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UB90-75
User Manuals: Lennox UB90-75 Gas Boiler
Manuals and User Guides for Lennox UB90-75 Gas Boiler. We have
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Lennox UB90-75 Gas Boiler manual available for free PDF download: Installation Instructions Manual
Lennox UB90-75 Installation Instructions Manual (72 pages)
GWB9 GAS-FIRED, DIRECT VENT, CONDENSING, HOT WATER Boiler
Brand:
Lennox
| Category:
Boiler
| Size: 3 MB
Table of Contents
Table of Contents
3
Introduction
5
Boiler Ratings & Capacities
6
7
Boilers for Use at High Altitude
7
Rules for Safe Installation and Operation
9
Before Installing the Boiler
9
Codes
9
Boiler Sizing
10
Considerations for Boiler Location
10
Locating the Boiler
11
Combustion Air and Vent Pipe Requirements
11
Condensate Drain Requirements
12
Foundation Requirements
13
Removal of Existing Boiler from Common Vent System
13
Placing the Boiler
14
Near Boiler Piping
14
Supply and Return Lines
14
Pressure Relief Valve
18
Expansion Tank and Make-Up Water
18
Condensate Drain Piping
21
Filling Condensate Trap with Water
22
Chilled Water Piping
22
Combustion Air and Vent Pipe
22
Connections and Termination
22
Combustion Air and Vent Piping Lengths
24
Installation
28
Gas Supply Piping
28
Check Gas Supply
28
Connecting the Gas Piping
29
Checking the Gas Piping
29
Electrical Wiring
30
Electric Power Supply
30
Install Your Thermostat
31
Connect Circulator Pump Wiring
31
Electrical Wiring
34
Controls and Accessories
35
Integrated Boiler Control (IBC)
35
Gas Control Valve
35
Hot Surface Igniter
35
High Limit Aquastat Control
35
Draft Inducer Temperature Safety Switch
35
Casting Temperature Safety Switch
35
Differential Pressure Air Proving Switch/Blocked Vent Safety Shutoff
35
Draft Inducer
36
Circulator Pump
36
Drain Valve
36
Rated Pressure Relief Valve
36
Blocked Vent Safety Shutoff
36
External Condensate Pump (Optional)
36
Water Treatment & Freeze Protection
37
Piping Recommendations
37
Water Chemistry
37
Cleaning the Hydronic System
38
Freeze Protection
38
Start up
40
A - Filling Boiler with Water and Purging Air for Systems with Diaphragm Type Expansion Tanks
40
B - Purging Air for Systems with Conventional Closed Type Expansion Tanks
40
C - Placing Boiler in Operation
41
Check out Procedure and Adjustment
42
Verify Proper Sequence of Operation
42
Inspect Venting and Air Intake System
43
Inspect Condensate Drain
43
Inspect System Piping
43
Test Ignition System Safety Shutoff Device
43
Test High Limit Control and Adjust
44
Test Other Safety Controls
44
Set Thermostat Heat Anticipator (if Used) and Verify Thermostat Operation
44
Measure the Natural Gas Input Rate
44
Set Thermostat to Desired Room Temperature
45
Review All Instructions
45
Maintanance and Cleaning
48
Beginning of each Heating Season
48
Daily During Heating Season
48
Monthly During Heating Season
49
Periodically During Heating Season
49
End of each Heating Season - Annual Shutdown Procedure
49
Annual Examination and Cleaning of Boiler Components
49
Detailed Sequence of Operation
51
Troubleshooting
54
Differential Air Pressure Switch Check
62
Repair Parts
64
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