Factory-Option Thru-Base Connections (Gas Connections) - Carrier WeatherMaker Puron 48FC 04 Series Installation Instructions Manual

Table 3 — Natural Gas Supply Line Pressure Ranges
UNIT MODEL UNIT SIZE
48FCD/E/S/R 04, 05, 06, 07
48FCF/T
05, 06, 07
(High Heat Units Only)
Table 4 — Liquid Propane Supply Line Pressure
Ranges
UNIT MODEL UNIT SIZE
48FCD/E/S/R 04, 05, 06, 07
48FCF/T
05, 06, 07
(High Heat Units Only)
The gas supply pipe enters the unit at the burner access panel
on the front side of the unit, through the long slot at the bottom
of the access panel. The gas connection to the unit is made to
the 1 / -in. FPT gas inlet port on the unit gas valve.
2
Manifold pressure is factory-adjusted for natural gas fuel use.
Adjust as required to obtain best flame characteristics. See
Table 5.
Table 5 — Natural Gas Manifold Pressure Ranges
UNIT MODEL UNIT SIZE
48FCD/E/S/R 04, 05, 06, 07
48FCF/T
05, 06, 07
(High Heat Units Only)
NOTE: LOW FIRE, 1.7 in. wg (423 Pa), applies to the following three
phase voltage units only: 48FCE*04 and 48FCF*05/06/07.
Manifold pressure for LP fuel use must be adjusted to specified
range. Follow instructions in the accessory kit to make initial
readjustment, see Table 6.
Table 6 — Liquid Propane Manifold Pressure Ranges
UNIT MODEL UNIT SIZE
48FCD/E/S/R 04, 05, 06, 07
48FCF/T
(High Heat Units Only)
NOTE: LOW FIRE, 5.0 in. wg (1245 Pa), applies to the following three
phase voltage units only: 48FCE*04 and 48FCF*05/06/07.
CAUTION
EQUIPMENT DAMAGE
Failure to follow this caution may result in equipment damage.
When connecting the gas line to the unit gas valve, the in-
staller MUST use a backup wrench to prevent damage to
the valve.
Install a gas supply line that runs to the unit heating section.
Refer to the NFPA 54/NFGC or equivalent code for gas pipe
sizing data. Do not use a pipe size smaller than
the gas supply line to allow for a maximum pressure drop of
0.5-in. wg (124 Pa) between gas regulator source and unit gas
valve connection when unit is operating at high-fire flow rate.
The gas supply line can approach the unit in three ways: hori-
zontally from outside the unit (across the roof), thru-curb/under
unit basepan (accessory kit required), or through unit basepan
(factory option or accessory kit required). Consult accessory
kit installation instructions for details on these installation
methods. Observe clearance to gas line components per
Fig. 16.
MIN. MAX.
4.0 in. wg 13.0 in. wg
(996 Pa) (3240 Pa)
5.0 in. wg 13.0 in. wg
(1245 Pa) (3240 Pa)
MIN. MAX.
11.0 in. wg 13.0 in. wg
(2740 Pa) (3240 Pa)
11.0 in. wg 13.0 in. wg
(2740 Pa) (3240 Pa)
HIGH FIRE LOW FIRE
3.5 in. wg SEE NOTE
(872 Pa) BELOW
3.5 in. wg SEE NOTE
(872 Pa) BELOW
HIGH FIRE LOW FIRE
10 in. wg SEE NOTE
(2490 Pa) BELOW
10 in. wg SEE NOTE
05, 06, 07
(2490 Pa) BELOW
1 / -inch. Size
2
9" MINIMUM CLEARANCE
FOR PANEL REMOVAL
BASE UNIT
BASE RAIL
ROOF
CURB
FROM
GAS
METER
LEGEND
National Fuel Gas
NFGC —
Code
STEEL PIPE
NOMINAL DIAMETERS (IN.)
1 /
2
3 / or 1
4
1
1 / or larger
4
Fig. 16 — Gas Piping Guide
(with Accessory Thru-the-Curb Service Connections)
FACTORY-OPTION THRU-BASE CONNECTIONS (GAS
CONNECTIONS)
This service connection kit consists of a
fitting (brass), a 1 / -in. electrical bulkhead connector and a
2
electrical bulkhead connector, all factory-installed in the em-
bossed (raised) section of the unit basepan in the condenser sec-
tion. See Fig. 17.
HIGH VOLTAGE
CONDUIT
CONNECTOR
AUXILIARY
POWER
SUPPLY
(OPTIONAL)
Fig. 17 — Thru-Base Gas Connection Fittings
The thru-base gas connector has male and female threads. The
male threads protrude above the basepan of the unit; the female
threads protrude below the basepan.
Check tightness of connector lock nuts before connecting gas
piping.
Install a 1 / -in. NPT street elbow on the thru-base gas fitting.
2
Attach a / -in. pipe nipple with minimum length of 16-in.
1
2
(406 mm) (field-supplied) to the street elbow and extend it
through the access panel at the gas support bracket. See
Fig. 18.
13
X
GAS
*
REGULATOR
MANUAL GAS
SHUTOFF VALVE *
48" MINIMUM
DRIP LEG
*
PER NFGC
FIELD-FABRICATED
SUPPORT *
*Field supplied.
NOTE: Follow all local codes.
SPACING OF SUPPORTS
X DIMENSION (FT)
6
8
10
1 / -in. NPT gas adapter
2
BRASS FITTING FOR
3 TO 6 TON UNITS
LOW VOLTAGE
CONDUIT
CONNECTOR
3 / -in.
4