Table of Contents
Advertisement
12.4 Electrical Connections – Supply Voltage
IMPORTANT NOTE: USE COPPER CONDUCTORS ONLY.
Knockouts are provided on the air handler top panel and
sides of the cabinet to allow for the entry of the supply volt-
age conductors, as shown in Figure 13. If the knockouts on
the cabinet sides are used for electrical conduit, an adapter
ring must be used in order to meet UL1995 safety require-
ments. An NEC or CEC approved strain relief is to be used at
this entry point. Some codes/municipalities require the sup-
ply wire to be enclosed in conduit. Consult your local codes.
12.4.1 Air Handler Only (Non-Heat Kit Models)
The power supply connects to the stripped black and red
wires contained in the air handler electrical compartment.
Attach the supply wires to the air handler conductors as
shown in the unit wiring diagram using appropriately sized
solderless connectors or other NEC or CEC approved means.
A ground lug is also provided in the electrical compartment.
The ground wire from the power supply must be connected
to this ground lug.
12.4.2 Air Handler - Non-Circuit Breaker Heat Kits
A terminal block is provided with the HKS kit to attach the
power supply and air handler connections. Follow the HKS
Installation Manual and wiring diagram for complete wir-
ing details.
12.4.3 Air Handler With Circuit Breaker Heat Kit
The air handler has a soft plastic cover on the upper ac-
cess panel and can be removed to allow the heater kit
circuit breaker to be installed. The circuit breakers have
lugs for power supply connection. See the HKS Installation
Instructions for further details.
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 plastic breaker cover is sitting flush on the
blower access panel 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 pres-
sure 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 breaker 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
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 appli-
cation, gasket must be positioned at prescribed locations
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 damage.
•
Return air is not obtained from, nor are there any return air
duct joints that are unsealed in, areas where there may be
objectionable odors, flammable vapors or products of com-
bustion 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.
12
Side of
Cabinet
Figure 13
Hide quick links:
Advertisement
Table of Contents
Troubleshooting
