Munchkin VWH High Efficiency Hot Water Supply Boiler Istruzioni per gli Interventi

HEAT TRANSFER PRODUCTS, INC.120 BRALEY RD., E. FREETOWN, MA 02717Installing, Operating & MaintainingMUNCHKIN VWH HIGH EFFICIENCYHOT WATER SUP

10GAS CONNECTIONPART 3. GAS CONNECTIONA. GAS CONNECTIONThe gas supply shall have a maximum inlet pressure of less than 14” water column (350 mm), ½ p

11GAS CONNECTIONIt is recommended that a soapy solution be used to detect leaks. Bubbles will appear on the pipe toindicate a leak is present. The gas

12VENTINGPART 4. VENTINGA. APPROVED VENTING MATERIALSEXHAUST VENTUse Plastic 3” and 4” and 6” Pipe Schedule 40 or 80.1. Non-Foam Core PVC Pipe2. Non-F

13VENTINGThe inlet pipe on the back of the cabinet is 3" for the 199 VWH and 4" for the 399 VWH. It is veryimportant that you plan the locat

14VENTINGRECOMMENDED VENTING CLEARANCES PER THE NATIONAL FUEL GAS CODE*All venting must be properly supported. The Munchkin is not intended to support

15The connection of air inlet and exhaust vent at the heater must remain 3” for 199VWH and 4” for399VWH and each vent must extend from the heater a mi

16VENTING3. If practical, close all building doors, windows and all doors between the space in which theappliance remains connected to the common vent

17VENTINGFigure 4-1: Sidewall Vent with Tee (Intake) &Coupling (Exhaust) for standard floorunits3” piping for 199VWH4” piping for 399VWH**IMPORTAN

18VENTINGDIAGRAMS FOR VERTICAL VENTINGFigure 4-5: Roof Vent with tee (intake) & coupling(exhaust) for standard floor units3” piping for 199VWH4” p

19PIPINGPART 5. PIPING THE MUNCHKIN VWH TO THE STORAGE TANKThe Munchkin is designed to be connected to a storage tank to supply domestic hot water. H

USING THIS MANUAL2USING THIS MANUALSPECIAL ATTENTION BOXES Throughout this manual you will see thesespecial attention boxes similar to this one,which

20PIPINGPiping Symbol Legendcirculator (open loop) (w/ isolation flanges)gate valveglobe valveball valveswing-check valvespring-loaded check valvehose

21PIPINGVolume Water Heatingusing Munchkin boiler(1 boiler supplying one storage tank)Drawing VWH 1/1flow switchexpansiontankASEE 1017 rated anti-scal

22PIPINGVolume Water Heatingusing Munchkin boiler(1 boiler supplying two storage tanks)flow switchexpansiontankASEE 1017 rated anti-scald valve(recomm

23PIPINGDrawing VWH 2/1 HVolume Water Heatingusing Munchkin boiler(2 boilers supplying one storage tank)NOTES:1. This drawing is meant to show syste

24PIPINGVolume Water Heatingusing Munchkin boiler(2 boilers supplying one storage tank)Drawing VWH 2/1 VNOTES:1. This drawing is meant to show syste

25PIPINGDrawing VWH2/2 HVolume Water Heatingusing Munchkin boilers(2 boilers supplying two storage tanks)NOTES:1. This drawing is meant to show syst

26PIPINGDrawing VWH2/2 VVolume Water Heatingusing Munchkin boilers(2 boilers supplying two storage tanks)NOTES:1. This drawing is meant to show syste

27PIPINGDrawing VWH 3/2 HVolume Water Heatingusing Munchkin boiler(3 boilers supplying two storage tanks)NOTES:1. This drawing is meant to show syste

28PIPINGDrawing VWH 3/2 VVolume Water Heatingusing Munchkin boiler(3 boilers supplying two storage tanks)NOTES:1. This drawing is meant to show syste

29START-UP PROCEDURESPART 6. START-UP PROCEDURES A. SEQUENCE OF OPERATION1. When power is first applied to the control, the control display will read

TABLE OF CONTENTS3TABLE OF CONTENTS PART 1 . . . . . . . . . . . . . . . . . . . . . .4 thru 8GENERAL INFORMATIONA How It Operates . . . . . . . . .

30C. LIGHTING INSTRUCTIONSFOR YOUR OWN SAFETY READ BEFORE OPERATING1. This appliance does not have pilot. It is equipped with an ignition device which

31F. STATUS MENUInstallers are also able to check the current status of the Munchkin parameters by pressing S4/Resetkey for 3 seconds. Once activated

32START-UP PROCEDURESH. TO TURN OFF GAS TO APPLIANCE1. Set the thermostat to lowest setting.2. Turn off all electric power to the appliance if service

MUNCHKIN 199VWH GAS VALVE MUNCHKIN 399VWH GAS VALVE START-UP PROCEDURES33Fig. 6-3THROTTLE ADJUSTER(NOTE: IF FOR ANY REASON THE THROTTLE NEEDS TO BE AD

34TROUBLESHOOTINGCAUTION This appliance has wire function labels on allinternal wiring. Observe the position of each wirebefore removing it. Wiring e

35TROUBLESHOOTINGTable 7-2: 925 Control Board FAULT CodesedoCnoitpircseDydemeR00F.dedeecxEtimiLhgiH.1.2.3noitarepopmupnoitalucrickcehCehtgnisseccaybre

36TROUBLESHOOTINGBoiler Resistance (ohms)32 3255041 2534050 1987059 1570068 1249077 1000086 805995 6535104 5330113 4372122 3605131 2989140 2490149 208

37MAINTENANCEPART 8. MAINTENANCEA. MAINTENANCE PROCEDURESPeriodic maintenance should be performed once a year by a qualified service technician to ass

38MAINTENANCEin which case, a qualified plumber will need to be contacted to follow the Coil Cleaning Instructions(Section D) included in this section

39MAINTENANCESTANDARD 925 CONTROL WIRING LAYOUT FOR 199VWHFig. 8-1925 CONTROL WIRING LAYOUT FOR 399VWHFig. 8-2E. MUNCHKIN CONTROLLERS

GENERAL INFORMATION4RECOMMENDED SERVICE CLEARANCESPART 1. GENERAL INFORMATIONA. HOW IT OPERATESThe Munchkin VWH is a hot water supply boiler designed

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LP-147 REV. 7/7/04

GENERAL INFORMATION5B. MUNCHKIN RATINGS AND DIMENSIONSMODEL INLET OUTLET RECOVERY RATEFIRST HOUR RATINGW/ 80 GAL. STORAGE TANKFIRST HOUR RATINGW/ 119

6GENERAL INFORMATIONDIMENSIONSFigure 1-2

GENERAL INFORMATION7GENERAL 1. Munchkin VWH is supplied completely assem-bled as a packaged boiler. The package shouldbe inspected for damage upon rec

8If the Munchkin is set up for liquefied petroleum (LP) gas, some geographic areas follow the UniformMechanical Code, section 304.6, “Liquefied petrol

9ELECTRICALPART 2. ELECTRICALA. ELECTRICAL CONNECTION The electrical connection for the Munchkin is on the left hand side of the unit. There is a ½” k