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Heat Transfer MODCON VWH 300 LP Installation & Maintenance

Gas-fired hot water supply boiler
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Installation Manual
Installation Manual
This manual must only be used by a qualified heating installer/service technician. Read all instructions
in this manual before installing. Perform steps in the order given. Failure to comply could result in
severe personal injury, death or substantial property damage.
NOTICE
Heat Transfer Products, Inc., reserves the right to make product changes or updates without
notice and will not be held liable for typographical errors in literature.
n
WARNING
• Installation
• Startup
• Maintenance
• Parts
Models
MODCON VWH 300 / LP / HL / LPHL
MODCON VWH 500 / LP / HL / LPHL
MODCON VWH 850 / LP / HL / LPHL

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Summary of Contents for Heat Transfer MODCON VWH 300 LP

  • Page 1 Perform steps in the order given. Failure to comply could result in severe personal injury, death or substantial property damage. NOTICE Heat Transfer Products, Inc., reserves the right to make product changes or updates without notice and will not be held liable for typographical errors in literature.
  • Page 2 Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER WARNING If the information in this manual is not followed Do not store or use gasoline or other flammable exactly, a fire or explosion may result causing vapors and liquids in the vicinity of this or any property damage, personal injury or loss of life.

  • Page 3: Table Of Contents

    Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER CONTENTS Part 1 – Product and Safety Information ........4 Part 2 –...
  • Page 4 Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER CONTENTS (CONT’D) Part 8 – Field Wiring............44-51 A.

  • Page 5: Part 1: Product And Safety Information

    Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 1: PRODUCT AND SAFETY INFORMATION SPECIAL ATTENTION BOXES The following defined terms are used throughout this manual to bring attention to the presence of hazards of various risk levels or to important information concerning the product. DEFINITIONS DANGER CAUTION...
  • Page 6 Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 1: PRODUCT AND SAFETY INFORMATION (CONT’D) WARNING CAUTION You must not have a direct connection of the Installer — Read all instructions in this manual, potable water system into the Mod Con VWH heat and Mod Con Venting section, before installing.

  • Page 7: Part 2: Before You Start

    Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 2: BEFORE YOU START MODCON RECOVERY RATINGS WATER FLOW AT VARIOUS TEMPERATURE RISE 20Δt 25Δt 30Δt 35Δt 40Δt 45Δt 50Δt 55Δt 60Δt 65Δt 70Δt 75Δt 80Δt 85Δt 90Δt 95Δt 100Δt 105Δt 110Δt 115Δt 120Δt 125Δt 130Δt 135Δt 140Δt Model RECOVERY RATE IN GALLONS PER HOUR BASED ON TEMPERATURE RISE BETWEEN INLET TEMPERATURE AND OUTLET TEMPERATURE ModCon 300 1,692 1,354 1,128 967...

  • Page 8: What's In The Box

    Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 2: BEFORE YOU START (CONT’D) Min Tank Size (gal.) = Required flow (GPM) x 10 = VWH Outlet Temp– 40  Mixing factor Total VWH Output x VWH Efficiency +.75 x Total Storage First Hour rating = (VWH Outlet Temp-40) x 8.31 Example:...

  • Page 9: Optional Equipment

    Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 2: BEFORE YOU START (CONT’D) The cascade system is capable of connecting is a high efficiency appliance, therefore the up to eight boilers together in such a way that boiler will produce condensate. The collection they function as one boiler system.

  • Page 10: Part 3: Prepare Boiler Location

    Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 3: PREPARE BOILER LOCATION Please read the entire manual as it could save A. BOILER LOCATION / DIMENSIONS time and money. Piping, Venting, Condensation Before considering the Boiler location, there are Removal are just a few issues that need to be addressed prior to the installation of the boiler.
  • Page 11 Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER DIMENSIONS FLOW SWITCH LEFT SIDE FRONT RIGHT SIDE (MOD CON 300) (ALL MODELS) (MOD CON 300) POWER SWITCH ACCESS PANEL DISPLAY PANEL HOT WATER ELECTRICAL BOX OUTLET GAS LINE LEGS ADJUST CONDENSATE 1-1/4"-3" DISCHARGE REAR LEFT SIDE...

