Page 20
Startup
13. Check-Test
Start (cont'd)
KEY to Check/Test/
Startup Procedures:
o
Procedure applies to
all units.
¡
Procedure only applies
to units with the
optional component
referred to in that
procedure.
o
1. Check to be sure that all field-installed accessories are installed.
o
2. Check all field-installed wiring.
o
3. Check all ductwork for obstructions; open all diffusers.
o
4. Turn the three-position switch or optional summer/off/winter remote
console switch to OFF position. To prevent someone from turning the
system on, tape the switch leaving a note that it should be left in the OFF
position.
¡
5. If the system includes an air control with a remote potentiometer, set
the position as follows::
Option AR19 (Variable Air Volume) - Turn full "open"
Option AR22 (Return Air) - Turn full "closed"
6. Check disconnect switch --
o
Turn disconnect switch OFF.
o
Check disconnect switch to be sure that it is tightly secured against the
cabinet.
o
If disconnect is fusible, check that fuses are installed. If fuses are not
installed, insert dual element time delay fuses sized 1.25 times the maxi-
mum total input amps. Verify continuity of fuses.
7. Open the hinged gas/electric control compartment door --
o
Close all manual gas valves.
o
Check all wiring and wiring connections on gas controls and electrical
components.
o
If equipped with any manually reset devices such as an optional firestat
limit switch, a high limit switch, and/or optional high gas pressure switch,
reset devices. Check setpoint on the high ambient burner cutoff air control
(60°F).
8. Open the hinged door to the blower compartment --
o
Remove any blocking and shipping supports.
o
Check that the blower belts are installed and have correct tension and that
pulleys are in alignment and locked to the shaft (See Paragraph 12).
Inside the compartment, remove the cover from the limit switch junction
box.
o
Reset manual limit switch.
o
Check wiring connections to limit switches, discharge air sensor, and
motor.
o
Replace the junction box cover.
9. Turn ON gas supply valve and inlet manual shutoff valve on the mani-
fold.
o
Leak test gas connections upstream of the electric gas valve. Be sure all
connections are tight and leak tested. WARNING: DO NOT TEST WITH
OPEN FLAME.
o
Turn OFF manual gas valves.
10. Turn blower service switch (Electrical Compartment, See FIGURE 26)
to OFF position. If present, verify that damper test switch is in TEST
position.
1. Prepare system for startup testing --
o
Attach a slope gauge (0 to 1.0" scale) to the tubing connections in the
control compartment. The two connections are located just left of the
electrical box. Remove the caps on the 1/8" NPT test connections and
attach the slope gauge. (The recommended method for attaching the slope
gauge is to use field-supplied 1/8" female NPT x 1/4" OD barbed hose
connections.)
Before Startup
