Carrier C4H5S Installation Instructions Manual page 7

C4H5S, H4H5S, T4H5S: Installation Instructions
CAUTION
!
ENVIRONMENTAL HAZARD
Failure to follow this caution may result in environmental damage.
Federal regulations require that you do not vent refrigerant to the
atmosphere. Recover during system repair or final unit disposal.
Follow these steps to properly start up the system:
1. After system is evacuated, fully open liquid and vapor service
valves.
2. Unit is shipped with valve stem(s) front seated (closed) and caps
installed.Replace stem caps after system is opened to refrigerant
flow. Replace caps finger-tight and tighten with wrench an
additional 1/12 turn
3. Close electrical disconnects to energize system.
4. Set room thermostat at desired temperature. Be sure set point is
below indoor ambient temperature.
5. Set room thermostat to HEAT or COOL and fan control to ON or
AUTO mode, as desired. Operate unit for 15 minutes. Check
system refrigerant charge.
Fig. 10 – Ion™ Communicating Control Four-Wire Connection
NOTE: Wiring must conform to NEC or local codes.
NOTE: For standard thermidistat or thermostat wiring, see Installation
Instructions for those products.
Check Charge
Factory charge amount and desired subcooling are shown on unit rating
plate. Charging method is shown on information plate inside unit.
Additional subcooling may be required to achieve optimal heating
performance based on installed indoor unit. (see
check or adjust charge, conditions must be favorable for subcooling
charging. Favorable conditions exist when the outdoor temperature is
between 70°F and 100°F (21.11°C and 37.78°C), and the indoor
temperature is between 70°F and 80°F (21.11°C and 26.67°C). Follow
the procedure below:
Unit is factory charged for 15ft (4.57 m) of lineset. Adjust charge by
adding or removing 0.6 oz/ft of 3/8 liquid line above or below 15ft (4.57
m) respectively.
For standard refrigerant line lengths (80 ft/24.38 m or less), allow system
to operate in cooling mode at least 15 minutes. When operating with the
Ion™ Wall Control make sure that indoor airflow is set to "Efficiency"
during charging. If conditions are favorable, check system charge by
subcooling method. If any adjustment is necessary, adjust charge slowly
and allow system to operate for 15 minutes to stabilize before declaring a
properly charged system.
If the indoor temperature is above 80°F (26.67°C), and the outdoor
temperature is in the favorable range, adjust system charge by weight
based on line length and allow the indoor temperature to drop to 80°F
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
(26.67°C) before attempting to check system charge by subcooling
method as described above.
If the indoor temperature is below 70°F (21.11°C), or the outdoor
temperature is not in the favorable range, adjust charge for line set length
above or below 15ft (4.57 m) only. Charge level should then be
appropriate for the system to achieve rated capacity. The charge level
could then be checked at another time when the both indoor and outdoor
temperatures are in a more favorable range.
NOTE: If line length is beyond 80 ft (24.38 m) or greater than 20 ft
(6.10 m) vertical separation, See Long Line Applications Guideline for
special charging requirements.
Heating Tech Label
To check system operation during heating cycle, refer to the Heating
Tech Label on outdoor unit. This label indicates whether a correct
relationship exists between system operating pressure and air
temperature entering indoor and outdoor units. If pressure and
temperature do not match on chart, system refrigerant charge may not be
correct. Do not use label to adjust refrigerant charge.
Turn on power to indoor and outdoor units. Transformer is energized
with power supplied.
Cooling
On a call for cooling, a standard thermostat (non-communicating) makes
circuits R-O and R-Y and R-G. Circuit R-O energizes reversing valve,
switching it to cooling position. Circuit R-Y energizes contactor, starting
outdoor fan motor and compressor circuit. R-G energizes indoor unit
blower relay, starting indoor blower motor on high speed.
When a standard thermostat (non-communicating) is satisfied, its
contacts open, de-energizing contactor and blower relay. Compressor
and motors should stop.
NOTE: If indoor unit is equipped with a time-delay relay circuit, the
indoor blower will run an additional 90 seconds to increase system
efficiency.
A221578
Heating
On a call for heating a standard thermostat (non-communicating) makes
circuits R-Y and R-G. Circuit R-Y energizes contactor, starting outdoor
fan motor and compressor. Circuit R-G energizes indoor blower relay,
starting blower motor on high speed.
Should temperature continue to fall, R-W2 is made through second-stage
room thermostat. Circuit R-W2 energizes a relay, bringing on first bank
of supplemental electric heat and providing electrical potential to second
heater relay (if used). If outdoor temperature falls below setting of
Table 4). To properly
outdoor thermostat (factory installed), contacts close to complete circuit
and bring on second bank of supplemental electric heat.
When thermostat is satisfied, its contacts open, de-energizing contactor
and relay. All heaters and motors should stop after all fan off delays.
Heat Pump System Functions and Sequence
The outdoor unit control system has special functions. The following is
an overview of the control functions.
Sequence of Operation
Cooling & Heating Operation
This product utilizes either a standard indoor thermostat or Ion™
Communicating Control. With a call for cooling, the outdoor fan,
reversing valve, and compressor are energized. When the cooling
demand is satisfied, the compressor and fan will shut off. The reversing
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General Sequence of Operation
Standard Thermostat
of Operation