REGULATION INSTRUCTIONS
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The condensate drain line should be a minimum of 1/2” diameter that connects to the 7/8” supplied hose and must be
supported to prevent sagging. Manufacturer will supply a ¾” to ½” reducer for connection.
■ Keep the length of the condensate drain as short as possible. Long runs or applications where the nearest
drain is above the water heater will require the use of a condensate pump. Size the pump to allow for a
maximum condensate discharge of 2 gpm from the water heater. The end drain pipe must not be submerged in
water or blocked in any way.
■ The condensate pump must be installed with an overflow safety switch that detects downstream clogs and
shuts off the water heater before flooding occurs. See condensate pump manufacture for installation
instructions.
■ Be sure to check that condensate is freely flowing from the drain piping after the system has been installed.
Condensate will begin flowing out of the water heater within 15 minutes after operation has started.
■ Do not run condensate line outside and take measures to prevent the condensate drain lines from freezing
(insulation, heat tape, electric heaters, etc.)
■ Be sure to clean the condensate trap at least once per year to prevent any problems, and after cleaning be
sure to check for any leaks of condensed water or flue gas.
Space Heating
Suitable for combination water (potable) heating and space heating and not suitable for space heating
applications only.
Piping and components connected to the water heater for the space heating application shall be suitable for
use with potable water.
Toxic chemicals used for water heater treatment shall not be introduced into the potable water.
A water heater which will be used to supply potable water shall not be connected to any heating system of
component(s) previously used with nonpotable water heating appliance.
When the system requires water for the space heating at temperatures higher than required for other uses, a
means such as a mixing valve shall be installed to temper the water for those uses in order to reduce scald
hazard potential.
The water heater can be used for potable hot water heating and combination space heating applications.
Note: the following illustrations are conceptual designs only. There are many design variations of the equipment
presented. Designers must add all necessary safety and auxiliary equipment to conform to Code requirement and
proper design practice. For more details, contact the manufacturer or distributors of the products.
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