D7W TS.pdf - Espar
D7W TS.pdf - Espar D7W TS.pdf - Espar
17 III Heater Operation 3. Running 1. Pre-Start Procedures Upon completion of installation prepare the heater as follows: - Check all fuel, electrical and plumbing connections. - Refill the engine coolant - Bleed air from the coolant system by loosening the top heater hose to allow air to escape. Resecure the heater hose. - Run engine to further bleed the system. - Top up engine coolant. 2. Start Up Once switched on the following sequence occurs: - Combustion air blower starts. - Water pump starts. - Control unit checks all functions. - Glow plug begins to preheat combustion chamber. - Control unit checks input voltage (under or over voltage will cause heater to shut down). - After the 20-50 second combustion chamber preheat the fuel pump will start. - Once ignition takes place the flame sensor will automatically switch the glow plug off (ignition time: 1-3 minutes maximum). Note: If the heater fails to start the first time it will automatically attempt a second start. If unsuccessful the heater will shut down completely. Note: On initial start up the heater may require several start attempts to self prime the fuel system Once ignition is successful the following operations take place: - Heater runs in full heat mode. - Once coolant reaches 194°F (90°C) the heater automatically switches to low heat mode and continues to run. - If coolant temperature drops to 176°F (80°C) the heater will automatically switch back to full heat mode. - If coolant temperature continues to rise, the heater will automatically switch off once coolant temperature reaches 201°F (94°C). - The water pump will continue to circulate coolant to allow the heater to monitor engine temperature. - The heater will automatically re-start once coolant temperature reaches 176°F (80°C). - The heater will continue to run as described above until it is switched OFF, either manually, automatically by a timer or heater malfunction shutdown. Note: While in running mode if the heater should shut down due to flame out, it wil automatically attempt one restart, if successful it will continue to run, if not it shuts down completely. Note: During operation the heater continually senses the input voltage from the batteries, if the input voltage drops to approximately 10.0 volts (20.0 V for a 24 V system) the heater will automatically shut down. 4. Switching Off When the heater is switched off, manually or automatically, it starts a controlled cool down cycle. - The fuel metering pump stops delivering fuel and the flame is extinguished. - The glow plug is re-energized for a 15 second after glow. - The combustion air blower and water pump continue to run for a three (3) minute cool down cycle, then switch OFF.
18 Warning: Warning: The heater must be switched OFF while any fuel tank on the vehicle is being filled. The heater MUST NOT be operated in garages or enclosed areas. 5. Safety Equipment The control unit, overheat switch and flame sensor continually monitor heater functions and will shut down the heater in case of a malfunction. - The control unit ensures electrical circuits (glow plug, fuel metering pump, combustion air blower etc.) are complete prior to starting the heater. - If the heater fails to ignite within 90 seconds of the fuel pump being started, the starting proce dure will be repeated. If the heater again fails to ignite after 90 seconds of fuel being pumped, a “no” start safety shutdown” follows. - If the heater flames out during operation, the heater automatically attempts to restart. If the heater fails to ignite within 90 seconds of fuel delivery, or ignites but flames out again within 3 minutes, “flame out” shutdown follows. - Overheating due to lack of water, a restriction or a poorly bled coolant system results in the safety cutout switch tripping. Fuel delivery will cease and an “overheat shut down” follows. - If at any time the voltage drops below 10.0v or 20.0v (for 24V), or rises above 14.0v or 28.0v (for 24V), “high/low voltage” shutdown follows (after a 20 second delay).
- Page 2 and 3: Table of contents D7W Boxed I. Intr
- Page 4 and 5: 3 2. Heater Warnings Warning To Ins
- Page 6 and 7: 5 4. Principal Dimensions D7W Boxed
- Page 8 and 9: 7 II. Installation Procedures 1. He
- Page 10 and 11: 9 When being used to provide bunk h
- Page 12 and 13: 11 B) Fuel Metering Pump If the pum
- Page 14 and 15: 13 5. Electrical Connections Cautio
- Page 16 and 17: 15 7. Operating Switches A Push/Pul
- Page 20 and 21: 6. Operational Flow Chart 19
- Page 22 and 23: 21 IV. Maintenance Troubleshooting
- Page 24: 23 C. Self Diagnostics Troubleshoot
- Page 29 and 30: 28 Table 1 - Components Resistance
- Page 31 and 32: Figures IV F 30
- Page 33 and 34: 32 Figure IV I When replacing the g
- Page 35 and 36: 34 Figure IV O 7A. Flame Sensor Rep
- Page 37 and 38: 36 10. Water Pump Replacement - Bef
- Page 39 and 40: Universal Model Boxed Model 25 1807
- Page 41 and 42: 40 3. Universal Models 25 1807, 25
- Page 43 and 44: D7W Universal Model 25 1807 42
- Page 45 and 46: D7W Boxed with Espar Heat Exchanger
- Page 47 and 48: D7W Boxed Freightliner Model 25 180
- Page 49 and 50: 48 D7W Parts Diagram Main Heater Co
- Page 51 and 52: 50 Universal Parts Models 25 1807 2
- Page 53 and 54: 52 Ref. No. Description Part Number
- Page 55 and 56: 54 Ref. No. Description Part Number
- Page 57 and 58: 56 Ref. No. Description Part Number
18<br />
Warning:<br />
Warning:<br />
The heater must be<br />
switched OFF while any fuel<br />
tank on the vehicle is being<br />
filled.<br />
The heater MUST NOT be<br />
operated in garages or<br />
enclosed areas.<br />
5. Safety Equipment<br />
The control unit, overheat switch and flame sensor<br />
continually monitor heater functions and will shut<br />
down the heater in case of a malfunction.<br />
- The control unit ensures electrical circuits (glow<br />
plug, fuel metering pump, combustion air blower<br />
etc.) are complete prior to starting the heater.<br />
- If the heater fails to ignite within 90 seconds of<br />
the fuel pump being started, the starting proce<br />
dure will be repeated. If the heater again fails to<br />
ignite after 90 seconds of fuel being pumped, a<br />
“no” start safety shutdown” follows.<br />
- If the heater flames out during operation, the<br />
heater automatically attempts to restart. If the<br />
heater fails to ignite within 90 seconds of fuel<br />
delivery, or ignites but flames out again within 3<br />
minutes, “flame out” shutdown follows.<br />
- Overheating due to lack of water, a restriction<br />
or a poorly bled coolant system results in the<br />
safety cutout switch tripping. Fuel delivery will<br />
cease and an “overheat shut down” follows.<br />
- If at any time the voltage drops below 10.0v or<br />
20.0v (for 24V), or rises above 14.0v or 28.0v<br />
(for 24V), “high/low voltage” shutdown follows<br />
(after a 20 second delay).
Change language