10
ESW4 Closed Circuit Coolers
External Motor Installation
(applicable to 8.5’ (2.6m) wide models only)
8.5’ (2.6m) Wide Models
1. Study Figure 15 before installing the motor base on the unit.
2. Insert the lifting device into “U” bolt
A
on motor base
B
.
3. Lift the motor base and insert the pivot pin
C
down into
hole
E
and pivot pin
F
into hole
D
.
4. Install washer and nut (do not overtighten) on pivot pins.
Install jam nut on pivot pin
C
.
5. Insert “J” bolts
G
into holes
H
. Install flat washers and
cotter pins. Place nuts and washers on threaded portion of
“J” bolts. These will be behind the motor base installed in
the next step.
6. Insert “J” bolts into holes
J
in the motor base. Install flat
washers, lock washer and nuts. Remove lifting device from
the “U” bolt on the motor base. Position motor base toward
casing of unit for belt installation.
7. Install Powerband belt
K
(Figure 15) around fan sheave
and motor sheave. Tighten belt by adjusting nuts on “J”
bolts. Do not over tighten the belts. The center of the belt
should deflect approximately 3/4” (19mm) with moderate
hand pressure.
8. Measure to see that the top and bottom of the motor base
are the same distance out from the casing of the unit. This
should ensure that the sheaves are properly aligned as
they have been pre-set at the factory.
9. As a final check, lay a straight edge from sheave to
sheave. There should be four point contact (See Figure
16). Adjust the position of the motor sheave as necessary.
10. To install Motor Guard
L
, match up hinges and install hinge
pins
M
(See Figure 16).
11. Close Motor Guard and install two (2) wing bolts
N
.
J
J
C
G
G
H
F
E
B
D
H
A
Figure 15
– External Motor Installation
N
K
M
L
N
Figure 16
– Motor Guard and Powerband Belt Installation
FAN SHEAVE
ADJUST POSITION
OF MOTOR SHEAVE
(only if necessary)
1
2
3
4
Figure 17
– Sheave Alignment Check
