510
Indoor / 510 Outdoor Service Manual
Ver. 1.00
63
CONFIDENTIAL
12-12. Adjusting manifold gas pressure
The manifold gas pressure on the 510 Indoor or 510 Outdoor 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 510 Indoor or 510 Outdoor,
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 the Technical Services Department.
Adjusting maximum manifold pressure
1. Ensure that 510 Indoor or 510 Outdoor is not in operation.
2. Remove the screw off the manifold port of the 510 Indoor or 510 Outdoor. (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 510 Indoor or 510 Outdoor to activate its operation. If presence of a gas leak
is detected, immediately shut off the 510 Indoor or 510 Outdoor and inspect the tube/manifold
connection; otherwise, proceed onto the next step.
5. Press and hold down the “MAX” button on the 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. After gas pressure has been set, deactivate the 510 Indoor or 510 Outdoor, remove the manometer
tube, and replace the port screw.
Adjusting minimum manifold pressure
1. Ensure that 510 Indoor or 510 Outdoor is not in operation.
2. Remove the screw off the manifold port of the 510 Indoor or 510 Outdoor. (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 510 Indoor or 510 Outdoor to activate its operation. If presence of a gas leak
is detected, immediately shut off the 510 Indoor or 510 Outdoor and inspect the tube/manifold
connection; otherwise, proceed onto the next step.
5. Press and hold down the “MIN” button on the computer board. While holding down the “MIN”
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
WARNING
