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LOCHINVAR CORPORATION
300 MADDOX SIMPSON PKWY
LEBANON, TN 37090
www.lochinvar.com

Designer’s Guide / Power-fin Water Heater

Chapter 1 – Combustion and
Ventilation Air

Everybody’s gotta breathe. Even water heaters need air. Air seems easy enough. You stand in
the equipment room and you breathe comfortably

, don’t you? Open a door. Open a window.

This is a big room. There’s lots of air in here for the water heater.

The average person inhales 400 to 500 cubic feet of air in a 24 hour period. A one million Btu/hr
water heater will draw 226.38 cubic feet of air every MINUTE! A 20 by 20 by 8 foot equipment
room

holds 3200 cubic feet of air. That’s a volume of air to last you or me over six days. A one

million Btu/hr Power-fin will consume 3200 cubic feet of air in 14 minutes.

Therefore, a good, easy flow of clean air is 100% necessary for clean, efficient combustion. So,
we need to provide a permanent and uninterrupted flow of air to the water heater. The Power-fin
water heater is designed to receive combustion air by one of TWO methods. The water heater
may draw combustion air from the room or have the air ducted directly to the water heater from
an exterior space.

This chapter

explains the methods for “air from the room”.

Chapter 2

explains “air ducted directly to the water

heater

”. Again, this chapter lists several techniques to

size the air openings that will deliver room air. If there are
other appliances in the room requiring air, their air
requirements must be including when sizing the air
openings.

Provisions for combustion and ventilation air must be
designed and installed in accordance with

“Air for

Combustion and Ventilation

”, of the latest edition of the National Fuel Gas Code, ANSI Z223.1, (in

Canada, the latest edition of CGA Standard B149 Installation Code for Gas Burning Appliances
and Equipment) or applicable provisions of the local building codes.

NEGATIVE PRESSURE IN THE EQUIPMENT ROOM

It is important to NEVER have a negative pressure on the equipment room. Exhaust fans are
popular in equipment rooms to exchange the air. If the exhaust fan pulls air OUT, then a negative
pressure occurs in the room. The combustion and ventilation air must be sized to supply all the
equipment PLUS the air for the exhaust fan.

COMBUSTION AND VENTILATION AIR SIZING CALCULATIONS

The sizing calculations in this section are based on “Free Area”. The louvers or grill used on the
air openings must have a net free area equal to or greater than the value derived in the
calculations. The Free Area in a louver or grill is defined as the open, unblocked area. The
louvers, grills, mesh, blades, all will block a given amount of space in the

louver’s overall

dimension. Consult the louver manufacturer for exact net free area of the louver.

Air

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Содержание Power-Fin

Страница 1: ...H I G H E F F I C I E N C Y C O M M E R C I A L B O I L E R S www Lochinvar com D E S I G N E R S G U I D E P O W E R F I N W A T E R H E A T E R Up to 87 Thermal Efficiency ...

Страница 2: ...has been organized and presented in a succinct easy to use manner so you can use and share information conﬁdently and with minimal effort However it is important to remember that this guide is not intended to replace our installation manual Installers should refer to our installation manual for speciﬁc installation instructions and more detail This guide will make regular reference to other docume...

Страница 3: ...ON TN 37090 www lochinvar com Designer s Guide Power fin Water Heater 1 2 3 4 5 6 7 8 Table of Contents Combustion Air Page 5 Venting Page 8 Gas Page 21 Water Page 23 Electricity Controls Page 29 Other Details Page 33 Appendix A Page 36 Appendix B Page 41 ...

Страница 4: ...system requirements that match the Power fin water heater to assure safe operation highly efficient heating and long life There are five major elements of domestic water heating system design Combustion Air See page 5 Venting See page 8 Gas See page 21 Water See page 23 Electricity Controls See page 29 Plus many other important details Locations Available Options See page 34 for Location of Unit S...