  • Page 12: Installations Must Comply With

    Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 3: PREPARE BOILER LOCATION (CONTINUED) • Incorrectly-sized expansion tank. B. INSTALLATIONS MUST COMPLY WITH: • Boiler is located in a condition that could • Local, state, provincial, and national codes, cause the system and boiler to freeze and laws, regulations and ordinances.

  • Page 13: Exhaust Vent And Intake Air Vent

    Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 3: PREPARE BOILER LOCATION (CONTINUED) E. EXHAUST VENT AND INTAKE AIR VENT WARNING You must pipe outside air to the boiler air WARNING intake. Ensure that the intake air will not Vents must be properly supported. The Mod contain any of the contaminants below.

  • Page 14: When Removing A Boiler From An Existing Common Vent System

    Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 3: PREPARE BOILER LOCATION (CONTINUED) connected to the common venting system G. WHEN REMOVING A BOILER FROM AN are located and other spaces of the building. EXISTING COMMON VENT SYSTEM Turn on clothes dryers and any appliance not connected to the common venting system.

  • Page 15: Part 5: Boiler Piping

    Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 4: PREPARE BOILER (CONTINUED) enclosure. You can use either a solid ¾” in diameter black iron pipe or lift- ing straps to lift the boiler off of its shipping crate. You must have at least two individuals to handle the boiler properly to avoid damage as care should be taken as the Mod Con is...

  • Page 16: General Piping Information

    Allow for boiler, piping and storage tank: Heat Transfer Products has available storage tanks that are 80/119/175 gallon size storage Boiler Water Volume tanks constructed in either Stainless Steel or Glass lined construction.

  • Page 17: Installation Of Flow Switch

    Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 5: BOILER PIPING (CONTINUED) 2. Thread brass Tee into outlet nipple using pipe WARNING dope: Never use dielectric unions or galvanized steel fittings when connecting to a stainless steel storage tank or boiler. WARNING When raising tank temperature, you increase the risk of scalding –...
  • Page 18 Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 5: BOILER PIPING (CONTINUED) 5. Feed Green Ground Wire into Boiler through 8. Connect wire harness to the red wire the wire access: connection on the flow switch: 6. From the front of the boiler, feed the ground 9.

  • Page 19: Scalding

    Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 5: BOILER PIPING (CONTINUED) The following chart details the relationship of F. SCALDING water temperature and time with regard to scald This water heater can deliver scalding tempera- injury and may be used as a guide in determining ture water at any faucet in the system.
  • Page 20 Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 5: BOILER PIPING (CONTINUED) Fig. 5-1 below represents the combined flow rates Example: (5) Mod Con 300 Boilers with a design and pipe sizes when using multiple boilers to design of 30 degree temperature rise with each boiler the manifold system for the primary circuit.

  • Page 21: High Velocity Circulator Pump

    Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 5: BOILER PIPING (CONTINUED) Piping components G. HIGH VELOCITY CIRCULATOR PUMP Water heating system piping: Every VWH system requires special attention to the pump size in order to overcome the pres- Water heater system piping MUST be sized per sure drop through the boiler and its related pip- tech pipe requirements listed in Fig.

  • Page 22: Boiler Piping Details

    Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 5: BOILER PIPING (CONTINUED) H. BOILER PIPING DETAILS Piping Symbol Legend circulator (open loop) anti-scald rated (w/ isolation flanges) mixing valve flow switch pressure gauge gate valve pressure relief valve (or P&T relief valve) globe valve ball valve temperature /...
  • Page 23 Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 5: BOILER PIPING (CONTINUED)
  • Page 24 Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 5: BOILER PIPING (CONTINUED)
  • Page 25 Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 5: BOILER PIPING (CONTINUED)
  • Page 26 Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 5: BOILER PIPING (CONTINUED)
  • Page 27 Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 5: BOILER PIPING (CONTINUED) Drawing VWH 2/2 V MC Volume Water Heating using MOD CON boilers (2 boilers supplying 2 storage tanks) System/Pipe Sensor Used if sensor cannot be placed at tank – (Important to note that Pumps must be ASEE 1017 rated anti-scald valve wired to run continuously to operate in...
  • Page 28 Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 5: BOILER PIPING (CONTINUED)

