CNPVU
CNRVU
Installation Instructions
Uncased Coils
Upflow - Downflow
Heating - Cooling
NOTE
: Read the entire instruction manual before starting the
installation.
TABLE OF CONTENTS
PAGE
SAFETY CONSIDERATIONS
1
. . . . . . . . . . . . . . . . . . . . . . . . .
INTRODUCTION
1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INSTALLATION
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Procedure 1 — Inspect Equipment
2
. . . . . . . . . . . . . . . . . . . .
Procedure 2 — Select Installation
3
. . . . . . . . . . . . . . . . . . . .
Procedure 3 — Installation of Evaporator Coil
4
. . . . . . . . . . .
Procedure 4 — Connect Refrigerant Piping
6
. . . . . . . . . . . . .
Procedure 5 — Connect Refrigerant Liquid
and Suction Lines
6
. . . . . . . . . . . . . . . . . . . .
Procedure 6 — Condensate Drain Line Connection
7
. . . . . . .
Procedure 7 — Humidifier Application
8
. . . . . . . . . . . . . . . .
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service, maintenance,
or use can cause explosion, fire, electrical shock, or other
conditions which may cause death, personal injury or property
damage. Consult a qualified installer, service agency, or your
distributor or branch for information or assistance. The qualified
installer or agency must use factory
−
authorized kits or accessories
when modifying this product. Refer to the individual instructions
packaged with the kits or accessories when installing.
Follow all safety codes. Wear safety glasses, protective clothing,
and work gloves. Use quenching cloth for brazing operations.
Have fire extinguisher available. Read these instructions
thoroughly and follow all warning or cautions included in literature
and attached to the unit. Consult local building codes and the
current editions of the National Electrical Code (NEC) NFPA 70.
In Canada, refer to the current editions of the Canadian Electrical
Code CSA C22.1.
Recognize safety information. When you see this symbol
on
the unit and in instructions or manuals, be alert to the potential for
personal injury. Understand the signal words
DANGER
,
WARNING
,
CAUTION
, and
NOTE
. These words are used with
the safety
−
alert symbol.
DANGER
identifies the most serious
hazards which
will
result in severe personal injury or death.
WARNING
signifies hazards which
could
result in personal injury
or death.
CAUTION
is used to identify unsafe practices which
may
result in minor personal injury or product and property
damage.
NOTE
is used to highlight suggestions which
will
result
in enhanced installation, reliability, or operation.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
Before installing or servicing system, always turn off main
power to system. There may be more than one disconnect
switch. Tag disconnect switch with a suitable warning label.
Turn off accessory heater power if applicable.
!
WARNING
UNIT OR PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in product or
property damage.
This coil contains Nitrogen precharge of 15 PSI. Release of
this pressure through the center of the rubber plugs is
required before removing the plugs.
CAUTION
!
CUT HAZARD
Failure to follow this caution may result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use care and
wear appropriate protective clothing and gloves when
handling parts.
CAUTION
!
IMPORTANT
: Nitrogen can leak out through the hole that the
needle pierced in the plugs. This does not indicate a leaking coil
nor warrant return of the coil.
INTRODUCTION
Use this instruction manual to install indoor coils on upflow or
downflow furnaces. (See Fig. 1.) Do not install coil in horizontal
position. Models CNPVU/CNRVU have factory
−
installed
thermostatic expansion valves (TXVs). CNPVU models are used
with Puron
r
refrigerant (R410A) systems and CNRVU models are
used with R
−
22 systems.
