National Comfort Product CPG41238-U Series Installation manual - Drainage
Installation Guide for Comfort Pack (CPG) Units
6
enough to allow for return air provisions to the unit. To reduce
the possible transmission of sound and vibration, a resilient
material such as rubber or cork should be installed between the
support and the base of the unit. All spaces around the top, sides
and bottom of the exterior grille area should be caulked and
sealed to the wall, making sure that the openings for drainage in
the bottom edge are not blocked.
If the optional wall sleeve is used, caulk the spaces between the
sleeve and the wall. Completely fill the clearance on all sides
between the unit and the wall sleeve with a polyurethane foam
sealant (follow manufacturer’s suggested application manual).
Provide the unit with support inside the building in the area of
the return air opening. Slide the unit into the wall sleeve and
fasten the unit to the sleeve with the five screws provided with
the sleeve.
NOTE: For ease of installation, install the cabinet
into the wall sleeve first without the cooling
chassis. Then slide cooling chassis in after
cabinet is in place.
Drainage
The 3/4” I.D. flexible tubing included should be connected to the
Comfort Pack primary drain connection so that it can easily be
disconnected if the cooling chassis must be removed. A trap at
least 2” deep should be provided close to the drain pan. The
tubing should not be higher than the bottom of the unit drain
pan at any point to assure proper drainage and allow chassis
removal. The drain line should pitch downward at least 1” per 10
ft. to an open building drain trap.
SECONDARY DRAIN TRAP
MUST BE INSTALLED
Drain Pan
3/4” I.D. Flexible Tubing Included
2”
min.
Pitch Downward 1” per 10ft.
Shaded Area Represents Components
Provided and Installed By Others
Highest Point Must Not Be Above
Bottom of Drain Pan
3/4” O.D. Drain Connection
(Primary Drain)
Be sure that the electrical service provided to the building can
handle the load imposed by the unit.
IMPORTANT — This Document is customer property and is to
remain with this unit. Please refer to service information pack
upon completion of work to register the unit’s warranty. These
instructions do not cover all variations in systems or provide
for every possible contingency to be met in connection with the
installation. Should further information be desired or should
particular problems arise which are not covered sufficiently
for the purchaser’s purposes, the matter should be referred to
your installing dealer or local distributor before contacting the
manufacture.
NOTE: THE UNIT MUST NEVER BE PLACED
ON ITS SIDE OR UPSIDE DOWN AS THE
COMPRESSOR OIL WILL RUN IN THE COOLING
CIRCUIT AND SERIOUSLY DAMAGE THE UNIT.
Installation
NOTE: These installation and maintenance
instructions should be left with the unit for
future reference.
INSTALLATION:
This unit must be installed in accordance with
all applicable codes. This unit is not to be used
for temporary heating of buildings or structures under
construction.
FOR MAXIMUM PERFORMANCE, IT IS IMPERATIVE THAT
THE COOLING CHASSIS AIR DIVIDER BE SEALED TO THE
CABINET AIR SEAL. ANY LEAKAGE WILL ALLOW OUTSIDE
UNCONDITIONED AIR TO INFILTRATE AND MIX WITH THE
CONDITIONED AIR. THIS CONDITION WILL DEGRADE UNIT
PERFORMANCE. ALL UNITS SHOULD BE INSPECTED FOR
THIS CONDITION, AS DURING TRANSPORTATION AND
INSTALLATION THE SEALS CAN BE DISTURBED. IF REQUIRED,
A LIGHT BEAD OF CAULKING IS RECOMMENDED TO SEAL THE
CHASSIS, TO THE AIR SEAL TO ELIMINATE LEAKAGE.
OUTSIDE/UNCONDITIONED AIR MUST NOT BE INTRODUCED
INTO THE RETURN AIR STREAM OF THIS UNIT. THIS
CONDITION WILL ALSO DEGRADE THE PERFORMANCE
OF THE UNIT AND MAY VOID EQUIPMENT WARRANTY.
The unit should be provided with support inside the building in
the area of the return air opening. The support should be high