3 General venting
Figure
VENT
4" S.S. ADAPTER
4" S.S. INTERMEDIATE (FOR
Figure
The Armor water heater uses model specific combustion air intake and vent piping sizes as detailed in Table 3D below.
Table 3D Air Intake/Vent Piping Sizes
Model | Air Intake | Vent |
Installation & Operation Manual
Minimum / Maximum allowable combustion air and vent piping lengths are as follows:
Combustion Air = 12 equivalent feet minimum / 100 equivalent feet maximum
Vent = 12 equivalent feet minimum / 100 equivalent feet maximum
When determining equivalent combustion air and vent length, add 5 feet for each 90° elbow and 3 feet for each 45° elbow.
EXAMPLE: 20 feet of PVC pipe + (4) 90° elbows + (2) 45° elbows + (1) concentric vent kit (CVK3003) = 49 equivalent feet of piping.
NOTICE | The appliance output rating will reduce by | |
up to 1.5% for each 25 feet of vent length. | ||
| ||
Table 3E Concentric Vent Kit Equivalent Vent Lengths | ||
Model | Kit Number | Equivalent Vent | |
Length | |||
|
| ||
151 - 200 | CVK3003 | 3 feet | |
286 | CVK3007 | 3 feet | |
400 | CVK3007 | 5 feet | |
501 - 601 | CVK3007 | 30 feet |
Removing from existing vent
Follow the instructions in Section 1, page 12 of this manual when removing a water heater from an existing vent system.
Vent and air piping
Vent and air system:
Installation must comply with local NOTICE requirements and with the National Fuel
Gas Code, ANSI Z223.1 for U.S. installations or CSA B149.1 for Canadian installations.
You must also install air piping from outside to the water heater air intake adapter. The resultant installation is direct vent (sealed combustion).
You may use any of the vent/air piping methods covered in this manual. Do not attempt to install the Armor water heater using any other means.
151 - 200 | 3 inches | 3 inches | |
286 - 601 | 4 inches | 4 inches | |
701 - 801 | 4 inches | 6 inches | |
| Increasing or decreasing combustion air | ||
NOTICE | |||
or vent piping is not authorized. | |||
| |||
WARNING
DO NOT mix components from different systems. The vent system could fail, causing leakage of flue products into the living space. Use only approved stainless steel, PVC or CPVC pipe and fittings. For PVC/CPVC use with primer and cement specifically designed for the material used.
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