  • Page 29: Part 6: Venting, Combustion Air & Condensate Removal

    Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 6: VENTING, COMBUSTION AIR & CONDENSATE REMOVAL A. INSTALLING EXHAUST VENT AND WARNING INTAKE AIR VENT Use only the materials listed in Tables 6-1 through 6-7 for the venting systems. Failure to DANGER do so could result in severe personal injury, death or substantial property damage.
  • Page 30 Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 6: VENTING, COMBUSTION AIR & CONDENSATE REMOVAL (CONTINUED) Table 6-1 APPROVED PLASTIC EXHAUST VENTING MATERIAL MATERIAL STANDARDS FOR INSTALLATION IN: UNITED STATES CANADA PVC SCHEDULE 40 / 80 ANSI /ASTM D1785 ULC S636** PVC -DWV ANSI /ASTM D2665 ULC-S636**...

  • Page 31: Exhaust Vent And Intake Air Vent Pipe Location

    Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 6: VENTING, COMBUSTION AIR & CONDENSATE REMOVAL (CONTINUED) intake of a direct-vent appliance. WARNING • Provide a minimum of 1 foot distance You must not use “B” Vent in an exhaust from any door, operable window, or application.
  • Page 32 The condensate from the boiler is slightly There is a ¾” sweat connection provided to acidic with a ph of 3.2 - 4.5 Heat Transfer connect the outlet of the collection system to Products recommends neutralizing the a drain or condensate pump.
  • Page 33 Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 6: VENTING, COMBUSTION AIR & CONDENSATE REMOVAL (CONTINUED) CONDENSATE OVERFLOW SWITCH NOTE: TO CLEAN OUT CONDENSATE COLLECTOR ;USE A WET VAC INSIDE THE OPEN PORT TO THE CONDENSATE COLLECTOR. THIS WILL HELP REMOVE ANY FOREIGN MATTER THAT MAY BLOCK THE CONDENSATE LINE.
  • Page 34 Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 6: VENTING, COMBUSTION AIR & CONDENSATE REMOVAL (CONTINUED) Location of exit terminals of mechanical draft and direct-vent venting systems. (Reference: National Fuel Gas Code ANSI Z223.1/NFPA 54 2002). Fig. 6-3 Multiple Vents Fig.

  • Page 35: Exhaust Vent And Intake Air Vent Sizing

    Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 6: VENTING, COMBUSTION AIR & CONDENSATE REMOVAL (CONTINUED) can be extended by increasing the diameter E. EXHAUST VENT AND INTAKE AIR VENT of both exhaust vent and intake air vent pipe SIZING equally.

  • Page 36: Heater Removal From A Common Vent System

    Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 6: VENTING, COMBUSTION AIR & CONDENSATE REMOVAL (CONTINUED) vent pipe. If the exhaust pipe must be piped is blockage, leakage, corrosion or other defi- around an obstacle that results in the creation ciencies that could cause an unsafe condition.

  • Page 37: Diagrams For Sidewall Venting

    Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 6: VENTING, COMBUSTION AIR & CONDENSATE REMOVAL (CONTINUED) I. DIAGRAMS FOR SIDEWALL VENTING TWO PIPE SIDEWALL VENTING W/TEE (INTAKE) TWO PIPE SIDEWALL VENTING AND COUPLING (EXHAUST) WITH V-SERIES KIT VENT KIT (SEE CHART) SUPPORT BRACKETS MUST BE USED ON ALL HORIZONTAL...

