Carrier 39B - Manual (Page 13)

5. Fasten flange 4 to matching flange of applicable
accessory (except bypass heat section arranged
for bypass cooling only) with seven 1/4-20
X 1/2-in. self-tapping screws and locknuts.
6. Fasten flange 4 to matching flange of bypass
heat section arranged for bypass coohng only
as follows:
a. Line up flange 4 with matching flange of
accessory.
b. Drill seven engagement holes in matching
flange with a no. 3 drill.
c. Fasten flange 4 to matching flange with
seven 1/4-20 x 1/2-in. self-tapping screws.
7. Fasten flange 5 to matching flange of appli­
cable accessory or cooHng coil section with
seven 3/8-16 x 3/4-in. hex head cap screws and
matching flange weld nuts.
8. Fasten flange 6 to matching flange of applicable
accessory with seven 3/8-16 x 3/4-in. hex head
cap screws and matching flange weld nuts.
9. Fasten flange 6 to matching flange of coohng
coil section with seven 1/4-20 x 1/2-in. self­
tapping screws and matching flange engage­
ment holes.
10. Fasten flanges 7 to matching flanges of appli­
cable accessory with two 1/4-20 x 1/2-in. self­
tapping screws per two flanges and matching
flange engagement holes (bypass duct) or lock­
nuts (duct extension or bypass heat section).
11. Fasten flanges 8 to matching flanges of appli­
cable accessory or coohng coil section with
five 3/8-16 X 3/4-in. hex head cap screws and
hex nuts per two flanges.
12. Tighten all screws securely.
13. Replace coil in preheat section.
FACE AND BYPASS DAMPER SECTION
(Size 130 thru 140) - Refer to Eig. 10.
1. FoUow preceding steps 1 and 3.
2. Fasten flange 1 to matching flange of apphcable
accessory (except bypass heat section arranged
for bypass cooling only) with seven 1/4-20
X 1/2-in. self-tapping screws and locknuts.
3. Fasten flange 1 to matching flange of bypass
heat section arranged for bypass coohng only
as follows:
a. Line up flange 1 with matching flange of
accessory bypass heat section.
b. Drill seven engagement holes in matching
flange with a no. 3 drill.
c. Fasten flange 1 to matching flange with
seven 1/4-20 x 1/2-in. self-tapping screws.
4. Fasten flange 2 to matching flange of apph­
cable accessory or coohng coil section (preheat
coil section; sizes 135 and 140 excluded) with
seven 3/8-16 x 1-in. hex head cap screws per
flange and matching flange weld nuts.
5. Fasten flange 2 to matching flange of preheat
coil section (sizes 135 and 140) as follows:
a. Line up flange 2 with matching flange of
preheat coil section.
b. Follow preceding steps 3b and 3c (sub­
stitute flange 2 for flange 1 in step 3 c).
6. Fasten flange 3 to matching flange of apphcable
accessory or coohng coil section (preheat coil
and cooling coil sections, sizes 135 and 140
excluded) with seven 3/8-16 x 1-in. hex head
cap screws and matching flange weld nuts.
7. Fasten flange 3 to matching flange of preheat
coil section (sizes 135 and 140) with seven
3/8-16 X 1-in. hex head cap screws and hex nuts.
8. Fasten flange 3 to matching flange of coohng
coil section (sizes 135 and 140) with seven
1/4-20 X 1/2-in. self-tapping screws and match­
ing flange engagement holes.
9. Fasten flanges 4 to matching flanges of apph­
cable accessory (bypass duct excluded) with
two 1/4-20 X 1/2-in. self-tapping screws and
locknuts per flange.
10. Fasten flange 4 to matching flanges of accessory
bypass duct with two 1/4-20 x 1/2-in. self­
tapping screws and matching flange engagement
holes.
11. Fasten flanges 5 to matching flanges of apph­
cable accessory or coohng coil section with:
five (accessory or coohng coil section —
size
130); five (accessory section —
sizes 135 and 140); six (coohng coil section —
sizes 135 and 140) 3/8-16 x 1-in. hex head cap
screws and hex nuts per two flanges.
12. Tighten all screws securely.
13. When face and bypass damper section is used
with accessory humidifier, minimum stops
may be required to ensure air flow thru
humidifier at all times. Install stops on damper
actuator hnkage as opposed to directly on
damper blades to prevent possible damage.
Fig. 10 — Assembly of Accessory Face and Bypass
Damper Section — (Sizes 130-140)
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