DtiCorp.com Is Introducing 3 Honeywell P7810 Electronic Pressure Controls

Online, February 18, 2011 (Newswire.com) - Fort Lauderdale, FL - Popular Honeywell online retailer DtiCorp.com (http://www.DtiCorp.com) is introducing 3 Brand New Honeywell P7810 Electronic Pressure Controls. Honeywell line voltage pressure controller that provides automatic operating control, automatic limit protection, manual reset limit protection, and 4-20ma modulating firing rate control for pressure systems up to 300 psi. Install the P7810 PressureTrol Controller above the boiler water line when used with steam boilers. Connect the siphon loop (part number 209731A or equivalent) between the P7810 Controller and the boiler to prevent scale and corrosive vapors from attacking the controller sensor element. Mount the P7810 Controller next to the pressure gauge in the manufacturer-provided fitting on the boiler. Mount at a remote location to avoid excessive vibration, or mount in a special mounting on a low water cutoff.

The P7810 uses integral electronic pressure sensors to sense pressure at the inlet through an internal manifold. The control sensor connects to the internal manifold with 1/4 inch NPT threads and provides the pressure signal to control a relay for the on/off control function. The same sensor provides the information for the 4 to 20 mA firing rate modulation output.

A separate integral electronic pressure sensor is required to provide the high limit function. This sensor also connects to the internal manifold with 1/4 inch NPT threads P7810 devices contain two internal sensors and require a 1/2 inch NPT mounting to the steam pressure header. Devices with high limits lock out at setpoint and require manual reset when pressure returns below the setpoint. Devices will not reset with power interruption.

Features:

- May be used with steam, air, non-combustible gases or fluids that will not corrode the pressure sensing element.
- Models available in 15, 150, 300 psi maximum set points.
- LED indicators show limit function/lockout.
- Reset function easily accessible under cover.
- Light Emitting Diode (LED) indicators show power, call for heat function and lockout status.
- Electronic maximum fixed stop limit.
- Clear cover allows set point and differentials to be read (but not adjusted) without opening the cover.

Specifications:

- PressureTrol Controller with On/Off control, modulate and safety high limit.
- Power Input: 120 Vac (+10% /-15%), 50/60 Hz (±10%).
- Output Impedance: 300 ohm maximum.
- Sensor Material: 304 stainless steel.
- Pressure Connector: 1/2 in. NPT.
- Case Material: Plastic.
- Electrical Terminations: Screw terminals.
- Accuracy: ±4.0 percent full scale output operating range, over operating temperature.
- Operating Temperature Range: 32°F to 140°F (0°C to 60°C).
- Storage Temperature Range: -20°F to +150°F (-29°C to +66°C).
- Humidity: 5% to 95% relative humidity, noncondensing.
- Vibration: 0.5G continuous maximum vibration.
- Make all pipe connections in accordance with applicable local standards. Use parallel jaw wrench to tighten P7810 Controller hexagonal fitting to avoid leaks and damage to the case.
- All wiring must comply with applicable electrical codes, ordinances and regulations. Use NEC Class 1 line voltage wiring.
- For nominal installation, use moisture-resistant No. 14 wire (maximum size allowed) suitable for at least 167°F (75°C) or 194°F (90°C) for Flame Safeguard Primary Controls.
- Use shielded wire for 4 to 20 mA modulating output and terminate the shield to earth ground. Do not run these wires in the same conduit as high voltage ignition wires.
- All P7810 PressureTrol Controllers have terminal screws and 27/32 in. (22 mm) holes in both sides for conduit, cables and wiring. Remove the top cover by loosening the screw at the top of the P7810 Controller case.
- Follow the burner or boiler manufacturer wiring diagram, if provided. Make sure the loads do not exceed the contact ratings in the Specifications section.
- Approvals:
- Underwriters Laboratories Inc.: Listed; MP446-30-1.
- Canadian Standards Association Certified; 158158-1355621.
- Factory Mutual Approved: Approved; 3018936.
- CSD-1 AFB (Control Safety Devices, Automatic Fired Boilers): Acceptable.
- FCC Class B, computing devices, part 15.

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