Service manual

Installation & Operation Manual
22
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
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.
NOTICE
 WARNING
Model Kit Number
Equivalent Vent
Length
150 - 199 CVK3003 3 feet
285 CVK3007 3 feet
399 CVK3007 5 feet
500 - 600 CVK3007 30 feet
Table 3E Concentric Vent Kit Equivalent Vent Lengths
Figure 3-14 Near Water Heater Stainless Steel Venting
Models 700 - 800
4" S.S. ADAPTER
VENT
4" S.S. INTERMEDIATE
(
FOR SAF-T VENT ONLY
)
Figure 3-13 Near Water Heater Stainless Steel Venting
Models 285 - 600
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.
The Armor water heater uses model specific combustion air
intake and vent piping sizes as detailed in Table 3D below.
Model Air Intake Vent
150 - 199 3 inches 3 inches
285 - 600 4 inches 4 inches
700 - 800 4 inches 6 inches
Table 3D Air Intake/Vent Piping Sizes
Increasing or decreasing combustion air or
vent piping is not authorized.
NOTICE
The appliance output rating will reduce by
up to 1.5% for each 25 feet of vent length.
NOTICE
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.
3 General venting