Nortek FG7SC, Руководство по установке

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Optional PVC Pipe Installation
When running the 2” PVC pipe out through the top of the
*SD upflow furnace, there may be possible clearance issues
when transitioning the PVC pipe from 2” to 3”:
• If the size of the PVC flue needs to be increased from 2”
to 3”, two, 2” x 45° PVC elbows may be used to achieve
the clearances needed between the coil box and the 2” x
3” coupling. See
Figure 21 (page 18)
.
• Install the 2” x 3” coupling in the vertical run only. If the
coupling is installed horizontally, it will allow water to build
up inside the furnace and cause a lock out condition.
• To avoid the clearance issue, it is recommended that the
furnace be vented through the left side or the right side of
the cabinet.
Condensate Drain Lines
If the furnace is installed in an area where temperatures
fall below freezing, special precautions must be made
for insulating condensate drain lines that drain to the
outdoors. If condensate freezes in the lines, this will
cause improper operation or damage to the furnace. It
is recommended that all drain lines on the outside of
the residence be wrapped with an industry approved
insulation or material allowed by local code.
• The method for disposing condensate varies according to
local codes. Consult your local code or authority having
jurisdiction.
• The condensate drain line must be trapped using a kit
(P/N- 922485) or field supplied parts. After the drain trap,
condensate can continue to the drain by connecting to a
recommended 3/4” ID minimum drain line, but no smaller
than the original tubing ID supplied by the manufacturer.
The drain line should slope downward away from the
furnace to ensure proper drainage.
• The placement of the condensate drain lines will depend
on the configuration selected in Table 4 (page 16) . The
drain lines can be routed out the left or right side of the
furnace, but must maintain a downward slope to ensure
proper condensate drainage. The J-trap may need to be
rotated to the side that matches your setup.
For *SC & *SL series, see
Figure 39 (page 41) Figure
40 (page 42) , Figure 41 (page 43) , & Figure 42 (page
44) . For *SD & *SM series, see Figure 44 (page 46)
Figure 45 (page 47)
, &
Figure 46 (page 48)
. To rotate
the J-trap, loosen the clamp on the drain tube, rotate the
J-trap to either side, and retighten the clamp.
• It is permissible to locate the trap away from the
furnace. The condensate drain system (J-trap and drain
tube) should be no more than 30 equivalent feet while
maintaining 1/4” per foot slope, and insulated if located in
an unconditioned space.
THREE GENERAL PRINCIPLES APPLY:
• Each condensate drain must be trapped separately using
a J-Trap or field supplied loop. After individually trapping
the condensate lines, it is acceptable to combine the
drains.
• There must always be a drain attached to the collector at
the outlet of the secondary heat exchanger.
• There must always be a drain at the lowest point of the
venting system.
NOTE:
If using a condensate pump, the
furnace drain line must be installed above the pumps
water line.
Figure 22. Bottom Panel Removal
Bottom
Panel
Front
Brace
Door
Blower
Plug
Screws
Blower
Assembly
Screws
EXCEPTIONS & CLARIFICATIONS TO THE
GENERAL RULES:
• If the vent exits the furnace horizontally, the vent may be
turned vertically with a tee. The drip leg formed by the
tee must include a drain. (Option 2, Option 3, Option
5, Option 6, Option 8, Option 9, Option 12, Option 13,
Option 16, Option 17, Option 19, Option 20, Option 21,
Option 23, Option 24, Option 31, Option 32, & Option 34)
• In certain cases, it is permitted to drain the inducer back
into the top drain of the collector.
This drain must not
sag in the middle.
(Option 2, Option 5, Option 7, Option
11, Option 15, Option 16, Option 18, Option 19, Option
21, Option 23, Option 25, Option 27, Option 29, Option
30, Option 32, & Option 33)
Bottom Panel Removal
The steps listed below describe how to remove the bottom
panel from the furnace. See
Figure 22
.
1. Remove the door from the blower compartment.
2. Disconnect the wires from the blower motor plug.
3. Remove two screws securing the blower assembly to the
furnace.
4. Carefully pull the blower assembly out thru the front of the
furnace.
5. Remove all screws securing bottom panel to bottom of
furnace and front brace.
6. Lift up and slide bottom panel out through front of furnace.
7. Reinstall the blower assembly in reverse order.
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 23 .
1. Remove the door from the blower compartment .
2. Remove all screws securing the bottom panel to the front
brace.
3. Remove two screws securing the furnace cabinet to the
blower deck.
4. Remove all screws securing the furnace cabinet to the
bottom panel.
5. Remove the screw securing the bottom corner of the
furnace cabinet to the front brace.
6. Carefully spread the bottom corner of the furnace cabinet
outwards while sliding the bottom panel out through the
front of the furnace.
7. Reassemble the furnace in reverse order.