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Lochinvar
1.5, 3.5, 2.5 service manual
Models:
3.5
2.5
1.5
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Troubleshooting
Install
Maintenance
Check ignition ground wiring
Address reported problems
C Outdoor Reset
4 Setup Screen
Combustion Analysis Procedure
11 History Screen Lockout Faults
Delay
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NOTES
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Contents
Models
DANGER
Hazard definitions
Contents
NIOSH stated First Aid
Please read before proceeding
Handling ceramic fiber materials
REMOVAL OF COMBUSTION CHAMBER LINING
Freeze protection fluids
When servicing boiler
Boiler operation
Boiler water
Troubleshooting
What is in this manual?
Service
Maintenance
Boiler piping
1 Service
Home Screen
1 Service continued
1 Service
Control inputs
SMART CONTROL MODULE
LINE VOLTAGE
Control outputs
SMART CONTROL MODULE
LOW VOLTAGE CONNECTION BOARD
Figure 1-3 Password Screen
General Operation
1 Service
Access modes
Figure 1-5 Initial Setup Screen
Figure 1-4 Setup Screen
To adjust and save parameters reference FIG
1 Service
Sequence of operation
Table 1A Sequence of Operation
Parameter table
RAMP
1 Service
DELAY
Parameter table
SH NIGHT
SETUP
Parameter table
SETBACK
HWG NIGHT
1 Service
Parameter table
SETBACK
PUMPS
Parameter table
B Set Points
Viewable and changeable control parameters
1 Service
A Initial Setup
Figure 1-6 Outdoor Air Reset Curve
C Outdoor Reset
Boost Temperature
1 Service
D Ramp Delay
Shift OA Reset Curve
E BMS
F Advanced Setup
G/H SH/HWG Night Setback
1 Service
Minimum On/Off Time
I ModBus
J Cascade
Cascade Offset
K Pumps
1 Service
Service Notification Cycles
L Service Notification
Service Notification in Months
Service Notification Running Hours
Figure 1-8 Cascade Screen
1 Service Cascade Screen
Figure 1-9 Graph Screen Parameter Selection
Graph Screen
Figure 1-10 Graph Screen
Figure 1-11 History Screen Lockout Faults
1 Service History Screen
Figure 1-12 Graph Screen Blocking Faults
Figure 1-13 History Screen Runtime History
History Screen
Figure 1-14 Service Screen
Service Screen
see the following pages for instructions
2 Maintenance Maintenance and annual startup
Service technician
Owner maintenance
Inspect boiler area
2 Maintenance
Address reported problems
Clean condensate trap
Check expansion tank
2 Maintenance continued
Flue vent system and air piping
Check water system
Check flame signal
Check ignition ground wiring
Check all boiler wiring
Check control settings
Handling ceramic fiber materials
Cleaning boiler heat exchanger
Review with owner
2 Maintenance continued
Check control module fuses
3 Troubleshooting
Before troubleshooting
Check the following
CORRECTIVE ACTION
3 Troubleshooting continued
FAULT
CAUSE
3 Troubleshooting
Checking temperature sensors
Table 3E - Flue Sensor Resistance vs. Temperature
CAUSE
3 Troubleshooting continued
FAULT
Table 3F Troubleshooting Chart - Noisy System
3 Troubleshooting
FAULT
DESCRIPTION
CORRECTIVE ACTION
CORRECTIVE ACTION
3 Troubleshooting continued
FAULT
DESCRIPTION
CORRECTIVE ACTION
3 Troubleshooting
FAULT
DESCRIPTION
CORRECTIVE ACTION
3 Troubleshooting continued
FAULT
DESCRIPTION
CORRECTIVE ACTION
3 Troubleshooting
FAULT
DESCRIPTION
CORRECTIVE ACTION
Troubleshooting continued
DESCRIPTION
FAULT
CORRECTIVE ACTION
3 Troubleshooting
FAULT
DESCRIPTION
CORRECTIVE ACTION
3 Troubleshooting continued
FAULT
DESCRIPTION
CORRECTIVE ACTION
3 Troubleshooting
FAULT
DESCRIPTION
CORRECTIVE ACTION
3 Troubleshooting continued
FAULT
DESCRIPTION
CORRECTIVE ACTION
3 Troubleshooting
FAULT
DESCRIPTION
CORRECTIVE ACTION
3 Troubleshooting continued
FAULT
DESCRIPTION
CORRECTIVE ACTION
Combustion Analysis Procedure
POSSIBLE CAUSE
3 Troubleshooting
Figure 3-3 Gas Valve Adjustment Model
Gas valve adjustment procedure
3 Troubleshooting continued
Figure 3-2 Gas Valve Adjustment Models 1.5 and
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