858539-YUM-A-0512
6
Unitary Products Group
TROUBLESHOOTING
BEFORE CALLING A SERVICE-
PERSON:
A.
Check thermostat setting and
insure thermostat is calling for heat
or cooling.
B. Check thermostat for lint, dust,
etc.
C. Check fuses or circuit break-
ers.
D. Check filters for excessive dust
accumulation and/or restric-
tion.
REPLACEMENT PARTS
Contact your local York parts distri-
bution center for authorized replace-
ment parts.
SOME EFFICIENCY DO'S
AND DON'TS
DON'T heat or cool unused areas.
Reduce supply and return air flow
to a minimum in areas which are
not living spaces (storage rooms,
garaged, basements, etc.).
DON'T be a “thermostat jiggler”.
Moving your thermostat setting will
not make your system heat or cool
any faster. Adjust your thermostat
to a comfortable setting and leave it
there.
DON'T restrict air circulation. Plac-
ing furniture, rugs, etc. in such a
way that they interfere with air
vents will make your system work
harder to achieve a comfortable
temperature level. This requires
more energy, which means greater
cost to you.
DON'T heat or cool when you are
away. If you are going to be away
for a day or more, re-adjust your
thermostat accordingly. Your furni-
ture is far less demanding than you
are when it comes to comfort lev-
els. However, don't expect the sys-
tem to restore comfort conditions
immediately upon returning home.
It will take a little time.
DON'T locate lamps or other heat-
producing appliances (radios, TV's,
heaters, etc.) near your thermostat.
The heat from these items will give
your thermostat “false information”
about the temperature in the room.
DO select a comfortable thermostat
setting, but keep in mind that mod-
eration in temperature selection will
save energy.
DO turn on your kitchen exhaust
fan when cooking and your bath-
room exhaust fan when showering.
Also, make sure your clothes dryer
is properly vented. If these items
are neglected, an excess heat and
humidity condition may be created,
causing your air conditioning sys-
tem to run longer.
DO set your thermostat a few
degrees lower than normal several
hours before entertaining a large
group of people in a relatively small
area. People give off a consider-
able amount of heat and moisture
in a closed area.
DO keep drapes and Venetian
blinds closed when practical.
These items provide insulation
against heat loss/gain.
DO contact a qualified service per-
son to make repairs or adjustments
to your system. They have been
trained to perform this service.
TABLE 1: GAS RATE - CUBIC
FEET PER HOUR
1
1.
EXAMPLE: By actual measurement, it
takes 38 seconds for the hand on the 1-
cubic foot dial to make a revolution with
just a 100,000 BTUH furnace running.
Using this information, locate 28 sec-
onds in the first column of the table.
Read across to the column headed “1
Cubic Foot,” where you will see that 95
cubic feet of gas per hour are consumed
by the gas heat section at that rate. Mul-
tiply 95 x 1050 (the BTU rating of the
gas obtained from the local gas com-
pany). The result is 99,750 BTUH which
is close to the 100,000 BTUH rating of
the equipment.
SECONDS
FOR ONE
SIZE OF TEST DIAL
REV.
1/2 CU. FT.
1 CU. FT.
10
180
360
12
150
300
14
129
257
16
113
225
18
100
200
20
80
180
22
82
164
24
75
150
26
69
138
28
64
129
30
60
120
32
56
113
34
53
106
36
50
100
38
47
95
40
45
90
42
43
86
44
41
82
46
39
78
48
37
75
50
36
72
52
35
69
54
34
67
56
32
64
58
31
62
60
30
60
