it is recommended to have the vent material in 32°F or higher ambient space before bending at installation. No bends may be made to greater than 45° and ONLY installed in vertical or near vertical installations. -
Page 38: Sealed Combustion Air Supply
Sealed Combustion Air supply When an air supply pipe is connected from the outside of the building to the boiler, the boiler will operate as a sealed combustion boiler. The air supply duct can be made of PVC, PP or Stainless steel 9.5.1 OMBUSTION AIR QUALITY Combustion air must be free of contaminants. -
Page 39: Air Inlet Pipe Materials
9.5.4 IR INLET PIPE MATERIALS The air inlet pipe(s) must be sealed. Choose acceptable combustion air inlet pipe materials from the following list: - PVC, CPVC or PP - Flexible propylene air intake - Galvanized steel vent pipe with joints and seams sealed as specified in this section. - Type “B”... -
Page 40: Room Air
Room air Commercial applications utilizing the boiler may be installed with a single pipe carrying the flue products to the outside while using combustion air from the equipment room. In order to use the room air venting option, the following conditions and considerations must be followed. •... -
Page 41: Proper Vent Installation And Type Of Gas Vent Or Vent Connector
The boiler may never be located in a laundry room or pool facility, for example, these areas will always contain hazardous contaminants. To prevent the potential of severe personal injury or death, check for areas and products listed in the list below, with contaminants before installing the boiler or air inlet piping. WARNING If contaminants are found, you MUST: - remove contaminants permanently. -
Page 42: Install Vent And Combustion Air Piping
Install vent and combustion air piping The boiler must be vented and supplied with combustion and ventilation air as described in this section. Ensure the vent and air piping and the combustion air supply comply with these instructions regarding vent system, air system, and combustion air quality. See also sections "Determine vent location"... -
Page 43: Direct Venting Options
Direct venting options Two pipe wall Two pipe vertical See page 45 for more details. See page 50 for more details. Figure 9-4 Figure 9-5 Concentric wall - two pipe to boiler Concentric wall - concentric to boiler Boilers VGH 299 and 399 only. Boilers VGH 299 and 399 only. - Page 44 Concentric vertical - two pipe to boiler Concentric vertical - concentric to boiler Boilers VGH 299 and 399 only. Boiler VGH 299 and 399 only. See page 50 for more details See page 50 for more details. Figure 9-8 Figure 9-9 E93.1601EN032.C VGH installation manual...
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Page 45: Wall (Horizontal) Direct Venting
Wall (Horizontal) direct venting. 9.11.1 V AIR TERMINATION WALL Follow instructions below when determining vent location to avoid possibility of severe personal injury, death, or substantial property damage. A gas vent extending through an exterior wall shall not terminate adjacent to a wall or below building extensions such as eaves, parapets, balconies, or decks. - Page 46 5. Maintain clearances as stated in this manual. Also maintain the following: Figure 9-10 Clearance above grade, veranda, porch, deck, or 12" (30 cm) 12" (30 cm) balcony see note 3 see note 3 Clearance to window or door that may be opened Direct vent only: 12"...
- Page 47 Two pipe sidewall termination of air intake and exhaust vent. Alternate two pipe sidewall termination of air intake and exhaust vent. 12" Min. 16" Max. Figure 9-11 Figure 9-11 Alternate two pipe sidewall termination of air intake and exhaust vent. Figure 9-12 E93.1601EN032.C VGH installation manual...
- Page 48 Two pipe sidewall termination assembly. Figure 9-13 Multiple vent/air terminations 1. When terminating multiple boilers, terminate each vent/air connection as described in this manual (Figure 9- 14). All vent pipes and air inlets must terminate at the same height to avoid possibility of severe personal injury, death, or substantial property damage.
- Page 49 Wall termination – concentric vent: boilers VGH 299 and 399 only Description and usage: concentric combustion air and exhaust vent pipe termination. Both combustion air and exhaust vent pipes must attach to the termination kit. The termination kit must terminate outside the structure and must be installed as shown below in Figure 9-15.
