iAIRE ultraDRY Series, Руководство пользователя

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5. Disconnect jumper from terminal strip input to allow the
thermostat to take over machine.
6. Adjust sensor setpoint to a low setpoint to bring all cooling stages
on and check if hot gas line warms up.
TEST PROCEDURE
Verify operation as described above by monitoring liquid line
temperature and observing motor speed.
Heater check
1. Verify Kw of installed electric heaters.
2. Disconnect white space temperature sensor wire from
terminal strip. (This will make the thermostat see a
space temperature of -40 degrees and start heaters) There is
a five minute delay at start of heat cycle. With heater running
check amperage and verify discharge air temperature.
3. Return white space temperature sensor wire to terminal
strip.
Checking and adjusting system refrigerant charge.
Before connecting gauges to the systems suction and
discharge service ports, make the following adjustments.
1. Before running blower and compressors, close the manual
ball valve on the discharge of the #1 compressor RCCD
valve to eliminate Hot Gas Bypass during the charging
process.
2. If Low Ambient is installed, shut off ball valve to low
ambient and open bypass around low ambient to isolate L.A.
valve.
3. Before running blower and compressors, put
thermostat in TEST mode and manually set Hot Gas Valve
% to 0.0% to direct all refrigerant to DX cooling.
a) Connect gauges. (Pre-load evacuated split systems
with nominal weight of refrigerant)
b) Enable FAN and then Cool Stage 1 in TEST mode and
allow several minutes for system to stabilize.
c) Note, high pressure saturation Temperature on
gauge and the temperature of the Liquid Line leaving the
condenser. (Condensing temperature should be 100-110
degrees minimum)
d) Calculate Sub cooling (Saturation Temp – Liquid line
Temp = Sub cooling)
e) Charge systems for 12-15 degrees of sub cooling. Add
refrigerant if sub cooling is low and remove if high. With all
cooling stages enabled system should deliver 55 degree air,
or less depending on ambient conditions.
f) Record sub cooling temperature __________ degrees
g) With thermostat still in TEST mode, increase th e
Hot gas valve position in increments until discharge
air, (DAT) is raised to 70 - 72 degrees.
h) Record sub cooling temperature _____ Record evap
saturation temperature ______
i) Open RCCD valve.
j) If Low Ambient is installed, open valve to low ambient
and close valve to bypass Low Ambient.
k) Record sub cooling temperature ______ Record evap
saturation temperature ______
l) Note: You can leave the TEST menu and enter the
STATUS menu to check system temperatures at any time.
TEST mode will remain active until it is manually disabled.
about 4 degree of sub cooling.
p) Remove gauges and replace service port covers.
q) If charging for the first time note all required conditions
in startup sheets and record weight of all refrigerant added.
Record Keeping
1. Record all readings and conditions in startup sheets and
add notes to call attention to any issues for the unit installing
contractor to attend to.
2. Have the startup documents signed by supervising
foreman for mechanical contractor.
MODULATING GAS SETUP:
1: SEE APPENDIX “ E ” for standard carrier heat
m ) When charging and checks are complete, disable the
TEST mode and open the RCCD valve.
n) Allow system to stabilize and check sub cooling
again.
o) Add/Remove refrigerant as necessary to maintain
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