Carrier 61SW - Manual (Page 6)

If boiler is installed with single wall vent, it must have a 6-in.
clearance between its surface and any combustible material. A new
Type-Bl vent pipe or flexible liner must be installed in accordance
with the instructions furnished with the vent.
Check the vent pipe to see if it is firestopped where it goes through
the floor or ceiling. It should have an approved vent cap with
clearances from the roof as shown in Fig. 9. If clearances are less
than shown in Fig. 9, have the vent checked by local authorities.
- LINER
- CHIMNEY
A92406
Fig. 10—Venting Boiler Into Masonry Chimney
For boilers connected to gas vents or chimneys, vent installations
shall be in accordance with Part 7, Venting of Equipment, of the
National Fuel Gas Code, ANSI Z223.1-latest issue and applicable
provisions of the local building codes.
Vent connectors serving appliances vented by natural draft shall
not be connected into any portion of mechanical draft systems
operating under positive pressure.
The induced-combustion boiler can be common vented with a
water heater. (See Fig. 11.)
REMOVAL OF EXISTING BOILER FROM COMMON VENT
SYSTEM
1. In replacement installations where an existing vent system
may be used, inspect the vent system for condition, size, type
of material, and height to meet the appliance application
requirements. If it is oversized, condensation could corrode
the venting system. Installation of a new venting system may
be required.
2. When removing an existing boiler from a venting system
serving other appliances, the vent system is likely to be too~
large to vent the remaining attached appliances properly.
The following steps shall be followed with each appliance
remaining, connected to the common venting system placed in
“operation 7 while-the"otherappliances-remaining-connected-to-
the common venting system are not in operation:
a. Seal any unused openings in the common venting system.
b. Visually inspect the venting system for proper size and
horizontal pitch and determine there is no blockage or
restriction, leakage, conosion and other deficiencies which
could cause an unsafe condition.
c. Insofar as is practical, close all building doors and windows
and all doors between spaces in which appliances remain­
ing connected to the common venting are located and other
spaces of the building. Turn on clothes dryers and any
appliance not connected to the common venting system.
Turn on any exhaust fans, such as range hoods and
bathroom exhausts, so they will operate at maximum speed.
Do not operate a summer exhaust fan. Close fireplace
dampers.
d. Follow the lighting/operating instructions. Place the appli­
ance being inspected in operation. Adjust thermostat so
appliance will operate continuously.
e. Test for spillage at the drafthood relief opening after 5
minutes of main burner operation using the flame of a
match or candle.
f. Mter it has been determined that each appliance remaining
connected to the common venting system properly vents
when tested as outlined above, return doors, windows,
exhaust fans, fireplace dampers and any other gas-burning
appliance to their previous conditions of use.
g. If improper venting is observed during any of the above
tests, the common venting system must be corrected. The
vent system or vent connectors may need to be resized
----- according-to-these-instruetions-to-approaeh-the-minimum—
sizénñsiñgfKeTppWpfiáté^GAMA'Vehting Tables7Paft 7 bf~
the National Fuel Gas Code NFPA 54-1988/ANSI Z223.1-
1988.
-ELECTRICAL-
IMPORTANT: Before proceeding with the electrical connections,
make certain the volts, hertz, and phase correspond to that
specified on the boiler rating plate. -
The specific unit Installation Instructions contain wiring diagrams
which show the proper field high- and low-voltage wiring. Make
all connections in accordance with the National Electrical Code
and any loeal codes or ordinances that might apply.
The boiler, when installed, must be electrically grounded in
accordance with the National Electrical Code, ANSI/NFPA No.
70-1990.
A permanent, separately fused electrical power supply, complete
with manual disconnect switch, must be provided for this unit.