Specifications

3-1
JOHNSON CONTROLS
FORM 102.20-N1 (1109)
3
Rotating parts and electrical shock
hazards exist. Lock out and tag out
the fan motor(s) and heat power
disconnects before servicing. FOL-
LOW THE LATEST "LOCKOUT
TAGOUT" PROCEDURE. Failure
to follow proper safety precautions
may result in serious injury or death.
Refer to general safety guidelines and
safety symbols located at the front of
this Manual.
Always replace metal tab on access
doors that provide access to moving
parts. This mechanical protection
from moving parts is required by UL-
1995.
When internal safety catch is not used,
always replace metal tab on access
doors that provide access to pressur-
ized areas. This mechanical protection
is to prevent accidental release of ac-
cess doors under positive pressure.
Serious damage to the AHU and/or
system is eminent if the AHU is oper-
ated under any of the following condi-
tions:
• Wi t ho ut p ro p e r co n t r ol o f
dampers.
• With smoke dampers closed.
• During a fire alarm or smoke
purge test.
• Any airflow restriction greater
than normal.
• Fluctuating or incorrect voltage
power supply
While it is a common practice to oper-
ate the fan as soon as possible (air
movement during construction is al-
ways preferred by contractors) on the
job site, the incomplete ductwork and
missing diffuser grilles will greatly
reduce air resistance and will allow the
fan to operate beyond design param-
eters. This practice may result in water
carry over and ooding of the unit.
Also, the motor may over Amp and
become damaged.
Fan manufacturers describe the rota-
tion of the fan impeller as being
“clockwise” or “counterclockwise” for
centrifugal fans when viewing the
drive side (see AMCA Standard
2406).
If your unit has HEPA lters the lter
frames, lter bulkheads and lter seg-
ment panels are factory sealed and
must remain sealed for NO air by-
pass.
Never use silicone caulk/sealant or
caulk/sealant containing silicone in or
on any air handling equipment. [Only
exception is when provided (high tem-
perature) with gas heat venting].
3.0 STARTUP