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Trane VAV-SVX02B-EN manual

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Table of contents for the manual

  • Page 1

    Ins talla ti on/ Op er a t ion Maint enan c e V ar i T r ane ™ Pne umati c Con tr ols V A V -S V X0 2 B-EN March 2002[...]

  • Page 2

    V A V -SVX02B-EN Thermost at Selec tion and Location In general, both one- and two-pipe thermost ats have a gain of 2.5 psi per degree F ahrenheit, unless special thermosta ts are used that provide a different g ain. The major dif ference betwe en them is that a one-pipe thermos t at is considered a low- capacity thermostat and a two-pipe thermosta[...]

  • Page 3

    3 V A V -SVX02B-EN Thermostat Specif icat ions TP970 S eries Pneumatic T -stats Maximum Safe Air Pressure: 25psi (172 kPa) Maximum S afe Air T emperature: 150°F (66°C) Throttling Range: 2–1 0°F (1–5°C) Gain: 2.5 psi/ °F Adjustable Ope ra t ion Pneumatic thermost ats modulate out put air pressure in respons e to room air temperature. Pneuma[...]

  • Page 4

    V A V -SVX02B-EN Inst alla tion and Oper a t ion The reversing relay is a proportional, non-bleeding device for use in pneu- matic control systems where a propor - tional signal from a controlling device must be reversed (see Figure 5). The most common use of the reversing relay is to c hange the action of a pneumatic thermostat. F igure 5 – Pneu[...]

  • Page 5

    5 V A V -SVX02B-EN Re v er sing Rela y Calibrat ion By using the “bias” adjustment on the relay , t he factory-set 8.0 – 9.0 “cross- over” can be c hanged. T o recalibrate, the relay should be connected as illustrated in F igure 8. F igure 8 – Rec a libra ting Reve rsing Re lay If the new desired “cross-over” pressure is 1 1 .0 psi,[...]

  • Page 6

    V A V -SVX02B-EN Model 30 1 1 The model 30 1 1 Pneumatic V olume Regulator (PVR) is capable of operating with normally-open or normally-closed air valves and can operate with either direct-acting (DA) or reverse-acting (RA) thermostats. F igure 9 – Accepta ble Installa tion Positions Ins ta lla tion 1 . Att a ch brac k et eit her vertically or ho[...]

  • Page 7

    7 V A V -SVX02B-EN Use the following procedure to set-up the PVR: 1 . Select damper action (NO or NC). Loosen damper selection switc h screw and align to either the NO or NC pointer with damper pointer and tighten screw. 2 . Now determine the type of thermostat that will be used. If a direct-acting thermost at is used, the reset start pressure is t[...]

  • Page 8

    V A V -SVX02B-EN Calibration P r oced ur es Calibr a ti on P roc e dure (Steps 1– 4 apply to all ther mos t a t m odels) 1 . Be sure the PVR is installed correctly and that all connections are hooked up to the proper ports. See Figure 9 for unit appl ication. 2 . Remove the caps on the tees whic h are connected to the lines to the flow sensor . C[...]

  • Page 9

    V A V -SVX02B-EN 9 Spe cifica tions (30 1 1) Differential Pressure Range: 0 to 1 .0 in. wg Minimum Set point Range: 0 to 1 .0" H 2 O Maximum Set point Range: minimum to 1 .0 in. w g Operating Static Range: 0.25 – 6.0 in. wg Sp e cif ic ations (30 1 1) Normal Supply Air Pressure: 20.0 psi Minimum Supply air Pressure: 15.0 psi Maximum Supply A[...]

  • Page 10

    V A V -SVX02B-EN 10 Model 350 1 The model 350 1 Pneumatic V olume Regulator (PVR) is capable of operating with normally-open or normally-closed air valves and can operate with either direct-acting (DA) or reverse-acting (RA) thermostats. Adjusting the Reset Span (350 1) The reset span is factory-set at 5 psi. This is the thermostat pressure differ [...]

  • Page 11

    V A V -SVX02B-EN 11 Calibration P r ocedures Calibr ation Pr oce dure (Steps 1– 4 apply to all ther mostat models) 1 . Be sure the PVR is installed correctly and that all connections are hooked up to the proper ports. 2 . Remove the caps on the tees, whic h are connected to the lines to the flow sensor . Connect a 0 –2" magnehelic gage to [...]

  • Page 12

    V A V -SVX02B-EN 12 Spec if ica t ions (350 1) Differential Pressure Range: 0 to 1 .0 in. wg Minimum Setpoint Range: 0 to 1 .0" H 2 O Maximum Setpoint Range: minimum to 1 .0 in. w g Maximum Setpoint Range: 6.0 in. wg Normal Supply Air Pressure: 20.0 psi Minimum Supply air Pressure: 15.0 psi Maximum Supply Air Pressure: 30.0 psi Spe ci f ic a t[...]

  • Page 13

    V A V -SVX02B-EN 13 MCP -3631—Rotary Pneumatic D amper Ac tuat or Desc ription: Rotary actuators mounts to a standard ½" diameter shaf t by a loc king collar and bushing. Mod e ls: MCP -3631-50 0 0 8 –13 psi range (55–90 kPa) Normally-Closed operation MCP - 3631-800 0 3 – 8 psi range (21– 55 kPa) Normally-Open operation Insta llatio[...]

  • Page 14

    V A V -SVX02B-EN 14 Constant V ol ume Dual-Duct Calibration (30 1 1) This calibration procedure is used when a constant volume of air must be maintained through a unit. On a dual- duct unit, a constant-volume disc harge sensor is used to measure the air leaving the unit. The PVR controlling to a constant-volume of air leaving the unit uses the disc[...]

  • Page 15

    V A V -SVX02B-EN 15 Thermostat Range: 3 – 8 psi Heating V alve = 5 psi range Thermostat Range: 8 –13 psi Cooling V alve = 5 psi range Approximately 1 0 0 0 cfm di vided by 5 psi = 200 cfm/1b* *Due to the relationship between velocity pressure and cfm; for both the cooling and heating PVR, a linear relationship between cfm and psi does not exist[...]

  • Page 16

    T rane An American Standard Company www.trane.com For more information contact your local district office or e-mail us at comfort@trane.com Liter ature Order Number V AV - S V X02B - EN Fil e Number SV -T D-V A V0 0 0 - SVX02B - EN- 0 302 Supe r s ede s V A V -SVX02A-EN & VA V -IOM-6 St oc king Loc at ion La Crosse T rane has a poli cy of conti[...]