6.
The burner
seems to
cycle on and
of
f more
frequently
than what it
should.
7.
The burner
starts, but the
main fan
never comes
on.
• Gas manifold pressure
• Dirt on main air blower or setup
of outlet air duct
• Burner sensor
• Heater Control Unit (HCU)
• Fan sensor
• Heater Control Unit (HCU)
• Blower motor relay
• Current overload on blower motor
• Blower motor
• Use a low pressure gauge (0-15 inches of water column) with 1/8” NPT
inlet.
Install gauge in the pressure tap port located on the output side of the gas
valve. Run the heater
.
Adjust the pressure by turning the pressure adjusting
screw (located on the input side top of the gas valve) counter clockwise until
the gauge reads the proper manifold pressure. Refer to pipe sizing charts in
the Heat W
agon Engineering Guide. Heater requires 9-14” W
.C. inlet pressure.
• Check for dirt or ice buildup on the air inlet or blower wheel. If using duct on
the air outlet, ensure the back pressure does not exceed a static pressure of
.5” W
.C.
• On the heater control unit (HCU) disconnect the wires from terminals X10 and
X1
1. Using an ohm meter
, check the resistance between the two wires for a
reading. Compare to Sensor Resistance Chart page 25. Replace sensor if
reading out of range.
• If all of the above check good, replace the HCU.
• On the heater control unit (HCU) disconnect the wires from terminals X12 and
X13. Using an ohm meter
, check the resistance between the two wires for a
reading. Compare to Sensor Resistance Chart page 25.
• T
urn the 3-position main switch to the fan position. If the blower runs, check the
fan sensor
. If it is good, replace the HCU.
• T
urn the 3-position main switch to the fan position. If the relay pulls in, check
for voltage between the L1 and L2 terminals.
Then check the voltage between
terminals
T1 and
T2.
The voltage should be the same. If it is less than 105
volts, replace the relay
.
• Push the reset button on the overload between terminals
A1 and
A2 on the
motor relay
. If there is no voltage, replace the overload.
• T
urn the 3-position main switch to the fan position. Check for voltage between
terminals
T1 and
T2 on the motor relay
. If the voltage checks at 120 volts,
replace the motor
.
V
G
10
0
0
T
R
OUBLESHOO
T
ING
Sympt
om
P
os
sible
C
aus
es
P
os
sible
Solut
ion
s
11
Summary of Contents for VG1000
Page 18: ...WAYNE BURNER PARTS BREAKDOWN 18 ...
Page 20: ...20 WAYNE BURNER SERVICING ELECTRODE SETTING ...
Page 21: ...21 WAYNE BURNER SERVICING ...
Page 23: ...23 MIDCO BURNER VG1000 ...
Page 24: ...24 WAYNE BURNER Serial No M5659 Lower WAYNE BURNER Serial No M5895 Beyond ...
Page 25: ...MIDCO BURNER VG1000 25 ...
Page 26: ...26 CONTROL BOX MAIN CIRCUIT DIAGRAM CONTROL BOX WIRING DIAGRAM ...
Page 27: ...27 CONTROL BOX WIRING ...
Page 28: ...28 CONTROL BOX PARTS HWP210080 20 HWP 22211 Aux Contact 20 HWP 20582 ...
