Hubbell Water Heaters - Model F High Capacity Instantaneous Steam Fired Water Heater

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The Hubbell F Model is a compact, highly efficient, packaged instantaneous steam fired water heater perfect for new or replacement water heating requirements. This highly efficient Hubbell heater requires no large storage tank, is easily installed and requires minimal floor space.

Category: indirect-fired water heaters | instantaneous water heaters | water heaters...

MasterFormat: Plumbing Equipment | Domestic Water Heat Exchangers



Hubbell Water Heaters
45 Seymour Street
P.O. Box 288
Stratford, CT 06615
Tel: (203) 378-2659
Fax: (203) 378-3593

info@hubbellheaters.com

http://www.hubbellheaters.com/

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Overview


Model F High Capacity Instantaneous Steam Fired Water Heater

The Hubbell F Model is a compact, highly efficient, packaged instantaneous steam fired water heater perfect for new or replacement water heating requirements. This highly efficient Hubbell heater requires no large storage tank, is easily installed and requires minimal floor space. Furthermore, the Hubbell F model utilizes a helical coil as its source for heat transfer and is up to 40% more efficient than traditional "U" tube heaters. When you specify and install a Hubbell steam fired water heater, you will have confidence in knowing the owner will be provided with a long lasting, trouble-free source for hot water.


Compact High Capacity Design
  • On demand water heater eliminates the need for a large storage tank
  • Advanced design requires only 7 Sq.Ft. of floor space
  • All steam controls are located within the steel frame
Packaged System
  • Water heater is factory assembled on an all welded steel mounting frame to save time and money during installation
  • All steam operating controls are factory selected, sized and piped
  • Ready for water and steam service connections
Heavy Duty Construction
  • Heat exchanger is ASME Section VIII stamped and registered with the National Board
  • Factory fitted protective shroud covers the heat exchanger for improved safety
High Efficiency
  • Helical coil design is up to 40% more efficient than traditional "U" tube coils
  • No standby heat loss
  • Feed forward blending valve controls hot water +/- 4°F
Spiral Design Heat Exchanger

The heart of the Hubbell Instantaneous Steam fired water heater is a compact, highly efficient and versatile spiral tube heating coil which offers many advantages over a conventional "U" tube design including:

  • 100% counterflow for heat-transfer rates up to 40% greater than equivalent stright tube exchangers.
  • Pressure drop is minimized.
  • Bourdon tube configuration that allows entire assembly to expand and contract without localized stresses. Failure from thermal shock or mechanical process is rare.
  • No baffles.
  • ASME Section VIII UM standard.
  • Variety of materials available to suit specific applications.
  • Compact design for easy maintenance.
  • Parts in stock to prevent long and expensive down times.
Blending Valve

The temperature regulating device in a Hubbell Instantenous Steam water heater is a "feed forward" blending valve design to assure safe and accurate temperature control of the heated water for an entire range of flow capacities. A purely mechanical operation, the Hubbell blending valve will provide +/- 4°F temperature control without the use of thermostatic sensing devices.
How the blending valve works

  1. The proportioning valve plug is constructed from Hastelloy C and is regulated by movement of the neoprene diaphragm, induced by pressure differentials in the sensing head.
  2. A sensing line "loads" the top portion of the diaphragm with supply line cold water pressure while blended water outlet pressure is being sensed below.
  3. Flow demand imparts a pressure imbalance above (+) and below (-) the diaphragm resulting in movement of the diaphragm and proportioning plug.
  4. The movement aligns ports in the plug with supply ports in the valve body, introducing the correct proportion of hot and cold water.
  5. This action automatically generates blended hot water through all rated flow capacities at the chosen preset temperature (+/- 4°F).
The integral fail-safe system permits steam travel in the event of plug restriction or parts failure, opening an auxiliary cold water port. Cold water flooding yields cooler water, or when parts fail, no water at all.
Temperature is easily adjusted by side-to-side movement of the control rod on the valve body. Stabilization adjustments are made during initial start-up by rotation of the control rod. All settings are locked in with a locking ring and set screw.

  1. Cold Water enters via the inlet piping and branches off to supply both the cold port on the blending valve and the heat exchanger.
  2. The cold water passes throught the coils in the heat exchanger and is heated by the surrounding steam in the shell.
  3. Hot water exits the heat exchanger and enters the hot port on the blending valve.
  4. The plug assembly in the blending valve opens the hot and cold ports to provide the precise amount of hot and cold water in order to achieve the desired output temperature water +/- 4°F.
  5. The heated water exits the unit at the base of the blending valve.

