load match next generation
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The Solutions Company
Heating, Ventilating and Air Conditioning
Systems
Next Generation LoadMatch® Systems
Family owned business since starting as the Thermal Appliance Company in 1920
An innovator in the HVAC industry for over 80 years
Tankless water heater Water tempering valve Wet rotor circulator LoadMatchTM System
Full range of quality products and systemsPeople oriented organization
Taco personnel and representatives are highly motivated and responsive. Company “culture “ is a personal one, with a shared sense of commitment and dedication.
Full Range of Pump Products
Wet Rotor Water Lubricated Circulator 00 and LoadMatchTM Series
Dry Rotor Oil Lubricated Circulator 110 and 120 Series
Horizontal In-Line Pump 1600 Series
Close Coupled In-Line Pump 1900 Series
Full Range of Pump Products
Vertical In-Line Pump KS and KV Series
End Suction Base Mounted Pump FI Series
End Suction Close Coupled Pump CI Series
Base Mounted Split Case Pump TA Series
Full Range of Pump Products
Wet Rotor Circulator00 Series
Features Water lubricated wet rotor cartridge. Maintenance Free.
• No seals, water lubricated.
• No coupler, direct drive.
• No bearing assembly. Highly reliable, 3 year warranty on cartridge. Repairable in-line without removing piping
connections. 10’s of millions sold and installed.
• Taco is the leading manufacturer of circulators in the U.S.
Wet Rotor CirculatorLoadMatchTM Series
Features Based on “00” water lubricated wet rotor circulator w/
3 year cartridge warranty. Integral flow check.
• Eliminates gravity and circulator off cycle circulation. Integral condensate baffle.
• Eliminates condensation on motor housing down to 38F chilled water
200 psi standard pressure rating. UL label.
Wet Rotor CirculatorLoadMatchTM Series
Wet Rotor CirculatorLoadMatchTM Series
Applications Residential heating and cooling systems. Commercial heating and cooling systems.
• LoadMatchTM. terminal unit secondary pump.
• Zone secondary pump.
• Air handling unit tertiary freeze protection pump. Domestic water systems.
• D’MAND System
Save Energy Hydronic systems use less energy than
air systems to move the same BTU’s. Reduce head loss by eliminating
control valves and most balance valves.
Operate system variable flow by matching system capacity to loads.
Save Money Reduce first costs with less pipe, fewer
fittings, and valves. Reduce energy and maintenance costs.
Save Time Reduce design effort.
Improve Occupant Comfort and System Performance Self Balancing (Balance by Design)
Insure required flow to all terminal units at all times. Eliminate “tweaking” of water balance and “call backs”.
System is Forgiving Diversity available to all terminal units. Secondary circulator always delivers the required or greater flow.
Primary Loop Piping
Single Pipe Primary Loop Simplified layout and design.
Self Balancing System Eliminate almost all balancing. Control BTU’s, not flow.
Utilize System Diversity Diversity available to all units without variable speed drives. Design for operating temperature differences with diversity. Large safety factors not required.
Heat Transfer in Heat Exchanger
Heat Transfer in a Coil or Heat Exchanger Q = U x A x T
• U = Heat transfer coefficient (btu/hr-ft2-oF)– Function of velocity (flow) – Higher velocity (flow) Higher U value More Heat Transfer
• A = Heat transfer surface area (ft2)– Function of rows of coil or HX area– More rows Larger Area More Heat Transfer
• T = Temperature difference (oF)– Function of entering water temperature– Lower entering chilled water temperature Larger T More Heat
Transfer– Higher entering heating water temperature Larger T More Heat
Transfer
Methods to Achieve Terminal Unit Capacity Size terminal unit coil for cascaded entering water
temperature.Vary flow or coil surface area to achieve desired capacity
of terminal unit at cascaded entering water temperature.
Heating Fan Coil Capacity
0.00
4.00
8.00
12.00
16.00
180 / 1 / .6 180 / 1 / 1.6 160 / 2 / .5
EWT (Deg.F ) / Rows (#) / Flow (GPM)
Cap
acity (M
BH
)
Heating Capacity
180 / 1 / .6 160 / 1 / 1.6
160 / 2 / .5
Methods to Achieve Terminal Unit Capacity Size terminal unit coil for cascaded entering water
temperature. Vary flow or coil surface area to achieve desired capacity of
terminal unit at cascaded entering water temperature.
