C L I M A T E M A S T E R W A T E R - S O U R C E H E A T P U M P S
Vertical DOAS
R e v. : 0 1 / 3 1 / 1 3
26
C l i m a t e M a s t e r Wa t e r - S o u r c e H e a t P u m p s
This wall-mountable display is an IP30 rated device.
Ambient conditions must be between 32.0ºF and 120.0ºF
and less than 85% RH. The controller’s RS485 serial
interface communicates via three-way plug-in terminals.
Use a twisted pair plus shielded cable, 20-22 AWG.
Total length of the network must not exceed 1,500 feet.
The capacitance between the wires must not exceed 90
pF/M. See your wiring schematic for connection details.
Note that undersized wiring will cause inaccurate sensor
readings.
These remote devices require a separate 24Vac 50/60HZ
1.5VA power connection. Provide a dedicated 250mAT
fuse for each sensor. Use a class 2 safety transformer with
a minimum rating of 4VA. If the sensor is wired to F1 and
F2 of the DOAS unit control panel terminal, G0 must be
connected to F2.
Do not run sensor wiring adjacent to, or in the same
conduit as wires carrying more than 24 VAC.
Mounting the Remote Terminal -
The remote terminal
must be located in a dry, non-corrosive environment.
Operating conditions must be between 0.0ºF and 140.0ºF
and less than 90% RH. Moisture or chemicals can damage
the circuitry of the display. The display can either be
affi xed directly to the DOAS unit (indoor models only) or
located up to 20 feet away using the cable that came with
the display.
Figure 6: Remote Room Sensor
Installing the Remote Terminal - The remote terminal
is an IP40 device and is powered through the cable
provided. If a longer length is required, a standard 24
AWG, 6 conductor phone cable may be used up to 150
feet. For location of the sensor up to 1,500 feet, use 22
AWG, 3 twisted pair cable. See your wiring schematic for
connection details. Pull the cord and connector through
the hole in the back of the mounting bracket. Attach the
bracket to the wall. After plugging the cord into the back
of the remote display, feed any extra wiring back into the
hole of the mounting bracket and gently snap the remote
display into the bracket.
Figure 7: Remote Terminal
CAUTION!
CAUTION! Do not run the remote terminal wiring in the
same conduit as, or adjacent to wires carrying over 30 volts!
Controls Wiring -
Many of the controls and sensors in the
ClimateMaster Tranquility DOAS units have been factory-
installed and wired. However, you will have to make
certain connections in the fi eld.
Occupancy Contact -
ClimateMaster makeup air DOAS
units as standard are pre-wired to work with a fi eld-
provided occupancy timer, switch, or dry contact closure
from a building management system, which will start the
supply blower during periods of occupancy. Whether
this switch is manually activated or a relay activated by a
building energy management system, its contacts must
be rated for at least 10 VA at 24 VAC.
