34000 Autry Street, Livonia, MI 48150 | 800.968.5530 | Fax 734.419.0209 | www.hamiltonengineering.com | LIT91127US REV 5/2018
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VENTING
3. If practical, close all building doors, windows and all doors between the space in which the
appliance remains connected to the common venting system and other spaces in the building. Turn
on clothes dryers and any appliances not connected to the common venting system. Turn on any
exhaust fans, such as range hoods and bathroom exhausts, at maximum speed. Do not operate a
summer exhaust fan. Close all fireplace dampers.
4. Place the appliance being inspected in operation. Follow the lighting instructions. Adjust the
thermostat so the appliance will operate continuously.
5. Test for spillage at the draft hood relief opening after 5 minutes of main burner operation. Use the
flame of a match or candle or smoke from a cigarette.
6. After it has been determined that each appliance remaining connected to common venting system
properly vents when tested as outlined, return doors, windows, exhaust fans, fireplace dampers and
any other gas burning appliance to their previous condition of use.
7. Any improper operation of the common venting system should be corrected so the installation con
forms with the National Fuel Gas Code, ANSI Z223.1. When resizing any portion of the common
venting system, the common venting system should be resized to approach the minimum size as
determined using the appropriate tables in Appendix G in the National Fuel Gas Code, ANSI Z 223.1
E. HEATER REMOVAL FROM AN EXISTING COMMON VENT SYSTEM CONT.
F. CONDENSATE REQUIREMENTS
This is a condensing high efficiency appliance, therefore this unit
has a condensate removal system. Condensate is nothing more
than water vapor derived from the combustion products, similar
to an automobile when it is initially started. This condensate does
have a low pH and should be treated with a Condensate Neutral-
izer Filter. This filter contains either lime or marble rocks, which
will neutralize the condensate. The outlet of the filter is sized
for 1.5" PVC pipe.
It is very important that the condensate
line is sloped away from and down to a suitable inside
drain.
A condensate neutralizer and a condensate pump
kit are available from Hamilton Engineering, Inc. It is also
very important that the condensate line is not exposed
to freezing temperatures, or any other type of
blockage. Plastic tubing or PVC pipe should be
the only materials used for the condensate line.
Steel, brass, copper or others will be subject to
corrosion and deterioration. A second vent may
be necessary to prevent condensate line vacuum
lock if a long horizontal run is used. The EVO
appliance has an automatic safety device that will
shut it down in the event of a condensate drain
blockage. Please test annually.
Maximum volume of condensate produced is
11 gallons per hour per 1,000,000 BTU of gas burned.
CONDENSATE DRAIN FROM
HEAT EXCHANGER
HOSE CLIP
HOSE FROM DRAIN TO TRAP
HOSE CLIP
CONDENSATE HOSE
FROM AIR INLET
BLOCKED DRAIN SWITCH
HOSE FROM SWITCH
TO TRAP
DRAIN TRAP
CLEAN OUT CAP
GROMMET FOR CABINET
DRAIN TUBE
ATMOSPHERIC
GRAVITY DRAIN
DO NOT SEAL THE
OPENING BETWEEN
THESE PIPES, OR
PRODUCT DAMAGE
MAY OCCUR.
(FIGURE 4-7)
CONDENSATE DRAIN DETAIL
NOTE:
Heat
exchanger
MUST be level
or pitched
slightly to
the rear!
WARNING
In a common vent system, DO NOT POWER THE UNIT OFF! Equipment damage
may occur. To disable operation, turn off gas, NOT power. If you have any questions,
please call Hamilton Engineering Technical Support at 800.968.5530.