LAARS M4-Ext - Installation Manual User Manual

Page 2

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Contents

M4-CNC Overview

. . . . . . . . . . . . . . . .3

M4-CNC Layout

. . . . . . . . . . . . . . . . . 4

M4-Extension Layout

. . . . . . . . . . . . . .5

Features . . . . . . . . . . . . . . . . . . . . . 6

Outdoor Reset Concept . . . . . . . . . . . . .7

Reset Ratio/Outdoor Reset

. . . . . . . . . . . .7

Make Sure You Have the Right Control . . . . .8

initial Setup

. . . . . . . . . . . . . . . . . . . 8

Selecting the System Features. . . . . . . . . .8

installation

. . . . . . . . . . . . . . . . . . . . 9

Mounting the Enclosure . . . . . . . . . . . . .9

Install the Sensors . . . . . . . . . . . . . . . 10

System Sensor (HSS) Installation

. . . . . . . . 10

Outdoor Sensor Installation

. . . . . . . . . . . 10

Wiring . . . . . . . . . . . . . . . . . . . . . 11

Wiring the Power

. . . . . . . . . . . . . . . . 11

Wiring the Sensors

. . . . . . . . . . . . . . . 11

Wiring the Shutdown, Tstat, or Setback

. . . . . 11

Wiring the Prove

. . . . . . . . . . . . . . . . 12

Wiring the Domestic Hot Water (DHW) Call

. . . 12

Wiring the System Output

. . . . . . . . . . . 12

Wiring the Boilers

. . . . . . . . . . . . . . . 13

Wiring Multi-Stage Boiler Outputs

. . . . . . . . 13

Wiring to Modulating Output

. . . . . . . . . . 13

Connecting to the M4-Extension Panels

. . . . . 14

Connecting to the XSIG

. . . . . . . . . . . . 14

Startup Menu Sequence

. . . . . . . . . . . 15

Startup Settings . . . . . . . . . . . . . . . . 16

Program Change Switch Setting

. . . . . . . . 16

Startup Sequence

. . . . . . . . . . . . . . . 16

Sensor Type

. . . . . . . . . . . . . . . . . . 16

Switch Set Point

. . . . . . . . . . . . . . . . 16

Switch Differential

. . . . . . . . . . . . . . . 17

Switch Delay

. . . . . . . . . . . . . . . . . . 17

Heavy Load Sequence 2nd Group

. . . . . . . 17

Condensing Boiler Type

. . . . . . . . . . . . 17

Condensing and Non-Condensing Boiler Number

17

Modulating Boiler Settings . . . . . . . . . . . 18

Modulating Output Type

. . . . . . . . . . . . 18

Modulating Mode

. . . . . . . . . . . . . . . . 18

Sequencing Boiler Settings . . . . . . . . . . 19

Sequencing Output Type

. . . . . . . . . . . . 19

Staging Mode

. . . . . . . . . . . . . . . . . 19

Prove/Domestic Hot Water (DHW) Priority

. . . . 19

Domestic Hot Water Set Point

. . . . . . . . . 19

Shutdown/Tstat/Setback Mode

. . . . . . . . . 19

Boost Mode

. . . . . . . . . . . . . . . . . . 20

Sensor Fault

. . . . . . . . . . . . . . . . . . 20

Setting the Control to Factory Defaults. . . . . 20

Operating Menu Sequence

. . . . . . . . . 21

Operating Settings . . . . . . . . . . . . . . . 22

Program Change Switch Setting

. . . . . . . . 22

Season

. . . . . . . . . . . . . . . . . . . . 22

Reset Ratio

. . . . . . . . . . . . . . . . . . 22

Offset

. . . . . . . . . . . . . . . . . . . . . 22

Outdoor Cutoff Temperature

. . . . . . . . . . 23

Minimum Water Temp

. . . . . . . . . . . . . 23

Maximum Water Temp

. . . . . . . . . . . . . 23

System Settings . . . . . . . . . . . . . . . . 24

Setback

. . . . . . . . . . . . . . . . . . . . 24

Purge Delay

. . . . . . . . . . . . . . . . . . 24

System Run-On

. . . . . . . . . . . . . . . . 24

Lead Boiler Rotation

. . . . . . . . . . . . . . 25

Standby Time

. . . . . . . . . . . . . . . . . 25

Last Stage Hold

. . . . . . . . . . . . . . . . 25

Lead Stages

. . . . . . . . . . . . . . . . . . 25

Operating Modulating Boiler Settings . . . . . 26

Gain

. . . . . . . . . . . . . . . . . . . . . . 26

Lag Delay

. . . . . . . . . . . . . . . . . . . 26

Soft-Off Delay

. . . . . . . . . . . . . . . . . 26

Operating Staging Boiler Settings . . . . . . . 27

Reaction Time

. . . . . . . . . . . . . . . . . 27

Minimum Runtime

. . . . . . . . . . . . . . . 27

Day / Night Schedule. . . . . . . . . . . . . . 28

Set Time

. . . . . . . . . . . . . . . . . . . . 28

History . . . . . . . . . . . . . . . . . . . . . 28

Maintenance . . . . . . . . . . . . . . . . . . 28

System & Outdoor Sensor Trim

. . . . . . . . . 29

Output Modulation Trim

. . . . . . . . . . . . . 29

Configuration

. . . . . . . . . . . . . . . . . 29

Display

. . . . . . . . . . . . . . . . . . . . 30

Boiler Status

. . . . . . . . . . . . . . . . . . 30

Display Sequencing Boiler Status

. . . . . . . . 30

Display Messages

. . . . . . . . . . . . . . . 30

Boiler Stage Settings. . . . . . . . . . . . . . 31

Mode

. . . . . . . . . . . . . . . . . . . . . 31

Ignition %

. . . . . . . . . . . . . . . . . . . 32

Modulation Start %

. . . . . . . . . . . . . . . 32

Copy Settings - Boiler A Only

. . . . . . . . . . 32

Troubleshooting

. . . . . . . . . . . . . . . . 33

direct Heating Piping diagram

. . . . . . . 34

direct Heating Wiring diagram

. . . . . . . 35

index

. . . . . . . . . . . . . . . . . . . . . . 37

Specifications

. . . . . . . . . . . . . . . . . 40

LAARS Heating Systems

HT# 059104-00 B

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