Install Motormaster® III Controls — Only one Motormaster III control is required per unit.
Motor — One
For
For
For 48AJ,AK,AW,AY060 and
The no. 4, 5, and 6 OFMs are controlled to shut off at 55 F and on at 65 F
Sensor — Install the sensor for thermistor input control in the location shown in Fig.
Signal Selection Switch — Remove the cover of the Motor- master III control. Set the switch to accept the thermistor sensor input signal. Set the frequency to match the unit power supply (60 Hz).
Motormaster III Control — The recommended mounting loca- tion is in the indoor fan section, mounted on the panel that sep- arates the indoor and outdoor sections. On VAV units, this location is next to the VFD (variable frequency drive).
Do not route the Motormaster III control wiring next to the VFD on VAV units. Use a separate connector through the parti- tion when wiring to the OFM.
Electrical Connections
To avoid possibility of electrical shock and personal injury, turn off all power to unit before making electrical connections.
When replacing the OFM, reconnect the black, yellow, and blue wires form the outdoor fan contactor to the black, yellow, and blue wires of the Motormaster III control. Run new wires from the red, orange, and brown wires to the leads of the new OFM. Connect the green wire from the control to ground.
NOTE: On all
1 BOTH SIDES
18
B
0.312 DIA HOLES
61
17.167 |
|
BETWEEN |
|
HOLES |
|
(TYPICAL) |
A | 0.5 |
4.62 |
|
UNIT SIZE | A | B | |
80.5 | 79.5 | ||
|
| ||
48AJ,AK,AW,AY060 and | 120.5 | 119.5 | |
|
|
NOTE: All dimensions are in inches. Material: 20 gage galvanized steel or other
Fig. 52 — Motormaster III Control Baffle Details
Fig. 53A — Motormaster III Sensor Location
(48AJ,AK,AW,AY020-030 and
55