Страница 5: ... water heater Again this chapter lists several techniques to size the air openings that will deliver room air If there are other appliances in the room requiring air their air requirements must be including when sizing the air openings Provisions for combustion and ventilation air must be designed and installed in accordance with Air for Combustion and Ventilation of the latest edition of the Nati...

Страница 6: ... kW This opening must be located within 12 30 cm of the top of the enclosure 2 COMBUSTION AIR THROUGH DUCTS If combustion and ventilation air is taken from the outdoors using a duct to deliver the air to the equipment room each of the two openings should be sized based on a minimum free area of one square inch per 2000 Btu hr 11 cm per kW of input 3 COMBUSTION AIR FROM INTERIOR SPACE If air is tak...

Страница 7: ...e Power fin has a built in air filter as standard equipment Located at the combustion air inlet the air filter is provided to help ensure clean air is used for the combustion process The filter size on models 502 1302 is 16 x 12 x 1 40 6 cm x 30 4 cm x 2 5 cm and on models 1501 2001 is 16 x 16 x 1 40 6 cm x 40 6 cm x 2 5 cm You can find these commercially available filters at any home center or pl...

Страница 8: ...pment Room Category IV only Sidewall Vent with Air from the Rooftop Category IV only Sidewall Vent with Air from the Sidewall Category IV only That s a lot of choices Plus there is an important new consideration about specifying the correct Firing Code Allow me to overexplain Part 1 Vent Categories Here is the traditional vent category diagram standard throughout the industry Lochinvar offers twel...

Страница 9: ...wer fin Again easy Depending upon the model the Power fin will be factory trimmed for a small vent connection to positive vent or a large vent connection to non positive vent This is explained further in Part 2 Firing Code Part 2 Firing Codes The model number for all Lochinvar products has a Firing Code Example PFN0752PM M9 PFN0752PM is the basic model number M9 is the Firing Code This collection ...

Страница 10: ... Pressure M9 models are Category IV Part 3 Choose your vent configuration Now that you know your vent category and the matching Firing Code it s time to choose the vent configuration or system layout Let s start with Category IV venting Category IV Venting This is likely to be the most common because it offers modulation and it offers the largest variety of vent configurations All six layouts list...

Страница 11: ...sions to properly collect and dispose of any condensate that may occur in the vent pipe All vent material for this configuration including vent termination will be obtained locally The air is delivered to the equipment room by means defined in Chapter 1 of this designer s guide Maximum distance 50 equivalent feet of vent The Category IV Power fin with a model number that features the M9 Modulating...

Страница 12: ...lect and dispose of any condensate that may occur in the vent pipe All other vent material for this configuration Including vent termination will be obtained locally The air is delivered to the appliance via a separate duct The air intake material can be galvanized pipe PVC CPVC or ABS and must be sealed airtight Maximum distance 50 equivalent feet of vent Maximum distance 50 equivalent feet of ai...

Страница 13: ...t part numbers All other vent material for this configuration will be obtained locally The air is delivered to the appliance via a separate duct The air intake material can be galvanized pipe PVC CPVC or ABS and must be sealed airtight Maximum distance 50 equivalent feet of vent Maximum distance 50 equivalent feet of air intake The Category IV Power fin with a model number that features the M9 Mod...

Страница 14: ... must be provided by Lochinvar See table below for kit part numbers All other vent material for this configuration will be obtained locally The air is delivered to the equipment room by means defined in Chapter 1 of this designer s guide Maximum distance 50 equivalent feet of vent The Category IV Power fin with a model number that features the M9 Modulating Fire Firing Code will be factory trimmed...

Страница 15: ...provided by Lochinvar See table below for kit part numbers All other vent material for this configuration will be obtained locally The air is delivered to the appliance via a separate duct The air intake material can be galvanized pipe PVC CPVC or ABS and must be sealed airtight Maximum distance 50 equivalent feet of vent Maximum distance 50 equivalent feet of air intake The Category IV Power fin ...

