Table of Contents
Advertisement
13 Achieving 1.4% and 2.0% Airflow Low
Leakage Rate
Ensure all the gaskets remain intact on all surfaces as
shipped with the unit. These surfaces are areas between
the upper tie plate and coil access panel, blower access
and coil access panels, and between the coil access and
filter access panels. Ensure upon installation, that the plas-
tic breaker cover is sitting flush on the blower access pan-
el and all access panels are flush with each other and the
cabinet. With these requirements satisfied, the unit achieves
less than 1.4% airflow leakage @ 0.5 inch wc static pressure
and less than 2% airflow leakage @ 1inch wc static pressure
when tested in accordance with ASHRAE Standard 193.
IMPORTANT:
After installing the heater kits, it is very
important to seal the gap between the circuit break-
er and the cover.
Putty paste or gasket can be used
to seal the gap so that air leakage can be minimized.
Top of
Cabinet
KNOCK-OUT FOR ELECTRICAL CONNECTIONS
FIGURE 14
14 Miscellaneous Start-Up Checklist
•
Prior to start-up, ensure that all electrical wires are prop-
erly sized and all connections are properly tightened.
•
All panels must be in place and secured. For Air Tight
application, gasket must be positioned at prescribed lo-
cations to achieve 2% leakage.
•
Tubing must be leak free.
•
Condensate line must be trapped and pitched to allow
for drainage.
•
Auxiliary drain is installed when necessary and pitched
to allow for drainage.
•
Low voltage wiring is properly connected.
•
Unit is protected from vehicular or other physical dam-
age.
•
Return air is not obtained from, nor are there any re-
turn air duct joints that are unsealed in, areas where
there may be objectionable odors, flammable vapors or
products of combustion such as carbon monoxide (CO),
which may cause serious personal injury or death.
IMPORTANT NOTE: If thumb screws are used to access
the filter, ensure the washer installed on the screw behind
the access panel remains in place after re-installation.
NOTE: A removable plug connector is provided with the
control to make thermostat wire connections. This plug
may be removed, wire connections made to the plug, and
replaced. It is strongly recommended that you do not
connect multiple wires into a single terminal. Wire nuts are
recommended to ensure one wire is used for each terminal.
Failure to do so may result in intermittent operation.
14.1 Circulator Blower
This air handler is equipped with a variable speed cir-
culator blower. This blower provides several automati-
cally-adjusted blower speeds. The Specification Sheet
applicable to your model provides an airflow table,
showing the relationship between airflow (CFM) and ex-
ternal static pressure (E.S.P.).
14.2 AVPEC Motor Orientation
Side of
Cabinet
If the unit is in the upflow position, there is no need to
rotate the motor. If the unit is in the downflow position,
loosen motor mount and rotate motor as shown in the
AVPEC Motor Orientation Figure 16. Be sure motor
is oriented with the female connections on the casing
down. If the motor is not oriented with the connections
down, water could collect in the motor and may cause
premature failure.
15 Troubleshooting
15.1 Electrostatic Discharge (ESD) Precautions
NOTE: Discharge body's static electricity before touch-
ing unit. An electrostatic discharge can adversely affect
electrical components.
Use the following precautions during air handler installa-
tion and servicing to protect the integrated control mod-
ule from damage. By putting the air handler, the control,
and the person at the same electrostatic potential, these
steps will help avoid exposing the integrated control
module to electrostatic discharge. This procedure is ap-
plicable to both installed and uninstalled (ungrounded)
blowers.
1. Disconnect all power to the blower. Do not touch the
12
integrated control module or any wire connected to
the control prior to discharging your body's electro-
static charge to ground.
Hide quick links:
Advertisement
Table of Contents
Troubleshooting
