Gas Piping - Carrier 58UHV Installation, Start-Up, And Operating Instructions Manual

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
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.
‡ External side filter rack must be used for upflow right-side return.
"
5
⁄
16
5
⁄
"
3
1 ⁄
4
"
5
⁄
16
"
3
1 ⁄
4
3
1 ⁄
4
Fig. 9—Leveling Leg Installation
NOTE: The length of the bolt should not exceed 1-1/2 in.
1. Lay furnace on its back. Locate and drill 5/16-in. diameter
hole in each bottom corner of furnace as shown in Fig. 9.
2. Install nut on bolt and install bolt with nut in hole. (Install flat
washer if desired.)
3. Install another nut on other side of furnace base. (Install flat
washer if desired.)
4. Adjust outside nut to provide desired height and tighten inside
nut to secure arrangement.
Step 6—Gas Piping
Emissions control devices located at the heat exchanger inlets
MUST be removed for propane installations (Refer to gas
conversion kit for instructions).
Gas piping must be installed in accordance with national and local
codes. Refer to the NFGC in U.S. Canadian installations must be
installed in accordance with NSCNGPIC and all authorities having
jurisdiction.
FILTER
TYPE
Bottom Return
"
16
"
3
1 ⁄
4
"
5
⁄
16
"
A89014
If a flexible connector is required or allowed by the authority
having jurisdiction, black iron pipe shall be installed at the
furnace gas control valve and extend a minimum of 2 in.
outside the furnace casing. A failure to follow this warning
could result in fire, personal injury, or death.
The gas supply line should be a separate line running directly from
the gas meter to the furnace, if possible. Refer to Table 4 for the
recommended gas pipe size. Risers must be used to connect to the
furnace and the meter.
Piping should be pressure tested in accordance with local and
national plumbing and gas codes BEFORE the furnace has been
attached. If the test 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), close the manual shutoff valve before the test.
(See Fig. 10.) 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. 10.)
GAS
SUPPLY
MANUAL
SHUTOFF
VALVE
(REQUIRED)
SEDIMENT
TRAP
UNION
Fig. 10—Typical Gas Pipe Arrangement
Table 4—Maximum Capacity of Pipe*
NOMINAL INTERNAL
IRON PIPE DIAMETER
SIZE (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
supply line pressure drop of 0.5-in. wc (based on a 0.60 specific gravity gas).
Ref: Table 10-2, NFGC.
8
A89417
LENGTH OF PIPE (FT)
10 20 30 40
175 120 97 82
360 250 200 170
680 465 375 320
1400 950 770 660
2100 1460 1180 990
50
73
151
285
580
900