Note:
Domestic water heating applications with steam supply pressure greater than 15 psi require a steam pressure reducing valve as well as a separate steam pressure relief valve to be installed in the incoming steam supply line prior to the heat exchanger shell.
Hubbell can supply the pressure reducing valve as an option. Steam pressure relief valve supplied by others.


General Configuration
  • The factory-supplied, all welded, heavy duty steel stand is high enough to accomodate the condensate piping and traps, therefore no special field-erected stand is required.
  • Hubbell is committed to increasing operating efficiencies and improving safety features. Therefore, each water heater is supplied with a factory jacket and insulated heat exchanger. Without this feature, the heat exchanger (with a surface temperature in excess of 200°F) acts as a radiator and adds to heat loss inefficiencies and is a severe safety hazard for personnel who may inadvertently come in contact wit the surface of the exchanger.
  • The Hubbell water heater will fit through most doorways, for simple and time saving installation.
  • With only 7 square feet of floor space required for installation, compared to conventional storage water heaters the Hubbell water heater will require significantly less mechanical room space.
  • Traps and strainers are factory piped, assembled and tested to save time and money during installation and start-up.
  • Built-in relief valve (water side) set at 165 psi to signal over-pressure condition.

F Model Optional Equipment
Heating Coil
  • Double wall tubing with leak detection port (F30 and F60 sizes only)
  • Tubing materials available: Standard is copper, Optional materials are Admiralty, 90/10 Copper-Nickel, Stainless Steel (Type 304 or 316)
    Note:Tubing materials other than copper will exhibit lower maximum capacities
Steam Shell
  • Shell Construction: Standard is Cast Iron, Optional materials are Cast Steel, Cast Bronze, 90/10 Copper-Nickel, Stainless Steel (Type 304 or 316)
    Note:Cast steel shell ratings: F30: 225 psi @ 350°F F60 & F90: 225 psi @ 350°F F120: 225 psi @ 350°F
Operating Controls
  • In order to limit the steam pressure in the heat exchanger shell a steam pressure reducing valve is factory supplied and shipped loose for in-the-field installlation
  • Single solenoid safety system opens the sensing line to the blending valve in order to limit the hot water output in the event of an over temperature condition. Requires 5 Amp, 120 Volt service.
  • Double solenoid safety system opens the sensing line to the blending valve as well as closing the steam supply to heat exchanger in the event of an over temperature condition. Requires 5 Amp, 120 Volt service.
  • All steam components (traps, strainers) shall be Cast Steel construction
  • If water hardness exceeds 120 ppm, scale build-up can reduce efficiency. A factory packaged Klean-Koil Kit™ with built-in connections will allow for quick and easy in-place cleaning of the coil to remove these deposits thereby avoiding long periods of down time and expensive maintenance costs.
  • Optional temperature control to +/- 3°F of set temperature.
  • All 316 Stainless Steel blending valve and 316SS water piping
Recirculation Packages
  • Fixed temperature 3 way diverting valve, one (1) 1" globe valve, and two (2) 1" check valves are shipped loose for in-the-field installation.
  • Same as previous option except with 3-way diverting valve that has an adjustable range.
  • 3 way diverting valve is factory fitted and piped to the water heater.

Please note: optional equipment may impact overall dimensions and weight. Please request submittal drawing from factory.


