Smith 8 series - Steam Boiler Maintenance; Water Level; Low Water Cutoff; Pressure Controls

8 SERIES BOILER INSTALLATION AND OPERATING INSTRUCTIONS
Page 15
Domestic Hot Water Heaters
Tankless domestic hot water heaters are avaialble for
steam boiler applications.
Figure No. 14 - Tankless Heater
Table 2
STEAM 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 once
a year and 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 efficiency.
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.
Steam
1. WATER LEVEL: Check regularly to be sure the boiler
water level stays at the marked water line during
operation under steam pressure. DO NOT ADD
WATER TO A HOT BOILER. If water level is not
visible in the gauge glass, allow the boiler to cool
before adding makeup water. Locate the cause of
low water and correct before starting operation.
2. LOW WATER CUTOFF: Check the burner cutoff
switch to be certain the switch opens on water level
drop below cutoff level.
3. PRESSURE CONTROL(S): Check regularly to be
certain the pressure limit controls are functioning.
4. SAFETY VALVE: Conduct regular visual inspection of
safety valve to detect signs of corrosive deposits, rust
build-up 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 the valve fails
replace it! Replace the valve with a new valve of
proper capacity and pressure setting if defective.
5. GAUGE GLASS: When rust, suspended solids,
etc. appear in the gauge glass, blowdown may
be necessary. Blowdown should be limited only
as necessary to remove sediment from the boiler
waterways. Foaming, fluctuating water line,
steam hammer are signs pointing to the need for
blowdown.
H
C
COLD WATER SUPPL Y
CHECK VALV E
TEMPERED HO T
WATER SUPPL Y
TEMPERING VALVE
OPERATING CONTRO L
3
4
5
6
DOMESTIC HOT WATER SUPPLY
STEAM BOILER
No. of
Sections
Firing
Rate
Intermittent
Draw (GPM)
Continuous
Draw (GPM)
Low
High
Low
High
Low
High
Low
High
2.50
2.50
3.30
3.50
3.50
3.50
3.50
3.50
1.75
2.00
2.50
2.90
3.30
3.50
3.50
3.50