Quantech QTC3040T, Installation Operation & Maintenance

Page: 108 / 190

QUANTECH
108
FORM QTC3-NM1
ISSUE DATE 08/03/2022
SECTION 6 – COMMISSIONING
SETPOINTS ENTRY LIST
UNIT OPTIONS
Display Language

System 1 Switch

System 2 Switch

Chilled Liquid

Ambient Control*

Local/Remote Mode

Control Mode

Display Units

Lead/Lag Control*

Fan Control*

Manual Override

Power Fail Restart

Soft Start**

Unit Type**

Refrigerant Type**

Flash Card Update

Remote Temperature Reset

External Evaporator Pump

YORK Hydro Kit Pump

Pump Selection

Data Log to Flashcard Enabled

Expansion Valve Type**

COOLING SETPOINTS
Cooling Setpoint

Range

EMS-PWM Max. Setpoint

PROGRAM SETPOINTS
Discharge Pressure Cutout

Suction Pressure Cutout

Low Ambient Temp. Cutout

Leaving Liquid Temp. Cutout

Anti-Recycle Time

Fan Control ON Pressure

Fan Differential OFF Pressure

Total # of Compressors

Number of Fans/System*

Unit/System Voltage*

Remote Unit ID

* Not on All Models **Viewable Only
F. STARTUP
Panel Checks (Power On - Both Unit Switch Off)
1. Apply three-phase power and verify its value. Volt-
age imbalance should be no more than 2% of the
average voltage ......................................................
2. Apply 120 VAC (110 VAC for 50 Hz units) and
verify its value on the terminal block in the Power
Panel. Make the measurement between Termi-
nals 5 and 2 of XTBC2. The voltage should be
120 VAC plus or minus 10% .....................................
3. Program or verify the Cooling Setpoints, Program
Setpoints, and Unit Options. Record the values
in the Setpoints Entry List table ................................
4. Place the unit into Service Mode and cycle each
condenser fan to ensure correct rotation .................
If the chiller is equipped with VSD fans, the
cycling condenser fan cannot be used to con-
firm phase sequence. Use a phase checker or
temporarily bypass the VSD before starting a
compressor.
5. Turn System 2 off and leave System 1 running.
Refer to Section 8 – Unit Operations (Form
QTC3-NM1)
,
Unit Keys, Option 2
for more infor-
mation on System Switches ......................................
6. Connect a manifold gauge to system 1 suction
and discharge service valves. ...................................
7. Place the Unit Switch in the control panel to the
ON position. ...............................................................
NOTE: The chilled liquid setpoint may need to
be temporarily lowered to ensure all compres-
sors cycle ON.
As each compressor cycles ON, ensure that the
discharge pressure rises and the suction pressure
decreases. If this does not occur, the compressor
being tested is operating in the reverse direction and
must be corrected.
8. Verify proper compressor rotation and then turn
the Unit Switch to OFF ..............................................
NOTE: This unit uses scroll compressors, which
can only operate in one direction. Failure to ob-
serve this will lead to compressor failure.
9. Turn System 1 OFF and System 2 ON (two system
units only). Refer to
Section 8 – Unit Operations
(Form QTC3-NM1), Unit Keys for more information ...
10. Place the Unit Switch in the control panel to the
ON position. ...............................................................
NOTE:
The chilled liquid setpoint may need to
be temporarily lowered to ensure all compres-
sors cycle ON.
As each compressor cycles ON, ensure that the dis-
charge pressure rises and the suction pressure
decreases. If this does not occur, the compressor
being tested is operating in the reverse direction and
must be corrected.
11. Ensure that the Data Logging feature has been
enabled ......................................................................
12. Verify correct compressor rotation and then turn
the Unit Switch to OFF...............................................