lp-673 Rev. 000 Rel. 001 Date 8.30.18
35
It is very important that the combustion system be set within the
recommended CO measurements listed in Table 20. Visually looking
at the burner does not determine combustion quality. Failure to
measure combustion with a Combustion Analyzer and set the
throttle within the recommended CO measurements could result in
property damage, severe personal injury, or death.
Natural Gas
LP Gas
Fan Speed
Low
High
Low
High
CO PPM
<175
<175
CO
2
(%)
8 - 9 1/2
8 1/2 - 10
9 - 10 1/2
9 1/2 - 11
Table 24 - Combustion Settings
2. When low fire settings have been obtained, flip DIP switch seven
(7) to its original (OFF) position. This will return the heater to normal
operation.
3. Flip DIP switch six (6) to ON (high fire). Again check combustion
readings with a combustion analyzer.
NOTE:
DO NOT adjust the gas valve offset screw at high fire. The offset
screw is only used to adjust combustion values at low fire.
4. When complete, flip DIP switch six (6) to its original (OFF) position.
This will return the heater to normal operation.
5. Allow heater to operate normally. Ensure it is operating properly.
6. Reinstall the heater front cover.
7. Use a Phillips Head screwdriver to reinstall the heater top cover.
Part 9 - Controls
A. Control and Display Overviews
Press this Button Less than 5 Seconds
Turns Control Power Panel ON/OFF
Hold this Button More than 5 Seconds
When Control Panel Power is ON
Status Display Mode
When Control Panel Power is OFF
Installer Mode
Press this Button Less than 5 Seconds
Access and Change DHW Set-Point Temperature
95 – 140
o
F (37.8 – 49
o
C)
NOTE:
If Installer Mode Parameter 25:rE is
changed to Co, Set-Point Temperature can be
changed to 160
o
F
Hold this Button More than 5 Seconds
Change Current Time Se
tti
ng
Year/Month/Date/Hour/Minute/Day of Week
Press this Button Less than 5 Seconds
Select Menu by Pressing Dial Bu
tto
n
Scroll Values by Turning Dial Clo) or Counterclockwise(-)
Figure 36 - Control Panel Detail
Cascade Status
Displayed Number Indicates Cascaded Unit
Full On Rectangular Icon Under Number Indicates Unit is Running
Flashing Rectangular Icon Under Number Indicates Unit Error
Flame On
Celsius and
Fahrenheit Indicators
Eight (8) Segment Display with
Colon and Decimals Displays
Numerals and Characters
Appliance is in a
Communication State
Status Display Mode or
Installer Mode is Operational
Building Management – 0-10V Input:
Allows the Water Heater to be controlled by
a Building Management System (BMS)
NOTE:
Icon will only appear if 0-10 Volt is
connected.
Anti-Freeze Mode
is Operational
Current Time
Current Day of Week
Appliance is Meeting DHW Demand
Service Reminder
Fan On
System Pump On
Heater Pump On
Figure 37 - LCD Display