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Specifications

Model F Water Heater Specifications
Orientation: Vertical
Installation: Floor Mounted
Space Requirement: 7 Sq.Ft.
Certification: ASME Section VIII
Waterside WP: 160 psi (max)
Shell Material: Ductile Iron
Shell Rating:
F30 & F60: 75 psi @ 350°F
F90 & F120: 50 psi @ 350°F
Coil Rating:
F30 & F60: 200 psi @ 400°F
F90 & F120: 200 psi @ 400°F
Coil Material: Copper Tubing SB75
Coil Size:
F30/F60/F90: 0.5" O.D. 18 BWG
F120: 0.625" O.D. 18 BWG
Ideal Water Temperature
Operating Range:
105-185°F
Main Condensate Trap: F&T Type
Drip Trap: Thermostatic Type
Steam Pressure Gauge: 30" Hg - 30 psig
Water Gauge:
70-270°F, 0-200 psi
20-120°C, 0-1400 kPa
Frame: Steel Angle Iron
Protective Shroud: 20 GA Galvanized Steel
Insulation: 2 Lb. Density Fiberglass
Strainers: Y Cast Iron 20 MESH Screen
Warranty (Standard):
Shell: 5 year
Coil: 5 year
Shipping Weight (Lbs.):
F30: 320
F60: 405
F90: 450
F120: 615
Piping:
Water: Brass
Steam: Black Iron
Outline Dimensions
Model F Dimensional Data
F15 F30 F45 F60 F75 F90 F105 F120
Height "A" 49" 49" 52" 52" 67" 67" 68" 68"
Width "B" 26" 26" 26" 26" 26" 26" 26" 26"
Length "C" 39" 39" 39" 39" 39" 39" 39" 39"
Cold Water Inlet (Male NPT) 1 1/2" 1 1/2" 1 1/2" 1 1/2" 2 1/2" 2 1/2" 2 1/2" 2 1/2"
Hot Water Outlet (Female NPT) 2" 2" 2" 2" 2 1/2" 2 1/2" 2 1/2" 2 1/2"
Steam Inlet (Female NPT) 3" 3" 4" 4" 4" FLG 4" FLG 4" FLG 4" FLG
Main Condensate (Trap Size) 1 1/4" 1 1/4" 2" 2" 1 1/2" 1 1/2" 1 1/2" 1 1/2"
Drip Trap Size 1/2" 1/2" 1/2" 1/2" 1/2" 1/2" 1/2" 1/2"
Steam
Consumption
Formula
Steam Pressure (psi) 0 2 5 10 15 20 25 30 40 50
Latent Heat 970 966 960 953 946 939 933 929 920 912
Recovery Rate Chart

Recovery Rate Chart
Recovery Rates in GPM

Recovery Rate Chart
Recovery Rates in GPM
For domestic water heating applications optimum performance (+/- 4°F) is achieved when the steam pressure in the heat exchanger shell is 15 psi or less. Therefore, if the steam supply pressure is greater than 15 psi a pressure reducing valve is used to reduce the steam pressure in the heat exchanger shell to a maximum of 15 psi. For domestic water heating applications optimum performance (+/- 4°F) is achieved when the steam pressure in the heat exchanger shell is 15 psi or less. Therefore, if the steam supply pressure is greater than 15 psi a pressure reducing valve is used to reduce the steam pressure in the heat exchanger shell to a maximum of 15 psi. For domestic water heating applications optimum performance (+/- 4°F) is achieved when the steam pressure in the heat exchanger shell is 15 psi or less. Therefore, if the steam supply pressure is greater than 15 psi a pressure reducing valve is used to reduce the steam pressure in the heat exchanger shell to a maximum of 15 psi. For domestic water heating applications optimum performance (+/- 4°F) is achieved when the steam pressure in the heat exchanger shell is 15 psi or less. Therefore, if the steam supply pressure is greater than 15 psi a pressure reducing valve is used to reduce the steam pressure in the heat exchanger shell to a maximum of 15 psi. For typical process or general applications with less stringent temperature control requirements (+/- 8°F) up to 35 psi steam pressure in the heat exchanger shell may be utilized. If incoming steam supply pressure is greater than 35 psi a pressure reducing valve is used to reduce the steam pressure in the heat exchanger shell to a maximum of 35 psi. For typical process or general applications with less stringent temperature control requirements (+/- 8°F) up to 35 psi steam pressure in the heat exchanger shell may be utilized. If incoming steam supply pressure is greater than 35 psi a pressure reducing valve is used to reduce the steam pressure in the heat exchanger shell to a maximum of 35 psi. For typical process or general applications with less stringent temperature control requirements (+/- 8°F) up to 35 psi steam pressure in the heat exchanger shell may be utilized. If incoming steam supply pressure is greater than 35 psi a pressure reducing valve is used to reduce the steam pressure in the heat exchanger shell to a maximum of 35 psi. For typical process or general applications with less stringent temperature control requirements (+/- 8°F) up to 35 psi steam pressure in the heat exchanger shell may be utilized. If incoming steam supply pressure is greater than 35 psi a pressure reducing valve is used to reduce the steam pressure in the heat exchanger shell to a maximum of 35 psi.

