2
GENERAL
The VRF (variable refrigerant flow) heat pump system offers a
variety of indoor unit types and sizes, ranging from 0.5 to 6
tons. The 38VMA single-phase heat pump outdoor units are
available in three capacities (3, 4, and 5 tons). The system has
the capability to operate between 50% and 130% connected
capacity, allowing the system to be tailored to the needs of the
customer and the application.
The equipment is initially protected under the manufacturer’s
standard warranty; however, the warranty is provided under the
condition that the steps outlined in this manual for initial
inspection, proper installation, regular periodic maintenance,
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 shows
components that may or may not be used for a particular
installation. Table 2 lists physical data for each unit size. Figure
2 shows unit dimensions.
Fig. 1 —Model Number Nomenclature
Table 1 — Components Shipped with Unit
WARNING
When installing the equipment in a small space, provide
adequate measures to avoid refrigerant concentration
exceeding safety limits due to refrigerant leak. In case of
refrigerant leak during installation, ventilate the space
immediately. Failure to follow this procedure may lead to
personal injury.
WARNING
DO NOT USE TORCH to remove any component. The
system contains oil and refrigerant under pressure.
To remove a component, wear protective gloves and
goggles and proceed as follows:
a. Shut off electrical power to unit.
b. Recover refrigerant to relieve all pressure from the
system using both high-pressure and low pressure
ports.
c. Traces of vapor should be displaced with nitrogen,
and the work area should be well ventilated.
Refrigerant in contact with an open flame produces
toxic gases.
d. Cut component connection tubing with a tubing
cutter and remove component from unit. Use a pan to
catch any oil that may come out of the lines and as a
gage for how much oil to add to the system.
e. Carefully unsweat remaining tubing stubs when
necessary. Oil can ignite when exposed to a torch
flame.
Failure to follow these procedures may result in personal
injury or death.
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
procedures may result in damage to equipment.
NAME
SHAPE
QUANTITY
FUNCTION
Main Drain Connection
1
For maintenance
Adapter
1
For suction pipe connection (3/4 in. to 5/8 in.)
Equipment Type
38
— Outdoor Unit
VM
— VRF
Product Type
Voltage (V-Ph-Hz)
3
— 208/230-1-60
Blank
Model Number Modifier
A
— Revision Number
— Revision Number
Capacity (Btuh)
036
— 36,000
048
— 48,000
060
— 60,000
38
VM
A 036
H
D
S
3
-
1
System Type
H
— Heat Pump
Cabinet Type
S
— Standard
Variations
D —
Domestic
Packaging
1
— USA & Canada
B
— Revision Number
