Thermal Solutions EVS SERIES - Page 45

45
WARNING
The maximum operating pressure of this boiler
is 160 psig. Never exceed this pressure. This
boiler was supplied with a safety relief valve with
a pressure relief setting specied at the time of
purchase. The relief valve setting must be above
the maximum operating pressure of the system.
Consult Thermal Solutions if the desired system
operating pressure is above the safety relief
valve pressure setting. Do not plug or change
safety relief valve.
C. Power the boiler - Turn on electrical supply to the
boiler and circulation system at fused disconnect
switches. Note that there is electrical power at certain
components even with the power switch off. See wiring
diagrams in Figures 9a-9f.
D. Power the Circulators - Turn system circulators on
and purge air from the boiler and system piping.
1. Conrm motor rotation on boiler and system
circulators.
2. Conrm that water ow switch is operating
properly.
E. Pressurize the Fuel System - Turn on gas supply to the
boiler gas piping.
1. Conrm that the supply pressure to the gas regulator
supplied with the boiler conforms to Table 3 for
maximum and minimum supply pressures.
2. Open the manual gas shut-off valves located
upstream of the gas regulator supplied with the
boiler. Do not open manual gas valve inside of
boiler jacket.
DANGER
Do not use matches, candles, open ames or
other ignition source to check for leaks.
3. Using soap solution, or similar non-combustible
solution, electronic leak detector or other approved
method, check that boiler gas piping valves,
regulators and all other components are leak free.
Eliminate any leaks.
4. Purge gas line of air.
5. Reset low gas pressure safety switch.
F. Select Operational Mode - Refer to the Thermal
Solutions Boiler Control
TM
(TSBC
TM
) Instruction
Manual to select the desired control features.
G. Check Blower Rotation - Remove air lter to expose
the fan blades.
1. Allow boiler to enter the sequence of operation.
2. While in Pre-Purge, position the ame control to the
test position.
3. Conrm proper blower motor rotation.
4. Shut boiler off and position the ame control back
to run. Reinstall air lter.
H. Flame Safeguard Operation Check - Turn boiler
operating switch to the on position.
1. Allow boiler to complete prepurge and trial for
ignition period. Once pilot ame is recognized
by controller, position ame control switch to test
position.
2. Look through the boiler sight glass and conrm that
pilot ame is blue and steady and that the ame
signal is steady and between 1.5 and 5.0 volts DC.
On some boiler sizes, the pilot ame may not be
visible. In these cases, conrm proper ame signal
(as indicated above.)
3. Adjust pilot gas regulator until proper pilot manifold
gas pressure is achieved per retest report label.
Pilot ame should be blue with very little yellow.
4. Turn the boiler off, place ame control switch in
"run" position, and repeat Steps H.1 and H.2 at least
ve times until reliable pilot ignition and signal is
achieved and conrmed.
5. With the pilot operating properly, allow boiler to
continue to trial for main ame. Conrm that the
ame control locks out on main ame failure.
6. Open the manual main gas shut-off valve located
inside the boiler jacket. Using the procedure detailed
in Step E.3, leak test gas piping and valves inside of
jacket. Eliminate any leaks.
7. Reset ame safeguard and allow boiler to run
through prepurge, trial for pilot and trial for main
ame.
8. Conrm that main ame ignites smoothly.
9. Observe main ame and conrm that burner element
is evenly orange without ickering.
10. Observe ame signal and conrm signal is steady
and between 1.5 and 5.0 volts DC.
11. Using the procedure detailed in step E.3, leak test
gas piping and valves inside of jacket. Eliminate any
leaks.