Specifications

Page 32 of 76 SmartSource 2-Stage Water Source Heat Pumps Catalog 1114-1
Applications
Condensate Drain
Vertical units are factory provided with a condensate drain
trap located inside the cabinet. Condensate removal piping
must be pitched away from the unit not less than 1/4" per
foot. A vent is required after the trap so that the condensate
will drain away from the unit. The vent can also act as a
clean out if the trap becomes clogged. To avoid having
waste gases entering the building, the condensate drain
should not be directly piped to a drain/waste/vent stack. See
local codes for the correct application of condensate piping
to drains.
Figure20:Condensatetrapdetail
C
A
B
7/8" I.D. Clear Plastic
Improper trapping can lead to several problems. If the trap
is too tall, negative pressure will prevent drainage, causing
condensate backup. If the trap is too short the seal will be
destroyed or nonexistent, producing the same effect as a
non-trapped system.
Construct the trap of 7/8" clear plastic piping. The conden-
sate piping from the drain trap must be sloped to facilitate
proper drainage. The clear plastic trap should be clamped
and removable for cleaning. It may be necessary to manu-
ally ll the trap at system startup, or to run the unit for
sufcient time to build a condensate seal. The condensate
trap and condensate piping drainage should be free of any
foreign debris. Debris can prevent proper drainage and unit
operation and result in condensate buildup.
Table13:Condensatedrainstaticpressures
Static Pressure A B C
Standard 1-1/4" 5/8" 2-3/4"
High 1-1/2" 3/4" 3-1/8"
Operating Limits
Table14: Air limits in °F(°C)
Air Limits
Standard Range Units Geothermal Range Units
Cooling Heating Cooling Heating
Minimum Ambient Air
1
50°F (10°C) 50°F (10°C) 40°F (4°C) 40°F (4°C)
Rated Ambient 80°F (27°C) 70°F (21°C) 80°F (27°C) 70°F (21°C)
Maximum Ambient Air
2
100°F (38°C) 85°F (29°C) 100°F (38°C) 85°F (29°C)
Minimum Entering Air
1
50°F (10°C) 50°F (10°C) 50°F (10°C) 40°F (4°C)
Rated Entering Air 80/67°F (27°/19°C) 70°F (21°C) 80/67°F (27°/19°C) 70°F (21°C)
Maximum Entering Air
2
100/83°F (38/28°C) 80°F (27°C) 100/83°F (38/28°C) 80°F (27°C)
Table15: Water limits
Water Limits
Standard Range Units Geothermal Range Units
Cooling Heating Cooling Heating
Minimum Entering Water 55°F (13°C) 55°F (13°C) 30°F (-1°C) 20°F (-6°C)
Normal Entering Water 85°F (29°C) 70°F (21°C) 77°F (25°C) 40°F (4°C)
Maximum Entering Water 110°F (43°C) 90°F (32°C) 110°F (43°C) 90°F (32°C)
Minimum GPM/Ton 1.5
Nominal GPM/Ton 3.0
Maximum GPM/Ton 4.0
Notes: 1. Maximum and minimum values may not be combined. If one value is at maximum or minimum, the other two
conditions may not exceed the normal condition for standard units. Extended range units may combine any two
maximum conditions, but not more than two, with all other conditions being normal conditions.
2. This is not a normal or continuous operating condition. It is assumed that such a start-up is for the purpose of
bringing the building space up to occupancy temperature.