Broan NORTRON D Serie Mode D'emploi page 3

GENERAL REQUIREMENTS AND SPECIFICATIONS
MODEL NO. KW
21D10 10
21D15 15
21D18 18
21D20 20
21D23 22.5
21D25 25
21D27 27
*FACTORY SETTINGS.
SUBJECT TO CHANGE WITHOUT NOTICE.
OPERATING OPTIONS
The furnace is shipped from the factory in a "Standard Heating
Mode" (narrow switches in the Down position, wide switch in the
Middle — or Off — position). When the thermostat calls for heat,
the automatic controls will be activated and the furnace turns
"ON".
The blower will run at low speed or higher speed (as selected by
Speed Selector switch).
H
IGH
L
OW
S S
PEED ELECTOR
The Speed Selector switch is used to
control the fan speed. It is also used in
conjunction with the Continuous Speed
switch.
"Low" – The blower motor will operate at
low speed.
"High" – The blower motor will operate at
a higher speed.
All manuals and user guides at all-guides.com
240 VOLTS – SINGLE PHASE
BTUH AMPS INCL. MOTOR
34120 46
51180 67
61420 77
68240 86
76842 94
85003 107
92130 116
10" x 8" (254 mm x 203 mm) BLOWER
SPEED FLOW RATE
CFM
LOW**
L/s
CFM
MED-LOW
L/s
CFM
MED-HIGH
L/s
CFM
HIGH
L/s
WARNING:
**This speed can only be run with heater off, for cooling/ventilation purposes only.
During spring or fall, you may require less
rapid response when the thermostat calls
for heat.
When "Mild" is selected, it takes more time
to bring all the elements online.
When "Cold" is selected, the heating
elements come online faster.
( ' )
CONT D
HP BLOWER
1/3
1/3
1/3
10" x 8"
(254 mm x 203 mm)
1/3
1/3
1/3
12" x 8"
3/4
(304 mm x 203 mm)
STATIC PRESSURE
(INCHES OF WATER COLUMN)
0.2 0.3 0.4
756 749 740
357 353 349
1035 1018 997
488 480 470
1177 1157 1132
556 546 534
1301 1276 1247
614 602 588
As the furnace heats up, it automatically switches to a medium
speed when additional elements are activated by the electronic
control, if it was initially set to run at low speed. The timing of this
blower speed change will depend on whether "Cold" or "Mild" is
selected on the Season Select switch.
You may, however, change from the Standard Heating Mode by
using the controls built into your furnace.
M
ILD
C
OLD
S S
EASON ELECT
3
TEMP. RISE @ 0.20 IN. W.C.
°C °F *SPEED RPM
21 70 MED-LOW 814
24 25 MED-LOW 814
27 81 MED-LOW 814
33 91 MED-LOW 814
36 97 MED-LOW 814
37 99 MED-LOW 814
36 97 MED-HI 707
0.5 0.6
729 713
344 337
971 935
458 441
1102 1063
520 502
1207 1145
569 540
L
O
N
C S
ONTINUOUS PEED
When the "Low Heat" switch is selected
only one element will offer continuous
warmth.
When "No Heat" is selected the blower will
run continuously at either Low or High
speed as selected by the Speed Selector
switch.
When "OFF" is selected the blower is not
engaged.
H
OW EAT
FF
H
O EAT