Installation Instructions
Figure 25
5. Loosen the screw indicated in the fi gure below and connect a manometer to
the inlet pressure port. Reset the manometer to zero before use.
Figure 26
6. Re-open the manual gas shut-off valve and check for leaks.
7. Open multiple fi xtures that have high fl ow rates, such as bathtub and shower
faucets, to ramp up the boiler to its maximum fi ring rate.
2 8 |
8. When the boiler reaches its maximum fi ring rate, check the inlet gas pressure
reading on the manometer. The gas pressure must fall within the ranges
specifi ed in "Specifi cations" on page 8.
Figure 27
9. Tighten the inlet gas pressure screw.
10. Replace the front cover and tighten the 2 Phillips screws to secure it to the
case.
Singular Combi Boiler - BTC 439003301 B (2021/07)