RT-SVX072A-EN
35
NNootteess::
• Fan assemblies not equipped with rubber
or spring isolators have mounting bolts at
the same locations and must not be
removed .
• If return fan backside spring isolator
repair/replacement is required, access the
backside of the return fan by entering the
unit filter section. Remove the top pivot
bearings from the three fixed- position
return damper blades (bolted together as
a single section with an angle brace). Lift
the three-blade section as a single unit
from the return damper assembly and set
aside or lean in against the return fan
frame. Then enter the return fan
compartment from the filter section to
perform service work on the rear isolators.
Optional DDP Supply Fan
Shipping Channel Removal and
Isolator Spring Adjustment
Shipping Tie Down and Isolator Spring
Adjustment
Remove shipping tie down bolt and washer (4—20 to
30 ton, 6—40 to 55 ton, 8—60 to 75 ton). LLeeaavvee
sshhiippppiinngg cchhaannnneellss iinn ppllaaccee.. Verify spring height is
0.1" to 0.2" above shipping channel. Spring height is
factory set but verify and adjust as needed as follows:
1. Back off ALL spring isolator jam nuts (4) at top of
assembly (adjusting one spring effects all others)
2. Turn adjustment bolt (make small adjustments;
again each change effects all other springs.
Clockwise raises; counter clockwise lowers).
3. When correctly adjusted re-tighten jam nuts and
rreemmoovvee sshhiippppiinngg cchhaannnneellss.. DDoo NNOOTT rreemmoovvee
eelleeccttrriiccaall ggrroouunndd wwiirree ssttrraapp bbeettwweeeenn iissoollaattiioonn
bbaassee aanndd uunniitt bbaassee..
IInnssttaallllaattiioonn
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