20
Ga
s S
up
pl
y
GAS SUPPLY
IMPORTANT
:
Any additions, changes or conversions required for
the furnace to satisfactorily meet the application should be made
by a qualified installer, service agency or the gas supplier, using
factory-specified or approved parts.
IMPORTANT
:
Connect this furnace only to gas supplied by a
commercial utility or commercial fuel provider.
IMPORTANT
:
A U.L. recognized fuel gas and CO detector(s) are
recommended in all applications, and their installation should be
in accordance with the detector manufacturer’s recommendations
and/or local laws, rules, regulations or customs.
GAS PIPING (SEE FIGURE 12)
Install the gas piping according to all local codes, state codes and
regulations of the utility company, whichever holds jurisdiction.
If possible, run a separate gas supply line directly from the meter
to the furnace. Consult the local gas company for the location of
the manual main shut-off valve.
The gas line and manual gas
valve must be adequate in size to prevent undue pressure
drop and never smaller than the pipe size to the combination
gas valve on the furnace.
Refer to Table 2 for the recom mended
pipe size for natural gas and Table 3 for LP gas pipe sizes.
IMPORTANT
:
It is permissible to run flexible gas connector inside
the unit to a piece of black pipe. If local codes allow the use of a
flexible gas appliance connector, always use a new listed connec-
tor. Do not use a connector which has previously serviced another
gas appliance. Massachusetts law limits flexible gas connectors to
a maximum of 36”.
Install a ground joint union outside the cabinet and within 3
feet to easily remove the control valve assembly. Install a
manual shut-off valve in the gas line outside the furnace cas-
ing.
The valve should be readily accessible to turn the gas supply
on or off. Install a drip leg in the gas supply line as close to the fur-
nace as possible. Always use a pipe compound resistant to the
action of liquefied petroleum gases on all threaded connections.
IMPORTANT:
When making gas pipe connections, use a back-up
wrench to prevent any twisting of the control assembly and gas
valve. Do not overtighten the connection.
Any strains on the gas valve can change the position of the gas
orifices in the burners. This can cause erratic furnace operation.
IMPORTANT
:
ENSURE that the furnace gas control valve not be
subjected to high gas line supply pressures.
DISCONNECT the furnace and its individual shut-off valve from
the gas supply piping during
any pressure testing that exceeds
1/2 PSIG (3.48 kPa).
GAS PIPE INSTALLATION
GAS VALVE
MANIFOLD
FLAME SENSOR
BURNERS
DIRECT SPARK
IGNITOR
UNION
DRIP LEG
4 TO 5 FEET
ABOVE FLOOR
REQ'D BY SOME
UTILITIES
DOWNFLOW
FIGURE 12
GAS PIPING INSTALLATION
MANUAL GAS VALVE
(IN CLOSED
POSITION)
GAS PIPING
!
WARNING
THIS FURNACE IS EQUIPPED AT THE FACTORY
FOR USE ON NATURAL GAS ONLY. CONVERSION
TO LP GAS REQUIRES A SPECIAL KIT IS AVAIL-
ABLE AT THE DISTRIBUTOR. FAILURE TO USE THE
PROPER CONVERSION KIT CAN CAUSE FIRE,
CARBON MONOXIDE POISONING, EXPLOSION,
PROPERTY DAMAGE, PERSONAL INJURY OR
DEATH. SEE THE CONVERSION KIT INDEX SUP-
PLIED WITH THE FURNACE. THIS INDEX IDENTI-
FIES THE PROPER LP GAS CONVERSION KIT
REQUIRED FOR EACH PARTICULAR FURNACE.
Содержание 801P series
Страница 48: ...48 CM 0614 ...
