01/04
35593 Rev G
19
CALIBER DESIGNER DIRECT VENT
F. UTILITIES
1. High Altitude Installation
For U.S. installation, appliances are tested and approved for elevations from 0-2000 feet. When installing this
appliance at an elevation above 2000 feet, National Fuel Gas Codes require a decrease of the input rating by
changing the existing burner orifice to a smaller size. Input should be reduced 4% for each 1000 feet above sea
level. Check with the local gas utility for proper orifice size identification. The correct orifice is available from your
Heatilator distributor.
For Canada, appliances are certified for elevations from 0-4500 feet. When installing this appliance at an elevation
between 0-4500 feet in Canada, the input rating does not need to be reduced. When installing this appliance at an
elevation above 4500 feet in Canada, check with local authorities.
2. Gas Line Connection
Open the control access panel as shown in Figures 34-35. The appliance is provided with a stainless steel flexible
connector and a listed (Commonwealth of Massachusetts approved) T-handle manual shutoff valve. The incoming
gas line should be piped into the valve compartment and connected to the ½ FIP connection provided on the manual
shutoff valve. See Figures 36-37 to connect the gas line.
Optional:
Seal around the gas line to prevent cold air
leakage.
All connections must be tightened and checked for leaks with a commercially available, non-corrosive leak check
solution. Be sure to rinse off the solution when done leak testing.
Bleed the gas line to extract any air that may have been trapped inside the pipe.
Figure 34 - Opening the Control Access Panel
Figure 35 - Spring Latch
Note:
This appliance and its manual 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 psi (3.5 kPa). The appliance must be isolated from the
gas supply piping system by closing its manual shutoff valve during any pressure testing of the gas supply piping
system at test pressures equal to or less than 1/2 psi (3.5 kPa).
Figure 36 - Gas Line
Figure 37 - Chesapeake Gas Line Location
Note:
Have the gas supply line installed in accordance with building codes by a qualified installer approved and/or
licensed as required by the locality. In the Commonwealth of Massachusetts, installation must be performed by a licensed
plumber or gas fitter.
Æ