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Page 50: Roof (Vertical) Direct Venting
Concentric sidewall multiple boilers termination. Figure 9-16 NOTE: keep the terminals horizontally in the same line and at min. 12” above grade or snow line. Roof (Vertical) direct venting. 9.12.1 V – AIR TERMINATION VERTICAL Follow instructions below when determining vent location to avoid possibility of severe personal injury, death or substantial property damage. - Page 51 Two pipes vertical termination of air and vent. Figure 9-17 8. Locate terminations so they are not likely to be damaged by foreign objects, such as stones or balls, or subject to buildup of leaves or sediment. Multiple vent/air terminations 1.
- Page 52 Alternate vertical terminations with multiple boilers. Figure 9-19 Note: keep the terminals at min. 12" above grade or snow line. Provide vent and air intake with bird screen. Concentric Vertical Termination. Minimum clearance above snow level (18” for Canada) Maximum 24” above roof or snow level.
- Page 53 Do not operate the appliance with the rain cap removed on the concentric terminations or recirculation of combustion products may occur. Water may also collect inside the larger combustion air pipe and flow to the burner enclosure. Failure to follow this warning could result in product damage or improper operation, personal WARNING injury, or death.
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Page 54: Cascading
CASCADING Appliance The 299 & 399 have an internal flue gas valve for an o verpressure system according to the table 10.1. This device is needed to prevent recirculation of the flue gases. The 500 has no internal flue gas valve and needs to be calculated for a nil pressure common flue system or a separated flue system. -
Page 55: Existing Common Venting Guidelines
Existing Common Venting Guidelines. Do not common vent the VGH boiler with the vent pipe of any other boiler or appliance. However, when an existing boiler is removed from an existing common venting system, the common venting system is likely to be too large for proper venting of the appliances remaining connected to it. -
Page 56: Electrical Installation
ELECTRICAL INSTALLATION General For operation, the boiler needs a power supply of 120 VAC 60Hz. The boiler main supply connection is polarity sensitive. The wiring for the connections can be entered at the bottom of the boiler through the wiring knockouts. ... -
Page 57: Explanation Of The Low Voltage Connections
Explanation of the low voltage connections. OUTDOOR SENSOR If an outdoor temperature sensor is connected, the boiler will control the supply water temperature by using a calculated setting based on outdoor reset curve, which is related to the outdoor temperature. SYSTEM SENSOR If a low loss header is used, this sensor measures the flow temperature at the system side. -
Page 58: Explanation Of The High Voltage Connections
Explanation of the high voltage connections. 1-2-3-PE DIVERTER VALVE DHW indirect tank If an indirect domestic hot water tank is installed, a 3-way valve or a circulator (P2) can be used to divert hot water to the heating coil of the tank. This 3-way valve will open, or circulator will power on, when the indirect tank has a heat demand. -
Page 59: Ladder/Logic Diagram
Ladder/Logic Diagram Figure 11. 3 E93.1601EN032.C VGH installation manual... -
Page 60: Electrical Schematics
Electrical schematics Figure 11. 4 E93.1601EN032.C VGH installation manual... - Page 61 Figure 11. 5 E93.1601EN032.C VGH installation manual...
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Page 62: Sensor Availability
Sensor availability The following table shows the sensor availability for all CH and DHW control modes. Sensors not mentioned in the table are optionally available for other functions CH Mode T_Supply T_Return T_DHW T_Outdoor 0-10 Volt Water Flow DHW RT Switch M = Mandatory, O = Optional, --- = Disabled. -
Page 63: Programmable In- And Outputs
Programmable in- and outputs It is possible to re-program some in- and outputs to other functions. To do this use list below and go to: Menu\settings\boiler settings\"1122" (installer password)\boiler parameters boiler parameter name default setting description terminal (117) Prog. Input 2. DHW flow switch LV 16-17 (118) -
Page 64: Boiler Controller And Display
BOILER CONTROLLER AND DISPLAY. Display and buttons Picture 12. 1 ON/OFF. On/off switch. Switches electrical power to the boiler Connector for computer cable ... -
