GE Zoneline 7500 Serie Manuel Du Propriétaire Et Instructions D'installation page 19

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2
INSTALL THE DRAIN(S)
An external or an internal drain must be attached
to the primary drain connector. A secondary drain
is supplied if required by state and local codes. Refer
to the local codes for proper installation of the drains.
If the secondary drain is not used, seal its drain port
with a 3/4" MNPT plug.
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
"
3
4
PVC
(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:
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
275 300 325 350 375 400 450 500 550
• = 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
Flex duct can collapse and
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
Low
CFM
305
290
270
250
230
350
325
300
275
250
490
480
470
455
440

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