WSHP-PRC001-EN 89
Ducted Panel
The return-air arrangement may be
easily converted from a free return-air
system, to a ducted return-air system
with the addition of a return-air side
panel. By replacing the filter racks with
the return-air panel, a complete seal
from the duct to the unit is possible.
The 1 1/2" duct flange facilitates ease
of field connection to the mechanical
system. This accessory is typically
used when the return-air filter is
placed in a built-in ceiling grille, or
placed within a field provided filter
rack assembly. See Figure 44 for re-
turn-air duct panel.
Figure 44: Return-air duct panel
Unit
Size
A B Part Number
006-015 17 1/2" 13" 4474 1133 0100
018-030 20 1/2" 15" 4474 1134 0100
036-042 22 1/2" 17" 4474 1135 0100
048-060 26 1/2" 19" 4474 1136 0100
Hose Kits
Trane provides three hose kit selections for equipment balancing.
• Ball valve flow control
(manual)
• Circuit setter flow control
(manual)
• Automatic flow control
(automatic)
Each selection provides some accuracy in equipment balancing. Range of accu-
racy consist of ±25% for the ball valve method, ±20% for the circuit setter method,
and ±10% for the automatic flow control method.
Utilizing the ball valve method, the pressure/temperature measurement on the
leaving and entering side of the heat pump is measured within the water piping.
The ball valve is then throttled to change the amount of flow to the unit to reach
the desired temperature or pressure differential.
The circuit setter method combines both the readout and the adjustment feature
in one device. In order to determine flow rate, the user must record both handle
position, and differential pressure drop. Then, the user must consult a chart con-
taining both pieces of information to make the necessary adjustments to the cir-
cuit setter.
For automatic system balancing of a water-source heat pump, the
Mesurflo® self balancing kit provides a constant flow rate over the pressure dif-
ferential rage of 2 to 80 psid. As system pressure changes (through further addi-
tion of heat pumps, for example) each individual flow control valve will
automatically adjust to the new system conditions. In variable water volume ap-
plications, a self balancing hose kit can provide continuous balancing because of
its ability to automatically adjust to the varying system conditions. For more in-
formation pertaining to the automatic balancing hose kits, see literature
documentation WSHP-SLB005-EN. See Figure 45 for system balancing hose kits.
Accessories
Figure 45: System balancing hose kits
