Laars M4-Ext - Installation Manual User Manual

HT# 059104-00 BLaars Condensing and Non-Condensing Boiler ControlsDocument 4217BOutput panel to Modulate and Sequence

10 • Only use a Standard Brass Tube sensor (CA002400 or equivalent).• The sensor wires can be e

Installation Manual 11• All wiring must enter the enclosure through the bottom knockouts.• Class 1 voltage wiring must utilize a differ

12 • When the Shutdown input is enabled by closing the dry contact, or when the Tstat input is disabled by opening the dry-contact, all active modul

Installation Manual 13• When wiring condensing and non-condensing boilers make sure that condensing boilers utilize the rst

14 • The M4-CNC is equipped with a 6-pin phone socket (RS485) to connect to extension panels and XSIG (4-20mA r

Installation Manual 15To be able to change the  settings the Program/Run Switch must be set to Program. The swi

16 To be able to change the M4-CNC settings the Program/Run Switch must be set to Program. The switch is

Installation Manual 17Adjustablefrom5Fº/3Cºto20Fº/11Cº Default:5Fº/3CºButton: MENU/<System Startup>/.../Swi

18 4-20mA,0-5V,0-10V,1-5V,or2-10VOutputs Default:4-20mA• If either of the Condensing or Non-

Installation Manual 19On/Off,2-Stage,3-Stage,4-StageOutputs Default:On/Off• The M4-CNC ca

2 . . . . . . . . . . . . . . . .3 . . . . . . . . . . . . . . . . .4

20 • When Shutdown or Tstat is selected, the Day/Night Schedules will be available in the operating menu. See "Shutdown/Tstat/Setback Mode&quo

Installation Manual 21To be able to change the  settings the Program/Run Switch must be set to Program. The s

22 To be able to change the M4-CNC settings, the Program/Run Switch must be set to Program. The switch

Installation Manual 23• The Offset setting does not change the ratio selection. For instance, with 1.00 (OD):1.00 (SYS) Reset Ratio, the Syste

24 Button: MENU/<System Settings>Settings 1 and Settings 2 menus provide access to adjusting and ne-tuning the syst

Installation Manual 25• A common use for the System Run-On is to control a system pump in a heating system. The extra time helps transfer the

26 Adjustablefrom-10to+10 Default:0Button: MENU/<System Settings>/<More Settings>/<Modula

Installation Manual 27Adjustablefrom1to10minutes Default:2minutesButton: MENU/<System S

28 DAY/NIGHT SCHEDULESet Time **:** Day Schedule 6:00a Night Schedule 8:00pBACK ▲ ▼ SAVE-- DAY SCHEDULE --6:00 AmBACK ▲ ▼

Installation Manual 29Adjustablefrom-5F°/-3C°to+5F°/+3C° Default:0°FButton: MENU/<Maintenance>/System Tri

Installation Manual 3In response to new advancement in condensing boiler design and size, many applications utilize multiple conde

30 OD= 55oF SYS=143oFPrepurge Delay 15 <<A>> B 67% 20%STAGE ◄ ► MENUButton FunctionsButtons}Boilers and Their StatusMessagesOutdoor and

Installation Manual 31• Outdoor Cutoff The outdoor temperature is above the Outdoor Cutoff setting. No boilers will be active for heating.•

32 Manual The Manual Mode should only be used when testing a boiler. Manual overrides the Prove input. For modulating boilers, the exact percent o

Installation Manual 33 When OPEN, Check the sensor is connected and the wires are

34 The  operates 2 modulating boilers and 2 On/Off Boilers. The boilers ar

Installation Manual 35

36 HT# 059104-00 B

Installation Manual 37Boost Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

38 Lag Boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installation Manual 39Staging Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4 HT# 059104-00 BFOR ALL CIRCUITS120VAC, 6A RESISTIVEOUTPUT RATINGS: 1A PILOT DUTY, 15A TOTAL115VAC 60Hz , 12VA MAXI

VoltageInput: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installation Manual 5HT# 059104-00 BENCLOSEDENERGYMANAGEMENTEQUIPMENT99RAFHJPowerCAUTION:

6 The M4-CNC can operate both modulating and staging boilers. Just spe

Installation Manual 7The M4-CNC has multiple operating modes that satisfy most hydronic systems. It changes the System Set

8 If you need the M4-CNC to do additional tasks that either are not listed or do not know how to congure them, co

Installation Manual 9Each of the M4-CNC or M4-Extension consists of three primary enclosure components. • TheEnclosureDisplayMo