Johnson Controls ENVIRO-TEC MQL B Series, Manual

Gasketing

The gasketing material is supplied with each module 

for sections that need to be assembled on the job site. 
Gasket the perimeter of each module. Overlap the 

gasketing approximately 1/8” when splicing. This will 

prevent air leakage between modules (see 

Figure 5 on 

page 11

).

LD14005

FIGURE 5 - 

GASKET APPLICATION

1/8 MIN.

GASKET

Mounting Actuator 

The Installing contractor takes all responsibility for the 

mounting of all field installed actuators. No require-

ments are made for the position of these actuators due 

to the number of options and arrangements available 

and the assortment of specific applications.
Attention should be taken to insure proper actuator 

support to prevent unnecessary stress in the linkage, 

cabinet, or damper shaft. Multiple damper assemblies 

must not be actuated from the shaft extension opposite 

the connection link.

Mixing Box

Fresh air and return air dampers can be connected to-

gether and driven from the same actuator if the damp-

ers are the same size. If the dampers are different sizes 

they must be driven by individual actuators and con-

trolled separately.

b.  Remove all shipped loose parts from job site 

to minimize theft. Tag and store parts in a 

safe place until needed.

c.  Cover entire equipment with protective tarp 

or moisture proof cover. Extend cover under 

equipment if stored on ground. Secure cover 

with adequate tie downs or store indoors. Be 

sure that all piping connections have protec-

tive shipping caps installed.

d.  Monthly - remove cover from unit, open fan 

access panel, remove belt ties and rotate fan 

and motor slowly by hand to redistribute the 

bearing grease and prevent bearing corro-

sion.

ASSEMBLING EQUIPMENT

All modules ship with the required bolts, nuts, screws 

and gasket material to assemble the equipment. Bolt/

screw holes are accessible through the inside of the up-

stream module (

Figure 3 on page 11,  Figure 4 on 

page 11

).

FIGURE 3 - 

ASSEMBLY, UNITS WITHOUT BASE 

RAILS

ATTACH CORNER

BRACKETS ON BOTH

MODULES WHEN

 POSSIBLE

LD14004

FIGURE 4 - 

ASSEMBLY, UNITS WITH BASE RAILS

JOHNSON CONTROLS

11

SECTION 1 - INTRODUCTION

FORM ET102.19-NOM1

ISSUE DATE:08/26/2013

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