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© 2013 Taco Electronic Solutions, Inc.
1
Installation Guide
502-025
HPU2 & HPU3 Water Source Heat Pump Controller
Self-Contained Interoperable Controller Model UCP-1
SUPERSEDES: February 28, 2012
EFFECTIVE: April 17, 2013
Plant ID: 001-3982
SPECIFICATIONS
Electrical Inputs
Cabling:
twisted shielded pair, 18
AWG
recommended—500
feet max. (152
meters), 10 bit resolution
Space Temp (optional):
Precon Type II or Type III 10k thermistor
Supply Air Temp (HPU3 only):
Precon Type III 10K thermistor
Heat Pump Power Transducer (HPU3 only):
0 to 10 Volts DC
Equipment Status, High Pressure Alarm (HPU3 only), Low Pressure Alarm (HPU3 only):
Dry Contact, Normally Open,
5 Volts DC Max
Thermostat Network:
12 Volt nominal, internally limited to 0.04 A (TS300 Series)
Electrical Outputs
Modulated Fan (HPU3 only):
Analog 0-10 Vdc, 2K Ohm minimum load, 8 bit resolution
Stage 1, Stage 2, Reversing Valve, Fan, Dehumidification (HPU3 only):
Triac 24 VAC, 1A @ 50C, 0.5A @ 60C, limited
by the Class 2 supply rating
Recommended Sensor Wire
Recommended LON Bus FTT-10A Network Wire
Speed:
78KBPS
Max Volts:
42.4 Volts DC
Cabling:
Maximum node-to-node distance: 1312 feet (400 meters); Maximum total distance: 1640 feet (500 meters)
Mechanical
Dimensions:
5.55” (141mm) high, 6.54” (166 mm) wide, 1.75” deep (44
mm),
ABS
Controller Weight:
0.70
pounds
(0.32
kilograms)
Shipping Weight:
1.0
pounds
(0.46
kilograms)
Processor:
3150 Neuron 10 MHz
Flash:
48
Kilobytes
Cable Type
Pairs
Details
Taco Catalog No.
18AWG
1
Stranded Twisted Shielded Pair, Plenum
WIR-018
Cable Type
Pairs
Details
Taco Catalog No.
Level 4 22AWG (0.65mm)
1
Unshielded, Plenum, U.L. Type CMP
WIR-022
Summary of Contents for iWorx HPU2
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