30 November 1998
b. In addition, the contract drawings for each control system will show the specific interior door
arrangement, showing front and rear views, the back panel layout, and the terminal block layout for the
control system, on the contract drawings.
10. STANDARD SINGLE-LOOP CONTROLLER HVAC CONTROL PANEL.
a. Figures 4-6a through 4-6i will provide the guidance for the HVAC control panel arrangement for
typical HVAC control systems.
Figure 4-6a. Standard wall-mounted HVAC control panel arrangement.
Figure 4-6b. Section "A-A" through the standard HVAC control panel.
Figure 4-6c. Standard HVAC control panel interior door.
Figure 4-6d. Standard HVAC control panel back panel layout.
Figure 4-6e. Standard HVAC control panel terminal block assignments.
Figure 4-6f. Controller wiring.
Figure 4-6g. Supply fan and return fan starter wiring.
Figure 4-6h. Exhaust fan and pump starter wiring.
Figure 4-6i. HVAC control panel power wiring.
b. The standard wall-mounted HVAC control panel (see figure 4-6a) is a standard enclosure of a
specific size. This panel contains the single-loop controllers, IPs, power supply, indicators, gauges,
function modules, relays, clocks, and terminal blocks, for connection to external devices and circuits and
for connection to EMCS.
c. Figure 4-6b, section "A-A" through the panel, shows the general arrangement of the inside of the
panel. The interior door, located behind the exterior key-locked door, is the mounting surface for
controllers, receiver gauges, main air gauge, switches, and lights. The interior door has a continuous
piano-type hinge to support the door and its devices. The back panel accommodates vertical and
horizontal wiring ducts, and standard-size mounting rails. The mounting rails for the terminal blocks are
elevated from the back panel to accommodate the wiring from the wiring ducts.
d. Figure 4-6c shows the general layout of the interior door for HVAC control panels. The front view
shows that the panel's interior door will accommodate up to six controllers with receiver gauges in two
rows of three controllers each. The main air gauge is on the right, and five pneumatic output indicators
for IPs are located to the left of the main air gauge. The rear view shows rail-mounted IPs, connections
to gauges, and a valve to access the main air for maintenance. In the event that additional space is
required for function modules, such as loop drivers, they may be shown on this rail. The general
arrangement shown will not be changed for the sake of symmetry. It is intended that this panel will
accommodate one control system for an air-delivery HVAC system and may also accommodate hydronic
or other HVAC control systems. The switch and pilot light matrix will have the devices arranged in the