Burnham RTC (Return Temperature Control) Manuale di Installazione Scaricare il pdf (Pagina 27)

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A1. 3-way RTC in Primary/Secondary - Heating Only/No DHW; with/without Outdoor Reset (Electrical)

NOTES:

1) Refer to the I&O to determine correct valve orientation and actuator wiring.

2) 120 VAC supplying the RTC should be separate from the burner/boiler circuit.

3) Heat demand can be any electrical signal consisting of 24 - 240 VAC.

4) Use isolation relays for circulators greater than 1/3 HP. Use motor starters for 3 phase circulators.

5) The Outdoor Sensor (S3) and the Mix Supply Sensor (S2) are required if the Outdoor Reset feature is selected.

6) System Pump (P2) to be operated by zone relay or other installer supplied device.

This diagram is for reference only. The installer or designer is responsible for the proper selection and design of the

system.

24 V (ac)

120 V (ac)

Class II

Transformer

S2 S3

Do not apply power

10A

Boil

Ret

Com Mix OutCom

12 13 14 15 16

Boil

Pmp

Burnham RTC

3 5

Power

10A

24 Volt Output

7 8

Boiler

Enable

1 2

Heat

Demand

Boiler

CW - Closed to System

CW - Open to System

NL1 L1

Z1...Z3

24 Volt Output

NL1 L1

C1 = Mixing Valve Actuating Motor

P1 = Boiler Circulator

S1 = Boiler Return Sensor

S2 = Mix Supply Sensor 071

S3 = Outdoor Sensor 070

Z1...Z3 = Zone Valves, Zone Relays,

Thermostats or BMS Signal

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 ... 59 60

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Burnham RTC (Return Temperature Control) Manuale di Installazione Pagina 27

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