SERVICE ULTIMATE RESTAURANT RANGES
P
AGE
26
OF
48 O
WNER
’
S
M
ANUAL
1190820
REV
3
(11/10)
Figure 11
Convection-Oven Blower Does Not Run, Continued
A

DJUSTMENT OF

G

AS

P

RESSURE

R

EGULATOR

The pressure regulator is factory set at 4" W.C. (0.99 kPa) for natural gas and 1 0" W.C. (2.48 kPa) for propane gas.
To check the manifold pressure:
1. Turn all therm ostats and burner control knobs to OFF position.
2. Turn m ain gas valve to entire range off.
3. Remove contr ol panel and locate the small plug in the manifold.
4. Remove plug and install a fitting appropriate to connect a manometer.
5. Turn on m ain gas to range and light pilots.
6. Turn all burner s and ovens to full ON position and read manometer.
7. If manom eter does not read 4" W.C. (0.99 kPa) for natural gas, or 10" W.C. (2.48 kPa) for propane gas, adjust
regulator (if gas pressure is correct go to Step 10).
8. Remove cap f rom top of regulator.
9. W ith a screwdriver rotate regulator adjustment screw clockwise to increase, or counterclockwise to decrease,
pressure until manometer shows correct reading.
10. Repeat steps 1 and 2.
11. Remove manometer f itting and replace plug in manifold.
12. Turn on main gas to range and light pilots.
13. Replace control panel.
ISCONNECT POWER AT CIRCUIT BREAKER
.
(Continuing from previous page.)
Is there voltage?
No
Yes
Remove the wire terminal cover from the blower motor.
Check all wiring for loose terminals or breaks.
Check that the common wire is connected to the motor black wire.
Reconnect the power supply and turn on blower-control switch.
Use a voltmeter to measure the voltage between the black wire and
the white wire.
Remove the wire nuts from the red, white, and black wires.
Check that the resistance across the white and black wires is
approximately 1.9 ohms. Check that the resistance across the
white and red wires is also approximately 1.9 ohms. If either
resistance is incorrect, replace the blower motor.
DISCONNECT POWER AT CIRCUIT BREAKER
.
Check that the red wire is capped off.
Remove the wire nuts from the black and the white wires. Check
that in each case the wires are twisted together securely.
Check that the neutral wire is connected to the white wire.
CHECK THAT POWER IS DISCONNECTED
AT CIRCUIT BREAKER.