Installation manual

ROBERTS GORDON
®
ULTRAVAC™ CONTROLLER INSTALLATION MANUAL
10
SECTION 3: INSTALLATION
Installation of the ROBERTS GORDON
®
ULTRAVAC™ Controller and the associated external
electrical wiring must be done by an electrician
qualified in the installation of control systems for
heating equipment.
3.1 Preparation
Before installing the controller, observe the following:
3.1.1 Ensure that you have a copy of the site layout
for the project that clearly identifies the separate
zones.
3.1.2 Familiarize yourself with the Controller and
Variable Frequency Drive component names and
locations. See Page 8, Figure 2 and Page 9, Figure
3.
3.2 Positioning the ROBERTS GORDON
®
ULTRAVAC™ Controller and
Variable Frequency Drive
3.2.1 Choose a mounting location for the controller.
Generally near the pump, a dedicated phone con-
nection (optional) and the variable frequency drive.
For serviceability, it is convenient to mount the con-
troller and variable frequency drive in the vicinity of
the pump.
Do not mount controller or VFD outdoors. VFD
must not be installed where subjected to adverse
conditions such as: combustible, oily, or hazard-
ous vapors or dust; excessive moisture or dirt;
vibration. To avoid damage from possible drips,
do not mount controller or VFD directly beneath
pump.
VFD should be mounted in locations where the
maximum ambient temperature does not exceed
104°F (40°C). Avoid installing the VFD in mezza-
nines, direct sunlight, or near external heat
sources because these locations usually have
unpredictable temperature rises.
Note that the maximum distance from the controller
to any sensor is 300' (120 m). For longer distances,
larger gauge wire may be needed.
(Consult your local distributor) For multiple
controllers, maximum length of communication wire
from the first controller to the last is 4000' (1219m).
3.2.2 Position the controller and VFD at occupant
level for ease of service. To avoid electrical
interferences with communications bus, do not
mount VFD directly next to controller. Allow 2'
(.6 m) between controller and VFD.
FIGURE 4: Controller Mounting
WARNING
Mounting Hazard
Mount controls with materials
with a minimum working
load of 75 lbs (33 kg).
Failure of the supports can
result in death, injury
or property damage.
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