IO-123084-GAW-063017
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©2017 AirMark
Fig. 6. Shows the components of a typical TXV
assembly
TXV BULB
TAIL PIECE
DISTRIBUTOR
TEFLON O-RINGS
Fig.6. Components of a typical TXV assembly
CAUTION
Using a non-bleed expansion valve
may require the use of a hard-start kit. Follow the
outdoor unit manufacturer’s guidelines.
Electrical Installation
These units are designed for single or three phase
208/240 volts, 60 Hz power supply. Wire selection
and wiring must be in accordance with the
National Electric Code and/or local codes. Unit
terminals are designed to accommodate copper
and aluminum wirings. If aluminum wiring is used;
please observe special precautions relative to
sizing, wire connections and corrosion protection.
All models with 5, 8 or 10 kW electric heat are
arranged for single circuit connections. Models
larger than 10 kW are arranged for multi-circuit
protection. Fig. 7 shows the typical electrical
connections required for the air handler unit.
Fig.7. Typical electrical connections required
System Charging
CAUTION
An improperly charged system
may cause degradation in system performance
and damage the compressor.
After installing the coil, refer to the outdoor unit
manufacturer’s instructions for charging
techniques and amount of charge. If outdoor unit
manufacturers charging instructions are
unavailable; then refer to instructions below to
charge the system.
1) Bring airflow up to the maximum CFM
possible according to Table 2 below.
2) Flowrator coils – Add refrigerant until the
superheat measured at the outdoor unit
suction/vapor line matches the superheat
listed in Table 2.
Expansion valve coils – Add refrigerant until the
subcooling measured at the outdoor unit liquid line
matches the subcooling recommendation of the
outdoor manufacturer (typically 7º – 10º F).
If
chart is unavailable, charge unit to a subcooling
value of 8ºF +/- 1ºF."