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| Canadian Installations 1 | US Installations 2 |
H = Clearance to each side of center line | 3 feet (91 cm) within a height 15 feet (4.57 | * | |
| extended meter/regulator assembly. | m) above the meter/regulator assembly. |
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I = | Clearance to service regulator vent | 3 feet (91 cm) | * |
| outlet. |
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J = | Clearance to nonmechanical air supply | 6 inches (15 cm) for appliances < 10,000 | 4 feet (1.2 m) below or to side of opening; |
| inlet to the combustion air inlet to any | Btuh (3 kW), 12 inches (30 cm) for appli- | 1 foot (300 mm) above opening. |
| building or other appliance. | ances > 10,000 Btuh (3kW) and |
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| < 100,000 Btuh (30kW), 36 inches (91 cm) |
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| for appliances > 100,000 Btuh (30kW). |
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K = | Clearance to mechanical air supply | 6 feet (1.83 m) | 3 feet (91 cm) above if within 10 feet |
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| inlet. |
| (3 m) horizontally. |
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L = | Clearance above paved side walk or | 7 feet (2.13 m) | 7 feet (2.13 m) |
| paved driveway located on public |
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| property. |
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M = Clearance under veranda, porch, deck | Not Allowed | Not Allowed | |
| or balcony. |
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1 In accordance with current
2 In accordance with current ANSI Z223.1/ NFPA 54 National Fuel Gas Code.
+ A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves both dwellings. * If clearances are not specified then follow local installation codes and the requirement of the gas supplier.
Draining the Condensate – In cer tain conditions, installations in unconditioned space or having long horizontal or vertical runs may accumulate condensate. In order to prevent condensate from draining back into the blower, we recommend that it be drained. This unit is provided with a special fitting on the blower that allows for the draining of condensate formed in the vent. The drain hose should have two (2) loops formed, to act as traps. Before operation of the water heater, both loops should have water placed in them. Support the traps so that they remain horizontal. Condensate is known to be acidic; refer to local, state or federal codes for proper handling methods.
Figure 10 - Draining the Condensate
JOINING PIPES AND FITTINGS – All pipe, fittings, solvent cement, primers and procedures must conform to Ameri- can National Standards Institute and American Society for Testing and Materials (ANSI/ASTM) standards.
CEMENTING JOINTS – All joints in the vent piping must be properly sealed and we recommend using the following mate- rial:
PVC materials should use ASTM
Cleaner-Primer and Medium Body Solvent Cement
1.Cut pipe end square, remove jagged edges and burrs. Cham- fer end of pipe, then clean fitting socket and pipe joint area of all dirt, grease or moisture.
2.After checking pipe and socket for proper fit, wipe socket and pipe with
3.Apply a thin coat of cement evenly in the socket. Quickly apply a heavy coat of cement to the pipe end and in- sert pipe into fitting with a slight twisting motion until it bottoms out.
NOTICE: Cement must be fluid; if not, recoat.
4.Hold the pipe fitting for 30 seconds to prevent the tapered socket from pushing the pipe out of the fitting.
5.Wipe all excess cement from the joint with a rag. Allow 15 minutes before handling. Cure time will vary according to fit, temperature and humidity.
NOTICE: Stir the solvent cement frequently while using. Use a natural bristle brush or the dauber supplied with the can. The proper brush size is one inch.
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