Section 2 - Operation; Pre-Start-Up Checklist; Initial Unit Start-Up - Johnson Controls VB09 Installation, Operation And Maintenance Manual

FORM 145.18-IOM1
ISSUE DATE: 8/30/2018
Once the installation is complete and the system is
cleaned and flushed, begin unit start-up. Open the sup-
ply and return shut-off valves at each unit, refill the
system, and bleed off all air.

PRE-START-UP CHECKLIST

Before energizing the unit, perform the following
checks and complete the Vertical Stacked Heat Pump
Start-Up and Performance Checklist (Form 145.18-
CL1) in compliance with warranty requirements.
The high voltage power supply is correct and in
… …
accordance with the nameplate ratings.
The field wiring and circuit protection are the cor-
… …
rect size.
The unit is electrically grounded.
… …
The low voltage control wiring is correct per the
… …
unit wiring diagram.
There is vibration isolation (for example, unit iso-
… …
lation pad, flexible hoses).
The low-side or high-side pressure temperature
… …
caps are secure and in place.
All the unit access panels are secure and in place.
… …
The thermostat is in the OFF position.
… …
The water flow is established and circulating
… …
through all the units.
The ductwork (if required) is correctly sized, run,
… …
taped, and insulated.
The indoor blower turns freely without rubbing.
… …
If applicable, glycol fluid was added in the proper
… …
mix to prevent freezing in closed system applica-
tion.
Clean, properly sized air filters are in place.
… …
The condensate drain pipe is firmly secured to
… …
both the drain riser and the drain pan stub.

SECTION 2 - OPERATION

INITIAL UNIT START-UP

1. Close the disconnect switches on all units to pro-
2. Set the thermostat to the highest temperature set-
3. Set the thermostat system switch to COOL and
4. Reduce the temperature control setting until the
5. Turn the thermostat switch to the OFF position.
6. To allow for pressure equalization, leave the unit
7. Turn the thermostat to the lowest setting.
8. Set the thermostat system switch to the HEAT po-
9. Adjust the temperature setting upward until the
During installation, testing, servicing,
and troubleshooting of this product, it
may be necessary to work with live electri-
cal components. Failure to follow all elec-
trical safety precautions when exposed to
live electrical components could result in
serious injury or death.
vide line power.
ting.
the fan control switch to AUTO. The compressor
should NOT run.
compressor and supply fan energize, with the
following results:
• Water temperature leaving the heat exchang-
er is warmer than the entering water temper-
ature (EWT) (approximately 9.0–12.0°F).
• The blower operation is smooth.
• The compressor and blower amps are within
the nameplate data values.
• The suction line is cool with no frost ob-
served in the refrigerant circuit.
The compressor and fan stop running and the re-
versing valve de-energizes.
off for approximately 5 minutes.
sition. The compressor should NOT run.
compressor and supply fan energize, with the fol-
lowing results after several minutes:
• Warm air is detected at the supply register.
• The water temperature decreases approxi-
mately 5.0–9.0°F across the heat exchanger.
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