Installation manual

9
VII. HEATER INSTALLATION
PROCEDURE
When separate technicians perform these
installations, please leave this manual for the next
technician to perform their installation. When the
final start-up is completed, you must return the
Warranty form to activate the warranty.
Service Department
117 Franklin Park Ave
Youngsville, NC 27596
919-554-4605 Fax
It is imperative that this unit is operated with the
designed airflow, electrical and gas supply in
accordance with the following installation sections.
If there are any questions about any items, please
call the service department at 1-800-334-9256
before performing them.
Mechanical Installation
The following tools are necessary for installation
and start-up:
Manometer
Volt/Ohm Meter
Amp Meter
Tachometer
Thermometer
Standard Hand Tools
The label for this unit specifies the tested CFM and
static pressure. For the gas and electrical
components to function properly it is important that
the unit produce the designed airflow. The
ductwork attached to this unit will significantly
affect the airflow performance. DO NOT use
flexible ductwork, square turns, and plenum boxes.
These will increase the static pressure and reduce
airflow. Carefully raise the unit to its installation
point. The unit should be installed on a curb and/or
rail elevated not less than 14” above any surface.
Make sure the unit is mounted level, and all
attachments are properly sealed with silicone
caulking. If there is a motorized damper make sure
any wires are routed for the job site electrician.
Plumbing Installation
This unit is designed for a constant 7” W.C. Natural
gas supply, (LP should be 11”) when the unit is in high
fire. If the gas supply exceeds 14” W.C. it will damage
the internal components and if it is below 7” W.C. it
may not perform to specifications. Insure that all
connections are well sealed, and the factory supplied
external ball valve is installed to shut down the gas
supply. The incoming pipe should be sized to match
the connections on the outside of the unit. Avoid
multiple taps in the gas supply so the unit has a steady
supply of gas at all times. Blow out the gas line to
remove debris before making connections. Purge line
to remove air before attempting to start unit.
Pipe sizes are listed below:
Electrical Installation
This unit uses two separate circuits. The controls are
run from a dedicated 120V circuit. The 120V circuit
only requires 5 Amps of service, however, a dedicated
20 Amp service is recommended. The motor circuit
should be supplied by a dedicated branch circuit with
short circuit protection according to the National
Electric Code. Two flexible conduits are provided
exiting the floor of the unit inside the curb. One
contains the motor circuit wires and the other the
control circuit wires. Refer to the performance label for
incoming power requirements. Make sure the interior
NOTICE!
Refer to the heater rating plate for
determining the minimum gas supply pressure
for obtaining the maximum gas capacity for
which this
heater is specified.
CAUTION!
This heater requires at least 4 CFM
outside air per 1,000 BTU per hour. For details
and recirculation application limitations, see
manufacturers instructions.
Model Pipe Size (NPT)
#1
3
4
“
#2 1”
#3 1”
#4 1
1
4
”
#5 1
1
4
”