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VAV-PRC011M-EN 31
Single-Duct VAV Terminal Units
Hot Water Reheat Coil Notes (I-P)
1. Fouling Factor = 0.00025
2. Capacity based on 55°F entering air temperature and 180°F entering water temperature. Refer
to correction factors found in
Tab le 15, p. 31 and Ta bl e 16, p. 31 for different entering
conditions.
3. The following equations may be used in calculating Leaving Air Temperature (LAT) and Water
Temperature Difference (WTD).
4. For premium coils (.020” wall), side pressure drop increasesx 17% and water velocity increases
7% for fixed GPM.
Table 15. Temperature correction factors for water pressure drop (ft)
Average Water Temperature
Correction Factor
200
0.970
190
0.985
180
1.000
170
1.020
160
1.030
150
1.050
140
1.080
130
1.100
120
1.130
110
1.150
Table 16. Temperature correction factors for coil capacity (MBH)
Entering Water Minus Entering Air
Correction Factor
40
0.32
50
0.40
60
0.48
70
0.56
80
0.64
100
0.80
125
1.00
140
1.12
150
1.20
160
1.28
180
1.44
200
1.60
Table 17. Coil only-water weights
Inlet
Size
1-Row Coil 2-Row Coil 3-Row Coil 4-Row Coil
Internal
Volume
Operating
Weight
Internal
Volume
Operating
Weight
Internal
Volume
Operating
Weight
Internal
Volume
Operating
Weight
(in
3
) (gal) (lbs) (in
3
) (gal) (lbs) (in
3
) (gal) (lbs) (in
3
) (gal) (lbs)
04 9.37 0.041 5.3 23.68 0.102 6.9 33.52 0.145 23 43.08 0.186 24
05 9.37 0.041 5.3 23.68 0.102 6.9 33.52 0.145 23 43.08 0.186 24
06 9.37 0.041 5.3 23.68 0.102 6.9 33.52 0.145 23 43.08 0.186 24
08 12.78 0.055 5.5 35.47 0.154 9.0 48.89 0.212 24 61.92 0.268 26
10 19.06 0.083 7.7 48.83 0.211 11.7 68.84 0.298 32 88.28 0.382 36
12 30.05 0.130 10.7 67.34 0.292 15.5 98.89 0.428 41 129.54 0.561 45
14 51.21 0.222 13.9 94.27 0.408 19.8 148.04 0.641 51 200.27 0.867 55
16 58.62 0.254 16.2 109.09 0.472 23.3 170.64 0.739 56 230.43 0.998 61
24x16 66.03 0.286 20.4 123.91 0.536 29.8 193.24 0.837 76 260.59 1.128 82
LAT EAT
MBH 921.7×
Cfm
--------------------------------------
+=
WTD EWT LWT
2MBH×
Gpm
------------------------
=–=
- Product Catalog 1
- Introduction 2
- Table of Contents 3
- UC210 BACnet Controller 8
- UC400 BACnet Controller 8
- Air-Fi Wireless System 9
- Wireless Zone Sensor Set 9
- Pneumatic Controller 10
- Binary Input Controller 10
- Features and Benefits 11
- Agency Certifications 12
- Model Number Descriptions 14
- Selection Procedure 17
- General Data 19
- 20 VAV-PRC011M-EN 20
- Performance Data 21
- 22 VAV-PRC011M-EN 22
- VAV-PRC011M-EN 23 23
- 24 VAV-PRC011M-EN 24
- VAV-PRC011M-EN 25 25
- 26 VAV-PRC011M-EN 26
- VAV-PRC011M-EN 27 27
- 28 VAV-PRC011M-EN 28
- VAV-PRC011M-EN 29 29
- 30 VAV-PRC011M-EN 30
- VAV-PRC011M-EN 31 31
- 32 VAV-PRC011M-EN 32
- VAV-PRC011M-EN 33 33
- 34 VAV-PRC011M-EN 34
- VAV-PRC011M-EN 35 35
- 36 VAV-PRC011M-EN 36
- VAV-PRC011M-EN 37 37
- 38 VAV-PRC011M-EN 38
- Electrical Data 39
- 40 VAV-PRC011M-EN 40
- VAV-PRC011M-EN 41 41
- 42 VAV-PRC011M-EN 42
- VAV-PRC011M-EN 43 43
- 44 VAV-PRC011M-EN 44
- VAV-PRC011M-EN 45 45
- 46 VAV-PRC011M-EN 46
- VAV-PRC011M-EN 47 47
- 48 VAV-PRC011M-EN 48
- VAV-PRC011M-EN 49 49
- 50 VAV-PRC011M-EN 50
- Dimensional Data 51
- 52 VAV-PRC011M-EN 52
- VAV-PRC011M-EN 53 53
- 54 VAV-PRC011M-EN 54
- VAV-PRC011M-EN 55 55
- LEFT HAND RIGHT HAND 56
- VAV-PRC011M-EN 59 59
- Mechanical Specifications 60
- Outlet Conection 61
- Hot Water Coils 61
- Electric Heat Coils 61
- Electric Heat Options 61
- Direct Digitals Controls 62
- Control Options 63
- Hot Water Valves 63
- 64 VAV-PRC011M-EN 64
- Dual-Duct VAV Terminal Units 66
- Octave Band 234567NC 67
- Outlet Connection 77
- Direct Digital Controls 77
- Reliable Operation 80
- Safe Operation 80
- System-Level Optimization 80
- Simplified Installation 80
- Controller Flexibility 81
- Control Logic 81
- Space Temperature Control 82
- General Operation-Cooling 82
- Ventilation Control 84
- Flow Tracking Control 85
- General Features and Benefits 88
- ONMARK open protocol 94
- DDC Controls 100
- Air-Fi™ Wireless System 101
- Dimensions 102
- Specifications 102
- DDC Zone Sensor 104
- Wall Sensor and Duct CO 105
- DDC Zone Sensor with LCD 106
- Zone Occupancy Sensor 107
- Two-Position Water Valve 109
- Proportional Water Valve 110
- VAV Piping Package 111
- Transformers 113
- Trane Spring Return Actuator 115
- VariTrane™ DDC Retrofit Kit 116
- Retrofit Kit Actuator 116
- Static Pressure Controller 117
- Pneumatic Controls 121
- Pneumatic Damper Actuator 123
- Reversing Relay 123
- Signal Limiter 125
- VAV-PRC011M-EN 133 133
- Controls Specifications 134
- DDC Retrofit Kit (VRTO) 136
- Retrofit Kit Options 136
- Other Options Available 137
- Application Considerations 138
- Terminal Heat 139
- Dual-Duct Systems 139
- VariTrane VAV Terminal Units 140
- VAV Terminal Unit Types 140
- Fan-Pressure Optimization 141
- Ventilation Reset 141
- Control Types 142
- Pneumatic Control Systems 143
- Room Thermostats 144
- Pneumatic Volume Regulators 144
- Flow Measurement and Control 146
- Accuracy 147
- Air Density Effects 147
- Reheat Options 148
- Electric Reheat 149
- Insulation 150
- Acoustics 150
- Insulation types 151
- Placement of units 151
- Unit Attenuation 151
- Certification and Testing 152
- Duct Design 153
- Best Practices 154
- Unit Conversions 155
- VariTrac™ catalog 157
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