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Taco SR503 User Manual

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104 pages
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TACO ZONE CONTROLS WIRING GUIDE
Pages
Switching Relays – Single Zone Wiring 2 – 2
Switching Relays – Oil Boiler Wiring Safety Notice 2 3– 4
Switching Relays – N
ON EXP Connected Together with Priority 5 11
Switching Relays – EXP Connected Together with Priority 12 14
Switching Relays – Multiple Indirect Hot Water Heaters 15 16
Switching Relays – EXP Connected To Reset Controls (PC700, 702 & 705) 17 28
Zone Valve Controls – N
ON EXP Connected Together with Priority 29 34
Zone Valve Controls – EXP Connected Together with Priority 35 38
Zone Valve Controls – Connected To Reset Controls (PC700, 702 & 705) 39 46
Hydro Air Fan Controls (HAFC 101 & 201) 47 51
Specialty Thermostat and Zone Valve Wiring 52 56
Radiant Mixing Block 57 58
X-Pump Block 59 61
iSeries Mixing Valves 62 63
Low Water Cutoffs and Electric Water Feeders 64 79
Aquastat Wiring 80 86
Instruction Sheets 87 97
Standard Terms and Definitions 98
Cross Reference 99 100
Do it once.
Do it right.
© Taco Catalog No. 100-9.0 Effective Date: July 1, 2010
Supersedes Date: July 1, 2007

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Taco SR503 Specifications

General IconGeneral
Zones3
Power Source24 VAC
Switch TypeSPDT
Voltage120 VAC
Frequency60 Hz
Switching RelayYes
Input Voltage120 VAC
Output Voltage24 VAC
Housing MaterialPlastic
Transformer Rating40 VA
Operating Temperature0°C to 49°C

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