SECTION 3: INSTALLATION
SECTION 3: INSTALLATION
WARNING
Severe Injury Hazard
Mount controls with materials with a minimum working load of 75 lbs (33 kg).
Failure to follow these instructions can result in death, injury or property damage.
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:
3.1.1Ensure that you have a copy of the site layout for the project that clearly identifies the separate zones.
3.1.2Familiarize yourself with the Controller and Vari- able Frequency Drive component names and loca- tions. See Page 8, Figure 2 and Page 10, Figure 3.
3.2Positioning the ROBERTS GORDON®
ULTRAVAC™ Controller and Variable Frequency Drive
3.2.1Choose 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 at occupant level 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. Models with NEMA 4 rated enclosures will withstand exposure to dust, dirt and water.
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' (1219 m).
3.2.2Position 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) minimum between controller and VFD.
FIGURE 4: Controller Mounting
(Standard enclosure only, NEMA 4 enclosure mount- ing varies)
16.25"
(41.3 cm)
13" (33 cm) 
11
