Desa 30-80 - Manual (Page 7)

www.desatech.com 113811-01A 7
SPECIFICATIONS
80,000 Btu 200,000 Btu
Type of Gas Propane/LP Only Propane/LP Only
Gas Supply Pressure to regulator
Maximum Bottle Pressure Bottle Pressure
Minimum 5 psig (34.5 kPa) 15 psig (103 kPa)
Gas Supply Pressure regulator out 11" W.C. (2.74 kPa) 10 psig (68.9 kPa)
Ignition Piezo Ignitor Piezo Ignitor
Minimum Ambient Temp. Rating 0°F (-17.8°C) 0°F (-17.8°C)
Rating 30,000 - 80,000 Btu/hr 75,000 - 200,000 Btu/hr
(8.79 - 23.4 kW) (22.0 - 58.6 kW)
Fuel Consumption 1.4 to 3.7 lb/hr 3.5 - 0.3 lb/hr
(.74 – 1.80 kg/hr) (1.44 - 4.32 kg/hr)
Fuel Orifice Port No. 6 6
Fuel Orifice Port Size 0.0472" 0.0320"
(1.20mm) (.813mm)
TROUBLESHOOTING
WARNING: Never service heater while it is plugged in, connected
to propane supply, operating, or hot. Severe burns and electrical
shock can occur.
REMEDY
1. Open propane supply valve
slowly
2. Close propane supply valve on
propane tank and reopen slowly
3. Replace burner orifice
4. Check to assure ignitor elec-
trode gap is .195" Check wire
lead for damage. Replace
piezo ignitor and/or ignitor
electrode as necessary
5. Clean or replace pilot assembly
1. Relight, hold automatic control
valve button in 45 seconds
2. Check propane tank(s) for
proper gas supply
3. Tighten connection or replace
thermocouple
4. Replace automatic control
valve
1. Turn valve counter clockwise
to HIGH
2. Replace gas orifice
3. Check gas supply; check
regulator output
4. Consult propane gas supplier
OBSERVED FAULT
Burner fails to light
Pilot lights but goes out when
automatic control valve button
is released
Burn rate is low
POSSIBLE CAUSE
1. Propane supply valve closed
on propane tank(s)
2. Excess flow check valve
closed
3. Blockage in burner orifice
4. Piezo ignition system not
sparking
5. Pilot orifice clogged
1. Not enough warm up time
2. Low gas pressure
3. Thermocouple loose or needs
to be replaced
4. Automatic control valve needs
to be replaced
1. Control valve is on LOW
2. Plugged gas orifice
3. Low gas pressure
4. Low fuel supply