12
Table 3 — Natural Gas Supply Line Pressure Ranges
Table 4 — Liquid Propane Supply Line Pressure
Ranges
The gas supply pipe enters the unit at the burner access pan-
el on the front side of the unit, through the long slot at the bot-
tom of the access panel. The gas connection to the unit is made
to the
1
/
2
-in. FPT gas inlet port on the unit gas valve.
Manifold pressure is factory-adjusted for NG fuel use. Ad-
just as required to obtain best flame characteristics. See Table 5
for ranges.
Table 5 — Natural Gas Manifold Pressure Ranges
Manifold pressure for LP fuel use must be adjusted to spec-
ified range, see Table 6. Follow instructions in the accessory kit
to make initial readjustment.
Table 6 — Liquid Propane Manifold Pressure Ranges
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
1
/
2
-in. Size 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:
horizontally 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 ac-
cessory kit installation instructions for details on these installa-
tion methods. Observe clearance to gas line components per
Fig. 14 — Gas Piping Guide (with Accessory Thru-the-
Curb Service Connections)
FACTORY-OPTION THRU-BASE CONNECTIONS
(GAS CONNECTIONS) —
This service connection kit
consists of a
1
/
2
-in. NPT gas adapter fitting (brass), a
1
/
2
-in.
electrical bulkhead connector and a
3
/
4
-in. electrical bulkhead
connector, all factory-installed in the embossed (raised) section
of the unit basepan in the condenser section. See Fig. 15.
Fig. 15 — Thru-Base 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
/
2
-in. NPT street elbow on the thru-base gas fitting.
Attach a
1
/
2
-in. pipe nipple with minimum length of 16-in.
(406 mm) (field-supplied) to the street elbow and extend it
through the access panel at the gas support bracket. See Fig. 16.
UNIT MODEL
UNIT SIZE
MIN.
MAX.
580J*
04, 05, 06, 07
4.0 in. wg
(996 Pa)
13.0 in. wg
(3240 Pa)
UNIT MODEL
UNIT SIZE
MIN.
MAX.
580J*
04, 05, 06, 07
11.0 in. wg
(2740 Pa)
13.0 in. wg
(3240 Pa)
UNIT MODEL
UNIT SIZE
HIGH
FIRE.
LOW FIRE
580J*
04, 05, 06, 07
3.5 in. wg
(872 Pa)
1.7 in. wg
(423 Pa)
UNIT MODEL
UNIT SIZE
HIGH
FIRE.
LOW FIRE
580J*
04, 05, 06, 07
10.0 in. wg
(2490 Pa)
5.0 in. wg
(1245 Pa)
CAUTION
Failure to follow this caution may result in damage to
equipment.
When connecting the gas line to the unit gas valve, the
installer MUST use a backup wrench to prevent damage to
the valve.
LEGEND
* Field-Supplied.
STEEL PIPE NOMINAL
DIAMETER (in.)
SPACING OF SUPPORTS X
DIMENSIONS (FT)
1
/
2
6
3
/
4
or 1
8
1
1
/
4
or larger
10
NFGC —
National Fuel Gas Code
X
BASE UNIT
BASE RAIL
ROOF
CURB
9” MINIMUM CLEARANCE
FOR PANEL REMOVAL
MANUAL GAS
SHUTOFF VALVE
*
GAS
REGULATOR
*
48” MINIMUM
DRIP LEG
PER NFGC
*
FIELD-FABRICATED
SUPPORT
*
FROM
GAS
METER
LOW VOLTAGE
CONDUIT
CONNECTOR
HIGH VOLTAGE
CONDUIT
CONNECTOR
BRA
SS
FITTING FOR
3
TO 6 TON UNIT
S
.
Содержание 580J*04A
Страница 4: ...4 Fig 2 Unit Dimensional Drawing ...
Страница 5: ...5 Fig 2 Unit Dimensional Drawing cont ...
Страница 21: ...21 Fig 34 580J Size 07 Unit with Perfect Humidity Dehumidification System Humidistat Wiring ...
Страница 37: ...37 Fig 43 Typical RTU Open System Control Wiring Diagram ...
Страница 38: ...38 Fig 44 Typical RTU Open System Control Wiring Diagram with Perfect Humidity ...
Страница 49: ......
