Seeley MobileMAX Series, Conversion Manual

   MOBILEMAX ASSEMBLY MANUAL  

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13

ILL2768-A

Replace all covers when adjustments are complete.

PULLEY SHEAVE ADJUSTMENT

Pulley adjustment is made with the cooler switched off. 

Never attempt this adjustment with the cooler operating. 

To adjust the pulley the locking cap must be removed. 

Remove securing screw and cap from the pulley. The 

adjustable sheave of the pulley is now free to be adjusted 

by rotating it on it’s thread. Remove the drive belt.

OPERATING ADJUSTMENTS
Setting the Motor Current 

Important!

 The motor pulley and belt tension need to be 

adjusted to ensure that the motor is running at its rated 

capacity. If the current is set too low, the cooler will not 

perform to its optimum capacity, and the motor speed 

control may not work effectively. If the current is too high, 

the motor may cycle on its internal over-temperature 

safety cut-out. It is most important that the motor current 

is set correctly. 
Before setting the motor current please ensure that:
• 

The CPMD Electronics Module is fitted securely, and all 

leads have been plugged in correctly.

•  Windows and doors in rooms to be cooled are open 

sufficiently, and all pad frames except the ones on the 

motor side and pulley side are in place. 

1.  Run the motor at maximum speed by operating the 

cooler with the Switch Plate Control set to maximum 

fan speed, ventilation only. 

WARNING!

 Ensure that 

the pump is not running. 

2. 

Continue running the motor for 10 minutes (warms 

up the motor) before proceeding with the current 

measurement. During this period carry out general 

system checks including airflow, etc.

3.  Measure the motor current with the Seeley clamp 

meter (P/No: 118635) or suitable equivalent. Attach 

the clamp meter around one of the motor cables as 

shown below.  

Compare the measured to the rated current. If 

the measured current is less than, or greater than 

the rated current, the adjustable pulley should be 

altered accordingly. See heading “Pulley Sheave 

Adjustment”. 

The measured current should be 

equal to, or within half an amp below that of the 

motor rated current. It must never be more than 

the rated current.

LEGEND

A -  Fixed Sheave
B -  Grub Screw
C -  Adjustable Sheave

ILL1208-C

COMMISSIONING THE COOLER

To increase the blower speed and therefore increase 

the amps, the two halves of the pulley must be closer 

together, i.e. turn the adjustable sheave clockwise.
To decrease the blower speed and therefore decrease 

the motor amps, the two halves of the pulley must 

be further apart, i.e. turn the adjustable sheave anti-

clockwise.

BELT TENSION

Belt tension is important because if it is too tight you will 

get excessive belt and bearing wear. If it is too loose you 

will get belt slip with accompanying noise and loss of 

cooler performance. The belt tension should be adjusted 

so that the maximum deflection is 15mm-20mm.

(5/8 to 3/16”)

There are two adjusting bolts for adjusting belt tension. 

These are located on the motor mounting plate. To make 

the adjustment, loosen off the nuts on the two adjusting 

bolts on the motor mounting plate and tighten or slacken 

the belt tension. When the adjustment is correct, tighten 

the locking nuts again.

D -  Looking Cap
E -  Locking cap securing screw

LEGEND 

A -  

Motor 

B - 

15-20mm (5/8” - 13/16”) with moderate finger pressure

C -  

Blower housing 

D -  

Pulley 

E -  

Belt tension adjust bolts

ILL034-F

When an adjustment is made, replace the locking cap 

(secure with screw) and the belt then check the amps. 

Smaller adjustments should be made each time you 

approach the desired setting. See heading ‘Belt Tension’.