Laars OMNITHERM ONH1250 Manuals

Manuals and User Guides for Laars OMNITHERM ONH1250. We have 1 Laars OMNITHERM ONH1250 manual available for free PDF download: Assembly, Installation And Operation Instructions

Laars OMNITHERM ONH1250 Assembly, Installation And Operation Instructions (136 pages)

Boiler Water Heater

Brand: Laars | Category: Boiler | Size: 11 MB

Table of Contents
2
SECTION 1 General Information 1.A Introduction
5
B Warranty
5
C Model Identification
5
D Safety Notes
6
E Unit Dimensions and Components
8
Model 1250 / 1500
8
Model 1750
10
Models 2000 / 2500
12
F Unpacking
14
G Locating the Unit
14
H Clearances
14
SECTION 2 Venting and Combustion Air
15
A General Venting Info, Cat I and Cat III
15
Vent and Air Pipe Sizing
15
Combustion Air
15
A.2.A Combustion Air from Room
15
A.2.B Ducted Combustion Air
16
B Category I Venting
17
Category I Vent
17
Common Venting Systems
17
Common Vent Test - Boilers
18
C Category III Venting
19
Category III Vent
19
Exhaust Vent Terminal
19
Vent and Air Pipe Material
19
Vent Adapters
19
Locating Vent & Comb Air Terminals
20
Side Wall Vent Terminal Category Lll Only
20
Side-Wall Combustion Air Terminal Category L and Lll
20
Vertical Vent Terminal Category L and Lll
20
Vertical Combustion Air Terminal Category L and Lll
20
E Outdoor Installation
22
F Installations in the Commonwealth of Massachusetts
23
SECTION 3 Gas Supply and Piping
23
A Gas Supply and Piping
23
B Gas Pipe Sizing
24
SECTION 4 Water Flow and Headloss Data
24
A General Water Flow Information
24
B Boiler Water Flow & Headloss Data
25
C Water Heater Flow and Headloss Data
25
Recovery Data
26
SECTION 5 Piping
26
Boiler Water Piping
26
Boiler Water Connections
26
Cold Water Make-Up
26
Freeze Protection
27
Suggested Boiler Piping Schematics
28
Water Heaters
32
Water Quality
32
Heater Water Connections
32
Cold Water Make-Up
32
Freeze Protection
32
Suggested Piping Schematics
32
SECTION 6 Condensate Drain Trap
34
SECTION 7 Electrical Connections
34
Installation Warnings
34
Main Power Connections
35
Main Power Data
35
Control Panel Layout
36
Field Connections
36
Power
37
Boiler Pump
37
Dry Contacts
37
Alarm Bell
37
Sensors
38
Heat Demands
38
Spare Inputs
38
Inputs, BMS
38
Outputs, Pump
38
Dry Contacts (Run & Alarm)
38
RS 485 for Cascade (Lead Lag)
39
Rs 485 Bms
39
Modbus/Bacnet Memory Map
40
Wiring Diagrams - High Voltage
44
Logic Diagrams
49
SECTION 8 Control Operation
54
The Home Screen
54
Home Screen Active Icons
54
Keypad Operations
55
Login to Lock / Unlock the Disp Screen
56
Quick Start
57
Central Heat)
57
CH1 (Central Heat, One) 1
58
CH2 (Central Heat, Two) 2
58
DHW (Domestic Hot Water)
58
Outdoor Reset
59
Warm Weather Shut down
59
Anti-Short Cycle
60
Time & Date
60
Configuration
61
D.1.A CH1 (Central Heat, One)
62
Central Heat)
62
D.1.A.1 PID Low
63
D.1.A.2 PID High
63
D.1.B CH2 (Central Heat, Two)
63
DHW (Domestic Hot Water)
64
Outdoor Reset
65
Cascade
66
D.4.A Cascade Parameters
67
D.4.A.1 Base / Drop Load
68
D.4.B Rotation
68
D.4.B.1 Rotation Setup
69
D.4.C Redundancy
69
Pumps
70
D.6.A Vari-Prime
71
Manual Firing Rate
72
Temp Limits
72
D.8.A Delta T Parameters
73
D.8.B Flue Limitation Parameters
73
D.8.C Outlet Limitation Parameters
73
External
74
D.9.A External - Remote Set Point
75
Time & Date
75
Miscellaneous Features
76
D.11.A Demands Priorities
77
D.11.B Anti-Short Cycle
77
D.11.C Warm Weather
78
D.11.D COM Port, BMS
79
D.11.E Temperature Conversion
80
D.11.F Anti-Frost
80
Login
81
Service Screens
82
Burner
82
Digital I/O Inputs
83
E.2.A Digital Outputs
83
Analog I/O
84
Screen Settings Timeout
85
History
85
Restart Touchscreen & Recalibrate
86
Factory Reset
86
HMI Model OEM Only
86
BIC Model OEM Only
86
Both Models. OEM Only
86
About the Firmware of the Touchscreen
86
Dev Fan
86
Fan Settings
86
F Messages and USB
87
Messages
87
USB Functionality
87
G Active Demands
88
SECTION 9 Gas Valve Touchscreen, Menus and Descriptions
89
About the Gas Valve
89
Menu Structure (Example)
90
Gas Valve Display Navigation and Menus
90
Fuel Air Ratio & Ignition, Menus
93
Oem
93
Ignition Menu
94
Base Curve Menu
95
Correction Curve Menu
95
Summary Menu
96
Load & Save Menu
96
Diagnostics
97
Verification Menu
98
Gas Valve Password & Login Menu
100
SECTION 10 Parameter Tables
101
SECTION 11 Initial Startup Instructions
105
Filling the Boiler System
105
Initial Operation
106
Initial Burner Operation
106
Shutting down the Unit
106
Restarting the Unit
106
Combustion Setup
107
Firing Rate for Boiler
107
Combustion at the Gas Valve Display
108
SECTION 12 Maintenance
109
System Maintenance
109
Maintenance Notes
109
Burner
109
Gas Valve / Venturi
109
Main Controller
110
Valve Control / Display
110
Spark & Flame Sensors Electrodes
110
Blower
110
Heat Exchanger Tubes
110
Gas Pressure Switches
111
SECTION 13 Troubleshooting
112
Error Codes
112
SV2 Fault Codes
116
SECTION 14 Replacement Parts
123
General Information
123
Component Illustrations, Parts Lists, and Part Numbers
123

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Laars OMNITHERM ONH1250 Assembly, Installation And Operation Instructions (136 pages)

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