Start-up
Pre Start-up Procedure
Before requesting start-up, check that the installation is
complete and unit is ready. Complete the pre start-up
check list below and in the
items are checked. For torque values on set screws, belt
tension, etc., check under
1. Set the electrical disconnect to the ‘Off’ position.
2. Check the unit for obstructive packaging, objects
near or in blowers, dampers, enthalpy wheel, etc.
Remove all red tie down bolts on fan assemblies and
heat wheel if so equipped.
3. Check that the fans and heat wheel are rotating freely.
4. Check blower wheels and drive set screws. Tighten
if required.
5. Check belt alignment and tension.
6. Check that the air filters are installed and clean.
Replace if necessary. If filters are equipped with
optional differential pressure switch, check desired
setpoint does not exceed factory setting of 0.8” w.c.
[200 Pa].
7. Check coils (if equipped) if fins have been damaged
in transit or construction and are clean. Straighten
fins with fin comb and clean coil if required (not appli-
cable to brazed aluminum heat exchangers).
8. Check the refrigerant components and piping that
they are in good condition and have no damage or
leaks from shipping or installation.
9. Check that the clearance around the air cooled
condenser is within minimum clearance and the dis-
charge is not blocked.
10. Check that the water strainer has been installed
for a water source heat pump with a brazed heat
exchanger.
11. Check that ductwork is connected and complete.
12. Check that condensate drain connections have been
trapped, installed correctly and filled.
13. Check that all shipped loose or field supplied com-
ponents have been correctly installed and wired and
that start interlocks have been completed for the
ventilation control desired.
14. Check that the standard field wiring terminal diagram
has been marked up accordingly and left with the
unit.
15. Check that all power supplies and control wiring
have been inspected and approved by the Local Au-
thorities having jurisdiction.
16. Check all factory and field wiring connections for
tightness. Tighten if necessary.
17. Check that any pipe chase or access opening to ex-
tend piping or wiring through the casing or floor has
been sealed air- and water-tight.
18. Check that all fuses are properly installed in holders.
19. Check the voltage at the disconnect switch against
the nameplate and against phase-to-phase readings
on three-phase. If the voltage is not within 10% of
rated or 2% of phase-to-phase, have the condition
corrected before continuing start-up.
20. Check that all field piping and venting installation and
connections for the heating and cooling options have
been completed and tested.
21. Set the heating and cooling enable switches to the
‘Off’ position.
VCES-VHC-IOM-1F – VHC-36, -42 & -50
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