Boiler Guide

Note
Note
Number
Footnotes
5
1 “FS” on air tube combination = fiber heat shield on combustion head.
2 “HS” on air tube combination = ceramic heat shield on combustion head.
3 Pre/post-purge control must be used.
4 Requires delay solenoid valve.
5 Non-delay valve required.
6 Nozzle line heater required.
7 D1 head requires 7/8” “Z” dimension.
8 2-slot air band 31840BK required.
9 Electrode settings of 1/4” above center of nozzle, 1/8” in front of nozzle and gap 5/32”.
10 3-slot air shutter #32211.
11 Refer to appliance name plate for proper (nozzle) input rate.
12 Massachusetts approved dual boiler temperature controls.
13 Requires blank air band.
14 Requires flange gasket #31653.
15 Must maintain 6° downward pitch on air tube/flange.
16 With conic shroud, “Z” dimension is 1-3/4”.
17 Flange 3837BKU. (Gasket supplied by Nordyne)
18 Model ST burner 220V/50Hz.
19 Requires gasket #31802.
20 Stainless steel combustion chamber.
21 5-slot shutter #3932BK.
22 This application requires the use of a blank air band, part #3626.
23 R4 Head has a 1” “Z” dimension.
24 Burner must be factory assembled complete with dual boiler temperature controls.
25 Burner equipped with #31581 refractory sleeve.
26 Burner requires Part Number 21295 four-second timer and solenoid valve.
27 Requires stainless steel air tube.
28 For positive pressure wall venting applications.
29 For chimney vented applications.
30 Two SF burners Utilized.
31 The (H) in the nozzle description denotes a Hago.
32 The (D) in the nozzle description denotes a Delavan Del-o-flow nozzle.
33 Specified with 2-stage pump.
34 Must maintain 3° downward pitch on air tube/flange.
35 Alternate specs for 3-section boiler.
36 Series 3 boiler.
37 AQ in ATC designates 16-slot venturi.
38 Alternate nozzles are Hago 70 B or Monarch 70 B.
39 The AB in the nozzle description denotes a Danfoss.
40 Must maintain 0° downward pitch on air tube/flange.