  • Page 38: Diagram For Vertical Venting

    Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 6: VENTING, COMBUSTION AIR & CONDENSATE REMOVAL (CONTINUED) J. DIAGRAM FOR VERTICAL VENTING TWO PIPE ROOF VENTING WITH TEE (INTAKE) AND COUPLING (EXHAUST) Fig. 6-10 Multiple Concentric Vent Spacing – Vertical Fig. 6-11 Multiple Concentric Vent Spacing –...
  • Page 39 Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 6: VENTING, COMBUSTION AIR & CONDENSATE REMOVAL (CONTINUED) DIAGRAM FOR HORIZONTAL VENTING 10’ 0" MIN. ROOF EXHAUST RAIN CAP - STAINLESS STEEL 4" Z-FLEX 2SVSRCF04 RIZONTAL VENTING 6" Z-FLEX 2SVSRC06 AIR INTAKE GALVANIZED/B-VENT 24"...

  • Page 40: Part 7: Gas Piping

    Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 7: GAS PIPING If the leak test requirement is a higher test pres- WARNING sure than the maximum inlet pressure, you must isolate the Mod Con from the gas line. In order Failure to follow all precautions in this section to do this, you must shut the gas off using fac- could result in fire, explosion or death!

  • Page 41: Gas Piping

    Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 7: GAS PIPING (CONTINUED) C. GAS TABLE Maximum Capacity of Pipe in Cubic Feet of Gas Refer to Table 7-1 to size the supply piping to per Hour for Gas Pressures of 0.5 w.c. or Less and minimize pressure drop between meter or a Pressure Drop of 0.3 Inch w.c.

  • Page 42: Dungs Gas Valve

    Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 7: GAS PIPING (CONTINUED) tor is used, it must be a minimum of 10 feet from NEW LP installations and also in empty tank sit- the Mod Con. It is very important that the gas uations.
  • Page 43 Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 7: GAS PIPING (CONTINUED) MOD CON 500 GAS VALVE THROTTLE ADJUSTER GAS PRESSURE NOTE: IF FOR ANY REASON THE THROTTLE SWITCH BLOCK NEEDS TO BE ADJUSTED, IT IS VERY IMPORTANT THAT A "COMBUSTION ANALYZER" BE USED TO ENSURE SAFE AND PROPER OPERATION.
  • Page 44 Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 7: GAS PIPING (CONTINUED) MOD CON 850 GAS VALVE THROTTLE ADJUSTER NOTE: IF FOR ANY REASON THE THROTTLE NEEDS TO BE ADJUSTED, IT IS VERY IMPORTANT THAT A COMBUSTION ANALYZER BE USED TO ENSURE SAFE AND PROPER OPERATION.

  • Page 45: Part 8: Field Wiring

    Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 8: FIELD WIRING be wired directly to the controller as shown fig- WARNING ures 8-1/8-3/8-4 or wired directly to line voltage for continuous operation. Only wire the circula- ELECTRICAL SHOCK HAZARD — For your tor pump to the controller if a Tank Sensor or safety, turn off electrical power supply at service Mechanical control can be mounted to the stor-...

  • Page 46: Line Voltage Wiring For Modcon Vwh

    Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 8: FIELD WIRING (CONTINUED) the tank(s) from the boilers as close to the normal operation and the circuit between tank(s) as possible. The purpose of this sensor is ALARM COM and NO is open during normal to serve as feedback to the control to provide it operation.
  • Page 47 Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 8: FIELD WIRING (CONTINUED) MOD CON VWH CONTROL Fig. 8-1 LP-248-VWH Rev. 7/17/09...

  • Page 48: Tank Sensor Or Mechanical Control

    Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 8: FIELD WIRING (CONTINUED) used, it should be installed on the outlet side G TANK SENSOR OR MECHANICAL of the gas valve. This is normally closed and CONTROL will open if the pressure goes above 1.5” w.c. Connect the tank sensor or mechanical controls on the outlet side.

