Modine Manufacturing VFV Series Installation And Service Manual page 8

INSTALLATION
Piping Installation – Direct Expansion (DX)
Coils
IMPORTANT
1. Units with DX evaporator coils contain the refrigerant
R-410A. Review the R-410A Material Safety Data Sheet
(MSDS) for hazards and first aid measures.
2. Refrigerant charging should only be carried out by an EPA-
certified air conditioning contractor.
IMPORTANT
1. Les unités munies de serpentins évaporateurs DX
(reportez-vous à la nomenclature du modèle) contiennent
du fluide frigorigène R-410A. Pour les dangers et les
mesures de premiers soins, consultez la fiche signalétique
du R-410A.
2. L'ajout de frigorigène doit être confié à un spécialiste de
la climatisation certifié par l'agence de la protection de
l'environnement (EPA) du gouvernement américain.
Note:

R-410A refrigerant is the only approved refrigerant for
this system. The unit should be piped up in accordance
with good refrigeration and/or plumbing practices.
See Figure 20.1 through Figure 20.2, for suction and liquid
line connections. For units with a heating pipe package, see,
Figure 24.1 through Figure 24.4, for suction and liquid line
connections.
The outdoor condensing unit must be connected to the indoor
unit coil using field supplied refrigerant grade (ACR) copper
tubing that is internally clean and dry. Units should be installed
only with the tubing sizes for the approved system combination
as specified in Table 27.1.
Condensing unit is typically factory charged for a 15-foot
(4.6m) lineset. For additional lineset lengths please refer to
manufacturer's charging chart.
See the installation and maintenance manual provided with the
condensing unit for installation, evacuation and system charge
information.
8
Piping Installation - Steam Coils
Do not operate the units within steam pressure greater than
10 psig (68.9 kPa). Steam pressure must be 10 psig
(68.9 kPa) or lower to avoid excessive discharge air
temperatures that could cause burns or personal injury.
ATTENTION
Ne faites pas fonctionner l'unité lorsque la pression de vapeur
est supérieure à 10 lb/po² (68,9 kPa). La pression de vapeur
doit être de 10 lb/po² (68,9 kPa) ou moins pour éviter des
températures excessives de l'air d'évacuation qui pourraient
causer des brûlures ou des blessures.
1. Steam coils are supplied from the factory with 1" NPT
connections
2. A steam trap should be provided with a trap of sufficient
size and capacity to pass a minimum of two times the
normal condensate released by the unit at the minimum
differential pressure in the system.
3. See Figure 22.1 and Figure 22.2 for supply and return
connections. For units with a heating pipe package,
see Figure 26.1 and Figure 26.2 for supply and return
connections.
Piping Insulation
Standard Units
Chilled water and condensate pipes should be insulated right
up to the coil to prevent condensation which can damage
objects located below the piping. Chilled water valves must also
be insulated to prevent sweating. Hot water pipes should be
insulated to reduce heat loss and to prevent overheating of the
end compartment.
Units with Piping Package (not available on Ceiling
Mounted units)
Chilled water piping package will not be insulated except
when piping is routed through pipe tunnel. Chilled water
piping package shall be positioned over drain pans to catch
condensate that forms on piping.
14-500.7
CAUTION