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Table Of Contents

1 of 12

- Application

Mixing Control 361

A 361-1

03/09

Note:

This is only a concept drawing. The designer must determine whether this application will work in his system and must ensure compliance with

code requirements. Necessary auxiliary equipment, isolation relays (for loads greater than the speciﬁed tekmar internal relay ratings), and other safety

and limit devices must be added.

Mechanical

see Essay E 021

Outdoor

Sensor (S2) 070

Class 2

Transformer

120 V (ac)

24 V (ac)

Mix

Sensor

(S3) 082

Boiler

Sensor

(S1) 082

P3 P1

361

Electrical

P1 = Variable Speed Injection Pump

P2 = Boiler Pump

P3 = Mixing System Pump

S1 = Boiler Supply Sensor 082

S2 = Outdoor Sensor 070

S3 = Mix Supply Sensor 082

T1, ..., T3 = Thermostats

U1 = tekmar Timer 031 (optional)

V1 = Balancing or Globe Valve

Z1, ..., Z3 = Zone Valve Motor End Switches

Boiler

24 V (ac)

120 V (ac)

Class 2

Transformer

Zone Valve

Motor End

Switches

30% Enable

Return

10% Enable

Boiler Sensor

Supply

Installer

Advanced

361

5 9

Var

Do not apply power

Com

UnO

Boil

Indr

Pmp

Boiler

10A

Mixing

Demand

Power

Pmp

Sys

Com

Mix

Out

10A2.4A

= Required

= Optional

= Not Used

Summary of content (12 pages)

PAGE 1
- Application A 361-1 Mixing Control 361 03/09 Mechanical 361 Outdoor Sensor (S2) 070 Class 2 Transformer 24 V (ac) 120 V (ac) Z3 Z2 Z1 M M M T3 T2 see Essay E 021 T1 Mix Sensor (S3) 082 P3 P2 P1 Boiler Sensor (S1) 082 V1 Electrical 10A 2.4A 361 10A Do not apply power P1 = Variable Speed Injection Pump P2 = Boiler Pump P3 = Mixing System Pump S1 = Boiler Supply Sensor 082 S2 = Outdoor Sensor 070 S3 = Mix Supply Sensor 082 T1, ...
PAGE 2
A 361-1 03/09 System Operation The Mixing Control 361 provides full outdoor reset to three (or more) mixed zones. The output of the variable speed injection pump is modulated to mix the water temperature to the zones, and protect the boiler from flue gas condensation. The boiler operates at the required temperature in order to satisfy the load. Heat Source Details The heat source can be either a high mass or low mass non-condensing boiler.
PAGE 3
- Application A 361-2 Mixing Control 361 03/09 Mechanical 361 Outdoor Sensor (S2) 070 Class 2 Transformer 24 V (ac) 120 V (ac) R1 A2 Z3 Z2 Z1 M M T3 A1 M T2 see Essay E 021 T1 Mix Sensor (S3) 082 P4 P1 P3 DHW Tank Boiler Sensor (S1) 082 P2 V1 Electrical 10A 2.
PAGE 4
A 361-2 03/09 System Operation The Mixing Control 361 provides full outdoor reset to three (or more) mixed zones. The output of the variable speed injection pump is modulated to mix the water temperature to the zones, and protect the boiler from flue gas condensation. The boiler operates at the required temperature in order to satisfy the loads. The supply of heat to an indirect Domestic Hot Water (DHW) tank is controlled through an external relay.
PAGE 5
- Application A 361-3 Mixing Control 361 03/09 Mechanical 361 Outdoor Sensor (S2) 070 Class 2 Transformer 24 V (ac) 120 V (ac) R4 A2 R3 R2 T3 Z3 Z2 R1 T2 Z1 A1 see Essay E 021 T1 Mix Sensor (S3) 082 P3 P1 DHW Tank Boiler Sensor (S1) 082 P2 V1 Electrical 10A 2.4A 361 10A Do not apply power A1 = DHW Aquastat A2 = DHW High Limit Aquastat P1 = Variable Speed Injection Pump P2 = Boiler Pump P3 = DHW Pump R1, ...
PAGE 6
A 361-3 03/09 System Operation The Mixing Control 361 provides full outdoor reset to three (or more) mixed zones. The output of the variable speed injection pump is modulated to mix the water temperature to the zones, and protect the boiler from flue gas condensation. The boiler operates at the required temperature in order to satisfy the loads. The supply of heat to an indirect Domestic Hot Water (DHW) tank is controlled through an external relay.
PAGE 7
- Application A 361-4 Mixing Control 361 03/09 Mechanical 361 Mix Demand 120 V (ac) Heat Pump Unit Zone 3 Heat Pump Unit Zone 2 Heat Pump Unit Zone 1 see Essay E 021 Mix Sensor (S2) 082 P3 Boiler Sensor (S1) 082 P1 P2 V1 Electrical 10A 2.
PAGE 8
A 361-4 03/09 System Operation The Mixing Control 361 provides setpoint control to a heat pump loop. The output of the variable speed injection pump is modulated to provide a fixed water temperature to the loop, and protect the boiler from flue gas condensation. The boiler operates at the required temperature in order to satisfy the load. Heat Source Details The heat source can be either a high mass or low mass non-condensing boiler. Piping Details Heat pump units are piped into the mixed loop.
PAGE 9
R6 T6 Z5 9 of 12 L N R 7 8 1 2 7 8 1 2 7 8 1 2 Z4 24 V (ac) R4 4 3 6 5 4 3 6 5 4 3 6 5 R6 R5 R4 Z6 Z5 Z4 U2 Sw S4 S3 T3 T2 T1 S5 11 12 13 14 15 16 17 P3 361 Do not apply power UnO Com Boil Mix Com Out Indr 10A Boiler 2.
PAGE 10
A 361-5 03/09 System Operation The Mixing Control 361 and the Boiler Control 260 are combined to provide full outdoor reset to three (or more) mixed zones and partial outdoor reset to three (or more) boiler zones. The output of the variable speed injection pump is modulated to provide a mixed supply water temperature to the mixed zones, and protect the boiler from flue gas condensation. The boiler operates at the required temperature in order to satisfy all the loads.
PAGE 11
of 12 L N R Z6 Z5 U3 S7 S6 2.
PAGE 12
A 361-6 03/09 System Operation Two Mixing Control 361’s and the Boiler Control 261 are combined to provide full outdoor reset to two independent mixed temperature zones and partial outdoor reset to boiler zones. The output of the variable speed injection pump is modulated to provide a mixed supply water temperature to the mixed zones, and protect the boilers from flue gas condensation.