User`s manual
TaNe 2--Physicam Data--Unit 48GX
UNiT BBZE 48GX 024040 024000 030040 030000 030060 036090 042060 042090
NOMINAL CAPACITY (ton) 2 2 2"½ 2_½ 3 3 3½ 3½
OPERATING WEIGHT (lb.) 290 290 313 313 321 321 382 382
COMPRESSORS Scroll
Quantity 1
REFRmGERANT (R-22) 3.7 3.7 4.4 4.4 5.2 5.2 6.4 6.4
Quantity (_b.)
RBFRBGERANT METERBNG DEVICE
.034 .034 .030 .030 .032 .032 .034 .034
Orifice ID (in.}
CONDENSER COBL
1._17 1._17 1_.17 1...17 2...I7 2...17 2...17 2._17
Rows...Fins/in.
10.8 10.8 12.7 12.7 9.1 9.1 12.3 12.3
Face Area (sq ft}
CONDENSER FAN
2350 2350 2350 2350 2350 2350 3300 3300
Nominal Cfm
22 22 22 22 22 22 22 22
Diameter (in.)
Motor Bp (Rpm) 1/8 (825) 1/8 (825) 1/8 (825) 1/8 (825) 1/8 (825) 1/8 (825) 1/8 (825) 1/8 (825)
EVAPORATOR COIL
3...15 3_.15 3._15 3._15 3._15 3...15 3_.15 3_.15
Rows...Fins/in.
3.1 3.1 3.1 3.1 3.7 3.7 4.7 4.7
Face Area (sq ft}
EVAPORATOR BLOWER
800 800 1000 1000 1200 1200 1400 1400
Nominal Airflow (Cfm) 10X10 10X10 10X10 10X10 11X10 11X10 11X10 11X10
Size (in.)
Motor Hp {Rpm) 1/4 (1075) 1/4 (1075) 1/4 (1075) 1/4 (1075) 1/2 (1075) 1/2 (1075) 3/4 (1075) 3/4 (1075)
FURNACE SECTION*
Burner Orifice No. (Qty...DriH Size) 2...44 2_.38 2_.44 2...38 2...38 3...38 2...38 3_.38
NaturN Gas
2...50 2...46 2...50 2...46 2...46 3...46 2...46 3...46
Burner Orifice No. (Qty...DriH Size)
Propane Gas
R_:TURN-ABR FBLTERS (Jn.)t 20 X 20 20 X 20 20 X 20 20 X 20 20 X 24 20 X 24 24 X 30 24 X 30
Throwaway
* Based on altitude of Oto 2000 ft
? Required filter sizes shown are based on the larger of the ARI (Air Conditioning and Refrigeration Institute) rated cooling airflow or the heating airflow velocity of 300
if/minute for high-capacity type Air filter pressure drop for non-standard fitters must not exceed 008 in wg.
unit is operating. For propane applications, the gas pressure must
not be less than 7.0 in wg oi" greater than 13 in wg at the unit
connection
An 1/8-in. NPT plugged tapping, accessible fbr test gage conneco
tiom must be installed immediately upstream of the gas supply
connection to the gas valve.
When installing the gas supply line, obsel_'e local codes pertaining
to gas pipe installations. Ref)r to the NFGC ANSI Z223J-1988
NFPA latest edition (in Canada, (ANiCGA B 14% 1, (2)-M86). In
the absence of local building codes, adhere to the fbltowing
pertinent recommendations:
1. Avoid low spots in long runs of pipe. Grade all pipe 1/4 in. in
ever?" 15 ft to prevent traps. Grade all horizontal runs
downward to risers. Use risers to connect to heating section
and to meter.
2. Protect all segments of piping system against physical and
thermal damage. Support all piping with appropriate straps,
hangers, etc. Use a mininmm of one hanger eve N- 6 ft. For
pipe sizes larger d_an 1/2 in., fbltow recommendations of
national codes.
3. Apply joint compound (pipe dope) sparingly and only to male
threads of joint when making pipe connections. Use only pipe
dope that is resistant to action of liquefied petroleum gases as
specified by local and/or national codes. :\;ever zz.se 7;e_7ot_
tope.
4. Install sediment trap in riser leading to heating section (See
Fig. 9). This &ip leg Nnctions as a trap fbr dirt and
condensate.
5. Install an accessible, external, manual main shutoff valve in
gas supply pipe within 6 ff of heating section.
6. Install groundojoint union close to heating section between
unit manual shutoff and external manual main shut-off valve.
? Pressure-test all gas piping in accordance witla local and
national plumbing and gas codes before connecting piping to
unit,
NOTI::: Pressure test the gas supply system qfter the gas supply
piping is connected to the gas valve. The supply piping must be
disconnected f?om the gas valve during the testing of the piping
systems when test pressure is in excess of 0.5 psig. Pressure test
the gas supply piping system at pressures equal to or less than 0.5
psig. The unit heating section must be isolated fi'om the gas piping
system by closing the external main manual shutoff valve and
slightly opening the ground-joint union.
Unstable operation may occur when the gas valve and
manifbld assembly are forced out of position while connect-
ing improperlyorouted rigid gas piping to the gas valve. Use
a baclcup wrench when making connection to avoid stlain on,
or distortion of, the gas contIol piping.
If a flexible conductor is required or allowed by the authority
having jurisdictiom black iron pipe shall be installed at the
gas valve and shall extend a nlinirnurn of 2 in. outside the unit
casing.