Tekmar 284 - User Manual

Boiler Control 284
D 284
05/16
Replaces: 08/14
Installation & Operation Manual
© 2016 284_D - 05/16
1 of 60
A Watts Water Technologies Company
Multi-Staging
A Flexible Solution for Commercial & Multi-Residential Heating Plants
The Boiler Control 284 is designed to operate up to four
boilers to accurately maintain a target water temperature.
The 284 operates both condensing & non-condensing boilers
that are either modulating, single stage or two stage to
provide a flexible, cost effective mixed boiler plant solution
with better system performance.
The target water temperature is based on outdoor temperature
reset or a fixed setpoint for space or process heating
applications. Additional loads supplied by the 284 include
domestic hot water & fixed setpoint heating. Boiler equal
run-time rotation, stand-by primary pump operation & pump
exercising all increase boiler plant reliability.
The 284 communicates with a Building Automation System
(BAS) using BACnet
®
IP or Modbus
®
for remote monitoring
& adjustment capability. tekmarNet
®
Thermostats or a tN4
Gateway 483 can be added to optimize system performance
& provide remote monitoring capability.
BACnet is a registered trademark of ASHRAE.
ASHRAE does not endorse, approve or test products
for compliance with ASHRAE standards. Compliance of
listed products to the requirements of ASHRAE Standard
135 is the responsibility of BACnet International (BI).
BTL is a registered trademark of BI.
Features
• Outdoor temperature reset
• Programmable schedules
• tekmarNet
®
compatible
• Control up to four boilers
• Condensing & non-condensing boiler groups
• Modulating, single stage or two stage
• Boiler isolation valves
• BACnet
®
IP or Modbus
®
communication
• Primary pump sequencing
• DHW priority
• Setpoint operation
• Combustion air damper control
• Energy, flow & pressure monitoring
Benefits
• Reduce energy costs
• Prolong equipment life
• Provide boiler redundancy
• Provide primary pump redundancy
• Remote monitoring & adjustment options
• Combine mid & high efficiency boilers to lower
component cost

Summary

Sequence of Operation

Boiler (Source (#) Menu) Setup & Operation

Configures individual boiler settings for optimal plant flexibility.

System Setup & Operation

Application Mode

Selects the primary operating mode for the heating system.

Boiler Minimum

Sets the lowest allowable target temperature for the boiler.

Outdoor Temperature Reset Operation

Characterized Heating Curve

Determines target water temperature based on outdoor air temperature.

Setpoint Operation

Setpoint Mode

Enables or disables setpoint heating operation for various loads.

Indirect Domestic Hot Water (IDHW) Operation

DHW Call

Describes methods to request indirect domestic hot water.

Building Automation System (BAS)

BAS Type

Selects between Modbus® and BACnet® IP communication protocols.

Pump Operation

Primary Pump Operation

Explains primary pump sequencing, stand-by operation, and logging.

Flow Proof Call

Proves flow after pump activation to ensure proper operation.

Control Wiring

Wiring the Input Power

Details how to connect the 115V AC input power to the control.

Wiring the Boiler Pumps; Valves

Explains wiring for boiler pumps and isolation valves.

Sensor Installation & Wiring

Mounting the Outdoor Sensor

Guides on mounting the outdoor sensor for accurate temperature readings.

Wiring the Outdoor Sensor (tekmar 070)

Wiring Boiler Outlet Sensors (tekmar 082)

Explains how to wire boiler outlet sensors for temperature monitoring.

EMS, Modbus & BACnet Connections

EMS Connection

Describes how to connect an Energy Management System to the control.

Testing the Control Wiring

User Test (HAND)

Explains how to use the HAND mode for manual operation and testing.

Control Settings

Access Level

Manages access levels for different users to menus and settings.

DIP Switch Settings

Configures key features like flow proof and schedule operation via DIP switches.

User Interface

Display

Describes the different fields and components of the control's display.

Setup Menu (1 of 6)

APP MODE

Selects the main operating mode: RSET, SETP, DDHW, EMS, or BAS.

BOILER MINIMUM

Defines the minimum allowed boiler target temperature for non-condensing groups.

Source # Menu (1 of 2)

BOILER ENABLE

Selects whether a specific boiler is operational or disabled.

BOILER TYPE

Selects boiler operation type: modulating, single-stage, two-stage, or EMS.

Monitor # Menu (1 of 1)

BURNER RUN TIME

Records the total running time of the boiler since the last clear.

Monitor Menu (1 of 2)

PRIMARY PUMP 1 RUN TIME

Records the total running time of primary pump 1 since last cleared.

Troubleshooting

Error Messages (1 of 3)

Lists common error messages and their potential causes and solutions.

Error Messages (2 of 3)

Lists additional error messages and troubleshooting tips.

Error Messages (3 of 3)

Lists remaining error messages and troubleshooting guidance.

Technical Data

Limited Warranty & Product Return Procedure

Outlines the terms and conditions of the product warranty and return process.

Tekmar 284 Specifications