GALAXY
9
right hand corner of the boiler wiring diagram with the
identical number on one of the diagrams in this manual.)
If the boiler has an input of 300,000 Btu/hr. or greater,
cut the RED wire connected between numbers 3 and 4
of "RECEPTACLE A" (the only wire connected to this
receptacle) and then disconnect "RECEPTACLE A" from
"MALE PLUG". Remove "RECEPTACLE A" from job
site and discard.
2. Separate the vent pipe directly on top of the draft hood
or diverter and place damper in position as shown in fig-
ures 4 - 9. The vent damper must be installed so that
the damper position indicator is in a visible location after
installation for position indicator description. The arrow
imprint on the damper should point in direction of vent
gas flow (towards chimney). Re-assemble the vent pip-
ing. Be sure the vent damper is well seated and fas-
tened with 3 sheet metal screws. Screws should be no
longer than 1/2 inch.
3. Be sure that undersized vent pipe does not block move-
ment of damper vane.
4. Boilers that may have vent damper are factory wired
with plug and "RECEPTACLE A". To install the vent
damper all that is required is removal of the "RECEPTA-
CLE A" and connection of the vent damper harness to
the boiler plug. (Remove "RECEPTACLE A" from job
site and discard.) Boilers that must have a vent damper
are factory wired with plug only.
a) Attach the flexible metallic conduit vent damper har-
ness to the right hand side of the jacket by passing
the free end of the harness through the 7/8" diameter
hole in the top of the jacket, and using the BX con-
nector at the free end of the metallic conduit, fasten to
jacket.
b) Connect "RECEPTACLE B" (free end of vent damper
harness) into "MALE PLUG" (see correct wiring dia-
gram for both continuous and intermittent pilots).
FIGURE 8a & 8b
FIGURE 9
5. All Slant/Fin Corp. Galaxy steam boilers equipped with
intermittent pilot ignition and continuous (standing) pilot
systems are factory wired except for the wires to the low
water cut-off and pressure cut-off. Wire these controls with
wire provided with boiler (see boiler wiring diagram on boil-
er). Then follow previous instructions shown in #4 above.
GXHA boilers only: Two provided red wires must be
connected to “blocked vent safety switch located on the
rear section of the draft diverter (see figure 7).
6. Restore electrical power and turn on gas supply.
D. AFTER INSTALLATION:
1. Operate system through two complete cycles to check for
opening and closing in proper sequence, and proper burn-
er operation. DAMPER MUST BE IN OPEN POSITION
WHEN BOILER MAIN BURNERS ARE OPERATING.
2. Perform installation checks as required by ANSI specifica-
tion Z21.66.
3. Replace the front cover of the boiler.
4. Check the troubleshooting section if problems arise with
the installation.
E.THERMOSTAT HEAT ANTICIPATOR ADJUSTMENTS
If the 24V room thermostat that controls this boiler has an
adjustable heat anticipator and has previously been
adjusted without a vent damper, then see publication VD-
40 for correct electrical requirement adder for the vent
damper used. If room thermostat has not been adjusted,
connect entire system to thermostat and run the system
while measuring the current drawn through the thermostat
wires. Set the heat anticipator at the value of current
measured. For more information, see Slant/Fin vent
damper installation manual, pub. VD-40, and the manufac-
turer's vent damper booklet shipped with the vent damper.
OPERATING INSTRUCTIONS, BASIC
Before firing boiler, make these checks:
1. Relief valve is installed. Installation of the relief valve shall
be consistent with the ANSI/ASME Boiler Pressure Vessel
Code. Valve opening is NOT closed or reduced in size.
2. Draft hood is installed and vented to chimney.
3. All wiring is completed, following applicable wiring diagrams.
4. If a vent damper is added, damper is in full open posi-
tion. See instructions furnished with vent damper.
5. Using soap solution, check for gas leaks in all gas piping
from meter to boiler pilot and manifold. DO NOT use open
flame.
I. FILLING AND VENTING WATER SYSTEMS
A.Fill the system with water. Vent or purge off air.
B.Fire the boiler as soon as possible (see following warning
and instructions) and bring water temperature to at least
180 degrees, while circulating water in the system.
C.Vent air and add water as needed to achieve operating
pressure on boiler gauge. Pressure must be between
approximately 12 psi (cold water) and 25 psi (at water
temperature setting of high limit control), for boilers
equipped with 30 psi relief valves. Boilers rated for a high-
er pressure and equipped with a matching relief valve may
operate at a higher pressure, but no higher than 5 psi
below the relief valve opening pressure.
D.Check for and repair any leaks before placing system in
service. Make sure that none of the automatic gas ignition
system components are exposed to water.
