IM 798 AE Self-Contained Unit Ventilator / Page 43 of 60
MicroTech II
™
Wiring
Figure 85 – Surface Mounting Using Small Base
NOTICE
Terminal Block on 111048101 Sensor
Shielded cable should always be used. It is the responsibility of
others to determine what constitutes an “electrically noisy”
environment for each installation. Refer to table 28 for maximum
wire length.
Figure 87 – 111048102 (Deluxe) and 111048103 (Expanded)
Sensor Wiring
Maximum Wire Length for Less Than 1
o
F Error
Wire Gauge
Wire Length
14 AWG
800 Ft.
16 AWG
500 Ft.
18 AWG
310 Ft.
20 AWG
200 Ft.
22 AWG
124 Ft.
Table 15– Maximum Wire Length
Setup and Adjustments
Switching Setpoint Dials
To switch setpoint dials:
1. Remove the sensor from the mounting base.
2. Rotate the smooth setpoint dial so that it points straight up.
3. As shown in Figure 88, insert the Allen wrench through the hole
in the back of the printed wiring board (A) and push gently until
the smooth setpoint dial is free.
4. Press the serrated setpoint dial into place on the sensor,
making sure that the dial points straight up.
5. Replace the sensor on the mounting base.
Repairs and Replacement
No repair options available. Call your local AAF-McQuay
representative for sensor replacement.
Figure 88 – Removing the Standard Setpoint Dial
8. Drill two 8 mm (5/16 in.) holes at the markings.
9. Insert the hollow plastic wall anchors (Figure 84), position
the base, and then drive the two pan-head tapping screws.
10. Pull the wiring through the mounting base.
11. Wire to the appropriate terminals to the small mounting
base as shown in “Wiring”.
12. Snap the sensor into the small mounting base (cover screw is not
required).
All MicroTech II equipped unit ventilators are provided as standard
with a unit mounted space temperature sensor. The unit mounted
temperature sensor is provided with a quick disconnect plug
which can be located using the unit electrical schematic. When
using a remote wall-mounted temperature sensor, the unit
mounted temperature sensor quick disconnect plug must be
disconnected from the UVC.
Figure 86 – 111048101 Sensor Wiring (Basic)
NOTICE
Allen wrench hole
Setpoint dial
Step 6 – Unit Electrical and Control Connections
