Product data

59
j. Boilerless system control can switch automati-
cally to electric heat at low loop water
temperature.
k. Dehumidistat input providing fan control
for dehumidification operation via the Ideal-
Humidity™ system.
l. Multiple units connected to one sensor pro-
viding communication for up to 3 water
source heat pumps.
m. Selection of boilerless changeover tempera-
ture set point.
n. Compressor relay staging for dual stage units
or in master/slave applications.
Units not having automatic low sensible heat
ratio cooling will not be accepted; as an alter-
nate, a hot gas reheat coil may be provided with
control system for automatic activation.
5. WSHP Open Multiple Protocol Control:
Units shall have all the features above (either C
or D boards) and the state of the art WSHP
Open multiple protocol interface board. All
point objects will have the ability to be viewed in
the BACview
6
Handheld user interface. This
will permit all units to be daisy chain connected
by a 2-wire twisted pair shielded cable. The fol-
lowing points must be available at a central or
remote computer location:
a. space temperature
b. leaving water temperature
c. discharge air temperature
d. command of space temperature set point
e. cooling status
f. heating status
g. low temperature sensor alarm
h. high pressure switch alarm
i. fan on/off position of space thermostat
j. unoccupied/occupied command
k. cooling demand
l. heating demand
m. fan “ON/AUTO” command
n. fault prevention with auto reset
o. itemized fault code viewed with BACview
interface
Additional WSHP Open multiple protocol con-
trol features shall include:
a. two-position OA damper
b. modulating OA damper with DCV
c. auxiliary modulating hot water/steam
heating
d. two-position hot water/steam heating
e. single stage electric auxiliary heat
f. auto fan speed control (heating/cooling)
g. power fail restart delay
h. dehumidification
i. modulating water economizer control
j. two-position water economizer control
6. PremierLink™ Controller:
This optional control will function with
CCN (Carrier Comfort Network
®
) and
ComfortVIEW™ software. It shall also be com-
patible with ComfortLink™ controllers. It shall
be ASHRAE 62 compliant and Internet ready.
It shall accept a CO
2
sensor in the conditioned
space and be demand controlled ventilation
(DCV) ready. The communication rate must be
38.4K or faster. It shall include an integrated
economizer controller.
7. LonWorks Interface System:
Units shall have all features listed above (either
Complete C or Deluxe D) and the control board
shall be supplied with a LonWorks interface
board, which is LONMark certified. This will
permit all units to be daisy chained via a 2-wire
twisted pair shielded cable. The following points
must be available at a central or remote com-
puter location:
a. space temperature
b. leaving-water temperature
c. discharge-air temperature
d. command of space temperature set point
e. cooling status
f. heating status
g. low temperature sensor alarm
h. low pressure sensor alarm
i. high pressure switch alarm
j. condensate sensor alarm
k. high/low voltage alarm
l. fan "ON/AUTO" position of space
thermostat
m. unoccupied/occupied command
n. cooling command
o. heating command
p. fan "ON/AUTO" command
q. fault reset command
r. itemized fault code revealing reason for spe-
cific shutdown fault (any one of 7)
This option also provides the upgraded 75 va
control transformer with load side short circuit
and overload protection via a built in circuit
breaker.
J. Piping:
1. Supply and return water connections shall be
copper FPT fittings and shall be securely
mounted flush to the cabinet corner post
allowing for connection to a flexible hose with-
out the use of a back-up wrench.