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SECTION 4
Engineering Specifications
The total heating system supplied shall be design certified by CSA
under the latest revision of ANSI Z83.20 and CSA 2.34.
A. Burner & Burner Controls
1. Burners shall be capable of firing with one of the fuel options as
specified on the purchase documents: Natural Gas or LP.
2. Burners shall be supplied to fire at any one of the input rates as
specified.
ER2STG 60 - 100
ER2STG 80 - 125
ER2STG 125 -175
3. Burner shall be equipped with a direct sense silicon-carbide hot
surface ignition control system with 100% shut-off ignition device.
Power supplied to each heater shall be 120V, 60Hz, single phase.
Burners shall be rated for 1.0 Amp (run) and 5.0 Amp (start.)
4. Burner shall be equipped with thermal overload motor protec-
tion, balanced air rotor, combustion air proving safety pressure
switch, and viewing window for flame observation.
5. When specified, in contaminated environments, the burner shall
be capable of supplying outside air to each burner for the sup-
port of combustion.
6. All burners shall be pre-wired with a grounded electrical
cord and plug.
7. Low voltage 2-stage thermostat required for correct 2-stage
burner operation.
B. Heat Exchanger
1. Radiant tubing shall be 4" diameter aluminized steel supplied in
10 ft. sections. Sections shall be joined with stainless steel wrap-
around couplings.
2. Reflector to be of aluminum material and designed to direct all
radiant output below horizontal center line of radiant tube.
3. Heaters shall be vented according to manufacturer's
recommendations.
60,000 - 100,000 BTU/Hr.
80,000 - 125,000 BTU/Hr.
125,000 -175, 000 BTU/Hr.
Enerco | Heatstar ER2STG Tube Series Heater
Gas pressure at MANIFOLD:
MANIFOLD PRESSURE
ER2STG 60-100
NATURAL GAS - INCHES
W.C.
PROPANE - INCHES W.C.
MANIFOLD PRESSURE
ER2STG 80-125
NATURAL GAS - INCHES
W.C.
PROPANE - INCHES W.C.
MANIFOLD PRESSURE
ER2STG 125-175
NATURAL GAS - INCHES
W.C.
PROPANE - INCHES W.C.
1/2" NPT Gas Connector Size
Gas INLET pressure:
Natural Gas:
4.6" W.C. Min
11.0" W.C. Max
LP Gas:
11.0" W.C. Min
14.0" W.C. Max
1/2" NPT Gas Connector Size
Electrical Rating: (All Models)
120V - 60Hz
1.0 AMP (Run) 5.0 AMP (Start)
Dimensions:
Flue Connection Size.....................4"
Outside Air Connection Size.........4"
12
Operating Instructions and Owner's Manual
LOW FIRE
HIGH FIRE
( MIN. RATE)
(MAX RATE)
1.3"
3.5"
3.5"
10.5"
LOW FIRE
HIGH FIRE
( MIN. RATE)
(MAX RATE)
1.7"
3.5"
4.2"
10.5"
LOW FIRE
HIGH FIRE
( MIN. RATE)
(MAX RATE)
2.2"
3.5"
5.8"
10.5"
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