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START UP CHECKLIST & REPORT – Direct Fired MUA models MCV/MVV, DCV/DVV
VERIFICATION OF OPERATION
NOTE: Refer to the Wiring Diagram, Sequence of Operation, and I&S Manual for this section.
Fan Operation
1.
The motorized (inlet –or– discharge) Damper is fully open when fan comes on:
2.
The low temperature limit switch is field set at: ______ºF (factory set at 40ºF)
3.
The low temperature limit timer (TDR) completes its cycle in: ______ minutes ______ seconds (normal: 5 minutes)
4.
Fan Rotation is in the same direction as the rotation arrow:
5.
Discharge External Static Pressure: ______ "WC
6.
Check the following (Verify the motor running amps does not exceed the motor nameplate FLA.):
Unit Off
A-B ______ Volts
B-C ______ Volts
A-C ______ Volts
7.
Approximate Outdoor Air Temperature: _______°F
Burner Operation
1.
The Profile Pressure Drop is: _____" WC (measured using taps provided near air flow switch).
2.
Burner Pressure Measurements:
Suction Static Pressure:
High Fire Pressure:
Note: Manifold Pressure = Suction Pressure + High Fire Pressure (Example: -1.2 +3.4 = 4.6...ignore signs)
Refer to the unit rating plate for correct high fire manifold pressure and I&S Manual.
3.
The High Temperature Limit Switch is field set to: _____ºF (maximum recommended setting is 130ºF)
4.
The Low Gas Pressure Switch is field set to: _____" WC (factory set at 3" WC)
5.
The High Gas Pressure Switch is field set to: _____" WC (factory set at 1.5" WC above high fire pressure)
6.
The Low & High Air Flow Switch (LAFS/HAFS) is factory set and cannot be adjusted!
7.
The pilot flame (low fire) should be the approximate size of a baseball:
NOTE: Set low fire gas pressure so there is a continuous "ribbon" of flame approximately 1" wide across face of
burner.
8.
Flame Relay (pilot ignition only):
For Fireye controllers, it should read 4.0 to 10.0 VDC at terminals marked (+ -) on the flame relay face.
9.
Mild Weather Stat (optional):
Trips the burner when outside air temp is higher than the stat set point:
Setpoint _____ºF (factory set at 65ºF).
Maxitrol Temperature Control System
1.
Modulating Regulating Valve ("MR Valve"):
2.
Check calibration of the Discharge Temperature Sensor. Adjust if necessary.
3.
(Maxitrol 44 Only) The Discharge Temperature Limits are field set at:
Minimum _____ºF (factory set at 55ºF)
Maximum _____ºF (factory set at 95ºF - maximum is 120ºF)
4.
(Maxitrol 44 Only) Burner responds to demand for heat from Room Temperature Selector in remote panel:
5.
Operation of Occupied/Unoccupied Switch (if applicable) or time clock verified:
6.
Is there evidence of temperature hunting?
** Refer to the Troubleshooting Guide in the I&S Manual for further instructions.
4
44
Fan Running (burner off)
A-B
_____ Volts _____ Amps
B-C
_____ Volts _____ Amps
A-C
_____ Volts _____ Amps
_____" WC (measured at the manifold pressure tap with unit fan on and gas off).
_____" WC (measured as above, but with fan and gas on, and unit in forced high fire).
Voltage at Low Fire: _____ Vdc
Voltage at High Fire: _____ Vdc
7
5 -
5
2
0 .
7-510.1
Yes
N/A
N/A
Yes
N/A
N/A
Yes
(adjust as needed)
Yes
Yes
N/A
Yes
Yes
N/A
No
Yes**
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