14
Refrigerant Piping Connections
Both liquid and gas (vapor) lines must be individually
insulated.
Field piping consists of two eld-provided copper re-
frigerant lines connected to the outdoor unit. These
lines carry the liquid and vapor refrigerant to and
from the indoor unit(s).
Figure 16. Refrigerant Piping / Wiring Inlets
Table 2 lists the connection sizes at the outdoor
unit. The connections are made using the provided
brass are nuts at the end of the refrigerant piping
connections. Both liquid and gas (vapor) lines must
be individually insulated.
Table 2. Refrigerant Piping Connections
WARNING
Refrigerant leaks are unlikely; however, if a
refrigerant leak occurs, open a door or windows to
dilute the refrigerant in the room. Turn o the unit
and all other appliances that may cause a spark.
Call a licensed professional HVAC technician (or
equivalent) to repair the leak.
Use only R410A refrigerant to charge this system.
Use of other refrigerant or gas will damage the
equipment.
Do not allow air or other contaminants to enter
system during installation of refrigerant piping.
Contaminants will result in lower system capacity
and abnormally high operating pressures and may
result in system failure or explosion.
Insulate all refrigerant piping.
Refrigerant pipes may be very hot during unit
operation. Do not allow contact between wiring and
bare copper pipes.
After refrigerant piping connections have been
completed, check the system for leaks per
commissioning instructions.
Refrigerant piping and wiring connections can be
brought into the single fan outdoor unit through open-
ings provided in the front, back side, or bottom of the
unit. Dual fan cabinets have external refrigerant pipe
connections See Figure 16.
Table 1. Maximum Number of Indoor Units
Outdoor Unit
Model
Capacity
Maximum
Number of
Indoor Units
VPC018H4M-3P 1.5 ton 3
VPC024H4M-3P 2 ton 4
VPC036H4M-3PS* 3 ton 5
VPC036H4M-3PD* 3 ton 5
VPC048H4M-3P 4 ton 7
VPC060H4M-3P 5 ton 9
*S means single fan unit, D means dual fan unit.
Single Fan Unit
Front
Bottom
Side
Pipe
Dual Fan Unit
communication wire
Power and
Back
communication wire
Power and
Outdoor Unit
Model
Liquid
Line
Gas (Vapor)
Line
VPC018H4M-3P
3/8 in. 5/8 in.VPC024H4M-3P
VPC036H4M-3PS*
VPC036H4M-3PD*
3/8 in. 3/4 in.VPC048H4M-3P
VPC060H4M-3P
To Next Page
Loading...
