Model 301GAS burner — Instruction manual
Carlin part number MN301GAS Rev. 11/24/14
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Where appliance instructions differ from this manual, follow the appliance instructions.
301GAS burner at-a-glance
1 Manual gas valve (wtih two test tappings) –Gas supply entrance — 1” NPT;
5” w.c. min; 14” w.c. max; natural gas or propane
2 Gas pressure regulator
3 Gas pressure regulator vent port (vent to outside where required by applicable
codes)
4 Low gas pressure switch
5 Automatic gas valve
6 Junction box with terminal strip
7 Automatic gas valve (diaphragm type)
8 Diaphragm gas valve bleed port (can be fitted with fixed bleed orifice) –
installer must provide vent piping from this tapping to outside
9 High gas pressure switch
10 Manual gas valve
10a Burner gas manifold pressure test port, 1/4” NPT
11 Union
12 Orifice nipple (burner gas orifice plug located inside)
13 Burner gas connection, 1” NPT
14 Air tube (flange omitted for clarity), with powder coat paint finish
15 Flame rod/insulator assembly
16 Combustion head
17 Gas saddle connection gasket
18 Gas manifold
19 Ignition electrode/insulator assembly
20 Static disk assembly (low input range shown)
21 Hinged burner flange door – for access and removal of combustion head/
gas manifold assembly
22 Ignitor (Carlin Model 41800 solid state electronic ignitor — 9,000 volts,
continuous duty rated)
23 Hinged cover plate (for access to blower wheel & electrodes)
24 Airflow proving switch — Prevents burner from firing if air is not moving
25 Air band — Only a single adjustment required for setting combustion air; see
page 7 for starting setting based on input
26 Door interlock switch — prevents burner operation if flanged door is open
27 Primary control — Carlin Model 60200FR microprocessor-based interrupted
ignition flame supervisory control (flame rectification); Flame current test jack
is located to right of control terminal strip
28 Burner junction box (installer electrical entrance)
29 Motor (with permanently-lubricated bearings and thermal overload protection)
