Viconics VT7225 series Installation Manual Download Page 10

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10 | 028-0485-00

November 2017

24V

SSR

Up to 10x 24Vac SSR in parallel

(or add C24 adapter board to regular 3-32Vdc SSR)

Room temperature control with 24 Vac SSR

Wiring details

24V~

COM

AUX

AO 2

AO 1

BI 1

UI3

24V~

HOT

COM

24V~

COM

AUX

AO 2

AO 1

BI 1

UI3

24V~

HOT

COM

Up to 10x

24Vac SSR

(see wiring detail)

Summary of Contents for VT7225 series

Page 1: ...to 10 Vdc output one 8 Vdc and one 24 Vac proportioning pulsed output The analog 0 to 10 Vdc modulating output can control the room or supply temperature by modulating directly a 0 to 10 Vdc SCR power controller The Vdc and Vac pulsed outputs can control the room or supply temperature by modulating directly 4 32 Vdc triggered solid state relays SSR s using a time proportioning control algorithm on...

Page 2: ...2 028 0485 00 November 2017 CONTENTS Installation 3 Location 3 Installation 3 BI 1 5 UI 3 5 Terminal Identification and Function 5 Output Types 6 Wiring 7 Remote sensor accessories 11 ...

Page 3: ...open Room Controller PCB to left by pressing PCB locking tabs fig 2 2 Pull out cables 6 out from the wall Ensure wall surface is flat and clean 3 Insert cable in central hole of base 4 Align base and mark location of two mounting holes on wall Install proper side of base up 5 Install anchors in wall 6 Insert screws in mounting holes on each side of base fig 2 7 Gently swing back circuit board on b...

Page 4: ...ating controls only and are not safety devices These instruments have undergone rigorous tests and verification prior to shipping to ensure proper and reliable operation in the field Whenever a control failure could lead to personal injury and or loss of property it becomes the responsibility of the user installer electrical system designer to incorporate safety devices such as relays flow switch ...

Page 5: ... Occupied Contact closed Unoccupied UI 3 Supply air sensor Used for supply air temperature control TERMINAL IDENTIFICATION AND FUNCTION Pin Number Pin Identification Description 4 24 V HOT Power 24 Vac 5 24 V COM Common 6 Do not use 7 AUX 24 Vac pulsed output 9 AO 2 0 to 10 Vdc analog output 10 AO 1 8 Vdc pulsed output 12 BI 1 Night setback input 13 RS Remote sensor 14 S COM Sensor common 16 UI 3 ...

Page 6: ...485 00 November 2017 Output Types Type of Output Controlled Device Modulating analog 0 to 10 Vdc output SCR s power controls Vdc pulsed output 4 32 Vdc triggered SSR s Vac pulsed output 24 Vac triggered SSR s ...

Page 7: ...ill force setpoint to Unocc HT adjustable inside setup parameters By adjusting to a low setpoint ex 0 F is a way to disable heating By adjusting to 180 F is a way to force maximum heating If parameter MenuScro On will display Unoccup when contact closed and Occupied when contact open 24V 0 to 10 Vdc 24V COM AUX AO 2 AO 1 BI 1 S COM UI3 24V HOT RS Return temperature control with 0 to 10Vdc SCR ...

Page 8: ...2 AO 1 BI 1 S COM UI3 24V HOT RS 24V COM AUX AO 2 AO 1 BI 1 S COM UI3 24V HOT RS Wiring detail for 4x 4 32 Vdc SSR 24V SSR Up to 4x 4 32Vdc SSR see wiring detail Room temperature control with 4 32Vdc SSR 24V COM AUX AO 2 AO 1 BI 1 S COM UI3 24V HOT RS 24V COM AUX AO 2 AO 1 BI 1 S COM UI3 24V HOT RS Wiring detail for 4x 4 32 Vdc SSR ...

Page 9: ...ber 2017 24V SSR Room remote temperature control with 4 32Vdc SSR 24V COM AUX AO 2 AO 1 BI 1 S COM UI3 24V HOT RS 1x 2x or 3x remote sensors for averaging room temperature reading see S3010W1000 manual for proper settings ...

Page 10: ... SSR in parallel or add C24 adapter board to regular 3 32Vdc SSR Room temperature control with 24 Vac SSR Wiring details 24V COM AUX AO 2 AO 1 BI 1 UI3 24V HOT RS S COM 24V COM AUX AO 2 AO 1 BI 1 UI3 24V HOT RS S COM Up to 10x 24Vac SSR see wiring detail ...

Page 11: ... Room sensor Remote room sensing 3 thermistors with 2 dip switches are provided with each sensor for various averaging combinations S2000D1000 Duct sensor with junction box Remote return air temperature sensing with the sensor mounted on the return air duct Outside air temperature sensing with the sensor installed in the fresh air plenum Supply air temperature sensor S1010D1000 Duct Mounted Change...

Page 12: ... 6109 5 23 41 5956 15 59 15 6286 35 95 6 5499 55 131 3 0016 Specifications Operating Conditions 0 C to 50 C 32 F to 122 F 0 to 95 R H non condensing Sensor Local on board NTC Thermistor Resolution 0 1 C 0 2 F Control Accuracy 0 2 C 0 4 F calibrated Control Ranges 17 C to 82 C 0 F to 180 F Proportional band for room temperature control 1 8 C 3 2 F Proportional band for supply temperature control 28...

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Viconics VT7225 series, Installation Manual

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