Страница 16: ...ble below for kit part numbers All other vent material for this configuration will be obtained locally The air is delivered to the appliance via a separate duct The air intake material can be galvanized steel pipe PVC CPVC or ABS and must be sealed airtight Maximum distance 50 equivalent feet of vent Maximum distance 50 equivalent feet of air intake The Category IV Power fin with a model number th...

Страница 17: ...densing stack because of the potential for low Btu hr input and corresponding low stack temperature This changes the vent Category from IV to II Of the six layouts listed on page 8 three can be installed as Category II venting Notice that only vertical termination is permissible with Category II venting Vertical Vent with Air from the Equipment Room Category II Vertical Vent with Air from the Roof...

Страница 18: ... OR B9 FIRING CODE VERTICAL VENT WITH COMBUSTION AIR FROM EQUIPMENT ROOM The flue outlet terminates on the rooftop The combustion air is drawn naturally from the equipment room BULLET POINTS Category I double wall B vent is required All vent material for this configuration including vent termination will be obtained locally The air is delivered to the equipment room by means defined in Chapter 1 A...

Страница 19: ...air is delivered to the appliance via a separate duct The air intake material can be PVC CPVC or ABS galvanized steel pipe double wall B vent etc A field supplied barometric damper is optional on Power fin 0502 1302 F9 A field supplied barometric damper MUST be installed on Power fin 1501 2001 B9 Maximum distance 50 equivalent feet of air intake The Category I Power fin with a model number that fe...

Страница 20: ...VC CPVC or ABS galvanized steel pipe double wall B vent etc A field supplied barometric damper is optional on Power fin 0502 1302 F9 A field supplied barometric damper MUST be installed on Power fin 1501 2001 B9 Maximum distance 50 equivalent feet of air intake The Category I Power fin with a model number that features the F9 or B9 Firing Code will be factory trimmed for Category I vent and air in...

Страница 21: ...5 150 175 200 3 4 369 256 205 174 155 141 128 121 113 106 95 86 79 74 1 697 477 384 328 292 267 246 256 210 200 179 164 149 138 1 1 4 1 400 974 789 677 595 543 502 472 441 410 369 333 308 287 1 1 2 2 150 1 500 1 210 1 020 923 830 769 707 666 636 564 513 472 441 2 4 100 2 820 2 260 1 950 1 720 1 560 1 440 1 330 1 250 1 180 1 100 974 871 820 2 1 2 6 460 4 460 3 610 3 100 2 720 2 460 2 310 2 100 2 00...

Страница 22: ...that is noted on your design specification Example the model number changes from PFN0502PM M9 to PFL0502PM M9 from natural to L P gas The Power fin must be factory trimmed for the chosen gas type and may not be field converted from Natural to L P gas or vice versa GAS PRESSURE REGULATORS Lochinvar recommends the use of Lock Up Type gas pressure regulators on the system gas supply A Lock Up Type ga...

Страница 23: ...A factory supplied circulation pump creates the flow in this water heater loop only A system loop carries hot water away from the tank and the building return line is connected to the water heater loop A field supplied circulation pump will create the flow in the system loop IMPORTANT BULLET POINTS FOR WATER PIPING 1 Water Connections All models have 2 1 2 inch copper sweat pipe inlet and outlet c...

Страница 24: ...aving multiple water heaters is you have multiple pumps multiple pumps that share common piping When that happens the pipe diameters MUST be increased to accommodate the increased flow Here are the common manifold pipe sizes and the combined flow rates for the Power fin product family Power fin 0502 0752 1002 1302 Power fin 1501 1701 2001 Number of Combined Common Manifold Number of Combined Commo...

Страница 25: ... forces the appliance to operate outside any one of the three comfort zones it suffers WATER FLOW The flow rate concept is easy The water MUST flow through the Power fin at a specified flow rate Period The specified flow rate for the Power fin 502 1302 models is 75 GPM The specified flow rate for the Power fin 1501 2001 models is 90 GPM The idea behind flow rate is to avoid lime scale buildup All ...

