Model SRPM Room Pressure Monitor Installation and Operating Manual 1
Setra SRPM Room Pressure Monitor The Setra SRPM Room Pressure Monitor is designed for critical low differential pressure applications that require stringent pressure monitoring and alarming. The SRPM can be configured to monitor positive, negative or neutral pressure in protected environments and hospital isolation rooms per CDC guidelines.
Table of Contents 1.0 Intended Use ..................................................................................4 1.1 Specifications ............................................................................4 1.2 SRPM Function .........................................................................5 2.0 Parts ..............................................................................................6 2.1 SRPM Included parts ................................................................6 2.
1.0 INTENDED USE The SRPM is designed to monitor critical environments by providing differential pressure indication. Typically this is between a monitored room and a reference space such as a corridor or ante room. The unit also provides monitoring, alarm and communications functions. Installation must be indoors, Polution Degree 2, Installation Category II. Typical Applications: 1. Hospitals – patient isolation and protection rooms, operating suites, intensive care, and emergency rooms. 2.
1.2 SRPM FUNCTION The SRPM senses very low differential pressure using high accuracy capacitive sensor technology. The pressure difference for these applications is the difference in static pressure between a critical environment room and its surrounding reference area (usually a hallway or another room). Maintaining and monitoring a static room pressure difference ensures that the critical environment room is either protected or isolated from a surrounding environment.
2.0 PARTS 2.1 SRPM (Setra Room Pressure Monitor) INCLUDED PARTS Quantity 1 SRPM assembly 2 Barbed Couplings, Brass, Plated 2 1/4 inch Tubes, Silicone 4 6-32 x 1/2” Mounting Screws for connecting the SRPM Base to the plaster ring 2.2 SRAN (Setra Remote Annunciator) INCLUDED PARTS Quantity 1 Annunciator Assembly 2.3 RPS (Room Pressure Snubber) INCLUDED PARTS Quantity 1 Room pressure snubber Assembly 2.
3.0 INSTALLATION (See Section 8.0 for overview) ! For 120/240 VAC Version, only CAUTION: Do not open or remove SRPM cover (tool required) with input power applied unless performed by a licensed electrician. “Hazardous Live” voltage is present at connector J3 when power is applied. Please observe the warning symbol ( ! ) near the J3 power connector. The SRPM is designed to be mounted on a standard double gang metal electrical box using a 4 x 4 inch plaster ring adaptor.
Power leads, analog output, door status, and annunciator wiring should be 14 to 22 AWG stranded wire. BACnet suggested wiring is 22 AWG stranded wire in a shielded cable, a +,-, Gnd (S) and shield should be run. This can be 2 twisted pairs with a separate cable shield. One twisted pair is used for communications, the second twisted pair can be used for communications ground and the shield wire can be connected to the other device shield wires.
3.2 PLUMBING (ATTACHING PRESSURE TUBING) Warning: Always attach tubing to the SRPM header and then place Header onto SRPM. This will prevent overpressure from crimped or collapsed tubes. Use the following procedure for all room types: positive, negative or neutral: Typically a Room Pressure Snubber (RPS) is installed in the monitored room. Often stiff nylon ¼” tubing is used for running pressure signals from the SRPM to the monitored spaces.
3. 3 WIRING, FINISH 3.3.1 ALARM RELAY OUTPUT The Single Pole Single Throw (SPST) relay output can be used for remote signaling of alarm condition. A form “C” contact rated at 1A is available. Connect to J4, P1 and P4 (See Section 8.0 for Diagram of J4). This relay can be used as a dry contact for remote indication or can drive an SRAN remote annunciator. 3.3.
Audible Alarm Potentiometer The volume control on the Annunciator is a potentiometer that can be adjusted from 0 to 85 dB. Using a small flat bladed screwdriver, rotate potentiometer (remote annunciator PC board) clockwise to increase volume and counterclockwise to decrease volume. 3.3.3 DOOR STATUS SWITCH WIRING Install the door switch into the door jamb. Wire to the normally open (N.O.) side of the door jamb contact switch. The SRPM will indicate the status of door position.
Voltage Output +● 1. V Out: 0 to 5, 0 to 10 VDC 2. C Out: 4 to 20 mA Receiver (V) –● 3. Common 3.3.5 BACnet BACnet hardware is implemented as isolated RS485. Wire to Connector J2, labeled RS-485. Connect tx line to +(A), rx to –(B) and ground wires to S. Connect Shields together with wire nut. Hardware configuration is done using a 5 position dip switch (S1) located in the upper right hand section of the PCBA as well as through the touch screen interface, see Section 4.4. and 4.9.
4.0 STARTUP AND OPERATION The SRPM is designed with as an easy to use, intuitive, touch screen interface. In its normal (default) state the Monitoring Screen displays the actual room static pressure, also a slider bar shows the actual pressure relative to the alarm limits. The RGB backlight is used to indicate the condition of the room. The buttons at the bottom of the screen give you access to the functions that can be performed. 4.1 MENU TREE See section 9.0 4.
