LAARS NeoTherm LC NTV1700 - Install and Operating Manual - Manual (Page 77)

NeoTherm LC Boilers and Water Heaters Page 73
Required tools: Screwdrivers, Torx bits, combustion
analyzer
In the rest of this section we will explain the setup
procedure in more detail.
1. On the gas valve for the Primary burner on the
boiler, locate the adjustments for the high fire
CO
2
and low fire CO
2
. See Fig. 98 and 99.
Table 17 lists the CO
2
readings you should see
at high fire and low fire.
2. To start the setup, turn on the call for heat.
3. Before you can set up the Primary burner, you
must shut off the Secondary burner. Go to the
‘home’ screen on the display. Press the icon
for the control labeled Secondary.
Fig. 100 – ‘home’ screen
4. The system will present the Status Summary
screen.
Fig. 101 – Status Summary Screen
5. Press the Operation button. The system will
present the Operation screen for the Secondary
burner.
Fig. 102 – Operation Screen
Press the Burner Enable switch in the upper
left-hand corner of the screen. Since you
selected the Secondary control for this boiler,
this will turn off the Secondary burner. The
system will ask you to log in as you do this.
6. Now you can work with the Primary burner
for this boiler. Press the Home icon to go back
to the ‘home’ screen on the display (Fig. 100).
Press the icon for the control labeled Primary.
7. The system will present the Status Summary
screen for the Primary burner. Press the
Operation button.
8. The system will present the Operation screen
for the Primary burner.
Fig. 103 – Operation Screen
Model Gas Type High Fire CO
2
Low Fire CO
2
Pressure Differential
1,000 Natural 8.5% ± 0.2 0.5% lower than high fire CO
2
0.5” to 1.2” wc*
Propane 9.5% ± 0.2 0.5% lower than high fire CO
2
0.5” to 1.2” wc*
1,700 Natural 9.0% ± 0.2 0.5% lower than high fire CO
2
0.5” to 1.2” wc*
Propane 10.0% ± 0.2 0.5% lower than high fire CO
2
0.5” to 1.2” wc*
* - Only check the pressures if there are problems getting the CO
2
and CO values in range.
Table 17 – CO
2
Range and Pressure Differential