3
PART 1
INSTALLATION
FOR YOUR SAFETY
DO NOT STORE OR USE GASOLINE OR OTHER
FLAMMABLE, COMBUSTIBLE OR CORROSIVE
VAPOURS AND LIQUIDS IN THE VICINITY OF THIS
APPLIANCE.
1) HGC LINE
HGC boilers and water heaters are natural or propane
gas fired units and are available with inputs ranging
from 404,000 BTU/h to 1,1515,000 BTU/h. The model
designations are as follows:
FIGURE 1
HGC Series
HGC - 0000 - XX – X X X X
Aquastat :
N : Standard
Evacuation :
N : Chimney
V : SWV HGC-808 to HGC-1313
Relief valve :
1 : 150 Lbs (HGC-HW)
5 : 50 Lbs (HGC-AC)
9 : 90 Lbs (HGC-AC)
Ignition and gas type :
E : Electronic, natural
P : Constant, Propane (HGC-0404 to HGC-0909)
C : Constant, Natural
Heat exchanger :
AC : Steel
HW : Stainless steel
Capacity (Input) in thousands of BTU/h
0404 0505 0606
0707 0808 0909
1010 1111 1212
1313 1414 1515
Unit name :
HGC : Commercial Gas Hydronic
2) DESCRIPTIONS OF MAIN
COMPONENTS
2.1) Heat exchanger
The heat exchanger consists of ten (10) integral copper
finned tubes assembled between two (2) steel
manifolds. A double pass system is used. Standard
components used in conjunction with the exchanger
include a temperature/pressure gauge, a safety valve, a
temperature limiting device, a flow switch and a drain
valve.
2.2) Gas train
The gas train consists of a removable burner tray
assembly. Basically, the gas train incorporates a
combination gas control (valve and pressure regulator),
and a complete ignition system including a pilot.
2.3) Draft hood
All models use an integral type draft-hood that must be
used without alteration.
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