LAARS Heating Systems
Section 9 – Setup and Configuration
............................... 44
9.1
Review of Lead/Lag Control System ............. 44
9.1.1
About Lead/Lag Operation ............................. 44
9.1.2
Lead/Lag Modulation Cycle ........................... 45
9.1.3
Lead/Lag Domestic Hot Water ....................... 46
9.2
Connection Terminals ..................................... 46
9.3
NeoTherm System Configuration
................... 48
9.4
Installation Jobs .............................................. 56
A
Note for Systems Using Common
Venting ........................................................... 56
B
Naming the Controllers .................................. 56
C
Make One Control the Lead/Lag
Master ............................................................. 57
D
Disable the Lead/Lag Master Function
on the Lead/Lag Slaves .................................. 58
E
Set up the Modbus Control Addressing .......... 60
F
Set the Flap Valve IDs .................................... 61
G
Disconnecting Unused Operator
Interfaces ........................................................ 65
H
Connect the Modbus Wiring........................... 66
I
Set the Parameters Used by the
Lead/Lag System ............................................ 66
About the “Time of Day” Function ................ 71
J
Install the System Sensor and Adjust
the Setpoint ..................................................... 72
K
Set the Lead/Lag Outdoor Reset and
Warm Weather Shutdown ............................... 72
About “Outdoor Reset” .................................. 73
L
Building Automation or Multiple Boiler
Control Thermostat Demand ......................... 74
M
Building Automation or Multiple Boiler
4-20mA Setpoint Control .............................. 74
N
Building Automation or Multiple Boiler
4-20mA Modulation Control .......................... 75
O
Combustion Setup Procedure ......................... 75
P
Setting the Date and Time on the
System Display ............................................... 79
9.5
Setup for Domestic Hot Water on a
Lead/Lag System ............................................ 81
Setup Type 1 ................................................................ 81
Setup Type 2 ................................................................ 82
Setup Type 3 ................................................................ 83
9.6
Installer Parameters ........................................ 85
Section 10 - Operating Instructions ................................. 92
10.1
Filling the Boiler System ................................ 92
10.2
Initial Operation ............................................. 93
10.2.1 Initial Burner Operation ................................. 93
10.2.2 Combustion Setup Procedure ......................... 93
10.3
Shutting Down the NeoTherm Unit ............... 93
10.4
Restarting the NeoTherm Unit ....................... 93
Section 11 – Maintenance ................................................ 94
11.1
System Maintenance....................................... 94
11.2
Maintenance Notes ......................................... 94
11.2.1 Burner ............................................................. 94
11.2.2 Modulating Gas Valve/ Venturi ...................... 94
11.2.3 Controllers ...................................................... 95
11.2.4 Ignitor Assembly ............................................ 95
11.2.5 Flame Sensor .................................................. 95
11.2.6 Transformer with Integral
Circuit Breaker ............................................... 95
11.2.7 Blower ............................................................ 96
11.2.8 Heat Exchanger Coils ..................................... 96
11.2.9 Gas Pressure Switches (optional) ................... 96
11.2.10 Natural/Propane Gas Conversion ................. 97
Section 12 – Troubleshooting .......................................... 98
12.1
Potential Setup and Synchronization
Problems ......................................................... 98
12.1.1 Controller Synchronization ............................ 98
12.1.2 Flap Valve Status Checks ............................... 99
12.2
About Lockouts, Holds, and Alerts ................ 99
12.2.1 Responding to a Lockout, Hold,
or Alert ............................................................ 99
12.2.2 Viewing the Lockout and Alert
Histories ....................................................... 100
12.3
Troubleshooting Table .................................. 102
12.4
Diagnostic Tests and Input/Output
Indicators ...................................................... 117
12.5
Lead/Lag Slave Diagnostics ......................... 118
12.6 Statistics ....................................................... 118
12.7 Analysis ........................................................ 119
12.8
Operating Sequence ...................................... 119
Section 13 – Replacement Parts ..................................... 122
13.1
General Information ..................................... 122
13.2
Parts List ....................................................... 122
13.3
Parts Illustrations .......................................... 126
ii
Summary of Contents for NTV1000
Page 2: ......
Page 35: ...NeoTherm Boilers and Water Heaters Page 31 Fig 20 Ladder Diagram...
Page 36: ...LAARS Heating Systems Page 32 Fig 21 Wiring Diagram...
Page 37: ...NeoTherm Boilers and Water Heaters Page 33...
Page 51: ...NeoTherm Boilers and Water Heaters Page 47 Fig 52 Connection Terminals...
Page 130: ...LAARS Heating Systems Page 126 Fig 140 Machine Frame and Rear Panel 13 3 PARTS ILLUSTRATIONS...
Page 131: ...NeoTherm Boilers and Water Heaters Page 127 Fig 141 Front Panel and Covers...
Page 132: ...LAARS Heating Systems Page 128 Fig 142 Burners and Combustion Chambers...
Page 134: ...LAARS Heating Systems Page 130 Fig 145 Electronic Components...
Page 135: ...NeoTherm Boilers and Water Heaters Page 131 Fig 146 Condensate Trap Fig 147 Control Bezel...
Page 136: ...LAARS Heating Systems Page 132 Fig 148 Flow Switch...
Page 137: ...NeoTherm Boilers and Water Heaters Page 133 This page intentionally left blank...