  • Page 49: Wiring Of Cascade System Communication Bus

    Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 8: FIELD WIRING (CONTINUED) running communication cables parallel and L. WIRING OF CASCADE SYSTEM close to or against high voltage (120 volt or COMMUNICATION BUS greater) wiring. HTP recommends that the 1. Use standard CAT3 or CAT5 computer maximum length of communication bus network patch cables to connect the cables not exceed 200 feet.

  • Page 50: Modcon Vwh Cascade Master Pump And Sensor Wiring

    Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 8: FIELD WIRING (CONTINUED) MOD CON VWH Cascade Master NOTE: You must place the Cascade Master label (included in shipping envelope) on top of the Standard Mod Con Control Fig. 8-3 LP-248-VWH Rev. 7/17/09 3.

  • Page 51: Modcon Vwh Cascade Follower Pump And Sensor Wiring

    Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 8: FIELD WIRING (CONTINUED) MOD CON VWH Cascade Follower Fig. 8-4 LP-248-VWH Rev. 7/10/09 follower boilers in the system. N. MODCON VWH CASCADE FOLLOWER PUMP AND SENSOR WIRING 3. Do not connect anything to the OUTDOOR SENS, 0-10V or THERMOSTAT terminals.
  • Page 52 Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 8: FIELD WIRING (CONTINUED) Fig. 8-5 LP-255 Rev. 11/09/09...
  • Page 53 Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 9. START-UP OPERATION munication bus to see if any other boilers are A. SINGLE MOD CON VWH BOILER present and if there are boilers present, the mas- When power is applied to the MODCON VWH ter control determines their boiler address.

  • Page 54: Part 9. Start-Up Preparation

    E03 fault code indi- you must use a condensate removal pump, cating that the supply sensor has failed. available from Heat Transfer Products (#554200). This pump is equipped with two C. CHECK FOR GAS LEAKS...
  • Page 55 Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 9. START-UP PREPARATION (CONTINUED) 5. Change parameter 23 from 0 to 1. This makes it the master boiler. 6. Exit the installer menu NOTE: The temperature set point of the master must match the follower boiler set point in order for the system to operate properly.

  • Page 56: Part 10. Start-Up Procedure

    Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 10. START-UP PROCEDURE FOR YOUR OWN SAFETY READ 3. On the intial start-up of this boiler, you may note a lock-out code of |F01|. This is a low gas BEFORE OPERATING pressure switch lock-out from the factory- 1.

  • Page 57: Status Menu

    Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 10. START-UP PROCEDURE (CONTINUED) Set Point Adjustment DANGER Default Range of Function Display Water temperature over 125 Setting Adjustment degrees F. can cause severe Supply Sensor 7° F 1–45° F burns instantly, or death from Differential scalds.

  • Page 58: Test Mode

    Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 10. START-UP PROCEDURE (CONTINUED) Function Value Follower Boiler #7 – P7 alternating (0-100 Percentage firing rate d12/ Power on in hours (display will not read until 100 hrs.) NOTE: If you toggle beyond parameters of con- Example : Display number x 1000 = nected boilers, the display will go into the next Power on Hours...

  • Page 59: Program Navigation

    Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 11: START-UP PROCEDURES FOR THE INSTALLER (CONTINUED) to normal operation. If the code is entered cor- Function Default Function Number Value Description rectly, the control will switch off the gas valve and purge fan while showing a solid |---| in the dis- N/A (No change required) play.
  • Page 60 Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 11: START-UP PROCEDURES FOR THE INSTALLER (CONTINUED) Function Default Function CONTROL PROGRAM REFERENCE CHART Number Value Description Function Default Setting Programmed Setting Cascade configuration default 0. No change allowed Change this to 1 if the boiler is in 149°F No change required a cascade system.

