Table J2: Start-up Checklist
Checklist Item
Yes
N/A
1
Before proceeding, complete the pre start-up checklist.
2
Close all access panels or doors.
3
Turn the main disconnect to the ‘On’ position.
4
Set the timer, selector switch or BMS to close the contact for the scheduling mode desired and check
operation and sequence.
Occupied ventilation (Ov):
With the occupancy contact closed or a jumper placed across terminals, heat
wheel starts (not in free cooling), defrost recirculation damper closes (if equipped), outside and exhaust air
dampers (if equipped) begin to open; after outside air damper opens fully the blower starts and after the
exhaust air damper opens fully the exhaust blower starts.
Unoccupied recirculation (Ur):
With the unoccupied recirculation contact closed or a jumper placed across
terminals, heat wheel stops, defrost recirculation damper opens, outside and exhaust air dampers (if
equipped) begin to close and supply blower starts.
Occupied recirculation (Or) (DDC controls package only):
With the occupied recirculation contact closed or
a jumper placed across terminals, heat wheel starts (not in free cooling), defrost recirculation damper closes
(if equipped), outside air damper (if equipped) opens; after outside air damper opens supply blower starts,
exhaust air damper (if equipped) opens. After exhaust air damper opens exhaust blower starts, occupied
recirculation damper opens, outside and exhaust air dampers modulate to the damper minimum setpoints.
5
Are dampers operating properly?
6
Are fans and heat wheel rotating in the correct direction?
7
For occupied recirculation mode adjust outside air and exhaust air damper positioner to achieve the required
air volume.
8
Re-check the voltage at the disconnect switch against the nameplate and against phase-to-phase readings
on three-phase with all blowers operating. If the voltage is not within 10% of rated or 2% of phase-to-phase
have the condition corrected before continuing start-up.
9
Check amperage draw to each motor on each phase against motor nameplate FLA. If significantly different
check ductwork static and/or take corrective action.
10
Before activating the compressor on WSHP units, are water shut-off valves open and is water circulating
through the water-to-refrigerant heat exchanger.
11
Enable cooling and check if the sound of the compressor is normal or if there is excessive vibration.
12
Check all field and factory refrigerant and water piping connections for leaks and correct.
13
On units with gas-fired furnace module, check the manual reset high limit switch is closed (press reset
button) and check supply air proving interlock switch setting to ensure minimum supply airflow prior to
burner operation. Set the switch to open below the minimum supply airflow on the furnace rating plate.
14
Enable heating options, see start-up and check out instructions in
for gas furnace and
for electric coil and complete.
15
Check the operation of the control options provided on the unit.
16
Check the setpoints on the DDC Points Reference; adjust and record changes as required.
17
When unit has achieved steady state take measurements and complete readings section of Start-up Form
for each operating cycle to verify all components are functioning properly.
Serial Number: _____________________________________
VCES-VHC-IOM-1F – VHC-36, -42 & -50
59