The following screens are configuration screens, they can be configured so that Password protection is required to make changes. If no entry is made to the screen the unit will return to the default screen after approx. 1 minute. 4.4 MAIN MENU SCREEN BUTTON Unit Room Alarm BACnet DESCRIPTION Setup Supervisor password, output, engineering units, and display averaging. Set up high and low pressure limits to monitor a positive, negative, or neutral room.Operator password setup.
4.5 SETUP UNIT OPERATION ENTERING DATA Press (or tap) button to select an output or engineering unit. Selected button background will change from clear to black. PASSWORD PROTECTION Lightly pressing (or tapping) the “Yes” button activates Supervisor password protection. With Supervisor password protection enabled, operators can not access menu screens to update setup. Pressing “No” disables password protection. Pressing “Change” will open “Password Setting Screen”.
Press Save and Exit. DATA ENTRY SCREEN Enter numbers by pressing each key in sequence until the desired character is displayed in the data entry box above the keypad. (Note: The cursor will blink for one to two seconds then stop and display the character.) Erase any mistakes by using the “Back Space” key. When finished entering data, press the “Enter” key to return to SETUP UNIT screen. Note: Use the eraser end of a pencil or back-end of a pen to press (or tap) box on screen to increase accuracy of inputs.
4.6 SETUP ROOM SCREEN SETUP ROOM OPERATION Setup alarm limits for “protective” positive room static pressure, “isolating” negative room static pressure or neutral (where the limits can be – to +). ENTERING DATA Press lightly or tap in the Lower Limit data entry box. Enter the lower limit pressure. Enter the Upper Limit pressure. The Room type box will change depending on the lower and upper limits. If both entries are positive, the room will be a Positive Room.
4.7 SETUP ALARMS SCREEN From this screen the user can access the following: a. Latched Alarm requires the pressure to return to normal and the alarm to be acknowledged before the alarm can be silenced and reset. b. Enable the audible alarm by selecting “Yes” or use visual only alarm by selecting “No”. c. Provide a “door open” warning visual indication.
4.8 SELF TEST SCREEN Self Test Operation This screen identifies the Product Model Part Number and Software Version. User can also perform a Self Test of the unit to verify that the data in protected area of the EEPROM memory hasn’t been corrupted and also test the alarm to verify the sound level and alarm setup. Press “Self Test” button to initiate EEPROM memory checksum test sequence. Press “Alarm Test” to test beeper, visual Red LED Alarm, and relay output.
4.9 CALIBRATION SCREEN CALIBRATION To re-zero the device, disconnect the electropneumatic Header H1 so that room pressures are not applied to the pressure sensor and lightly press (or tap) the “Zero” button. If a sufficiently accurate Pressure Calibrator is available, apply a steady full-scale pressure signal to the “+” on the header fitting and press (or tap) the “Span” button. Reconnect the room pressure tube and calibration is complete.
4.10 BACnet Setup Screen BACnet Setup To setup up BACnet communications, the MAC address enable switch (S1 [See Section 8]) on the dip switch must be enabled by pushing it to the right. Set MAC address, input the address of the device. Select Device Instance by inputting the device instance into the data entry box. Select baud rate by pressing the correct baud rate button, 9600 to 76800. Save and Exit to save settings or Cancel to cancel setting changes.
Click here to access ROOM MODE Screen PRESSURE MONITORING SCREENS At completion of setup, the main display will be the pressure monitoring screen, which displays the actual room static pressure.The room static pressure is shown as a number on the LCD as well as a “Moving Bar” indicator operating between the preset pressure limits. Normal room pressure conditions within the preset pressure limits are verified by a green colored screen.
5.0 REMOTE ANNUNCIATOR Green LED Audible Alarm Red LED Acknowledge Switch The Remote Annunciator provides remote indication of room status. Green LED Red LED Audible Alarm Acknowledge Switch Visual indication of normal room condition. Visual indication of a breach in room pressure protection. Beeper sounds to indicate breach in room pressure protection. Press to silence beeper. OPERATION Under normal conditions, the green LED remains on. When an alarmed condition occurs (i.e.
6.0 MAINTENANCE The SRPM is designed to operate in an indoor environment, monitoring clean, dry air. Upon final installation of the SRPM Room Pressure Monitor, no routine maintenance is required. A periodic check of system calibration is recommended. The SRPM is not field serviceable and should be returned if repair is needed (field repair should not be attempted and may void warranty). Be sure to include a brief description of the problem plus any relevant application notes.
7.0 AGENCY ELECTRICAL STANDARDS This device falls into CSA “Pollution Degree 2” for PCB insulation and CSA “Installation Category 2”. The SRPM meets the following requirements: CSA Standard C22.2 No 0-M 91: General Requirements - Canadian electrical code, Part 1 CAN/CSA C22.2 No. 0.4-04: Bonding of Electrical Equipment CAN/CSA-C22.2 No.
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10.0 RETURNING PRODUCTS FOR REPAIR Before returning the unit for repair, please contact a Setra application engineer (800-257-3872, 978-263-1400) to review information relative to your application . Many times only minor field adjustments may be necessary. When returning a product to Setra, the unit should be carefully packaged and shipped prepaid to: Setra Systems, Inc.
