IO-123084-GAW-063017
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©2017 AirMark
Outdoor Temp
°F D.B.
Superheat °F
Min
Nom
Max
65
35
40
45
70
31
35
39
75
26
30
34
80
22
25
28
85
17
20
23
90
13
15
17
95
8
10
12
100
4
5
6
Table.2. Superheat chart
Start up
After all connections are made, start-up and
check-up of the unit must be performed before
proper evaluation of the entire system can be
made. Make sure that heat anticipator is properly
set as noted on thermostat instructions.
Load requirements can vary in each residence and
it may be necessary for the installer or homeowner
to make slight adjustments to the heat anticipator
setting for longer or shorter cycles. It is
recommended to change the setting no more than
plus or minus 0.05 amps at a time. Greater
changes can cause the unit to rapid cycle or
remain on excessively. To properly check the
unit's operation, the installer should have an
electrical current measuring device (0-10 amp
Amprobe, Fluke), air pressure measuring device
(0-1.0 in slope gauge), and a temperature-
measuring device (0-200ºF thermometer).
Install the Amprobe to measure blower current, the
slope gauge to measure static air pressure at the
units and the temperature device to measure unit
supply and return air temperature. Before taking
measurements, be sure that all registers, grilles
and dampers are open or are set to their proper
positions. Be sure that clean filters are in place.
Temperature measuring device must be installed
to obtain average temperature at both inlet and
outlet. For outlet, measure temperature of each
main trunk at a location far enough away to avoid
heater radiation and read the average
temperatures. Table 3 below shows the CFM that
should be achieved at various external static
pressures
Table 3. CFM delivered at various external statics
Electrical Heat Controls:
•
Turn on power supply. Set thermostat fan
switch to on. Set the cooling indicator to
maximum, heating to minimum. System switch
may be on heat or cool. Check slope gauge
measurement against appropriate air flow
chart. Make damper, register and motor speed
adjustments to obtain required airflow.
•
Set thermostat fan switch to auto, system to
heat and thermostat heating indicator to
maximum heat. Blower should start and all
heat be energized.
•
Check air flow using temperature rise method.
(
)
RISE
TEMP
BTUH
OUTPUT
CFM
×
=
08
.
1
NOTE:
BTUH output should be computed by
VOLT x AMPS x 3.4 = BTUH OUTPUT. Since line
volt can vary, do not use nameplate rating to
determine output.
OPERATION AND MAINTENANCE
Below are brief descriptions of the key
components of the unit and installation. This
manual only provides general idea of the
components and recommended practices. The
installer should use best judgment to ensure safe
installation and operation of the unit.
1) Room Thermostat- This is the device that
controls that operation of your heating and/or
cooling unit. It senses the indoor temperature
and signals the equipment to start or stop
0.10
0.20
0.30
0.40
0.50
LOW
873
860
834
800
746
HIGH
1000
972
930
888
823
LOW
1123
1094
1062
1034
1000
HIGH
1396
1358
1313
1261
1200
2.8
5.4
SPEED
TAP
MOTOR
AMP
GAW18/24
GAW30/36
MODEL
CFM V. EXTERNAL STATIC
PRESSURE
