9
ROBERTS
-
GORDON
Fuel Conversion Instructions
After conversion, check operation of the unit:
a. Turn on gas and electrical power to system and unit.
b. Cycle thermostat.
c. When unit cycles, the spark ignitor should ignite the main flame
immediately.
NOTE: When converting from natural to propane gas, there may be a
delay until the gas is purged from the system.
d. Observe the flame quality: look for a steady even flame with no pull-off
from the burner face (indicating a lean condition) or a bushy green
flame (indicating rich mixture).
e. Replace doors and wing screws.
f.
Do Not Adjust The Zero Regulator
NOTE: The manifold pressure, as listed on the serial plate and on the gas
conversion plate (
Page 10, Figure 4), for CORAYVAC
®
is always
-0.7” w.c. This is a nominal figure derived using a CRV-B-10
Natural Gas unit under laboratory conditions. The actual manifold
pressure will vary from 0” w.c. to -1.5” w.c. or more depending on
the system configuration, system vacuum and burner rate and
location. Manifold pressure, or vacuum at the orifice, is normally
less negative then the system or “end vent vacuum” while the unit
is operating.
If any step is unclear, please contact your ROBERTS GORDON
®
independent distributor or Roberts-Gordon at (716) 852-4400 or
(800) 828-7450 in the U.S., (905) 945-5403 Canada or
at www.rg-inc.com.
Step 2
