Related Manuals for Trane VariTrane VAV-SVX02B-EN
Summary of Contents for Trane VariTrane VAV-SVX02B-EN
- Page 1 Installation/ Operation Maintenance ™ VariT rane Pneumatic Controls VAV-SVX02B-EN March 2002...
- Page 2 The one-pipe thermostat (Figure 2) requires an external restrictor tee. Connect main air supply to restricted leg of restrictor tee. Connect branch line from restrictor tee to the thermostat. Thermostat Figure 1–Two-Pipe Remote Thermostat (Reverse-Acting) Figure 2–Typical One-Pipe Thermostat (Reverse-Acting) VAV-SVX02B-EN...
- Page 3 25psi (172 kPa) Maximum Safe Air Temperature: 150°F (66°C) Throttling Range: 2–10°F (1–5°C) Gain: 2.5 psi/°F Adjustable VAV-SVX02B-EN Thermostat Operation Pneumatic thermostats modulate output air pressure in response to room air temperature. Pneumatic thermo- stats fall into two categories: direct- acting or reverse-acting.
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Page 4: Reversing Relay
Figure 5–Pneumatic Reversing Relay Trane Part No. RLY-755 The reversing relay requires three piping connections: main/supply air, input signal air, and output branch air (see Figure 6). - Page 5 3/16" (4.& mm) nipples for ¼" (6.4 mm) OD polyethylene tubing Air Consumption: 0.5 SCFH (.236 L/M) @ 20 psig Material: Weight: 3 ½ oz VAV-SVX02B-EN Reversing Relay Figure 8–Recalibrating Reversing Relay Gage Ambient Limits: +40°F/+120°F operating (+4°C/+49°C) Mounting: In-line via air connections Factory Settings: 9 psig in./9 psig out and 8 psig in./8 psig...
- Page 6 Figure 10–Typical Piping Diagram of Normally-Open or Normally-Closed Unit Selecting Direct- or Reverse-Acting Thermostat (3011) The model 3011 PVR must be calibrated to operate with either a direct-acting or reverse-acting thermostat. The control must also be changed when used with a normally-open or normally-closed air valve. VAV-SVX02B-EN...
- Page 7 2. Apply 20 psi to port “T” . 3. Adjust reset span to indicate the desired span on port “G” (see Figure 12). 4. LO-stat and HI-stat delta P must now be readjusted (see following calibration procedure) Figure 12– Adjusting Reset Span VAV-SVX02B-EN Model 3011—Pneumatic Volume Regulator...
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Page 8: Calibration Procedures
8. Monitor the delta P and adjust the HI-stat (mini- mum) adjustment to desired minimum flow. 9. Set port “T” at 0 psi. 10.Monitor the maximum flow delta P . If it is not correct, adjust the LO-stat adjustment knob. VAV-SVX02B-EN... -
Page 9: Specifications
Minimum Setpoint Range: 0 to 1.0" H Maximum Setpoint Range: minimum to 1.0 in. wg Operating Static Range: 0.25–6.0 in. wg VAV-SVX02B-EN Specifications (3011) Normal Supply Air Pressure: 20.0 psi Minimum Supply air Pressure: 15.0 psi Maximum Supply Air Pressure: 30.0 psi... - Page 10 1. Connect an accurate gage to port “G” . 2. Apply 20 psi to port “T” . 3. Adjust reset span to indicate the desired span on port “G” . 4. LO-stat and HI-stat delta P must now be readjusted (see following calibration procedure). VAV-SVX02B-EN...
- Page 11 P . If it is not flow delta P . If it is not correct, adjust the LO-stat correct, adjust the LO-stat adjustment knob. adjustment knob. VAV-SVX02B-EN Calibration Procedures Direct-Acting Thermostat 5. Set port “T” at 0 psi. 6. Monitor the delta P and...
- Page 12 15.0 psi Maximum Supply Air Pressure: 30.0 psi Specifications (3501) Output Sensitivity: 5 psi/.02 Average Supply Air Consumption: 43.2 scim at 20 psi Reset Start Point Range: 0–10 psi Reset Span Range: 0–7 psi Operating Temperature: +40/+120°F Storage Temperature: -40/+140°F VAV-SVX02B-EN...
- Page 13 Models: MCP-3631-5000 8–13 psi range (55–90 kPa) Normally-Closed operation MCP-3631-8000 3–8 psi range (21–55 kPa) Normally-Open operation VAV-SVX02B-EN MCP-3631—Rotary Pneumatic Damper Actuator Installation Method: Slide collar onto shaft. Slide actuator onto shaft noting directional rotation. Slide bushing onto shaft into actuator,...
- Page 14 3. Set t-stat to full cool. 4. Set HI thermostat (minimum) to the desired minimum flow on the heating deck. 5. Set LO thermostat adjustment knob on cooling deck (CV deck) to desired constant-volume. 6. Exercise the system to check flows for proper operation. VAV-SVX02B-EN...
- Page 15 Figure 17–Example N.O. Heating Valve Min 0 cfm Max 1000 cfm Unit Min Valve Min VAV-SVX02B-EN Variable Air Volume Dual-Duct Calibration (3011) Figure 16–Typical VAV Dual-Duct Piping Diagram Thermostat Range: 3–8 psi Heating Valve = 5 psi range Thermostat Range: 8–13 psi...
- Page 16 Stocking Location La Crosse Trane has a policy of continuous product and product data improvement and reserves the right to change design and specifications without notice. Only qualified technicians should perform installation and servicing of equipment referred to in this publication.