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HP SU-2A manual

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Table of contents for the manual

  • Page 1

    1 Manual for : SU-2A Gas Burner 50,000 BTU/H to 250,0 00 BTU/H The burner shall be used only with NATURAL GAS or LP GA S as specified on the nam eplate. Warning: If the fol lowin g inst ructi ons are not fol lowed ex actly, a fire or explos ion may result, causi ng pro perty damage, person al injury or deat h. • Do not s tore or u se gaso line or[...]

  • Page 2

    2 Chart 1: Natural Gas and LP Firing Rate Burner Model Length of Flame Tube Min BTU/H Max BTU/H Primary Electri c Input Secondary Electri c Input Total Watts Total Amps Gas Conn. SU-2A 4 ¼” 50,000 250,000 120 V olt 60 Hz 1 Ph 24 Volts 150 Max 3 or less ½” - Control System: Fenwal Model 2466H936-111 with 15 Second Pr e-Purge and 60 Second Post[...]

  • Page 3

    3 CONVERTING OIL TO GAS Before attempting the g as conversion, check to insure the heating sy stem is properly sized for the total heating demand and the entire sy stem is in good operating condition, including the fire chamber and flue passage s. It is important to allow adequate clearance ar ound the appliance for servicing and proper operation o[...]

  • Page 4

    4 CHIMNEY REQUIREMENTS The chim ney shoul d ext end at least 3’ above a flat roof or the h ighest roof ri dge (see Fig. 2) and be free in a radius of 30’ of objects such as t ree limbs , other bu ildings, etc, which m ay cause a down draft. The chi mney should be li ned as requi red by the local Gas C ompany or local codes. Some u tilit ies req[...]

  • Page 5

    5 VENT PIPE AND DRAFT HOOD SIZ ES Refer to C hart 3 to properly size the flu e pipe. If the flue pi pe exceeds 10’ in l ength (includi ng elbows), u se the nex t larger diam eter flue pip e and draft ho od. If a draft regulator is required, any Canadian S tandards A ssociati on (CS A) or Underw riter’s Laboratory (UL) listed double s wing draft[...]

  • Page 6

    6 GAS SERVICE & PIPE CAPACITY Before connectin g the burner to the gas supp ly , insu re that the gas p ipes and s ervice meter are large enough to perm it the ad dition al load o f the gas burner (s ee Chart 4). Chart 4: Pipe Capa city Tabl e*( x 1,0 00 BTU’s) Nominal diameter of pip e in inches Pipe Length** ¾” 1” 1 ¼” 1 ½” 15’[...]

  • Page 7

    7 It is advisable to run a separat e gas line from the meter t o the gas burn er to avoi d pressure drops. R efer to the above Pi pe Capacit y table for th e correct siz es. ALL PIPING MUST CONFORM TO LO CAL CODES. Use black s teel pipe and mall eable fitti ngs ( do not use cast iron parts ) with a s uitable p ipe dope t hat is res istant t o liqu [...]

  • Page 8

    8 ORIFICE INSTALLATION All burn ers are equipp ed with an orifice set at the mi nimum firing rate (ex cept for O EM packaged units ). Drilli ng the orifice i ncreases the firi ng rate. To dri ll the o rifice, first open the union an d then u nscrew the o rifice from i nside th e union. Determin e the proper o rifice siz e for the desired firing rat[...]

  • Page 9

    9 ELECTRIC WIRING These gas burners are manufactured for use wi th 120 v olt, 60 cy cle, single-ph ase electric current. The install ation m ust com ply and be grounded in accord ance with t he Nation al Board of Fire Underwrit ers and Nati onal Elect ric Code A NSI/NFPA No. 7 0-1987 (o r the latest additi on). All appl icable local codes sho uld b[...]

  • Page 10

    10 Fig. 5 Wiring Diagram for Honeywell S89F SEQUENCE OF OP ERATIONS Honeywell S89F 1. Limits close. 2. Blower mot or starts as the 24 Volt tran sformer po wers the airflo w swit ch. 3. Power from the airflo w switch to the S 89F cont rol init iates 34 second pre-pu rge. 4. At the end of the pre-p urge, the spark i s energized fo r 4 seconds . At th[...]

  • Page 11

    11 LIGHTING INSTRUCTIONS To light the SU-2A Gas Bu rner 1. Set the thermost at to th e lowest temperature 2. The contro l knob o n the gas valve sho uld be i n the “OFF” positi on for at l east five m inutes. 3. Rotate t he control knob co unter- clockwise to the “ON ” positi on and set t he thermos tat to t he desired tem perature sett ing[...]

  • Page 12

    12 PICTURE 4: HEAD AND A IR ADJUSTMENT Head A ir When to adjust the Air The air shu tter is a m echanical s hutter. D o NOT ov er crank the air s hutter. General rule: if the CO 2 (Carbon D iox ide) is t oo low, then clos e the air sh utter. If the CO 2 is too high, then o pen the air shutt er. Note: Do NOT set the CO 2 higher tha n 9.8% for Natura[...]

  • Page 13

    13 Trouble sho oting: There are three factors to operate t he gas burner pro perly : 1. Electricity {(main P ower 120V /60 Hz /1 Ph )( secondary 24V)} 2. Gas flow (Incoming pres sure shou ld be 10” w .c. with proper gas line withou t pressure d rop during burner o peration). 3. Comb ustion air. Check th ese three item s properl y before proceedin[...]

  • Page 14

    14 ITE M PART PART # ITE M PART PART # 1 Blast Tube 11728410 16 Cover Plate - Air Regulation 11887001 2 Flange Gask et 10195-1 16A Cover Plate - Nozz le Line 11887301 3 Adjustable Flange 10195 17 Scale - Nozz le Line 11888101 4 Front piece - Housing 17A Scale - Air Regulation 11887801 5 Rear piece – Housing 18 24 Volt Transf orm er 2440VA 6 Fan W[...]

  • Page 15

    15 Maintenan ce Instruction s: TO BE FIXED/ATTACHED NEAR BURNER Once a year , a quali fied service agency needs to be con tracted for oth er than rout ine mainten ance. 1. The blow er motor i s the on ly movi ng part. It does not require lub rication, s ince the bal l bearings have been permanentl y lubricated . 2. The user sh ould do periodi c vis[...]

  • Page 16

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