Page 65: Screens And Settings
Screens and settings. This screen is active during power up and will remain active until communication with the Main Control (the AL- BUS) has been established. Picture 12. 2 After communication has been established the following Status overview appears: 59.0 °F 59.0 °F 176.0 °F 176.0 °F... -
Page 66: Protected Menu Items
If CH-mode is set to: CH mode 1 – CH with an outdoor temperature reset and thermostat control CH mode 2 – Central Heating with full outdoor temperature reset The following display will appear: Central Heating (CH) Outdoor Reset Picture 12. 6 Enter a menu item by pressing CONFIRM or RIGHT →... -
Page 67: De-Aeration Sequence
BE AWARE: DO NOT set the language to the Chinese Language if you are not familiar with this language. Contact Slant/Fin for instructions if the display is set to Chinese and needs to be reset to another language. Please follow the next steps, which describe how to set the display to a specific language: 1. -
Page 68: Service Reminder
Error Log Error Log Filter Error Type Disabled Clear Error Log Picture 12.12 (Sub) Menu item Description Error Log Show the error log (based on the selected filter options) Filter Error Type Filter errors based on the Error Type (Lockout/Blocking) Filter Boiler ID (Cascade System only) Filter errors based on Boiler ID (Managing, Dep 1, Dep2, etc.) Clear Error Log... -
Page 69: Menus And Parameters
To remove the message "Service is required": menu/ Information/ Service/ "Reset service reminder". Enter the installer password, the "Reset service reminder" can be set to "YES" for resetting the service reminder. The overdue time is recorded in the service history. 12.5.3 M ’... -
Page 70: Flue Temperature Protection
12.6.3 LUE TEMPERATURE PROTECTION The flue temperature protection function protects against the flue gas reaching a too high temperature. • When the T_Flue or T_Flue_2 sensor measures above the Max_Flue_Gas_Temp, the control generates a Flue_Gas_Error. • When the Flue Switch closes, the control generates a Flue_Gas_Error. When the control is in a Flue_Gas_Error the fan will run at the minimum fan speed. -
Page 71: Flame Detection
12.7.1 F LAME DETECTION When the boiler is firing, and the flame is not detected anymore, the gas valve will be closed, and the control will perform a post-purge, after which a restart will take place. The presence of a flame is measured through the flame rod that points into the flame. The flame current is measured by the control as ionization in micro amps (μA). -
Page 72: Ch With An Outdoor Temperature Reset And Thermostat; Ch Mode 1
Adjustable Set Point Heating Parameters Specific Parameters Level Default Value Range CH_Mode 2: Installer Mode 0-5 CH Setpoint 2: Installer 176 ºF (80 ºC) 68…..194 ºF (20…..90 ºC) Sets the required supply temperature. CH_Post_Circulator_Time 2: Installer 120 sec. 10…..900 sec Anti_Cycle_Period 2: Installer 180 sec... - Page 73 Boost function The outdoor reset boost function increases the CH_Setpoint by a prescribed increment (Boost_Temperature_Incr) if a call for heat continues beyond the pre-set time limit (Boost_Time_Delay). Boiler Parameters (25) Warm Weather Shutdn 72 °F ▲ (26) Boost Temp increment °F (27) Boost Time Delay 20 min...
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Page 74: Ch With Constant Circulation System Outdoor Reset; Ch Mode 2
12.8.3 CH ; CH WITH CONSTANT CIRCULATION SYSTEM OUTDOOR RESET MODE When CH_Mode is set to 2, full weather compensator is chosen. For this mode an outdoor sensor has to be connected. The CH_Setpoint is calculated on the same way as described in § 12.7.2. However, the demand does not depend on the Room Thermostat input but on the outdoor temperature and the outdoor reset setpoint. -
Page 75: Central Heating With Analog Input Control Of Setpoint; Ch Mode 4
12.8.5 C ; CH ENTRAL EATING WITH ANALOG INPUT CONTROL OF SETPOINT MODE CH mode is set to 4. In this mode of operation, the boiler CH setpoint is controlled by an analog input signal provided by a remote means such as a Building Management System or a system controller. The analog input 0- 10 Vdc is used to adjust the boiler setpoint between the CH_Setpoint_Min and the CH_Setpoint_Max settings. -
Page 76: Ch With Analog Input Control Of Power Output; Ch Mode 5
