Mammoth V-Cube - Manual (Page 13)

Coil.or.Water.Cooled.Condenser.(WCC).Piping.Connections
Connections to the unit coil (water, steam or non-inte-
grated direct expansion, WCC or humidifier) are by others.
Refer to the mechanical drawings and the instructions
on the casing for correct orientation of external piping.
External supply and return piping connection, provision,
design and all other safety, freeze protection or electrical
control requirements for system operation are the sole
responsibility of the Installing Contractor and/or Design
Engineer. Refer to ASHRAE handbooks and local building
codes for correct piping and electrical control for proper
installations. Refer to the mechanical drawings for coil per-
formance design information.
For WCC units, see Appendix A . See the piping schematics
for optional piping components and sequence of opera-
tion for electrical control options or interlocks supplied
with the unit.
Condensate.Drain.Trap.and.Lines
Cooling coils, humidifiers or other options that can pro-
duce condensation are provided with a drain pan with a
1¼” [32 mm] MPT (Male Pipe Thread) drain connection.
A drain trap and condensate line of equal size must be
field provided by the Installing Contractor on the drain
connections and coupled to the building drainage system
to prevent air or sewer gases from being pulled into the
unit caused by the negative (suction) pressure and forcing
water out of the pan into the unit or from air escaping
into the drain caused by positive pressure. See
Appendix
B for illustrations and dimensional information on positive
and negative pressure trapping height. Slope the drain
lines downward in direction of flow not less than 1/8” per
foot toward the building drainage system; otherwise, use
a condensate pump. Refer to local codes for proper drain-
age requirements. Installing a plug for cleaning of the trap
is recommended. Fill the P-traps with water before starting
the unit. Check and clear drains annually at start of cool-
ing season. Drainage problems can occur should drains be
inactive and dry out or due to reduced water flow caused
by buildup of algae. Regular maintenance will prevent
these from occurring.
CAUTION
Internal coil (water, steam or non-integrated direct ex-
pansion), WCC piping connections within the unit may
only be field extended through the cabinet within desig-
nated areas. Connections to the unit coil (water, steam
or nonintegrated direct expansion, WCC) are by others.
External supply and return piping connection, provision,
design and all other safety (such as dielectric couplings
or other), freeze protection or electrical control require-
ments for system operation are the sole responsibility of
the Installing Contractor and/or Design Engineer. Refer to
ASHRAE handbooks and local building codes for correct
piping and electrical control for proper installations. Refer
to the mechanical drawings for coil performance design
information.
CAUTION
A water and glycol mixture is used for factory tests and
to prevent any possibility of freezing during transit and/
or storage. In units that include factory installed water
piping, some glycol may remain in the system. Flush the
system in the field, prior to installation, if no glycol traces
are desired. In low temperature applications, the water
supply line and return line should be insulated to prevent
condensate and an antifreeze solution should be used to
protect water-to-refrigerant heat exchanger from freez-
ing damage.
IMPORTANT
A hydrostatic test must be performed in the field by the
Installing Contractor at 1.25 times the operating pressure
on all equipment involving piping connections to verify
that the installed unit and its connections to the network
are free of leaks prior to the unit being set in operation.
This test shall be performed after the unit is completely
piped to the network and shall cover the connections
between the unit and the network, as well as all internal
components of the unit.
VCES-V-CUBE-IOM-1A 13