Aqua-Hot AHE-100-02S-12 VDC Service Manual Page 35
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© 2011 Aqua-Hot
®
AHE-100-02S Hydronic Heating System Service Manual—Rev. B
SECTION 6: DIESEL-BURNER OVERVIEW
Operational Flow-Chart
Operation sequence once the Aq-
ua-Hot’s Diesel switch is turned
ON
NOTE:
The Diesel switch’s indicator
light will illuminate anytime the
Diesel Burner switch is in the ON
position
The Motor (#2), which turns the
Combustion Air Blower (#5)
and drives the Fuel Pump (#14),
will begin to operate.
NOTE:
If the Aqua-Hot’s coolant temper-
ature is approximately 200°F (+/-
5°F) or higher, the Motor (#2)
will not operate. Only when the
coolant temperature has dropped
below 175(+/-5)°F, and the VDC
Control Thermostat is calling for
heat, will the Motor (#2) begin to
operate.
After approximately 10-25 se-
conds, the Fuel Solenoid Valve
(#6) opens and fuel is sprayed
into the Combustion Chamber
(#11) through the Fuel Nozzle
(#9)
After approximately 10-25 se-
conds, the Fuel Solenoid Valve
(#6) opens and fuel is sprayed
into the Combustion Chamber
(#11) through the Fuel Nozzle
(#9)
Once the ignited air-fuel mixture
(FLAME) is observed by the
Flame Sensor (#13) the Ignition
Coil (#3) will automatically
switch OFF. The combustion
process now continues to operate
unassisted.
The combustion process will con-
tinue to operate in this manner
until one of the following occurs:
A.) The VDC Control
Thermostat, which senses cool-
ant temperature, reaches the pre-
set temperature of approximately
200 (+/-5)° F.
B.) the Aqua-Hot Diesel Burner
Switch is turned OFF.
NOTE:
If process “B” occurs, the Diesel
Burner switch’s Indicator
Light, on the Switch Panel will
go OFF.
Once the heater switches OFF,
thermostatically or manually, the
Fuel Solenoid Valve (#6) closes,
which interrupts the supply of die-
sel fuel to the Fuel Nozzle (#9)
The Motor (#2) will continue to run
for approximately three (3) addi-
tional minutes. This process is re-
ferred to as the Purge-Cycle, which
cools the heater’s internal compo-
nents and purges the Combustion
Chamber (#11) of any residual
exhaust gases.
NOTE:
When the Aqua-Hot’s Diesel Burn-
er is switched OFF by the
VDCControl Thermostat, the fol-
lowing process will take place:
1. The Motor (#2) will shut off
once the three (3) minute
Purge-Cycle has expired.
-THEN-
2. The Aqua-Hot’s Diesel Burner
will automatically turn back ON
once the coolant reaches the preset
temperature of approximately 200
(+/-5) °F
Summary:
The Aqua-Hot’s Diesel-Burner is
operational anytime the operator
moves the Diesel Burner Switch to
the ON position. The Diesel-
Burner will then automatically
maintain the coolant temperature in
the Aqua-Hot Boiler Tank without
additional involvement from the
operator.
- SERVICE MANUAL 1
- AHE-100-02S 1
- — Page 2 — 2
- Table of Contents 3
- This Page Left 5
- Intentionally 5
- IMMINENT 6
- Figure 1 8
- Figure 2 9
- Figure 3 10
- Figure 4 12
- Figure 5 13
- Figure 6 14
- Figure 7 15
- Figure 8 16
- Figure 9 17
- Figure 10 18
- Figure 11 19
- Figure 12 20
- Figure 13 21
- Tempering Valve: 22
- Figure 14 23
- Figure 15 25
- Figure 16 26
- Engine Preheat Pump: 27
- Figure 17 28
- Zone Pumps 29
- Interior heat exchanger Fans 29
- Figure 18 29
- Figure 19 30
- Electrical - AC 31
- Figure 20 32
- Figure 21 33
- Figure 22 33
- Figure 23 34
- Operational Flow-Chart 35
- Figure 24 36
- Figure 25 37
- Figure 26 38
- Figure 27 39
- Figure 28 39
- Figure 29 40
- Figure 30a 41
- Figure 30b 41
- Figure 30c 41
- Figure 31a 42
- Figure 31b 42
- Figure 32 42
- Figure 33 43
- Figure 34a Figure 34b 43
- Figure 35 44
- Figure 36 44
- Figure 37 50
- Figure 38 51
- Figure 39 53
- Figure 40 54
- Figure 41 55
- Figure 42 56
- Figure 43 57
- Figure 44 58
- Figure 45 59
- Figure 51 60
- Figure 47 62
- Figure 48 63
- Figure 49 64
- Figure 50 65
- Figure 52 67
- Diesel-Burner Controller: 68
- Figure 53a 69
- Figure 53b 69
- a. Fuel solenoid 71
- 1: General information 73
- Or pressurized to 17 PSI 74
- — Page 75 — 75
- APPENDIX A: WIRING DIAGRAM 76
- 13 lb Radiator 79
- Figure B1 79
- Figure B2 80
- Figure B3 81
- Figure B4 82
- Figure C1 83
- Figure C2 83
- Figure C3 84
- Figure C4 84
- Figure C5 85
- Figure C6 85
- Figure C7 86
- Figure D1 87
- Figure D2 88
- Figure D3 88
- Figure E1 89
- Figure E2 90
- Figure E3 90
- Figure E4a 91
- Figure E4b 91
- Figure E4c 91
- Figure E5 92
- Figure E6a Figure E6b 93
- Figure E6c 94
- Figure E7 95
- Figure E8 96
- Figure E9 97
- Figure E10 98
- Figure E11 99
- Figure E12 100
- Figure E13a 100
- Figure E13b 100
- Figure E14a 101
- © 2011 Aqua-Hot 102
- Figure F1 103
- — Page 104 — 104
- — Page 105 — 105
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