12.8.6 CH ; CH WITH ANALOG INPUT CONTROL OF POWER OUTPUT MODE In this mode of operation, the boiler power (boiler input) is controlled by an analog input signal provided by a remote means such as a Building Management System or a system controller. The analog input 0-10 VDC is used to adjust the boiler power output between the minimum boiler input and the maximum boiler input settings. -
Page 77: Demand For Domestic Hot Water
Demand for Domestic Hot Water 12.9.1 N ; DHW OMESTIC ATER MODE No domestic hot water is available. The T_DHW_Out sensor does not need to be connected. 12.9.2 DHW S ; DHW TORAGE WITH SENSOR MODE Mode 1: DHW is prepared by warming up a store. Either a DHW circulator or 3-way valve can be used to switch to DHW mode. -
Page 78: Dhw Storage With Thermostat; Dhw Mode 2
12.9.3 DHW S ; DHW TORAGE WITH THERMOSTAT MODE In this mode DHW is prepared by warming up an indirect tank. Either a DHW circulator or 3-way valve can be used to switch to DHW mode. The temperature of the DHW in the indirect tank is regulated by a thermostat/aquastat (instead of a sensor), which must provide only an open/closed signal to the control. -
Page 79: Anti-Legionella Protection
12.9.5 LEGIONELLA PROTECTION Anti-Legionella protection is enabled for DHW modes with an external tank with a sensor (DHW Mode 1). To prevent legionella a special function is implemented in the software. When DHW Mode 1 is selected the Anti-Legionella protection will be checked on the T_DHW_Out sensor. At least once every 168 hours (7 days) the Anti_Legionella_Sensor must reach a temperature above Anti_Legionella_Setpoint for a time specified by Anti_Legionella_Burn_Time. -
Page 80: Display Menu Structure Summary
12.9.6 D ISPLAY MENU STRUCTURE SUMMARY Menu structure Display: Access Description: level 1. Central Heating (CH) User Enter the Central Heating (CH) menu 2. Domestic Hot Water (DHW) User Enter the Domestic Hot Water (DHW) menu 3. Information User Enter the Information menu 4. - Page 81 3.2 Boiler status min. max. Default unit Access Description: level Flow Temperature °F (°C) User Actual supply flow temperature Flow 2 Temperature °F (°C) User Actual supply 2 flow temperature Return Temperature DHW Temperature °F (°C) User Actual DHW temperature DCW Temperature °F (°C) User...
- Page 82 4.1 General settings min. max. Default unit Access Description: level 4.1.1 Language User Enter the Language menu 4.1.2 Unit Type User Enter the Unit Type menu 4.1.3 Date & Time User Enter the Date & Time menu 4.1.4 Cascade Mode User Enter the Cascade Mode menu 4.1.5 Other Settings...
- Page 83 4.2.1 Boiler min. max. Default unit Access Description: Displ parameters level CH mode Installer Set the CH mode CH Setpoint °F Installer Set the CH setpoint (20) (90) (85) (°C) Calc. Setp. Offset °F Installer Set the offset for CH mode 1 (-10) (10) (°C)
- Page 84 cont: min. max. Default unit Access Description: 4.2.1 Boiler level play parameters PreHeat mode Installer Set the PreHeat Eco mode Prog. Input 2. Installer Select the function for programmable input 2 Prog. Input 3. Installer Select the function for programmable input 3 Prog.
- Page 85 4.2.2 Module Cascade min. max. Default unit Access Description: Settings level play Hyst. Up Stop Module °F Installer Set the hysteresis up after (40) (°C) which a module is stopped Hyst. Down Quick Start °F Installer Set the fast hysteresis (40) (10) (°C)
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Page 86: Temperature Protection
TEMPERATURE PROTECTION The difference between Supply temperature and Return Temperature is continuously monitored. A too big difference can indicate a defective pump or a clogged heat exchanger. To protect the boiler, the burner controller reduces the input when the temperature difference ∆T becomes too high: At maximum boiler input ∆T is limited to 63 °F (35 °C) (Hx_Diff_DeltaT_Min). -
Page 87: Lockout Codes
Lockout codes Lock Error Description Cause Solving code E2PROM_READ Internal software error wrongly reset BCU or replace BCU _ERROR programmed BCU and or display unit or PB IGNIT_ERROR Five unsuccessful ignition no gas, wrongly check gas supply and attempts in a row adjusted gas valve adjust gas valve, reset GV_RELAY_... - Page 88 Lock Error Description Cause Solving code MAX_TEMP_ The external overheat Burner door clixon Check burnerdoor gasket ERROR protection is enabled or tripped because of and replace burner door the T_Supply sensor overheating of the gasket and reset clixon on measures a temp. of over burner door or the burner door or check Prot_Overheat_Temp -...