Recovery Rate Chart
Recovery Rates in GPM

Recovery Rate Chart
Recovery Rates in GPM
Supplied domestic water pressure needs to exceed steam pressure Supplied domestic water pressure needs to exceed steam pressure Supplied domestic water pressure needs to exceed steam pressure Supplied domestic water pressure needs to exceed steam pressure Supplied domestic water pressure needs to exceed steam pressure Supplied domestic water pressure needs to exceed steam pressure Supplied domestic water pressure needs to exceed steam pressure Supplied domestic water pressure needs to exceed steam pressure
Base Model °F Temp. In/Out Steam Supply Pressure (psi) Steam Supply Pressure (psi) Steam Supply Pressure (psi) Steam Supply Pressure (psi) Steam Supply Pressure (psi) Steam Supply Pressure (psi) Steam Supply Pressure (psi) Steam Supply Pressure (psi)
Base Model °F Temp. In/Out 2 5 10 15 20 25 30 35
F15
F15 40-120 14 15 15 15 12 15 16 16
F15 40-140 10 11 12 14 11 14 15 15
F15 40-160 8 9 10 11 10 12 13 13
F15 40-180 7 8 9 10 9 11 12 12
F15 60-120 15 15 15 15 14 18 19 19
F15 60-140 12 13 14 15 13 16 17 17
F15 60-180 8 9 10 11 10 12 13 13
F30
F30 2 5 10 15 20 25 30 35
F30 40-120 27 30 30 30 24 30 33 33
F30 40-140 20 22 24 27 22 28 30 30
F30 40-160 16 18 20 22 19 24 26 26
F30 40-180 15 17 19 21 17 22 23 23
F30 60-120 30 30 30 30 28 35 38 38
F30 60-140 23 25 27 30 25 31 34 34
F30 60-180 21 22 23 24 19 24 26 26
F45
F45 2 5 10 15 20 25 30 35
F45 40-120 41 45 45 45 36 45 50 50
F45 40-140 33 38 41 44 33 42 45 45
F45 40-160 26 31 33 35 29 36 39 39
F45 40-180 16 17 19 21 26 32 35 35
F45 60-120 45 45 45 45 43 54 58 58
F45 60-140 40 42 44 45 38 47 51 51
F45 60-180 22 25 29 33 29 36 39 39
F60
F60 2 5 10 15 20 25 30 35
F60 40-120 54 60 60 60 48 60 66 66
F60 40-140 46 54 58 60 44 56 60 60
F60 40-160 34 41 44 46 38 48 52 52
F60 40-180 21 23 25 28 34 43 46 46
F60 60-120 60 60 60 60 57 73 78 78
F60 60-140 57 59 60 60 50 62 68 68
F60 60-180 29 33 39 44 38 48 52 52
F75
F75 2 5 10 15 20 25 30 35
F75 40-120 68 75 75 75 60 75 84 84
F75 40-140 58 68 73 75 55 70 75 75
F75 40-160 43 51 55 58 48 60 65 65
F75 40-180 26 29 31 35 43 53 58 58
F75 60-120 75 75 75 75 72 90 97 97
F75 60-140 71 74 75 75 63 78 85 85
F75 60-180 36 41 49 55 48 60 65 65
F90
F90 2 5 10 15 20 25 30 35
F90 40-120 81 90 90 90 72 90 99 99
F90 40-140 69 81 87 90 66 84 90 90
F90 40-160 51 61 66 69 57 72 78 78
F90 40-180 31 34 37 42 51 64 69 69
F90 60-120 90 90 90 90 86 111 118 118
F90 60-140 85 88 90 90 75 93 102 102
F90 60-180 43 49 58 66 57 72 78 78
F105
F105 2 5 10 15 20 25 30 35
F105 40-120 95 105 105 105 84 105 118 118
F105 40-140 81 95 102 105 77 98 105 105
F105 40-160 60 72 77 81 67 84 91 91
F105 40-180 37 40 44 49 60 74 81 81
F105 60-120 105 105 105 105 101 126 136 136
F105 60-140 100 103 105 105 88 109 119 119
F105 60-180 51 58 68 77 67 84 91 91
F120
F120 2 5 10 15 20 25 30 35
F120 40-120 108 120 120 120 96 120 132 132
F120 40-140 92 108 116 120 88 112 120 120
F120 40-160 68 82 88 92 76 96 104 104
F120 40-180 42 46 50 56 68 85 92 92
F120 60-120 120 120 120 120 115 149 158 158
F120 60-140 114 118 120 120 100 124 136 136
F120 60-180 58 66 78 88 76 96 104 104
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