American Standard VAPORSHIELD Residential 30, Operating, Installation And Service Manual

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8
Align the legs of the draft hood with the slots provided. Insert
the legs on the slots as shown in Figure 10. Do not alter the
draft hood in any way.
VENT PIPE SIZE
It is important that you follow the guidelines in these instructions for sizing a vent pipe system. If a transition to a larger vent size is
required, the vent transition connection must be made at the drafthood outlet. A water heater cannot operate properly without the
original venting system. An undersized system will cause formation of condensate, leakage, spillage, water heater malfunction, etc.
VERTICAL EXHAUST GAS VENT
:IVXMGEPI\LEYWXKEWZIRXWQYWXFIMRWXEPPIH[MXL90PMWXIHX]TI&ZIRXTMTIEGGSVHMRKXSXLIZIRXQERYJEGXYVIV´WMRWXVYGXMSRWERH
the terms of its listing.
-XQYWXFIGSRRIGXIHXSXLI[EXIVLIEXIV´WHVEJXLSSHF]EGIVXM½IHZIRXGSRRIGXSVSVF]HMVIGXP]SVMKMREXMRKEXXLIHVEJXLSSH
opening.
Vertical gas vents must be terminate with a listed cap or other roof assembly and be installed according to their manufactirer’s
instructions.
WATER PIPING
4MTIWERH½XXMRKWWLSYPHFIMRWXEPPIHMRGSQTPMERGI[MXLXLIMRWXEPPEXMSRHVE[MRK'LIGOJSVHMTXYFIMRGSPH[EXIV½XXMRKFIJSVI
GSRRIGXMSRSJ,38ERHGSPH[EXIVPMRIW-JXLIMRHSSVMRWXEPPEXMSREVIEMWWYFNIGXXSJVII^MRKXIQTIVEXYVIW[EXIVTMTMRKQYWXFI
protected. The water heater should be drained if being shut down during freezing temperatures.
-JWSPHIVGSRRIGXMSRWEVIYWIHW[IEXXYFMRKXSXLIEHETXSVFIJSVI½XXMRKEHETXSVXSXLIGSPHERHLSX[EXIV½XXMRK-XMWMQTIVEXMZI
XLEXRSLIEXFIETTPMIHXSXLI[EXIVLIEXIV½XXMRKEWXLI]QE]GSRXEMRRSQIXEPPMGTEVXW
-RWXEPPXLI[EXIVTMTMRKERH½XXMRKEWWLS[RMR*MKYVI
CAUTION OPERATING AN EMPTY OR PARTIALLY
FILLED WATER HEATER WILL RESULT IN DAMAGE TO
THE TANK
If you are replacing an existing water heater, be sure to use
the new draft hood supplied with the water heater. Secure
draft hood by placing leg tabs into top jacket openings.
DRAFTHOOD INSTALLATION
FIGURE 10
Drafthood installation
Drafthood
Jacket top
'SRRIGXXLIGSPH[EXIVWYTTP]²248XSXLI½XXMRKQEVOIH±'²
'SRRIGXXLILSX[EXIVWYTTP]²248XSXLI½XXMRKQEVOIH±,²
Important: Some models may contain energy saving heat traps to prevent the circulation
of hot water within the pipes. Do not remove the inserts within the heat traps.
The installation of unions in both the hot and cold water supply lines
is recommended for ease of removing the water heater for service or
replacement.
The manufacturer of this water heater recommends installing a tempering
valve or an anti-scald device in the domestic hot water Iine. These valves
reduce the point-of-use temperature of the water by mixing cold an hot
water and are readily available for use.
Install a shut-off valve in the cold water inlet line. It should be located close to
the water heater and be easily accessible. Know the location of this valve and
how to shut off the water to the heater.
A temperature and pressure relief valve must be installed in the opening
QEVOIH±8IQTIVEXYVIERH4VIWWYVI846IPMIJ:EPZI²SRXLI[EXIVLIEXIV
%HHEHMWGLEVKIPMRIXSXLISTIRMRKSJXLI84VIPMIJZEPZI*SPPS[XLI
MRWXVYGXMSRWYRHIV±8IQTIVEXYVIERH4VIWWYVI6IPMIJ:EPZI²
After piping has been properly connected to the water heater, remove the
aerator at the nearest hot water faucet. Open the hot water faucet and allow
XLIXEROXSGSQTPIXIP]½PP[MXL[EXIV8STYVKIXLIPMRIWSJER]I\GIWWEMV
OIITXLILSX[EXIVJEYGIXSTIRJSVQMRYXIWEJXIVEGSRWXERX¾S[SJ[EXIV
is obtained. Close the faucet. Check all connections for leaks. Replace
the aerator.
PRESSURE BUILD-UP IN CLOUSED WATER
SYSTEMS
The water utility supply meter may contain
EGLIGOZEPZIFEGO¾S[TVIZIRXIVSV[EXIV
pressure reducing valve.This will create a closed
water system. During the heating cycle of the
[EXIVLIEXIV[EXIVI\TERHWGVIEXMRKETVIWWYVI
build-up in the water system.A temperature and
pressure relief valve must be installed on the
water heater
47-QE\MQYQTVIWWYVIWIXXMRK7II
Temperature and Pressure ReliefValve¬Page 8).
To prevent the temperature and pressure relief
valve from discharging hot water, loss of energy,
and reduce the possible build up of lime on the
water temperature and pressure relief valve
WIEX%RI\TERWMSRXEROQYWXFIMRWXEPPIHSRXLI
cold water supply line. For every 50 US gallons
SJWXSVIH[EXIVXLII\TERWMSRXEROQYWXLEZIE
minimum capacity of 1.5 US gallons.
7II½KYVI
1.
2.
3.
4.
5.
6.
7.
Figure 10