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ES/ESH-LT209_10152019
Single Stage Unitary Range
VENTING AND COMBUSTION AIR DUCTING
Combustion Air Supply (Optional)
•
An outside combustion air supply is strongly recommended if the building space encloses a negative
pressure due to exhaust etc. or if the building contains materials which would expose the heater to
halogenated hydrocarbon atmospheres.
•
The outside air terminal must be of an approved type, and should be located at an elevation equal to or
below the vent terminal elevation to prevent back-venting of flue gases into the burner compartment.
•
Install single wall pipe or PVC pipe and fittings with a 12" linear section of flexible duct to allow movement of
the heater. Do not use flexible duct throughout the entire length of fresh air duct. This may cause nuisance
air switch tripping.
Outdoor Installation (ESH Models Only)
When a heater is to be mounted outdoors it must be installed in such a way that wind will have minimum effect
on its movement. This consideration is intended to eliminate undue stress on the gas flex connector. In all cases
a fresh air hood must be used in conjunction with a vent terminal of the approved type, and all connections must
be sealed with a high temperature sealant that can withstand 400°F
Note:
This heater is a sealed construction. If any service or repair is conducted in the future, gasket materials
should be inspected and replaced if found to be deteriorated.
Figure 27: Installation of Outside Air as Supply for Combustion
MUST BE FLEXIBLE DUCT
AIR FLOW DIRECTION
TO OUTSIDE AIR:
DIRECTLY TO OUTSIDE OR
TO COMMON DUCTWORK
FROM BLOWER
12" MAX.
FOR ALL
FLEX DUCT
NOTE:
DO NOT USE FLEX DUCT TO FORM AN ELBOW!
NOTE:
CLOSE ALL CHAIN
LINKS, QUICK LINKS AND
ANY OPEN CONNECTIONS
Figure 28: Outdoor Installation
SEAL JOINTS
FRESH AIR INLET HOOD
SEAL JOINTS
VENT TERMINAL
Summary of Contents for ES/ESH Series
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