Trane Axiom GEHB Installation Operation & Maintenance page 13

Water supply/return system
design
Unit main water system design is
optional from central and distributed
model.
CENTRAL WATER SUPPLY SYSTEM
is characterized as a system with a
single pump typically furnished in
the cell or machine room which is
responsible for the supply/return water
for the whole building and may be
superseded by a backup pump in time
of malfunction.
A typical central water supply system is
shown is Figure 12 and characterized
as hereafter.
1 . C o n n e c t s u p p l y / r e t u r n j o i n t
components to according unit hoses.
Trane has a variety of composition
of joint components for the best
regulation of water system balance.
Flexible connection is always used to
alleviate and isolate vibration from the
rigid main pipeline.
2.High voltage wiring is at the left
corner of unit, where a wiring hole is
reserved.
3.Connect to line voltage disconnect
switch, which is field supplied.
4.Supply/return pipeline of a central
water supply system must be sized
N O N D U C TED
( F REE)
RETU R N - AI R
FIL TER FILACCESS
(DUAL SIDED)
ALLOW MI N I M U M
9-1/ 2 I N C H
CEI L I N G
RECESSED LI G H TI N
FOR U N I T CLEARAN C E
Figure 12 Design sample of central
water supply system
Installation and checklist
capable of providing adequate flow
rate when system operates at pressure
loss minimum.
Caution
will sweat with water flow in low
t e m p e r a t u r e . W h e n d e s i g n e d t o
operate in temperature lower than
o
16 C, pipe sweat must be avoided with
a insulation coat.
5.For installation in noise-sensitive
places, a horizontal layer of noise-
proof glass fibre 6" in thickness and
two size of unit base must be padded
beneath the unit to attenuate operation
noise.
D I S T R I B U T E D WAT E R S U P P LY
SYSTEM is characterized as a system
with either a single pump or a couple
of pumps, which connect directly to
supply/return hose. Each pump in such
a system must be special in size for
use in one location of water source
heat pump system. Figure 13 shows a
typical distributed water supply system,
which is characterized as the following.
1 . P i p e c o n n e c t i o n s a r e u s e d t o
connect between unit water in/out and
system supply/return pipe. Trane has
a variety of pipe connections for better
regulation of water system balance.
Flexible joint pipe is always used to
OF
BETWEEN
G R I D A N D
G
Supply/return water pipeline
11
alleviate and isolate vibration from the
main water pipeline.
2.High voltage wiring is at the left
corner of unit, where a wiring hole is
reserved.
3.Connect to line voltage disconnect
switch, which is field supplied.
4.A independent pump supply system
is constructed with pump and relative
flexible pipes. Each pump device is a
whole assembly ready to connect to
water and electricity system, which
is designed with flow rate maximum
of 1.3L/s according to some practical
requirements.
5.Supply/return pipeline of a central
water supply system must be sized
capable of providing adequate flow
rate when system operates at pressure
loss minimum.
Supply/return water pipeline
Caution
will sweat with water flow in low
t e m p e r a t u r e . W h e n d e s i g n e d t o
operate in temperature lower than
o
16 C, pipe sweat must be avoided with
a insulation coat.
6.For installation in noise-sensitive
places, a horizontal layer of noise-
proof glass fibre 6" in thickness and
two size of unit base must be padded
beneath the unit to attenuate operation
noise.
SHUT-OFF
VALVE
NON DUCTED
(FREE)
RETURN-AIR
FILTER ACCESS
(DUAL SIDED)
ALLOW MINIMUM OF
9-1/2 INCH BETWEEN
CEILING GRID AND
RECESSED LIGHTING
FOR UNIT CLEARANCE
Figure 13 Connection sample of distributed
water supply/return system