  • Page 61: Part 12: Troubleshooting

    Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 12: TROUBLESHOOTING A. MOD CON ERROR CODE C. BOILER FAULT 1. When a fault condition occurs the controller If any of the sensors detect an abnormal condi- will illuminate the red “fault” indication light tion or an internal component fails during the and display a fault code in the format.
  • Page 62 Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 12: TROUBLESHOOTING (CONTINUED) DANGER CAUTION When servicing or replacing components that are in This appliance has wire function labels on all internal direct contact with the boiler water, be certain that: wiring. Observe the position of each wire before re- •...
  • Page 63 Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 12: TROUBLESHOOTING (CONTINUED) Table 12-2: 926 Control Board FAULT Codes Code Description Remedy 1. Check circulation pump operation 2. Assure that there is adequate flow through the boiler by accessing the status menu and assuring that there is High Temperature Limit less than a 50°F rise from the return thermistor to the supply thermistor.

  • Page 64: Part 13: Maintenance

    Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 12: TROUBLESHOOTING (CONTINUED) Resistance Table System/Pipe Sensor Temperature Sensor 7250P-324 Boiler Sensor (7250P-667) Indirect/Tank Sensor (72 50P-325) Water Temperature (°F) Resistance (ohms) 32550 25340 19870 NOTE: If receiving 15700 an F09 fault code, 12490 c h e c k t h e g a p 10000...

  • Page 65: Combustion Chamber Coil Cleaning Instructions For The Mod Con

    Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 13: MAINTENANCE (CONTINUED) b. Disconnect the condensate piping from WARNING the outside connection, (not from the Mod Con Boiler side), so the flow from The combustion chamber insulation in condensate reservoir can be observed. this product contains ceramic fiber c.

  • Page 66: Maintenance Procedure To Clean Heat Exchanger

    Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 13: MAINTENANCE (CONTINUED) d. Replace and tighten the (6) 10MM nuts to C. MAINTENANCE PROCEDURE TO CLEAN the burner plate using staggered tighten- HEAT EXCHANGER: ing sequence. (See detail) 1. Shut off power to the boiler. 2.
  • Page 67 Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 13: MAINTENANCE (CONTINUED) MOD CON 300 VWH LP-205-A Fig. 13-1 REV. 8/24/09...
  • Page 68 Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 13: MAINTENANCE (CONTINUED) MOD CON 500 VWH LP-205-V Fig. 13-2 REV. 8/24/09...
  • Page 69 Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 13: MAINTENANCE (CONTINUED) MOD CON 850 VWH LP-205-S Fig. 13-3 REV. 6/5/08...
  • Page 70 Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 13: MAINTENANCE (CONTINUED) MOD CON MOD CON MOD CON ITEM DESCRIPTION 300VWH* 500VWH* 850VWH* 7500P-033 7500P-033 7500P-033 ECO HIGH LIMIT SENSOR(W/O-RING) 7500P-100 7500P-100 7500P-100 O-RING-ECO HIGH LIMIT SENSOR 7250P-059 7250P-059 7250P-059 THERMISTOR -SYSTEM SUPPLY 7250P-667 7350P-667 7350P-667...
  • Page 71 Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER PART 13: MAINTENANCE (CONTINUED) Item No MOD CON 300 VWH* MOD CON 500 VWH* MOD CON 850 VWH* Description 7350P-039 7350P-040 7350P-041 MOD CON FRAME 7350P-092 7250P-092 7350P-092 LEVELING FOOT SUPPORT 7250P-673 7250P-673 7250P-673 LEVELING FEET KIT 7350P-067...
  • Page 72 Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER...
  • Page 73 Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER...
  • Page 74 Boiler Manual GAS-FIRED HOT WATER SUPPLY BOILER...
  • Page 75 LP-172 REV. 2/16/06...
  • Page 76 LP-172 REV. 2/16/06...
  • Page 77 MAINTENANCE NOTES...
  • Page 78 MAINTENANCE NOTES...
  • Page 79 MAINTENANCE NOTES...
  • Page 80 © 2003–2009 Heat Transfer Products, Inc. www.HTproducts.com LP-276 REV. 11/25/09...

This manual is also suitable for:

Modcon vwh 300 hlModcon vwh 500 lpModcon vwh 500 hlModcon vwh 500 lphlModcon vwh 300 lphlModcon vwh 850 lp ... Show all

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