Operator`s manual

PUREHEAT™ HYDRONIC AIR HEATER OPERATOR’S MANUAL – SECTION 4
V. 2, Rev. 09/01/06 © 2006 Ground Heaters, Inc. 4- 5
4.3 HIGH ALTITUDE OPERATIONS
1. The following procedures are recommended when operating the Pureheat™ at altitudes higher than
5,000 ft (1,524 m) asl. These procedures keep the Pureheat™ running smoothly and prevent the
possibility of premature soot build-up inside the hydronic heater fire tubes. ALL PROCEDURES
LISTED BELOW SHOULD BE PERFORMED BY CERTIFIED PERSONNEL AT YOUR GROUND
HEATERS DISTRIBUTOR.
2. When operating the Pureheat™ at high altitudes, the hydronic heater should be checked every 500
hours for sooting or other combustion abnormalities. Combustion Analyzer and Smoke Spot Tester
must be used for this test.
3. In addition to air adjustments, fuel pressure may be reduced to a lower pressure. To
decrease fuel
burning
rate, refer to Section 3, BURNER ADJUSTMENT AND SHUTDOWN for fuel pressure
adjustment instructions.
NOTE: Always verify Burner exhaust O
2
and smoke levels after completing any adjustments to fuel
pressure as directed in Section 3.1.1, Gas Burner Adjustment or 3.2.1, Diesel Burner Adjustment.
4.4 RECOMMENDED FUELS
1. Pureheat™ Hydronic Air Heaters are typically used outdoors, in cold weather.
Care must be taken in selecting a fuel blend which will work properly in your jobsite
conditions.
2. Diesel fuel will thicken (gel) at low temperatures. Gelling (also known as waxing) may cause the
Burner not to light and/or fuel pump damage.
3. Contact your
local fuel supplier to obtain potential gelling temperatures for your fuel, as specifications
for diesel fuel vary from terminal to terminal. Some fuel suppliers may add products such as
ValveTect to prevent gelling or Diesel 911 after gelling has occurred. Your fuel supplier should
supply this information and make recommendations for the selection and use of such products.
4. If ambient temperatures are such that your fuel supplier cannot insure the fuel will
not gel, K1
Kerosene or #1 diesel fuel (dyed K1 for off-road use) must be added by ratio until gelling does not
occur.
5. Refer to the Fuel Blend Guide, below; consult your fuel supplier for assistance in calibrating these
values to your
fuel.
DIESEL FUEL SELECTION
Low overnight ambient air temperatures can cause diesel fuels to gel.
Gelled fuel will cause the Burner not to light and/or fuel pump damage.
ALWAYS USE THE PROPER FUEL
LOWEST EXPECTED
AMBIENT AIR TEMPERATURE
PROPER
FUEL
5ºF AND BELOW
100% #1 DIESEL
OR
100% K-1 KEROSENE
5ºF TO 25ºF
50% #2 DIESEL
+ BLEND
50% #1 DIESEL
ABOVE 25ºF WINTER BLEND DIESEL
Require your fuel supplier to guarantee that the fuel supplied will not gel at
the lowest
temperature which will be experienced at your work site.
!