Aerovent IM-500 - Manual (Page 8)

8 Aerovent IM-500
Operation Instructions
PRIOR TO OPERATION
Although this unit has been assembled and test fired at the
factory, the following pre-operational procedures should
be performed to assure the unit has not been damaged or
misaligned during shipment. This will help assure proper
on-site operation.
1. Remove all shipping straps, braces, and tie-downs.
2. Check burner to insure proper location and if airflow
is moving across burner correctly. The burner may be
wrapped, if so remove wrapping. This is important if
unit was split for shipping convenience. Also check to
be sure sections were caulked when assembled.
3. Check blower and motor sheave alignment, as well as
belt tension.
4. Check bearings for alignment and tightness of mounting
bolts, bolts securing taper lock bushings to shaft, and
that locking collars are secure.
5. Check all electrical connections to insure wires are mak-
ing good contact and are secure in their terminals. Check
tightness of jumpers between terminals.
6. Check gas piping for leaks using a soap/water solution.
After these preliminary checks have been made, the unit
can be prepared for start-up.
Start-Up and Check Out
Each unit is supplied with a service manual which includes
a Field Start-Up Form. The Field Start-Up Form must
be followed and properly filled out and signed by
the installer. It then is to be mailed or faxed back to
Aerovent, 800 S. High St, Covington OH 45318. The
fax number is (937) 473-3793.
Before continuing with the start-up and checkout proce-
dure, it is important to familiarize yourself with
the safety controls furnished with the unit.
Figure 2. Piping Configuration Airflow Proving Switch
(Aerovent Part #19240-01)
The airflow proving switch monitors the differential pres-
sure across the venturi sensor located at the burner profile
plate to insure that sufficient airflow exists before allowing
the burner to operate. The airflow proving switch is located
in the gas controls cabinet and is electrically interlocked
with the flame safeguard control system. The air flow
venturi is located at the burner profile plate with pressure
taps leading from that location to the pressure switch. The
venturi amplifies the signal to the pressure sensing device
and minimizes nuisance shutdowns.
High Temperature Limit Control
(Aerovent Part #18756-01E)
The high temperature limit control shuts down the burner
if excessive discharge temperatures are experienced. The
limit control is located in the blower discharge air chamber.
The limit control is electrically interlocked with the flame
safeguard control relay.
Figure 3.
Figure 4. High Temperature Limit