LAARS Heating Systems
Table of Contents
i
SECTION 1 General Information
1.A Introduction ....................................................... 1
1.B Warranty ........................................................... 1
1.C
Model Identification
........................................... 1
1.D
Safety Notes ..................................................... 2
1.E
Unit Overviews ................................................. 4
1.F Dimensions ....................................................... 7
1.G
Unpacking and the Installation Kit .................... 8
SECTION 2 Locating the Unit
2.A
Locating the unit ............................................... 9
2.B
Correct Vent Distance from Outside Wall
or Roof Termination .......................................... 9
SECTION 3 Venting and Combustion Air
3.A
General Venting .............................................. 11
3.B
Combustion Air ............................................... 12
3.C
Combustion Air From Room ........................... 12
3.C.1 Ducted Combustion Air ................................... 13
3.D Venting ............................................................ 13
3.D.1 Common Venting ............................................ 14
3.D.2 Venting Requirements Unique to Canada ...... 14
3.E
Locating the Vent & Comb Air Terminals ........ 15
3.E.1 Side Wall Vent Terminal .................................. 15
3.E.2 Side Wall Combustion Air Terminal ................. 17
3.E.3 Vertical Vent Terminal ..................................... 17
3.E.4 Vertical Combustion Air Terminal .................... 17
3.E.5 Installations in the Commonwealth
of Massachusetts ............................................ 17
3.F
Common Vent Test ......................................... 18
3.G
Outdoor Installation ........................................ 18
SECTION 4 Gas supply and Piping
4.A
Gas Supply and Piping ................................... 20
SECTION 5 Water Flow Requirements
5.A
Boiler Flow and Head Requirements .............. 22
5.B
Water Heater Flow and Head Requirements .. 23
SECTION 6 Water Connection Boilers
6.A
System Piping: ................................................
Hot Supply Connections ................................. 24
6.B
Cold Water Make-Up ...................................... 24
6.C
Freeze Protection ........................................... 24
6.D
Condensate Drain Trap .................................. 25
6.E
Suggested Piping Schematics ........................ 25
SECTION 7 Water Connections
7.A
Water Quality .................................................. 30
7.B
Suggested Piping Schematics ........................ 30
7.C
Piping Requirements ...................................... 30
7.E
Water Flow...................................................... 32
7.D
Condensate Drain Trap .................................. 32
SECTION 8 Electrical Connections
8.A
Installation Warnings ...................................... 33
8.B
Main Power Connections ................................ 33
8.C
Pump Connections and Operation ................. 34
8.D
Field Wiring ..................................................... 35
8.E
Field Connections for Single Unit Installs ....... 36
8.F
Field Connections for Lead / Lag Installs ...... 36
8.G
Control Panel Layout ...................................... 37
8.H
Building Automation System Connections ..... 38
8.I
Lead Lag Connections .................................... 39
8.J
Wiring Diagrams ............................................. 40
8.K
High Voltage Wiring Diagrams ........................ 44
8.L
Ladder Diagrams ............................................ 51
SECTION 9 Navigating the Touchscreen
9.A
The Touch Screen .......................................... 58
9.B
Using the Touch Screen ................................. 58
9.C
Screen Menu Icons ......................................... 59
9.D
Verification Process for
Safety Related Parameters ............................ 60
9.E
Checking Individual Parameters ..................... 61
9.F
Configuring Parameters
.................................. 62
9.G
Setting the Date and Time .............................. 63
9.H
Configuration Menus
...................................... 64
9.H.1 System Identification & Access
....................... 64
9.H.2 CH - Central Heat Configuration
..................... 64
9.H.3 Outdoor Reset Configuration
.......................... 64
9.H.4 DHW - Domestic Hot Water Configuration
..... 65
9.H.5 Warm Weather Shutdown Configuration
........ 65
9.H.6 Demand Priority Configuration
....................... 65
9.H.7 Modulation Configuration
................................ 65
9.H.8 Pump Configuration
........................................ 66
9.H.9 8.5.8 Pump Configuration
............................... 66
9.H.10 Statistics Configuration
................................... 66
9.H.11 High Limits ...................................................... 66
9.H.12 Stack Limits .................................................... 66
9.H.13 Delta T Limits-................................................. 66
9.H.14 Frost Protection .............................................. 67
