Ducane (HVAC) 2HP13/14 - Manual (Page 3)

506162-02 Issue 0847 Page 3 of 14
Elevate Unit
Elevate unit per local clim ate and code requirem ents to
provide clearance above estim ated snowfall level and
ensure adequate drainage of unit. Use snow stand in
areas where prolonged freezing tem peratures are
encountered.
If conditions or local codes require the unit be attached
to pad or m ounting fram e, tie down bolts should be used
and fastened through knockouts provided in unit base pan.
Roof Top Installations
Mount on level platform or fram e 6 inches above roof
surface. Place unit above a load-bearing wall and isolate
unit and tubing set from structure. Arrange supporting
m em bers to adequately support unit and m inim ize
transm ission of vibration to building. Ensure roof structure
and anchoring m ethod is adequate for location. Consult
local codes governing rooftop applications.
Roof m ounted units exposed to winds above 5 m ph
m ay require wind baffles to achieve adequate defrost. A
sheet m etal baffle should be spaced 6-1/2" from the fall of
the coil. The height should cover the face of the coil and
the length should be 6" from the access panel.
NOTE: Unit m ust be level to within ± 2/ (± 3/8 in./ft) per
com pressor m anufacturer specifications.
Clearance Requirem ents
W hen installing, allow sufficient space for airflow
clearance, wiring, refrigerant piping, and service. For
proper airflow, quiet operation and m axim um efficiency.
Position so water, snow, or ice from roof or eaves cannot
fall directly on unit.
DO LOCATE THE UNIT:
! W ith proper clearances on sides and top of unit
! On a solid, level foundation or pad
! To m inim ize refrigerant line lengths
DO NOT LOCATE THE UNIT:
! On brick, concrete blocks or unstable surfaces
! Near clothes dryer exhaust vents
! Near sleeping area or near windows
! Under eaves where water, snow or ice can fall
directly on the unit
! with clearance less than 2 ft. from a second unit
! with clearance less than 4 ft. on top of unit
Operating Am bient
T he m inim um outdoor operating am bient in cooling
m ode is 55/F, and the m axim um outdoor operating
am bient in cooling m ode is 125/F. The m axim um outdoor
operating am bient in heating m ode is 66/F.
Indoor Coil Piston Selection
The outdoor heat pum p section m ust be m atched to a
factory approved indoor section. It is m andatory that the
installer ensure that the correct piston is installed in the
indoor section. If necessary rem ove the existing piston and
replace it with the correct piston See indoor unit
instructions for details of changing the piston. Contact
your distributor for accessory piston kits.
Indoor (Cooling) Piston Size
The evaporator coil may use an expansion valve (TXV) in place of piston.
NOTE: If a TXV is installed a hard start kit is required on
all m odels with reciprocating com pressors. See spec
sheet for proper kit selection.
14 SEER Heat Pum p M odels
All 14 SEER heat pum p m odels are only rated with TXV on
the indoor side.
Refrigeration Line Sets
Use only refrigerant grade copper tubes. Split
system s m ay be installed with up to 50 feet of line set (no
m ore than 20 feet vertical) without special consideration
(see long line set guidelines).
Accum ulation of water and ice in base pan m ay
cause equipm ent dam age.
13 SEER Heat Pum p Indoor Piston Sizes
Unit Size 2HP13 4HP13
18 .055 .051
24 .063 .055
30 .068 .059
36 .076 .070
42 .076 .070
48 .082 .082
60 .098 .082
14 SEER Heat Pum p Indoor TXV
Unit Size TXV Kit
18 thru 36 TXV3
42 thru 48 TXV5