PIM Pressure Independent Module PIM : Product Overview BENEFITS AT A GLANCE QUIET VAV DIFFUSER OPERATION The PIM Pressure Independent Module is a modulating static pressure controller/actuator that allows Therma-Fuser TM Diffusers to operate quietly at both full flow and turn down conditions. The PIM has a field adjustable static pressure set point and may be used in either a zone or bypass configuration. EASY INSTALLATION Featuring single point electrical and pressure tubing connections, the PIM is quick and easy to install. The PIM is available as a stand-alone or networked device and a variety of damper shapes and sizes are available so that it can be incorporated into any ductwork system. BACnet TM COMPATIBLE Integration over the BACnet network provides extensive data from each PIM including: static pressure, static pressure set point, and damper position. Simple, plug-and-play RJ-45 connections with factory supplied cables ensure correct connection to the BACnet network.
HOW IT WORKS The Pressure Independent Module (PIM) regulates pressure within a Therma-Fuser diffuser system. The PIM makes use of an electronic pressure controller (PIC) to modulate a damper in response to the system static pressure setpoint and a downstream pressure probe. The PIM can be setup for either bypass control or for downstream zone control. In both applications, duct static pressure should be kept below 0.25 in. w.g. at the diffuser closest to the PIM to limit excessive diffuser noise. DIGITAL PRESSURE CONTROLLER (PIC) With advanced and configurable PI (Proportional + Integral) control, the PIC allows for exceptional user comfort and energy efficiency by eliminating hunting and overshoot. Installation of the controller is quick and easy with simple RJ-45 connections to the BACnet network. Field setup changes can be accomplished with the LCD thermostat setup tool or through BACnet front end software. The PIC comes standard with the following features: 1. Integrated actuator. 2. Service jack for setup/balancing. 3. Expansion modules for additional functionality when required. 4. Indicator LEDs that show the status of all outputs for easy troubleshooting. 5. Pressure sensor module that provides accurate duct static pressure readings for reliable control. 6. Stand-alone or BACnet network operation (with optional native BACnet MS/TP expansion module) for integration into any system. 7. RJ-45 connections for quick and easy connection to the BACnet network with factory supplied cables. PIC Digital Pressure Controller INTEGRATION WITH BACnet With native BACnet MS/TP compatibility, the PIC controller can tie into an existing or future BACnet compliant BAS system for maximum flexibility. When connected, the network can monitor all of the controller's functions and variables, assign set-points or log historical data. A computer on the BACnet network can be used to configure PIC controllers instead of the local LCD setup tool. GUIDE SPECIFICATION Available for download at acutherm.com Pressure Controller (PIC) Pressure Probe 2
