GE 49-7419-2 Owner's Manual And Installation Instructions page 19

INSTALL THE DRAIN
2
An external or an internal drain must be attached to
the drain connector.
External Drain
Attach a 90° PVC elbow to the unit's female 3/4" NPT
drain connector. Use the other end of the elbow to
run a 3/4" Sch.40 PVC pipe through the knockout
holes of both the wall plenum and the architectural
louver to the outside. Seal the gap between the
plenum hole and PVC tube. See the Installation
Instructions in the RAVAL1.
Side View
Inside wall
Female drain
fitting
PVC
90° Elbow
Internal Drain
Attach PVC to the unit's female 3/4" NPT drain
connector. See the Installation Instructions in the
RAVAL1. Local codes may apply.
Side View
Inside wall
Female drain
fitting
PVC
(Internal drain)
Installation Instructions
" PVC
3 ⁄
4
(External drain)
"
3 ⁄
4
DUCTWORK
3
Prepare the closet ductwork for later connection to
the case.
The total flow rate (CFM) and external static pressure
(ESP) available can be estimated from the chart below.
Use these charts to select your fan speed setting. The
collar on top of the case accepts standard 10" duct.
Pull all duct tight. Extra duct slack can greatly increase
static pressure.
CAUTION: Flex duct can collapse and cause airflow
restrictions. Do not use flex duct for 90° bends or
unsupported runs of 5 ft. or more.
Airflow – CFM@230 Volts and @ 265 Volts
ESP
(in. water)
0.0
0.1
0.2
0.3
0.4
0.0
0.1
0.2
0.3
0.4
0.0
0.1
0.2
0.3
0.4
To correct for 208 volts: 0.91
Your airflow should be balanced based on many
factors, such as available ESP, room CFM, and
ductwork. Consult an HVAC engineer for proper
applications. External static pressure (ESP) can be
measured with a manometer or pitot tube. Once this
ESP is established, you can calculate the CFM using
the above chart.
CFM Recommendations
9,000 BTU
275 300 325
•
• = Recommended Mid Range
Higher CFMs tend to increase Sensible capacity,
enhance room circulation and increase duct noise,
while lower CFMs tend to increase Latent capacity
and reduce noise.
19
Indoor Fan CFM
DUCT SELECT SWITCH
UP DOWN
High Medium Medium
CFM CFM CFM
390 340 340
370 320 320
350 300 300
330 280 280
310 260 260
475 390 390
450 370 370
425 350 350
400 330 330
375 315 315
630 545 545
610 530 530
590 515 515
570 495 495
550 475 475
12,000 BTU 18,000 BTU
350 375 400 450 500
•
Low
CFM
305
290
270
250
230
350
325
300
275
250
490
480
470
455
440
550
•