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Installation
Figure 25. Two-stage and Mod gas train for 1000 MBh
High gas switch
Figure 26. Ultra modulating gas train for 500 to 850
MBh
Ratio Regulator
Main Gas
Solenoid
Valves
Pilot Pressure
Regulator
Main Gas
Regulator
To Combustion
Air Sensor
44
Ratio regulator
Manual shut-off valve
Main gas
solenoid
valves
Low gas
To combustion
switch
air sensor
Manual shut-off
vavle with 1" field
connection
Burner
Manual
Gas Manifold
Shut-off
Valve
Pilot Solenoid
Valve
Manual Shut-off
Valve
1" Field
Elbow Connection
Figure 27. Ultra modulating 1000 MBh
Manual
shut-off
valve
Burner
gas
manifold
Connection
into burner
box
1 1/4"
field elbow
connection
Flue Assembly Installation
1. Locate the flue assembly and the extension (refer to
Figure 28, p. 45
section of the unit.
2. Install the flue extension onto the flue assembly as
shown in
Figure 28, p.
Connections
into Burner
Box
3. Slide the pipe clamp onto the heater flue tube located
inside the heater compartment.
4. Insert the tube on the flue assembly into the hole
located in the vertical support for the heat section.
5. Butt both tube sections together and center the pipe
clamp over joint.
6. Using the pre-punch holes in the flue assembly,
extension, and the vertical support, install the
appropriate number of mounting brackets (Refer to the
installation instructions that ship with the flue
assembly.)
Ratio
regulator
Pilot
Pilot
To combustion
pressure
solenoid
air sensor
regulator
valve
Manual
shut-off
valve
Main gas
regulator
for extension usage) in the ship with
45.
RT-SVX072D-EN
Main gas
solenoid
valves
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