35
1. Standing Pilot (24) Sequence of Operation
a. Normal Operation
i.
Thermostat or operating control calls for
heat. Vent Damper (if used) opens.
ii.
Gas valves are energized allowing main gas
flow and ignition of main burners.
iii.
Call or heat ends. Gas valves are de-
energized, extinguishing main flame. Vent
Damper (if used) closes.
b. Safety Shutdown
i.
Limit: Automatically interrupts main burner
operation when water temperature exceeds
set point. Maximum allowable temperature
is 250°F. Circulator continues to operate
with call for heat, Vent Damper (if used)
closes. Normal operation resumes when
water temperature falls below set point.
ii.
Blocked Vent Switch: Automatically
interrupts main burner operation when
excessive flue gas spillage occurs.
Circulator continues to operate and Vent
Damper (if used) remains open with call
for heat. If blocked vent switch is activated
do not attempt to place boiler in operation.
Correct cause of spillage and reset blocked
vent switch.
iii.
Flame Roll-out Switch: Automatically
interrupts main burner operation when
flames or excessive heat are present in
vestibule. Circulator continues to operate
and Vent Damper (if used) remains open
with call for heat. Control is single use
device. If flame roll-out switch is activated,
do not attempt to place boiler in operation.
Correct cause of spillage and replace flame
roll-out switch.
iv.
Thermocouple: Senses pilot flame and
causes gas valves to turn off main burner
and pilot burner gas flow should pilot burner
flame extinguish. Circulator continues to
operate and Vent Damper (if used) remains
open with call for heat.
Table 10: Sequence of Operation and Wiring Diagrams
Ignition System
Country
Fuel
Boiler Sizes
Wiring Diagram Figure
Sequence of
Operation
Continuous
Intermittent
Standing Pilot (24V)
USA &
Canada
Natural Gas
6 & 7 Sect.
Figure 27
Figure 28
Page 35
LP Gas
Intermittent Ignition
(Honeywell EI - 24V)
USA
Natural Gas
5 - 10 Sect.
Figure 30
Figure 31
Page 38
LP Gas
Canada
Natural Gas
5 - 10 Sect.
Figure 32
Figure 33
LP Gas
5 - 7 Sect.
Intermittent Ignition
(EP - 120V)
USA &
Canada
Natural Gas
6 - 10 Sect.
Figure 34
Figure 35
Page 44
LP Gas
Not Available
Intermittent Ignition
(EP-CSD-1 - 120V)
USA
Natural Gas
8 - 10 Sect.
Figure 34
Figure 35
Page 44
Summary of Contents for 805H
Page 15: ...15 Figure 8 Jacket Assembly...
Page 16: ...16 Figure 9 EP Control Installation...
Page 18: ...18 Figure 10 Schematic Gas Piping 24V Standing Pilot 806H 807HE...
Page 19: ...19 Figure 11 Main Gas Piping Intermittent Ignition EI...
Page 20: ...20 Figure 12 Schematic Pilot Piping Honeywell EI USA...
Page 22: ...22 Figure 14 Schematic Gas Piping EP Control System Natural Gas Only 806H 810HE...
Page 23: ...23 Figure 15 Schematic Gas Piping EP CSD 1 Control System 808HE 810HE...
Page 36: ...36 Figure 27 Wiring Diagram Standing Pilot 24V Continuous Circulation 806H 807HE...
Page 37: ...37 Figure 28 Wiring Diagram Standing Pilot 24V Intermittent Circulation 806H 807HE...
Page 39: ...39 Figure 29 Wiring Diagram Honeywell EI USA Canada 805 Only with Hydrostat 3200 Control...
Page 40: ...40 Figure 30 Wiring Diagram Honeywell EI USA Continuous Circulation 806 810...
Page 41: ...41 Figure 31 Wiring Diagram Honeywell EI USA Intermittent Circulation 806 810...
Page 50: ...50 Figure 40 Lighting Instructions 24V Standing Pilot...
Page 51: ...51 Figure 41 Operating Instructions EI...
Page 52: ...52 Figure 42 Operating Instructions EP...
Page 61: ...61 Honeywell EI Trouble Shooting Guide...
Page 76: ...76...
Page 78: ...78...
Page 82: ...82...
Page 83: ...83...
Page 84: ...84...