TSI 8636 SUREFLOW ROOM PRESSURE CONTROLLER

Descriptions of TSI 8636

The SureFlow Room Pressure Controller Model 8636 is an ideal digital controller for laboratories with fume hoods and are designed to actually measure the room pressure differential used to prevent chemical vapors from escaping outside the lab. This controller will modulate supply and general exhaust air flows to maintain laboratory ventilation and the room pressure differential, to comply with standards such as NFPA45-2000 and ANSI Z9.5-2003.

As a stand-alone device, the Model 8636 modulates the supply and general exhaust dampers to ensure proper pressurization. It will also maintain minimum supply volumes for ventilation (Air Changes Per Hour) and cooling and controls the temperature of the laboratory space, by modulating the reheat and the supply air volume.

The Model 8636 easily integrates to the building management system using either alarm relays or digital communications. The Model 8636 supports the open Modbus® protocol.

Applications

• Laboratories

Included Items

• Digital interface module
• Through-the-wall pressure sensor
• Controller output cable, 25 ft
• Transformer, 120:24 VAC
• Transformer cable, 25 ft

Features and benefits

• Stand-alone pressure control provides system reliability
• Direct pressure measurement provides continuous, closed-loop control
• Audible and visual alarms warn staff if corrective action needed
• Network communications allow for building-wide control efficiencies
• Convenient keypad and display support local programming
• Passwords prevent unauthorized access to controller functions

Technical specifications of TSI 8636

• Display
  Range  –  -0.20000 to +0.20000 inches H2O
  Accuracy  -±10% of reading, ±0.00001 inches H2O
  Resolution – 5% of reading
  Display Update  – 0.5 sec
• Inputs
  Switch in  – SPST (N.O.) Switch. Closing switch initiates condition.
  Unoccupied switch in – SPST (N.O.) Switch. Closing switch initiates condition.
  Flow in  – – 0 to 10 VDC
  Temperature In  – 1000Ω platinum RTD  (TC: 385 Ω/100 ℃)
• Outputs
  Supply Control – 0 to 10 VDC
  Exhaust Control  – 0 to 10 VDC
  Reheat Control – 0 to 10 VDC or 4 to 20 mA
  Low Alarm Range – -0.19500 to +0.19500 inches H2O
  High Alarm Range  – -0.19500 to +0.19500 inches H2O
  Alarm Contact – SPST (N.O.)
  – Max current 2A
  – Max voltage 220 VDC
  – Maximum power 60 W
  – Contacts close in alarm condition
  RS-485 – Modbus RTU standard, N2 optional
  LON – Optional
  BACnet MSTP – Model 8636-BAC only
• General
  Operating Temperature  – 32 to 120°F
  Internal Scan Rate – 50 msec
  Input Power  – 24 VAC, 5 watts max @ 50 or 60 Hz
  – 24 VDC @ 50 or 60 Hz
  Dimensions (HWD) – 4.9 in. @4.9 in. @ 1.35 in.
  Weight – 0.7 lb.
  Pressure Sensor
  Temperature Compensation Range – 55 to 95°F
  Power Dissipation – 0.16 watts at 0 inches H2O,
  – 0.20 watts at 0.00088 inches H2O
  Dimensions (HWD) – 3.34 in. x 5.58 in. x 1.94 in.
  Weight – 0.2 lb.
• Damper/Actuator
  Type of Actuators  – Electric
  Input Power – Electric: 24 VAC
  Time for 90° Rotation – Electric: 1.5 seconds