NVB Series
Parts Identification and Chase Installation
(Insulation methods shown are optional for cold climate, not a requirement for unit operation.)
Termination Cap
Storm Collar
Pan Flashing
Batt Insulation (cut out around firestop)
Draftstop
Firestop
Ceiling Level 
*Do not install header until unit is in place. See Page 8, "Mounting the Appliance."
Standoff
Surround
Nailing Flange
Electrical Access 
Screen
Grate
Firebox
Outside Air Cover Plate
FP597
Fig. 7 Parts identification and system installation.
Gas Line Installation
This appliance must be isolated from the gas supply piping system by closing its individual manual shut off valve during any pressure equal to or less than 1/2 psig (3.45 kPa).
The appliance and its individual shutoff valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 1/2 psig (3.45 kPa).
If gas piping from the source to the appliance location has not been accomplished, install the required pipe. Consult local plumbing code to assure proper pipe size.
The gas pipeline can be brought in through the right side of the appliance. A knockout is provided to al- low for the gas pipe installation and testing of any gas connection. It is most convenient to bring the gas line in from the right side, as this allows fan installation or removal without disconnecting the gas line.
NOTE: The gas line connection can be made with 3/8" copper tubing approved for propane or natural gas, 1/2" rigid pipe or an approved flex connector, then reduced to 3/8" to the appliance. Because some municipalities have some additional local codes, it is always best to consult your local authority.
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