Model IGX Make-Up Air
24
®
2. Connect the Supply & Return Lines
Connect the supply and return lines as shown.
3. Check the System for Leaks
Pressurize the system to 100 psig. Leave the system
pressurized for a minimum of 10 minutes. If the system
holds pressure, it can be considered leak free. If the
pressure drops by 5 psig or less, re-pressurize the
system and wait another 10 minutes. If the pressure
drops again, there is likely one or more small leaks
which must be located and repaired. Pressure losses
greater than 5 psig indicate a large leak that must be
isolated and repaired.
4. Install the Drain Line
Connect an unobstructed drain line to the drain pan. A
trap must be provided for proper unit drainage.
All traps must be
installed below
the roof line or be
otherwise protected
from freezing.
Installation
Piping
Optional Chilled Water Coil
1. Verify Coil Hand Designation
Check the coil hand
designation to ensure that
it matches the system.
Coils are generally plumbed
with the supply connection
located on the bottom of the
leaving air-side of the coil
and the return connection
at the top of the entering air-side of the coil. This
arrangement provides a counter flow heat exchanger
and positive coil drainage.
Return
Connection
Cold Supply
Connection
Entering
Air
Leaving
Air
Guidelines for the installation of chilled water cooling
coils have been provided to ensure proper performance
and longevity of the coils. These are general guidelines
that may have to be tailored to meet the requirements of
a specific installation. Qualified personnel must perform
the installation and maintenance of any coil. Proper
protective equipment is recommended during the
installation and maintenance of the coil.
When installing couplings, do not apply undue stress
to the connection. Use a backup pipe wrench to avoid
breaking the weld between the coil connection and
the header.
All field-piping must be self-supporting. System
piping must be flexible enough to allow for the thermal
expansion and contraction of the coil and piping.
6 in./min. (0.254 cm/sec)
6 in./min. (0.254 cm/sec)
Drain
Trap