PIM Pressure Independent Module SYSTEM DESIGN BYPASS APPLICATION Bypass control maintains a constant pressure setpoint and bypasses the air from the supply to the return side. The return duct can either be ducted back to the main air handling unit or have an open return. In this application, the PIM should be installed between the supply and return duct, and the static pressure should be measured 2/3 to 3/4 of the way down the longest duct run. When the static pressure in the duct increases past the setpoint, the PIM will open the damper to increase the amount of air bypassed. On a decrease in duct static pressure, the controller will close the damper to reduce the amount of air bypassed, thereby holding the duct static pressure constant. BAS Computer for BACnet Op on AHU PIM Supply Air Temperature Sensor Therma-Fuser Diffusers ZONE APPLICATION In the zone application the PIM is located directly in the supply duct before the first Therma-Fuser diffuser. The static pressure probe is placed downstream of the PIM unit, allowing the damper to maintain a constant downstream pressure setpoint through modulation of an internal damper. To maintain the desired duct static pressure, the controller will close the damper in response to an increase in duct static pressure to restrict airflow, while in response to a decrease in duct static pressure the controller will open the damper to increase airflow. BAS Computer for BACnet Op on Supply Air Temperature Sensor PIM Sta c Pressure Sensor Therma-Fuser Diffusers 3
DIMENSIONAL DATA PIM - Round Dimensional Data Unit Size L/s Range cfm Range I-P Units (in.) S.I. Units [mm] A L A L 6 0-212 0-450 6 20 3/8 152 518 8 0-378 0-800 8 20 3/8 203 518 10 0-637 0-1350 10 20 7/8 254 530 12 0-991 0-2100 12 23 1/8 305 587 14 0-1416 0-3000 14 24 1/8 356 613 16 0-188 0-4000 16 26 1/8 406 664 Notes: PIM enclosure assembly will be supplied on right hand side unless specified otherwise. PIM - Rectangular Dimensional Data I-P Units [in.] S.I. Units [mm] W H W H Min. Max. Min. Max. Min. Max. Min. Max. 6 48 6 36 152 1219 152 914 W 5 3/4" (146) 10" (254) H 13 1/4' (337) 7/8" (22) 5" (127) 4 DAMPER DIMENSIONS W H MIN MAX MIN MAX 6" (152) 48" (1219) 6" (152) 36" (914)
DISCHARGE SOUND DATA - PIM ROUND Unit Size 6 8 10 12 14 16 Air Flow 0.5 in. w.g. [125 Pa] Sound Power Levels Lw db Re 10-12 Watts 1.0 in. w.g. [250 Pa] 2.0 in. w.g. [500 Pa] 3.0 in. w.g. [750 Pa] L/s cfm 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7 94 200 51 52 49 47 42 38 56 57 53 50 47 44 60 61 58 54 51 50 63 63 61 56 54 53 118 250 54 56 51 50 45 41 58 60 56 53 49 46 63 64 61 57 54 52 66 66 63 59 57 56 165 350 58 60 55 54 49 44 62 65 60 58 53 50 67 69 64 61 58 56 69 71 67 64 60 59 212 450 60 64 58 58 51 47 65 68 62 61 56 52 69 72 67 65 61 58 72 75 70 67 63 62 189 400 55 51 50 49 45 41 59 56 55 52 50 48 64 61 59 56 55 54 67 64 62 58 58 57 236 500 57 54 53 52 48 43 62 59 58 56 53 49 67 64 62 59 57 56 69 67 65 61 60 59 283 600 59 56 56 55 50 45 63 61 60 58 55 51 68 66 65 62 59 57 71 69 67 64 62 61 330 700 60 58 58 57 52 46 65 63 62 60 56 52 70 68 67 64 61 58 73 71 69 66 64 62 378 800 61 60 59 59 53 47 66 65 64 62 58 53 71 70 68 66 63 59 74 73 71 68 65 63 260 550 55 51 49 44 46 46 60 55 53 48 51 52 64 59 57 53 55 58 67 62 59 55 57 61 354 750 58 55 53 47 49 48 63 59 57 52 54 54 67 64 61 56 58 60 70 66 64 59 60 63 448 950 61 58 57 50 52 49 65 63 61 55 56 55 69 67 65 59 60 61 72 70 67 62 63 64 543 1150 63 61 59 53 54 50 67 65 63 57 58 56 71 70 67 61 62 62 74 72 69 64 65 66 637 1350 64 63 62 55 55 51 69 68 65 59 59 57 73 72 69 63 64 63 76 75 72 66 66 66 425 900 56 51 51 47 46 44 61 56 55 51 50 50 65 60 58 55 55 56 68 63 60 57 58 60 614 1300 60 55 56 52 50 47 65 60 60 56 54 53 69 65 63 60 59 59 72 68 66 62 62 63 708 1500 62 57 58 54 51 48 67 62 62 58 