14
This wat er h eat er s hou ld n ot b e co nn ect ed t o an y he ati ng s yst ems or
component(s)usedwithanon-potablewaterheat ingappliance.
All piping components c onnected to this unit for space heating
applications should be suitable for use w ith potable water.
Toxic c he mic als , su ch a s th ose use d fo r bo il er t rea tme nt s hou ld n ot
be introduced into this system.
When t he sy ste m req uir es wa ter f or sp ace heat ing at te mpe ratu res
higher than required for domestic water purposes, a mixing
valve must be installed. Please refer to Figur e 2 for suggested
piping arrangement.

space heatInG and potaBle water sYsteM

This appl iance ha s been des ign cer tied as  complyi ng with
America n National S tandard /CSA Stan dard for wate r heaters
and is con sidered  suitabl e for Water  (Potable) H eating a nd
Space Heating.
Your water heater is equipped with inlet/outlet connections
for us e in  sp ace  he ati ng  app li cat io ns ( see  Fi gur e 2) . If  th is
water heater is to be used to s upply both space heating and
potab le (d ri nki ng) w ate r, th e ins tr uct ion s li ste d be low  must
be followed:
•Besuretofollowthemanual(s)shippedwiththeairhandlerorother
type heating system.
•Thiswaterheaterisnottobeusedasareplacementforanexisting
boiler installation.
•Donotusewithpipingthathasbeentreatedwithchromates,boiler
seal or other chemicals and do not add any chemicals to the water
heater piping
•Ifthespaceheatingsystemrequireswatertemperaturesinexcessof
120°F(49°C),amixingvalvemustbeinstalledperthemanufacturer’s
instructions in the potable hot water supply to limit the risk of scald
injury.
•Pumps,valves,pipingandttingsmustbecompatiblewithpotable
water.
•A prope rly in stal led fl ow con trol v alve i s requ ired t o prev ent
thermosiphoning. Thermosiphoning is the result of a continuous
owofwater through the air handler circuit during the off cycle.
Weeping(blowoff) of the temperature and pressure relief valve
(T&P)orhigherthannormalwatertemperaturesaretherstsigns
of thermosiphoning.
•The hot water line from the water heater should be vertical past
any mixing valve or supply line to the heating system to remove air
bubbles from the system.
•Donot connect the water heater to any system or components
previously used with non-potable water heating appliances when
used to supply potable water.

closed water sYsteMs

Water supply systems may, because of code requirements or such
conditions as high line pressure, among others, have installed
devices such as pressure reducing valves, check valves, and back
owpreventers.Devices suchasthese causethewater systemto
be a closed system.

cheMIcal vapor corrosIon

CORROSION OF THE FLUEWAYS AND VENT SYSTEM MAY
OCCUR IF AIR FOR COMBUSTION CONTAINS CERTAIN CHEMICAL
VAPORS. SUCH CORROSION MAY RESULT IN FAILURE AND
RISK OF ASPHYXIATION.
Spray can propellants, cleaning solvents, refrigerator and air
conditioning refrigerants, swimming pool chemicals, calcium and
sodiumchloride(watersoftenersalt),waxes,andprocesschemicals
are typical compounds which are potentially corrosive.
Do not store products of this sort near the heater. Also, air which is
brought in contact with the heater should not contain any of these
chemicals. If necessary, uncontaminated air should be obtained from
remote or outside sources. The limited warranty is voided when failure
ofwaterheaterisduetoacorrosiveatmosphere.(Seelimitedwarranty
forcompletetermsandconditions).

water pIpInG

DANGER

Water temperature over 125°F (52°C)
can cause severe burns instantly
resulting in severe injury or death.
Children, the elderly and the physically
or mentally disabled are at highest
risk for scald injury.
Feel water before bathing or showering.
Temperature limiting valves are
available.
Read instruction manual for safe
temperature setting.
HOTTER WATER CAN SCALD:
Water heaters are intended to produce hot water. Water heated to
a temperature which will satisfy space heating, clothes washing,
dish washing, cleaning and other sanitizing needs can scald and
permanently injure you upon contact. Some people are more likely
to be permanently injured by hot water than others. These include
theelderly,children,the inrm, or physically/mentally handicapped.
Ifanyoneusinghot watertsintoone ofthesegroups orifthereis
a local code or state law requiring a certain temperature water at the
hot water tap, then you must take special precautions. In addition to
usinglowestpossibletemperaturesettingthatsatisesyourhotwater
needs, a means such as a mixing valve, should be used at hot water
taps used by these people or at the water heater, see Figure 2. Valves
for reducing point of use temperature by mixing cold and hot water are
also available:
ConsultaQualiedInstallerorServiceAgency.Followmanufacturer’s
instructions for installation of valves. Before changing the factory setting
onthermostat,read“TemperatureRegulation”sectioninthismanual.
InstallInG the new water heater