Operating instructions

2
Part Number 550-142-784/0812
GWA Series 2 Gas-Fired Water Boilers – Boiler Manual
Installations must follow these codes:
• Local,state,provincial,andnationalcodes,laws,regulations
and ordinances.
• NationalFuelGasCode,ANSIZ223.1–latestedition.
• StandardforControlsandSafetyDevicesforAutomatically
FiredBoilers,ANSI/ASMECSD-1,whenrequired.
• NationalElectricalCode.
• ForCanadaonly:B149.1orB149.2InstallationCode,CSA
C22.1CanadianElectricalCodePart1andanylocalcodes.
Certification
 TheGWAboilergasmanifoldandcontrolsmetsafe
operatingandotherperformancecriteriawhenboiler
underwent tests specied in ANSI Z21.13–latest
edition.
Before locating the boiler:
o Checkfornearbyconnectionto:
• Systemwaterpiping
• Ventingconnections
• Gassupplypiping
• Electricalpower
o Checkareaaroundboiler.Removeanycombustiblematerials,
gasoline and other flammable liquids.
 Failuretokeepboilerareaclearandfreeofcom-
bustible materials, gasoline and other flammable
liquids and vapors can result in severe personal
injury, death or substantial property damage.
o Boiler must be installed so that gas control system components
areprotectedfromdrippingorsprayingwaterorrainduring
operation or service.
o Ifnewboilerwillreplaceexistingboiler,checkforandcorrect
system problems, such as:
1. Systemleakscausingoxygencorrosionorsectioncracks
fromhardwaterdeposits.
2. Incorrectly-sizedexpansiontank.
3. Lackofantifreezeinboilerwatercausingsystemandboiler
tofreezeandleak.
Codes & checklist
Failure to adhere to the guidelines below can
result in severe personal injury, death or sub-
stantial property damage.
When servicing boiler —
1. To avoid electric shock, disconnect electrical supply
beforeperformingmaintenance.
2. Toavoidsevereburns,allowboilertocoolbeforeper-
formingmaintenance.
Boiler operation —
3. Donotblockowofcombustionorventilationairtoboiler.
4. Shouldoverheatingoccurorgassupplyfailtoshutoff,do
notturnoffordisconnectelectricalsupplytocirculator.
Instead,shutoffthegassupplyatalocationexternalto
the appliance.
5. Donotusethisboilerifanyparthasbeenunderwater.
Immediatelycallaqualiedservicetechniciantoinspect
theboilerandtoreplaceanypartofthecontrolsystem
and any gas control that has been under water.
Boiler water —
6. DO NOT use petroleum-based cleaning or sealing
compounds in boiler system. Water seal deterioration
will occur, causing leakage between boiler sections,
circulator anges, diaphragm tanks or other system
components. This can result in substantial property
damage.
7. DO NOT use “homemade cures” or “boiler patent
medicines”. Serious damage to boiler, personnel and/
or property may result.
8. Continualfreshmakeupwaterwillreduceboilerlife.Min-
eralbuildupinsectionsreducesheattransfer,overheats
castiron,andcausessectionfailure.Additionofoxygen
and other gases can cause internal corrosion. Leaks
in boiler or piping must be repaired at once to prevent
makeupwater.
9. Donotaddcoldwatertohotboiler.Thermalshockcan
causesectionstocrack.
Glycol — potential fire hazard —
Allglycolisammablewhenexposedtohightemperatures.If
glycol is allowed to accumulate in or around the boiler or any
otherpotentialignitionsource,arecandevelop.Inorderto
prevent potential severe personal injury, death or substantial
propertydamagefromreand/orstructuraldamage:
• Never store glycol of any kind near the boiler or any
potential ignition source.
• Monitorandinspectthesystemandboilerregularlyfor
leakage.Repairanyleaksimmediatelytopreventpos-
sibleaccumulationofglycol.
• Neveruse automotiveantifreezeor ethyleneglycolin
thesystem.Usingtheseglycolscanleadtohazardous
leakageofglycolintheboilersystem.
1 Prepare boiler locationRead this first!
The boiler contains ceramic fiber and fiberglass
materials. Use care when handling these
materials per instructions on page 39 of this
manual. Failure to comply could result in severe
personal injury.