NOTE: For information or questions outside the scope of this manual contact a qualified heating professional for assistance.
TABLE OF CONTENTS CHAPTERS • GENERAL DATA page 3 • SIZING THE RADIATOR page 6 • TEMPERATURE CORRECTION page 7 • FLOW RATE page 8 • PRESSURE DROP page 9 • ROUGH-IN page 12 • BRACKET & RADIATOR INSTALLATION page 13 • SYSTEM CONNECTION page 14 • THERMOSTATIC VALVE & OPTIONAL OPERATOR page 16 • PIPING SCHEMATICS page 17 • PIPING OPTIONS page 22 2
GENERAL DATA MODEL HEIGHT (in.) LENGTH (in.) BASEBOARD EQUIVALENT* (ft.) HD12-16D HD12-24D HD12-32D HD12-40D HD12-48D HD16-16D HD16-24D HD16-32D HD16-36D HD16-40D HD16-48D HD20-16D HD20-24D HD20-32D HD20-36D HD20-40D HD20-48D HD24-16D HD24-24D HD24-32D HD24-36D HD24-40D HD24-48D HD36-16D HD36-20D HD36-24D HD36-32D 12 12 12 12 12 16 16 16 16 16 16 20 20 20 20 20 20 24 24 24 24 24 24 36 36 36 36 16 24 32 40 48 16 24 32 36 40 48 16 24 32 36 40 48 16 24 32 36 40 48 16 20 24 32 3.33 5.00 6.67 8.33 10.
GENERAL DATA Item # Description EVK Plus/12" EVK Plus/16” 12" Wall Bracket Set (supplied with radiator) 16” Wall Bracket Set (supplied with radiator) EVK Plus/20" 20" Wall Bracket Set (supplied with radiator) EVK Plus/24" 24" Wall Bracket Set (supplied with radiator) EVK Plus/36” 36” Wall Bracket Set (supplied with radiator) A394-1/2"PEX 1/2" Pex Tubing Adapter (2 pcs supplied with radiator) A431-1/2"COPPER 1/2" Copper Pipe Adapter (2 pcs supplied with radiator) A55400T 3/4"EK x 1/2" Reducer
GENERAL DATA As indicated in the specification chart on page 3, Pensotti steel panel radiators are double panel and available in five different heights; 12”, 16”, 20”, 24” and 36”, each includes multiple lengths and heat outputs.
SIZING THE RADIATOR 1. An accurate heat loss should be performed to determine the load of the space(s) to be heated. 2. Choose a radiator from the specification chart that most closely matches the heat loss of the space in which it is to be installed. If a single radiator does not have enough capacity, divide the load evenly into two or three radiators. (Radiator specifications on the chart are based on 180 degree F average water temperature and 68 degree F room temperature). 3.
CORRECTION FACTOR CHART Delta T Correction Average Water Temperature – Factor Room Temperature 37 41 46 50 55 59 63 68 73 77 82 86 91 95 100 104 108 113 117 121 125 130 135 140 0.24 0.28 0.32 0.36 0.41 0.45 0.50 0.54 0.59 0.64 0.69 0.74 0.79 0.84 0.89 0.95 1.00 1.06 1.11 1.17 1.22 1.27 1.32 1.38 Standard Btu Output x Correction Factor = Corrected Btu Output 6,469 Btu x .
FLOW RATE Flow rates for a Pensotti steel panel radiator system are based on the calculated heat loss of each heating zone. Using the calculated heat loss, determine the Btu load of each individual zone. The following formula will be used to calculate the flow rate from the Btu load of the individual zones. Flow Rate (GPM) = Heat Loss (Btu/h) / 499.8 x Delta T (F)* Delta T is the temperature difference between the supply and return of the radiators in each zone.
PRESSURE DROP Radiator Pressure Drop The following chart will be used to determine the pressure drop for each Pensotti Double Panel Radiator. PENSOTTI DOUBLE PANEL RADIATOR PRESSURE DROP 1.4 FEET OF HEAD 1.2 1 0.8 0.6 0.4 0.2 0 GPM FLOW To determine the pressure drop for a radiator, first determine the gpm flow through that radiator using the flow rate formula on the previous page.
H VALVE PRESSURE DROP The following chart will be used to determine the pressure drop through both styles of Pensotti radiator valves. 4 3.75 3.5 3.25 3 2.75 2.5 2.25 2 1.9 1.8 1.7 1.6 1.5 1.4 1.3 1.2 1.1 1 0.9 0.8 0.7 0.6 0.5 0.4 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 0.3 FEET OF HEAD PENSOTTI RADIATOR VALVE PRESSURE DROP GPM FLOW Determining the pressure drop for the radiator valve is the same procedure used for the radiators on the previous page.
TOTAL PRESSURE DROP Total Piping Circuit Pressure Drop The total circuit pressure drop is calculated by adding together the total radiator pressure drop, total Hvalve pressure drop, boiler pressure drop, and the supply and return piping pressure drop (including all devices installed within the piping. (Flowcheck, airscoop, valves etc.). Circulator Sizing Circulator size is determined by two criteria; flow rate in gpm and total pressure drop in foot of head.
RADIATOR ROUGH-IN Dimensions 5 1/4" 4 1/8" 12" 20" 24" S MIN. 4" 3 1/4" R 2" O C 1 3/8" MIN. 4" Radiators should be placed on an outside wall, below a window if possible. Check the installation location and determine if adequate space is available to accommodate the panel size chosen. Pensotti recommends the use of the bottom supply and return connections. These connections are located near the end of the radiator.