- Page 89 Lock Error Description Cause Solving code LWCO_1_ Low water cut off 1 error There is no water in Check if there is enough ERROR the heat exchanger water in the heat exchanger or not electrically if not so fill up the system connected LWCO_2_ Low water cut off 2 error...
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Page 90: Blocking Codes
Blocking codes Lockout Error Description Cause Solving code WD_ERROR_R Internal software error wrongly reset BCU or replace BCU programmed BCU and or display unit or PB WD_ERROR_R Internal software error wrongly reset BCU or replace BCU programmed BCU and or display unit or PB WD_ERROR_ST Internal software error... - Page 91 Lockout Error Description Cause Solving code LOW_WATER_P Low water pressure, Not enough water Fill up the system and RESSURE_SEN generated when the pressure check if there are any pressure drops below water leakages Minimal_Pressure, or when the pressure drops below 4.5 PSI .
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Page 92: Warnings
Lockout Error Description Cause Solving code WD_CONFIG_E Watchdog fan configuration wrongly program- reset BCU or replace BCU RROR setting error med BCU or PB and or display unit FILL_WARNING Error is generated The water refill the system until the immediately when the pressure is below pressure is above 1 Bar or pressure drops below... -
Page 93: Cascading
CASCADING System setup NOTE: for proper functioning of the system, some settings have to be changed, see § 15.4.2 "Emergency mode". The boiler controller can control multiple boilers in a cascade setup. A system sensor input is available on the burner controller to measure the cascade system supply temperature. A circulator output is also available to run the system circulator, as well as an output for the DHW circulator. -
Page 94: Setting The Boiler Address
15.2.1 S ETTING THE BOILER ADDRESS NOTICE Address rules The cascade managing address (parameter 184) must be set to ‘Managing’ on the managing boiler. The cascade depending addresses (parameter 184) must be set in a logical numbered order from 1: Dep. 1, Dep. -
Page 95: Cascade - Domestic Hot Water Settings
Cascade CH setpoint adaption When the system temperature is not high enough the setpoint for all boilers will be adjusted. The boiler setpoint will be increased when the system temperature drops below Cascade_Setpoint and decreased when it rises above Cascade_Setpoint temperature. Dependent Boiler The CH mode for the cascade is defined by the setting of the managing boiler. -
Page 96: Cascade - Power Balance Mode
15.2.7 C – P ASCADE OWER BALANCE MODE Several different power control modes can be selected to operate the cascade system. • Power mode 0: Power control disabled, each boiler modulates based on the system setpoint. • Power mode 1: Power control algorithm to have a minimum amount of boilers/boilers active. -
Page 97: Cascade Error Handling
Cascade Error handling 15.4.1 C ASCADE ROST PROTECTION Frost protection on a cascade is active on two levels 1. Frost protection for burner cascade The ‘frost protection’ function for a burner cascade is related to the boiler sensor temperatures. Reactions on the supply / return temperatures of the managing boiler are as follows: Cascade_Frost_Protection:... -
Page 98: System Test
SYSTEM TEST. For testing the system at fixed power rates, a system test can be activated via the Installer menu. Via the system test the boiler can be started without CH or DHW being present. The system test has priority. The following modes are available: System test mode Description... -
Page 99: Commissioning The Boiler
COMMISSIONING THE BOILER First: flushing the boiler with water After installation of the boiler the first step, before commissioning, is to flush the boiler and the whole heating installation with fresh water to remove pollution, debris and other materials that might cause a blocking. This must also be done with heating installations, where only the boiler is replaced. -
Page 100: Checking Gas Pressure
Checking gas pressure Check the gas pressure available at the gas connection pipe of the boiler. Use the pressure nipple [3] of the gas safety valve for this measurement. Picture 18-3 shows the position of the pressure nipple [3]. Min. and max. gas supply pressures: p nom [inch W.C./ mbar] p min [ inch W.C./ mbar] p max [ inch W.C./ mbar]... -
Page 101: Adjusting And Setting The Boiler
ADJUSTING AND SETTING THE BOILER Before carrying out any adjusting of the burner, carefully read this complete chapter. The initial lighting of the appliance must be performed by a licensed Gas Technician. Failure to follow these instructions may result in property damage, serious injury or death. As soon as the appliance has been fully installed (with regard to hydraulics, filling and de- aeration of installation, gas, flue gas, air intake, wiring etc.) according to the preliminary WARNING... -