Cooling Fan Coil Capacity
0.00
2.00
4.00
6.00
8.00
40 / 2 / 1 50 / 2 / 2.2 50 / 3 / 1.5
EWT (Deg.F ) / Rows (#) / Flow (GPM)
Cap
acit
y (M
BH
)
Sensible Capacity
Latent Capacity
40 / 2 / 1 50 / 2 / 2.2 50 / 3 / 1.5
Methods to AchieveDehumidification Can dehumidify with 50F entering water temperature. Dew point at ASHRAE maximum indoor design
conditions of 75F and 60% RH is 60F.
Methods to Achieve DehumidificationSensible heat ratios of typical cooling load City Sensible Latent Sensible (Typical Office Heat Heat Heat Heat Gain) (MBH) (MBH) Ratio Boston 3.6 1.1 0.77 Jacksonville 3.7 1.6 0.70 St. Louis 4.0 1.2 0.77 New Orleans 3.8 1.6 0.70 Denver 3.6 0.0 1.00 Phoenix 4.3 0.7 0.86 Seattle 3.5 0.8 0.81 San Diego 3.7 0.8 0.82
Methods to Achieve Dehumidification
Sensible Heat Ratio of Typical Cooling Coil
0.50
0.60
0.70
0.80
0.90
1.00
40 42 44 46 48 50
Entering Chilled Water Temperature(Deg. F)
Sen
sib
le H
eat
Rat
io
Sensible Heat Ratio
Methods to Achieve Dehumidification Utilize 100% dedicated outside air unit.
Controls humidity directly. Separates sensible and latent cooling loads on
terminal units. No mismatch of sensible heat ratios of load and coil.
100% Dedicated Outside Air Unit
Methods to Achieve Dehumidification
Utilize 100% dedicated outside air unit. Size airflow for 1 to 2 air changes per hour
for sum of infiltration + exhaust airflow, instead of 8 to 10 air changes per hour for cooling airflow.
Fresh Air Plenum
Cooling Coil
Filter
Air Handling Unit
Fan
Untreated Fresh Air Treated
(Dehumidified) Supply Air
Reheat Coil
Preheat Coil
Methods to Achieve Dehumidification
Size terminal unit coil for cascaded entering water temperature.
Controls humidity indirectly. Vary flow or coil surface area to achieve desired
capacity of terminal unit at cascaded entering water temperature.
Does not always solve humidity control problems in humid climates.• Mismatch of sensible heat ratios of load and coil.
• Operation of HVAC equipment on/off.
Methods to Achieve Dehumidification Size terminal unit coil for cascaded entering water
temperature. Vary flow or coil surface area to achieve desired capacity of
terminal unit at cascaded entering water temperature.
Cooling Fan Coil Capacity
0.00
2.00
4.00
6.00
8.00
40 / 2 / 1 50 / 2 / 2.2 50 / 3 / 1.5
EWT (Deg.F ) / Rows (#) / Flow (GPM)
Cap
acity
(MB
H)
Sensible Capacity
Latent Capacity
40 / 2 / 1 50 / 2 / 2.2 50 / 3 / 1.5
There is no limit to the number of terminal units that can be installed on one circuit.
There is no limit to the number of terminal units that can be installed on one circuit.
Entering temperature at last terminal unit on primary circuit is a function of design temperature difference not the number of units installed on the circuit.
Q = Load (btu/hr)
= M x Cp x T= GPM x 500 x T (btu/hr)
Entering temperature at last terminal unit (worst case). = Design supply water temperature ± design T
Design for operating temperature differences with diversity. Entering temperature at last terminal unit (worst case). = Design supply water temperature ± operating T
Secondary Loop Piping Decoupled Two Pipe
Secondary Loop Individual zone control for all
terminal units. Replace Control Valves and
Balance Valves with Highly Reliable Water Lubricated Circulator
Provide required flow to all units at all times and improve comfort.
Operate Circulators Based on Load Match capacity of system to load and reduce energy consumption.
Design Flexibility Utilize Two Pipe and
Single Pipe Configurations Where Best Suited
Superior Comfort Self Balancing Total Control – Each Terminal Unit Operates
Independently with own CirculatorSave Energy
Eliminate Control and Balance Valves and Some PipeSave Money
Lower First Costs Reduce Maintenance Costs
Save Design Time
The Solutions Company
Heating, Ventilating and Air Conditioning
Systems
Next Generation LoadMatch® Systems