Domestic Hot Water Heaters - Smith 8 SERIES Installation & Operating Instructions Manual

8 SERIES BOILER INSTALLATION AND OPERATING INSTRUCTIONS

DOMESTIC HOT WATER HEATERS

Tankless domestic hot water heaters are available for
water boiler application.
Figure No. 9 – Tankless Heater
C
H
OPERATING CONTRO L
TEMPERING VALVE
CHECK VALV E
COLD WATER SUPPL Y
DOMESTIC HOT WATER SUPPLY
WATER BOILER
No. of Firing
Sections Rate
Low
3
High
Low
4
High
Low
5
High
Low
6
High
40° to 140°F temp. rise at 180°F boiler water.
TEMPERED HO T
WATER SUPPL Y
Table 1
Intermittent Continuous
Draw (GPM) Draw (GPM)
2.50 1.75
2.50 2.00
3.30 2.50
3.30 2.90
3.80 3.30
4.50 3.90
4.60 4.00
5.00 4.90
WATER BOILER MAINTENANCE
CAUTION: Servicing, inspection and adjustment
must be done by a trained technician in accordance
with all applicable local and national codes.
Improper servicing or adjustment can damage the
boiler!
The boiler must be cleaned and inspected at least on
a year before each heating season. Make sure that the
burner and ignition components are free from dust, soot,
dirt, corrosion or other deposits that would impair the
boiler's performance.
Safety checks should include, but not limited to, the items
listed in the 8 Series Boiler Safety Checklist. This Safety
Checklist is included at the end of the manual. A trained
technician with a calibrated combustion analyzer should
be hired to test and set up the oil burner to assure
maximum safety and effi ciency. Consult the manufacturer
of each individual safety control for recommendations for
service and adjustment.
IMPORTANT - These suggestions cover the
boiler maintenance work which will result
in the most effi cient operation, the longest
useful life of the boiler and the highest return
on any investment necessary to carry out the
maintenance work.
Water Controls
1. WATER PRESSURE: The boiler water pressure must
be suffi cient to maintain a full system and to prevent
boiling of the system water. An initial fi ll pressure of
12 psi provides for 18-1/2' of system height. Each
additional 2.3' of height requires an additional one
pound pressure. Be sure no air is trapped in the
boiler, system piping or heating units to impede
circulation of the heated boiler water.
2. LOW WATER CUTOFF: Check the Hydrolevel
Hydrostat control to be certain the switch opens on
water level drop below cutoff point.
3. TEMPERATURE CONTROLS: Check regularly
to be sure the controls are functioning to prevent
excessive high boiler water temperature.
4. RELIEF VALVES: Conduct regular visual inspection
of relief valves to detect signs of corrosive deposits,
rust buildup or signs of weeping. It should not weep
or discharge water at normal system pressure.
NEVER try to clean or repair the relief valve! If valve
fails replace it! Replace the valve with a new valve
of proper capacity and pressure setting if defective.
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