Unit Commissioning & Operating Conditions - Carrier 50YER036 Installation, Operation And Maintenance Instructions

W a t e r- t o - W a t e r ( 5 0 Y E R ) S e r i e s - P u r o n
R e v. : 1 J u l y, 2 0 1 0
Safety Features
the alarm relay will cycle on and off. The cycle rate will
be "on" for 5 seconds, "off" for 25 seconds, "on" for 5
seconds, "off" for 25 seconds, etc.
UPS warning code = 8
Swapped FP1/FP2 thermistors: During test mode, the
control monitors to see if the FP1 and FP2 thermistors
are in the appropriate places. If the control is in test
mode, the control will lockout with code 9 after 30
seconds if:
a) The compressor is on in the cooling mode and the
FP1 sensor is colder than the FP2 sensor, or:
b) The compressor is on in the heating mode and the
FP2 sensor is colder than the FP1 sensor.
Swapped FP1/FP2 thermistor code = 9.
ESD (DXM only): The ESD (Emergency Shut Down)
mode can be enabled from an external common signal
to terminal ESD to shut down the unit. The green
status light will flash code 3 when the unit is in ESD
mode.
ESD mode = code 3 (green "status" LED)
CXM Controls
Diagnostic Features
The LED on the CXM board advises the technician of
the current status of the CXM control. The LED can
display either the current CXM mode or the last fault in
memory if in test mode. If there is no fault in memory,
the LED will flash Code 1 (when in test mode).
CXM Control Start-up Operation
The control will not operate until all inputs and safety
controls are checked for normal conditions. The
compressor will have a 5 minute anti-short cycle delay
at power-up. The first time after power-up that there is
a call for compressor, the compressor will follow a 5 to
80 second random start delay. After the random start
delay and anti-short cycle delay, the compressor relay
will be energized. On all subsequent compressor calls,
the random start delay is omitted.
24
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Unit Commissioning & Operating
Conditions
Environment – This unit is designed for indoor
installation only. Do not install in an area subject to
freezing or where humidity levels can cause cabinet
condensation.
Power Supply – A voltage variation of +/- 10% of
nameplate utilization voltage is acceptable.
Operation and performance is primarily dependent
upon water temperatures, water flow rates and
ambient air temperature. This water to water heat
pump is capable of operating over a wide temperature
range and with flow rates of between 1.5 GPM (.1 l/s)
and 3 GPM (.19 l/s) per ton, however usually no more
than one of these factors may be at a minimum or
maximum level at a time.
The commissioning table indicates water
temperatures which are suitable for initial unit
commissioning in an environment where the flow rate
and water temperature is not yet stable and to avoid
nuisance shut down of the units freeze and refrigerant
pressure safeties.
The operating table indicates the maximum and
minimum ranges of the unit.
For more specific unit performance reference the
product catalog, the submittal data sheets or contact
your supplier for assistance.
BUILDING COMMISSIONING
Cooling
Unit Size 036 060/120
Source Min/Max 50/110 50/120
Load Min/Max 60/80 60/90
Ambient Min/Max 45/110
BUILDING OPERATING
COOLING
Unit Size 036 060/120
Source Min/Max 50/120 50/120
Load Min/Max 50/90 50/90
Ambient Min/Max 45/110
Heating
170/340 036 060/120 170/340
50/90 30/80 30/80 50/70
60/90 60/120 60/120 80/120
39/85
HEATING
170/340 036 060/120 170/340
50/110 20/80 20/80 20/70
50/90 60/130 60/130 60/120
39/85