1. Conventional HP Schematic
Conventional Heat Pump System

2. Acadia Refrigeration Schematics
Boosted Compression furthers the absorption of heat into the outdoor coil
Normal Operation
Boosted Compression

3. Hallowell International’s ACADIA Series5 6 3 1 4 7 2 8
High Performance Coil – Designed for Maximum Heat Absorption, Efficiency and Reduced Defrost Cycles. 1
Thermally Protected Reversing Valve – Reversing Valve is Protected from elements, enhancing system performance. 2
Liquid Economizer – Supplements BTUs and increases efficiency by minimizing system losses using patented technology. 3
Suction Accumulator – Provides system compressor protection year round. 4
2 Stage, Bristol Benchmark TS Series Compressor – Offers superior efficiency, reliability and reduced temperature swings. 5
Bristol Benchmark Series Booster Compressor – Allows further heat absorption at mild conditions, Increasing BTUs and Delivery Air Temperatures. 6
Charge Compensator – Allows system to operate at Maximum efficiency during both Heating and Cooling. 7
Thermostatic Expansion Valve – Maintains system high efficiency by Maximizing Coil Performance. 8

4. Hallowell International’s ACADIA Series
Weather Tough Fan Guard –
PVC dipped heavy gauge steel fan guard. 1 1 3 2 4 5
Swept Wing Fan - Designed for optimum efficiency and quiet operation. 2
High Performance Coil – Designed for Maximum Heat Absorption, Efficiency and Reduced Defrost Cycles. 3
Durable Cabinet Construction The Acadia is constructed of heavy gauge galvanized steal using polyester powder finish for increased weather protection 4
Double Isolated Compressor Mounting - Engineered to significantly reduce torsional vibration associated with compressor operation. 5

5. Bristol Benchmark Series – Twin Single
1 Cylinder Mode
2 Cylinder Mode

6. Bristol Benchmark Series – Operational Temperature Bin

7. Standard Heat Pump at 45º F outdoor temperature
120°F DISCHARGE
110°F Saturation
TXV
40°F Saturation
95°F
70°F
360psi
Indoor Unit
Outdoor Unit
45°F
Outdoor air
180°F
50°F
360psi
120psi
3:1
3500RPM Fixed Displacement

8. Standard Heat Pump at 25º F outdoor temperature
81°F sat
21°F Sat
75°F
70°F
240psi
Indoor Unit
Outdoor Unit
25° F
140°F
35°F
240 psi
80 psi
3:1

9. Turbo Concept System 25deg outdoor
110°F sat
130°F
21°F sat
Outdoor Unit
70°F
Indoor Unit
25˚F
220°F
80°F
35°F
120psi
80psi
360psi
As outdoor air temperature drops the turbo would ramp up to maintain input to the primary compressor

10. Booster at 25deg outdoor air
130°F Discharge
110°F sat
21°F sat
95˚F LL Temp
70°F Return
Indoor Unit
Outdoor Unit
80°F
220°F
35°F
365psi
120psi
80psi

11. Economizer
The Economizer only operates when the Booster Compressor is running.
110°F sat
130°F
95°F
50°F
21°F sat
70°F
41˚F Sat
Indoor Unit
Outdoor Unit
35°F
220°F
360psi
120psi
60°F
80psi