4. All piping should be cleaned of dirt and scale by hammering
on the outside of the pipe and blowing out the loose dirt and
scale. Before initial start-up, be sure that all of the gas lines
external to the unit have been purged of air.
5. The gas supply should be a separate line and installed in
accordance with all safety codes as prescribed under “Limi-
tations”. After the gas connections have been completed,
open the main shut-off valve admitting normal gas pressure
to the mains. Check all joints for leaks with soap solution or
other material suitable for the purpose. NEVER USE A
FLAME.
6. The furnace and its individual manual shut-off valve must
be disconnected from the gas supply piping system during
any pressure testing of that system at test pressures in
excess of 1/2 psig (3.48 kPa).
The furnace must be isolated from the gas supply piping
system by closing its individual manual shut-off valve dur-
ing any pressure testing of the gas supply piping system at
test pressures equal to or less than 1/2 psig (3.48kPa).
FLUE VENT HOOD
The flue vent hood with screen is not shipped attached. This
hood must be installed to assure proper unit operation. The
hood must be fastened to the outside of the gas heat access
panel with the screws provided in the bag attached to the inside
of the combustion compartment.
The flue vent hood is installed by inserting the top flange of the
hood into the slotted opening in the access panel, positioning
the vent screen between the hood flanges and the access
panel, and securing in place using 2 screws.
FIG. 4 - FLUE VENT HOOD
MODELS
D3GH
018
024
030
036
EVAPORATOR
BLOWER
CENTRIFUGAL BLOWER (Dia. x Wd. in.)
9 x 6
10 x 8
10 x 8
10 x 10
FAN MOTOR HP (THREE SPEED)
1
⁄
3
1
⁄
3
1
⁄
3
1
⁄
2
EVAPORATOR
COIL
ROWS DEEP
3
3
3
3
FINS PER INCH
14
14
14
14
FACE AREA (Sq. Ft.)
4.3
4.3
4.3
4.3
CONDENSER
FAN
PROPELLER DIA. (in.)
18
18
18
18
FAN MOTOR HP
1
⁄
4
1
⁄
4
1
⁄
4
1
⁄
4
NOM. CFM TOTAL
2,000
2,000
2,200
2,400
CONDENSER
COIL
ROWS DEEP
1
2
2
2
FINS PER INCH
21
16
16
16
FACE AREA (Sq. Ft.)
11.7
11.7
11.7
11.7
CHARGE
REFRIGERANT 22 (lbs./oz.)
5/6
8/4
7/0
7/0
UNIT WEIGHT
lbs.
348
376
395
416
TABLE 6 - PHYSICAL DATA
MODEL
D3GH
POWER
SUPPLY
VOLTAGE
LIMITATIONS
(SEE NOTE 1)
COMPRESSOR
COND.
FAN
MOTOR,
FLA
SUPPLY
AIR
BLOWER
MOTOR,
FLA
TOTAL
UNIT
AMPACITY,
AMPS
MAX.
FUSE
SIZE,
(SEE NOTE 2)
AMPS
MAX.
HACR
BREAKER
SIZE,
AMPS
MIN.
WIRE
SIZE,
AWG
(SEE NOTE 3)
MIN.
MAX.
RLA
LRA
018
208/230-1-60
187
253
9.0
48.0
1.5
2.6
15.4
20
20
12
024
208/230-1-60
187
253
10.9
61.0
1.5
2.6
17.7
25
25
12
030
208/230-1-60
187
253
12.8
69.0
1.5
2.6
20.1
30
30
10
036
208/230-1-60
187
253
17.9
87.0
1.5
4.4
28.3
45
45
10
NOTES:
1. Utilization Range “A” in accordance with ARI Standard 110.
2. Dual element, time delay type.
3. Based on 75
°
C copper conductors.
TABLE 7 - ELECTRICAL DATA
GAS HEAT
ACCESS PANEL
VENT OUTLET
AIR HOOD
VENT OUTLET
SCREEN
530.44-N5Y
6
Unitary Products Group
