Raypak Water Heater FlexGas User Guide

Hi De lt a Fle x Ga s  
Du a l-Fu e l Bo ile rs a n d Wa t e r He a t e rs  
Rising energy costs, regulations and utility incentives have  
increased the demand for dual-fuel appliances. Many state  
and local regulatory agencies require dual-fuel” capability for  
critical facilities, such as hospitals and schools, to ensure  
emergency operation. Until now, the typical equipment solution  
for domestic hot water supply and hydronic heating have been  
gas/oil water heaters and boilers, or propane-air blenders, both  
of which are costly to install and maintain.  
Cost factors are also driving the demand for dual-fuel  
appliances. Companies with rapid fuel-switchover capability  
can take advantage of discounted rates being offered by gas  
utilities throughout the United States for interruptible fuel  
supplies. Then there’s the rising cost of fuel, making the ability  
to switch fuels in response to pricing an attractive proposition.  
With Raypak’s FlexGas Hi Delta boilers and water heaters,  
natural-propane gas switchover is fast and economical.  
And there is no requirement for costly propane-air blenders or  
air compressors.  
Features  
13 models; 300,000 – 2,342,000 BTUH  
Changeover takes less than one minute  
Changeover can be accomplished while firing: simply  
turn the key!  
FUEL SELECTOR SWITCH  
No mechanical components to remove or replace  
Patented dual-fuel system  
CSA-certified  
Factory-installed and tested system  
CONVENTIONAL SYSTEM  
HI DELTA FLEXGAS SYSTEM  
Propane Storage Tanks  
Vapor  
Propane Storage Tanks  
C
H
Propane  
Vapor  
3
8
Vapor  
C H  
Liquid  
Fuel  
3
8
Propane  
Vapor  
Delivery  
Station  
Liquid  
Fuel  
Delivery  
Station  
Propane- Air  
Blender  
Natural Gas  
Pipeline  
Natural Gas  
Distribution System to Burners  
Propan-e Air  
Air  
Compressor  
Air  
(Occasionally Required)  
Natural  
Gas Pipeline  
Natural Gas  
Distribution System to Burners  
Catalog No.: 1000.20A Effective: 07-10-08 Replaces: 01-10-06  
Raypak Inc., 2151 Eastman Ave., Oxnard, CA 93030  
(805) 278-5300 Fax (800) 872-9725  
 

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