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Load Side Pump

Buffer Tank

Aqua-stat

W2W Unit

Flow Center

Zone Pumps

Manifolds

Tubing

115F

T1 T2

24V AQUASTAT WITH N/O DRY CONTACTS

THAT WILL CLOSE ON FALL IN TEMP!

HEATING ONLY CONTROLS!

Sensor in tank

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Load Side Pump

Buffer Tank

Aqua-stat

W2W Unit

Flow Center

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� Combo Heat Pump◦ Thermostat (Forced Air)◦ Electric auxiliary heater (Optional)◦ Air Pad◦ Buffer Tank (Pressurized or HSS)◦ Load Side Pump◦ Aquastat (hydronic control)◦ Flow Center� Pressurized

� Non-Pressurized

� Hose kit

� Tubing◦ Fasteners

◦ Manifolds

◦ Fittings

� Zone pumps/Zone Valves◦ Flanges (w/ pumps)

� Hydronic Accessories◦ Air Eliminator

◦ Expansion Tank

� Controls◦ Zone Control

◦ Pump Relay

◦ Thermostats

Load Side Pump

Buffer Tank

Aqua-stat

GT Unit

PT Ports

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On Demand Control Strategy!

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• Water-Water Unit Applications• Pressurized piping systems• HSS non-pressurized piping systems• Controls (heating & cooling)

• HSS System (on demand)• HBX Controls (either or, plus Outdoor Reset)• Geo-Tech (Don Schuster) (Set point)• Terra-Therm Hydronic Controller (Set point)• Do it yourself (who knows)

• Controls (Heating only)• HSS• HBX• Tekmar• Johnson Controls• Honeywell• Ranco

� W2W units have lower EER’s than Water-Air heat pumps

� Be careful of sensible cooling capacities of the air handler or water coils – do not size strictly based on tonnage

� All piping with chilled water needs to be insulated including pumps

� Buffer tank must be insulated and have an air seal to prevent condensation

� Advantage – one unit vs. two units

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HBX ECOHBX ECO--1000 Wiring Diagram (2stg)1000 Wiring Diagram (2stg)

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� What is the boiler’s primary function:◦ Back up source only

◦ Supplemental heat – same output temp

◦ Increase supply temp to provide additional btu’s to high load areas

◦ What source of energy is the backup boiler

� Gas

� Electric

� Wood

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� Pool & spa heating

� Domestic water heating

� Snow melt

� Process water chilling

� Ice storage or Ice arena’s

� Waste heat recovery

� Simultaneously heating & cooling

� Design the system properly, not using Btu’s per sqft, but rather good design practices.

� Insulation is a huge factor along with thermal breaks, if you aren’t doing it, verify it is done right!

� Select the proper control strategy for the application, buy off the shelf vs. build your own so anyone can service and troubleshoot!

� Size your piping and pumps for proper flow.

� Select your piping strategy for the application as well as the supplemental heat source.

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Thank You!!!Thank You!!!Thank You!!!Thank You!!!Thank You!!!Thank You!!!Thank You!!!Thank You!!!