Page 102: Setting Screws Venturi- And Gas Valves: Drawings
18.1.2 S ETTING SCREWS VENTURI AND GAS VALVES DRAWINGS Location of the setting screws: Gas pressure High Fire: nipple [3] screw [2] Low Fire: screw [1] Picture 18. 1 High Fire: venturi adjustment screw: use hex key 4 mm (5/32 Allen wrench) High Fire: screw [2] Picture 18. 2 Low Fire: gas valve adjustment screw: Torx T40. -
Page 103: Adjustment Procedures
Adjustment procedures Procedure 1: adjust at High Fire Carry out the next steps: 1. From status screen, press MENU . → "Central Heating/ Information/ Settings/ System Test" 2. Press UP/DOWN ↑↓ to select "System Test" 3. Press CONFIRM to activate the system test. →... -
Page 104: Conversion From Natural Gas To Propane
Conversion from natural gas to propane Conversion of the boiler to a different gas type must be performed by a certified technician. Parameter 138 must be set correctly! Wrong setting can lead to damage to the appliance or shorten the lifespan of the appliance! WARNING The warranty of the device will expire if a wrong selection has been made. - Page 105 4. Set parameter 138 Parameter 138 has to be changed in the software of the boiler according to the following table: NB: fan speed is given to verify. fan speed Parameter 138 Controller version Boiler model high fire for propane (LP) 299MBH Version VGH-299 6450...
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Page 106: Start Up Checklist
Serial number sales@slantfin.com or Installation date send a copy to address New boiler or replacement Slant/Fin Corp. Cascade installation (Y/N) (YES/NO) 100 Forest Drive Number of boilers Greenvale, NY 11548 Type of boilers in cascade... - Page 107 Water circulation & temperature regulation (for DHW) Piping diameter Total length of straight pipe between boiler & tank Number of elbows Number of tees Temperature rise between inlet and outlet after 5 min. cold-start operating max. power °C / °F Water temperature setpoint Test of Water Flow Switch (DHW)? (Yes/No)
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Page 108: Inspection, Maintenance And Service
INSPECTION, MAINTENANCE AND SERVICE. General For a good, safe and long-time 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. Inspection, maintenance and service of the boiler must also be carried out on the following occasions: ... -
Page 109: Nspection Maintenance And Service
AVOID Breathing Fiber Particulates and Dust Precautionary Measures: Do not remove or replace RCF parts or attempt any service work involving RCF without following the guidelines and wearing the following personal protective equipment outlined in the table (19.1) below: Avoid the Following ... - Page 110 During maintenance, the following items in bold listed below of the boiler must be checked and inspected. NOTICE: Before starting to work on the boiler: Switch off the electrical power to the boiler (service switch and/or unplug boiler) Close the gas valve to block gas supply to the boiler Customer comments Comments and remarks from the customer must be analyzed and used to find possible causes for any occurring...
- Page 111 1 = Seat check valve small 2 = Lock nut M5 DIN985 3 = Gasket gas air mixing 4 = check valve small Picture 19.2 Always check gaskets on non-return valve for air/gas leakage!! Burner Check the burner surface to see if it has damages, signs of rust and/or cracks. When the burner surface is damaged the burner must be replaced.
- Page 112 Warning Crystalline Silica – Read instructions of § 19.2 carefully Burner door thermostat Needed tool: Wrench 16 mm. This thermostat is activated if the temperature of the burner door has been too high. In this case, it has to be replaced (spare part). Replacement: - Disconnect the wiring and remove the thermostat.
- Page 113 Fiber braid replacement If the high temp braided rope is damaged and needs to be changed, it has to be replaced by new braids using the method described below. The high temp braided rope is maintained by silicone glue. - Remove electrodes. - Remove the braids by sliding under the periphery a thin tool to loosen the braids and remove it.
- Page 114 Warning Crystalline Silica – Read instructions of § 19.2 carefully Rear wall insulation disk; changing procedure: If the insulation disk has been degraded or damaged, it has to be replaced. - be sure the heat exchanger is cooled down, wait a few hours after burning. In this way, the protective film is not sticking anymore on the rear side of this insulation disk.
