15
110327-07 - 2/23
ALTA
Combi Installation, Operating & Service Instructions
6
Preparing Boiler
(continued)
1. Remove vent connector and screws from
miscellaneous parts carton.
2. Check vent reducer on top of heat exchanger to
ensure it is installed properly.
WARNING
Asphyxiation Hazard.
A boiler operating with an improperly installed
vent reducer (3 in. to 2 in.) could cause
unreliable operation at elevated carbon
monoxide levels resulting in severe personal
injury, death, or substantial property damage.
3. Lubricate heat exchanger vent gasket with
soapy water.
4. Insert vent connector through jacket into heat
exchanger with flue gas sample port facing
forward. See Figure 6-2.
5. Tighten 4 screws.
Install Vent Connector
Figure 6-2: Installing Vent Connector
Flue gas sample
port facing front
of boiler
Vent Connector
Attach with
(4) screws
Figure 6-3: Gas Valve Fuel Setting
Preparing for Fuel Conversion
If using LP gas. LP conversion requires (2)
steps: gas valve setting adjustment and control
parameter change.
1. Use 2.5 mm hex wrench to adjust gas valve
setting from “1” to “2” (Figure 6-3). For easy
access to gas valve remove left side panel using
(2) Phillips screws. (136 combi only)
2. See Section 15 “Start-Up and Checkout” for
Control Parameter adjustment instructions.
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