PC700 Boiler Reset Control
Improves Performance in Hot Water Heating Systems
The PC700 Boiler Rest Control is designed to improve performance in your hot water heating systems by regulating the supply water temperature of a single boiler based on the outdoor temperature. The PC700 Boiler Reset Control utilizes a heating curve to set the relationship between outdoor temperature and supply water temperature to provide optimum control and comfort. Thanks to its integral microprocessor, the PC700 Boiler Reset Control is able to continuously adjust the boiler differential to avoid boiler short-cycling and large temperature swings, Standard functions include warm weather shut down, minimum boiler supply temperature setting, and a starting water temperature setting. A liquid crystal display clearly shows the boiler supply temperature and other monitored temperatures and settings for simple and effective control.
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| Zone Control Wiring Guide |
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Performance Data
Boiler Start — 35 to 150°F (2 to 66°C) Factory: 70°F (21°C)
Outdoor Start — 35 to 85°F (2 to 29°C) Factory: 70°F (21°C)
Boiler Design — 70 to 220°F (21 to 104°C) Factory: 190°F (88°C)
Outdoor Design — -60 to 32°F (-51 to 0°C) Factory: 10°F (-12°C)
Boiler Minimum — Off, 80 to 180°F (Off, 27 to 82°C) Factory: 140 °F (60°C)
Differential — Auto, 2 to 42°F (Auto, 1 to 24°C) Factory: Auto
WWSD — 35 to 100°F, Off (2 to 38°C, Off) Factory: 70°F (21°C)
Units — °F, °C Factory: °F
Features
- Control — Microprocessor PI control; This is not a safety (limit) control.
- Packaged weight — 1.3 lb. (580 g)
- Dimensions — 4-3/4” H x 2-7/8” W x 7/8” D (120 x 74 x 22 mm)
- Approvals — CSA NRTL /C; Meets ICES & FCC regulations for EMI/RFI
- Ambient conditions — Indoor use only, 32 to 105°F (0 to 40°C), < 90% RH noncondensing.
- Power supply — Class 2, 24 V ±10% 50/60 Hz 3 VA (Powered by Taco -Exp Control) Relays — 24 V (ac) 5 A 1/6 hp, pilot duty 240 VA
Sensors Included:
- NTC thermistor, 10 kΩ @ 77°F (25°C ±0.2°C) ß=3892
- Outdoor Sensor M 2036 and Universal Sensor 071.
Applications
- Hot Water Heating Systems
- Closed Cooling Circuits
- Air Conditioning Systems
- Hydronic Heating & Cooling
- Water/Glycol concentrations up to 50%
- Solar / Geothermal
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