BRACKET AND RADIATOR MOUNTING Pensotti Snap-Grip mounting brackets must be securely fastened to the wall. Frame type construction requires the brackets to be fastened to the wall studs, preferably towards the ends of the radiator. If each bracket cannot be secured to a wall stud, use 3/8” (minimum) hollow wall toggle bolt fasteners. It is imperative that only one bracket, on any radiator, be secured with toggle bolts.
SYSTEM CONNECTION Pensotti panel radiators may be connected directly to the system piping using the available pex tubing and copper pipe adapters (Figure 1). Isolation By-pass valves are also available and are installed between the radiator and aforementioned tubing or pipe adapters (Figure 2).
Figure 1 Pex: Insert the A55400T reducers into the supply and return connections of the radiator and tighten with a 12mm allen wrench. Choose the proper size pex tubing adapter assembly, slide the nut onto the tubing followed by the compression ring, then firmly press the insert into the tubing until it bottoms out. Slide the nut and compression ring onto the A55400T reducer and tighten.
THERMOSTATIC VALVE ASSEMBLY & OPERATOR Integral Thermostatic Valve and Flow Setter Assembly Pensotti panel radiators have integral thermostatic and flow setter valves installed as standard equipment, thermostatic operators are optional. Flow Setter Adjustment (numbered) Integral Valve Assembly 30 MM Thread Accepts Optional Thermostatic Operator Flow Setter is adjusted by turning the inner gland (picture above) to the corresponding number.
PIPING SCHEMATICS Water Flow Piping schematics provided on the following pages are informational only and just a small sampling of possible piping arrangements. Sound engineering practices must be adhered to when designing any steel panel radiator heating system.
PIPING SCHEMATICS Monoflow (Diverter Tee) Monoflow w/Thermostatic Operators Downflow Monoflow w/ Thermostatic Operators* 1 Foot Minimum 1 Foot Minimum 1 Foot Minimum *Two monoflow tees required on each radiator 18
PIPING SCHEMATICS Direct Return (Flow Balancing Required) Direct Return w/Thermostatic Operators (Flow Balancing Required) Reverse Return With or Without Thermostatic Operators 19
PIPING SCHEMATICS Homerun Homerun with Thermostatic Operators and By-Pass Valve Homerun with Electric Zone Valve and By-Pass Valve 20
PIPING SCHEMATICS Homerun with Thermostatic Operators and Variable Speed Delta T Circulator 21
PIPING OPTIONS Pensotti recommends their panel radiators be connected to the piping system through the bottom supply and return connections. This guarantees complete water flow through the radiator and proper operation of the flow-setter and thermostatic valve. Should it be impossible or impractical to use bottom connections, other piping configurations are possible using the side connections. Extreme care must be used to assure proper water flow and flow-setter and thermostatic valve operation.
PIPING OPTIONS AIR VENT PLUG PLUGS (2) NO INTEGRAL THERMOSTATIC OR FLOW CONTROL RETURN SUPPLY PENSOTTI PANEL RADIATORS - ALTERNATE PIPING ARRANGEMENT 2 AIR VENT PLUG PLUGS (2) NO INTEGRAL THERMOSTATIC OR FLOW CONTROL SUPPLY RETURN PENSOTTI PANEL RADIATORS - ALTERNATE PIPING ARRANGEMENT 3 THERMOSTATIC VALVE AIR VENT NOT RECOMMENDED PLUGS (2) NO INTEGRAL THERMOSTATIC OR FLOW CONTROL SUPPLY RETURN PENSOTTI PANEL RADIATORS - ALTERNATE PIPING ARRANGEMENT 4 THERMOSTATIC VALVE AIR VENT PLUGS (
PIPING OPTIONS THERMOSTATIC VALVE AIR VENT PLUG PLUG FULL THERMOSTATIC AND FLOW CONTROL RETURN SUPPLY PENSOTTI PANEL RADIATORS - ALTERNATE PIPING ARRANGEMENT 5 AIR VENT PLUG PLUGS (2) NO INTEGRAL THERMOSTATIC OR FLOW CONTROL SUPPLY RETURN PENSOTTI PANEL RADIATORS - ALTERNATE PIPING ARRANGEMENT 6 AIR VENT PLUGS (3) NO INTEGRAL THERMOSTATIC OR FLOW CONTROL RETURN SUPPLY PENSOTTI PANEL RADIATORS - ALTERNATE PIPING ARRANGEMENT 7 NOT RECOMMENDED PLUGS (3) SUPPLY PLUG NO INTEGRAL THERMOSTATIC OR FL
PIPING OPTIONS AIR VENT NOT RECOMMENDED PLUGS (2) PLUG NO INTEGRAL THERMOSTATIC OR FLOW CONTROL SUPPLY RETURN PENSOTTI PANEL RADIATORS - ALTERNATE PIPING ARRANGEMENT 4 AIR VENT NOT RECOMMENDED PLUGS (2) SUPPLY PLUG NO INTEGRAL THERMOSTATIC OR FLOW CONTROL RETURN PENSOTTI PANEL RADIATORS - ALTERNATE PIPING ARRANGEMENT 4 AIR VENT NOT RECOMMENDED PLUGS (3) NO INTEGRAL THERMOSTATIC OR FLOW CONTROL SUPPLY RETURN PENSOTTI PANEL RADIATORS - ALTERNATE PIPING ARRANGEMENT 4 NOTE: For information o
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