Bard Bayrd Furnace 403293A - Manual (Page 27)

NOTE: Bottom and side filter cabinets available from
manufacturer have a 1 inch space between furnace
casing and filter for increased filter area. Placing fitter
(field-supplied) directly against furnace bottom or side
will decrease airflow and adversely affect furnace
operation. Allow 1 inch clearance from furnace filter
(field-suf^tied) to furnace.
2. Horizontal Position.
Horizontal position should use an appropriately sized and
installed return air filter grille or duct work air fitter.
3. Downflow Position.
Downflow position furnaces use (2) 16 x 20 filters.
For downflow position, install filter support in return air
plenum Of use return air filter grille. Downflow filter sup­
port and filter kit is available from manufacturer.
DOWNFLOW FILTER ARRANGEMENT
FIGURE 31
To inspect, replace or clean air filters, follow Users' Informa­
tion Manual instructions.
SECTION 18 CHECKS BEFORE STARTING
FURNACE.
Before starting furnace for the first time, be sure you can
answer "Yes” to each of these questions:
1. Is furnace properly equipped to operate with available
fuel? See Section 2.
2. Is furnace level? See Section 4.
3. Have you cleared away all loose construction and insu­
lation materials? See Section 6.
4. Is furnace installed with proper clearances to combus­
tible materials? See Section 6.
5. И furnace is in crawl space, is it sufficiently elevated
above the ground? See section 6.
6. Does furnace have sufficient combustion and ventilation
air? See Section 8.
7. Does vent system meet current National Fuel Gas Code
ANSI Z223.1/NFPA 54 and local codes? See Section 9.
8. Is vent connection securely fastened to draft inducer
collar? See Section 9.
9. Did you completely check gas pipe and controls for gas
leaks? See Section 11.
10. Does electrical wiring follow current National Electrical
Code ANSl/NFPA 70 as well as local codes? See Section
12 .
11. Is furnace electrically grounded? See Section 12.
12. Is room thermostat properly installed and heat anticipa­
tor set correctly? See Section 14.
13. Is duct work system correctly sized and sealed? See
Section 16.
14. Are air filters in place and correctly sized? See Section
17.
15. Are proper fitter frames or fitter supports installed? See
Section 17.
16. On furnace installations above a 2000-foot elevation, Is
furnace derated properly? See Section 23.
SECTION 18 ^ ADJUSTING PILOT.
Equipment needed: Save time by getting these tools before
you start: item number(s) 9,10,14,15,19 and 23 listed in Sec­
tion 10.
NOTE; To purge gas lines, it may be necessary to operate
furnace through more than one lockout cycle at start-up.
WARNINGS You must have correct gas supply line and
pilot gas pressures. Correct pressures give proper pilot
Ignition and burner operation. Use e "U" tube water ma>
nometer to measure actual gas pressure. Failure to accu­
rately adjust pressure could cause a fire or explosion
resulting in damage, injury or death.
A. Gas supply line pressure.
1. Turn off gas at manual shut-off valve in gas supply
line just ahead of furnace.
2. Remove inlet pressure plug from gas control.
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