johNSoN coNtroLS
3-4
ForM 102.20-N1 (1109)
Startup
See Fig. 3-4 for TEFC.
isolators
Check fan base isolators and thrust restraints for proper
adjustment.
1. Standard fan isolation consists of spring isolators
(
see Fig. 3-5
) mounted under the internal fan as
-
sembly.
2. For thrust restraint adjustment procedures, when
applied,
(see IOM Section 5.0)
.
3. Fig. 3-6 shows isolator with seismic snubber re-
straint option.
Fig. 3-5 – SPRing iSOlAtOR
Cap Screw
Adjusting Bolt
LDO9637
Preparing Fan isolators for Operation
1. After tie down bolts are removed from the inter-
nal fan assembly check blower/motor frame for
correct height and that the frame is level.
2. To adjust isolators (
see Fig. 3-5
): First loosen
cap screws on top of adjustment bolt. Then turn
adjusting bolt. Next, check operational height
and level of frame. Repeat this procedure until
operational height and frame is level. Finally,
tighten cap screws.
(See IOM Section 5, “Isolator
Adjustment” for additional instructions).
3. Verify the fan is aligned with unit discharge.
4. Re-adjust as necessary with isolators.
LDO9639
Fig. 3-4 – tEFC (tOtAllY EnClOSEd FAn COOlEd)
Fig. 3-6 – SEiSMiC SnuBBER
Cap Screw
Adjustment
Bolt
Spring Rail
Washer, Flt, 3/8"
ID x 7/8" OD
Washer, Flt., 3/8"
ID x 7/8" OD
End Rail
Grommet
Snubber,
Seismic
Nut Lock, Hex,
3/8"-16
(4) Nut Lock, Hex, 3/8"-16
Screw, Hex, 3/8-16" UNC-2A x 5"
(4) Screw, Hex, 3/8-16"
Iso Rail
Isolator
Spring
LDO9636
Summary of Contents for YORK SOLUTION LD09624
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