12
CORAYVAC
®
HEATING SYSTEMS
Fuel Conversion Instructions
FIGURE 6. Manometer Reading
Step 5
(continued)
With systems designed to operate at maximum vacuum, it may not be
possible to obtain vacuum differential readings at slightly above 3 1/2"
w.c. If so, adjust damper coupling to maximum but equal vacuum read-
ings. Be sure to lock all dampers securely after adjustment.
c. Reset thermostats to desired room temperature.
d. If heat is not required, turn off main switch and close main gas valve.
Manometer
6
5
4
3
2
1
0
1
2
3
4
5
6
6
5
4
3
2
1
0
1
2
3
4
5
6
Remove button plug and insert tubing
about 6"(152mm). Replace plug after test.
End Combustion
Chamber
Approximate reading after adjusting
damper couplings. ( 3 1/2" w.c.)
Approximate reading after adjusting
pump inlet. ( 2"-3" w.c.)
~~
~~
End Vent
