2
GENERAL
The single-phase VRF (variable refrigerant flow) heat pump
system offers a variety of indoor unit types and sizes, ranging
from 0.5 to 4 tons. The 38WAH outdoor units are available in
two capacities, 3 and 4 tons, to accommodate the number of in-
door units in the system. The system has capability to operate
between 50% and 130% connected capacity, allowing the sys-
tem to be tailored to the needs of the customer and the applica-
tion.
The equipment is initially protected under the manufactur-
er’s standard warranty; however, the warranty is provided un-
der the condition that the steps outlined in this manual for ini-
tial inspection, proper installation, regular periodic mainte-
nance, and everyday operation of the unit be followed in detail.
This manual should be fully reviewed in advance before initial
installation, start-up and any maintenance. Contact your local
sales representative or the factory with any questions BEFORE
proceeding.
See Fig. 1 for model number nomenclature. Table 1 lists
physical data for each unit size. Figure 2 shows unit dimen-
sions.
CAUTION
DO NOT re-use compressor oil or any oil that has been
exposed to the atmosphere. Dispose of oil per local codes
and regulations. DO NOT leave refrigerant system open to
air any longer than the actual time required to service the
equipment. Seal circuits being serviced and charge with
dry nitrogen to prevent oil contamination when timely
repairs cannot be completed. Failure to follow these proce-
dures may result in damage to equipment. For information
about replacement oil type and viscosity, see Table 1.
Fig. 1 — Model Number Nomenclature
LEGEND
VRF
— Variable Refrigerant Flow
38
WA H
0
3
6 ---
3
38
— Outdoor Unit
Product Type
WA — Single-Phase VRF
Volta
g
e (V-Ph-Hz)
3
— 208/230-1-60
Model Type
H — Heat Pump
Blank
Equipment Type
Capacity (Ton
s
)
0
3
6 — 3
04
8
— 4
a38-7430
A38-7453
