41
4. CHECK LOW WATER CUT - OFF CONTROL
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ignitor, clean face of cad cell and see that
cell is securely in socket. Check gasket
around perimeter of ignitor lid for proper
seal. If gasket is missing or damaged,
replace gasket. Room light can effect cad
cell resistance. Reset safety switch.
•
Close line switch to boiler. If burner starts
and runs beyond safety switch cut-off
time, cell is good. If not, install new cell.
v.
Power Failure Check: After Flame is
established, turn the power off to the control/
burner. The burner should shut down safely.
When power is restored a normal ignition
sequence should be started.
3. WARNING — Check High Limit Control —
Jumper Thermostat Terminals. Allow burner to
operate until shut-down by limit. Installation is not
considered complete until this check has been made.
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J
Hydrolevel 1150 probe low water cut-off operational
test procedure:
a. Before raising the water level above the Model
1150, turn on power to the boiler and set the
thermostat to call for heat. Both the green
"POWER" LED and amber "LOW WATER"
LED should illuminate. The burner should not
fi re. IMPORTANT: If the burner fi res with no
water at the probe, immediately shut down power
to the boiler and refer to the Trouble Shooting
instructions in manufacturer's literature provided
with the control.
b. Proceed to fi ll the boiler with water. When water
reaches the LWCO position, the burner should
fi re. If the burner does not fi re, refer to the
Trouble Shooting instructions in manufacturer's
literature provided with the control.
c. Turn off the power to the boiler and fi nish fi lling
the system. Lower the thermostat to desired
room temperature setting.
d. Before leaving the job, power up the system
and push the TEST button on the Model 1150
to simulate a low water condition. The amber
"LOW WATER" LED should illuminate and the
burner should shut down.
J.
IF CONTROLS DO NOT MEET
REQUIREMENTS
outlined in Paragraph I.,
replace control and repeat checkout procedures.
Summary of Contents for MPO Series
Page 6: ...6 Figure 1 MPO 84 Thru MPO 231 Water Boiler ...
Page 22: ...22 Figure 13A Water Boiler Piping for Circulator Zoned Heating System Supply Side Circulator ...
Page 38: ...38 Figure 27 L1 L2 and V1 Head Electrode Positioning and Gun Setting Beckett AFG ...
Page 49: ...49 SERVICE RECORD DATE SERVICE PERFORMED ...
Page 50: ...50 Bare Boiler Assembly ...
Page 52: ...52 Bare Boiler Assembly ...
Page 54: ...54 Jacket Assembly ...
Page 56: ...56 MPO84 Thru MPO231 Water Boilers Trim and Controls ...
Page 58: ...58 Beckett AFG Burner ...
Page 61: ...61 Figure A2 LWCO Location ...