T-M50 / T-M50 ASME Service Manual
Ver. 1.05
73
CONFIDENTIAL
12-19. Adjusting manifold gas pressure
The manifold gas pressure on the T-M50 can be adjusted by following the procedures below.
Adjusting the manifold pressure can cause unexpected combustion conditions during
operation, which can cause a health hazard, damage the T-M50, and/or shorten its lifespan.
Therefore, changing the manifold pressure is not recommended unless there are very
strong reasons to do so (e.g. high elevation installations), and with the consultation of
Technical Services Department.
Adjusting maximum manifold pressure
1. Ensure that T-M50 do not in operation.
2. Remove screw off the manifold port of the desired combustion section of the T-M50. (Figure 1)
3. Connect a manometer to the manifold port using a tube (Figure 2). Ensure that this connection is
secure enough to prevent gas leak.
4. Run water through the T-M50 to activate its operation. If presence of a gas leak is detected,
immediately shut off the T-M50 and inspect the tube/manifold connection; otherwise, proceed onto
the next step.
5. Press and hold down the “MAX” button on that section’s computer board. While holding down the
“MAX” button, press either the “Increase” or “Decrease” button to increase or decrease the manifold
gas pressure, respectively (Figure 3). Refer to the manometer to verify that pressure has been set to
desired value.
6. When the maximum gas pressure of a combustion section is being adjusted, the combustion of the
other combustion section must be set to MINIMUM.
7. Repeat these steps for the other combustion section. The manifold pressure on both combustion
sections must be at the same value.
8. After gas pressure has been set, deactivate the T-M50, remove the manometer tube, and replace the
port screw.
Adjusting minimum manifold pressure
1. Ensure that T-M50 do not in operation.
2. Remove the screw off the manifold port of the desired combustion section of the T-M50. (Figure 1)
3. Connect a manometer to the manifold port using a tube (Figure 2). Ensure that this connection is
secure enough to prevent gas leak.
4. Run water through the T-M50 to activate its operation. If presence of a gas leak is detected,
immediately shut off the T-M50 and inspect the tube/manifold connection; otherwise, proceed onto
the next step.
WARNING
