21
Gas Line Installation
This gas appliance should be installed by a qualified installer in accordance with local building codes and with current
CAN/CGA - B149.1 installation codes for Gas Burning appliances and equipment in Canada and the National Fuel Gas
Code ANSI Z223 in the U.S.A.
State of Massachusetts
For the state of Massachusetts a T-handle gas shut-off valve must be used on a gas appliance. This T-handle gas shut-off
valve must be listed and approved by the state of Massachusetts. This is in reference to the state of Massachusetts state
code CMR238.
1. The gas pipeline can be brought in through either the right or left side of
the appliance. Knockouts are provided at these locations to allow for the
gas pipe installation and testing of any gas connection.
2. The gas control inlet is 3/8” NPT. Typical installation layout for rigid pipe
is shown at right.
3. When using copper or flex connector, use only approved fittings. Always
provide a union so that gas line can be easily disconnected for burner or
fan servicing. See gas specification for pressure details and ratings.
4. When a vertical section of gas pipe is required for the installation, a
condensation trap is needed. See CAN/CGA-B149.1 for code details.
5. For natural gas, a minimum of 3/8” iron pipe with gas minimum pressure of 5.5” w.c. must be used for supply from the
gas meter. Consult with the local gas utility if any questions arise concerning pipe sizes.
6. Ports are accessible for test gauge connection both on the inlet and outlet of the gas valve.
7. Turn the gas supply ON and check for leaks. DO NOT USE OPEN FLAME FOR THIS PURPOSE. Use an approved
leak testing solution.
8. 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 1/2psig [3.5 KPa].
9. The appliance must be isolated from the gas supply piping system by closing its individual shutoff valve during any
pressure testing of the gas supply piping system at test pressures equal to or less than 1/2psig [3.5 KPa].
Note: The gas line connection may be made of 1/2” rigid pipe, 1/2” copper pipe or an approved flex connector. Since
some municipalities have additional local codes, it is always best to consult your local authorities and the current
CAN/CGA - B149.1 installation code in Canada or the National Fuel Gas code ANSI Z223.1 in the U.S.A.
IMPORTANT: Check for gas leaks with a soap and water solution. DO NOT USE OPEN FLAME FOR LEAK TESTING.
Models
IDV33N
IDV33LP
IDV36N
IDV36LP
Fuel
Natural Gas
Propane
Natural Gas
Propane
Gas Control
Millivolt Adjustable
Maximum Input [BTU]
31,000HI / 20,900LO
28,500HI / 23,100LO
34,250HI / 24,860LO
30,030HI / 22,840LO
Output [BTU]
23,250HI 21,375HI 25,685HI 22,525HI
Orifice Size (0-4500ft)
#35 #51 #32 #50
Air Shutter
3/16” 1/2” 3/16” 1/2”
Gas Inlet Size
S.I.T. 820 Nova, 3/8” NPT
Gas Supply Pressure
Minimum
Normal
Maximum
Natural Gas
4.5” 7” 9”
Liquid Propane
11” 11” 12”
Manifold Pressure High
3.5” w.c. [0.87KPa]
NG
10”
w.c.
[2.61KPa]
LP
Manifold Pressure Low
1.6” w.c. [0.40KPa]
6.3” w.c. [1.57KPa]