56 54 71 67 65 62 61 60 74 69 68 64 64 64 802 1700 64 59 60 55 53 49 68 63 63 59 58 55 72 68 67 63 62 61 75 71 69 66 65 65 991 2100 66 61 63 58 55 51 70 66 66 62 60 57 75 71 70 66 65 63 78 73 72 68 67 66 472 1000 58 51 49 45 45 44 63 56 53 49 50 49 67 60 57 54 55 54 70 63 59 56 58 57 708 1500 63 56 55 50 49 47 68 60 59 54 54 52 72 65 63 59 59 57 75 68 65 61 62 60 944 2000 67 59 59 54 52 49 71 64 63 58 57 54 76 69 67 62 62 59 79 72 69 65 65 62 1180 2500 70 62 62 56 54 51 74 67 66 61 60 56 79 71 70 65 65 61 81 74 72 68 68 64 1416 3000 72 64 64 59 56 52 76 69 68 63 61 57 81 74 72 67 67 62 84 76 75 70 69 66 708 1500 59 53 51 47 49 47 64 58 55 52 54 52 68 62 59 57 59 57 71 65 62 60 62 59 944 2000 63 57 55 50 51 49 67 61 59 55 56 54 72 66 63 60 61 58 74 69 66 63 64 61 1180 2500 66 60 58 53 53 50 70 64 62 58 58 55 74 69 66 63 63 60 77 72 69 66 66 63 1416 3000 68 62 61 55 55 51 72 67 65 60 60 56 77 71 69 65 65 61 79 74 71 68 68 64 1652 3500 70 64 63 56 56 52 74 68 67 62 61 57 79 73 71 67 66 62 81 76 73 70 69 65 1888 4000 71 66 65 58 57 53 76 70 69 63 62 58 80 75 73 68 67 63 83 78 75 71 70 65 Performance Notes: 1. Test data obtained in accordance with ARI Standard 880-98 and ASHRAE Standard 130-1996. 2. Air flow is given in L/s and cfm. 3. Pressure given in Pa and in. w.g. 5
RADIATED SOUND DATA - PIM ROUND Unit Size 6 8 10 12 14 16 Air Flow 0.5 in. w.g. [125 Pa] Sound Power Levels Lw db Re 10-12 Watts 1.0 in. w.g. [250 Pa] 2.0 in. w.g. [500 Pa] 3.0 in. w.g. [750 Pa] L/s cfm 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7 94 200 38 33 32 33 31 28 42 35 36 37 37 35 46 38 40 41 43 42 48 40 42 44 47 46 118 250 39 34 35 35 32 29 43 37 39 39 38 36 47 40 42 43 45 43 49 42 45 46 48 47 165 350 40 37 38 38 34 31 44 40 42 42 40 38 48 43 46 46 47 44 50 45 48 49 50 48 212 450 41 40 40 40 36 32 45 42 44 44 42 39 49 45 48 48 48 46 51 47 50 51 52 50 189 400 37 30 36 33 34 29 42 35 39 37 40 36 47 39 43 41 46 44 50 42 45 43 50 48 236 500 39 33 38 35 35 30 44 37 42 39 42 38 49 42 46 43 48 45 52 44 48 45 52 50 283 600 40 35 40 37 37 31 45 39 44 41 43 39 50 44 48 45 50 46 53 46 50 47 53 51 330 700 42 36 42 39 38 32 46 41 46 43 44 40 51 45 50 46 51 47 54 48 52 49 54 52 378 800 43 38 44 40 39 33 47 42 48 44 45 41 52 47 51 48 52 48 55 49 54 50 56 53 260 550 41 33 36 36 36 30 44 36 40 40 41 37 47 38 43 44 47 44 49 40 45 47 51 48 354 750 43 37 40 38 38 32 46 40 43 43 44 39 49 42 47 47 50 46 51 44 49 50 54 50 448 950 44 40 43 40 40 33 47 43 46 45 46 40 50 46 50 49 52 49 52 47 52 52 56 52 543 1150 45 43 45 42 42 34 48 45 48 47 48 42 51 48 52 51 54 49 53 50 54 54 57 53 637 1350 46 45 47 44 43 35 49 48 50 48 49 43 52 50 54 52 55 50 54 52 56 55 59 54 425 900 38 37 35 33 32 29 43 39 39 37 38 36 47 41 42 41 44 44 50 42 44 44 48 48 614 1300 41 41 40 37 35 32 45 43 43 41 41 39 50 45 47 46 47 46 52 47 49 48 51 50 802 1700 43 44 44 40 38 34 47 46 47 44 44 41 52 48 50 49 50 48 54 50 52 51 53 52 897 1900 44 46 45 41 39 35 48 48 49 45 45 42 53 50 52 50 51 49 55 51 54 52 54 53 991 2100 45 47 47 42 40 36 49 49 50 47 46 43 53 51 53 51 52 50 56 52 55 53 55 54 472 1000 40 34 38 36 35 32 43 39 43 42 41 38 46 44 47 47 46 45 48 47 50 50 50 49 708 1500 44 38 42 40 38 34 48 43 47 45 44 41 51 48 51 51 50 48 53 50 54 54 53 52 944 2000 47 41 45 42 40 36 51 46 50 48 46 43 54 50 54 53 52 49 56 53 57 56 55 53 1180 2500 50 43 47 44 41 38 53 48 52 50 47 44 56 53 56 55 53 51 58 55 59 58 57 55 1416 3000 52 45 49 46 43 39 