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ManualsBrandsTekmar ManualsThermostats & ControlsBoiler Control - tN4 Compatible - Outdoor Temp. Reset - Four Modulating Boiler - DHW - Setpoint - BAS

Modbus

/ BACnet

483

tekmarNet

S8S7S6

P3 P4 P5 P6

284

C.A. Damper

BAS

C.A. Proof

Application A 284-1 Mechanical

Description

Two single stage non-condensing boilers & two modulating condensing boilers are operated to provide a boiler target

temperature for space heating, indirect DHW and setpoint loads. The boiler target temperature for the space heating load

is determined from outdoor temperature reset.

Concept Drawing: This is only a concept drawing, not an engineered drawing. It is not intended to describe a complete system, nor any particular system. It is up to the

system designer to determine the necessary components for and configuration of the particular system being designed, including additional equipment, isolation relays

(for loads greater than the control’s specified output ratings), and any safety devices which in the judgement of the designer are appropriate, in order to properly size,

configure and design that system and to ensure compliance with building and safety code requirements.

Features:

The boiler plant is sequenced to obtain maximum efficiency based on the boiler types & target temperatures. For detailed

information about sequencing, rotation & staging, refer to the 284_D Installation & Operation Manual.

Dual primary pumps with a flow proof provide redundancy. Pumps can be sequenced with equal run-time rotation.

A flow sensor is used to prove flow for the primary pumps. The flow sensor is also used for energy monitoring.

System includes a combustion air (C.A.) damper. Proving of C.A. damper via external C.A. proof (motor end switch).

Boiler ∆T monitoring is available when using optional boiler outlet sensors (S6 to S9) & boiler inlet sensor (S5).

Remote monitoring from the Internet is available through the tN4 Gateway 483.

Communication with a Building Automation System (BAS) is available using BACnet

or Modbus

•

ENABLE (1) = AUTO

CONDENSE (1) = NO

Boil TYPE (1) = 1STG

ENABLE (2) = AUTO

CONDENSE (2) = NO

Boil TYPE (2) = 1STG

ENABLE (3) = AUTO

CONDENSE (3) = YES

Boil TYPE (3) = MOD

ENABLE (4) = AUTO

CONDENSE (4) = YES

Boil TYPE (1) = MOD

Essential Source (#) Settings:

S1 = Outdoor Sensor

S2 = Boiler Supply Sensor

S3 = Boiler Return Sensor

S4 = DHW Sensor

S5 = Boiler Inlet Sensor

S6-S9 = Boiler Outlet Sensors

F1 = Flow Sensor

P1, P2 = Primary Pumps

P3-P6 = Boiler Pumps

P7 = IDHW Pump

P8 = Setpoint Pump

Legend

DIP Settings:

External Flow Proof / Off

External C.A. Proof / Off

Off / Exercise

Setback / Off

Essential System Settings:

APP MODE = RSET

AUX RELAY = DMPR

PUMP 1 = AUTO

PUMP 2 = AUTO

IDHW MODE = ON

IDHW LOCATION = Boil

IDHW SENSOR = ON

IDHW PRIM PUMP = OFF

SETP MODE = ON

SETP PRIM PUMP = OFF

FLOW SENSOR = ON

FLOW PROOF = 1 to 100%