9
4. Start-up
Equipment operation during con-
struction is not recommended.
Construction site pollution may
seriously degrade performance,
damage unit and void all manu-
facturer warranties.
Power should be on at least 24 hours prior to start-up to
allow crankcase heater(s) to boil off refrigerant that may
have accumulated in the compressor(s) oil.
Failure to adhere to the following start-up procedures
will void all manufacturer warranties.
Do not alter factory wiring.
Deviation from the supplied
wiring diagram shall void all
warranties and may result in
equipment damage and/or
personal injury. Contact the
factory with wiring discre-
pancies.
General
ONLY QUALIFIED, AUTHORIZED PERSONNEL SHOULD POW-
ER ON, OR START-UP THIS EQUIPMENT.
The use of common sense, and good practice in the install-
ation, and start-up of equipment will prevent many potent-
ial problems with the system in the future.
Before starting up the equipment, building construction
should be complete, and start-up personnel should:
Have a working knowledge of general HVAC and
mechanical commissioning procedures and prac-
tices.
Be familiar with units functions, features, optional
unit accessories, and all control sequences;
Have appropriate literature on hand for consult-
ation.
Before the structure is occupied, the installation,
start-up personnel must take three essential steps:
1. Check Out
2. Start-up
3. Commissioning
Check Out
Equipment should be thoroughly checked for loose wiring,
a free spinning blower wheel, and wheel fitting access pan-
els. Air handlers should not be operated without proper
ductwork and access panels installed, except as required
during start-up and air balancing.
1. Check all electrical connections to be sure they
are tight.
2. Open all access panels, and remove all shipping
screws, or restraints.
3. Clean out any debris that may have been left.
4. Check belt alignment if any, and tightness of fan
drives.
5. Check bearing locking collars, and fan wheel set
screws for tightness.
6. Turn fan wheels to assure free rotation.
7. Ensure electrical supply matches the unit name-
plate.
8. Ensure the existence of a drainage ‘P” trap.
9. Ensure condensate lines are connected, glued and
have the right slope.
10. Check local codes for any special provisions.
11. Replace, and/or close all access panels.
12. Ensure that return, and/or supply dampers in
ductwork are open.
Start-up
Install gauges, voltmeter and amp meter before start-up.
Observe refrigerant pressures during initial operation.
Note and determine the cause of any excessive sound, or
vibration. Follow start-up procedures outlined below to
start each piece of equipment.
1. Make sure thermostat is OFF, turn the unit power
ON. In three (3) phase unit check electrical phas-
ing to ensure phase monitor turns on (where
available) and fan rotates in proper direction.
Switch phases if necessary.
2. Check and record water temperature, water flow
rate, space temperatures and make sure all fig-
ures match the range of operation.
3. For HPX units please refer to Control Spec for HPX
unit.
4. Set thermostat to highest temperature setting,
turn fan switch to AUTO and mode of operation to
COOL.
