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Part number 550-100-260/0520
17
ECO
®
Tec
GAS-FIRED WATER BOILER – 80/110/150/199 BOILER MANUAL
Gas Valve Course Adjustments
1. Prior to the boiler’s fi rst ignition, adjust the throttle adjustment
screw (2.5mm Allen Head) by fi rst turning the screw clockwise
(3) until it bottoms out – do not apply any additional or excess
torque. Adjust the throttle screw in a counterclockwise (4)
direction with precisely the number of turns listed in Table 2,
according to the boiler model/size.
2. After the throttle has been adjusted coarsely, the offset regulating
screw must be adjusted for the 80 and 110 models. Remove the
sealed, Allen (4mm)head cap protecting the offset regulating
screw before making adjustments. It is critical to be precise for
the adjustment of the offset regulating screw. DO NOT attempt
to bottom out the offset regulating screw as was done for the
throttle adjustment. Adjustments to the offset regulating screw
should be made from the factory-provided natural gas position.
3. Reconnect wire harness to gas valve.
4. Restore electrical power, turn on gas by opening manual gas
valve and check for leaks and ensure all calls for heat & DHW
have been shut off.
Boiler
Model
Throttle Turns
(Counterclockwise 4 from
Bottom-out Position)
(Counterclockwise 4
Factory NG Position )
80/110 LP
6-3/4 1/8
150 LP
10-3/4 0
199 LP
13 0
Gas valve adjustment locations—ONLY for use
by a qualifi ed technician, using properly working,
calibrated combustion test instruments.
Offset regulating screw adjustment—(a)
Marking factory-provided NG position. (b)
View after turn CCW adjustment.
Gas conversions (continued)
Adjust the offset regulating screw using the
following steps, referencing Figure 19 :
1. After removing cap, insert Allen wrench into offset hex
feature (4mm Allen Head) and mark position of wrench
on offset housing.
2. Turn the offset regulating screw counterclockwise (4),
according to ensuring that the Allen wrench is
moved accordingly, as shown in Figure 19 b.
Final Conversion Steps
1. When boiler has not been fi red, follow instructions on the
initial screens to select propane as the gas type and ensure all
calls for heat & DHW have been shut off. If natural gas was
already selected in the boiler control, the gas type parameter
will need to be adjusted. In the contractor menu, under
the Boiler Settings menu, adjust the “Fuel Type” setting to
“ Propane”, see Figure 81, page 88 .
2. Before fi ring, verify that the Boiler Settings are for LP gas,
“Max Rate” for the input (priority) used to fi re the boiler is
set between 96% and 100%. Also verify that the ‘Min Rate”
is set to 10%. Adjust control settings if not at proper rate.
Verify that boiler is operating at the expected fi ring rate at
both high- and low-fi re during combustion analysis. Refer
to Figure 99, page 111 for proper low-fi re rate based on
altitude settings.
Course adjustment settings — Throttle and offset
adjustments to be made prior to fi rst ignition, by size.
ECO
Tec fuel type setting screen
Turn clockwise
to increase CO
2
. 3
Turn counter-clockwise to
decrease CO
2
. 4
Note: Must remove cover.
Throttle adjustment screw
Turn counter-clockwise
to increase CO
2
. 4
Turn clockwise to
decrease CO
2
. 3
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