55 50 54 51 49 45 59 54 58 57 55 52 60 57 61 60 58 56 708 1500 41 37 40 40 39 36 44 42 45 44 44 42 48 48 50 48 49 48 50 51 52 51 53 52 944 2000 44 40 44 42 42 38 48 45 49 47 47 44 52 51 53 51 52 50 54 54 56 54 55 54 1180 2500 47 43 47 45 44 39 51 48 51 49 49 45 54 53 56 53 54 52 56 56 59 56 57 55 1416 3000 49 45 49 46 45 40 53 50 54 51 50 47 57 55 58 55 55 53 59 58 61 58 58 57 1652 3500 51 46 51 48 46 41 55 51 56 52 52 48 58 56 60 57 57 54 61 59 63 59 60 58 1888 4000 53 48 53 49 48 42 57 53 57 54 53 49 60 58 62 58 58 55 62 61 65 60 61 59 Performance Notes: 1. Test data obtained in accordance with ARI Standard 880-98 and ASHRAE Standard 130-1996. 2. Air flow is given in L/s and cfm. 3. Pressure given in Pa and in. w.g. 6
RECOMMENDED AIR VOLUME RANGES - PIM ROUND SELECTION For zone applications, the PIM is sized in accordance with the design flow through the duct run supplied by the PIM. Selecting the PIM in the mid range will allow for future changes. For bypass applications, the PIM is sized to handle the bypass air volume when all of the Therma-Fuser diffusers turn down for the zone or branch controlled by the PIM. This will typically be 100% of maximum design flow minus any minimum flow set at the diffusers. FIELD ADJUSTMENT OF PRESSURE CONTROLLER The pressure controller set-point will be determined by the actual pressure losses of the branch duct and diffusers, and cannot be accurately predicted. Field adjustment of the PIM setpoint is done using the LCD setup tool or BACnet interface. The PIM pressure controller is factory set for a default value of 0.3 in. w.g. / 75 Pa. Quick Selection - Round Dampers Unit Size Max cfm at 2000 fpm Max l/s at 10.2 m/s 6 393 185 8 698 329 10 1090 514 12 1570 741 14 2137 1008 16 2791 1317 MINIMUM OPERATING PRESSURE Unit Size 6 8 10 Air Flow Min. Ps L/s cfm Pa in. w.g. 94 200 10 0.04 118 250 19 0.08 165 350 37 0.15 212 450 55 0.22 189 400 7 0.03 236 500 12 0.05 283 600 17 0.07 330 700 23 0.09 378 800 28 0.11 260 550 4 0.02 307 650 11 0.04 401 850 18 0.07 543 1150 24 0.10 637 1350 31 0.13 Performance Notes: 1. Test data obtained in accordance with ARI Standard 880-98 and ASHRAE Standard 130-1996. 2. Air flow given in L/s and cfm. 3. Pressure given in Pa and in. w.g. Unit Size 12 14 16 Air Flow Min. Ps L/s cfm Pa in. w.g. 425 900 3 0.01 614 1300 8 0.03 708 1500 11 0.04 802 1700 14 0.05 991 2100 19 0.08 472 1000 2 0.01 708 1500 8 0.03 944 2000 15 0.06 1180 2500 22 0.09 1416 3000 28 0.11 708 1500 4 0.01 944 2000 9 0.03 1180 2500 14 0.06 1416 3000 19 0.08 1652 3500 24 0.10 1888 4000 29 0.12 7
Steel PIM Pressure Independent Module RECOMMENDED OPERATING PRESSURE - PIM RECTANGULAR Damper size* Max cfm at 1000 fpm Max l/s at 5.1 m/s 12x12 1000 472 18x16 2000 943 24x16 3000 1415 30x24 5000 2358 36x30 7500 3538 48x30 10000 4717 *Square/rectangular dampers are available in a wide variety of sizes in addition to those shown. PRESSURE DROP - PIM RECTANGULAR Pressure drop testing was conducted by an independant laboratory in accordance with AMCA Standard 500-D, Fig. 5.3 ductwork upstream & downstream. LEAKAGE - PIM RECTANGULAR Leakage Performance test was conducted by an independant laboratory in accordance with AMCA Standard 500-D and is expressed as CFM/SQ. FT. of damper face area. Test size: Damper size 36 x 48. 8 ns ( ) are soft conversion. Copyright E.H. Price Limited 2012. s are converted to metric and rounded to the nearest millimetre.
