Bryant Legacy 674D, Installation Instructions Manual

Page: 9 / 56

9
FIRE OR EXPLOSION HAZARD
Failure to follow this warning could result in personal injury,
death and/or property damage.
--Connect gas pipe to unit using a backup wrench to avoid
damaging gas controls.
--Never purge a gas line into a combustion chamber. Never
test for gas leaks with an open flame. Use a commercially
available soap solution made specifically for the detection of
leaks to check all connections.
--Use proper length of pipe to avoid stress on gas control
manifold.
--If a flexible connector is required or allowed by authority
having jurisdiction, black iron pipe shall be installed at
furnace gas valve and extend a minimum of 2 in. (51 mm)
outside furnace casing.
--If codes allow a flexible connector, always use a new
connector. Do not use a connector which has previously
serviced another gas appliance.
!
WARNING
8. Check for gas leaks at the field--installed and
factory--installed gas lines after all piping connections have
been completed. Use a commercially available soap solution
made specifically for the detection of leaks (or method
specified by local codes and/or regulations).
OUT
TEE
NIPPLE
CAP
IN
C99020
Fig. 7 -- Sediment Trap
Table 1 – Physical Data -- Unit 674D----A
UNIT SIZE 674D--- ---A 24040 24060 30040 30060 36060 36090 42060 42090
NOMINAL CAPACITY ---ton 2 2 2---1/2 2---1/2 3 3 3---1/2 3---1/2
SHIPPING WEIGHT ---lb.
(kg)
359
163
359
163
373
169
373
169
379
172
379
172
461
209
461
209
COMPRESSORS Scroll
Quantity 1
REFRIGERANT (R---410A)
Quantity ---lb
(kg)
8.3
3.8
8.3
3.8
10.2
4.6
10.2
4.6
7.9
3.6
7.9
3.6
10.0
4.5
10.0
4.5
REFRIGERANT METERING
DEVICE
Indoor---TXV, Outdoor---Accurater
OUTDOOR ORIFICE
in. (qty)
(mm)
0.032 (2)
.81
0.035 (2)
.89
0.037 (2)
.94
0.038 (Left)
0.040(Right)
.97/1.02
OUTDOOR COIL
Rows...Fins/in.
Face Area---sq ft
2...21
11.9
2...21
11.9
2...21
11.9
2...21
11.9
2...21
11.9
2...21
11.9
2...21
13.6
2...21
13.6
OUTDOOR FAN
Nominal Cfm
Diameter---in.
(mm)
Motor Hp (Rpm)
2000
24
610
1/5 (810)
2000
24
610
1/5 (810)
2700
24
610
1/5 (810)
2700
24
610
1/5 (810)
2700
24
610
1/5 (810)
2700
24
610
1/5 (810)
3100
26
660
1/5 (810)
3100
26
660
1/5 (810)
INDOOR COIL
Rows...Fins/in.
Face Area---sq ft
3...17
3.7
3...17
3.7
3...17
3.7
3...17
3.7
3...17
3.7
3...17
3.7
3...17
4.7
3...17
4.7
INDOOR BLOWER
Nominal Cooling Airflow---(CFM)
Size---in.
(mm)
Motor ---hp
800
10x10
254x254
1/2
800
10x10
254x254
1/2
1000
10x10
254x254
1/2
1000
10x10
254x254
1/2
1200
11x10
279x254
3/4
1200
11x10
279x254
3/4
1400
11x10
279x254
3/4
1400
11x10
279x254
3/4
FURNACE SECTION*
Burner Orifice
Natural Gas Qty...Drill Size (Factory Installed)
Propane GasQty...Drill Size
2...44
2...55
2...38
2...53
2...44
2...55
2...38
2...53
2...38
2...53
3...38
3...53
2...38
2...53
3...38
3...53
HIGH---PRESSURE SWITCH
(psig) Cut---out
Reset (Auto)
650 +/---15
420 +/---25
LOSS---OF---CHARGE /
LOW---PRESSURE SWITCH
(Liquid Line) (psig)
Cut---out
Reset (auto)
20 +/---5
45 +/---10
RETURN---AIR FILTERS †
}
Throwaway (in.)
(mm)
20x20x1
508x508x25
20x24x1
508x610x25
24x30x1
610x762x25
*Based on altitude of 0 to 2000 ft (0---610 m).
{
Required filter sizes shown are based on the larger of the AHRI (Air Conditioning, Heating and Refrigeration Institute) rated cooling airflow or the heating airflow
velocity of 300 ft/minute for high---capacity type. Air filter pressure drop for non---standard filters must not exceed 0.08 IN. W.C.
}
If using accessory filter rack refer to filter rack installation instructions for correct filter size and quantity.
674D
--
--
A