Страница 26: ... not warrantable either Temperature Rise Chart Temperature Rise Chart Copper Heat Exchanger Copper Nickel Heat Exchanger Model Temperature Model Temperature Number Rise F Number Rise F PFN0502PM 11 PFN0502PM 9 PFN0752PM 17 PFN0752PM 14 PFN1002PM 23 PFN1002PM 18 PFN1302PM 30 PFN1302PM 24 PFN1501PM 28 PFN1501PM 22 PFN1701PM 32 PFN1701PM 26 PFN2001PM 38 PFN2001PM 30 COPPER NICKEL HEAT EXCHANGERS Thes...

Страница 27: ...ensate will occur on the outside of the copper finned tube and in between the fins The condensate will collect particles from the flue products The moisture and particles build up over time and ultimately will clog the fins This leads to improper combustion sooting elevated temperatures and premature failure of the heat exchanger Since the water flowing into the water heater comes directly from th...

Страница 28: ...rage tank MUST be installed Even then systems are often designed to rely primarily on the Power fin heating capacity to carry the system demand with a very small storage tank acting as a buffer This can work but logically it is possible to undersize the tank When that happens the Power fin water heater suffers too low an inlet water temperature and the heat exchanger will condense Here s a basic c...

Страница 29: ...tion AMP DRAW DATA Btu Hr Blowers Pump Total Amps Input Controls FLA 120 VAC PFN0502 6 7 8 8 15 5 PFN0752 6 7 8 8 15 5 PFN1002 6 7 8 8 15 5 PFN1302 6 7 8 8 15 5 PFN1501 6 5 8 8 15 3 PFN1701 6 5 8 8 15 3 PFN2001 6 5 8 8 15 3 SMART SYSTEM CONTROLS The Power fin features the Smart System control The Smart System control is designed to operate all the various elements of domestic hot water heating sys...

Страница 30: ...n of the Main Burner LOW VOLTAGE TERMINAL BOARD Every Power fin is equipped with a Low Voltage Terminal Board for a variety of other field connections and control features Tank Sensor or Tank Thermostat The Smart System control will operate the water heater based on a signal from a tank sensor with a resistance signal or a tank thermostat with an enable disable signal Louver Contacts The Smart Sys...

Страница 31: ... System control automatically monitors the water temperatures and will operate the pump and if necessary fire the appliance to protect the heat exchanger from freezing Inlet Water Temperature The Smart System will monitor inlet water temperature and report persistent flow of water less than 130 F which will cause condensation in the heat exchanger Anti Cycling The Smart System control will monitor...

Страница 32: ...emperature Rise Limiting Outlet Temperature Limiting High Limit Operation Low Voltage Blocking Low Water Cutoff Protection PC SOFTWARE All of these features are built into the Smart System control standard on every model To help you see them better Lochinvar offers PC Software The PC software program can be downloaded onto a laptop computer and with the connection cable provided in the PC Software...

Страница 33: ...ents In the absence of local codes U S installations shall conform to the latest edition of the National Fuel Gas Code ANSI Z223 1 In Canada the installation must comply with the Canadian Gas Association Code CAN CGA B149 1 and or B149 2 and or local codes CSA International CSA International ASME Section IV Blue Star for United States Blue Flame for Canada HLW stamp Water Heaters OPTIONAL CODES AD...

Страница 34: ... combustible surfaces 4 The appliance must be installed indoors where it is protected from exposure to wind rain and weather 5 This appliance may condense the products of combustion if operated at water temperatures below 140 F 60 C Ensure that the appliance is located near an acceptable drain where condensate that may form in the venting system can be properly collected and disposed 6 Access to t...

