Electrical Controls And Wiring; Boiler Room Air Supply And Ventilation; Draft Hood Installation; Piping At Boiler-Water Boilers - Slant/Fin Galaxy GG-300 Installation And Operating Instructions Manual

GALAXY
ELECTRICAL WIRING
DANGER: Before wiring, always turn off electric power supply,
otherwise shock or death can result.
Power Supply
A separately fused circuit is recommended. Use a standard
15 Amp. fuse or breaker and 14 gauge conductors in BX
cable or circuit.Provide disconnect means and overload protec-
tion as required. See boiler wiring diagram (Figure 6). Boiler
must be electrically grounded in accordance with requirements
of the authority having jurisdiction, or, in the absence of such
requirements, with the National Electrical Code, ANSI/NFPA
70-latest edition.

BOILER ROOM AIR SUPPLY AND VENTILATION

An ample supply of air is required to obtain combustion and
ventilation. Room temperature over 100°F may cause nuisance
tripping of the Blocked Vent Safety Switch.
ALL AIR MUST COME FROM OUTSIDE, directly through wall
openings to the boiler or through unsealed openings around
windows, doors, etc. in the whole building. When buildings are
insulated, caulked and weather-stripped, now or later on, direct
opening to outside may be required and should be provided. If
the boiler is not on an outside wall, air may be ducted to it from
outside wall openings.
The National Fuel Gas Code, ANSI Z223.1-latest edition speci-
fies openings for air under various conditions. Local codes may
PIPING AT BOILER — WATER PIPING
I. CIRCULATING SYSTEMS
A.Packaged water boilers are equipped with a water circulat-
ing pump, mounted to return the water into the boiler. For
some installations, the pump should be on
the supply main. See PUMP LOCATION.
II. AIR CONTROL SYSTEM
A.DIAPHRAGM-TYPE COMPRESSION TANKS are used to
control system pressure in an AIR ELIMINATING SYS-
TEM: an automatic air vent is used to REMOVE air from
the system water. See illustration.
If system pressure needs further control, add an additional
tank or install a larger capacity tank.
Locate the tank near the boiler, as illustrated.
specify minimum opening sizes and locations. The following
recommendation applies to buildings of energy-saving construc-
tion, fully caulked and weather stripped:
Provide one GRILLED opening near the floor and one near the
ceiling on an outside wall near the boiler (or duct from such
openings to the boiler), EACH opening to be a minimum of one
square inch per 2000 Btuh input to ALL APPLIANCES in the
area. For a total appliance input of 200,000 Btuh, each open-
ing will be 100 square inches. A grilled opening 10" x 10" has
100 square inches of area. If fly screen must be used over
openings, double the area and inspect and clean the screen
frequently.
Openings must NEVER be reduced or closed. If doors or win-
dows are used for air supply, they must be locked open.
Protect against closure of openings by snow and debris.
Inspect frequently.
NO MECHANICAL DRAFT EXHAUST OR SUPPLY FANS ARE
TO BE USED IN OR NEAR THE BOILER AREA.
The flow of combustion and ventilating air to the boiler must
NOT be obstructed.
DRAFT HOOD—
The draft hood supplied is part of the listed boiler assembly.
DO NOT alter the hood. See dimensions, page 2.
Attach the hood to the boiler flue outlet. Connect flue pipe full
size of hood outlet. If a vent damper is added, it must be
installed on the outlet side of the hood. See Vent Piping,
An automatic air vent should be installed in the top of the
boiler. See illustration.
B.PUMP LOCATION — Locating low-head pump(s) on
return to boiler is acceptable for smaller boiler sizes in
residences of one or two stories. The alternate pump
location shown in illustration, is required in large, multi-
story building installations, especially when high-head
pumps are used. The compression tank must be at the
boiler or between boiler and supply main pump(s).
C.On a hot water boiler installed above radiation level,the
boiler must be provided with a low water cut-off device at
the time of installation by the installer.
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