14
STARTUP, ADJUSTMENTS, AND CHECKS
HIGH VOLTAGE!
T
O
AVOID
PERSONAL
INJURY
OR
DEATH
DUE
TO
ELECTRICAL
SHOCK
,
BOND
THE
FRAME
OF
THIS
UNIT
TO
THE
BUILDING
ELECTRICAL
GROUND
BY
USE
OF
THE
GROUNDING
TERMINAL
PROVIDED
OR
OTHER
ACCEPTABLE
MEANS
. D
ISCONNECT
ALL
POWER
BEFORE
SERVICING
OR
INSTALLING
THIS
UNIT
.
WARNING
Pre-Startup Instructions - General
T
O
PREVENT
PROPERTY
DAMAGE
OR
PERSONAL
INJURY
, D
O
NOT
START
THE
UNIT
UNTIL
ALL
NECESSARY
PRE
-
CHECKS
AND
TEST
HAVE
BEEN
PERFORMED
.
CAUTION
Prior to the beginning of Startup, Adjustments, and Checks pro-
cedures, the following steps should be completed in the building.
MOVING MACHINERY HAZARD!
T
O
PREVENT
POSSIBLE
PERSONAL
INJURY
OR
DEATH
,
DISCONNECT
POWER
TO
THE
UNIT
AND
PADLOCK
IN
THE
“OFF”
POSITION
BEFORE
SERVICING
FANS
.
WARNING
This unit is equipped with an electronic ignition device to auto-
matically light the main burners. It also has a power vent blower
to exhaust combustion products.
On new installations, or if a major component has been replaced,
the operation of the unit must be checked.
Check unit operation as outlined in the following instructions. If
any sparking, odors, or unusual sounds are encountered, shut off
electrical power and recheck for wiring errors, or obstructions in
or near the blower motors.
Duct covers must be removed before
operating unit.
The Startup, Adjustments, and Checks procedure provides a step-
by-step sequence which, if followed, will assure the proper startup
of the equipment in the minimum amount of time. Air balancing
of duct system is not considered part of this procedure. However,
it is an important phase of any air conditioning system startup and
should be performed upon completion of the Startup, Adjustments,
and Checks procedure. The Startup, Adjustments, and Checks
procedure at outside ambients below 55°F should be limited to
a readiness check of the refrigeration system with the required
final check and calibration left to be completed when the outside
ambient rises above 55°F.
Temporary Heating Or Cooling
If the unit is to be used for temporary heating or cooling, a “Startup,
Adjustments, and Checks” must first be performed in accordance
with this manual. Damage or repairs due to failure to comply with
these requirements are not covered under the warranty.
After
the
machines are used for temporary heating or cooling, inspect the
coils, fans, and motors for unacceptable levels of construction dust
and dirt and install new filters.
Contractor Responsibility
The installing contractor must be certain that:
• All supply and return air ductwork is in place, properly
sealed, and corresponds with installation instructions.
• All thermostats are mounted and wired in accordance
with installation instructions.
• All electric power, all gas, hot water or steam line
connections, and the condensate drain installation have
been made to each unit on the job. These main supply
lines must be functional and capable of operating all units
simultaneously.
• Requirements are met for venting and combution air.
• Air filters are in place.
• Input rate and temperature rise are adjusted per rating
plate.
Roof Curb Installation Check
Inspect the roof curb for correct installation. The unit and curb
assembly should be level. Inspect the flashing of the roof mounting
curb to the roof, especially at the corners, for good workmanship.
Also check for leaks around gaskets. Note any deficiencies in a
separate report and forward to the contractor.
Obstructions, Fan Clearance and Wiring
Remove any extraneous construction and shipping materials that
may be found during this procedure. Rotate all fans manually to
check for proper clearances and that they rotate freely. Check for
bolts and screws that may have jarred loose during shipment to the
job site. Retighten if necessary. Re-tighten all electrical connections.
Field Duct Connections
Verify that all duct connections are tight and that there is no air
bypass between supply and return.
Filter Section Check
Remove filter section access panels and check that filters are prop-
erly installed. Note airflow arrows on filter frames.
Pre-startup Precautions
It is important to your safety that the unit has been properly
grounded during installation. Check ground lug connection in main
control box for tightness prior to closing circuit breaker or discon-
nect switch. Verify that supply voltage on line side of disconnect
agrees with voltage on unit identification plate and is within the
utilization voltage range as indicated in Appendix C Electrical Data.
System Voltage -
That nominal voltage value assigned to a circuit
or system for the purpose of designating its voltage class.
Nameplate Voltage -
That voltage assigned to a piece of equip-
ment for the purpose of designating its voltage class and for the
purpose of defining the minimum and maximum voltage at which
the equipment will operate.
Utilization Voltage -
The voltage of the line terminals of the equip-
ment at which the equipment must give fully satisfactory perfor-
mance. Once it is established that supply voltage will be maintained
within the utilization range under all system conditions, check
