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8
WSHP-SVX01W-EN
General Information
Unit Description
Before shipment, each unit is leak tested, dehydrated,
charged with refrigerant and run tested for proper control
operation.
Air-to-Refrigerant Coil
The air-to-refrigerant coil is aluminum fin, mechanically
bonded to the copper tubing.
Water-to-Refrigerant Coil
The water-to-refrigerant coil is a copper or cupro-nickel
(option) and steel tube (tube-within-a-tube) design, leak
tested to assure there is no cross leakage between the
water tube (copper/cupro-nickel) and refrigerant gas (steel
tube).
Table 1.
High/low pressure switch
Trip
Recover
Unit
LP
40 +/-4
56 +/-4
psig
HP
650 +/-10
550 +/-10
psig
Controls
The Deluxe 24V control option is available for all unit sizes.
Tracer
®
ZN524, LonTalk
®
certified control option is
available for all unit sizes. UC400 and UC400 with wireless
comm BACnet
®
is available in all unit sizes.
All power wiring to the equipment is made at the unit
contactor for 0.5 to 5 ton, 1-phase units. For 3-phase units
all power wiring to the equipment is made to the contactor
or power block. For EXH/V070 units all power wiring to the
equipment is made to the power block. For the GEH/V 6 to
25 tons units all power wiring is made to the high voltage
terminal block. All low-voltage wiring is made at the unit’s
low voltage terminal board. EXH and EXV 460V units
require a neutral wire.
System Input Devices and Functions
A thermostat, zone sensor, or building automation system
is required to operate the water-source heat pump. The
flexibility of having several mode capabilities depends
upon the type of sensor and/or remote panel selected.
Troubleshooting and connection diagrams for the 24V
control systems may be located in the back of this manual.
All digital control troubleshooting tips and connection
diagrams are located in CNT-SVX11*-EN (ZN524). All
digital control troubleshooting tips and connection
diagrams are located in BAS-SVX065*-EN (UC400).
Deluxe 24V Controls (Option)
Units containing the Deluxe 24V control design will
incorporate a microprocessor-based control board. The
Trane® microprocessor board is factory wired to a
terminal strip to provide all necessary terminals for field
connection. The deluxe board is equipped with a random
start relay, anti-short cycle timer, brown out protection,
compressor disable, condensate overflow, unit safety
control, diagnostics, and a generic relay (which may be
available for field use). See
for diagnostic
information and
thermostat connections.
Tracer
®
UC400 (Option)
The Tracer® UC400 is a BTL Listed BACnet® controller that
can operate stand- alone or within a Building Automations
system such as Tracer
®
SC. For installation, operation and
Programming, see BAS-SVX065*-EN (UC400).
Tracer
®
ZN524 Controls (Option)
The digital ZN524 controller is designed to support the 0.5
to 25 ton water-source heat pumps as a standalone or full
building automation (open protocol) system.
For installation, operation and diagnostics see CNT-
SVX11*-EN (ZN524).
Pump Module (Field Installed Accessory)
The pump module shall consist of either a single or dual 1/
6 HP bronze pump and a brass three-way shut-off valve.
Cast iron pumps are also available. The pump module kits
shall contain the necessary components for the
installation, operation and maintenance of the water
circuit of a closed-loop distributed pumping application.
Waterside Economizer (Option)
Instructions for mechanical connection of the waterside
economizer to the water-source heat pump may be found
in the dimensional section of this manual.
The waterside economizer is designed to begin
economizing mode when water temperatures fall below
the field adjustable temperature of 25, 35, 45, 55 or 60°F
(for the Deluxe control option), or below the programmed
set-point (for the ZN524 or UC400 control option).
When the temperature is less than the setpoint, fluid will
flow into the economizing coil, while simultaneously
halting mechanical operation of the compressor.
Mechanical cooling will continue on a call for a second
stage from the thermostat or system control. Entering
water temperature sensor is factory provided for field
installation on the entering water side of the coil.
Boilerless Control/Electric Heat (Option)
Systems that do not contain a boiler may contain a
boilerless control with electric heat. Trane
®
offers both a
factory mounted electric heat option (0.5 to 5 ton only),
and a field mounted duct heater option.
If the 0.5 to 5 ton GEH, GEV and EXH/V070 unit
incorporates the factory mounted option, the unit will ship
from the factory with an internally mounted nichrome
open wire heating element, designed to start-up electric
heat as the systems primary heat in the event entering
water temperature falls below 55°F. Once the entering
water temperature rises above 60°F, the boilerless
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