2017 Acutherm PIM Pressure Independent Module TWO YEAR WARRANTY Acutherm warrants that its PIM (Pressure Independent Module), exclusive of any options and accessories (whether factory or field installed) shall be free from defective material or workmanship for a period of two (2) years from the date of shipment and agrees to repair or replace, at its option, any parts that fail during said two (2) year period due to any such defects which would not have occurred had reasonable care and proper usage and all parts and controls remain unaltered. Acutherm makes NO WARRANTY OF MERCHANTABILITY OF PRODUCTS OR OF THEIR FITNESS FOR ANY PURPOSE OR ANY OTHER EXPRESS OR IMPLIED WARRANTY WHICH EXTENDS BEYOND THE LIMITED WARRANTY ABOVE. ACUTHERM S LIABILITY FOR ANY AND ALL LOSSES AND DAMAGES RESULTING FROM DEFECTS SHALL IN NO EVENT EXCEED THE COST OF REPAIR OR REPLACEMENT OF PARTS FOUND DEFECTIVE UPON EXAMINATION BY ACUTHERM. IN NO EVENT SHALL ACUTHERM BE LIABLE FOR INCIDENTAL, INDIRECT OR CONSEQUENTIONAL DAMAGES OR DAMAGES FOR INJURY TO PERSONS OR PROPERTY. Acutherm shall not be responsible for freight to or from its plant in connection with the inspection, repair or replacement of parts under the terms of this limited warranty nor for cost of removal or installation. ACUTHERM PRODUCT GUIDE Square VAV Diffusers Round VAV Diffusers Linear VAV Diffusers Options and Accessories Pressure Control PRODUCT INFORMATION DESCRIPTION Use the following model number nomenclature to order PIM Pressure Independent Modules, options and accessories. (1) Model PIM (2) Units (3) Configuration (4) Round Inlet Size (5) Rectangular Inlet Size Product 1. Model: PIM Pressure Independent Module 2. Units: IN Inches, MM Milimeters 3. Configuration: PIC PIC Only, PIC+SQ PIC and Square or Rectangular Damper, PIC+RD PIC and Round Damper 4. Round Inlet Size: 6, 8, 10, 12, 14, 16 Inch Inlet 5. Rectangular Damper Size: Damper Width x Damper Height Options (1) Control Configuration (2) Transformer (3) Network Options 1. Control Configuration: B Bypass Control, Z Zone Control 2. Transformer: 24-24V DDC Isolation, 120-24V Step Down, 230-24V Step Down 3. Network: BAC Native BACnet MS/TP Interface Accessories (1) Blade Seals (2) Transitions Accessories 1. Blade Seals: LL Low Leakage Blade Seals 2. Transitions: STR Square to Round Inlet, RTS Round to Square Outlet AVAILABLE ONLINE Access digital brochures, CAD files, performance data and more! www.acutherm.com CALL US Talk to our customization and specification experts +1 800 544 1840 EMAIL SUPPORT Send us your questions and we ll get you the answers you need. techsupport@acutherm.com ACUTHERM HEADQUARTERS 1766 Sabre Street Hayward CA 94545, USA Tel: +1 510 785 0510 Fax: +1 510 785 2517