- Page 115 When the fan blades are polluted and dirty, carefully clean the blades with a soft brush. Notice: do not use too much force on the blades or else the fan might be out of balance and run irregularly, causing noises and fan failures.
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Page 116: Mounting The Burner Door
19.3.1 M OUNTING THE BURNER DOOR IMPORTANT: Before mounting the burner door, make sure that its gaskets and insulation are in excellent shape. If any signs of damage or ageing are present, these parts must be replaced. The burner door must be mounted back on the heat exchanger as follows: - Place the burner door with its holes over the six threaded studs. -
Page 117: Maintenance Checklist
Maintenance Checklist Allowing the boiler to operate with a dirty combustion chamber will hurt operation. Failure to clean the heat exchanger as required by the manual and dictated by the operating location could result in boiler failure, property damage, personal injury, or death. WARNING Such product failures ARE NOT covered under warranty Periodic maintenance must be performed once a year by a qualified service technician to assure that all the... -
Page 118: User Instructions
USER INSTRUCTIONS After installing and commissioning of the boiler, demonstrate the operation of the entire central heating system to the end-user. The user must be made familiar with all safety precautions of the boiler and the installation. The user must be instructed that service and maintenance of the boiler is required every twelve months. Regular service and maintenance is essential for a safe and proper operation of the boiler. - Page 119 System Example 3 Low Voltage Connections BOILER Name Wire terminal HEATING Room thermostat 12-13 ZONE outdoor temperature sensor System temperature sensor low loss header High Voltage Connections boiler circulator 4-PE-5 System heating circulator 6-PE-7 Figure 21-3 System Example 4 Low Voltage Connections Name Wire terminal BOILER...
- Page 120 System Example 5 Low Voltage Connections Name Wire terminal BOILER Room thermostat 12-13 HEATING ZONE System temperature sensor outdoor temperature sensor Tank thermostat or sensor low loss header DHW indirect Tank non-return valve (low resistance type) High Voltage Connections DHW indirect tank circulator 2-3-PE boiler circulator 4-PE-5...
- Page 121 System Example 7 BOILER 1 BOILER 2 BOILER 3 BOILER 4 depending 1 depending 2 depending 3 managing HEATING ZONE Low Voltage Connections Name Wire terminal Room thermostat 12-13 outdoor temperature sensor System temperature sensor non-return valve (low resistance type) low loss header High Voltage Connections boiler circulator...
- Page 122 System Example 8 BOILER 1 BOILER 2 BOILER 3 BOILER 4 managing depending 1 depending 2 depending 3 HEATING ZONE Low Voltage Connections Name Wire terminal Room thermostat 12-13 outdoor temperature sensor System temperature sensor Tank thermostat or sensor DHW indirect Tank non-return valve (low resistance type) low loss header High Voltage Connections...
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Page 123: Spare Parts
SPARE PARTS. Figure 22-1 E93.1601EN032.C VGH installation manual... - Page 124 Figure 22-2 E93.1601EN032.C VGH installation manual...
- Page 125 Slant/Fin POS. DESCRIPTION Part Number VGH 299 VGH 399 VGH 500 Automatic air vent with clip connection 81 7001 000 Locking clip air vent 81 7002 000 Rubber plug ø 15 81 7003 000 Ignition cable 81 7004 000 Gasket Burner & gas/air inlet pipe 81 7005 000 Gasket gas/air inlet pipe &...
- Page 126 Slant/Fin POS. DESCRIPTION Part Number VGH 299 VGH 399 VGH 500 Rear wall thermostat 100-180 (16 mm rear wall) 81 7052 000 O-ring 33.4x2 81 7053 000 Set round head screw M5x14 self-thread-cutting 81 7054 000 (5 pcs) Set. Venturi VMS L...
- Page 127 E93.1601EN032.C VGH installation manual...
- Page 128 ©Slant/Fin Corp. 2019 • 0519 • PUBLICATION VGH-40 SLANT/FIN CORPORATION, Greenvale, N.Y. 11548 • Phone: (516) 484-2600 FAX: (516) 484-5921 • Canada: Slant/Fin , Mississauga, Ontario LTD/LTEE www.slantfin.com...
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