18
UI SYSTEM INITIAL POWER UP AND
CHECKOUT
!
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Ensure cabinet and electrical box are properly grounded
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From the UI main screen select menu. Then find and select
the service cap icon. Touch and hold the icon for about 10
seconds until it turns hat green then release to enter the screen
that provides these options:
S
Equipment summary
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Installation
S
Setup
S
Checkout
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Select Installation to initialize equipment set up and follow
screen prompts as necessary.
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Verify equipment summary is correct and complete by
selecting equipment summary.
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Select Setup option to select system settings such as brownout
protection, lock out settings and freeze protection. Set up air
flow settings in the Setup option. Follow on screen prompts
for airflow options.
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Airflow verification test can be achieved from the installation
and service screen after full installation.
Cooling Airflows
:
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Quiet: lowest airflow (~300CFM pr ton)
S
Comfort: Default (varied on temp/humidity)
S
Efficiency: (1 and 2) (fixed and no dehum)
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Max: (~400 CFM pr ton) (no dehum)
Heating Airflows
:
S
Comfort: Default (varied on temp/humidity)
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Efficiency: (1 and 2) (fixed and no dehum)
S
Max: (~400 CFM pr ton) (no dehum)
Check out mode can now be accessed to check out cooling or
heating modes for up to 120 minutes and can be stopped at any
time.
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Verify low cool
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Verify high cool
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Verify low heat
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Verify high heat
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Verify Electric Heat Operation in emergency and auxiliary heat
mode if applicable
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Conduct System Verification per the section below and the
start--up checklist.
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Set up the thermostat for normal operation, set up customer
preferences for programming
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Check for vibration, leaks, etc.
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Make sure company logo and contact info has been added to
UI.
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Explain thermostat operation and maintenance to the
homeowner.
SYSTEM VERIFICATION
(COMMUNICATING & NON--COMMUNICATING)
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The unit is shipped with a Unit Start--up Checklist in the
literature package. Allow the unit to operate for minimum of 5
minutes between system changes to stabilize before checking
system performance.
NOTE
: It is not recommended to access the refrigerant system at
start up on package units. Access should only be necessary as
last resort in troubleshooting to prevent unnecessary charge
issues.
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Check the water flow and operating conditions. Reference
Table 10.
NOTE
: Tables typically show 3 GPM rates for each unit size.
Rates are described from top to bottom listed as:
Top listed GPM: minimum suggested for open loop.
Middle listed GPM: minimum suggested for closed loop.
Bottom listed GPM: Suggested rate for closed loop.
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Verify the unit is operating within 10% of the Heat of
Extraction (HE)/Heat of Rejection (HR) published in the unit
Product Data Performance tables. Access Product Data on
HVAC Partners.
a. HE/HR= GPM x TD x Fluid Factor (500 for water, 485
for antifreeze).
b. Utilize Ht. Abs Btu/hr in heating mode for capacity.
c. Utilize Ht. Rej Btu/hr in cooling mode for capacity.
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Record all data on the Startup Checklist included in the unit
packet. Save the checklist in the customer file at your dealership.
Solenoid Valve Start--Up
The first time the water solenoid valve is operated, it may require
30 to 45 seconds to power open. This time is to charge an internal
capacitor. After the initial “power up” the valve will open in 5
seconds. If the line voltage power has been turned off for service
of the unit, the system will go through the same first time power up
sequence.
The 24 VAC connections to the water solenoid valve should be
made on the “C” and “W/Y” terminals. The power from the unit
controls is identified as “C” and “Y1”. The same terminals are
used if wiring in a liquid line solenoid. (See Fig. 19)
Initial Start--Up of HRP
CAUTION
!
UNIT DAMAGE AND/OR OPERATION HAZARD
Failure to follow this caution may result in unit damage
and/or improper equipment operation.
Make sure all valves in heat recovery water piping system
are open. NEVER OPERATE HR PUMP DRY.
1. Turn on the heat pump. The HR pump should not run if the
compressor is not running.
2. Turn HR switch to the “ON” position. The pump will
operate if entering water temperature to HR is below 140
_
F
and compressor discharge temperature is 120
_
F or above.
3. The temperature difference between the water entering and
leaving the heat recovery should be 5
_
F to 15
_
F.
4. Allow the unit to operate for 20 to 30 minutes to ensure it is
functioning properly. The pump should shut off when the
water temperature entering the heat recovery reaches 140
_
F.