5
NO TES:
1. Minimum retur n-air openings at fur nace , based on metal duct. If fle x duct is used,
see fle x duct manuf acturerí s recommendations f or equiv alent diameters .
2. Minimum retur n-air opening at fur nace:
a. F or 800 CFM–16-in. (406mm) round or 14
1
/
2
(368 mm)x 12-in. (305 mm) rectangle
.
b. F or 1200 CFM–20-in. (508mm) round or 14
1
/
2
(368mm)x 19
1
/
2
-in. (495mm) rectangle
.
c. F or 1600 CFM–22-in. (559mm) round or 14
1
/
2
(368mm)x 23
1
/
4
-in. (591mm) rectangle
.
d. F or airflo w requirements abo v e 1800 CFM, see Air Deliv er y tab le in Product Data
literature f or specific use of single side inlets . The use of both side inlets , a
combination of 1 side and the bottom, or the bottom only will ensure adequate
retur n air openings f or airflo w requirements abo v e 1800 CFM .
17
5
⁄
16
"
24
1
⁄
2
"
27
9
⁄
16
"
TYP
27
5
⁄
8
"
29
11
⁄
16
"
TYP
30
13
⁄
16
"
32
5
⁄
8
"
TYP
33
1
⁄
4
"
TYP
CONDENSA TE
DRAIN TRAP
LOCA TION
(AL TERNA TE
UPFL OW )
7
⁄
8
-IN . DI A (22mm)
A CCESSOR Y
PO WER ENT RY
7
⁄
8
-IN . DI A (22mm)
PO WER CONN
CONDENSA TE DRAI N
TRAP LOCA TION
(DO WNFLO W &
HORIZONT AL LEFT )
26
15
⁄
16
"
24
1
⁄
2
"
22
5
⁄
16
"
2-IN . (51 mm) COMBUSTION-
AIR CONN
1
⁄
2
-IN . (13mm) DI A
GAS CONN
2-IN (51mm)
.
VENT CONN
1
⁄
2
-IN . DIA (13mm)
THERMOST AT ENT RY
22
11
⁄
16
"
SIDE INLE T
23
1
⁄
4
"
TYP
SIDE INLE T
1
1
⁄
4
"
1
"
OUTLET
26
15
⁄
16
"
28
1
⁄
2
"
22
5
⁄
16
"
19
"
13
⁄
16
"
5
⁄
8
"
5
⁄
16
"
1
"
39
7
⁄
8
"
22
1
⁄
4
"
TYP
11
⁄
16
"
7
⁄
16
"
24
3
⁄
16
"
BO TT OM INLE T
18
1
⁄
4
"
22
11
⁄
16
"
2-IN . (51mm)
COMBUSTION-AIR CONN
1
⁄
2
-IN . DI A (13mm)
GAS CONN
7
⁄
8
-IN . DI A (22mm)
PO WER CONN
1
⁄
2
-IN . DI A (13 mm)
THERMOS TA T ENTR Y
2-IN . (51 mm)
VENT CONN
DIMPLE LOCA T ORS
FOR HORIZONT AL
HANGING
14
1
⁄
2
"
TYP
SIDE INLE T
9
7
⁄
16
"
TYP
26
15
⁄
16
"
TYP
CONDENSA TE
DRAIN LOCA TIO N
(UPFLO W)
30
1
⁄
2
"
9
⁄
16
"
TYP
CONDENSA TE
DRAIN LOCA TION
(UPFL OW )
E
INLE T
11
/
16
"
11
/
16
"
D
13
/
16
"
13
/
16
"
OUTLET
A
AIRFL OW
26
1
⁄
4
"
26
1
⁄
4
"
CONDENSA TE DRAI N
TRAP LOCA TION
(DO WNFL OW &
HORIZONT AL RIGHT)
OR AL TERNA TE
1
⁄
2
-IN . DIA GAS CONN
(684 mm)
(667 mm)
(622 mm)
(567 mm)
(368 mm)
(32 mm)
(25mm)
(591 mm)
(684 mm)
(240 mm)
(439 mm)
(622 mm)
(700 mm)
(702 mm)
(754 mm)
(783 mm)
(829 mm)
(845 mm)
(21 mm)
(17 mm)
(17 mm)
(21 mm)
(775 mm)
(464 mm)
(14 mm)
(614 mm)
(565 mm)
(576 mm)
(483 mm)
(567 mm)
(667 mm)
(684 mm)
(724 mm)
(21 mm)
(16 mm)
(16 mm)
(1013 mm)
(25 mm)
(11 mm)
(25 mm)
(576 mm)
A05124
Dimensions -- In. (mm)
UNIT SIZE
A
D
E
060---14 / 042060
17---1/2 / 445
15---7/8 / 403
16 / 406
080---14 / 042080
21 / 533
19---3/8 / 492
19---1/2 / 495
080---20 / 060080
21 / 533
19---3/8 / 492
19---1/2 / 495
100---20 / 060100
21 / 533
19---3/8 / 492
19---1/2 / 495
120---20 / 060120
24---1/2 / 622
22---7/8 / 581
23 / 584
Fig. 2 -- Dimensional Drawing
A gas--fired furnace for installation in a residential garage must be
installed as specified in the Hazardous Locations section of these
instructions and Fig. 5.
The furnace may be used for construction heat provided that the
furnace installation and operation complies with the first
CAUTION in the LOCATION section of these instructions.
This gas furnace may be used for construction heat provided that:
S
The furnace is permanently installed with all electrical wiring,
piping, air filters, venting and ducting installed according to
these installation instructions. A return air duct is provided,
sealed to the furnace casing, and terminated outside the space
containing the furnace. This prevents a negative pressure
condition as created by the circulating air blower, causing a
flame rollout and/or drawing combustion products into the
structure.
S
The furnace is controlled by a thermostat. It may not be “hot
wired” to provide heat continuously to the structure without
thermostatic control.
S
Clean outside air is provided for combustion. This is to
minimize the corrosive effects of adhesives, sealers and other
construction materials. It also prevents the entrainment of
drywall dust into combustion air, which can cause fouling and
plugging of furnace components.
S
The temperature of the return air to the furnace is maintained
between 55
_
F (13
_
C) and 80
_
F (27
_
C), with no evening
setback or shutdown. The use of the furnace while the structure
is under construction is deemed to be intermittent operation per
our installation instructions.
S
The air temperature rise is within the rated rise range on the
furnace rating plate, and the firing rate has been set to the
nameplate value.
S
The filters used to clean the circulating air during the
construction process must be either changed or thoroughly
cleaned prior to occupancy.
S
The furnace, ductwork and filters are cleaned as necessary to
remove drywall dust and construction debris from all HVAC
system components after construction is completed.
S
After construction is complete, verify furnace operating
conditions including ignition, input rate, temperature rise and
venting, according to the manufacturer’s instructions.
355B
A
V
