MORTEXPRODUCTSINC.501TERMINALRDFORTWORTH,TEXAS76106 Page15
CONDENSATE DRAIN PIPING:
The horizontal Air Handler cooling DX coil condensate drain
pan has one ¾” NPT female primary and one ¾” NPT female
secondary connection is on the same side as the refrigerant
connections. The other side of the condensate drain pan is one
¾” NPT female primary drain connection and no secondary
drain connections. Refer to figure 15 for drain locations.
Figure 15: Condensate Drain Pan
Piping from each fitting used is to have 1-1/2 minimum trap and
each run in such a manner as to provide enough slope for
adequate drainage to a visible area. Do not pipe these two
fittings together into a common drain. Cap unused connection.
Figure 16: Typical Condensate Traps
SECTION VII: HOT AND CHILLER WATER
Water Piping
All piping must be supported independent of coils to prevent
vibration and stress on coil headers. Swing joints or flexible
fittings must be provided to absorb expansion and contraction
strains. Rigid piping reduces the effectiveness of vibration
isolators. Coil water pipes must be adequately vented in order to
prevent air binding. Units are provided with manual air vents
mounted on coil manifold.
"Massachusetts requires an electronically controlled
pump timer that activates the pump every 6 hours
water heater and the air handler to 50 feet max."
for 60 seconds and limits the distance between the
Total hot water piping should not exceed 140 feet. All hot water
piping to the coil should be 3/4 inch ID (7/8 inch OD) copper.
CPVC piping may be used in applications where the water
temperature does not exceed 150°F. It is recommended a water
isolation valve and a union be placed in the water lines to and
from the coil, near the coil, for serviceability, repair or
replacement of the coil.
After piping has been installed, allow the system to fill with
water and check connections for leaks. To insure complete
filling of the system, follow start-up procedure.
A thermal expansion tank is recommended on any closed loop
system to relieve thermal expansion due to pressure increase.
Horizontal Air Handler Unit must be located so that if any
connections should leak, water will not cause damage to
the adjacent area.
When such locations can’t be avoided, a suitable drain pan
should be installed under the air handler, not over 1-1/2”
deep, with minimum length and width at least 2” greater
than the air handler dimensions and connected to an
adequate drain.
Under no circumstances is the manufacturer to be held
liable for any water damage in connection with this
Horizontal Air Handler Unit.
Horizontal Air Handler Unit must be located so that if any
connections should leak, water will not cause damage to
the adjacent area.
When such locations can’t be avoided, a suitable drain pan
should be installed under the air handler, not over 1-1/2”
deep, with minimum length and width at least 2” greater
than the air handler dimensions and connected to an
adequate drain.
Under no circumstances is the manufacturer to be held
liable for any water damage in connection with this
horizontal Air Handle
unit.
Toxic chemicals used for treatment of boilers or non-
potable water heating appliances shall never be introduced
into a potable water space heating system.
When system requires water at temperatures higher than
required for other uses, a means such as a mixing valve
shall be installed to temper the water for those uses in order
to reduce the scald hazard potential.
Hot water from a boiler used to satisfy heating requirements
can be heated to temperatures of 180°F. Parts containing
water this hot can scald very quickly. Use extreme caution
when servicing or performing maintenance on any parts
containing hot water.
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