Страница 35: ... the call for heat should high gas pressure be sensed in the gas line The Low Gas Switch will interrupt the call for heat if the gas pressure supplied to the appliance is too low to achieve a safe burner flame Both switches require manual reset to restart the appliance The High and Low Gas Pressure Switches with Manual Reset is part of the Factory Mutual GE Gap or CSD1 option packages Per CSD 1 s ...

Страница 36: ...36 LOCHINVAR CORPORATION 300 MADDOX SIMPSON PKWY LEBANON TN 37090 www lochinvar com Designer s Guide Power fin Water Heater Appendix A Water Heater Piping Diagrams ...

Страница 37: ... com Designer s Guide Power fin Water Heater PAGE A1 SINGLE HEATER SINGLE TANK The illustration is for concept only and should not be used for actual installation without engineering or technical advice from a licensed engineer All necessary system equipment may not be illustrated ...

Страница 38: ...er s Guide Power fin Water Heater PAGE A2 TWO HEATER ONE TANK WITH COMMON MANIFOLD PIPING The illustration is for concept only and should not be used for actual installation without engineering or technical advice from a licensed engineer All necessary system equipment may not be illustrated ...

Страница 39: ...r Heater PAGE A3 TWO HEATER TWO TANK WITH COMMON MANIFOLD PIPING The illustration is for concept only and should not be used for actual installation without engineering or technical advice from a licensed engineer All necessary system equipment may not be illustrated See page 24 for Common Manifold Pipe Size Tables ...

Страница 40: ...er s Guide Power fin Water Heater PAGE A4 TWO TEMPERATURE SYSTEM WITH 3 WAY MIXING VALVE The illustration is for concept only and should not be used for actual installation without engineering or technical advice from a licensed engineer All necessary system equipment may not be illustrated ...

Страница 41: ...41 LOCHINVAR CORPORATION 300 MADDOX SIMPSON PKWY LEBANON TN 37090 www lochinvar com Designer s Guide Power fin Water Heater Appendix B Technical Data and Water Heater Component Breakdown ...

Страница 42: ...er temperature If selected as the controlling sensor the appliance will maintain set point by adjusting the firing rate of the unit according to this sensor 9 Temperature and pressure gauge The temperature and pressure gauge monitors the outlet temperature of the appliance as well as the system water pressure 10 Electronic display The electronic display consists of 7 buttons and a dual line 32 cha...

Страница 43: ...alve 24 High limit sensor A device that monitors the outlet water temperature to ensure safe operation If the temperature exceeds its setting field adjustable it will break the control circuit shutting the appliance down 25 Relief valve The relief valve is a safety device that ensures the maximum pressure of the appliance is not exceeded Water heaters receive 150 PSI Temperature Pressure relief va...

Страница 44: ...SIMPSON PKWY LEBANON TN 37090 www lochinvar com Designer s Guide Power fin Water Heater Power fin 0502 1302 Model 0502 1302 Front View Model 0502 1302 Rear View Model 0502 1302 Right Side inside view Model 0502 1302 Left Side inside view ...

Страница 45: ...SIMPSON PKWY LEBANON TN 37090 www lochinvar com Designer s Guide Power fin Water Heater Power fin 1501 2001 Model 1501 2001 Front View Model 1501 2001 Rear View Model 1501 2001 Right Side inside view Model 1501 2001 Left Side inside view ...

Страница 46: ... Power fin webpage From the home page click the Water Heaters button on the left side of the page On the next page click Better Idea Split System This takes you to a new page listing all the Lochinvar product families Click on the Power fin in the top row In this Power fin webpage you will be able to download the Installation Manual the Service Manual the Power fin Brochure Piping Diagrams Plan Vi...

Страница 47: ...NOTES ...

Страница 48: ...PF DG 05 Revised PF DG 05 2 09 2 10 Printed in U S A 300 Maddox Simpson Parkway Lebanon TN 37090 615 889 8900 fax 615 547 1000 w w w Lochinvar com ...

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