Product data

4
Accessory output — A 24-v output
is provided to cycle a motorized water
valve or damper actuator with com-
pressor in applications such as variable
speed pumping arrangements.
Performance Monitor (PM) — This
unique feature monitors water temper-
atures to warn when the heat pump is
operating inefficiently or beyond
typical operating range. Field
selectable switch initiates a warning
code on the unit display.
Water coil freeze protection (se-
lectable for water or antifreeze) —
The field selectable switch for water
and water/glycol solution systems initi-
ates a fault when temperatures exceed
the selected limit for 30 continuous
seconds.
Air coil freeze protection (check
filter operation) — The field select-
able switch for assessing excessive filter
pressure drop initiates a fault when
temperatures exceed the selected limit
for 30 continuous seconds.
Alarm relay setting — A selectable
24-v or pilot duty dry contact provides
activation of a remote alarm.
Electric heat option — The output
provided on the controller operates
two stages of emergency electric heat.
Service Test mode with diagnostic
LED (light-emitting diode) — The
Service Test mode allows service per-
sonnel to check the operation of the
WSHP and control system efficiently.
Upon entering Service Test mode,
time delays are sped up, and the Status
LED will flash a code to indicate the
last fault experienced for easy diagno-
sis. Based on the fault code flashed by
the status LED, system diagnostics are
assisted through the use of Carrier pro-
vided troubleshooting tables for easy
reference to typical problems.
LED visual output — An LED panel
indicates high pressure, low pressure,
low voltage, high voltage, air/water
freeze protection, condensate over-
flow, and control status.
WSHP Open multiple protocol
controller — Carrier's state of the art
water source heat pump multiple pro-
tocol controller is capable of communi-
cating BACnet*, Modbus†, N2 and
LON (with a separate card) protocols.
The controller is designed specifically
for Carrier's WSHPs in order to bring
more features and benefits to the units
such as waterside economizer control,
auxiliary heat, dehumidification, etc., in
addition to independent compressor
and fan operation. The WSHP Open
controller can be used to actively moni-
tor and control all modes of operation
as well as monitor the following diag-
nostics and features: unit number, zone
temperature, zone set point, zone hu-
midity set point, discharge air tempera-
tures, fan status, stages of heating,
stages of cooling, outdoor-air tempera-
ture, leaving-air temperature, leaving
water temperature, alarm status, and
alarm lockout condition.
The controller also provides a pro-
active approach to maintenance and
service enabling the unit to recognize
and correct operating conditions out-
side of recommended operating condi-
tions avoiding the need to manually re-
start equipment. From a system stand-
point WSHP Open controller can
accept both water and airside linkage.
Condenser water linkage provides
optimized water loop operation using
the UC (universal controller) Open XP
loop controller. Loop pump operation
is automatically controlled by WSHP
equipment occupancy schedules, unoc-
cupied demand and tenant override
conditions. Positive pump status feed-
back prevents nuisance fault trips.
Airside linkage enables the WSHP
equipment to be completely integrated
with the Carrier's VVT
®
application as
a system. The WSHP Open controller
responds to individual zone demands
rather than average temperature condi-
tions to provide individual temperature
control in each zone.
This controller has a 38.4 kilobaud
communications capability and is com-
patible with i-Vu
®
Open building auto-
mation system controls and CCN con-
trols. The addition of the Carrier CO
2
sensor in the conditioned space pro-
vides ASHRAE 62 compliance and de-
mand controlled ventilation (DCV). A
DCV control strategy is especially ben-
eficial for a water source heat pump
system to minimize the energy utilized
to condition ventilation air. In combina-
tion with energy efficient Aquazone
units, DCV may be the most energy ef-
ficient approach ever developed for a
water source heat pump system.
The WSHP Open multiple protocol
controller is designed specifically for
constant volume (CV) and variable
volume and temperature (VVT
®
) appli-
cations. This comprehensive controls
system allows water source heat pumps
to be linked together to create a fully
functional HVAC (heating, ventilation,
and air conditioning) automation
system.
PremierLink™ controller adds
reliability, efficiency, and
simplification
The PremierLink direct digital control-
ler can be ordered as a factory-installed
option. Designed and manufactured
exclusively by Carrier, the controller
can be used to actively monitor and
control all modes of operation as well
as monitor the following diagnostics
and features: unit number, zone tem-
perature, zone set point, zone humidity
set point, discharge air temperatures,
fan status, stages of heating, stages of
cooling, outdoor-air temperature, leav-
ing-air temperature, leaving water tem-
perature, alarm status, and alarm lock-
out condition.
This controller has a 38.4 kilobaud
communications capability and is
compatible with i-Vu Open building au-
tomation system controls and CCN
controls. The addition of the Carrier
CO
2
sensor in the conditioned space
provides ASHRAE 62-99 compliance
and demand controlled ventilation
(DCV). A DCV control strategy is espe-
cially beneficial for a water source heat
pump system to minimize the energy
utilized to condition ventilation air. In
combination with energy efficient
Aquazone units, DCV may be the most
energy efficient approach ever devel-
oped for a water source heat pump
system.
The PremierLink peer-to-peer, Inter-
net ready communicating control is de-
signed specifically for constant volume
(CV) and variable volume and temper-
ature (VVT
®
) applications. This com-
prehensive controls system allows wa-
ter source heat pumps to be linked to-
gether to create a fully functional
HVAC (heating, ventilation, and air
conditioning) automation system.
LON protocol for diverse control
— The LON controller option is ideal
when building automation requires
interoperability across diverse control
platforms. This LONMark** compliant
offering can operate as standalone
or as a part of Local Operating
Network (LON) via the LonWorks
**
FTT-10 Free Topology communication
network. Factory completed pre-engi-
neered applications specific to Aqua-
zone water source heat pumps and
Features/Benefits (cont)