Lochinvar ARMOR 151 - Manual (Page 22)

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
ƽ WARNING
Model Kit Number
Equivalent Vent
Length
151 - 200 CVK3003 3 feet
286 CVK3007 3 feet
400 CVK3007 5 feet
501 - 601 CVK3007 30 feet
Table 3E Concentric Vent Kit Equivalent Vent Lengths
Figure 3-14 Near Water Heater Stainless Steel Venting
Models 701 - 801
4" S.S. ADAPTER
VENT
4" S.S. INTERMEDIATE
(FOR SAF-T VENT ONLY)
Figure 3-13 Near Water Heater Stainless Steel Venting
Models 286 - 601
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
151 - 200 3 inches 3 inches
286 - 601 4 inches 4 inches
701 - 801 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