Installation - Trane Axiom GWS Series Installation, Operation And Maintenance Manual

Installation

Foundation
N N O O T T I I C C E E
W W a a t t e e r r D D a a m m a a g g e e ! !
F F a a i i l l u u r r e e t t o o f f o o l l l l o o w w i i n n s s t t r r u u c c t t i i o o n n s s b b e e l l o o w w c c o o u u l l d d r r e e s s u u l l t t i i n n
e e q q u u i i p p m m e e n n t t a a n n d d p p r r o o p p e e r r t t y y d d a a m m a a g g e e . .
N N o o n n - - f f a a c c t t o o r r y y p p e e n n e e t t r r a a t t i i o o n n s s t t h h r r o o u u g g h h t t h h e e b b a a s s e e o o f f t t h h i i s s
u u n n i i t t a a r r e e n n o o t t a a l l l l o o w w e e d d . . A A n n y y p p e e n n e e t t r r a a t t i i o o n n i i n n t t h h e e b b a a s s e e
o o f f t t h h e e u u n n i i t t m m a a y y a a f f f f e e c c t t t t h h e e w w a a t t e e r r t t i i g g h h t t i i n n t t e e g g r r i i t t y y o o f f
t t h h e e u u n n i i t t a a n n d d l l e e a a d d t t o o w w a a t t e e r r l l e e a a k k s s i i n n t t o o t t h h e e
c c o o n n d d i i t t i i o o n n e e d d s s p p a a c c e e . .
N N o o t t e e s s : :
• For units with optional Condensate
Overflow Switch (COF), the switch will not
work properly if unit is not level or slightly
sloped toward switch.
• To assure proper condensate flow during
operation the unit and the curb must be
level.
If the unit is installed at ground level, elevate it above
the snow line. Provide concrete footings at each
support location with a "full perimeter" support
structure or a slab foundation for support. Refer to the
Unit Weights section for the unit's operating and point
loading weights when constructing a footing
foundation.
If anchoring is required, anchor the unit to the slab
using hold down bolts or isolators. Isolators should be
installed to minimize the transmission of vibrations
into the building.
For rooftop applications, ensure the roof is strong
enough to support the combined unit and support
structural weight.
W W A A R R N N I I N N G G
R R i i s s k k o o f f R R o o o o f f C C o o l l l l a a p p s s i i n n g g ! !
F F a a i i l l u u r r e e t t o o e e n n s s u u r r e e p p r r o o p p e e r r s s t t r r u u c c t t u u r r a a l l r r o o o o f f s s u u p p p p o o r r t t
c c o o u u l l d d c c a a u u s s e e t t h h e e r r o o o o f f t t o o c c o o l l l l a a p p s s e e , , w w h h i i c c h h c c o o u u l l d d
r r e e s s u u l l t t i i n n d d e e a a t t h h o o r r s s e e r r i i o o u u s s i i n n j j u u r r y y a a n n d d p p r r o o p p e e r r t t y y
d d a a m m a a g g e e . .
C C o o n n f f i i r r m m w w i i t t h h a a s s t t r r u u c c t t u u r r a a l l e e n n g g i i n n e e e e r r t t h h a a t t t t h h e e r r o o o o f f
s s t t r r u u c c t t u u r r e e i i s s s s t t r r o o n n g g e e n n o o u u g g h h t t o o s s u u p p p p o o r r t t t t h h e e
c c o o m m b b i i n n e e d d w w e e i i g g h h t t o o f f t t h h e e r r o o o o f f c c u u r r b b , , t t h h e e u u n n i i t t , , a a n n d d a a n n y y
a a c c c c e e s s s s o o r r i i e e s s . .
If anchoring is required, anchor the unit to the roof with
hold-down bolts or isolators.
Check with a roofing contractor for proper
waterproofing procedures.
34
Ductwork
Elbows with turning vanes or splitters are
recommended to minimize air noise due to turbulence
and to reduce static pressure.
When attaching the ductwork to the unit, provide a
water- tight flexible connector at the unit to prevent
operating sounds from transmitting through the
ductwork.
All outdoor ductwork between the unit and the
structure should be weather proofed after installation is
completed.
N N o o t t e e : : For sound consideration, cut only the holes in the
roof deck for the ductwork penetrations. Do not
cut out the entire roof deck within the curb
perimeter.
Roof Curb
The roof curbs for these units consists of a "full
perimeter" enclosure to support the unit just inside of
the unit base rail.
Before installing any roof curb, verify:
• It is the correct curb for the unit.
• The necessary gaskets and hardware are included.
• The purposed installation location provides the
required clearance for proper operation.
• Ensure that the curb is level and square. The top
surface of the curb must be true to assure an
adequate curb-to-unit seal.
Step-by-step curb assembly and installation
instructions ship with each accessory roof curb kit.
Follow the instructions carefully to ensure proper fit-up
when the unit is set into place.
N N o o t t e e : : To ensure proper condensate flow during
operation, as well as proper operation of the
condensate overflow switch (if equipped), the
unit and curb must be level.
If the unit is elevated, a field constructed catwalk
around the unit is strongly recommended to provide
easy access for unit maintenance and service.
Recommendations for installing the Supply Air and
Return Air ductwork joining the roof curb are included
in the curb instruction booklet. Curb ductwork must be
fabricated and installed by the installing contractor
before the unit is set into place.
N N o o t t e e : : For sound consideration, cut only the holes in the
roof deck for the ductwork penetrations. Do not
cut out the entire roof deck within the curb
perimeter.
If a Curb Accessory Kit is Not Used:
• The ductwork can be attached directly to the
factory-provided flanges around the unit's supply
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