Gas Piping - Carrier weathermaker 8000 Installation, Start-Up And Operator's Manual

1
17 ⁄ -IN. WIDE
2
CASINGS ONLY:
INSTALL FIELD-SUPPLIED
FILTER FILLER STRIP
UNDER FILTER.
3 "
"
1
24 /
2
1 "
FILTER
SUPPORT
Fig. 5—Bottom Filter Arrangement
(Control Removed for Clarity)
Table 3—Filter Information (In.)
FILTER SIZE*
FURNACE
CASING WIDTH
Side Return
14-3/16 (1) 16 X 25 X 1† (1) 14 X 25 X 1 Cleanable
17-1/2 (1) 16 X 25 X 1† (1) 16 X 25 X 1 Cleanable
21 (1) 16 X 25 X 1 (1) 20 X 25 X 1† Cleanable
24-1/2 (2) 16 X 25 X 1† (1) 24 X 25 X 1 Cleanable
* Filters can be field modified by cutting the frame as marked and folding to the
desired size. Alternate sizes can be ordered from your distributor or dealer.
† Factory provided with the furnace.
4. Adjust outside nut to provide desired height, and tighten inside
nut to secure arrangement.
Step 5—Gas Piping
Gas piping must be installed in accordance with national and local
codes. Refer to the current edition of the NFGC. Canadian
installations must be installed in accordance with NSCNGPIC and
all authorities having jurisdiction.
Refer to Table 4 for the recommended gas pipe size. Risers must
be used to connect to the furnace and the meter.
1
24 ⁄ -IN. WIDE
2
CASINGS ONLY:
CUT AND FOLD
FACTORY-PROVIDED
FILTERS AS SHOWN
TO DESIRED SIZE.
WASHABLE
FILTER
FILTER
RETAINER
A96030
FILTER
TYPE
Bottom Return
"
5
⁄
16
"
3
1 ⁄
4
"
5
⁄
16
1
Fig. 6—Leveling Leg Installation
If a flexible connector is required or allowed by the authority
having jurisdiction, black iron pipe shall be installed at the
gas valve and extend a minimum of 2 in. outside the furnace
casing.
Table 4—Maximum Capacity of Pipe*
NOMINAL IRON INTERNAL
PIPE SIZE DIAMETER
(IN.) (IN.)
1/2 0.622
3/4 0.824
1 1.049
1-1/4 1.380
1-1/2 1.610
* Cubic ft of gas per hr for gas pressures of 0.5 psig (14-in. wc) or less, and a
pressure drop of 0.5-in. wc (based on a 0.60 specific gravity gas). Ref: Table
10-2 NFPA 54-1992.
Piping should be pressure tested in accordance with local and
national plumbing and gas codes before the furnace has been
attached. If the pressure exceeds 0.5 psig (14-in. wc), the gas
supply pipe must be disconnected from the furnace and capped
before the pressure test. If the test pressure is equal to or less than
0.5 psig (14-in. wc), turn off electric shutoff switch located on the
gas valve before the test. It is recommended that the ground joint
union be loosened before pressure testing. After all connections
have been made, purge the lines and check for leakage with
regulated gas supply pressure.
Install a sediment trap in the riser leading to the furnace. The trap
can be installed by connecting a tee to the riser leading from the
furnace. Connect a capped nipple into the lower end of the tee. The
capped nipple should extend below the level of the gas controls.
(See Fig. 7.)
Apply joint compound (pipe dope) sparingly and only to the male
threads of each joint. The compound must be resistant to the action
of propane gas.
6
"
5
⁄
16
"
3
1 ⁄
4
"
5
⁄
16
"
3
⁄
4
"
3
1 ⁄
4
LENGTH OF PIPE (FT)
10 20 30
175 120 97
360 250 200
680 465 375
1400 950 770
2100 1460 1180 990 900
A89014
40 50
82 73
170 151
320 285
660 580