Installation, Operation & Maintenance Manual
IM-895
20
VERIFICATION OF OPERATION
NOTE: Refer to the Sequence of Operation & Wiring Diagram in the Owner’s Manual for specific data on this unit.
See Factory Start-up & Test Sheet in the Unit Owner’s Manual to note the unit settings prior to shipment.
I. Fan Operation
1. Fan Rotation is in the same direction as the rotation arrow (on fan):
Check the following:
Unit Off
Unit On/Off Running (Burner Off)
A-B
_________Volts
A-B
_________Volts
_________Amps
B-C _________Volts
B-C _________Volts _________Amps
A-C _________Volts
A-C _________Volts _________Amps
II. Burner Operation
4. The Profile Pressure Drop: __________ " w.c. (measured using high and low pressure ports)
5. The Burner Suction Static Pressure: __________ " w.c. (measured at the manifold pressure tap with unit fan on
and gas off)
6. The Burner High Fire Pressure: __________ " w.c. (measured as above, but with fan and gas on and unit in forced
high fire)
7. The Service Pressure with burner
in high fire
is: __________ " w.c. - or- ________oz. - or- ________psig
8. The High Temperature Limit Switch is field set to: __________ ° F (maximum setting is 150°F)
9. Set the burner low-fire gas pressure so there is a continuous "ribbon" of flame approximately 1" wide across face
of burner.
10. Flame Relay. If a Honeywell model, it should read
1.25 to 5.0 Vdc
at terminals marked (+ -) on the flame relay
face, if Fireye, it should read
4.0 to 10.0 Vdc
at terminals marked (+ -) on the flame relay face.
Verify the motor running
amps does not exceed
the motor nameplate FLA!
1. Enter "Gas Pressure Requireed at Burner for Max Rated Capacity" on rating plate ________" w.c.
3. The resulting pressure (________" w.c.) is the net
pressure required at the BGPT during High Fire
2. Subtract the Negative pressure measured at BGPT
when the fan is operating: ________" w.c.
Forcing High Fire
Δ – Maxitrol 14 System – Disconnect wire 29
Example:
4.6" w.c. on rating plate – 1.2" w.c. burner suction (measured with just fan running = 3.4" w.c. net measured at the BGPT.