11
Figure 9. Alternate Removal Method
1
4
2
7
3
6
5
Alternate Bottom Panel Removal
If the bottom panel cannot be removed using the previous
instructions, the steps below are an alternate method for
removing the bottom panel. See Figure 9.
1. Remove the door (1) from the blower compartment .
2. Remove all screws securing the bottom panel (2) to
the front brace (3).
3. Remove two screws (4) securing the furnace cabinet
to the blower deck (5).
4. Remove all screws (6) securing the furnace cabinet
to the bottom panel (2).
5. Remove the screw (7) securing the bottom corner of the
furnace cabinet to the front brace (3).
6. Carefully spread the bottom corner of the furnace
cabinet outwards while sliding the bottom panel (2)
out through the front of the furnace.
7. Reassemble the furnace in reverse order.
6
7
5
1
2
3
4
Figure 8. Bottom Panel Removal
GAS SUPPLY AND PIPING
All gas piping must be installed in compliance with local
codes and utility regulations.
IMPORTANT NOTES:
• Some local regulations require the installation
of a manual main shut-off valve and ground joint
union external to the furnace as shown in Figure 10
(page 12). The shut-off valve should be readily
accessible for service and/or emergency use.
Consult the local utility or gas supplier for additional
requirements regarding placement of the manual
main gas shut-off.
• Gas piping must never run in or through air ducts,
chimneys, gas vents, or elevator shafts.
• Compounds used to seal joints on gas piping must
be resistant to the actions of LP propane gas.
• The main gas valve and main power disconnect to
the furnace must be properly labeled by the installer
in case emergency shutdown is required.
• A drip leg should be installed in the vertical pipe
run to the unit (Figure 10).
Table 7 (page 25) lists gas pipe capacities for standard
pipe sizes as a function of length in typical applications
based on nominal pressure drop in the line.
Table 8
(page 26) contains the orifi ce sizes and manifold pressure
at various altitudes for natural gas installations.
The furnace may be installed for either left or right side
gas entry. A typical gas service hookup is shown in Figure
10.
NOTE:
When connecting the gas supply, provide
clearance between the gas supply line and the entry hole
in the furnace casing to avoid unwanted noise and/or
damage to the furnace.
Leak Check
WARNING:
FIRE OR EXPLOSION HAZARD
Never test for gas leaks with an open fl ame.
Check all connections using a commercially
available soap solution. A fi re or explosion
may result causing property damage, personal
injury or loss of life. Failure to follow the safety
warnings exactly could result in serious injury,
death or property damage.
After the gas piping to the furnace is complete, all
connections must be tested for gas leaks. This includes
pipe connections at the main gas valve, emergency
shutoff valve and fl exible gas connectors (if applicable).
Apply the soap and water solution on each joint or union
using a small paintbrush. If any bubbling is observed,
the connection is not sealed adequately and must be
retightened. Repeat the tightening and soap check process
until bubbling ceases.
Содержание G7XA Series
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