Bryant 342S - Manual (Page 3)

S E P / 0 9 / 2 0 0 8 / T U E 0 3 : 3 3 UTC TECH PUB F A X N o , 3 1 7 2 4 0 5 6 6 2
TABLE III—RATINGS AND SPECIFICATIONS—MODEL 342
Slzo
Equivalent
Sq Ft of
Steam
Radiation
Temp
Rise
’‘F
Total
Air
Delivery
CFM
Velocity
ft/mln
til
Effective Throw Mounting Haight
Fan
FIFM
Nominal
Motar
HP
Approx
Shipping
Weight
"’Ratings Btuh Distance from Floor to Top of Hoator
Input Output 8' 10' 12' 14' 16' 18' 20' 22' 24' 2B' 28'
30 30,OGO 24,000 100 Ф0 36Ы 5S5 16 13 1500 i/iM 65 "
50 50, O dd 40,boo 1Й7 60 600 5Ô5 30 28 25 22 iSOO 1/40 84
76 75,000 60,000 250 70 900 615 36 33 30 28 1500 1/30 117
100 100,000 50,000 333 60 1200 675 45 43 40 38 35 33 30 1050 1/15 139
125 125,000 100,000 417 60 1500 720 55 53 50 ' " 48 ■45 43 40 38 1050 1/10 164
150 150,000 .120,000 500 60 1800 750 60 58 55 53 50 48 45 43 40 1050 1/10 ^ 180
175 175,0(i0 140,000 5?3 60 21Ú0 850 65 63 60 58 55 53 50 48 45 , 1050 1/5 212
200 200,000 160,000 667 60 2400 865 70 60 65 63 60 58 55 53 50 1050 1/5 235
225 225,000 180,000 750 60 2700 860 70 68 65 63 60 58 55 53 50 1050 1/5 258
250 250,000 200,000 833 60 3000 B50 05 63 60 58 55 53 50 43 45 1025 1/5 317
300 300,000 240,000 1000 60 3600 900 75 73 70 68 65 63 60 58 55 53 50 1050 (2) 1/10 378
400 400,000 320,000 1334 60 480Ô 1000 90 88 85 83 80 78 75 73 70 68 65 1025 (2) j/5 560
^The above ratings are approved for altitudes to. 2000 ft. For elevations above 2000 ft, reduce ratings 4% for each 1000 ft above sea level.
=i=’i=Effective throw aa shown is the horizontal distance in feet that the heated airstream travels from the outlet of the unit heater with louvers
positioned for maximum throw with air reaching the floor, Spread or width of the air pattern is approximately 20% of the'maximum throw.
For additional spread, use vertical louvers, Above data are test results,
Specific Location and Suspension Precautions
For general location and suspension information, refer to
Section II of Bryant form No, 33008Dl. b addition, the
following precautions should bs observed when selecting a
; mounting site,
1. Direct heated airstream toward area having greatest
heat loss.
2. For multiple installations, locate heaters so that each
will warm a specific area. Arrange so that the overall
air pattern results in a continuous circular flow of
warm air throughout the space,
3. Do not locate the heater in areas where combustion air
is limited,
4. If located in spaces equipped with exhaust fans,
provide sufficient makeup air.
5. Two l/2"inch pipe tappings are provided in the top
casing for use in suspending the heater. Use pipe
unions to join the unit heater to the ceiling hangar,
6. Do not lift the heater by the motor mount, manifold, or
louvers. Use a rope sling whenever this is possible.
IV. WIRING.
Make all electrical connections in accordance with the
National Electric Code and any_locaI codes .that may apply.
The unit must be grounded electrically in accordance with
the National Electric Code and local codes governing such
installations. A permanent and uninterrupted or unbroken
,.,ground,.is.es3enti al-to-minimi®ing.peEso naLin,j m,y_iLan-eiec=_
trical fault should occur.
If aluminum conductors are to be used, the wire size selec­
ready for connections to a 116/60/1 power source. See
wiring diagram.
The heat anticipator on the thermostat should be set at 0.8
amps.
VI. STARTUP AND ADJUSTMENT
NOTE; Remove burner hold-down shipping bracket.
1. Start unit using procedure outlined on lighting instruc™
tion plate attached to heater.
2, Adjust pilot flame. Adjusting screw under screw cap on
pilot valve is used for this purpose,
For D4 controls, flame should be long enough for good
impingement on metal element of Bryant automatic
pilot. For D5 and D2 controls, flame should surround
thermocouple element of pilot and extend downward
to include 3/S to 1/2 inch of thermocouple. Flame
should never come in contact with any part of thermo­
couple lead wire.
To adjust pilot flame on units equipped with Model A-
G43 valve, adjustment screw is located in pilot outlet
portion of valve body. Remove capscrew, make
.... . .nsoe.gsai'y. .adjustment, and replace capscrew,......................
"^3-r“6heck"input. "Input-s'hduld"be checked'-at metev'to-rH'S'ka"“
sure that it corresponds with input shown on rating
plate attached to unit. See Bryant form No, 39003D1
for method.
ted must have a Current capacity not less than that of the
copper wire specified and must not create a voltage drop be­
tween the service panel and the unit in excess of 2% of the
unit rated voltage. As a minimum, aluminum wire must be
treated to prevent oxidation.
With electric power turned off, recheck all electrical con­
nections (both factory and field) for tightness. Be sure to
check power supply connections, especially if aluminum
conductors are used.
The unit heater is completely wired at the factory and is
4. Final Checkout. Move thermostat setting above and
below room temperature several times, pausing be-
—^tween..,each^-“on—-and—off-’-c-yclfc...to-njake-8ut.e-.that-
main burners ignite properly.
Attach low-voltage test light to electrical leads of
gaa valve. With thermostat set above room tem­
perature, close manual pilot valve. If light goes out
when pilot cools, pilot is functioning properly. Test
light should go out within 45 seconds after pilot gas
supply is turned off.
Check Operation of temperature limit control. Do this
by allowing burners to operate while fan is not running
to see that limit switch opens.
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